CN1699990A - Flame sensor - Google Patents
Flame sensor Download PDFInfo
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- CN1699990A CN1699990A CN 200410045329 CN200410045329A CN1699990A CN 1699990 A CN1699990 A CN 1699990A CN 200410045329 CN200410045329 CN 200410045329 CN 200410045329 A CN200410045329 A CN 200410045329A CN 1699990 A CN1699990 A CN 1699990A
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- flame
- unit
- protective seam
- ion
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Abstract
The invention provides a flame sensor which can prevent silicate gas of atmosphere becoming noxious pests commented on flame leading-in unit and can measure whether combustion apparatus is on normal burning condition. Flame sensor (11) has measuring rob (12) which is formed by heat resisting iron material and the front end of which becomes flame leading-in unit (12A) posited on the flame of combustion apparatus. Measuring rob (12) leads-in flame ion through flame leading-in unit (12A) and on the length direction of Measuring rob (12) flows over current. It posits protecting layer formed by honeycomb ceramic material and selective intercepting silicate gas of atmosphere on the flame leading-in unit (12A) of measuring rob (12). The protecting layer (17) permits flame ion through flame leading-in unit (12A) and intercepting silicate invasion to flame leading-in unit (12A).
Description
Technical field
The present invention relates to be attached to the stove of usefulness of for example warming oneself, in the combustion apparatus of fan heater or hot water supplier etc., can perform well in monitoring the flame sensor of the fired state of the fuel that constitutes by kerosene or rock gas etc.
Background technology
Generally, stove in heating usefulness, in the combustion apparatus of fan heater or hot water supplier etc. (hereinafter referred to as burner), be provided for monitoring the flame sensor (for example, please refer to patent documentation 1) of the fired state of kerosene, propane flammable gas or the rock gas etc. that become its fuel.
[patent documentation 1]
Japan puts down into 2 years 2-7455 patent gazettes of announcing
Have the test bar of the metal needle-like that is called flame rod according to the flame sensor of this prior art, the flame that the front of this test bar becomes in the flame that is configured in burner imports the unit.And by the flame that burner produces, a large amount of ions of generation as described below become blue flame (blue-flame) when being in the normal combustion state, and when rough burning, the ion generation reduces, and become redness or yellow flame (Huang Yan).
That is, when burner is in the normal combustion state, from this flame, produce ionic hydrocarbon (CH
+), hydrogen ion (H
+), carbon monoxide ion (CO
+) kation or the oxonium ion (O that wait
2-), hydroxide ion (OH
-) negative ion that waits, these ions are imported the unit from flame import above-mentioned test bar.
Therefore, the electric current that in test bar, is flowing and producing by above-mentioned ion, whether flame sensor is in normal fired state from electric current flow detection burner at this moment.Again, because when the burner malcombustion, above-mentioned ion generation reduces, so the electric current that flows through in the test bar reduces, can detect unusual fired state.
, in the flame sensor of above-mentioned prior art, the silicon that comprises in the atmosphere (Si) gas becomes poisons on the flame importing unit of thing attached to test bar, produces following such problem.
That is, we know that silicon gas is from the flooring material in room or be used for the volatilization such as hair spray of hair or diffuse to atmosphere.And these silicon gases become monox (SiO by dispersing in atmosphere
2) import on the unit attached to the flame of flame sensor.
And, monox (SiO at this moment
2) become silicon fiml and cover flame and import to form on the unit and poison thing, the iontophoresis flame that obstruction will produce from the flame of burner imports the unit, and blocks passing through of ion.
Therefore, exist flame sensor, because the electric current that flows through in the test bar reduces significantly, even if the worry that also detects mistakenly during the burner normal combustion as abnormal combustion, and reduce such problem as the reliability of flame sensor.
Summary of the invention
The present invention proposes in view of the problem of above-mentioned prior art, the purpose of this invention is to provide the silicon gas that can suppress in the atmosphere and become the murder by poisoning thing attached on the flame importing unit, stably detecting is normal combustion or abnormal combustion, and can improve the performance as sensor, the flame sensor of reliability.
