CN112255366A - Gas detector with waterproof capability - Google Patents
Gas detector with waterproof capability Download PDFInfo
- Publication number
- CN112255366A CN112255366A CN201910660593.7A CN201910660593A CN112255366A CN 112255366 A CN112255366 A CN 112255366A CN 201910660593 A CN201910660593 A CN 201910660593A CN 112255366 A CN112255366 A CN 112255366A
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- CN
- China
- Prior art keywords
- inlet
- gas
- shroud
- circumferential wall
- gas detector
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 41
- 239000000523 sample Substances 0.000 claims abstract description 19
- 210000005069 ears Anatomy 0.000 claims description 8
- 239000007789 gas Substances 0.000 description 55
- 239000002360 explosive Substances 0.000 description 5
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- GQPLMRYTRLFLPF-UHFFFAOYSA-N Nitrous Oxide Chemical compound [O-][N+]#N GQPLMRYTRLFLPF-UHFFFAOYSA-N 0.000 description 2
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- ZWWCURLKEXEFQT-UHFFFAOYSA-N dinitrogen pentaoxide Chemical compound [O-][N+](=O)O[N+]([O-])=O ZWWCURLKEXEFQT-UHFFFAOYSA-N 0.000 description 2
- WFPZPJSADLPSON-UHFFFAOYSA-N dinitrogen tetraoxide Chemical compound [O-][N+](=O)[N+]([O-])=O WFPZPJSADLPSON-UHFFFAOYSA-N 0.000 description 2
- LZDSILRDTDCIQT-UHFFFAOYSA-N dinitrogen trioxide Chemical compound [O-][N+](=O)N=O LZDSILRDTDCIQT-UHFFFAOYSA-N 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 231100000331 toxic Toxicity 0.000 description 2
- 230000002588 toxic effect Effects 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 238000003491 array Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000001272 nitrous oxide Substances 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 230000007096 poisonous effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000004078 waterproofing Methods 0.000 description 1
Images
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
Abstract
The application discloses gas detector with waterproof grade includes: a probe body including a mount having a sensing element disposed therein, the mount having an inlet for a gas to be measured, the inlet defining an axial direction; and a shroud having a circumferential wall defining an enclosure space inside the shroud, the enclosure space having a proximal end and a distal end in the axial direction, the shroud being attached to the mount such that the proximal end of the enclosure space is located adjacent the inlet, wherein a plurality of shield elements are attached to the circumferential wall, each of the plurality of shield elements being configured to form a passage for water flow between an exterior of the shroud and the enclosure space and to extend toward the distal end.
Description
Technical Field
The present application relates to a detector for gas detection.
Background
Industrial gas detectors for detecting flammable and explosive gases and toxic and harmful gases are used, for example, in urban underground pipe gallery works. Various domestic water, urban water and industrial wastewater are conveyed through the drainage pipe. In closed pipelines, the physical and chemical reactions of organic and inorganic substances are filled, and combustible explosive gases and toxic and harmful gases, such as nitrogen oxides, can be produced, and the method comprises the following steps: nitrous oxide, nitric oxide, dinitrogen trioxide, dinitrogen tetroxide, dinitrogen pentoxide and the like, carbon monoxide, carbon dioxide, sulfur dioxide, hydrogen sulfide, oxygen, methane, ammonia and other gases, and when flammable and explosive gases reach a certain concentration, the flammable and explosive gases have explosion risks. The concentration of the poisonous and harmful gas reaches a certain degree, and the great personal harm can be caused to the operating personnel.
In order to eliminate the potential safety hazard of the urban drainage pipe network and ensure the safe operation of the drainage pipe network, a gas detector is adopted, and an inflammable and explosive gas real-time monitoring system of the drainage pipe is used for implementing unmanned remote real-time monitoring on the drainage pipe by means of a modern computer communication technology and a sensing technology. A sensor is arranged in the gas detector to pass through the gas to be detected and detect the gas. The high humidity and moist environment of underground piping places water-resistant requirements on gas detectors. It is undesirable for water or gas to entrain moisture into the sensor, which can have a significant adverse effect on the detection results.
One solution is to add a housing to the gas detector to protect it from water. However, the existing shell cannot produce an ideal effect, namely, water is prevented from flowing into the sensor so as to thoroughly remove water in the gas to be measured. Moreover, such housings have difficulty complying with the test requirements of industrial waterproofing grades, i.e. the housings have difficulty withstanding the jet of a water column under pressure in such tests, inevitably carrying water into the sensor.
Disclosure of Invention
One aspect to which the present application relates is to provide a gas detector having a waterproof rating with improved waterproof performance.
A gas detector having waterproof capability, comprising:
a probe body including a mount having a sensing element disposed therein, the mount having an inlet for a gas to be measured, the inlet defining an axial direction;
a shroud having a circumferential wall defining an enclosure space inside the shroud, the enclosure space having a proximal end and a distal end in the axial direction, the shroud being attached to the mount such that the proximal end of the enclosure space is located adjacent the inlet, wherein a plurality of shield elements are attached to the circumferential wall, each of the plurality of shield elements being configured to form a passage for water flow between an exterior of the shroud and the enclosure space and to direct the water flow toward the distal end.
Optionally, in an embodiment of the above gas detector, the cover is shaped as a box, and the plurality of shielding elements are arranged on a plurality of opposite sides of the box.
Optionally, in an embodiment of the above gas detector, the plurality of shielding elements are arranged parallel to the axial direction to form an array of at least one shielding element on the circumferential wall.
Optionally, in an embodiment of the above gas detector, the channel has an inlet end for water flow to enter and an outlet end for water flow to exit, wherein the inlet end is provided at the circumferential wall and arranged in the transverse direction and the outlet end is arranged in the longitudinal direction towards the distal end.
Optionally, in an embodiment of the above gas detector, the channel is formed by at least a portion of the circumferential wall and a channel section connected between the inlet end and the outlet end, the channel section extending from the circumferential wall towards the enclosure; the channel section is shaped to have an arcuate or dog-leg cross-section.
Optionally, in an embodiment of the above gas detector, the channel section comprises a first baffle proximate the inlet end, a second baffle connected to the first baffle and proximate the outlet end, and a first side plate and a second side plate on either side of the first and second baffles, respectively, and connecting the circumferential walls, wherein the second baffle is angled with respect to the first baffle.
Optionally, in an embodiment of the above gas detector, the cover has an interface portion protruding outwardly at the proximal end and receives at least a portion of the mount in the interface portion in the axial direction such that the inlet is closed.
Optionally, in an embodiment of the above gas detector, the interface portion is detachably fixed to the mounting seat.
Optionally, in an embodiment of the above gas detector, a plurality of first and second ears oppositely facing each other are protruded from an outer side of the connecting port portion, and the first and second ears are connected by a fastening member.
Optionally, in an embodiment of the above gas detector, a dust-proof filter screen is disposed at an inlet of the mounting seat, and the gas to be detected passes through the filter screen and is sensed by the sensing element.
The application can be installed according to environmental conditions. The shield is attached to the mounting of the probe so that the shield protects the sensing element located within the mounting adjacent the inlet from direct damage to the sensor by water flow. The cover is convenient to clean, remove and use due to the external mounting.
The cover is of a single-shell structure, and the path of the gas to be detected flowing into the sensing element can be shortened.
The application can adapt to the test examination of high waterproof grade, such as IPX5 grade. The cover can resist water spray in all directions, improves air intake efficiency, and forcibly changes the water flow direction to be away from the sensing element by absorbing the energy of the water flow. Therefore, the application has more application spaces, and guarantees are provided for urban underground pipe gallery engineering.
Of course, this application also can be used for other industrial places except that underground piping, when not needing the waterproof requirement of especially high, only need with the cover from the probe main part dismantle can.
Other aspects and features of the present application will become apparent from the following detailed description, which proceeds with reference to the accompanying drawings. It is to be understood, however, that the drawings are designed solely for purposes of illustration and not as a definition of the limits of the application, for which reference should be made to the appended claims. It should be further understood that the drawings are merely intended to conceptually illustrate the structures and procedures described herein, and that, unless otherwise indicated, the drawings are not necessarily drawn to scale.
Drawings
The present application will be more fully understood from the detailed description given below with reference to the accompanying drawings, in which like reference numerals refer to like elements throughout the views. Wherein:
FIG. 1 is a schematic view of an embodiment of a gas detector to which the present application relates;
FIG. 2 is a schematic view of a detector body of the gas detector of FIG. 1;
FIG. 3 is a schematic view of a housing of a gas detector to which the present application relates;
FIG. 4 is a cross-sectional view of the shroud of FIG. 3 taken along A-A;
FIG. 5 is a cross-sectional view of the cover of FIG. 3;
FIG. 6 is a cut-away perspective view of the cover of FIG. 3;
fig. 7 is a top view of the cover of fig. 3.
Detailed Description
To assist those skilled in the art in understanding the subject matter claimed herein, specific embodiments thereof are described below in detail with reference to the accompanying drawings.
FIG. 1 shows a schematic view of an embodiment of a gas detector to which the present application relates. The gas detector includes a detector body 10 and a cover 20, the cover 20 being attached to the detector body 10. Referring to fig. 2, the probe body 10 includes a mount 12 in which a sensing element (not shown) is disposed, and in the drawing, the mount 12 is cylindrical in shape. The mounting 12 also has an inlet 16 at which a filter 14 is provided, through which gas to be measured enters the probe body 10 in the direction of the solid arrows and then contacts the sensing element. Processing means operating on the basis of the sensing element input are provided in a position deeper from the inlet to obtain the properties characteristic of the gas to be measured, to obtain information on the concentration, content, etc. of the gas, and to convert this information into digital information to be transmitted to a remote controller, which may also be displayed on the probe body or output in the form of an alarm signal. The filter 14 is detachably coupled to the inlet, and the gas to be measured is filtered to remove substances that do not need to be measured, such as dust particles entrained in the gas to be measured, when passing through the filter, so as to improve the purity of the gas.
It is desirable to avoid water from entering the probe body 10. Figures 1-2 all show the general working of the probe body. Gas enters the probe body 10 from the bottom. The cover 20 is disposed under the probe body 10 for improving the waterproof capability of the probe.
The specific structure of the cover 20 is shown in fig. 3-5. The cover 20 is formed as a box made of a stainless steel material, such as sheet steel, and includes a peripheral wall 22 and a bottom wall 24. The circumferential wall 22 includes a first side 32, a second side 34, a third side (not shown), and a fourth side 36. The first side 32 is opposite the third side and the second side 34 is opposite the fourth side 36. The four side portions form the circumferential wall 22 of a single-layer structure, and define an enclosed space 39 inside the circumferential wall 22. See the schematic view of the interior of the enclosure of fig. 5, which shows a portion of the enclosed space 39. The enclosed space 39 is with respect to the center linelAround the centre line when the shield is attached to the probe bodylI.e. the axis of the inlet. The enclosed space 39 also has a proximal end 27 proximal to the inlet and a distal end 28 distal to the inlet in the axial direction. In the normal operating condition of the probe, the axial or centerline direction is longitudinal, with the proximal end 27 at the top of the housing and the distal end 28 at the bottom wall 24 of the housing. It is contemplated that the shroud may have other shaped configurations other than a box, in which the shroud likewise has proximal and distal ends in the axial direction.
Referring to fig. 3-6, a plurality of shield elements 42 are provided on the circumferential wall 22, i.e., on the first side 32, the second side 34, the third side, and the fourth side 36, to protect the sensing elements of the probe from all directions. The shielding element 42 is not arranged on the bottom wall 24 of the housing, which bottom wall 24 isolates the bottom of the detector from the outside. The plurality of shield members 42 may be parallel to the centerlinelArranged as an array of shading elements. In the embodiment shown in the figures, the first, second, third and fourth side portions are each provided with an array comprising four shading elements. Of course, the number of arrays of shield elements and the number of shield elements in each array may be higherOr less depending on the geometry of the enclosure, the water-proof rating of the detector, etc.
Each shield member 42 forms a passage 44 (shown in figure 4) between the exterior of the shroud and the enclosed space 39. A flow of water, in particular a water column with a certain pressure, can pass through the channel 44. The channel is designed to direct the flow direction of the water flow. As shown in fig. 4, the channel 44 directs the flow of water (dashed arrow) toward the distal end 28, thereby resolving the problem of water flow after exiting the channel. The shielding element is arranged in a channel form, so that the path of the water flow is defined, and after the water flow enters the channel, the kinetic energy of the water flow is absorbed by the channel wall, so that the path control of the water flow is further facilitated. On the other hand, the flow of gas (see solid arrows) into the channel with the water flow is not restricted and, as the gas leaves the channel, it diffuses into the enclosure and is sensed as it enters the inlet. In the normal operating conditions of the probe, since the gas is lighter than water, within the enclosure, the gas separates from the water and moves towards the top of the enclosure (i.e. the proximal end 27 of the enclosure) and eventually enters the inlet of the probe body.
The passageway 44 includes an inlet end 46 into which the water enters and an outlet end 47 from which the water exits. The inlet end is arranged in the transverse direction and the outlet end 47 is arranged in the longitudinal direction and is open towards the enclosed space 39, whereby the water flow is redirected by means of the channel after entering and its own kinetic energy is reduced after hitting the channel walls. The inlet end 46 may open directly into the circumferential wall, as shown in fig. 3, with the inlet end being an open slot 49 in the first, second, third and fourth sides. The outlet port 47 may be positioned lower than the inlet port 46 to avoid gas backflow.
The channel section 48 is located between the inlet end and the outlet end. The channel section 48 extends a distance from the circumferential wall 22 towards the enclosure 39, and the channel section 48 forms the channel 44 with a portion of the circumferential wall 22. The channel section 48 may be attached to the circumferential wall 22 or may be integrally formed with the circumferential wall 22. The channel section 48 has a cross-section that is a broken line as shown in fig. 4-5, but may also be an arcuate cross-section. Regardless of the cross-section, the channel section 48 extends distally.
Further, in the embodiment shown in fig. 6, a plurality of channel segments 48 with the same structure and with a polygonal cross section are shown, and the channel segments 48 on the second side portion 34 are taken as an example, and include a first blocking plate 52, a second blocking plate 54, a blocked first side plate and a non-shown second side plate. With the first baffle 52 being adjacent the inlet end 46, the second baffle 54 being connected to the first baffle 52 and the second baffle 54 being adjacent the outlet end 47. The first and second side plates are located on either side of the first and second baffles 52, 54, respectively, and are connected between the first and second baffles 52, 54 and the circumferential wall 22 so as to construct a closed subspace that is open only at the inlet end 46 and the outlet end 47, thus ensuring that water flow within the channel 44 will only flow to the outlet end 47 towards the distal end 28. On the second side 34, there are four such channel sections. Identical channel sections are also provided on the first side 32, the third side and the fourth side 36, not shown, as shown by the channel sections of the first baffle 52a, the second baffle 54a, the first side plate 56a, the second side plate 57a on the first side 32, and four such channel sections are provided on the first side 32. Likewise, the same number of channel sections are arranged on the fourth side 36, each including a first baffle 52b, a second baffle 54b, a first side plate 56b and a second side plate 57b, not shown. Of course, it is also possible to use the above-described channel sections partially on the sides.
Still further, the first baffle 52 is inclined, the second baffle 54 is disposed longitudinally, and the first baffle 52 is angled relative to the second baffle 54. An optimized occlusion effect can be obtained by calculating the total area of the first barrier 52, the second barrier 54, the first side plate, and the second side plate.
The cover is connected with the mounting seat of the detector main body. The cap is provided with a socket 26 projecting outwardly at a proximal end, which socket 26 can be brought into a socket-in axial direction with a cylindrical sleeve of the mounting socket. When mounted in place, the inlet for the gas to be measured is enclosed within the enclosure, that is, the inlet receives only gas that enters the enclosure via the shroud.
In addition, the interface portion 26 is removably mounted with the mounting socket, thereby facilitating convenient separation of the cover from the probe body during periods of required maintenance or servicing. As shown in FIG. 7, the interface portion 26 may also be cylindrical in shape with a pair of ears disposed on opposite sides thereof. Of the pair of ears, first and second oppositely facing ears 62,64 extend from the interface end 26, respectively, and the mount is clamped in the interface by the ears 62,64 via fasteners 66, such as screws, passing through the ears.
Returning to fig. 4, water and test gas are introduced into the enclosure through the inlet end along the passageway, as indicated by the arrows in the figure, the test gas rising within the enclosure to the inlet at the proximal end 27 as indicated by the solid arrows, and the water exiting the outlet end as indicated by the dashed arrows moving in the opposite direction toward the distal end 28. As a drainage, the inlet end 46' of the passage of the lowermost screen element disposed in the array of screen elements may act as a drainage end to let water out after it has accumulated at the bottom of the hood.
While specific embodiments of the present application have been shown and described in detail to illustrate the principles of the application, it will be understood that the application may be embodied otherwise without departing from such principles.
Claims (10)
1. A gas detector having waterproof capability, comprising:
a probe body (10) comprising a mount (12) in which a sensing element is disposed, the mount having an inlet (16) for a gas to be measured, the inlet defining an axial direction;
a shroud (20) having a circumferential wall (22) defining an enclosure (39) inside the shroud, the enclosure having a proximal end (27) and a distal end (28) in the axial direction, the shroud being attached to the mount such that the proximal end of the enclosure is located adjacent the inlet, wherein a plurality of shield elements (42) are attached to the circumferential wall, each of the plurality of shield elements being configured to form a passage (44) for water flow between the exterior of the shroud and the enclosure and extending toward the distal end.
2. The gas detector of claim 1, wherein: the cover is shaped as a box, the plurality of shielding elements being arranged on a plurality of opposite sides of the box.
3. A gas sensor according to claim 1 or 2, wherein: the plurality of shield elements are arranged parallel to the axial direction to form an array of at least one shield element on the circumferential wall.
4. A gas sensor according to claim 1 or 2, wherein: the channel has an inlet end (46) for the water flow to enter and an outlet end (47) for the water flow to exit, wherein the inlet end is provided at the circumferential wall and is arranged in the transverse direction and the outlet end is arranged in the longitudinal direction towards the distal end.
5. The gas detector of claim 4, wherein: said channel being formed by at least a portion of said circumferential wall and a channel segment (48), the channel segment (48) being connected between said inlet end and said outlet end, said channel segment extending from said circumferential wall towards said enclosure; the channel section is shaped to have an arcuate or dog-leg cross-section.
6. The gas detector of claim 5, wherein: the channel segment includes a first baffle (52) adjacent the inlet end, a second baffle (54) connected to the first baffle and adjacent the outlet end, and first and second side plates (56, 57) on either side of the first and second baffles, respectively, and connecting the circumferential walls, wherein the second baffle is angled relative to the first baffle.
7. A gas sensor according to claim 1 or 2, wherein: the shroud has an interface portion (26) projecting outwardly at the proximal end and receives at least a portion of the mount in the axial direction therein such that the inlet is closed.
8. The gas detector of claim 7, wherein: the interface portion is detachably fixed on the mounting seat.
9. The gas detector of claim 8, wherein: a plurality of oppositely facing first and second ears (62,64) project outwardly from the interface portion and are connected by fasteners (66).
10. A gas sensor according to claim 1 or 2, wherein: the inlet of mount pad is provided with dirt-proof filter screen (14), and the gas that awaits measuring is passed through behind the filter screen by sensing element sensing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910660593.7A CN112255366A (en) | 2019-07-22 | 2019-07-22 | Gas detector with waterproof capability |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910660593.7A CN112255366A (en) | 2019-07-22 | 2019-07-22 | Gas detector with waterproof capability |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112255366A true CN112255366A (en) | 2021-01-22 |
Family
ID=74223913
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910660593.7A Pending CN112255366A (en) | 2019-07-22 | 2019-07-22 | Gas detector with waterproof capability |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112255366A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030121782A1 (en) * | 2001-01-26 | 2003-07-03 | Ngk Spark Plug Co., Ltd. | Gas sensor |
| CN1907203A (en) * | 2006-08-11 | 2007-02-07 | 泰怡凯电器(苏州)有限公司 | Water-proof mechanism of dust collector generator chamber |
| JP2008232652A (en) * | 2007-03-16 | 2008-10-02 | Denso Corp | Gas sensor |
| US20100122569A1 (en) * | 2008-11-17 | 2010-05-20 | Denso Corporation | Gas sensor provided with inner and outer covers for gas sensing element |
| CN104459028A (en) * | 2013-09-18 | 2015-03-25 | 罗伯特·博世有限公司 | Gas sensor protection device and method |
-
2019
- 2019-07-22 CN CN201910660593.7A patent/CN112255366A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030121782A1 (en) * | 2001-01-26 | 2003-07-03 | Ngk Spark Plug Co., Ltd. | Gas sensor |
| CN1907203A (en) * | 2006-08-11 | 2007-02-07 | 泰怡凯电器(苏州)有限公司 | Water-proof mechanism of dust collector generator chamber |
| JP2008232652A (en) * | 2007-03-16 | 2008-10-02 | Denso Corp | Gas sensor |
| US20100122569A1 (en) * | 2008-11-17 | 2010-05-20 | Denso Corporation | Gas sensor provided with inner and outer covers for gas sensing element |
| CN104459028A (en) * | 2013-09-18 | 2015-03-25 | 罗伯特·博世有限公司 | Gas sensor protection device and method |
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