CN210572099U - Photoionization ionization chamber device - Google Patents
Photoionization ionization chamber device Download PDFInfo
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- CN210572099U CN210572099U CN201921520984.0U CN201921520984U CN210572099U CN 210572099 U CN210572099 U CN 210572099U CN 201921520984 U CN201921520984 U CN 201921520984U CN 210572099 U CN210572099 U CN 210572099U
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Abstract
The utility model discloses a photoionization ionization chamber device, including the ionization chamber body, the both ends of ionization chamber body are equipped with first electric field board and second electric field board respectively, the inside of ionization chamber body is equipped with the inner casing, the upper portion of ionization chamber body is equipped with the ultraviolet lamp and is in the inner casing, the upper portion of ionization chamber body is equipped with the upper surface that ion collecting electrode is in the inner casing, the bottom of ionization chamber body is connected with electric field bias electrode and is in the bottom surface of inner casing, the upper portion of electric field bias electrode is equipped with the bottom of reference electrode inner casing; the ion collecting electrode and the electric field bias electrode of the utility model can be interchanged, and the reference electrode is flexible in position; the voltage of the electric field bias electrode can be positive voltage or negative voltage, so that the micro-current direction of the ion collector can be changed; simple structure, compactness, the material resources of using manpower sparingly reduce product cost.
Description
Technical Field
The utility model relates to a safety protection technical field specifically is a photoionization ionization chamber device.
Background
The detection mode of the photoionization sensor currently in common commercial use is as follows: when gas enters an ionization chamber of the photoionization sensor, gas molecules are bombarded by high-energy photons emitted by an ultraviolet lamp, and only after the gas molecules with ionization energy less than or equal to that of the ultraviolet light absorb one photon, the gas molecules are ionized to generate ions and electrons with positive electricity; in the ionization chamber, ions and electrons are accelerated by an external electric field and rapidly move towards a metal electrode, so that a micro-current signal related to the concentration of an object to be detected is formed, and the corresponding concentration of the gas to be detected can be calculated by detecting the magnitude of the current; however, in the prior art, the ion collecting electrode and the electric field bias electrode are fixed and can not be changed in wiring or position at the time, so that the wiring mode in the ionization chamber is very single and very fixed in use, the ionization chamber can not be used when a wrong line is connected, and the reference electrode is fixed in position; there is a great need for a photoionization ionization chamber device that is easy to wire.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a photoionization ionization chamber device has the collecting electrode and electric field offset electrode position interchangeable, and reference utmost point position is nimble and electric field offset electrode positive and negative voltage all can connect for solve the problem of proposing among the above-mentioned background art.
In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a photoionization ionization chamber device, includes the ionization chamber body, the both ends of ionization chamber body are fixed respectively and are equipped with first electric field board and second electric field board, outer electric field is constituteed to first electric field board and second electric field board, the fixed interior casing that is equipped with in inside of ionization chamber body, the fixed ultraviolet lamp that is equipped with in one end upper portion of ionization chamber body, the upper surface in interior casing that runs through of ultraviolet lamp, the fixed ion collection electrode that is equipped with in upper portion of ionization chamber body, the ion collection electrode runs through the upper surface in interior casing, the bottom fixedly connected with electric field biasing electrode of ionization chamber body, the electric field biasing electrode runs through the bottom surface in interior casing, the upper portion of electric field biasing electrode is equipped with reference electrode, reference electrode fixes the bottom in interior casing.
Preferably, the fixed air inlet that is equipped with of one end of ionization chamber body, the air inlet runs through first electric field board and is connected with the one end laminating of interior casing.
Preferably, the other end of ionization chamber body is fixed and is equipped with the gas vent, the gas vent runs through the second electric field board and is connected with the laminating of the other end of interior casing.
Preferably, the first field plate and the second field plate are disposed perpendicular to the inner housing, and the first field plate and the second field plate form an electric field parallel to the inner housing.
Preferably, the ion collecting electrode and the electric field bias electrode are symmetrically arranged, and an electric field formed by the ion collecting electrode and the electric field bias electrode is perpendicular to the inner shell.
Preferably, the ion collecting electrode and the electric field bias electrode are electrically connected with an external power supply.
Compared with the prior art, the beneficial effects of the utility model are that:
1. the ion collecting electrode and the electric field bias electrode of the utility model have the advantages of interchangeable positions, flexible reference electrode position, simplified product research and development design, simple and compact structure, manpower and material resource saving and product cost reduction;
2. the voltage applied to the electric field bias electrode can be positive voltage or negative voltage, so that the micro-current direction of the ion collector can be changed, the circuit design is simple and compact, and the low-cost realization can be realized;
3. generally, the utility model discloses a gas sensor will simplify the research and development design of product to simple structure, the material resources of using manpower sparingly reduce product cost.