In order to solve above-mentioned problem; the flame that the invention of scheme 1 has the flame sensor in being configured in the flame of combustion apparatus imports in the unit; setting imports the unit by allowing ion in the above-mentioned flame to penetrate into this flame, blocks the formation of the protective seam that the porous ceramic material of the blocking property of silicon of silicon (Si) gas that comprises in the atmosphere forms.
According to this formation, prevent that by being arranged on the protective seam that porous ceramic material that flame imports the unit constitutes, becoming the silicon gas that comprises in the atmosphere from invading the silicon trap that flame imports the unit, can suppress silicon fiml (murder by poisoning thing) and import on the unit attached to flame.And; because the ion that produces from the flame of burner sees through the protective seam that is made of the porous ceramic material; import flame and import the unit,, can improve its Performance And Reliability so can stably detect whether burning normally of combustion apparatus by flame sensor.
Again, the invention of scheme 2 has with aluminium oxide (Al
2O
3), calcium oxide (CaO), lanthana (La
2O
3), titanium dioxide (TiO
2), any porous ceramic material in the magnesium oxide (MgO) or mix the formation that forms protective seam more than or equal to 2 kinds porous ceramic material.
At this moment; form protective seam by the porous ceramic material of using any porous ceramic material in aluminium oxide, calcium oxide, lanthana, titanium dioxide, the magnesium oxide or mix more than or equal to 2 kinds; can improve as the function of blocking the silicon trap of silicon gas, can see through protective seam to the ion in the flame and compensate to flame importing unit.Again, also can bring into play rectified action, can improve the performance that detects ion ion.
Further, when according to the invention of scheme 3, protective seam covers flame with the thickness of 150～400 μ m and imports the unit, forms the porosity of 0.1～2cc/g.
At this moment, when the Film Thickness Ratio that makes protective seam when for example 150 μ m are thin, protective seam imports that the unit is peeled off and unstable from flame easily.On the other hand, when the Film Thickness Ratio 400 μ m that make protective seam are thick, owing to the excessive demand to quality causes high price.And; by making protective seam have the porosity of 0.1～2cc/g; for the kation of the ionic hydrocarbon that produces from the flame of combustion apparatus, hydrogen ion, carbon monoxide ion etc. or the negative ion of oxonium ion, hydroxide ion etc.; can in protective seam, form approximately emptying aperture (continuous air bubbles) more than or equal to 100 times; one side is guaranteed the function as the silicon trap, and one faces above-mentioned ion compensates through protective seam.
Description of drawings
Fig. 1 represents pie graph according to the flame sensor of example of the present invention with burner.
Fig. 2 is the figure of details that amplifies a part of cross section of the flame sensor in the presentation graphs 1.
Fig. 3 is the sectional view that amplifies the major part of the flame importing unit in the presentation graphs 1 with protective seam.
Fig. 4 is the characteristic figure of expression by the detected voltage signal of flame sensor.
Embodiment
Below, we describe flame sensor according to example of the present invention according to appended Fig. 1 in detail to Fig. 4.
Among the figure, the 1st, become the burner of combustion apparatus, this burner 1 for example constitutes the flame generating unit of petroleum fan well heater etc.And the fuel of the kerosene that burner 1 is supplied with through fuel passage (not drawing among the figure) by burning etc. produces flame 4 described later.
Again, in burner 1, the pedestal unit 2 of flame sensor 11 usefulness described later is set as shown in Figure 2, in this pedestal unit 2, is equipped with upper and lower and the mounting hole 2A of test bar 12 grades described later is installed to connecting ground.And, the test bar 12 of flame sensor 11 is fixed in the pedestal unit 2 in the state of the mounting hole 2A that is inserted through pedestal unit 2 with pressing plate 3 grades.
The 4th, the flame from burner 1 produces in this flame 4, as illustrative among Fig. 1, produces ionic hydrocarbon (CH
+), hydrogen ion (H
+), carbon monoxide ion (CO
+) kation 5 or the oxonium ion (O that wait
2-), hydroxide ion (OH
-) negative ion 6 that waits.And, these ions 5,6 are imported unit 12A from flame import test bar 12 described later.
The 11st, the flame sensor that adopts in this example, this flame sensor 11 are by by being bent to the test bar 12 that crank-like roughly or L word shape form by the metal spicule that the stable on heating iron material with electric conductivity etc. constitutes and being arranged on support described later 13 on test bar 12 1 sides (cardinal extremity one side) and splicing ear 14 etc. constitutes.
Again, test bar 12 has the formation that the opposite side that becomes front forms the flame importing unit 12A of crank-like extension, and this flame imports unit 12A and is configured in as shown in Figure 1 in the flame 4 of burner 1.And the test bar 12 that is made of conductive material flows through electric current by ion 5,6 length directions at test bar 12 that import from flame the unit 12A importing flame 4.
13 are arranged on test bar 12 1 side supports, and this support 13 is as being formed by the insulator with tubular that has step that electrical insulating property and stable on heating stupalith constitute, as shown in Figure 2, being installed in the outer circumferential side of test bar 12 with chimerism.And, support 13 is fixed in the mounting hole 2A of pedestal unit 2 with pressing plate 3 grades, therefore the state outstanding upward, support test bar 12 from pedestal unit 2.
14 are arranged on the splicing ear of the base end side of test bar 12, as shown in Figure 2 this splicing ear 14 are installed in the lower end side of the test bar 12 of the below that is positioned at pedestal unit 2.And splicing ear 14 makes test bar 12 be connected with control module 15 described later.
The 15th, become the control module of the control device that is connected with the test bar 12 of flame sensor 11 by splicing ear 14, this control module 15 for example, is made of microcomputer etc.And control module 15 built-in testing circuits (not drawing among the figure) etc. have the function that the electric current that will flow through detects as the illustrated voltage signal of Fig. 4 in test bar 12.
Again, as shown in Figure 1, between control module 15 and burner 1, connecting the battery 16 that becomes direct supply, powering to control module 15 by this battery 16.And control module 15 also has with the electric current (voltage signal shown in Fig. 4) that flows through in test bar 12 correspondingly controls the work of burner 1 and the function that stops.
That is, in burner 1, in the way of above-mentioned fuel passage, be provided with and make solenoid valve (not drawing among the figure) that fuel supplies with, stops etc.And, control module 15, (for example surpass reference value at voltage signal from test bar 12, the magnitude of voltage of 600mV shown in Fig. 4) during, make above-mentioned solenoid valve be held open state, when above-mentioned voltage signal is reduced to smaller or equal to reference value, make above-mentioned closed electromagnetic valve, stop (blocking) and supply with fuel.
The flame that 17 expressions are arranged on test bar 12 imports the protective seam among the unit 12A; this protective seam 17 is to be mapped to the outer circumferential side that flame imports unit 12A and to form by the porous ceramic material spinelle of the blocking property of silicon that will optionally block silicon (Si) gas that (capturing) for example comprise in the atmosphere is molten, imports the protective seam of unit 12A from outer side covers flame.
Here, as the porous ceramic material of raw-material the blocking property of silicon that constitutes protective seam 17, for example can enumerate aluminium oxide (Al
2O
3), calcium oxide (CaO), lanthana (La
2O
3), titanium dioxide (TiO
2), magnesium oxide (MgO) etc., can form protective seam 17 with any porous ceramic material in them.Also can form protective seam 17 with the porous ceramic material more than or equal to 2 kinds in the mixing above-mentioned material again.
Again, protective seam 17 has for example thickness of 150～400 μ m, preferably has the thickness of 200～350 μ m, covers flame and imports unit 12A.At this moment, when the Film Thickness Ratio of protective seam 17 when for example 150 μ m are thin, protective seam 17 imports that unit 12A peels off and unstable from flame easily.On the other hand, when the Film Thickness Ratio 400 μ m that make protective seam 17 are thick, owing to the excessive demand to quality causes high price.
And protective seam 17 has the porosity of 0.1～2cc/g, for example forms the emptying aperture of 0.1～2cc volume (volume) as continuous air bubbles in the stupalith of 1g.Therefore in protective seam 17, the above-mentioned ion 5,6 that produces for the flame 4 from burner 1 forms approximately emptying aperture more than or equal to 100 times of sizes as continuous air bubbles in inside.
And; protective seam 17; as illustrative among Fig. 3, one side is guaranteed the function as the silicon trap that blocks silicon gas molecule 18 (hereinafter referred to as silicon 18) intrusion flame importing unit 12A, and one side allows above-mentioned ion 5,6 to see through protective seam 17 and imports flame importing unit 12A.
At first, when with fuel supplied burner 1 such as kerosene and when lighting a fire, produce flame 4 from burner 1.And, in this flame 4, produce for example CH
+, H
+, CO
+Deng kation 5 or O
2-, OH
-Deng negative ion 6, these ions 5,6 are imported unit 12A from flame import in the test bar 12 of flame sensor 11.
And, in the test bar 12 of flame sensor 11, flow through electric current owing to import the ion 5,6 that unit 12A imports from flame, by control module 15 detect at this moment electric current as among Fig. 4 by illustrative voltage signals such as family curves 19,20.
At this moment, the flame 4 by burner 1 produces produces a large amount of ions 5,6 when being in the normal combustion state, form blue flame (blue-flame).Again, when the abnormal combustion of rough burning etc., the generation of ion 5,6 reduces significantly, forms red or yellow flame (Huang Yan).
And flame sensor 11 detects the electric current that flows through in the test bar 12 owing to these ions 5,6 in control module 15 1 sides, according to testing result at this moment, detects burner 1 and is in the normal combustion state or is in the abnormal combustion state.
, petroleum fan well heater of being provided with burner 1 etc. is placed in the high room of leakproofness as warming appliance.And, in such room, exhale silicon gas from flooring material.Also exhale silicon gas from hair spray of being used for hair etc. again.
As a result, the silicon gas that diffuses in the atmosphere also disperses around burner 1, exists for example to form by monox (SiO
2) silicon fiml that constitutes imports worry on the unit 12A attached to the flame of flame sensor 11.
And, when this silicon fiml become poison thing import attached to flame unit 12A around the time, the ion 5,6 that obstruction will produce from the flame 4 of burner 1 imports flames and imports unit 12A, and blocks passing through of ion 5,6.Therefore, the such occurrence features of the family curve 19 of the flame sensor of prior art shown in the pecked line among Fig. 4 worsen, even if also detect mistakenly as abnormal combustion during normal combustion.
Therefore; in this example; with optionally blocking the molten outer circumferential side that is mapped to flame importing unit 12A of porous ceramic material spinelle of the blocking property of silicon of the silicon gas that comprises in the atmosphere, form protective seam 17, this protective seam 17 imports unit 12A from outer side covers flame.
Therefore, be arranged on protective seam 17 that flame imports the outer circumferential side of unit 12A can as illustrative among Fig. 3, catch the silicon 18,18 that disperses in atmosphere ..., can prevent that these silicon 18 from becoming the murder by poisoning thing attached to around the flame importing unit 12A.
And the importing flames such as emptying aperture that the protective seam 17 that is made of the porous ceramic material allows to see through inside from the ion 5,6 that flame 4 produces import unit 12A, can compensate flowing through of this incoming current in the test bar 12 of flame sensor 11.
The result, flame sensor 11 according to this example, family curve 20 shown in solid line among Fig. 4 is such, for example can prevent that reference value about voltage signal is than 600mV when burner 1 normal combustion is low and causes characteristic degradation, can stably detect the fired state of burner 1.
That is, the family curve shown in Fig. 4 19,20 relatively imports the situation that on the unit 12A situation of protective seam 17 is not set and protective seam 17 is set at flame.And, in the situation of the family curve 19 that does not have protective seam 17, when import at flame unit 12A around when adding the silicon of 0.1g for example, voltage signal drops to about 200mV significantly in time T 1, the time T 2 after this also only is returned to about 300mV.
Relative therewith, on flame imports unit 12A, be provided with in the situation of family curve 20 of protective seam 17, flame import unit 12A around add in the time T 1 of the silicon of 0.1g for example, voltage signal can not drop to below the 700mV.And in the time T 2 after end adding silicon, affirmation can make and detect characteristic and be returned to voltage level near 1000mV.
