CN110319461B - Flameout prevention control method for gas stove - Google Patents
Flameout prevention control method for gas stove Download PDFInfo
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- CN110319461B CN110319461B CN201810294022.1A CN201810294022A CN110319461B CN 110319461 B CN110319461 B CN 110319461B CN 201810294022 A CN201810294022 A CN 201810294022A CN 110319461 B CN110319461 B CN 110319461B
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- 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
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Abstract
The invention relates to a flameout prevention control method for a gas stove, which is used for detecting, judging and judging an adjusting signal of a firepower gearJudging whether the firepower gear is adjusted across firepower sections or not on the basis of increasing the firepower gear, and if so, adjusting the opening of the proportional control valve to a theoretical flameout-proof opening K corresponding to the Mth-level firepower sectionMYKeeping the temperature for B seconds to effectively transfer fire, and then regulating the opening of the comparison regulating valve to a firepower gear DMACorresponding standard opening K of proportional control valveMA. When the fire gear is adjusted and if the fire gear is adjusted across a fire section, the flame-out prevention control method of the gas stove firstly adjusts the opening of the proportional control valve to the flame-out prevention opening which can ensure that the gas flow of the originally opened gas branch is not reduced, so that the condition that the gas stove is not flameout is ensured, effective fire transmission is further ensured, and the success rate of the fire transmission is improved. Meanwhile, the uniformity and stability of the flame can be effectively ensured in the adjusting process.
Description
Technical Field
The invention relates to the technical field of gas cookers, in particular to a flameout prevention control method for a gas cooker.
Background
The gas stove controls the combustion power by adjusting the opening of the valve body, and at least two combustion chambers are usually required to be matched with each other for use in order to meet the requirement of full-power adjustment from low power to high power. As shown in figure 1, the air outlet seams of the combustion chambers 1 and 2 are communicated through a fire transfer groove 3, an ignition needle 4 is positioned beside the air outlet seam of the combustion chamber 1, and different combustion powers of the gas stove are realized through adjusting the gas flow.
The success rate of power transfer between different combustors is low, often resulting in flameout failure due to failure of the transfer. The fire transfer success rate is improved by adopting a structural design optimization mode such as enlarging a fire transfer groove, but the structural design needs to be carried out again to match products by adopting the mode of improving the fire transfer groove, so that the workload is high, and the development cost is high. And the problem that flame uniformity in the working process of the gas stove is damaged by increasing the fire transmission groove, the combustion efficiency is influenced, and flameout is easily caused by the interference of the environment.
As shown in the matching schematic diagram of the internal valve body of the gas stove in fig. 2, a pipeline passage of the gas stove is provided with a stop main valve 5, a proportional control valve 6 and a stop branch valve 7, the stop main valve 5 and the stop branch valve 7 control the switching of gas channels, and the proportional control valve 6 regulates the gas flow. Taking a two-channel combustor as an example, the proportional control valve 6 is divided into two channels to respectively provide gas for the combustion chamber 1 and the combustion chamber 2. The gas stove consists of a small-firepower section and a large-firepower section, and in the small-firepower section, a stop branch valve is closed, and only gas is supplied to the combustion chamber 1, namely a single-channel working mode. In the high-firepower section, the stop branch valve 7 is opened to supply gas to the combustion chamber 1 and the combustion chamber 2 simultaneously, which is referred to as a two-channel working mode. Tests show that when the gas stove is switched from a single-channel combustion mode to a double-channel combustion mode, the gas flow rate in the combustion chamber 1 is smaller when the opening of the proportional control valve 5 is adjusted according to a normal gear and is smaller than a certain specific flow rate. After the mode is switched to the dual-channel mode, a certain time is needed for gas diffusion, and before the gas in the combustion chamber 2 is ignited, the combustion of flame cannot be maintained due to the fact that the gas flow in the combustion chamber 1 is small, and therefore accidental flameout can be caused.
The invention discloses a combustion control method of a gas water heater in Chinese patent application publication No. CN107339807A (application No. 201710059590.9), wherein the disclosed combustion control method provides a fire transfer method under an abnormal open fire state, and the success rate of fire transfer is improved on the basis of not improving the structure of a fire transfer groove, but the method cannot solve the problem of fire transfer failure caused by sharp reduction of gas flow in the switching process of a combustion channel under the normal open fire state of a gas stove. In addition, because the firepower is adjusted in a span way, the fluctuation of the gas flow in the combustion chamber is large, and the flame uniformity in the firepower adjusting process is poor.
Disclosure of Invention
The first technical problem to be solved by the present invention is to provide a flameout prevention control method for a gas stove, which can improve the success rate of flame propagation when switching the branch of gas in the normally open flame state.
The second technical problem to be solved by the present invention is to provide a flameout prevention control method for a gas stove, which can adaptively adjust the gas flow during the flame transmission process, so as to avoid the influence of the difference between the gas source and the proportional control valve on the flame transmission power.
The technical scheme adopted by the invention for solving the first technical problem is as follows: a gas stove flameout prevention control method comprises N combustion chambers, a gas pipeline and an ignition needle, wherein N is larger than or equal to 2, gas outlets of the N combustion chambers are communicated through a fire transfer groove, the gas pipeline comprises a gas main channel and N gas branches communicated with the gas main channel, each gas branch is communicated with one combustion chamber, a stop main valve for opening and closing the gas main channel and a proportional control valve for adjusting gas flow are arranged on the gas main channel, one gas branch is normally opened, and stop branch valves are respectively arranged on the rest N-1 gas branches;
gas range with N-stage fire section [ Q ]1,Q2,……,QM,……,QN]Wherein M is a positive integer, and 1. ltoreq. M.ltoreq.N, QMWhen the gas stove is in the working state of the M-level firepower section, one gas branch is in a normally open state, the stop branch valves on the M-1 gas branches are in an open state, and the stop branch valves on the rest gas branches are in a closed state;
QMincludes X-stage fire gear (D)M1,DM2,……,DMA,……,DMX]Wherein A is a positive integer, and 1. ltoreq. A. ltoreq.X, DMAAn a-th stage fire gear indicating an M-th stage fire section; the maximum firepower gear in the M-1 firepower section and the minimum firepower gear in the M-level firepower section are in a gradually increasing relationship; corresponding to each fire gear, the proportional control valve is provided with a corresponding standard opening degree [ K ]M1,KM2,……,KMA,……,KMX]In which K isMAA-th fire gear indicating an M-th fire sectionThe corresponding standard opening of the proportional control valve;
the method is characterized in that: when M is more than or equal to 2, when the Mth gas branch is additionally opened, the firepower gear D which can theoretically meet the requirement of no flameout is arrangedMYCorresponding standard opening K of proportional control valveMYTheoretical flameout-preventing opening K corresponding to M-th-level firepower sectionMFWherein F, Y are positive integers, Y is more than or equal to 1 and less than or equal to X, and F is more than or equal to 1 and less than or equal to X;
the flameout prevention control method for the gas stove comprises the following steps of:
s1, detecting an adjusting signal of a firepower gear;
s2, judging the adjusted firepower gear DMAIf the fire power shift position before adjustment is increased, the operation proceeds to S3; if not, directly adjusting the opening of the proportional control valve to a firepower gear DMACorresponding standard opening K of proportional control valveMAAnd then returns to S1;
s3, judging whether the firepower gear is adjusted across the firepower section, if not, directly adjusting the opening of the proportional control valve to the firepower gear DMACorresponding standard opening K of proportional control valveMA(ii) a If so, go to S4;
s4, judgment DMA≥DMYIf yes, directly adjusting the opening degree of the proportional control valve to a firepower gear DMACorresponding standard opening K of proportional control valveMA(ii) a If not, go to S5;
s5, adjusting the opening of the proportional control valve to the theoretical flameout preventing opening K corresponding to the M-th-level fire sectionMFKeeping for B seconds to carry out effective fire transmission;
s6, readjusting the opening of the comparative regulating valve to a fire gear DMACorresponding standard opening K of proportional control valveMA；
S7, returning to S1.
The technical scheme adopted by the invention for solving the second technical problem is as follows: s5.1 is performed simultaneously with S5;
s5.1, detecting the flame of the gas stove by using a flame sensor, judging whether the flame is extinguished, if not, carrying out S6, and if so, carrying out S5.2;
s5.2, judging whether F is less than X, and if not, prompting flameout fault; if yes, controlling the ignition needle to ignite again, and adjusting the opening of the proportional control valve to a firepower gear DM(F+i)Corresponding standard opening K of proportional control valveM(F+i)And keeping for C seconds to carry out effective fire transmission; simultaneously reassigning K to the theoretical flameout-proof opening degree corresponding to the M-level firepower sectionMF＝KM(F+i)Wherein i is a positive integer; and returns to S5.1.
Preferably, K is recovered after next power-on of the gas stoveMF＝KMY。
Preferably, i is 1.
Compared with the prior art, the invention has the advantages that: when the fire gear is adjusted and if the fire gear is adjusted across a fire section, the flame-out prevention control method of the gas stove firstly adjusts the opening of the proportional control valve to the flame-out prevention opening which can ensure that the gas flow of the originally opened gas branch is not reduced, so that the condition that the gas stove is not flameout is ensured, effective fire transmission is further ensured, and the success rate of the fire transmission is improved. Meanwhile, the uniformity and stability of the flame can be effectively ensured in the adjusting process. In addition, the influence of the difference of the air source and the proportional control valve in the using process can be eliminated according to the detection of the flame, the opening degree of the proportional control valve is automatically corrected, and the adaptation to different using environments is guaranteed.
Drawings
Fig. 1 is a schematic view of a gas range according to an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of a gas pipeline in the embodiment of the invention.
Fig. 3 is a flowchart of a flameout prevention control method for a gas stove according to an embodiment of the present invention.
Detailed Description
The invention is described in further detail below with reference to the accompanying examples.
The existing gas stove comprises N combustion chambers, a gas pipeline and an ignition needle, wherein N is larger than or equal to 2, gas outlets of the N combustion chambers are communicated through a fire transfer groove, the gas pipeline comprises a gas main channel and N gas branches communicated with the gas main channel, each gas branch is communicated with one combustion chamber, a stop main valve for opening and closing the gas main channel and a proportional control valve for adjusting gas flow are arranged on the gas main channel, one gas branch is normally opened, and the rest N-1 gas branches are respectively provided with a stop branch valve. When the gas stove is used, the on-off of gas supply of the gas stove is controlled through the stop main valve on the gas main channel, and in the using process, the on-off regulation is performed on the stop branch valve on the gas branch according to the regulation of different firepower gears, so that the ventilation quantity in the gas stove is regulated. In this embodiment, an example is given where N is 2, that is, one gas branch is normally open, and the other gas branch is provided with a cut-off branch valve. For convenience of description, the normally open gas branch is referred to as a first branch for supplying gas to the first combustion chamber, and the gas branch passing through the stop branch valve is referred to as a second branch for supplying gas to the second combustion chamber.
Thus, the gas stove in this embodiment has two-stage fire section [ Q ]1,Q2]，Q1Representing the first stage fire section, Q2And when the gas stove is in the working state of the second-stage fire section, the stop branch valve on the second branch is in an opening state.
Multiple firepower gears can be arranged in each firepower section according to requirements, and Q is arranged for convenience of descriptionMIncludes X-stage fire gear (D)M1,DM2,……,DMA,……,DMX]M is 1 or M is 2, and A is a positive integer, and 1. ltoreq. A.ltoreq.X, DMAThe a-th fire stage representing the M-th fire section, and the maximum fire stage in the first fire section is smaller than the minimum fire stage in the second fire section, both of which present an increasing relationship. The X value of the first stage power section and the X value of the second stage power section may be the same or different. In the present embodiment, the X value of the first stage fire section is the same as the X value of the second stage fire section. Corresponding to each fire gear, the proportional control valve is provided with a corresponding standard opening degree [ K ]M1,KM2,……,KMA,……,KMX]In which K isMAAnd a proportional control valve standard opening corresponding to the A-th fire gear of the M-th fire section.
The firepower gear D which can meet the requirement of no flameout theoretically is stored in the control system2YCorresponding standard opening K of proportional control valve2YIs a reaction of K2YDefined as the theoretical flameout-proof opening K corresponding to the second-stage fire section2FWherein F, Y are positive integers, Y is more than or equal to 1 and less than or equal to X, and F is more than or equal to 1 and less than or equal to X.
As shown in fig. 3, the method for controlling flameout of a gas stove in this embodiment includes the following steps:
s1, detecting an adjusting signal of a firepower gear in real time in the working process of the gas stove after normal ignition, and carrying out S2 when the adjusting signal of the firepower gear is detected; wherein, the firepower gear adjusting signal can be detected by various methods in the prior art, and the firepower gear after adjustment is detected as DMA；
S2, comparing the adjusted firepower gear with the firepower gear before adjustment by the existing method, and judging the firepower gear D after adjustmentMAIf the fire power shift position before adjustment is increased, that is, if the fire power shift position is adjusted from the low fire power shift position to the high fire power shift position, the operation goes to S3;
if not, namely under the condition that the firepower gear is reduced, the opening degree of the proportional control valve is directly adjusted to the firepower gear D no matter whether the firepower gear is adjusted across firepower sections or notMACorresponding standard opening K of proportional control valveMAAnd then returns to S1; in the fire gear adjusting process, if the fire gear is adjusted in a non-span fire section, the proportional adjusting valve is correspondingly reduced, the gas flow in the originally communicated gas branch cannot be greatly changed, and accordingly, the flameout condition cannot occur normally; if the adjustment is carried out across the fire section, namely the second branch is required to be closed, the gas quantity in the first branch cannot be suddenly reduced or even slightly increased, and at the moment, the flameout condition cannot occur, so that the normal combustion of flame of the gas stove is ensured;
s3, judging the fire power shiftWhether to cross firepower district section and adjust, judge whether firepower gear jumps to the firepower gear in the second firepower district section promptly, if not, just keep only first branch to switch on promptly, the state that the second branch was closed, at this moment, the gas flow in the first branch need not to spread to in the second branch, the condition that the gas flow in the first branch can not appear reducing suddenly promptly, the gas volume in the corresponding first combustion chamber keeps the steady state that changes, the condition of flame-out can not appear usually, in this adjustment process, then directly adjust the aperture of proportion regulating valve to firepower gear DMACorresponding standard opening K of proportional control valveMAThen the method is finished;
if yes, namely, the firepower gear jumps to the firepower gear in the second firepower section, at the moment, a cut-off branch valve on the second branch needs to be opened to realize the conduction of the second branch, when the second branch is just conducted, the gas in the first branch can spread into the second branch, at the moment, if a main gas channel cannot timely supply a large amount of gas to the first branch, the gas quantity in the first branch can be sharply reduced, namely, the gas quantity led into the first combustion chamber can be suddenly reduced, and the gas quantities in the first branch and the second branch are both at a lower level, the first combustion chamber can possibly be flameout, the success rate of fire transfer is low, and at the moment, S4 needs to be carried out to ensure the success of fire transfer;
s4, judging whether D is2A≥D2FIf so, the firepower gear adjusted by the proportional control valve is larger than the firepower gear D which can theoretically meet the requirement of no flameout2FDuring the process, the gas quantity of the gas main channel introduced into the two gas branches can timely supply the gas quantity requirements of the first branch and the second branch on normal fire transmission, and then the opening degree of the proportional control valve is directly adjusted to a firepower gear D2ACorresponding standard opening K of proportional control valve2AThen the method is finished; if not, the standard opening K of the proportional control valve at the moment2AIf the requirements of the first branch and the second branch on the gas quantity of normal fire transmission cannot be met, S5 is carried out;
s5, adjusting the opening of the proportional control valve to the theoretical flameout preventing opening K corresponding to the second-stage fire section2FKeeping for B seconds to carry out effective fire transmission; the effective fire transfer time can be set according to experimental data;
meanwhile, because the air sources used by each user house have difference, product difference also exists in the device for comparing and adjusting the valve, and the device only has the set theoretical flameout-proof opening K2YThe opening of the comparison regulating valve is regulated, so that the gas stove can not adapt to all users, and in this case, in order to ensure that the gas stove in various use environments can realize effective fire transfer, the following steps are carried out simultaneously:
s5.1, detecting the flame of the gas stove by using a flame sensor, judging whether the flame is extinguished, if not, carrying out S6, and if so, carrying out S5.2;
s5.2, judging whether F is less than X, and if not, prompting flameout fault; if yes, controlling the ignition needle to ignite again, and adjusting the opening of the proportional control valve to a firepower gear D2(F+i)Corresponding standard opening K of proportional control valve 2(F+i)And keeping for C seconds to carry out effective fire transmission; at the same time will K2(F+i)Assigning a theoretical flameout-preventing opening K corresponding to the M-th-level fire section2FI.e. F ═ F + i, K2F＝K2(F+i)Wherein i is a positive integer, in this embodiment i ═ 1; c is more than or equal to B, and C can also be specifically set according to experimental data; returning to S5.1;
recovering K after next power-on of gas stove2F＝K2Y；
S6, readjusting the opening of the comparative regulating valve to a fire gear D2ACorresponding standard opening K of proportional control valve2A；
S7, returning to S1.
When the fire gear is adjusted and if the fire gear is adjusted across a fire section, the flame-out prevention control method of the gas stove firstly adjusts the opening of the proportional control valve to the flame-out prevention opening which can ensure that the gas flow of the originally opened gas branch is not reduced, so that the condition that the gas stove is not flameout is ensured, effective fire transmission is further ensured, and the success rate of the fire transmission is improved. Meanwhile, the uniformity and stability of the flame can be effectively ensured in the adjusting process. In addition, the influence of the difference of the air source and the proportional control valve in the using process can be eliminated according to the detection of the flame, the opening degree of the proportional control valve is automatically corrected, and the adaptation to different using environments is guaranteed.
Claims (4)
1. A gas stove flameout prevention control method comprises N combustion chambers, a gas pipeline and an ignition needle, wherein N is larger than or equal to 2, gas outlets of the N combustion chambers are communicated through a fire transfer groove, the gas pipeline comprises a gas main channel and N gas branches communicated with the gas main channel, each gas branch is communicated with one combustion chamber, a stop main valve for opening and closing the gas main channel and a proportional control valve for adjusting gas flow are arranged on the gas main channel, one gas branch is normally opened, and stop branch valves are respectively arranged on the rest N-1 gas branches;
gas range with N-stage fire section [ Q ]1,Q2,……,QM,……,QN]Wherein M is a positive integer, and 1. ltoreq. M.ltoreq.N, QMWhen the gas stove is in the working state of the M-level firepower section, one gas branch is in a normally open state, the stop branch valves on the M-1 gas branches are in an open state, and the stop branch valves on the rest gas branches are in a closed state;
QMincludes X-stage fire gear (D)M1,DM2,……,DMA,……,DMX]Wherein A is a positive integer, and 1. ltoreq. A. ltoreq.X, DMAAn a-th stage fire gear indicating an M-th stage fire section; the maximum firepower gear in the M-1 firepower section and the minimum firepower gear in the M-level firepower section are in a gradually increasing relationship; corresponding to each fire gear, the proportional control valve is provided with a corresponding standard opening degree [ K ]M1,KM2,……,KMA,……,KMX]In which K isMAThe standard opening degree of the proportional control valve corresponding to the A-level fire gear of the M-level fire section is represented;
the method is characterized in that: when M is more than or equal to 2, when the Mth gas branch is additionally opened, the firepower gear D which can theoretically meet the requirement of no flameout is arrangedMYCorresponding standard opening K of proportional control valveMYTheoretical flameout-preventing opening K corresponding to M-th-level firepower sectionMFWherein F, Y are positive integers, Y is more than or equal to 1 and less than or equal to X, and F is more than or equal to 1 and less than or equal to X;
the flameout prevention control method for the gas stove comprises the following steps of:
s1, detecting an adjusting signal of a firepower gear;
s2, judging the adjusted firepower gear DMAIf the fire power shift position before adjustment is increased, the operation proceeds to S3; if not, directly adjusting the opening of the proportional control valve to a firepower gear DMACorresponding standard opening K of proportional control valveMAAnd then returns to S1;
s3, judging whether the firepower gear is adjusted across the firepower section, if not, directly adjusting the opening of the proportional control valve to the firepower gear DMACorresponding standard opening K of proportional control valveMA(ii) a If so, go to S4;
s4, judgment DMA≥DMYIf yes, directly adjusting the opening degree of the proportional control valve to a firepower gear DMACorresponding standard opening K of proportional control valveMA(ii) a If not, go to S5;
s5, adjusting the opening of the proportional control valve to the theoretical flameout preventing opening K corresponding to the M-th-level fire sectionMFKeeping for B seconds to carry out effective fire transmission;
s6, readjusting the opening of the comparative regulating valve to a fire gear DMACorresponding standard opening K of proportional control valveMA；
S7, returning to S1.
2. The flameout prevention control method for a gas stove according to claim 1, characterized in that: s5.1 is performed simultaneously with S5;
s5.1, detecting the flame of the gas stove by using a flame sensor, judging whether the flame is extinguished, if not, carrying out S6, and if so, carrying out S5.2;
s5.2, judging whether F is less than X, and if not, prompting flameout fault; if so, controlling the ignition needle to ignite again,and the opening degree of the proportional control valve is adjusted to a firepower gear DM(F+i)Corresponding standard opening K of proportional control valveM(F+i)And keeping for C seconds to carry out effective fire transmission; simultaneously reassigning K to the theoretical flameout-proof opening degree corresponding to the M-level firepower sectionMF＝KM(F+i)Wherein i is a positive integer; and returns to S5.1.
3. The gas stove flameout prevention control method according to claim 2, characterized in that: recovering K after next power-on of gas stoveMF＝KMY。
4. The gas stove flameout prevention control method according to claim 2, characterized in that: i is 1.
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| CN111853864B (en) * | 2020-06-30 | 2022-04-19 | 宁波方太厨具有限公司 | Cooker-leaving working method of cooker and cooker applying method |
| CN112032774A (en) * | 2020-08-19 | 2020-12-04 | 华帝股份有限公司 | Fire adjusting control method and system for kitchen range |
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| CN2481999Y (en) * | 2001-04-29 | 2002-03-13 | 钟显力 | Flame auto-adjusting device for gas and fuel oil stove |
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| CN106989419A (en) * | 2017-04-10 | 2017-07-28 | 杜明月 | A kind of integrated kitchen range kitchen range control system |
| CN107796025A (en) * | 2017-11-23 | 2018-03-13 | 深圳市火王燃器具有限公司 | A kind of new gas-cooker |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2481999Y (en) * | 2001-04-29 | 2002-03-13 | 钟显力 | Flame auto-adjusting device for gas and fuel oil stove |
| CN2564900Y (en) * | 2002-06-26 | 2003-08-06 | 苏以强 | Multi-stage fire auto-controller for gas range |
| CN103148512A (en) * | 2013-03-07 | 2013-06-12 | 曾文洲 | Fire striking head, electromagnetic valves-controlled gear shifting stove device and control method of device |
| CN106871168A (en) * | 2017-03-10 | 2017-06-20 | 李明守 | A kind of intelligence control system suitable for gas-cooker |
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