Drawings
FIG. 1 is a schematic structural view of the present invention;
fig. 2 is a view of the present invention with the bias electrode at positive voltage;
fig. 3 is a view of the present invention with the bias electrode at a negative voltage;
fig. 4 is a schematic structural diagram of the electrode plate of the present invention.
In the figure: 1. an ionization chamber body; 2. a first electric field plate; 3. a second electric field plate; 4. an air inlet; 5. an exhaust port; 6. an inner housing; 7. an ultraviolet lamp; 8. an ion collecting electrode; 9. an electric field biasing electrode; 10. a reference electrode; 11. and (4) an external power supply.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The same reference numbers in different drawings identify the same or similar elements; it should be further understood that terms such as "first," "second," "third," "upper," "lower," "front," "rear," "inner," "outer," "end," "portion," "section," "width," "thickness," "zone," and the like, may be used solely for convenience in reference to the figures and to aid in describing the invention, and are not intended to limit the invention.
Referring to fig. 1, the present invention provides a technical solution: a photoionization ionization chamber device comprises an ionization chamber body 1, in order to enable air ions to move in an inner shell 6, a first electric field plate 2 and a second electric field plate 3 are respectively and fixedly arranged at two ends of the ionization chamber body 1, the first electric field plate 2 and the second electric field plate 3 form an external electric field, the first electric field plate 2 and the second electric field plate 3 are vertically arranged with the inner shell 6, the electric field formed by the first electric field plate 2 and the second electric field plate 3 is parallel to the inner shell 6, the air ions realize accelerated movement under the action of the external electric field, in order to enable the air to have a flow channel, the inner shell 6 is fixedly arranged in the ionization chamber body 1, in order to enable the air to be bombarded by high-energy photons, when the gas molecules with ionization energy less than or equal to ultraviolet energy absorb a photon, ionization is carried out to generate positively charged ions and electrons, and the electrons are in the ionization chamber, the ions and the electrons are accelerated by an external electric field and rapidly move towards the metal electrode, so that a micro-current signal related to the concentration of an object to be detected is formed, an ultraviolet lamp 7 is fixedly arranged at the upper part of one end of the ionization chamber body 1, the ultraviolet lamp 7 penetrates through the upper surface of the inner shell 6, in order to enable the ions to realize collection and current detection, an ion collecting electrode 8 is fixedly arranged at the upper part of the ionization chamber body 1, the ion collecting electrode 8 penetrates through the upper surface of the inner shell 6, an electric field bias electrode 9 is fixedly connected at the bottom of the ionization chamber body 1, the electric field bias electrode 9 penetrates through the bottom surface of the inner shell 6, a reference electrode 10 is arranged at the upper part of the electric field bias electrode 9, the reference electrode 10 is fixed at the bottom of the inner shell 6, the reference electrode 10 is usually an analog power ground GND or a stable small voltage, and the position of, also can be in the one side that is close to ultraviolet lamp 7, ion collecting electrode 8 and electric field bias electrode 9 mutual symmetry set up, and the electric field that ion collecting electrode 8 and electric field bias electrode 9 formed is perpendicular with interior casing 6, and can trade the regulation to ion collecting electrode 8 and electric field bias electrode 9's position, realizes the design flexibility.
According to fig. 1, an air inlet 4 is fixedly arranged at one end of an ionization chamber body 1, and the air inlet 4 penetrates through a first electric field plate 2 and is connected with one end of an inner shell 6 in an attaching manner; the realization is to the leading-in of air to the fixed gas vent 5 that is equipped with of the other end of ionization chamber body 1, the other end laminating that the exhaust hole runs through second electric field board 3 and interior casing 6 is connected, realizes the discharge to the air, prevents that ionization chamber body 1 is inside to form high-pressure phenomenon.
Referring to fig. 2-4, when the ion collecting electrode 8 and the electric field bias electrode 9 are electrically connected to the external power source 11, and when the electric field bias electrode 9 is connected to the positive electrode of the external power source 11, i.e., when the electric field bias electrode 9 is turned on with a positive voltage, positive ions are collected at the ion collecting electrode 8, and when the electric field bias electrode 9 is turned on with a negative voltage, negative ions are collected at the ion collecting electrode 8.
The working principle is as follows: in the first embodiment, when the sensor works, gas enters the inner shell 6 inside the ionization chamber body 1 through the gas inlet 4, the gas is ionized under the irradiation of the ultraviolet lamp 7, ionized ions and electrons are accelerated in an external electric field formed by the first electric field plate 2 and the second electric field plate 3 and rapidly move towards the metal electrode, so that a micro-current signal related to the concentration of the gas to be detected is formed, the positive voltage is applied to the electric field bias electrode 9 at the moment, positive ions are received by the ion collecting electrode 8, the direction of the generated micro-current is an outflow direction, and the current gas concentration is known through processing calculation on the size of the outflow current.
