CN105675710B - Ionization chamber and photoionization sensor - Google Patents
Ionization chamber and photoionization sensor Download PDFInfo
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- CN105675710B CN105675710B CN201610205460.7A CN201610205460A CN105675710B CN 105675710 B CN105675710 B CN 105675710B CN 201610205460 A CN201610205460 A CN 201610205460A CN 105675710 B CN105675710 B CN 105675710B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/62—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating the ionisation of gases, e.g. aerosols; by investigating electric discharges, e.g. emission of cathode
- G01N27/64—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating the ionisation of gases, e.g. aerosols; by investigating electric discharges, e.g. emission of cathode using wave or particle radiation to ionise a gas, e.g. in an ionisation chamber
- G01N27/66—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating the ionisation of gases, e.g. aerosols; by investigating electric discharges, e.g. emission of cathode using wave or particle radiation to ionise a gas, e.g. in an ionisation chamber and measuring current or voltage
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J27/00—Ion beam tubes
- H01J27/02—Ion sources; Ion guns
- H01J27/24—Ion sources; Ion guns using photo-ionisation, e.g. using laser beam
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Abstract
The invention discloses an ionization chamber and a photoionization sensor, wherein the ionization chamber is used for the photoionization sensor and comprises an ionization chamber main body (1) provided with an ionization cavity (10), a filter membrane (2) and a circuit board (3) which are respectively and hermetically arranged at two ends of the ionization cavity (10), and an air inlet nozzle (4) and an air outlet nozzle (5) which are communicated with the ionization cavity (10); the air inlet nozzle (4) and the air outlet nozzle (5) are arranged on the same side of the ionization chamber main body (1). The beneficial effects of the implementation of the invention are as follows: the ionization chamber is of a structure that the air inlet nozzle and the air outlet nozzle are arranged on the same side of the main body of the ionization chamber, so that gas to be detected entering the ionization chamber can be retained in the ionization chamber for a long time, and gas molecules to be detected can be fully and uniformly ionized in the ionization chamber, and the performances of the photoionization sensor, such as sensitivity, repeatability, anti-interference capability, response time and the like, can be improved.
Description
Technical field
The present invention relates to gas detection technology fields, more specifically to a kind of ionisation chamber and optic ionized sensor.
Background technique
PID (detection of Photo Ionization Detection photoionization) technology is effectively examined as a kind of accurate
Survey means are more and more widely used.The basic principle of PID is using caused by inert gas vacuum discharge phenomenon
Ultraviolet light ionizes under test gas molecule, and by current strength caused by the gas after measurement ionization, thus
To under test gas concentration.
PID sensor (optic ionized sensor) is usually made of main components such as ultraviolet light source and ionisation chambers.From
Positive and negative electrode is provided in seed cell to form electric field, organic volatile molecule under the excitation of high energy ultraviolet, generate electronics and
Positively charged ion.The particle of these ionization forms electric current between electrode, the output electric current letter after detector amplifies and handles
Number, eventually detect PPM grades of concentration.In the prior art, under test gas molecule often cannot get abundant and equal in ionisation chamber
Even ionization, and make the key performances such as sensitivity, repeatability, anti-interference ability, the response time of entire PID sensor compared with
Difference.
Summary of the invention
The technical problem to be solved in the present invention is that in view of the above drawbacks of the prior art, providing a kind of under test gas point
The ionisation chamber and optic ionized sensor that son can be ionized adequately and uniformly.
The technical solution adopted by the present invention to solve the technical problems is: constructing a kind of ionisation chamber, is used for photoionization
Sensor, including offer ionization chamber ionisation chamber main body, respectively be sealingly mounted at the ionization chamber both ends filter coating and electricity
Road plate, and the suction nozzle and outlet nozzle that are connected with the ionization chamber；The suction nozzle and the outlet nozzle are mounted on described
The same side of ionisation chamber main body.
In ionisation chamber of the present invention, the ionisation chamber main body far from one end of the filter coating offer respectively with
The air inlet duct and outgassing groove that the ionization chamber is connected；The air inlet duct is located at the same of the ionisation chamber main body with the outgassing groove
Side；The suction nozzle is connected with the air inlet duct；The outlet nozzle is connected with the outgassing groove.
In ionisation chamber of the present invention, runs through on the filter coating and offer leaky hole.
In ionisation chamber of the present invention, the ionisation chamber further includes the first electrode sheet being inserted on the circuit board
With second electrode sheet；The first electrode sheet is stacked with one end second electrode sheet.
In ionisation chamber of the present invention, the first electrode on piece, which runs through, offers the first leaky hole；Described second
Run through on electrode slice and offers the second leaky hole；The leaky hole, first leaky hole and the second leaky hole three are same
Axis setting.
In ionisation chamber of the present invention, the circuit board is bonded setting with the ionisation chamber main body；The electricity
Sealing ring is installed between road plate and the ionisation chamber main body.
In ionisation chamber of the present invention, the ionisation chamber main body offers annular far from the side of the filter coating
Mounting groove；The sealing ring is mounted in the mounting groove.
In ionisation chamber of the present invention, the inner wall of the ionization chamber has been arranged radially retention bead；The filter coating
It is mutually supported with the retention bead.
In ionisation chamber of the present invention, the filter coating is made of Teflon.
A kind of optic ionized sensor, including ultraviolet lamp has also been constructed in the present invention, and as above ionization described in embodiment
Room；The ultraviolet lamp is oppositely arranged with the filter coating.
Implement ionisation chamber and optic ionized sensor of the invention, has the advantages that the ionisation chamber using peace
Mounted in the suction nozzle of ionisation chamber main body the same side and the structure of outlet nozzle, enable under test gas into the ionisation chamber compared with
It is trapped in ionization chamber for a long time, under test gas molecule can obtain sufficiently and uniform electricity in the ionisation chamber at this time
From, and then the performances such as sensitivity, repeatability, anti-interference ability and response time that can be improved optic ionized sensor.
Detailed description of the invention
Present invention will be further explained below with reference to the attached drawings and examples, in attached drawing:
Fig. 1 is the schematic perspective view for the ionisation chamber that present pre-ferred embodiments provide；
Fig. 2 is the explosive view of ionisation chamber shown in FIG. 1；
Fig. 3 is the structure chart of the ionisation chamber main body in ionisation chamber shown in FIG. 1；
Fig. 4 is another structure chart of the ionisation chamber main body in ionisation chamber shown in FIG. 1；
Fig. 5 is the structure chart of first electrode sheet and second electrode sheet installation on circuit boards in ionisation chamber shown in FIG. 1；
Fig. 6 is the schematic perspective view for the optic ionized sensor that present pre-ferred embodiments provide.
Specific embodiment
For a clearer understanding of the technical characteristics, objects and effects of the present invention, now control attached drawing is described in detail
A specific embodiment of the invention.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and do not have to
It is of the invention in limiting.It should be noted that the positional terms such as left and right, upper and lower in the embodiment of the present invention, are only opposite each other
Concept or be reference with the normal operating condition of product, and should not be regarded as restrictive.
As shown in Figure 1, Figure 2, shown in Fig. 3, Fig. 4 and Fig. 5, presently preferred embodiments of the present invention provides a kind of ionisation chamber comprising
Ionisation chamber main body 1, filter coating 2, circuit board 3, suction nozzle 4, outlet nozzle 5, sealing ring 6, first electrode sheet 7 and second electrode sheet
8。
Specifically, such as Fig. 3, Fig. 4 and refering to fig. 1 and shown in Fig. 2, which is rectangular parallelepiped structure, is opened up
There is ionization chamber 10, the both ends of ionization chamber 10 are packaged with filter coating 2 and circuit board 3 respectively.The ionization chamber 10 is gas to be detected hair
Ionization place when raw ionization, through the upper and lower end faces (diagram direction) for being provided with ionisation chamber main body 1.In the present embodiment,
Ionization chamber 10 is to offer circular through hole in cylindrical-shaped structure namely ionisation chamber main body 1 to form the ionization chamber 10.In the present invention
Other embodiments in, ionisation chamber main body 1 is not limited to rectangular parallelepiped structure, can also be for cylindric or irregular shape etc.
Structure；The structure of ionization chamber 10 is also not limited to cylindrical-shaped structure, can also be the structures such as rectangular.
Such as Fig. 2 and refering to fig. 1 and shown in Fig. 3, which is encapsulated in the one end of ionization chamber 10 far from circuit board 3, light
When ionization sensor works, ultraviolet light passes through the filter coating 2 and enters in ionization chamber 10.In the present embodiment, filter coating 2 is using special
Fluorine dragon is made namely filter coating 2 is Teflon filter coating, with good corrosion resistance and the performances such as heat-resisting.Ionization chamber 10
Inner wall be arranged radially retention bead 13, filter coating 2 is mutually supported with retention bead 13, so that filter coating 2 can consolidate
Ground is encapsulated in one end of ionization chamber 10.
In the embodiment, runs through on filter coating 2 and offer leaky hole 21.Preferably, which is arranged in filter coating 2
Center.Using the structure of the leaky hole 21, so that the ultraviolet lamp 100 (see Fig. 6) for being mounted on 2 top of filter coating issued
Ultraviolet light can only be entered in ionization chamber 10 by leaky hole 21, so that effectively limitation avoids the vacuum-ultraviolet light of disordered chain
Irradiation corrosion to the component inside ionization chamber 10, and then guarantee that stablizing for optic ionized sensor operates.
Such as Fig. 5 and refering to fig. 1 and shown in Fig. 2, first electrode sheet 7 and second electrode sheet 8 etc. are installed on the circuit board 3
Component is to form electric field.The shape of the circuit board 3 is adapted with the shape of ionisation chamber main body 1, and fitting is arranged in ionisation chamber
Side of the main body 1 far from filter coating 2.In the present embodiment, circuit board 3 is PCBA board, uses screw element with ionisation chamber main body 1
(not shown) is attached, to realize the fitting setting of the two.
As shown in Figure 1 and Figure 2, suction nozzle 4 is connected with ionization chamber 10 respectively with outlet nozzle 5, and the suction nozzle 4 is for supplying
Gas to be detected enters in ionization chamber 10, which is used to be discharged from ionization chamber 10 for the gas to be detected after ionization.This
In embodiment, suction nozzle 4 is mounted on the same side of ionisation chamber main body 1 with outlet nozzle 5.Ionisation chamber main body 1 far from filter coating 2 one
End offers the air inlet duct 11 and outgassing groove 12 being connected respectively with ionization chamber 10, and air inlet duct 11 and outgassing groove 12 are located at ionisation chamber
The same side of main body 1.Suction nozzle 4 is connected with air inlet duct 11, and outlet nozzle 5 is connected with outgassing groove 12.Using the structure, light from
When sonization working sensor, gas to be detected enters in ionization chamber 10 from suction nozzle 4, and along the circular arc wall face ring of ionization chamber 10
After a circle, ionization chamber 10 is discharged from the outlet nozzle 5 for being located at the same side, wherein the flow direction of gas to be detected institute referring to fig. 4
Show.Using the above structure, ionization chamber 10 can be trapped in for a long time by enabling to the under test gas into the ionisation chamber
It is interior so that under test gas molecule can obtain sufficiently and uniformly ionizing in the ionisation chamber, and then can be improved light from
The performances such as sensitivity, repeatability, anti-interference ability and the response time of sonization sensor.
Such as Fig. 3 and as shown in fig.2, in the embodiment, the one side of ionisation chamber main body 1 offers air inlet 15 and outlet
The end face that circuit board 3 is provided in hole 16, the side and ionisation chamber main body 1 is disposed adjacent.The air inlet 15 and 11 phase of air inlet duct
Connection, suction nozzle 4 are mounted in the air inlet 15.The venthole 16 is connected with outgassing groove 12, and outlet nozzle 5 is mounted on the outlet
In hole 16.Optic ionized sensor work when, gas to be detected successively pass through suction nozzle 4, air inlet 15 and air inlet duct 11 into
Enter in ionization chamber 10, the gas to be detected after ionization is successively discharged from outgassing groove 12, venthole 16 and outlet nozzle 5.
As shown in Fig. 2 and Fig. 4, which is mounted between circuit board 3 and ionisation chamber main body 1, to increase circuit board
Leakproofness between 3 and ionisation chamber main body 1, and then be effectively prevented from ionization chamber 10 and generate gas leak phenomenon.In the present embodiment, ionization
Room main body 1 offers the mounting groove 14 of annular far from the side of filter coating 2, and sealing ring 6 is mounted in mounting groove 14, using the knot
Structure enables to sealing ring 6 to be firmly mounted between circuit board 3 and ionisation chamber main body 1, to ensure circuit board 3 and ionisation chamber
Sealing between main body 1.Preferably, sealing ring 6 uses rubber or silica gel sealing ring.
Such as Fig. 5 and as shown in fig.2, first electrode sheet 7 and second electrode sheet 8 are inserted on circuit board 3, and first electrode
Piece 7 is stacked with second electrode sheet 8.When work, electric field, gas to be detected are formed between first electrode sheet 7 and second electrode sheet 8
Body generates electronics and positively charged ion under the excitation of ultraviolet light, and the particle of these ionization is in first electrode sheet 7 and second
Electric current is formed between electrode slice 8, the output current signal after detector amplification (not shown) and processing eventually detects PPM grades
Concentration.
In the present embodiment, first electrode sheet 7 and second electrode sheet 8 are rectangular laminated structure, four of first electrode sheet 7
Apex angle is convexly equipped with the first pin 72, and four apex angles of second electrode sheet 8 are convexly equipped with second pin 82.Correspondingly, circuit board 3
There are four four the first slots 31 compatible with the first pin 72 and four compatible with second pin 82 four for upper setting
A second slot 32.When first electrode sheet 7 and second electrode sheet 8 are inserted on circuit board 3, the two is in be stacked.Preferably,
First electrode sheet 7 is all made of stainless steel material with second electrode sheet 8 and is made.
In the embodiment, through offering the first leaky hole 71 in first electrode sheet 7, first leaky hole 71 setting is the
The center of one electrode slice 7.Through the second leaky hole 81 is offered in second electrode sheet 8, second leaky hole 81 setting exists
The center of second electrode sheet 8.Preferably, the leaky hole 21 in filter coating 2, the first leaky hole 71 in first electrode sheet 7
It is coaxially disposed with 81 three of the second leaky hole in second electrode sheet 8, using the structure, ultraviolet light direct projection can be effectively prevented from
First electrode sheet 7 generates unexpected free electron and interferes the normal work of sensor, and then guarantees optic ionized sensor
Stablize running.
As shown in fig. 6, presently preferred embodiments of the present invention also provides a kind of optic ionized sensor comprising ultraviolet lamp 100,
And ionisation chamber described in any embodiment as above.Ultraviolet lamp 100 is oppositely arranged with filter coating 2, and ultraviolet lamp 100 generates when working
Ultraviolet light pass through filter coating 2 enter ionization chamber 10 in.Using optic ionized sensor described in embodiment as above, due to described
Ionisation chamber uses the structure of the suction nozzle 4 and outlet nozzle 5 that are mounted on 1 the same side of ionisation chamber main body, so that into the ionisation chamber
Under test gas can be trapped in for a long time in ionization chamber 10, under test gas molecule can obtain in the ionisation chamber at this time
To sufficiently uniformly ionizing, and then sensitivity, repeatability, anti-interference ability and the sound of optic ionized sensor can be improved
The performances such as between seasonable.Furthermore the ionisation chamber is using the leaky hole 21 in filter coating 2, the first leaky hole in first electrode sheet 7
71 structures being coaxially disposed with the second leaky hole 81 in second electrode sheet 8, the ultraviolet light that ultraviolet lamp 100 issues can only pass through
Leaky hole 21 enters in ionization chamber 10, thus effectively limitation avoid the vacuum-ultraviolet light of disordered chain to ionization chamber 10 inside
Component irradiation corrosion, and ultraviolet light direct projection first electrode sheet 7 can be effectively prevented from and generate unexpected free electricity
Normal work that is sub and interfering sensor, and then guarantee that stablizing for optic ionized sensor operates.
The embodiment of the present invention is described with above attached drawing, but the invention is not limited to above-mentioned specific
Embodiment, the above mentioned embodiment is only schematical, rather than restrictive, those skilled in the art
Under the inspiration of the present invention, without breaking away from the scope protected by the purposes and claims of the present invention, it can also make very much
Form, all of these belong to the protection of the present invention.
Claims (9)
1. a kind of ionisation chamber is used for optic ionized sensor, it is characterised in that: the ionisation chamber master including offering ionization chamber (10)
Body (1), the filter coating (2) for being sealingly mounted at the ionization chamber (10) both ends respectively and circuit board (3), and with the ionization chamber
(10) suction nozzle (4) being connected and outlet nozzle (5)；The suction nozzle (4) and the outlet nozzle (5) are mounted on the ionisation chamber
The same side of main body (1)；The ionisation chamber main body (1) far from the filter coating (2) one end offer respectively with the ionization
The air inlet duct (11) and outgassing groove (12) that chamber (10) is connected；The air inlet duct (11) and the outgassing groove (12) are located at the electricity
The same side from room main body (1)；The suction nozzle (4) is connected with the air inlet duct (11)；The outlet nozzle (5) and it is described go out
Air drain (12) is connected；The ionization chamber (10) has circular arc wall surface, and when optic ionized sensor works, gas to be detected is from institute
It states suction nozzle (4) to enter in the ionization chamber (10), and along the circular arc wall surface (10) after a circle, from the outlet nozzle
(5) ionization chamber (10) is discharged.
2. ionisation chamber according to claim 1, it is characterised in that: run through on the filter coating (2) and offer leaky hole
(21)。
3. ionisation chamber according to claim 2, it is characterised in that: the ionisation chamber further includes being inserted into the circuit board
(3) first electrode sheet (7) and second electrode sheet (8) on；The first electrode sheet (7) and the second electrode sheet (8) are laminated
Setting.
4. ionisation chamber according to claim 3, it is characterised in that: run through on the first electrode sheet (7) and offer first
Leaky hole (71)；Run through on the second electrode sheet (8) and offers the second leaky hole (81)；The leaky hole (21), described
One leaky hole (71) and the second leaky hole (81) three are coaxially disposed.
5. ionisation chamber according to claim 1, it is characterised in that: the circuit board (3) and the ionisation chamber main body (1) are pasted
Close setting；Sealing ring (6) are installed between the circuit board (3) and the ionisation chamber main body (1).
6. ionisation chamber according to claim 5, it is characterised in that: the ionisation chamber main body (1) is far from the filter coating (2)
Side offer annular mounting groove (14)；The sealing ring (6) is mounted in the mounting groove (14).
7. ionisation chamber according to claim 1, it is characterised in that: the inner wall of the ionization chamber (10) has been arranged radially limit
Raised (13)；The filter coating (2) mutually supports with the retention bead (13).
8. ionisation chamber according to claim 1, it is characterised in that: the filter coating (2) is made of Teflon.
9. a kind of optic ionized sensor, it is characterised in that: including ultraviolet lamp (100), and such as any one of claim 1~8
The ionisation chamber；The ultraviolet lamp (100) is oppositely arranged with the filter coating (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610205460.7A CN105675710B (en) | 2016-04-05 | 2016-04-05 | Ionization chamber and photoionization sensor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610205460.7A CN105675710B (en) | 2016-04-05 | 2016-04-05 | Ionization chamber and photoionization sensor |
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| CN105675710A CN105675710A (en) | 2016-06-15 |
| CN105675710B true CN105675710B (en) | 2019-02-01 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106092898B (en) * | 2016-08-04 | 2020-12-22 | 深圳市诺安环境安全股份有限公司 | Redundant online photoion analysis system and analysis method thereof |
| US10996197B2 (en) | 2016-12-20 | 2021-05-04 | Honeywell International Inc. | Collection surface for electrodes in photoionization detector |
| CN110082453A (en) * | 2019-05-24 | 2019-08-02 | 北京市劳动保护科学研究所 | Photoionization detector |
| CN110587999A (en) * | 2019-09-18 | 2019-12-20 | 广州瑞多思医疗科技有限公司 | Ionization chamber glue filling technology and auxiliary clamp |
| CN111855850A (en) * | 2020-07-17 | 2020-10-30 | 汉威科技集团股份有限公司 | Portable photoionization detector and micro-chromatography and photoionization detection system |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1934442A (en) * | 2004-03-31 | 2007-03-21 | 矿井安全装置公司 | Photoionization detector |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100414291C (en) * | 2006-03-17 | 2008-08-27 | 中国科学院安徽光学精密机械研究所 | Portable ionization chamber of photoionization detector |
| CN202871742U (en) * | 2012-09-26 | 2013-04-10 | 天津通广集团数字通信有限公司 | PID sensor ionization gas chamber structure |
| CN203376288U (en) * | 2013-07-02 | 2014-01-01 | 华瑞科学仪器(上海)有限公司 | Detection component of PID (Photo Ionization Detector) |
| CN203772800U (en) * | 2014-02-24 | 2014-08-13 | 天津七一二通信广播有限公司 | Universal type PID sensor gas chamber structure |
| CN203838131U (en) * | 2014-05-05 | 2014-09-17 | 河北工业大学 | Multipurpose photoionization sensor gas chamber |
| CN205449880U (en) * | 2016-04-05 | 2016-08-10 | 深圳市诺安环境安全股份有限公司 | Ionization chamber and photoionization sensor |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1934442A (en) * | 2004-03-31 | 2007-03-21 | 矿井安全装置公司 | Photoionization detector |
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Address after: 518000 b1-1201, building b1b2, Guangming science and Technology Park, Investment Promotion Bureau, Fenghuang community, Fenghuang street, Guangming District, Shenzhen, Guangdong (business premises are set up in units 5B and 5C, building B6, Guangming science and Technology Park, Investment Promotion Bureau, Fenghuang community, Fenghuang street, Guangming District, Shenzhen to engage in production and business activities) Patentee after: Shenzhen noan intelligent Co.,Ltd. Address before: 518000 floor 5, building 8, zone 2, Zhongguan honghualing Industrial South Zone, No. 1213, Liuxian Avenue, Taoyuan Street, Nanshan District, Shenzhen City, Guangdong Province Patentee before: SHENZHEN NUOAN ENVIRONMENTAL & SAFETY Inc. |