CN111174436B - Control method of gas water heater - Google Patents
Control method of gas water heater Download PDFInfo
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- CN111174436B CN111174436B CN201811334007.1A CN201811334007A CN111174436B CN 111174436 B CN111174436 B CN 111174436B CN 201811334007 A CN201811334007 A CN 201811334007A CN 111174436 B CN111174436 B CN 111174436B
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- water heater
- gas water
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 61
- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000010438 heat treatment Methods 0.000 claims abstract description 9
- 238000002485 combustion reaction Methods 0.000 claims description 14
- 230000006698 induction Effects 0.000 claims description 6
- 230000003044 adaptive effect Effects 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/20—Arrangement or mounting of control or safety devices
- F24H9/2007—Arrangement or mounting of control or safety devices for water heaters
- F24H9/2035—Arrangement or mounting of control or safety devices for water heaters using fluid fuel
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N1/00—Regulating fuel supply
- F23N1/02—Regulating fuel supply conjointly with air supply
- F23N1/025—Regulating fuel supply conjointly with air supply using electrical or electromechanical means
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Regulation And Control Of Combustion (AREA)
Abstract
A control method of a gas water heater is characterized by comprising the following steps: firstly, power-on initialization setting; whether heating is needed or not, if so, ignition; if not, standby state; thirdly, calculating a heating target power Q, judging whether Q reaches the minimum heating power, and if so, executing the next step; if not, burning normally; fourthly, whether N is larger than 0 or not is judged, if yes, the next step is executed; if not, executing the step seven; fifth, Imin＝I0+N·Xi(ii) a Sixthly, judgment IminWhether or not it is greater than I0+YmaxIf is, Imin＝I0+YmaxThe minimum rotating speed of the fan; if no, Imin＝I0+N·XiThe minimum rotating speed of the fan; seven, Imin＝I0The minimum rotating speed of the fan; eighthly, judging whether the gas water heater is flamed out or not, if so, judging that the gas water heater is flamed out, and if not, judging that the gas water heater is flamed out, wherein the judgment result is N + 1; if not, returning to the third step; ninthly, judging whether N is larger than M, if so, giving a fault alarm; if not, shutting down the machine and returning to the step two. The invention has the advantages that: when the gas water heater burns at the minimum yield, the self-adaptive adjustment of the proportional valve current of the gas water heater can be realized, and the self-adaptive performance of the product is greatly improved; and the flameout fault alarm rate is reduced.
Description
Technical Field
The invention relates to a gas water heater device, in particular to a control method of a gas water heater.
Background
The household gas water heater has differences in production and manufacturing and differences in actual application environments, so that the adaptability of different users in different houses is different in the using process.
The proportional valve is the key part that provides the gas volume, and in order to guarantee gas heater's normal burning, the gas volume that the proportional valve provided will be fully combined with the air quantity that the fan provided, just can guarantee normal burning satisfying under certain air-fuel ratio condition, otherwise can appear various if can't burn or shut down the equal trouble, cause equipment frequent alarm.
However, in the use process of the gas water heater, along with the aging of the proportional valve device and the problems of combustion consistency and the like, the risk of secondary pressure drop is easy to occur in the combustion process, namely, the gas quantity is reduced in the combustion process, and particularly, when the machine is combusted at the minimum power/minimum load, the problems of point misfire or flameout in the combustion process are easy to occur, so that fault alarm is frequent, the adaptability of the product is poor, and the user experience is poor.
Therefore, in view of the above situation, how to improve the adaptability of the gas water heater during minimum power/minimum load combustion and reduce the failure rate during restarting still needs to be further improved.
Disclosure of Invention
The technical problem to be solved by the present invention is to provide a control method for a gas water heater, which can realize adaptive adjustment of proportional valve current when the gas water heater is in minimum power combustion, and the control method can effectively reduce the failure rate of easy flameout when the gas water heater is in minimum power combustion.
The technical scheme adopted by the invention for solving the technical problems is as follows: a control method of a gas water heater is characterized by comprising the following steps:
step one, electrifying a gas water heater, initializing and setting parameters, and setting the minimum current I of a proportional valvemin＝I0When the flameout frequency N is equal to 0, the gas water heater is in a standby state;
step two, judging whether heating is needed at present, if so, igniting the gas water heater, and executing the next step; if not, keeping the standby state and circulating the step;
step three, calculating a target power Q to be heated of the gas water heater, and judging whether the target power Q reaches the minimum heating power, wherein Q is (set temperature-inlet water temperature) multiplied by water flow; if yes, executing the next step; if not, executing normal combustion, and ending the program;
step four, judging whether the flameout times N are larger than 0, if so, executing the next step; if not, executing the step seven;
step five, according to Imin＝I0+N·XiAdjusting the minimum current of the proportional valve, wherein N is the flameout times and XiThe amplitude of the current increase of the proportional valve after restarting after each flameout;
step six, judging IminWhether or not it is greater than I0+YmaxWherein Y ismaxMaximum magnitude of proportional valve current increase; if yes, the current of the proportional valve is controlled to be Imin＝I0+YmaxControlling the fan to operate at the minimum rotating speed, and executing the step eight; if not, the current of the proportional valve is controlled to be Imin＝I0+N·XiControlling the fan to operate at the minimum rotating speed, and executing the step eight;
step seven, controlling the current of the proportional valve at the minimum current Imin＝I0The fan is controlled to operate at the minimum rotating speed;
step eight, judging whether the gas water heater is flamed out or not, if so, judging the flameout times to be N +1, and then executing the next step; if not, returning to the third step;
step nine, judging whether the total flameout times N are greater than the preset flameout times M or not, and if yes, prompting a fault alarm; if not, the gas water heater is shut down and the step two is returned.
Preferably, the minimum current value I of the proportional valve preset in the first step0The value range of (1) is that 20mA is less than or equal to I0≤40mA。
Preferably, the number of flameouts N in the first step is an integer greater than or equal to 0.
In order to avoid frequent flameout alarm, preferably, X in the fifth stepiThe value range of (1) is 2 mA-XiLess than or equal to 5 mA. Namely, the minimum current value I of the proportional valve can be automatically adjusted after each flameout0To increase a certain amount of XiTherefore, the normal operation of the gas water heater can be realized when the gas water heater works at the minimum power after the gas water heater is started next time, flameout alarm is prevented, and fault rate error reporting is reduced.
Preferably, Y in the sixth stepmaxThe value range of (1) is 10 mA-YmaxLess than or equal to 20 mA. I.e. the minimum current value I of the proportional valve0The amount of increase should not be too great to avoid major deviations of the equipment causing other problems with adaptability.
Preferably, the gas water heater is further provided with an induction needle, and whether the gas water heater is flamed out or not is judged through the induction needle in the step eight.
And step nine, the value of the preset flameout times M is an integer which is more than or equal to 1 and less than or equal to 5.
Compared with the prior art, the invention has the advantages that: when the gas water heater burns at the minimum yield, the self-adaptive adjustment of the proportional valve current of the gas water heater can be realized (the minimum current of the proportional valve is increased by a certain amount after the proportional valve is turned off every time), compared with the traditional fixed pre-adjustment mode, the parameter adjustment mode of the invention is more flexible and intelligent, more reasonable parameter adjustment can be made according to different use environments and equipment, and the self-adaptive performance of the product is greatly improved; meanwhile, once flameout fault occurs, the gas water heater can record the current parameter during flameout while alarming, and automatically adjust the current of the proportional valve when starting up next time, so that the flameout fault can be avoided from occurring again under the same condition, and the flameout fault alarming rate is reduced.
Drawings
Fig. 1 is a flow chart of a control method of a gas water heater according to an embodiment of the invention.
Detailed Description
The invention is described in further detail below with reference to the accompanying examples.
When the gas water heater is in normal combustion, the secondary pressure that proportional valve provided is pressed the reason scope and is usually: 180 Pa-1000 Pa, the rotating speed of the fan is 2200-5000 r/min generally, when the equipment works in the state of minimum power, the proportional valve of the gas water heater can control the secondary pressure to be 180Pa at the minimum value, and the rotating speed of the fan is 2200 r/min at the minimum value, at this time, if the air-fuel ratio of the equipment is reasonable, the normal combustion can be met; however, as the equipment ages, the consistency of the proportional valve is also poor, the current of the proportional valve cannot be adjusted in a self-adaptive manner, when the equipment burns at the minimum power, the minimum value of the secondary pressure may be reduced to 100Pa, and at this time, even if the rotating speed of the fan is kept to be operated at the minimum rotating speed, flameout occurs and the fan cannot be used, that is, once the equipment burns at the minimum power, flameout alarm occurs, and the user experience is poor.
In order to solve the existing problems, as shown in fig. 1, the present embodiment discloses a control method for a gas water heater, which includes the following steps:
step one, electrifying a gas water heater, initializing and setting parameters, and setting the minimum current I of a proportional valvemin＝I0When the flameout frequency N is equal to 0, the gas water heater is in a standby state; wherein the preset minimum current value I of the proportional valve0The value range of (1) is that 20mA is less than or equal to I0Less than or equal to 40mA, and the flameout times N is an integer more than or equal to 0;
step two, judging whether heating is needed at present, if so, igniting the gas water heater, and executing the next step; if not, keeping the standby state and circulating the step;
step three, calculating a target power Q to be heated of the gas water heater, and judging whether the target power Q reaches the minimum heating power, if so, executing the next step; if not, executing normal combustion, and ending the program;
step four, judging whether the flameout times N are larger than 0, if so, executing the next step; if not, executing the step seven;
step five, according to Imin＝I0+N·XiAdjusting the minimum current of the proportional valve, wherein N is the flameout times and XiFor the magnitude of the increase in proportional valve current after restarting after each shutdown, XiThe value range of (1) is 2 mA-Xi≤5mA；
Step six, judging IminWhether or not it is greater than I0+YmaxWherein Y ismaxMaximum amplitude of proportional valve current increase, YmaxThe value range of (1) is 10 mA-YmaxLess than or equal to 20 mA; if yes, the current of the proportional valve is controlled to be Imin＝I0+YmaxControlling the fan to operate at the minimum rotating speed, and executing the step eight; if not, the current of the proportional valve is controlled to be Imin＝I0+N·XiControlling the fan to operate at the minimum rotating speed, and executing the step eight;
step seven, controlling the current of the proportional valve at the minimum current Imin＝I0The fan is controlled to operate at the minimum rotating speed;
step eight, the gas water heater is also provided with an induction needle, whether the gas water heater is flamed out or not is judged through the induction needle, if yes, the flameout frequency is N +1, and then the next step is executed; if not, returning to the third step;
judging whether the total flameout times N are larger than a preset flameout time M or not, wherein M is an integer and is more than or equal to 2 and less than or equal to 5; if yes, prompting a fault alarm; if not, the gas water heater is shut down and the step two is returned.
After the control method is adopted by the gas water heater, when the proportional valve and the fan of the equipment are found to operate near the minimum power during combustion, once unexpected flameout occurs during combustion, the flameout times N are accumulated and increased, and the current minimum current I of the proportional valve is recorded0When the gas water heater is started up next time and then burns near the minimum power, the system can increase the minimum current of the proportional valve by XiI.e. Imin＝I0+Xi(ii) a If the valve is extinguished again, the minimum current of the proportional valve is increased by X againiI.e. Imin＝I0+2·XiBy analogy, the minimum current of the proportional valve is at a small amplitude X each timeiThe value is increased, when the minimum current of the proportional valve is increased by YmaxThe time is not increased any more, so that the problem of other adaptability caused by larger deviation of equipment is avoided.
The control method of the embodiment can greatly increase the adaptability of the equipment, and once flameout, the adaptive adjustment of the current of the proportional valve can be realized after the equipment is started next time, so that the flameout phenomenon can be avoided under the same condition, the system fault rate alarm can be reduced, and the maintenance cost can be reduced.
Claims (7)
1. A control method of a gas water heater is characterized by comprising the following steps:
step one, electrifying a gas water heater, initializing and setting parameters, and setting the minimum current I of a proportional valvemin＝I0When the flameout frequency N is equal to 0, the gas water heater is in a standby state;
step two, judging whether heating is needed at present, if so, igniting the gas water heater, and executing the next step; if not, keeping the standby state and circulating the step;
step three, calculating a target power Q to be heated of the gas water heater, and judging whether the target power Q reaches the minimum heating power, if so, executing the next step; if not, executing normal combustion, and ending the program;
step four, judging whether the flameout times N are larger than 0, if so, executing the next step; if not, executing the step seven;
step five, according to Imin＝I0+N·XiAdjusting the minimum current of the proportional valve, wherein N is the flameout times and XiThe amplitude of the current increase of the proportional valve after restarting after each flameout;
step six, judging IminWhether or not it is greater than I0+YmaxWherein Y ismaxMaximum magnitude of proportional valve current increase; if yes, the current of the proportional valve is controlled to be Imin＝I0+YmaxControlling the fan to operate at the minimum rotating speed, and executing the step eight; if not, the current of the proportional valve is controlled to be Imin＝I0+N·XiControlling the fan to operate at the minimum rotating speed, and executing the step eight;
step seven, controlling the current of the proportional valve at the minimum current Imin＝I0The fan is controlled to operate at the minimum rotating speed;
step eight, judging whether the gas water heater is flamed out or not, if so, judging the flameout times to be N +1, and then executing the next step; if not, returning to the third step;
step nine, judging whether the total flameout times N are greater than the preset flameout times M or not, and if yes, prompting a fault alarm; if not, the gas water heater is shut down and the step two is returned.
2. The control method of a gas water heater according to claim 1, characterized in that: the minimum current value I of the proportional valve preset in the step one0The value range of (1) is that 20mA is less than or equal to I0≤40mA。
3. The control method of a gas water heater according to claim 1, characterized in that: in the first step, the flameout times N are integers which are greater than or equal to 0.
4. The control method of a gas water heater according to claim 1, characterized in that: in the fifth step XiThe value range of (1) is 2 mA-Xi≤5mA。
5. The control method of a gas water heater according to claim 1, characterized in that: y in the sixth stepmaxThe value range of (1) is 10 mA-Ymax≤20mA。
6. The control method of a gas water heater according to claim 1, characterized in that: and the gas water heater is also provided with an induction needle, and whether the gas water heater is flamed out or not is judged through the induction needle in the step eight.
7. The control method of a gas water heater according to claim 1, characterized in that: and step nine, the value of the preset flameout times M is an integer which is more than or equal to 1 and less than or equal to 5.
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| CN201811334007.1A CN111174436B (en) | 2018-11-09 | 2018-11-09 | Control method of gas water heater |
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| CN201811334007.1A CN111174436B (en) | 2018-11-09 | 2018-11-09 | Control method of gas water heater |
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| CN111174436A CN111174436A (en) | 2020-05-19 |
| CN111174436B true CN111174436B (en) | 2021-07-23 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115111783A (en) * | 2021-03-19 | 2022-09-27 | 保音股份有限公司 | Water heater power control method |
| CN115507554B (en) * | 2021-06-03 | 2025-02-07 | 宁波方太厨具有限公司 | Automatic adjustment method for gas water heater |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01118065A (en) * | 1987-10-30 | 1989-05-10 | Rinnai Corp | Hot water supplying device |
| JPH10238767A (en) * | 1997-02-28 | 1998-09-08 | Gastar Corp | Combustor |
| CN101493157A (en) * | 2009-02-26 | 2009-07-29 | 潘兆铿 | Vertical rotor type gas electromagnetic valve |
| CN202328813U (en) * | 2011-11-21 | 2012-07-11 | 广东万和新电气股份有限公司 | Gas control device of compulsory-emission type gas water heater |
| TW201606239A (en) * | 2014-08-04 | 2016-02-16 | Grand Mate Co Ltd | Burning control method of gas appliance |
| CN206094581U (en) * | 2016-09-05 | 2017-04-12 | 罗欣奎 | General mood link gear of gas heater or hanging stove |
| CN106766213A (en) * | 2016-11-01 | 2017-05-31 | 珠海格力电器股份有限公司 | Ignition control method and device for gas wall-mounted boiler and gas wall-mounted boiler |
| CN111256371A (en) * | 2020-01-19 | 2020-06-09 | 宁波方太厨具有限公司 | Automatic calibration method for secondary pressure of gas water heater |
-
2018
- 2018-11-09 CN CN201811334007.1A patent/CN111174436B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01118065A (en) * | 1987-10-30 | 1989-05-10 | Rinnai Corp | Hot water supplying device |
| JPH10238767A (en) * | 1997-02-28 | 1998-09-08 | Gastar Corp | Combustor |
| CN101493157A (en) * | 2009-02-26 | 2009-07-29 | 潘兆铿 | Vertical rotor type gas electromagnetic valve |
| CN202328813U (en) * | 2011-11-21 | 2012-07-11 | 广东万和新电气股份有限公司 | Gas control device of compulsory-emission type gas water heater |
| TW201606239A (en) * | 2014-08-04 | 2016-02-16 | Grand Mate Co Ltd | Burning control method of gas appliance |
| CN206094581U (en) * | 2016-09-05 | 2017-04-12 | 罗欣奎 | General mood link gear of gas heater or hanging stove |
| CN106766213A (en) * | 2016-11-01 | 2017-05-31 | 珠海格力电器股份有限公司 | Ignition control method and device for gas wall-mounted boiler and gas wall-mounted boiler |
| CN111256371A (en) * | 2020-01-19 | 2020-06-09 | 宁波方太厨具有限公司 | Automatic calibration method for secondary pressure of gas water heater |
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