CN2283851Y - Smoke reaction type content of oxygen detecting device - Google Patents
Smoke reaction type content of oxygen detecting device Download PDFInfo
- Publication number
- CN2283851Y CN2283851Y CN 97200977 CN97200977U CN2283851Y CN 2283851 Y CN2283851 Y CN 2283851Y CN 97200977 CN97200977 CN 97200977 CN 97200977 U CN97200977 U CN 97200977U CN 2283851 Y CN2283851 Y CN 2283851Y
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- flue gas
- detecting element
- gas
- combustion
- reaction type
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Abstract
The utility model relates to a smoke reaction type content of oxygen detecting device, which comprises an electromagnetic valve, an actuating mechanism, a temperature relay, a detecting element, and a combustor. The primary air inlet of the combustor is connected with a section of a smoke gas reaction guide tube. The outlet of the guide tube is positioned at a passing point for combustion smoke gas. The detecting element is a thermoelectric couple, or an ion needle type, or a double metal sheet type, a temperature type, or a photoelectric sensor. When the ventilation of gas combustion is not good, the feedback of the smoke gas is excess. When oxygen lacks in the environment, flames are extinguishedat a designated oxygen lack point, and the electromagnetic valve is driven to close a combustion device. The utility model can effectively prevent that accidents appear because of the imperfect combustion of gas, with the advantages of high sensitivity to detect the extinguishing and oxygen lack of the combustion device.
Description
The utility model relates to the safety feature that a kind of gas appliance, particularly gas heater prevent flame-out and anoxic.
Existing gas appliance results in personal injury caused by an accident because of rough burning for preventing combustion gas, usually is provided with the safety feature that prevents flame-out and anoxic.The necessary condition of avoiding gas appliance to enter the rough burning state is to guarantee to provide fresh air to burner, therefore prevent that one of unburnt valid approach from being that the oxygen content pick-up unit that comprises detecting element, driving mechanism, temperature relay, detecting element, burner is installed on gas appliance, monitor the oxygen content of combustion air.The core of oxygen content pick-up unit is a special microburner, and it is that a front portion has fire hole, and there is the combustion gas right-angle bend of nozzle at the rear portion, and a primary air inlet is arranged near nozzle.But it is about 14% time marquis that conventional device has only when the oxygen content in the surrounding air, could detect sensitive.Yet the oxygen content in the surrounding air is lower than set point (be generally in 16%～19% more arbitrarily), will reduce because of fresh air, causes the combustion gas rough burning and accident occurs.Existing apparatus differs greatly apart from common required sensitivity, for the higher combustion gas of the overwhelming majority's burning raties such as artificial coal gas, also can't reach performance requirement in any case adjust parameters, thereby not possess practical value.
The purpose of this utility model provides a kind of flue gas reaction type oxygen content pick-up unit, improves the sensitivity of pick-up unit and the stability of flame combustion, to prevent the combustion gas rough burning personnel that the cause injures and deaths of poisoning.
The technical solution of the utility model is:
Flue gas reaction type oxygen content pick-up unit comprises driving mechanism, temperature relay, detecting element, burner, it is characterized in that: connect one section flue gas feedback conduit in the primary air porch of burner, conduit outlet is positioned at combustion product gases through the place.
Above-mentioned driving mechanism is a solenoid valve.
Above-mentioned detecting element is occasionally ion pin type, double-metal sheet type, temp. type or an electro-optical pickoff of thermoelectricity.
Flue gas reaction type oxygen content pick-up unit is installed on the gas heater, and the effect of flue gas feedback conduit is to add the hot flue gas that partial combustion produces in the primary air porch of burner.Because the burning rate of hydrogen is the highest in the coal gas, but it also is subjected to the influence of other component, when inert gas components such as adding carbon dioxide, nitrogen, can reduce the burning rate index of this kind inflammable gas significantly.Introducing an amount of flue gas feedback can make the burning rate of combustion gas descend about 30%, because the existing damping action of flue gas feedback conduit itself, flame can be more stable when making normal combustion, and unlikely generation tempering phenomenon, simultaneously by suitably adjusting parameter, can guarantee when airborne oxygen content any some between 16%～19%, to close burner.
Be example only below, its course of work is described with the water heater of manual control: when gas heater is in normal operating conditions, the flame heat thermopair of burner nozzle, and then drive solenoid valve and make it be held open state.Bad when taking a breath, the excessive feedback of flue gas, when causing environmental hypoxia, flame can specify the anoxic point extinguish, and electric thermo-couple temperature descends suddenly, makes closed electromagnetic valve.Owing to " have " and " nothing " is drive signal with flame, so also be applicable to other detecting element fully, as ion pin type, double-metal sheet type, temp. type and electro-optical pickoff etc.
The utility model has the advantages that: simple in structure, cost is low, the reliability height.Can use original small fire burner kept burning day and night, do not change its original thermal load, so failure rate be low, easy care.Do not influence gas heater original properties and production technology, do not influence its outward appearance yet.Can not only improve the sensitivity of oxygen detection greatly, and make the burning under the normal condition more stable, reach satisfied practical function.Can be widely used in all kinds of gas heaters and gas appliance.
Below in conjunction with embodiment the utility model is described in detail:
Fig. 1 is a structural representation of the present utility model.
Embodiment:
Flue gas reaction type oxygen content pick-up unit comprises magnetic valve driving mechanism 1, temperature relay 2, detecting element 3, burner 4, burner 4 is that a front portion has fire hole 6, there is the combustion gas right-angle bend of nozzle 5 at the rear portion, and a primary air inlet 7 is arranged near nozzle.Connect one section flue gas feedback conduit 8 at primary air 7 places that enter the mouth, conduit outlet is positioned at combustion product gases through the place.Its detecting element 3 is occasionally ion pin type, double-metal sheet type, temp. type or electro-optical pickoffs of thermoelectricity, and the internal diameter of flue gas feedback conduit 8 is 6-10mm, and pipe range is 10-25mm, and material is red copper or bright stainless steel pipe.
Claims (6)
1, a kind of flue gas reaction type oxygen content pick-up unit, comprise driving mechanism, temperature relay, detecting element, burner, it is characterized in that: connect one section flue gas feedback conduit in the primary air porch of burner, conduit outlet is positioned at combustion product gases through the place.
2, flue gas reaction type oxygen content pick-up unit according to claim 1, it is characterized in that: described driving mechanism is a solenoid valve.
3, flue gas reaction type oxygen content pick-up unit according to claim 1, it is characterized in that: described detecting element is a thermopair.
4, flue gas reaction type oxygen content pick-up unit according to claim 1, it is characterized in that: described detecting element is the ion needle sensor.
5, flue gas reaction type oxygen content pick-up unit according to claim 1, it is characterized in that: described detecting element is the double-metal sheet type sensor.
6, flue gas reaction type oxygen content pick-up unit according to claim 1, it is characterized in that: described detecting element is temp. type or electro-optical pickoff.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97200977 CN2283851Y (en) | 1997-01-31 | 1997-01-31 | Smoke reaction type content of oxygen detecting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97200977 CN2283851Y (en) | 1997-01-31 | 1997-01-31 | Smoke reaction type content of oxygen detecting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2283851Y true CN2283851Y (en) | 1998-06-10 |
Family
ID=33922510
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 97200977 Expired - Fee Related CN2283851Y (en) | 1997-01-31 | 1997-01-31 | Smoke reaction type content of oxygen detecting device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2283851Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101358743B (en) * | 2007-07-31 | 2010-05-26 | 深圳市贝来科技有限公司 | Gas sensing type anoxia protection arrangement |
-
1997
- 1997-01-31 CN CN 97200977 patent/CN2283851Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101358743B (en) * | 2007-07-31 | 2010-05-26 | 深圳市贝来科技有限公司 | Gas sensing type anoxia protection arrangement |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |