CN107435954A - Gas stove - Google Patents
Gas stove Download PDFInfo
- Publication number
- CN107435954A CN107435954A CN201710384142.6A CN201710384142A CN107435954A CN 107435954 A CN107435954 A CN 107435954A CN 201710384142 A CN201710384142 A CN 201710384142A CN 107435954 A CN107435954 A CN 107435954A
- Authority
- CN
- China
- Prior art keywords
- temperature
- cover
- tempering
- mixing tube
- gas
- Prior art date
- 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.)
- Granted
Links
- 238000005496 tempering Methods 0.000 claims abstract description 115
- 239000007789 gas Substances 0.000 claims description 106
- 239000002737 fuel gas Substances 0.000 claims description 36
- 230000001174 ascending effect Effects 0.000 claims description 29
- 238000005259 measurement Methods 0.000 claims description 16
- 239000000463 material Substances 0.000 claims description 4
- 238000012546 transfer Methods 0.000 claims description 4
- 230000000630 rising effect Effects 0.000 claims description 2
- 238000001514 detection method Methods 0.000 abstract description 26
- 238000002485 combustion reaction Methods 0.000 description 23
- 238000012545 processing Methods 0.000 description 18
- 238000000034 method Methods 0.000 description 16
- 239000007921 spray Substances 0.000 description 16
- 238000010438 heat treatment Methods 0.000 description 13
- 230000002159 abnormal effect Effects 0.000 description 9
- 238000005070 sampling Methods 0.000 description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 239000004411 aluminium Substances 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 238000004904 shortening Methods 0.000 description 2
- 235000014347 soups Nutrition 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- 108091064702 1 family Proteins 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 238000010009 beating Methods 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010411 cooking Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000012958 reprocessing Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000005619 thermoelectricity Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
- F24C3/00—Stoves or ranges for gaseous fuels
- F24C3/08—Arrangement or mounting of burners
- F24C3/085—Arrangement or mounting of burners on ranges
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
- F24C3/00—Stoves or ranges for gaseous fuels
- F24C3/12—Arrangement or mounting of control or safety devices
- F24C3/126—Arrangement or mounting of control or safety devices on ranges
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Combustion (AREA)
- Gas Burners (AREA)
Abstract
The invention provides a gas stove which can detect a backfire with a small temperature rise by using a temperature sensor and can inhibit error detection. A cover for covering a mixing pipe of a burner of a stove is provided, and the temperature inside the stove is measured by a temperature sensor attached to the cover. Periodically, the rise of the measured temperature within a predetermined judgment time width is acquired, and the tempering is detected when the rise exceeds a tempering threshold. The tempering threshold is set according to the temperature of the inside of the hood. In this way, by changing the tempering threshold, it is possible to detect tempering based on the rise amount exceeding the tempering threshold, not only when tempering occurs in a state where the temperature inside the cover is low and the rise amount of the measured temperature is large, but also when tempering occurs in a state where the temperature inside the cover is hot and the rise amount of the measured temperature is small. Further, since the tempering threshold in the state where the temperature inside the cover is low can be set to be larger than the tempering threshold in the heated state, erroneous detection can be suppressed.
Description
Technical field
The present invention relates to a kind of temperature possessed for detecting the abnormal combustion of the fuel gas supplied to furnace combustor
The gas furnace of sensor.
Background technology
It is wide by the gas furnace for making fuel gas be burnt in furnace combustor to be heated to cooking-vessels such as pots
Popularize generally.Furnace combustor includes the burner body with multiple burners and the mixing being extended from burner body
Pipe.The fuel gas supplied by gas passage is injected into the openend of the upstream side of mixing tube from nozzle, is burnt in suction
Mixing tube is flowed into while primary air.Then, the fuel gas of mixing tube and the mixed gas of primary air have been passed through
Sprayed from burner, when passing through plug ignition, the mixed gas starts burning and forms flame in the outside of burner.
In such furnace combustor, the abnormal combustion for the fuel gas being supplied to sometimes.Such as exist following
Situation：When adjusting the firepower of (decrease) furnace combustor, if burning velocity is faster than the spouting velocity of mixed gas, flame
The inside of furnace combustor is slipped into from burner, produces the phenomenon to be burnt away from the fuel gas of nozzle injection in mixing tube
(being hereinafter referred to as tempered).It additionally, there are situations below：When due to overflowing soup etc. and blocked burner from cooking-vessel, combustion
Expect that gas leaks from the open end side of mixing tube, because the fuel gas of the leakage ignites and produce flame in gas furnace
The phenomenon (hereinafter referred to as inverse spray) of portion's diffusion.
Therefore, in order to detect tempering, inverse spray, and the adjacent open end proposed in mixing tube sets the side of thermocouple in advance
Case (patent document 1).When tempering, inverse spray occurs, thermocouple is heated to generate electromotive force, therefore, electronic by using this
Gesture closes the gas shut-off valve of gas passage, can stop abnormal combustion.It additionally, there are and replace thermoelectricity temperature in use biography occasionally
The situation of sensor.Temperature rise in the fixed time width of monitoring in advance, exceedes threshold value according to the temperature rise and detects
Generation abnormal combustion, and close the control of the gas shut-off valve of gas passage.
Prior art literature
Patent document
Patent document 1：Japanese Unexamined Patent Publication 2003-28428 publications
The content of the invention
Problems to be solved by the invention
But detected in above-mentioned temperature in use sensor like that in the gas furnace of the abnormal combustion of fuel gas, when
When the quantity delivered of fuel gas is set less (firepower of furnace combustor is smaller), exists and be difficult to detect by as tempering
Problem.The reason for this is due to following.First, tempering is produced even in the inside of mixing tube, with being produced from the openend of mixing tube
Raw inverse spray is compared, and the temperature rise measured using the temperature sensor located at the outside of mixing tube is smaller.Also, tempering is not
Only after being lighted a fire to furnace combustor soon, the peripheral temperature of mixing tube it is relatively low in the state of occur, also mixing
The periphery of pipe occurs as furnace combustor burns away in the state of heating, therefore, especially in heating in the state of send out
During raw tempering, temperature rise can be made further to diminish and be difficult to detect by being tempered.
The present invention is the above mentioned problem in the conventional technology of reply and completes, its object is to, there is provided one kind can make
The less tempering of temperature rise is detected with temperature sensor and can suppress the gas furnace of error detection.
The solution used to solve the problem
Above-mentioned in order to solve the problems, such as, gas furnace of the invention employs following structure.That is, a kind of gas furnace,
The stove of its mixing tube for being equipped with including the burner body with multiple burners and being extended from the burner body fires
Burner, when being injected into the openend of the mixing tube from nozzle by the fuel gas that gas passage supplies, from the opening
The mixed gas of the fuel gas and primary air that flow into is held to be sprayed via the mixing tube from the burner, the gas furnace
Tool is characterised by that the gas furnace includes：Cover, it covers the mixing tube, and the openend is contained in into inner side；Temperature passes
Sensor, it is installed on the cover, can measure the temperature of the inner side of the cover；Judging unit, it periodically obtains the temperature
Ascending amount of the measurement temperature of sensor in defined judgement time width, and judge whether the ascending amount has exceeded defined tempering
Threshold value；Gas cutting unit, should in the case where being judged as that the ascending amount has exceeded the tempering threshold by the judging unit
Gas cutting unit cuts off the supply of the fuel gas；And judgment standard setup unit, it is according to the inner side of the cover
Temperature sets the tempering threshold value.
In such gas furnace of the invention, tempering threshold value is changed by the temperature of the inner side according to cover, not only
Can it is not waited so long after being lighted a fire to furnace combustor, cover inner side temperature it is relatively low in the state of be tempered and
When the ascending amount of measurement temperature is larger, tempering threshold value can be exceeded according to the ascending amount and detect to be tempered, Er Qie
The inner side of cover is as furnace combustor burns away and is tempered in the state of heating and the ascending amount of measurement temperature is smaller
When, it also can exceed tempering threshold value according to the ascending amount and detect to be tempered.
Further, since the tempering threshold value in the state of the temperature of the inner side of cover is relatively low can be set greater than in cover
Tempering threshold value in the state of the heating of side, though therefore it can suppress not occur the ascending amount of tempering measurement temperature more than tempering threshold
It is worth and is judged as that there occurs error detection as tempering.
Or, the temperature setting not only according to the inner side of cover is tempered threshold value in the gas furnace of the invention described above,
Temperature setting always according to the inner side of cover judges time width.
When being tempered in the state of the temperature in the inner side of cover is relatively low, measurement temperature can be with the tempering significantly
Rise, the time is needed for accurately holding the ascending amount, on the other hand, is occurred back in the state of the inner side heating in cover
When fiery, measurement temperature can restrain and turn into the state being saturated at once with the ascensional range of the tempering.Therefore, by according to cover
The temperature of inner side change judgement time width, in the state of the temperature of the inner side of cover is relatively low, it can be ensured that sufficiently precise to
The judgement time width for the ascending amount that measurement temperature rises with tempering is held, ascending amount during by making the normal combustion not being tempered
Gap between ascending amount during with being tempered becomes big, can suppress error detection.In addition, the state of the inner side heating in cover
Under, judge time width by shortening, can quickly detect out and be tempered.
Alternatively, it is also possible to be, any one in the mixing tube and cover of such gas furnace of the invention is provided with logical
Cross and be in contact with any another one in mixing tube and cover and heat is transferred to the heat transfer part of cover from mixing tube.
So, when heating mixing tube because tempering occurs, the heat can be transferred to cover via heat transfer part, because
This, compared with the situation for being not provided with heat transfer part, can make with promptly temperature of the reflection to the inner side of cover of being generated heat caused by tempering
Spend in (measurement temperature of temperature sensor).As a result, using the temperature sensor for being installed on cover, inverse spray can not only be improved
Accuracy of detection, additionally it is possible to improve the accuracy of detection of tempering.
In addition, or, utilize heat conduction system of the thermal conductivity factor more than mixing tube in the gas furnace of the invention described above
Several material forms cover.
So, with using compared with situation of the mixing tube identical material to form cover, thermal conductivity is improved, easily
By with the temperature of the inner side of exothermic reaction caused by tempering to cover, thus, it is easy to the measurement temperature based on temperature sensor
Ascending amount detect to be tempered.
Brief description of the drawings
Fig. 1 is the stereogram of the outward appearance for the gas furnace 1 for representing the present embodiment.
Fig. 2 is the stereogram for representing to be equipped on the furnace combustor 4 of gas furnace 1.
Fig. 3 is the stereogram for the cover 30 for representing the present embodiment.
Fig. 4 is to represent the explanation figure in the example of the abnormal combustion of fuel gas caused by furnace combustor 4.
Fig. 5 be represent to be detected in auxiliary burner mixing tube 19 according to the ascending amount of case temperature caused by the example that is tempered
Explanation figure.
Fig. 6 is the flow chart of the tempering detection process performed by the control unit 50 of the present embodiment.
Fig. 7 is the flow chart of the judgment standard setting processing performed in detection process is tempered.
Fig. 8 is to represent to detect whether to mix in auxiliary burner in the gas furnace 1 of the present embodiment according to tempering detection process
Close the explanation figure for the example that pipe 19 is tempered.
Fig. 9 is to represent to detect whether to be tempered in auxiliary burner mixing tube 19 in the gas furnace 1 of the 1st variation
The explanation figure of example.
Figure 10 is to change the explanation figure being broadly compared when judging to the temperature rise Δ T of case temperature.
Figure 11 is the flow chart of the judgment standard setting processing performed by the control unit 50 of the 2nd variation.
Description of reference numerals
1st, gas furnace；2nd, stove body；3rd, top plate；4th, furnace combustor；5th, range；6th, operation knob；10th, burn
Device main body；11st, main burner portion；12nd, auxiliary burner portion；13rd, body of heater；14th, main burner head；15th, auxiliary burner head detached；
16th, main burner burner；17th, auxiliary burner burner；18th, main burner mixing tube；19th, auxiliary burner mixing tube；20th, air is adjusted
Regulating device；21st, conditioner；22nd, air inflow aperture；23rd, air inflow aperture；24th, mounting portion；25th, mounting portion；26th, it is main
Burner gas pipe arrangement；27th, auxiliary burner gas pipe；27a, nozzle；30th, cover；31st, fixed screw；32nd, temperature sensor；
40th, gas source pipe arrangement；41st, gas shut-off valve；42nd, flow control valve；50th, control unit.
Embodiment
Fig. 1 is the stereogram of the outward appearance for the gas furnace 1 for representing the present embodiment.The gas furnace 1 of the present embodiment includes：Stove
Has main body 2, it is formed as the relatively thin box shape of upper surface side opening；Top plate 3, it is positioned in stove body 2 and covers stove
Has the upper surface of main body 2；Furnace combustor 4R, 4L, it is set by top self-forming in a manner of the through hole of top plate 3 protrudes；With
And range 5R, 5L, it is arranged on the upper surface of top plate 3 around furnace combustor 4R, 4L and held for placing the cookings such as pot
Device.
In addition, on top plate 3, operation knob 6R, 6L are respectively correspondingly provided with furnace combustor 4R, 4L, the operation
Knob 6R, 6L be used for igniting when, firepower regulation when etc. operated by user.Pressed downwards and edge when by operation knob 6R, 6L
During prescribed direction (in the present embodiment for counterclockwise) rotation, fuel gas is supplied to furnace combustor 4R, 4L, and utilize
Spark plug (not shown) is lighted a fire.Afterwards, when changing operation knob 6R, 6L anglec of rotation, the quantity delivered of fuel gas
It is changed, so as to adjust furnace combustor 4R, 4L firepower.In addition, furnace combustor 4R and left side on right side
Furnace combustor 4L, both structures, shape are essentially identical, therefore, below, if It is not necessary to especially distinguishing right side and a left side
Side, then only it is expressed as furnace combustor 4.
Fig. 2 is the stereogram for representing to be equipped on the furnace combustor 4 of gas furnace 1.As illustrated, the present embodiment
Furnace combustor 4 is that possess the main burner portion 11 of toroidal and configure in the auxiliary burner portion of the inner side in main burner portion 11
So-called main and side burner (the Japanese of 12 duplex：Pro バ ー Na).Form main burner portion 11 and auxiliary burner portion 12
Burner body 10 possess the auxiliary burner head detached 15 of body of heater 13, the main burner head 14 of toroidal and toroidal
Deng, wherein, main burner mixing chamber of the body of heater 13 formed with toroidal (not shown), auxiliary burner mixing chamber, main burner
Head 14 covers the upper opening of main burner mixing chamber and is placed in body of heater 13, and auxiliary burner head detached 15 covers auxiliary burner and mixed
Close the upper opening of room and be placed in body of heater 13.
In the lower surface of the periphery wall of main burner head 14 (face for being placed in body of heater 13), relative to main burner head
14 center is radially formed with multiple grooves (burner groove), when main burner head 14 is placed in into body of heater 13, by more
The upper surface of individual burner groove and body of heater 13 forms the multiple main burner burners 16 connected with main burner mixing chamber.Similarly,
In the lower surface of the periphery wall of auxiliary burner head detached 15, relative to the center of auxiliary burner head detached 15 radially formed with more
Individual burner groove, when auxiliary burner head detached 15 is placed in into body of heater 13, by the upper surface of multiple burner grooves and body of heater 13 formed with
Multiple auxiliary burner burners 17 of auxiliary burner mixing chamber connection.
In addition, being extended from body of heater 13 has the main burner mixing tube 18 connected with main burner mixing chamber and is fired with pair
The auxiliary burner mixing tube 19 of burner mixing chamber connection.The main burner mixing tube 18 and auxiliary burner mixing tube 19 of the present embodiment
It is integrally formed by using the casting that iron is carried out with body of heater 13.In main burner mixing tube 18 and the opposite side of body of heater 13
Openend be provided with conditioner 20, the aperture of mouth 22 can be regulated air flow into.Pass through main burner gas pipe
The fuel gas of 26 supplies burns when being injected into the openend of main burner mixing tube 18 being sucked from air inflow aperture 22
Main burner mixing tube 18 is flowed into while primary air.Moreover, the fuel gas of main burner mixing tube 18 is passed through
Main burner mixing chamber is fed into the mixed gas of primary air and is sprayed from main burner burner 16, therefore, when by not
When the spark plug of diagram sends spark, start the burning of mixed gas and form flame in the outside of main burner burner 16.
Similarly, auxiliary burner mixing tube 19 and the openend of body of heater 13 opposite side are provided with conditioner
21, the aperture of mouth 23 can be regulated air flow into.In addition, auxiliary burner mixing tube 19 is shorter than main burner mixing tube 18, pair combustion
The openend of burner mixing tube 19 leans on the position of the side of body of heater 13 positioned at the openend than main burner mixing tube 18.Burnt by pair
The fuel gas that device gas pipe 27 supplies is when being injected into the openend of auxiliary burner mixing tube 19, and from air inflow aperture
The primary air of 23 suctions together flows into auxiliary burner mixing tube 19, and the mixed gas for having passed through auxiliary burner mixing tube 19 is passed through
Auxiliary burner mixing chamber and sprayed from auxiliary burner burner 17.The present embodiment main burner head 14 formed with (not shown)
Prolong burning slit, prolong burning slit via this and prolong burning from the lateral side of auxiliary burner portion 12 in main burner portion 11, thus burnt in pair
Device portion 12 starts the burning of mixed gas and forms flame in the outside of auxiliary burner burner 17.
Also, covering main burner mixing tube 18 and auxiliary burner mixing tube are provided with the gas furnace 1 of the present embodiment
19 cover 30.Fig. 3 is the stereogram for the cover 30 for representing the present embodiment.First, the state before installation is shown in Fig. 3 (a)
Under cover 30.Panel beating (the Japanese that cover 30 is carried out by using aluminium flat board：Sheet metal is processed) by the substantially rectangular of aluminium flat board
The left and right ends of upper surface part bend downwards and form left and right sides face and by the substantially rectangular upper surface of aluminium flat board
The front-end and back-end in portion are also bent downwards so as to be formed as surrounding the box-like of surrounding.
On the other hand, it is arranged on the present embodiment in a manner of protruding upward respectively for the mounting portion 24,25 that cover 30 loads
Main burner mixing tube 18 and auxiliary burner mixing tube 19 on, the upper end of mounting portion 24,25 is formed as flat.Loaded in cover 30
In the state of the mounting portion 24 of main burner mixing tube 18 and the mounting portion 25 of auxiliary burner mixing tube 19, in the upper table of cover 30
Face is fixed using the fastening of fixed screw 31.In addition, the mounting portion 24,25 of the present embodiment corresponds to " passing for the present invention
Hot portion ".
The state after mounting cup 30 is shown in Fig. 3 (b).In addition, in figure, in order to see that main burner mixes
Pipe 18 and auxiliary burner mixing tube 19 are closed, and passes through 30 ground of cover and cover 30 is represented by dashed line.As illustrated, main burner mixing tube
18 openend and the openend of auxiliary burner mixing tube 19 are configured at the inner side of cover 30.In addition, use is installed on cover 30
In the temperature sensor 32 of the temperature of measurement inner side, the temperature sensor 32 of the present embodiment has used change of the resistance according to temperature
And the thermistor changed.In the example in the figures, the top of temperature sensor 32 mixes through cover 30 by auxiliary burner
The side surface part of pipe 19, outside of the top close to the openend of auxiliary burner mixing tube 19.
In furnace combustor 4 described above, the abnormal combustion for the fuel gas being supplied to sometimes.Fig. 4 is table
Show the explanation figure in the example of the abnormal combustion of fuel gas caused by furnace combustor 4.In figure, show with the face of level
The section that cutting auxiliary burner mixing tube 19 obtains.In addition, for the section of main burner mixing tube 18, diagram is eliminated, but
Its essential structure is identical with auxiliary burner mixing tube 19.As described above, burnt by auxiliary burner gas pipe 27 to pair
Device mixing tube 19 supplies fuel gas, and the auxiliary burner gas pipe 27 and main burner gas pipe 26 are from one in upstream side
What root gas source pipe arrangement 40 was branched off.
Gas source pipe arrangement 40 be provided with gas shut-off valve 41 for gas source pipe arrangement 40 to be opened and closed and for pair
The flow control valve 42 being adjusted by the flow of the fuel gas of gas source pipe arrangement 40.Gas shut-off valve 41 and control unit 50
Electrical connection, opening and closing is controlled by control unit 50.Flow control valve 42 is connected via axle (not shown) with the operation knob 6 on top plate 3,
The flow of fuel gas is adjusted according to the rotation of operation knob 6, so that the firepower change of furnace combustor 4.In addition, at this
In embodiment, main burner gas pipe 26, auxiliary burner gas pipe 27 and gas source pipe arrangement 40 correspond to the present invention's
" gas passage ".
When opening gas shut-off valve 41 and flow control valve 42 to the supply fuel gas of auxiliary burner gas pipe 27, combustion
Material gas is injected into the openend of auxiliary burner mixing tube 19 from the nozzle 27a on the top of auxiliary burner gas pipe 27, and
With together with the primary air flowed into from air inflow aperture 23 while by auxiliary burner mixing tube 19 while mixing.Moreover, pass through
The mixed gas sprayed via auxiliary burner mixing chamber from auxiliary burner burner 17 is lighted a fire and in auxiliary burner burner 17
Outside formed flame burning be normally to burn.In addition, similarly, the fuel gas supplied to main burner gas pipe 26
Body is injected into the openend of main burner mixing tube 18, but the quantity delivered of the fuel gas supplied to main burner mixing tube 18
It is set to be more than the quantity delivered of the fuel gas supplied to auxiliary burner mixing tube 19.
On the other hand, situations below be present：When due to overflowing soup etc. from the cooking-vessel that is positioned on range 5
When auxiliary burner burner 17 is blocked, because mixed gas can not spray from auxiliary burner burner 17, therefore from auxiliary burner gas
The fuel gas that the nozzle 27a of body pipe arrangement 27 is ejected leaks from air inflow aperture 23, when the fuel gas of the leakage is ignited
When, as shown in Fig. 4 (a), produce the phenomenon (hereinafter referred to as inverse spray) to be jetted out flames from air inflow aperture 23.In addition, inverse spray is not
Only produce in the air inflow aperture 23 of auxiliary burner mixing tube 19, when main burner burner 16 is blocked, mixed in main burner
The air inflow aperture 22 for closing pipe 18 is also possible to similarly produce.As described above, the openend of main burner mixing tube 18 and
The openend of auxiliary burner mixing tube 19 is configured in the inner side of cover 30, and the heat of the flame spread because inverse spray occurs is vexed in cover
30 inner side, therefore, temperature sensor 32 are sharp heated.Control unit 50 electrically connects with temperature sensor 32, being capable of basis
The measurement temperature of temperature sensor 32 detects to occur inverse spray.Also, control unit 50 passes through pass when detecting to occur inverse spray
Gas shut-off valve 41 is closed forcibly to stop working.
It additionally, there are situations below：When carrying out the firepower regulation of furnace combustor 4, the spouting velocity of mixed gas is low
When burning velocity, auxiliary burner head detached 15 obliquely load relative to body of heater 13, flame slips into stove from auxiliary burner burner 17
Have the inside of burner 4, the fuel from the nozzle 27a injections of auxiliary burner gas pipe 27 is produced as shown in Fig. 4 (b)
The phenomenon (being hereinafter referred to as tempered) of gas burning in auxiliary burner mixing tube 19.Especially, in the more gas of such as hydrogen composition
In the faster fuel gas of such burning velocity, tempering is easily produced.In addition, tempering is not limited to produce in auxiliary burner mixing tube 19
It is raw, it is also possible to similarly produce in main burner mixing tube 18.Also, once it is tempered, burning is maintained to stopping combustion
Untill the supply for expecting gas, main burner mixing tube 18, auxiliary burner mixing tube 19 are heated, and therefore, covering main burner mixes
The temperature (hereinafter referred to as case temperature) for closing the inner side of the cover 30 of pipe 18 and auxiliary burner mixing tube 19 rises.Control unit 50 ought be such as
It is aftermentioned when detecting to be tempered according to the ascending amount of the measurement temperature of temperature sensor 32 like that, by closing gas shut-off valve
41 forcibly stop working.
As described above, in the gas furnace 1 of the present embodiment, mounting portion 24 is provided with main burner mixing tube 18,
Auxiliary burner mixing tube is provided with mounting portion 25, and cover 30 is fixed in mounting (contact) in the state of mounting portion 24,25.Therefore,
When because tempering occurs and when main burner mixing tube 18, auxiliary burner mixing tube 19 are heated, the heat can via mounting portion 24,
25 are transferred to cover 30.Thus, compared with being not provided with the situation of mounting portion 24,25, can make rapid with being generated heat caused by tempering
Ground reflection is on case temperature (measurement temperature of temperature sensor 32), using the temperature sensor 32 on cover 30, no
Only it is capable of detecting when that inverse spray occurs, additionally it is possible to detect to be tempered.Especially, for auxiliary burner mixing tube 19, with main combustion
Burner mixing tube 18 is compared, and the quantity delivered of fuel gas is less, and therefore, caloric value during tempering is also less, exists and is difficult to detect
Go out the tendency being tempered, but by making mounting portion 25 be contacted with cover 30 and transmitting heat to cover 30, can make to pass using temperature
The ascending amount increase for the temperature that sensor 32 measures, so as to detect to be tempered in auxiliary burner mixing tube 19.
In addition, the cover 30 of the present embodiment is by aluminium flat board (thermal conductivity factor：236W/ (mK)) formed, mixed with auxiliary burner
Close pipe 19, main burner mixing tube 18 similarly utilizes iron (thermal conductivity factor：84W/ (mK)) compared to form the situation of cover 30,
It can seek to improve thermal conductivity, therefore, easily be detected back according to the ascending amount of the temperature measured using temperature sensor 32
Fire.
In addition, in the gas furnace 1 of the present embodiment, set in main burner mixing tube 18 and auxiliary burner mixing tube 19
Mounting portion 24,25 simultaneously makes mounting portion 24,25 be in contact with cover 30 but it is also possible to be in contrast to this, being set in advance in the side of cover 30
The contact site for being respectively facing that main burner mixing tube 18 and auxiliary burner mixing tube 19 protrude is put, so that the contact site is contacted with master
It is fixed in advance that the state of burner mixing tube 18 and auxiliary burner mixing tube 19 will cover 30.
In addition, in the gas furnace 1 of the present embodiment, main burner mixing tube 18 is detected using 1 temperature sensor 32
With the inverse spray and tempering of both auxiliary burner mixing tubes 19, but multiple temperature sensors 32 can also be set.Such as can also
It is to be mixed using the temperature sensor 32 for the side surface part by the side of main burner mixing tube 18 for being installed on cover 30 to detect main burner
The inverse spray and tempering at pipe 18 are closed, uses the temperature sensor for the side surface part by the side of auxiliary burner mixing tube 19 for being installed on cover 30
32 detect the inverse spray and tempering at auxiliary burner mixing tube 19.On the other hand, 1 temperature is being utilized to pass as in this embodiment
Sensor 32 is come in the case of detecting both main burner mixing tube 18 and auxiliary burner mixing tube 19, by advance passing temperature
Sensor 32 is installed on the side surface part by the side of auxiliary burner mixing tube 19 of cover 30, and easy pair is returned compared with main burner mixing tube 18
Tempering at the less auxiliary burner mixing tube 19 of caloric value when fiery is detected.
Fig. 5 be represent to be detected in auxiliary burner mixing tube 19 according to the ascending amount of case temperature caused by the example that is tempered
Explanation figure.In Fig. 5 curve map, it is transverse axis to take the time, and it is the longitudinal axis to take temperature, is represented with single dotted broken line in furnace combustor
The change of case temperature in the case of 4 normally burnings, the feelings indicated by the solid line being tempered in auxiliary burner mixing tube 19
The change of case temperature under condition.In addition, case temperature is the temperature measured using temperature sensor 32.
First, shown in Fig. 5 (a) after being lighted a fire to furnace combustor 4 soon, the inner side of cover 30
The example being tempered under the relatively low state of temperature (such as 25 DEG C).In the state of the temperature of the inner side of cover 30 is relatively low,
When furnace combustor 4 normally burns, case temperature also can little by little rise because of the radiant heat from furnace combustor 4.With
This is relative, and in the case where auxiliary burner mixing tube 19 is there occurs tempering, auxiliary burner mixing tube 19 is heated, and thus makes covering
The temperature of the inner side of the cover 30 of auxiliary burner mixing tube 19 during normal combustion than being substantially increased.Therefore, case temperature is obtained solid
Temperature rise Δ T in fixed time width Δ t (such as 5 minutes), it can exceed what is predetermined according to temperature rise Δ T
Tempering threshold value (the big value of temperature rise during than normal combustion) and detect to be tempered in auxiliary burner mixing tube 19.
In addition, in Fig. 5 (a), as a comparison, it illustrate with dashed lines what is be tempered in main burner mixing tube 18
In the case of case temperature change.As described above, fuel gas quantity delivered than auxiliary burner mixing tube more than 19 master
In burner mixing tube 18, caloric value during tempering is more, and the ascending amount of case temperature is also larger, therefore, is mixed with auxiliary burner
Close pipe 19 to compare, easily detect to be tempered.
On the other hand, in Fig. 5 (b), show in the inner side of cover 30 as furnace combustor 4 burns away and heating
State (such as 80 DEG C) under the example that is tempered.The relatively low state phase with the temperature of the inner side of the cover 30 of Fig. 5 (a)
Than in the state of the inner side heating of cover 30, being tempered even in auxiliary burner mixing tube 19, case temperature is fixed
Temperature rise Δ T in time width Δ t is also smaller.Therefore, temperature rise Δ T is not above being tempered threshold value sometimes, so as to difficult
To detect the tempering at auxiliary burner mixing tube 19.If though being tempered threshold value in this way, reducing in advance, following feelings occur
Condition：In the state of the temperature of the inner side of cover 30 is relatively low, though it is not tempered, easily because temperature rise Δ T exceedes tempering
Threshold value and flase drop measures tempering.In addition, in Fig. 5 (b), the feelings to being tempered in main burner mixing tube 18 are eliminated
The diagram of condition, but because the temperature rise Δ T that case temperature rises with the tempering of auxiliary burner mixing tube 19 is less than in cover
The temperature rise Δ T that temperature rises with the tempering of main burner mixing tube 18, therefore, it is difficult to detect to be tempered.
Therefore, in the gas furnace 1 of the present embodiment, control unit 50 performs following such tempering detection process, so as to
It can not only detect be tempered caused by auxiliary burner mixing tube 19 in the state of the temperature of the inner side of cover 30 is relatively low, moreover it is possible to examine
Measure and be tempered in the state of the inner side heating of cover 30 caused by auxiliary burner mixing tube 19.
Fig. 6 is the flow chart of the tempering detection process performed by the control unit 50 of the present embodiment.Pass through the use of gas furnace 1
Family operates operation knob 6 and furnace combustor 4 is lighted a fire, so as to start the tempering detection process.In tempering detection process
In, first, the case temperature (step 100) during the igniting of furnace combustor 4 is measured using temperature sensor 32.Then, perform
The processing (hereinafter referred to as judgment standard setting processing) of the judgment standard of tempering is correspondingly set according to the case temperature measured.
Fig. 7 is the flow chart of the judgment standard setting processing performed in detection process is tempered.At judgment standard setting
In reason, first, it is determined that whether the case temperature measured by temperature sensor 32 is less than 80 DEG C of (steps 130).Then, it is warm in cover
(step 130 in the case that degree is less than 80 DEG C：It is), tempering threshold value is set as the 1st threshold value (being in the present embodiment 23 DEG C) (step
It is rapid 132).
On the other hand, (the step 130 in the case where case temperature is more than 80 DEG C：It is no), then judge that case temperature is
It is no to be less than 110 DEG C of (steps 134).Then, case temperature be 80 DEG C less than 110 DEG C in the case of (step 134：
It is), tempering threshold value is set as 2nd threshold value (be in the present embodiment 13 DEG C) (step 136) smaller than the 1st threshold value.
On the other hand, (the step 134 in the case where case temperature is more than 110 DEG C：It is no), tempering threshold value is set as comparing
The 3rd smaller threshold value of 2nd threshold value (being in the present embodiment 4 DEG C) (step 138).So correspondingly set according to case temperature
Surely it is tempered after threshold value, terminates Fig. 7 judgment standard setting processing and return to Fig. 6 tempering detection process.In addition, in this implementation
In, the control unit 50 that tempering threshold value is correspondingly set according to case temperature corresponds to " the judgment standard setting list of the present invention
Member ".
In detection process is tempered, when being returned from judgment standard setting processing (step 102), next, it is judged that from upper
The measurement of secondary case temperature plays whether have passed through defined sampling time (being in the present embodiment 15 seconds) (step 104).
In the gas furnace 1 of the present embodiment, a case temperature is often just measured by the sampling time, is not yet passing through the feelings in sampling time
(step 104 under condition：It is no) it is standby, untill by the sampling time.
Afterwards, (the step 104 in the case where have passed through the sampling time：It is), utilize temperature in the measurement cover of temperature sensor 32
(step 106) is spent, whether the case temperature for judging to measure is more than defined cut-out temperature (in the present embodiment as 155 DEG C)
(step 108).(the step 108 in the case where case temperature is cuts off more than temperature：It is), being judged as the inner side of cover 30 turns into height
Temperature simultaneously turns into danger due to certain abnormal (for example, inverse spray occurs in main burner mixing tube 18 or auxiliary burner mixing tube 19)
State, force (step 110) of stopping working by closing gas shut-off valve 41, afterwards, terminate Fig. 6 tempering detection process.
On the other hand, (the step 108 in the case where case temperature is less than cut-out temperature：It is no), when obtaining relative to benchmark
Ascending amount (the step 112) of the case temperature at quarter.As described above, in the gas furnace 1 of the present embodiment, often through over-sampling when
Between (15 seconds) just measure a case temperature, but when at the time of when will not be measured to case temperature last time as benchmark
Carve, and will trace it is defined at the time of judge time width (in the present embodiment for 5 minutes) as reference instant.In addition, certainly
In the case that elapsed time not up to judges time width from during the igniting of furnace combustor 4, by during the igniting of furnace combustor 4
Moment is as reference instant.
Also, obtaining the case temperature measured in step 106 relative to the case temperature measured in reference instant
Ascending amount after, judge the acquirement ascending amount whether exceed reference instant setting tempering threshold value (step 114).It is tied
The fruit, (step 114 in the case where the ascending amount of case temperature has exceeded tempering threshold value：It is), judge to be tempered, pass through pass
Close gas shut-off valve 41 and force flame-out (step 110), afterwards, terminate Fig. 6 tempering detection process.In addition, in the present embodiment
In, judge whether the ascending amount of case temperature exceedes " judging unit " of the control unit 50 corresponding to the present invention of tempering threshold value.Separately
Outside, the control unit 50 for carrying out closing the control of gas shut-off valve 41 corresponds to " gas cutting unit " of the invention.
On the other hand, case temperature ascending amount not less than tempering threshold value in the case of (step 114：It is no), according to
The case temperature that is measured in step 106 and correspondingly perform judgment standard setting processing (step 116).In sentencing for the step 116
In disconnected benchmark setting processing, perform and handled with judgment standard setting processing (reference picture 7) identical of above-mentioned steps 102.That is, root
Tempering threshold value is correspondingly set as the 1st threshold value, the 2nd threshold value and the 3rd threshold value according to the case temperature measured in step 106
One of.
Next, it is determined that whether by the operation of operation knob 6 make furnace combustor 4 stop burning (step 118).Then,
(the step 118 in the case where burning away：It is no), the processing of step 104 is returned to, is passing through sampling time and then secondary survey
Case temperature is measured, the above-mentioned processing after repeating.Therefore, carried out at the time of have passed through judge time width (5 minutes) afterwards afterwards
When tempering is judged in step 114, the tempering threshold value set in step 116 can be used.
During such reprocessing, in the case where not detecting tempering, stove is made by the operation of operation knob 6
Burner 4 stops (step 118 during burning：It is), terminate Fig. 6 tempering detection process.
Fig. 8 is to represent to detect whether to mix in auxiliary burner in the gas furnace 1 of the present embodiment according to tempering detection process
Close the explanation figure for the example that pipe 19 is tempered.In Fig. 8 curve map, the case temperature for taking reference instant is transverse axis, takes cover
Interior temperature, for the longitudinal axis, is shown relative to the temperature rise Δ T judged in time width (5 minutes) of reference instant with single dotted broken line
Temperature rise Δ T of the case temperature in the case where furnace combustor 4 normally burns, has been shown in solid lines case temperature and has existed
Auxiliary burner mixing tube 19 there occurs tempering in the case of temperature rise Δ T.In addition, dotted line is represented according to reference instant
Case temperature is come the tempering threshold value that sets.
As illustrated, in 4 normal combustion of furnace combustor and when auxiliary burner mixing tube 19 is tempered, it is
The case temperature of reference instant is higher, and case temperature is smaller relative to the temperature rise Δ T of reference instant.In addition, during benchmark
The case temperature at quarter is higher, and case temperature is in normal combustion relative to the temperature rise Δ T and case temperature of reference instant
It is smaller relative to the gap between the temperature rise Δ T of reference instant when being tempered.
Therefore, in the gas furnace 1 of the present embodiment, as described above, case temperature of the tempering threshold value according to reference instant
To set, if case temperature is less than 80 DEG C, tempering threshold value is set as the 1st threshold value, if case temperature is for more than 80 DEG C and small
In 110 DEG C, then tempering threshold value is set as 2nd threshold value smaller than the 1st threshold value, will tempering if case temperature is more than 110 DEG C
Threshold value is set as 3rd threshold value smaller than the 2nd threshold value.1st threshold value is set as the temperature in the cover of reference instant by testing in advance
Degree be less than it is in the case of 80 DEG C, than normal combustion when temperature rise Δ T maximum it is big and than temperature when being tempered
The small value (being in the present embodiment 23 DEG C) of ascending amount Δ T minimum value.Similarly, the 2nd threshold value is set as in reference instant
Case temperature it is in the range of from 80 DEG C to 110 DEG C, than normal combustion when temperature rise Δ T maximum it is big and than hair
The small value (being in the present embodiment 13 DEG C) of the minimum value of temperature rise Δ T when being tempered is given birth to, the 3rd threshold value is set as in benchmark
The case temperature at moment be more than 110 DEG C in the case of, than normal combustion when temperature rise Δ T maximum is big and ratio
The small value (being in the present embodiment 4 DEG C) of the minimum value of temperature rise Δ T when being tempered.
So, in the gas furnace 1 of the present embodiment, tempering threshold is changed by the case temperature according to reference instant
Value, can not only igniting to furnace combustor 4 after soon, cover 30 inner side temperature it is relatively low in the state of occur
During tempering, it can judge that the temperature rise Δ T in time width has exceeded tempering threshold value and detects according to case temperature
Auxiliary burner mixing tube 19 is tempered, and in the inner side of cover 30 as furnace combustor 4 burns away and the state of heating
Under there occurs during tempering, also can according to case temperature judging the temperature rise Δ T in time width to exceed tempering threshold value and
Detect to be tempered in auxiliary burner mixing tube 19.
Further, since the case temperature of reference instant low temperature side (cover 30 inner side temperature it is relatively low in the state of) return
Fiery threshold value is set to be greater than the tempering threshold of the high temperature side (in the state of the inner side heating of cover 30) of the case temperature of reference instant
Value, though therefore can suppress not occur to be tempered temperature rise Δ T exceedes tempering threshold value and error detection goes out tempering occurs so
Situation.
Variation as following also be present in the gas furnace 1 of above-mentioned the present embodiment.Hereinafter, with above-described embodiment not
With illustrating variation centered on part.In addition, in the explanation of variation, marked for the structure same with above-described embodiment
Identical reference simultaneously omits the description.
Fig. 9 is to represent to detect the example being tempered in auxiliary burner mixing tube 19 in the gas furnace 1 of the 1st variation
The explanation figure of son.In Fig. 9, also in the same manner as Fig. 8, the case temperature for taking reference instant is transverse axis, takes case temperature relative
In reference instant the temperature rise Δ T judged in time width (5 minutes) for the longitudinal axis, show that case temperature exists with single dotted broken line
Furnace combustor 4 normally burn in the case of temperature rise Δ T, be shown in solid lines case temperature and mixed in auxiliary burner
Temperature rise Δ T in the case of pipe 19 is closed there occurs tempering.Also, in above-described embodiment gas furnace 1, according to benchmark
The case temperature at moment and set back in a manner of being divided into ladder as 3 stages (the 1st threshold value, the 2nd threshold value, the 3rd threshold value)
Fiery threshold value, on the other hand, in the gas furnace 1 of the 1st variation, as shown in broken lines, according in the cover of reference instant
Temperature and set tempering threshold value in a linear fashion.
The straight line illustrated in dotted line in Fig. 9 obtains as follows：For the case temperature of each reference instant
Between temperature rise Δ T when (such as every 10 DEG C) obtain normal combustion and temperature rise Δ T when being tempered
Median, and consider secure context and set from the threshold value after median downward, further using expression of first degree come it is approximate this
A little threshold values.In the gas furnace 1 of the 1st variation, the judgment standard setting processing in the tempering detection process shown in Fig. 6
(step 102, in step 116), first approximation formula represented by the dotted line of reference picture 9 sets the case temperature with reference instant
Corresponding tempering threshold value.
So, in the gas furnace 1 of the 1st variation, by the case temperature according to reference instant come with the side of straight line
Formula changes tempering threshold value, compared with changing the situation of tempering threshold value in a stepped fashion, the case temperature especially in reference instant
Low temperature side, can will tempering threshold value be set to it is larger, though therefore, it is possible to suppress not occur be tempered temperature rise Δ T surpass
Cross tempering threshold value and be judged as that there occurs error detection as tempering.On the other hand, reference instant case temperature high temperature
Side, can will tempering threshold value be set to it is smaller, though therefore, it is possible to suppress to be tempered temperature rise Δ T not less than return
Fiery threshold value and can not be judged as that there occurs nd situation as tempering.
In addition, in the above-described embodiments, the judgement time width of the temperature rise Δ T for obtaining case temperature is set as
5 minutes, but this is not limited to, judgement time width can also be set according to the case temperature of reference instant.Figure 10 is to change to judge
When the explanation figure that is broadly compared to the temperature rise Δ T of case temperature.In Figure 10 curve map, reference instant is taken
Case temperature is transverse axis, takes case temperature, for the longitudinal axis, to be shown relative to the temperature rise Δ T judged in time width of reference instant
Temperature rise Δ T of the case temperature in the case where auxiliary burner mixing tube 19 is there occurs tempering, it is indicated by the solid line to sentence
Disconnected time width is set as the situation of 5 minutes, is represented will determine that time width is set as the situation of 3 minutes with double dot dash line.
As illustrated, when the case temperature of reference instant is less than 70 DEG C, if will determine that, time width is set as 3 minutes,
The temperature rise Δ T of case temperature turns into constant (peak value).That is, in feelings of the case temperature of reference instant less than 70 DEG C
Under condition, when being tempered in auxiliary burner mixing tube 19, case temperature can be with the tempering and in 3 points from occurring to be tempered
It is substantially increased in time more than clock.On the other hand, when the case temperature of reference instant is more than 70 DEG C, it will determine that the time
The temperature rise Δ T of case temperature in the case of being set as 5 minutes and in the case of will determine that the time is set as 3 minutes
The temperature rise Δ T of case temperature does not have larger difference.That is, the situation for being more than 70 DEG C in the case temperature of reference instant
Under, be tempered even in auxiliary burner mixing tube 19, case temperature can also restrain at once with the ascensional range of the tempering and
Turn into the state being saturated within 3 minutes from occurring to be tempered.
Figure 11 is judgment standard setting processing (Fig. 6 step 102, the step performed by the control unit 50 of the 2nd variation
116) flow chart.In the judgment standard setting processing of the 2nd variation, first, according to what is measured using temperature sensor 32
Case temperature is tempered threshold value (step 150) to set.In the processing of the step 150, both can as above-mentioned embodiment root
Case temperature is set in a stepped fashion according to tempering threshold value, can also set cover in a linear fashion as the 1st variation
Interior temperature.
Next, it is determined that whether the case temperature measured using temperature sensor 32 is less than 70 DEG C of (steps 152).Also,
(step 152 in the case that case temperature is less than 70 DEG C：It is), it will determine that time width is set as that the 1st time width (is 5 in the 2nd variation
Minute) (step 154).
On the other hand, (the step 152 in the case where case temperature is more than 70 DEG C：It is no), it will determine that time width is set as comparing
The 2nd short time width of 1st time width (being 3 minutes in the 2nd variation) (step 156).Sentence so being set according to case temperature
After disconnected time width, terminate Figure 11 judgment standard setting processing, return to Fig. 6 tempering detection process.Then, have passed through it is set
In the processing of the step 112 carried out at the time of after fixed judgement time width, case temperature is obtained relative to setting the judgement time width
The temperature rise of reference instant.
So, in the gas furnace 1 of the 2nd variation, during by according to the case temperature of reference instant to change judgement
Width, case temperature low temperature side (cover 30 inner side temperature it is relatively low in the state of), it can be ensured that sufficiently precise to hold cover
The judgement time width for the temperature rise Δ T that interior temperature rises with tempering, temperature rise Δ T and hair during due to normal combustion
The gap between temperature rise Δ T during raw tempering becomes big, therefore, it is possible to suppress error detection.In addition, in the height of case temperature
Warm side (in the state of the inner side heating of cover 30), case temperature understand saturation at once with the rising of tempering, therefore, pass through shortening
Judge time width, can quickly detect out and be tempered.
The present embodiment and the gas furnace 1 of variation are this concludes the description of, but the present invention is not limited to above-described embodiment and change
Shape example, and can implement in a variety of ways in the range of its purport is not departed from.
It is to possess main burner portion 11 and secondary burning with furnace combustor 4 for example, in above-mentioned the present embodiment and variation
The so-called main and side burner of the duplex in device portion 12 is illustrated.But in the Dan Ran without auxiliary burner portion 12
In burner, also it is tempered sometimes, firepower is particularly being set to the state of weaker (make the quantity delivered of fuel gas less)
Under, the ascending amount that case temperature rises with tempering is smaller, therefore, it is possible to preferably apply the present invention to detect tempering.
In addition, in above-mentioned 2nd variation, according to case temperature to be divided into two stages (the 1st time width, the 2nd time width)
The mode of such ladder sets judgement time width, but is not limited to this, can also according to case temperature and in a linear fashion
Setting judges time width.
Claims (4)
1. a kind of gas furnace, it is equipped with including the burner body with multiple burners and set from burner body extension
The furnace combustor for the mixing tube put, when being injected into the mixing tube from nozzle by the fuel gas that gas passage supplies
During openend, the mixed gas of the fuel gas and primary air that are flowed into from the openend is via the mixing tube from described
Burner is sprayed, and the gas furnace is characterised by,
The gas furnace includes：
Cover, it covers the mixing tube, and the openend is contained in into inner side；
Temperature sensor, it is installed on the cover, can measure the temperature of the inner side of the cover；
Judging unit, it periodically obtains rising of the measurement temperature of the temperature sensor in defined judgement time width
Amount, and judge whether the ascending amount has exceeded defined tempering threshold value；
Gas cutting unit, in the case where being judged as that the ascending amount has exceeded the tempering threshold value by the judging unit,
The gas cutting unit cuts off the supply of the fuel gas；And
Judgment standard setup unit, it sets the tempering threshold value according to the temperature of the inner side of the cover.
2. gas furnace according to claim 1, it is characterised in that
The judgment standard setup unit sets the tempering threshold value not only according to the temperature of the inner side of the cover, always according to described
The temperature of the inner side of cover sets the judgement time width.
3. gas furnace according to claim 1 or 2, it is characterised in that
In the mixing tube and the cover any one be provided with by with it is any another in the mixing tube and the cover
Person is in contact and heat is transferred to the heat transfer part of the cover from the mixing tube.
4. gas furnace according to claim 3, it is characterised in that
The material for the thermal conductivity factor that the cover is more than the mixing tube by thermal conductivity factor is formed.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2016-105253 | 2016-05-26 | ||
| JP2016105253A JP6726440B2 (en) | 2016-05-26 | 2016-05-26 | Gas stove |
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| Publication Number | Publication Date |
|---|---|
| CN107435954A true CN107435954A (en) | 2017-12-05 |
| CN107435954B CN107435954B (en) | 2020-03-24 |
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| CN201710384142.6A Active CN107435954B (en) | 2016-05-26 | 2017-05-26 | Gas stove |
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| Country | Link |
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| JP (1) | JP6726440B2 (en) |
| CN (1) | CN107435954B (en) |
| TW (1) | TWI711791B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111102604A (en) * | 2019-12-20 | 2020-05-05 | 华帝股份有限公司 | Method for detecting combustion abnormality of kitchen range and kitchen range |
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| JP7454999B2 (en) * | 2020-05-27 | 2024-03-25 | リンナイ株式会社 | Conlovana |
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| CN203605285U (en) * | 2013-11-28 | 2014-05-21 | 中山乐宜嘉家居设备有限公司 | Anti-backfire domestic gas stove |
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| TWM453107U (en) * | 2012-08-15 | 2013-05-11 | Univ Lunghwa Sci & Technology | Switch structure of gas stove |
| TWM512677U (en) * | 2015-07-20 | 2015-11-21 | Taiwan Sakura Corp | Backfire and eruption prevention apparatus of gas stove |
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2016
- 2016-05-26 JP JP2016105253A patent/JP6726440B2/en active Active
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- 2017-05-26 CN CN201710384142.6A patent/CN107435954B/en active Active
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| JP2003028428A (en) * | 2001-07-16 | 2003-01-29 | Matsushita Electric Ind Co Ltd | Gas stove |
| CN1757971A (en) * | 2004-10-08 | 2006-04-12 | 广州市红日燃具有限公司 | Domestic gas stove burner having tempering control function |
| TWM276170U (en) * | 2005-01-06 | 2005-09-21 | Jia-Shi Yan | Anti-back-fire gas burner |
| CN201944898U (en) * | 2011-01-18 | 2011-08-24 | 佛山市顺德区容桂万喜电器燃气具有限公司 | Thermocouple induction type artificial gas range with backfire protection device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111102604A (en) * | 2019-12-20 | 2020-05-05 | 华帝股份有限公司 | Method for detecting combustion abnormality of kitchen range and kitchen range |
| CN111102604B (en) * | 2019-12-20 | 2022-02-22 | 华帝股份有限公司 | Method for detecting combustion abnormality of kitchen range and kitchen range |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2017211147A (en) | 2017-11-30 |
| JP6726440B2 (en) | 2020-07-22 |
| CN107435954B (en) | 2020-03-24 |
| TWI711791B (en) | 2020-12-01 |
| TW201741599A (en) | 2017-12-01 |
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