CN111365851B - Method for controlling water heater based on wind pressure - Google Patents
Method for controlling water heater based on wind pressure Download PDFInfo
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- CN111365851B CN111365851B CN202010136594.4A CN202010136594A CN111365851B CN 111365851 B CN111365851 B CN 111365851B CN 202010136594 A CN202010136594 A CN 202010136594A CN 111365851 B CN111365851 B CN 111365851B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 100
- 238000000034 method Methods 0.000 title claims abstract description 30
- 238000002485 combustion reaction Methods 0.000 claims abstract description 46
- 239000000779 smoke Substances 0.000 claims description 8
- 239000007789 gas Substances 0.000 description 10
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000013024 troubleshooting Methods 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
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- 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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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Regulation And Control Of Combustion (AREA)
Abstract
The invention discloses a method for controlling a water heater based on wind pressure, which comprises the following steps: step S1, setting the current normal and stable combustion wind pressure value of the water heater as Y1Detecting whether the real-time wind pressure is less than the insufficient combustion wind pressure threshold value Y2If so, thenStep S2 is entered, if not, the combustion is normally ignited; step S2, detecting whether the real-time wind pressure is less than the alarm wind pressure threshold value Y3If yes, go to step S4, otherwise go to step S3; step S3, detecting that the real-time wind pressure is less than the insufficient combustion wind pressure threshold Y2Whether the duration of (D) reaches the time t1If yes, the water heater is shut down, otherwise, the step S1 is executed; step S4, detecting that the real-time wind pressure is smaller than the alarm wind pressure threshold value Y3Whether the duration of (D) reaches the time t2If so, the water heater is turned off, otherwise, the process proceeds to step S1. The invention reasonably adjusts the ignition condition and the alarm flameout condition of the gas water heater, so that the water heater can normally ignite and burn in a safe wind pressure range.
Description
Technical Field
The invention belongs to the technical field of gas water heaters, and particularly relates to a method for controlling a water heater based on air pressure.
Background
Most of the existing gas water heaters are alternating-current updraft gas water heaters, the fan of the existing gas water heaters cannot be adjusted, when a user uses water, the gas water heater detects a water flow signal, the fan is started to clean the water, waste gas in the water heater is discharged through a smoke tube, the air pressure switch detects a closing signal, then ignition is carried out, an air valve is opened, combustion is carried out, and water flows out through the water heater after being heated.
Before ignition or in the combustion process, whether a wind pressure switch is closed or not is judged, and the closing represents that the air channel is smooth and the wind pressure system is normal. Due to the fact that external wind is large, or the smoke pipe is accidentally blocked, and the wind switch is not closed, flame overflow or insufficient combustion may occur. The water heater can give an alarm. However, because the wind pressure switch only has two signals for opening and closing, alarm points are consistent under different installation environments (smoke tube length), partial alarm is not timely, or alarm is too early, or false alarm easily occurs under gust, and finally the water heater cannot effectively ignite and burn, so that normal use and safety are affected.
When the water heater in the prior art burns, the ignition combustion can be carried out only by ensuring the smoothness of the air channel, otherwise, the oxygen supply is insufficient, flame downward burning (flame overflow) is caused after 5s, the related electric connecting wire of the water heater is damaged, and the flame overflow can not be generated in 3s generally. After the fan is started and the air duct system is unobstructed, the air duct generates air pressure towards the smoke tube direction, and the air pressure switch is closed after detecting the air pressure. The wind pressure signal line outputs a low level signal. If the smoke pipe is blocked, the wind generated by the fan is not discharged outwards, and the wind pressure switch cannot detect a closing signal at the moment, and the corresponding wind pressure value of the closing signal is about 69 pa. The wind pressure value corresponding to the open circuit is about 30 pa. The inside mechanical contact structure that is of wind pressure switch, the time is easy for the oxidation to close for a long time, leads to the wind pressure testing result inaccurate.
Disclosure of Invention
In order to solve the problems of the prior art, the present invention provides a method for controlling a water heater based on wind pressure, which can reasonably and safely control the operation of the water heater according to the wind pressure.
In order to achieve the above object, the present invention provides a method for controlling a water heater based on wind pressure, comprising the following steps:
step S1, setting the current normal and stable combustion wind pressure value of the water heater as Y1The threshold value of insufficient combustion wind pressure is Y2The alarm wind pressure threshold is Y3(ii) a Detecting whether the real-time wind pressure of a smoke tube of a water heater is smaller than an insufficient combustion wind pressure threshold Y2If yes, the step S2 is executed, otherwise, the combustion is normally ignited;
step S2, detecting whether the real-time wind pressure is less than the alarm wind pressure threshold value Y3If yes, go to step S4, otherwise go to step S3;
step S3, detecting that the real-time wind pressure is less than the insufficient combustion wind pressure threshold Y2Whether the duration of (D) reaches the time t1If yes, the water heater is shut down, otherwise, the step S1 is executed;
step S4, detecting that the real-time wind pressure is smaller than the alarm wind pressure threshold value Y3Whether the duration of (D) reaches the time t2If so, the water heater is shut down, otherwise, the step is enteredS1。
Further, the method comprises step S0, setting the quick ignition wind pressure value as Y4Before the water heater is ignited and combusted, whether the real-time air pressure is greater than the quick ignition air pressure value Y or not is detected4If yes, the water heater is started to ignite quickly, and the process goes to step S1, otherwise, the water heater is not ignited.
Further, the method also comprises a step S5, wherein whether the water heater is turned off or not is judged, if yes, the water heater is shut down, and if not, the method goes to a step S1.
Further, the wind pressure value of the last normal stable combustion is set as the initial wind pressure value Y of the current combustion0Quick ignition wind pressure value Y4Is in the range of 30% Y0-35％YO。
Further, an insufficient combustion wind pressure threshold Y2Is taken in the range of 20% Y1-30％Y1。
Further, alarm wind pressure threshold Y3Is taken in the range of 10% Y1-20％Y1。
Further, time t1The value range of (A) is 8-10 s.
Further, time t2The value range of (A) is 1.5-3 s.
Compared with the prior art, the invention has the beneficial effects that: the method adopts the wind pressure sensor to detect the real-time wind pressure change in real time, combines the insufficient combustion wind pressure threshold value, the alarm wind pressure threshold value and the current wind pressure value of normal and stable combustion according to the dynamic change of the wind pressure, reasonably adjusts the ignition condition and the alarm flameout condition of the gas water heater, enables the water heater to normally ignite and combust in a safe wind pressure range, and avoids the unsafe condition that the traditional water heater can only control the switch of the water heater through two signals set by the wind pressure switch, the ignition condition and the flameout condition can not be effectively and flexibly adjusted according to the actual wind pressure condition, and the water heater can not fully generate CO or flame overflow due to the combustion.
Drawings
Fig. 1 is a flowchart of a method for controlling a water heater based on wind pressure according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The embodiment of the invention provides a method for controlling a water heater based on wind pressure, which comprises the following steps as shown in figure 1:
step S1, setting the current normal and stable combustion wind pressure value of the water heater as Y1The threshold value of insufficient combustion wind pressure is Y2The alarm wind pressure threshold is Y3(ii) a Detecting whether the real-time wind pressure of a smoke tube of a water heater is smaller than an insufficient combustion wind pressure threshold Y2If yes, the step S2 is executed, otherwise, the combustion is normally ignited;
step S2, detecting whether the real-time wind pressure is less than the alarm wind pressure threshold value Y3If yes, go to step S4, otherwise go to step S3;
step S3, detecting that the real-time wind pressure is less than the insufficient combustion wind pressure threshold Y2Whether the duration of (D) reaches the time t1If yes, the water heater is shut down, otherwise, the step S1 is executed;
step S4, detecting that the real-time wind pressure is smaller than the alarm wind pressure threshold value Y3Whether the duration of (D) reaches the time t2If so, the water heater is turned off, otherwise, the process proceeds to step S1.
By adopting the method, the real-time wind pressure change is detected in real time by adopting the wind pressure sensor, the ignition condition and the alarm flameout condition of the gas water heater are reasonably adjusted according to the dynamic change of the wind pressure by combining the insufficient combustion wind pressure threshold value, the alarm wind pressure threshold value and the current wind pressure value of normal and stable combustion, so that the water heater can normally ignite and combust in a safe wind pressure range and accurately flameout under unsafe wind pressure;
setting a threshold Y of insufficient wind pressure2The dangerous situation that the combustion of gas is unstable or insufficient and high-concentration CO is generated when the water heater is ignited and combusted under small wind pressure can be avoided; setting alarm wind pressure threshold Y3Can have strong wind outsideOr the water heater gas pipe is blocked and not smooth, the combustion of the water heater is stopped in time, and the serious flame overflow caused by the continuous ignition combustion of the water heater is prevented.
As shown in FIG. 1, before step S1, a step S0 is further included to set the quick-ignition wind pressure value Y4Before the water heater is ignited and combusted, whether the real-time air pressure is greater than the quick ignition air pressure value Y or not is detected4If yes, the water heater is started to ignite quickly, and the process goes to step S1, otherwise, the water heater is not ignited. Therefore, the water heater can be ignited quickly under safe wind pressure, and a user can use hot water quickly.
The embodiment further includes step S5, determining whether the water heater is turned off, if so, turning off the water heater, otherwise, entering step S1. Specifically, in step S1, if the detected real-time wind pressure is not less than the insufficient combustion wind pressure threshold Y2Preferentially proceed to step S5; in step S4, if the detected real-time wind pressure is less than the warning wind pressure threshold Y3Does not reach the time t2If so, the process advances preferentially to step S5. Therefore, the water heater can be prevented from continuously burning after the user turns off the water supply.
In this embodiment, the wind pressure value of the normal and stable combustion of the water heater last time is set as the initial wind pressure value Y of the combustion at this time0Quick ignition wind pressure value Y4Is in the range of 30% Y0-35％YOIn this embodiment, Y4Preferably 30% Y0(ii) a Real-time wind pressure Y detected before ignition of water heater>Y4The current wind pressure is safe, the water heater can ignite quickly, hot water can be discharged quickly, and the water heater is convenient to use.
Insufficient combustion wind pressure threshold Y2Is taken in the range of 20% Y1-30％Y1(ii) a Alarm wind pressure threshold Y3Is taken in the range of 10% Y1-20％Y1(ii) a In this example Y2Preferably 30% Y1，Y3Preferably 20% Y1. Thus, the wind pressure value can be Y according to the current normal stable combustion1The ignition condition of the water heater is effectively set, so that the water heater can work normally and safely.
Time t1Value ofIn the range of 8-10s, this example t1Preferably 8 s; because under the condition of external small gust, the condition that the wind pressure is lower is probably appeared, because gust duration is shorter, and time delay 8s, when the wind pressure was greater than 30% again in this period, the water heater wind pressure can automatic recovery to normal condition, avoids the wrong report to warn and lets the frequent ignition flame-out of water heater in the short time, influences normal use.
Time t2The value range of (A) is 1.5-3 s; example t2Preferably 2S; therefore, the device can accurately judge whether the outside has strong wind or the air duct of the water heater is blocked, so as to give an alarm in time for reminding, perform further troubleshooting and avoid serious flame overflow.
The specific method of the embodiment is as follows:
step S0, setting the wind pressure value of the normal and stable burning of the water heater last time as the initial wind pressure value Y of the burning of this time0Quick ignition wind pressure value Y4＝30％Y0Before the water heater is ignited and combusted, whether the real-time air pressure is greater than the quick ignition air pressure value is detected to be Y4If yes, the water heater is started to ignite quickly, and the step S1 is entered, otherwise, the water heater does not ignite and an alarm is given to wind pressure failure;
step S1, setting the current normal and stable combustion wind pressure value of the water heater as Y1Insufficient combustion wind pressure threshold Y2＝30％Y1Alarm wind pressure threshold value Y3＝20％Y1(ii) a Detecting whether the real-time wind pressure is less than the insufficient combustion wind pressure threshold value Y2If yes, go to step S2, otherwise go to step S5;
step S2, detecting whether the real-time wind pressure is less than the alarm wind pressure threshold value Y3If yes, go to step S4, otherwise go to step S3;
step S3, detecting that the real-time wind pressure is less than the insufficient combustion wind pressure threshold Y2If the duration time of the water heater reaches more than 8S, the water heater is shut down and the wind pressure fault is alarmed, otherwise, the step S1 is carried out;
step S4, detecting that the real-time wind pressure is smaller than the alarm wind pressure threshold value Y3If the duration time of the water heater reaches more than 2s, the water heater is extinguished andalarming the wind pressure fault, if not, entering the step S5;
and step S5, judging whether the water heater is turned off, if so, closing a flameout gas valve of the water heater, and if not, entering step S1.
The embodiment replaces a wind pressure switch in the prior art with the wind pressure sensor, analog signals replace digital signals, and alarm points can be judged by reading the specific signal size of wind pressure in different states. The problem of untimely or early warning or the warning easily appears under the gust is prevented.
The above description is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are also within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (8)
1. A method for controlling a water heater based on wind pressure is characterized by comprising the following steps:
step S1, setting the current normal and stable combustion wind pressure value of the water heater as Y1The threshold value of insufficient combustion wind pressure is Y2The alarm wind pressure threshold is Y3(ii) a Detecting whether the real-time wind pressure of a smoke tube of a water heater is smaller than an insufficient combustion wind pressure threshold Y2If yes, the step S2 is executed, otherwise, the combustion is normally ignited;
step S2, detecting whether the real-time wind pressure is less than the alarm wind pressure threshold value Y3If yes, go to step S4, otherwise go to step S3;
step S3, detecting that the real-time wind pressure is less than the insufficient combustion wind pressure threshold Y2Whether the duration of (D) reaches the time t1If yes, the water heater is shut down, otherwise, the step S1 is executed;
step S4, detecting that the real-time wind pressure is smaller than the alarm wind pressure threshold value Y3Whether the duration of (D) reaches the time t2If so, the water heater is turned off, otherwise, the process proceeds to step S1.
2. The method for controlling a water heater according to claim 1, further comprising a step S0 of setting the rapid-ignition wind pressure value to Y4Before the water heater is ignited and combusted, whether the real-time air pressure is greater than the quick ignition air pressure value Y or not is detected4If yes, the water heater is started to ignite quickly, and the process goes to step S1, otherwise, the water heater is not ignited.
3. The method for controlling a water heater according to claim 1, further comprising a step S5 of determining whether the water heater is turned off, if so, turning off the water heater, otherwise, entering a step S1.
4. The method for controlling a water heater based on wind pressure according to claim 2, wherein the wind pressure value of the last normal stable combustion is set as the initial wind pressure value Y of the current combustion0And the quick ignition wind pressure value Y4Is in the range of 30% Y0-35％Y0。
5. The method of claim 4, wherein the insufficient combustion wind pressure threshold Y is set according to the wind pressure control water heater control method2Is taken in the range of 20% Y1-30％Y1。
6. The method for controlling a water heater based on wind pressure according to claim 5, wherein the alarm wind pressure threshold value Y is set3Is taken in the range of 10% Y1-20％Y1。
7. The method for controlling a water heater based on wind pressure according to claim 6, wherein the time t is1The value range of (A) is 8-10 s.
8. The method for controlling a water heater based on wind pressure according to claim 7, wherein the time t is2The value range of (A) is 1.5-3 s.
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| CN112128991B (en) * | 2020-09-02 | 2022-02-22 | 华帝股份有限公司 | Exhaust protection control method and water heater using same |
| CN112161292A (en) * | 2020-09-14 | 2021-01-01 | 华帝股份有限公司 | Combustion state control method of combustion system and water heater using combustion state control method |
| CN113028652B (en) * | 2021-04-03 | 2022-04-26 | 中山百得厨卫有限公司 | Water heater control method based on wind pressure sensor and water heater |
| CN116026043A (en) * | 2022-12-30 | 2023-04-28 | 广东万和热能科技有限公司 | Wind pressure switch control method and device for gas heating water heater |
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| JPS60185052A (en) * | 1984-02-29 | 1985-09-20 | Matsushita Electric Ind Co Ltd | Instantaneous water heater |
| KR100704715B1 (en) * | 2005-09-22 | 2007-04-09 | 주식회사 경동나비엔 | Cut-off Method For Security Of Boiler On Burning |
| CN202158666U (en) * | 2011-07-07 | 2012-03-07 | 海尔集团公司 | Internal pressure feedback regulation system of gas water heater |
| CN103727676B (en) * | 2013-12-02 | 2017-01-18 | 芜湖美的厨卫电器制造有限公司 | Gas water heater |
| CN204478515U (en) * | 2015-01-26 | 2015-07-15 | 广东万和新电气股份有限公司 | Domestic gas-fired water heater |
| CN205373066U (en) * | 2015-12-28 | 2016-07-06 | 思达文电器（深圳）有限公司 | High -efficient burning intelligence constant temperature gas heater |
| CN105757994A (en) * | 2016-01-18 | 2016-07-13 | 广东万家乐燃气具有限公司 | Gas water heater self-adaption wind pressure resisting control method and system |
| CN106766220A (en) * | 2016-12-20 | 2017-05-31 | 广东万家乐燃气具有限公司 | A kind of gas water heater control system of air quantity self adaptation |
| CN208765277U (en) * | 2018-05-30 | 2019-04-19 | 上海欧特电器有限公司 | A kind of safety device of gas heater |
| CN208779722U (en) * | 2018-06-01 | 2019-04-23 | 广东万和热能科技有限公司 | Gas-heating water heater air-fuel ratio control device and gas-heating water heater |
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