Thereby; if according to this example; then the outer circumferential side setting by importing unit 12A at flame with molten shooting method etc. is by the protective seam 17 that the porous ceramic material of blocking property of silicon constitutes, and can suppress silicon gas in the atmosphere becomes and poison thing and import on the unit 12A attached to flame.
And the flame 4 that can stably detect burner 1 by this flame sensor 11 is normal combustion or abnormal combustion, can positively improve the Performance And Reliability as flame sensor 11, and also can improve its permanance and life-span.
Again; form protective seam 17 by porous ceramic material with above-mentioned aluminium oxide, calcium oxide, lanthana, titanium dioxide, magnesium oxide etc.; can improve as the function of blocking the silicon trap of silicon gas; also can bring into play rectified action, can positively improve the performance that detects ion 5,6 ion 5,6.
Again; because protective seam 17 forms the thickness of 150～400 μ m; preferably form the thickness of 200～350 μ m; so the flame that protective seam 17 is bonded in well be made of stable on heating iron material etc. imports on the lateral surface of unit 12A, can suppress protective seam 17 and import unit 12A from flame and peel off.
And the thickness by making protective seam 17 can prevent that smaller or equal to 400 μ m the thickness of protective seam 17 is blocked up, can reduce fee of material, forms excellent protection layer 17.
In addition, in above-mentioned example, we for example understand the situation of setting up flame sensor 11 in the burner 1 of petroleum fan well heater etc.But, the invention is not restricted to this, for example the present invention also can be applicable to for example warming appliance or gas stove, the hot water supplier etc. of petroleum furnace, gas stove, coal gas fan heater etc.
Claims (3)
1. flame sensor; the flame that has in the flame that is configured in combustion apparatus imports the unit; fired state according to the above-mentioned combustion apparatus of ion detection that produces from above-mentioned flame is characterized in that: import to be provided with in the unit by allowing ion in the above-mentioned flame to import unit towards this flame at above-mentioned flame and see through, block the protective seam that the porous ceramic material of the blocking property of silicon of the silicon gas that comprises in the atmosphere forms.
2. flame sensor according to claim 1 is characterized in that: above-mentioned protective seam is to form with any porous ceramic material in the aluminium oxide, calcium oxide, lanthana, titanium dioxide, magnesium oxide or the porous ceramic material that mixes more than or equal to 2 kinds.
3. flame sensor according to claim 1 and 2 is characterized in that: above-mentioned protective seam covers above-mentioned flame importing unit with the thickness of 150～400 μ m, and its porosity is 0.1～2cc/g.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410045329 CN1699990A (en) | 2004-05-20 | 2004-05-20 | Flame sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410045329 CN1699990A (en) | 2004-05-20 | 2004-05-20 | Flame sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1699990A true CN1699990A (en) | 2005-11-23 |
Family
ID=35476136
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200410045329 Pending CN1699990A (en) | 2004-05-20 | 2004-05-20 | Flame sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1699990A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102221420A (en) * | 2010-04-16 | 2011-10-19 | 上海森太克汽车电子有限公司 | Linear flame temperature sensor |
| CN109253467A (en) * | 2017-07-12 | 2019-01-22 | 林内株式会社 | flame rod |
| US20210302069A1 (en) * | 2020-03-26 | 2021-09-30 | Johnson Controls Technology Company | Hvac system flame sensor |
-
2004
- 2004-05-20 CN CN 200410045329 patent/CN1699990A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102221420A (en) * | 2010-04-16 | 2011-10-19 | 上海森太克汽车电子有限公司 | Linear flame temperature sensor |
| CN102221420B (en) * | 2010-04-16 | 2013-03-20 | 上海森太克汽车电子有限公司 | Linear flame temperature sensor |
| CN109253467A (en) * | 2017-07-12 | 2019-01-22 | 林内株式会社 | flame rod |
| CN109253467B (en) * | 2017-07-12 | 2021-12-03 | 林内株式会社 | Flame rod |
| US20210302069A1 (en) * | 2020-03-26 | 2021-09-30 | Johnson Controls Technology Company | Hvac system flame sensor |
| US11635232B2 (en) * | 2020-03-26 | 2023-04-25 | Johnson Controls Tyco IP Holdings LLP | HVAC system flame sensor |
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |