CN110030739B - Combustion control method of gas water heater - Google Patents
Combustion control method of gas water heater Download PDFInfo
- Publication number
- CN110030739B CN110030739B CN201810033381.1A CN201810033381A CN110030739B CN 110030739 B CN110030739 B CN 110030739B CN 201810033381 A CN201810033381 A CN 201810033381A CN 110030739 B CN110030739 B CN 110030739B
- Authority
- CN
- China
- Prior art keywords
- wind pressure
- fan
- rotating speed
- current
- controller
- 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.)
- Active
Links
Images
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
Landscapes
- 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 relates to a combustion control method of a gas water heater, wherein the gas water heater comprises a combustor, a proportional valve, a fan and a controller, and is characterized in that: the exhaust port of the gas water heater is provided with a wind pressure sensor, the wind pressure sensor is also connected with the controller, and a wind pressure reference database and a fan rotating speed compensation database are preserved in the controller in advance. Compared with the prior art, the invention has the advantages that: when the external air pressure is not generated, the detection value of the air pressure sensor of the fan at different rotating speeds is pre-stored as an air pressure reference value, the rotating speed compensation quantity required to be adjusted of the fan is also pre-stored under the condition of different reference rotating speeds, when different air pressure values exist in the external world, the influence of the air pressure generated by the fan on the detection value of the air pressure sensor can be better avoided, meanwhile, the adjustment of the rotating speed of the fan is controlled more accurately, and the control method is more accurate.
Description
Technical Field
The invention relates to a combustion control method of a gas water heater.
Background
During the use process of the household gas water heater, a plurality of uncontrollable factors are faced, such as fluctuation of water inlet flow, different purity of combustion gas, different air pressure of the combustion gas, overlarge external air pressure caused by external wind blowing and the like, and all the factors can influence the constant temperature performance of the gas water heater or cause the abnormal work of the gas water heater. The problem that the machine that wherein external wind pressure is too big causes can't normally burn and bring is increasingly outstanding, like the high-rise resident family in coastal city, the water heater air outlet often has very big wind-force, and the water heater will appear the ignition point after wind-force reaches certain intensity and stay, or is blown out scheduling problem suddenly when burning. These problems have resulted in a reduction in the environmental capabilities of domestic gas water heaters.
The working process of the conventional household gas water heater comprises the following steps: as long as it has gas and air to mix according to certain proportion and can burn the heating in the combustion chamber to guarantee during normal combustion, the air is blown to in the combustion chamber by the fan, combustible gas is delivered to in the combustion chamber by the proportional valve control, air and combustible gas mix the postcombustion in the combustion chamber, waste gas after the burning is discharged through the gas outlet at gas heater top, if external wind pressure is too big this moment, external air will flow backward in toward the combustion chamber by the air outlet, air and combustible gas's ratio change in the combustion chamber leads to the ignition point not being or the phenomenon of flameout suddenly in the burning this moment.
In order to solve the above problems, the existing gas water heater with wind resistance generally carries out the detection of the wind pressure by additionally arranging a wind pressure sensor at the air outlet of the gas water heater, when the wind pressure sensor detects the wind pressure value, the rotating speed of the fan is increased, wherein the numerical value of the increased rotating speed of the fan is in a linear relation with the magnitude of the external wind pressure data. In the gas water heater, because the installation positions of the fans are different, the modes of sending air into the combustion chamber generally comprise a blowing mode and an air suction mode; in the blowing type, most of fans are arranged below the combustor, and an air outlet of each fan is communicated with the combustion chamber and blows air into the combustion chamber of the combustor; in the air draft type, most of fans are arranged above the combustor, and an air inlet of each fan is communicated with the combustion chamber and used for exhausting air to the combustion chamber so as to enable external air to enter the combustion chamber; the control method is not accurate, particularly for the lower blowing type fan, even if no wind pressure exists outside, the wind pressure sensor can detect a certain wind pressure value because the fan operates, and in addition, the control method is not accurate because the linear relation is formed between the numerical value of the increase of the rotating speed of the fan and the magnitude of external wind pressure data, and the accurate wind resistance can not be clearly known only by the increase of the rotating speed of the fan.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a combustion control method of a gas water heater, which can be accurately controlled and can not blow out a combustor when the external wind pressure is too large, aiming at the prior art.
The technical scheme adopted by the invention for solving the technical problems is as follows: a combustion control method of a gas water heater, wherein the gas water heater comprises a burner with a combustion chamber, a proportional valve for controlling the amount of combustion gas entering the combustion chamber of the burner, a fan with an air outlet communicated with the combustion chamber and used for blowing air into the combustion chamber and controlling the amount of blown air, and a controller connected with the proportional valve and the fan, and is characterized in that: set up the wind pressure sensor in gas heater's exhaust vent department or be close to exhaust vent department, the wind pressure sensor is also connected with the controller, predetermine in the controller and preserve wind pressure benchmark database, be equipped with in this wind pressure benchmark database under the external no wind pressure condition, the wind pressure benchmark value that the wind pressure sensor detected when the fan is at different rotational speeds, simultaneously, also prestore the fan rotational speed compensation database in the controller, the fan rotational speed compensation database is preserved in and is had the fan under the different benchmark rotational speed condition, when the external world has different wind pressure values, the rotational speed compensation volume that the fan needs the adjustment in order to satisfy with current proportional valve opening phase-match, after the success igniteing, the controller carries out combustion control through following step:
step 1, a controller obtains a current wind pressure detection value through data measured by a wind pressure sensor in real time;
step 2, according to the actual rotating speed of the current fan, a wind pressure reference value under the actual rotating speed condition of the current fan is obtained through query by combining a wind pressure reference database;
3, subtracting the current wind pressure detection value obtained in the step 1 from the wind pressure reference value obtained in the step 2, and if the absolute value of the difference value of the two is less than or equal to a preset value M, controlling the fan to continue to operate according to the current rotating speed by the controller, and controlling the proportional valve to keep the current opening unchanged; otherwise, entering step 4;
step 4, if the current wind pressure detection value obtained in the step 1 is larger than the wind pressure reference value obtained in the step 2, and the current wind pressure detection value is larger than the wind pressure reference value plus the preset value M, taking the difference between the current wind pressure detection value obtained in the step 1 and the wind pressure reference value obtained in the step 2 as the current external wind pressure, combining the current rotating speed of the fan, inquiring a fan rotating speed compensation database to obtain the rotating speed compensation quantity required to be adjusted by the fan, then increasing the rotating speed of the fan according to the rotating speed compensation quantity, controlling a proportional valve to keep the current opening constant, and then returning to the step 1; otherwise, entering step 5;
and 5, taking the difference between the wind pressure reference value obtained in the step 2 and the current wind pressure detection value obtained in the step 1 as the current external wind pressure, inquiring a fan rotating speed compensation database by combining the current rotating speed of the fan to obtain a rotating speed compensation quantity required to be adjusted by the fan, reducing the rotating speed of the fan according to the rotating speed compensation quantity, controlling the proportional valve to keep the current opening unchanged, and returning to the step 1.
Preferably, the preset value M is 13-17 Pa.
Compared with the prior art, the invention has the advantages that: when the external air pressure is not generated, the detection value of the air pressure sensor of the fan at different rotating speeds is pre-stored as an air pressure reference value, the rotating speed compensation quantity required to be adjusted of the fan is also pre-stored under the condition of different reference rotating speeds, when different air pressure values exist in the external world, the influence of the air pressure generated by the fan on the detection value of the air pressure sensor can be better avoided, meanwhile, the adjustment of the rotating speed of the fan is controlled more accurately, and the control method is more accurate.
Drawings
Fig. 1 is a schematic structural diagram of a gas water heater in the embodiment of the invention.
FIG. 2 is a flow chart of a combustion 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.
The gas water heater as shown in fig. 1 comprises a combustor 2 with a combustion chamber 1, a proportional valve 3 for controlling the amount of combustion gas entering the combustion chamber of the combustor, a fan 4 with an air outlet communicated with the combustion chamber and used for blowing air into the combustion chamber and controlling the amount of blown air, a controller (not shown in the figure) connected with the proportional valve 3 and the fan 4, a gas collecting hood 5 with an air outlet arranged above the combustor, an air outlet 6 of the gas collecting hood is communicated with the outside, the air outlet of the gas collecting hood is the air outlet of the gas water heater, a wind pressure sensor 7 is arranged at or close to the air outlet, and the wind pressure sensor is also connected with the controller.
The controller is internally preset with a wind pressure reference database, the wind pressure reference database is internally provided with a wind pressure reference value detected by a wind pressure sensor when the fan is at different rotating speeds under the condition of no wind pressure outside, meanwhile, the controller is also preset with a fan rotating speed compensation database, the fan rotating speed compensation database is internally stored with a rotating speed compensation amount which needs to be adjusted so as to meet the requirement of matching with the current proportional valve opening degree when the fan is at different reference rotating speeds and different wind pressure values exist outside, the wind pressure reference database and the fan rotating speed compensation database can be pre-measured in a laboratory, wherein the wind pressure reference database is simple in measurement, namely the fan is at different rotating speeds under the condition of ensuring no wind pressure outside, and the wind pressure values measured by the wind pressure sensor are respectively recorded to be the wind pressure reference value; the measurement of the fan rotating speed compensation database is to respectively record that different external wind pressures are respectively applied to the outside under the condition that the fan is at different rotating speeds, and then record the rotating speed of the fan which needs to be adjusted, and the gas in the combustion chamber can be normally and fully combusted; for example, when the fan rotates at 2K, the external wind pressure is increased from 0, the rotating speed of the fan is adjusted, and by observing the combustion condition in the combustion chamber, the gas in the combustion chamber can be normally and sufficiently combusted when the fan needs to be adjusted.
After the ignition is successful, the controller performs combustion control by the following steps, as shown in fig. 2:
step 1, a controller obtains a current wind pressure detection value through data measured by a wind pressure sensor in real time;
step 2, according to the actual rotating speed of the current fan, a wind pressure reference value under the actual rotating speed condition of the current fan is obtained through query by combining a wind pressure reference database;
3, subtracting the current wind pressure detection value obtained in the step 1 from the wind pressure reference value obtained in the step 2, and if the absolute value of the difference value of the two is less than or equal to a preset value M, controlling the fan to continue to operate according to the current rotating speed by the controller, and controlling the proportional valve to keep the current opening unchanged; otherwise, entering step 4; in this embodiment, the preset value M is 15 Pa;
step 4, if the current wind pressure detection value obtained in the step 1 is larger than the wind pressure reference value obtained in the step 2, and the current wind pressure detection value is larger than the wind pressure reference value plus the preset value M, taking the difference between the current wind pressure detection value obtained in the step 1 and the wind pressure reference value obtained in the step 2 as the current external wind pressure, combining the current rotating speed of the fan, inquiring a fan rotating speed compensation database to obtain the rotating speed compensation quantity required to be adjusted by the fan, then increasing the rotating speed of the fan according to the rotating speed compensation quantity, controlling a proportional valve to keep the current opening constant, and then returning to the step 1; otherwise, entering step 5;
and 5, taking the difference between the wind pressure reference value obtained in the step 2 and the current wind pressure detection value obtained in the step 1 as the current external wind pressure, inquiring a fan rotating speed compensation database by combining the current rotating speed of the fan to obtain a rotating speed compensation quantity required to be adjusted by the fan, reducing the rotating speed of the fan according to the rotating speed compensation quantity, controlling the proportional valve to keep the current opening unchanged, and returning to the step 1.
The control method provided by the invention can ensure the constant temperature performance of the water heater, can ensure that the water heater works in an environment with overlarge wind pressure, simultaneously better avoids the influence of the wind pressure generated by the fan on the detection value of the wind pressure sensor, more accurately controls the adjustment of the rotating speed of the fan, and is more accurate.
Claims (2)
1. A combustion control method of a gas water heater, wherein the gas water heater comprises a burner with a combustion chamber, a proportional valve for controlling the amount of combustion gas entering the combustion chamber of the burner, a fan with an air outlet communicated with the combustion chamber and used for blowing air into the combustion chamber and controlling the amount of blown air, and a controller connected with the proportional valve and the fan, and is characterized in that: set up the wind pressure sensor in gas heater's exhaust vent department or be close to exhaust vent department, the wind pressure sensor is also connected with the controller, predetermine in the controller and preserve wind pressure benchmark database, be equipped with in this wind pressure benchmark database under the external no wind pressure condition, the wind pressure benchmark value that the wind pressure sensor detected when the fan is at different rotational speeds, simultaneously, also prestore the fan rotational speed compensation database in the controller, the fan rotational speed compensation database is preserved in and is had the fan under the different benchmark rotational speed condition, when the external world has different wind pressure values, the rotational speed compensation volume that the fan needs the adjustment in order to satisfy with current proportional valve opening phase-match, after the success igniteing, the controller carries out combustion control through following step:
step 1, a controller obtains a current wind pressure detection value through data measured by a wind pressure sensor in real time;
step 2, according to the actual rotating speed of the current fan, a wind pressure reference value under the actual rotating speed condition of the current fan is obtained through query by combining a wind pressure reference database;
3, subtracting the current wind pressure detection value obtained in the step 1 from the wind pressure reference value obtained in the step 2, and if the absolute value of the difference value of the two is less than or equal to a preset value M, controlling the fan to continue to operate according to the current rotating speed by the controller, and controlling the proportional valve to keep the current opening unchanged; otherwise, entering step 4;
step 4, if the current wind pressure detection value obtained in the step 1 is larger than the wind pressure reference value obtained in the step 2, and the current wind pressure detection value is larger than the wind pressure reference value plus the preset value M, taking the difference between the current wind pressure detection value obtained in the step 1 and the wind pressure reference value obtained in the step 2 as the current external wind pressure, combining the current rotating speed of the fan, inquiring a fan rotating speed compensation database to obtain the rotating speed compensation quantity required to be adjusted by the fan, then increasing the rotating speed of the fan according to the rotating speed compensation quantity, controlling a proportional valve to keep the current opening constant, and then returning to the step 1; otherwise, entering step 5;
and 5, taking the difference between the wind pressure reference value obtained in the step 2 and the current wind pressure detection value obtained in the step 1 as the current external wind pressure, inquiring a fan rotating speed compensation database by combining the current rotating speed of the fan to obtain a rotating speed compensation quantity required to be adjusted by the fan, reducing the rotating speed of the fan according to the rotating speed compensation quantity, controlling the proportional valve to keep the current opening unchanged, and returning to the step 1.
2. The combustion control method of a gas water heater according to claim 1, characterized in that: the preset value M is 13-17 Pa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810033381.1A CN110030739B (en) | 2018-01-11 | 2018-01-11 | Combustion control method of gas water heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810033381.1A CN110030739B (en) | 2018-01-11 | 2018-01-11 | Combustion control method of gas water heater |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110030739A CN110030739A (en) | 2019-07-19 |
| CN110030739B true CN110030739B (en) | 2021-05-18 |
Family
ID=67234524
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810033381.1A Active CN110030739B (en) | 2018-01-11 | 2018-01-11 | Combustion control method of gas water heater |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110030739B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112128987A (en) * | 2020-08-31 | 2020-12-25 | 华帝股份有限公司 | Method for controlling stable combustion of water heater and water heater |