The ion collecting electrode 8 and the electric field bias electrode 9 can exchange positions, and the original analysis of gas concentration cannot be influenced; the electric field bias electrode 9 and the reference electrode 10 can be interchanged in position, and the analysis of the original gas concentration cannot be influenced.
In the second embodiment, when the sensor works, gas enters the inner shell 6 inside the ionization chamber body 1 through the gas inlet 4, the gas is ionized under the irradiation of the ultraviolet lamp 7, ionized ions and electrons are accelerated in an external electric field formed by the first electric field plate 2 and the second electric field plate 3 and rapidly move towards the metal electrode, so that a micro-current signal related to the concentration of the substance to be detected is formed, because a negative voltage is applied to the electric field bias electrode 9 at the moment, negative electrons are received by the ion collecting electrode 8, the direction of the generated micro-current is in an inflow direction, and the current gas concentration can be known through processing calculation on the size of the inflow current.
The ion collecting electrode 8 and the electric field bias electrode 9 can exchange positions, and the original analysis of gas concentration cannot be influenced; the electric field bias electrode 9 and the reference electrode 10 can be interchanged in position, and the analysis of the original gas concentration cannot be influenced.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. A photoionization ionization chamber device comprising an ionization chamber body (1), characterized in that: the ionization chamber comprises an ionization chamber body (1), wherein a first electric field plate (2) and a second electric field plate (3) are fixedly arranged at two ends of the ionization chamber body (1) respectively, an external electric field is formed by the first electric field plate (2) and the second electric field plate (3), an inner shell (6) is fixedly arranged in the ionization chamber body (1), an ultraviolet lamp (7) is fixedly arranged at the upper part of one end of the ionization chamber body (1), the ultraviolet lamp (7) penetrates through the upper surface of the inner shell (6), an ion collecting electrode (8) is fixedly arranged at the upper part of the ionization chamber body (1), the ion collecting electrode (8) penetrates through the upper surface of the inner shell (6), an electric field bias electrode (9) is fixedly connected to the bottom of the ionization chamber body (1), the electric field bias electrode (9) penetrates through the bottom surface of the inner shell (6), a reference electrode (10) is arranged at the upper part of the electric field bias, the reference electrode (10) is fixed at the bottom of the inner shell (6).
2. A photoionization ionization chamber device according to claim 1, wherein: the one end of ionization chamber body (1) is fixed and is equipped with air inlet (4), air inlet (4) run through first electric field board (2) and are connected with the one end laminating of interior casing (6).
3. A photoionization ionization chamber device according to claim 1, wherein: the other end of ionization chamber body (1) is fixed and is equipped with gas vent (5), the gas vent runs through second electric field board (3) and is connected with the other end laminating of interior casing (6).
4. A photoionization ionization chamber device according to claim 1, wherein: the first electric field plate (2) and the second electric field plate (3) are perpendicular to the inner shell (6), and an electric field formed by the first electric field plate (2) and the second electric field plate (3) is parallel to the inner shell (6).
5. A photoionization ionization chamber device according to claim 1, wherein: the ion collecting electrode (8) and the electric field bias electrode (9) are symmetrically arranged, and an electric field formed by the ion collecting electrode (8) and the electric field bias electrode (9) is vertical to the inner shell (6).
6. A photoionization ionization chamber device according to claim 2, wherein: the ion collecting electrode (8) and the electric field bias electrode (9) are electrically connected with an external power supply (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921520984.0U CN210572099U (en) | 2019-09-09 | 2019-09-09 | Photoionization ionization chamber device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921520984.0U CN210572099U (en) | 2019-09-09 | 2019-09-09 | Photoionization ionization chamber device |
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| CN210572099U true CN210572099U (en) | 2020-05-19 |
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| CN201921520984.0U Active CN210572099U (en) | 2019-09-09 | 2019-09-09 | Photoionization ionization chamber device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113340838A (en) * | 2021-06-10 | 2021-09-03 | 上海迈鸿传感器有限公司 | NDIR gas detection sensor optical path device |
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2019
- 2019-09-09 CN CN201921520984.0U patent/CN210572099U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113340838A (en) * | 2021-06-10 | 2021-09-03 | 上海迈鸿传感器有限公司 | NDIR gas detection sensor optical path device |
| CN113340838B (en) * | 2021-06-10 | 2023-01-10 | 上海迈鸿传感器有限公司 | NDIR gas detection sensor optical path device |
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