| CN114322322B (en) * | 2021-12-29 | 2023-06-30 | 芜湖美的厨卫电器制造有限公司 | Gas water heater, control method and device thereof and storage medium |
| CN114322318A (en) * | 2021-12-29 | 2022-04-12 | 芜湖美的厨卫电器制造有限公司 | Water heater and control method and control device thereof |
| CN114838453B (en) * | 2022-04-21 | 2023-06-13 | 珠海格力电器股份有限公司 | Formaldehyde detection method, formaldehyde detection device, air purifier and storage medium |
| CN115793743B (en) * | 2023-02-09 | 2023-05-02 | 杭州长川科技股份有限公司 | Electronic component testing temperature control method and system |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04155151A (en) * | 1990-10-18 | 1992-05-28 | Noritz Corp | Freezing prevention device in indoor installation, forced exhaustion type combustion apparatus |
| CN2364383Y (en) * | 1999-03-01 | 2000-02-16 | 顺德市万和企业集团公司 | Blowing burning gas water heater |
| CN202158666U (en) * | 2011-07-07 | 2012-03-07 | 海尔集团公司 | Internal pressure feedback regulation system of gas water heater |
| CN105757998A (en) * | 2016-03-25 | 2016-07-13 | 芜湖美的厨卫电器制造有限公司 | Gas water heater and exhaust controlling method thereof |
| CN106225249A (en) * | 2016-08-31 | 2016-12-14 | 芜湖美的厨卫电器制造有限公司 | Gas heater and safety control system thereof and method |
| 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 |
| CN206504456U (en) * | 2017-02-15 | 2017-09-19 | 中山市恒乐电器有限公司 | A kind of strong drum-type fully pre-mixing gas combustion water heater |
-
2018
- 2018-01-11 CN CN201810033381.1A patent/CN110030739B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04155151A (en) * | 1990-10-18 | 1992-05-28 | Noritz Corp | Freezing prevention device in indoor installation, forced exhaustion type combustion apparatus |
| CN2364383Y (en) * | 1999-03-01 | 2000-02-16 | 顺德市万和企业集团公司 | Blowing burning gas water heater |
| CN202158666U (en) * | 2011-07-07 | 2012-03-07 | 海尔集团公司 | Internal pressure feedback regulation system of gas water heater |
| CN105757998A (en) * | 2016-03-25 | 2016-07-13 | 芜湖美的厨卫电器制造有限公司 | Gas water heater and exhaust controlling method thereof |
| CN106225249A (en) * | 2016-08-31 | 2016-12-14 | 芜湖美的厨卫电器制造有限公司 | Gas heater and safety control system thereof and method |
| 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 |
| CN206504456U (en) * | 2017-02-15 | 2017-09-19 | 中山市恒乐电器有限公司 | A kind of strong drum-type fully pre-mixing gas combustion water heater |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110030739A (en) | 2019-07-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110030739B (en) | Combustion control method of gas water heater | |
| CN110030738B (en) | Combustion control method of gas water heater | |
| CN108662747B (en) | Gas water heater and control method thereof | |
| CN113048657B (en) | Wind-resistant control method for gas water heater and gas water heater | |
| CN107339811B (en) | A method of detection gas heater burning gases whether standard | |
| CN109945498A (en) | A kind of fan of gas water heater self-adaptation control method and gas heater | |
| CN106705442A (en) | Gas water heater with self-adaption function | |
| US8535050B2 (en) | Forced flue type combustion device | |
| CN112146263A (en) | Water heating equipment, control method thereof and electronic equipment | |
| US20050287253A1 (en) | Method for setting the performance of gas-operated cooking equipment as a function of geodetic height | |
| CN113932457B (en) | Method for automatically matching combustion condition and wind speed of gas water heater | |
| CN110307643A (en) | A kind of gas heater and its method for controlling combustion | |
| CN206247649U (en) | A kind of gas heater with adaptation function | |
| KR20110021551A (en) | Air pressure sensor error detecting method in air proportionality type boiler | |
| CN110486949B (en) | Double-fan gas water heater control method and gas water heater | |
| CN107917536A (en) | One kind fires hot equipment thermic load adaptive approach and device | |
| CN112797620B (en) | Gas heating water heater and control method thereof | |
| CN109612115A (en) | The control method of gas heater and the adaptive flue pressure change of wall-hung boiler | |
| WO2018040447A1 (en) | Gas water heater and security control system and method therefor | |
| CN211176783U (en) | Natural gas combustion closed-loop control system | |
| CN210662920U (en) | Heating control system | |
| CN209926597U (en) | Combustion heat exchange device, gas wall-mounted furnace and gas water heater | |
| CN206828447U (en) | A kind of quenching stove prestores the control pressurer system of room | |
| CN1548805A (en) | Air ratio control boiler | |
| CN112212357A (en) | Gas quantity control method, gas wall-mounted furnace, gas water heater and heating and ventilation system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |