CN104990268A - Blockage protection method for feed pipe and exhaust pipe of fully-premixed gas heating water heater - Google Patents
Blockage protection method for feed pipe and exhaust pipe of fully-premixed gas heating water heater Download PDFInfo
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- CN104990268A CN104990268A CN201510411115.4A CN201510411115A CN104990268A CN 104990268 A CN104990268 A CN 104990268A CN 201510411115 A CN201510411115 A CN 201510411115A CN 104990268 A CN104990268 A CN 104990268A
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Abstract
The invention provides a blockage protection method for a feed pipe and an exhaust pipe of a fully-premixed gas heating water heater. The gas heating water heater comprises an MCU, a gas valve, a draught fan, a burner, a flame signal detection needle, an air speed control circuit, an air speed detection circuit and a flame signal detection circuit. The protection method includes the steps that 1, the flame signal stop threshold value is preset at the beginning, and then the second step is executed; 2, the gas heating water heater normally works, and the rotating speed of the draught fan is V; and 3, whether the rotating speed of the draught fan is increased or not is judged. When the feed pipe and the exhaust pipe are gradually blocked, the gas heating water heater can be effectively shut down before smoke exceeds the standard. Cost is low, universality is high, and performance is stable.
Description
Technical field
The present invention relates to the guard method of a kind of fully pre-mixing gas combustion water heater for heating supply and exhaust blockage.
Background technology
Requirement is had: block machine supply and exhaust pipe gradually, machine must cut out before flue gas is above standard in the European standard of fully pre-mixing gas combustion water heater for heating and national standard.Actual test be exactly blocking machine enter air scoop and/or exhaust opening.
Conventional blocking protected mode is with the change of smoke evacuation pressure, the air pressure of entering that use 2 blast switch or pressure sensor detect in discharge tracheae respectively judges whether discharge tracheae blocks, when blast switch action or pressure depart from setting value in advance, and closing machine.The defect of this mode is: need 2 blast switch or pressure to pass sensor, cost is higher; The operating pressure value of same model blast switch is all fixing, but the air pressure of entering of different model machine is all not identical with smoke evacuation force value, and therefore different machines just needs the blast switch selecting different pressures value; Blast switch is that silicon rubber is aging in use for some time, and force value has larger drift, and namely flue blockage protection value can offset by silicon rubber epithelium detected pressures value; When blocking into air scoop, only have the change of tens handkerchiefs, change very little, conventional blast switch or pressure sensor are difficult to detect so little force value, cause detection inaccurate.In order to overcome above-mentioned defect, the guard method of fully pre-mixing gas combustion water heater for heating supply and exhaust blockage is developed.
Summary of the invention
Technical problem to be solved by this invention to provide the guard method of a kind of fully pre-mixing gas combustion water heater for heating supply and exhaust blockage; when discharge tracheae blocks gradually, before flue gas exceeds standard, effectively can close gas-heating water heater, and cost is lower; highly versatile, stable performance.
The technical scheme that the present invention solves the employing of its technical problem is: the guard method of a kind of fully pre-mixing gas combustion water heater for heating supply and exhaust blockage; described gas-heating water heater comprises MCU, burnt gas valve, blower fan, burner, flare up fire detection pin, blast velocity control circuit, wind speed measurement circuit, flare up fire testing circuit; one end of blast velocity control circuit, wind speed measurement circuit is connected with MCU; the other end is connected with blower fan; flare up fire testing circuit one end is connected with MCU; the other end and flare up fire detect pin and are connected, and described guard method comprises the steps:
1) start, preset flame signal at stop threshold values, then enters 2);
2) gas-heating water heater normally works, and rotation speed of fan is V;
3) judge whether rotation speed of fan increases, as otherwise reenter 2), then enter 4 in this way);
4) MCU regulates rotation speed of fan, then enters 5);
5) judge whether wind speed is V, as otherwise reenter 4), then enter 6 in this way);
6) judge survey flare up fire value whether be less than flare up fire close threshold values, as otherwise reenter 2), then close gas-heating water heater in this way, process ends.
In described step 4), MCU regulates the rotating speed of blower fan to the pwm signal that blast velocity control circuit exports by adjustment.
It is flame ion current detecting pin that described flare up fire detects pin.
It is flame ion Current Voltage value that described flare up fire value and flare up fire close threshold values.
Described burnt gas valve is SIT848 valve.
Described blower fan is EBM RG128 blower fan.
Described burner is metal net burner.
The present invention compares produced beneficial effect with background technology: because the present invention adopts beginning, and preset flame signal at stop threshold values, then enters 2); 2) gas-heating water heater normally works, and rotation speed of fan is V; 3) judging the scheme of the methods such as whether blower fan 6 rotating speed increases, without the need to blast switch or pressure sensor, also without the need to increasing additional detection circuits, therefore can effectively reduce costs; The machine of different model can use same circuit control system, only need to input rotation speed of fan in the man-machine interface of circuit control system and flame ion current signal closes threshold values, just effectively gas-heating water heater can be closed before exceeding standard by flue gas when supply and exhaust blockage, easy to adjust, highly versatile; Owing to not having mechanical movement part, blocking protection point drift is few, and performance is more reliable and more stable.
Accompanying drawing explanation
Fig. 1 is circuit connection diagram of the present invention.
Fig. 2 is syndeton block diagram of the present invention.
Fig. 3 is control flow chart of the present invention.
Detailed description of the invention
Referring to Fig. 1, Fig. 2, Fig. 3, the gas-heating water heater of the present embodiment comprises MCU1, burnt gas valve 5, blower fan 6, burner 7, flare up fire detects pin 8, blast velocity control circuit 2, wind speed measurement circuit 3, flare up fire testing circuit 4, blast pipe 9, to tracheae 10, premixed device 11, burnt gas valve 5 one end and gas inlet expanding channels, the other end is connected with premixed device 11, the gas outlet of premixed device 11 is connected with blower fan 6, blower fan 6 is connected with burner 7, be connected with premixed device 11 to tracheae 10 gas outlet, blast pipe 9 is connected with the gas outlet of burner 7, flare up fire detects the fire output hole place that pin 8 is arranged on burner 7, blast velocity control circuit 2, one end of wind speed measurement circuit 3 is connected with MCU1, the other end is connected with blower fan 6, flare up fire testing circuit 4 one end is connected with MCU1, the other end and flare up fire detect pin 8 and are connected.
Described wind speed measurement circuit 3 is for detecting blower fan real-time rotate speed and by signal transmission to MCU, MCU regulates rotation speed of fan by blast velocity control circuit 2, and described flare up fire testing circuit 4 detects pin 8 flame detection signal by flare up fire and flare up fire is passed to MCU.
The blocking guard method of described gas-heating water heater discharge tracheae comprises the steps:
1) start, preset flame signal at stop threshold values, then enters 2);
2) gas-heating water heater normally works, and rotation speed of fan is V;
3) judge whether blower fan 6 rotating speed increases, as otherwise reenter 2), then enter 4 in this way);
4) MCU1 regulates blower fan 6 rotating speed, then enters 5);
5) judge whether wind speed is V, as otherwise reenter 4), then enter 6 in this way);
6) judge survey flare up fire value whether be less than flare up fire close threshold values, as otherwise reenter 2), then close gas-heating water heater in this way, process ends.
Flare up fire closedown threshold values in step 1) by experiment data sets in advance, step 2) in rotation speed of fan V corresponding with gas-heating water heater set temperature, namely, during the change of gas-heating water heater set temperature, the rotating speed V of blower fan 6 is also respective change.
Why will judge in step 3) whether blower fan 6 turns degree increases, be because when entering air scoop and/or exhaust opening blocks gradually, and must cause blower fan 6 load reduction, rotating speed increase, i.e. supply and exhaust blockage, can cause rotation speed of fan to increase.Enter step 4) afterwards, MCU1 regulates the rotating speed of blower fan 6 to the pwm signal that blast velocity control circuit 2 exports by adjustment, and then make the rotating speed of blower fan 6 still maintain V, now due to flue blockage, enter air capacity to reduce, the pressure of blower fan 6 inside diminishes, burnt gas valve 5 detects that blower fan 6 internal pressure diminishes, namely the aperture that will reduce valve reduces fuel gas supply, fuel gas supply minimizing can cause combustion flame to die down, namely flame ion electric current reduces, by flare up fire testing circuit 4, MCU1 detects that flame dies down, when the flare up fire value real-time monitored is less than default flare up fire closedown threshold values, illustrate that supply and exhaust blockage is serious, and then MCU1 closes gas-heating water heater, gas-heating water heater is made to meet European standard and national standard.
It is flame ion current detecting pin that described flare up fire detects pin 8, and it is flame ion Current Voltage value that described flare up fire value and flare up fire close threshold values, and flame ion current detecting pin is conventional element, stable performance.
Described burnt gas valve 5 is SIT848 valve, and described blower fan 6 is EBM RG128 blower fan, and described burner 7 is metal net burner, and structure is simple, easy to use, stable performance.
Adopting the gas-heating water heater of this scheme without the need to installing blast switch or pressure sensor, also without the need to increasing additional detection circuits, therefore can effectively reduce costs; The machine of different model can use same circuit control system, only need to input rotation speed of fan in the man-machine interface of circuit control system and flame ion current signal closes threshold values, just effectively gas-heating water heater can be closed before exceeding standard by flue gas when supply and exhaust blockage, easy to adjust, highly versatile; Owing to not having mechanical movement part, blocking protection point drift is few, and performance is more reliable and more stable.
Claims (7)
1. fully pre-mixing gas combustion water heater for heating supply and exhaust blockage guard method, described gas-heating water heater comprises MCU(1), burnt gas valve (5), blower fan (6), burner (7), flare up fire detects pin (8), blast velocity control circuit (2), wind speed measurement circuit (3), flare up fire testing circuit (4), blast velocity control circuit (2), one end of wind speed measurement circuit (3) and MCU(1) be connected, the other end is connected with blower fan (6), flare up fire testing circuit (4) one end and MCU(1) be connected, the other end and flare up fire detect pin (8) and are connected, it is characterized in that described guard method comprises the steps:
1) start, preset flame signal at stop threshold values, then enters 2);
2) gas-heating water heater normally works, and rotation speed of fan is V;
3) judge whether blower fan (6) rotating speed increases, as otherwise reenter 2), then enter 4 in this way);
4) MCU(1) regulate blower fan (6) rotating speed, then enter 5);
5) judge whether wind speed is V, as otherwise reenter 4), then enter 6 in this way);
6) judge survey flare up fire value whether be less than flare up fire close threshold values, as otherwise reenter 2), then close gas-heating water heater in this way, process ends.
2. fully pre-mixing gas combustion water heater for heating supply and exhaust blockage according to claim 1 guard method, is characterized in that MCU(1 in described step 4)) by adjusting the rotating speed of pwm signal adjustment blower fan (6) exported to blast velocity control circuit (2).
3. fully pre-mixing gas combustion water heater for heating supply and exhaust blockage according to claim 1 and 2 guard method, it is characterized in that described flare up fire detects pin (8) is flame ion current detecting pin.
4. fully pre-mixing gas combustion water heater for heating supply and exhaust blockage according to claim 3 guard method, it is characterized in that described flare up fire value and flare up fire close threshold values is flame ion Current Voltage value.
5. fully pre-mixing gas combustion water heater for heating supply and exhaust blockage according to claim 1 and 2 guard method, is characterized in that described burnt gas valve (5) is SIT848 valve.
6. fully pre-mixing gas combustion water heater for heating supply and exhaust blockage according to claim 1 and 2 guard method, is characterized in that described blower fan (6) is for EBM RG128 blower fan.
7. fully pre-mixing gas combustion water heater for heating supply and exhaust blockage according to claim 1 and 2 guard method, is characterized in that described burner (7) is metal net burner.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510411115.4A CN104990268B (en) | 2015-07-14 | 2015-07-14 | Fully pre-mixing gas combustion water heater for heating blocks guard method to blast pipe |
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| CN201510411115.4A CN104990268B (en) | 2015-07-14 | 2015-07-14 | Fully pre-mixing gas combustion water heater for heating blocks guard method to blast pipe |
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| CN104990268A true CN104990268A (en) | 2015-10-21 |
| CN104990268B CN104990268B (en) | 2017-10-31 |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107024002A (en) * | 2017-03-15 | 2017-08-08 | 万家乐热能科技有限公司 | The condensate liquid of condensing water heater blocks monitoring device and method |
| CN107461934A (en) * | 2017-08-23 | 2017-12-12 | 广州迪森家居环境技术有限公司 | A kind of condensing type wall-mounted furnace and its adjusting method |
| CN110425744A (en) * | 2019-07-20 | 2019-11-08 | 万家乐热能科技有限公司 | A kind of adaptive fully pre-mixing gas combustion water heater for heating wind pressure control system and control method |
| CN111912123A (en) * | 2020-08-21 | 2020-11-10 | 东莞市艾瑞科热能设备有限公司 | Full-premixing condensation wall-mounted furnace and control method thereof |
| CN112254353A (en) * | 2020-10-19 | 2021-01-22 | 珠海格力电器股份有限公司 | Water heater fan control method, device and equipment and water heater |
| CN112460812A (en) * | 2020-10-29 | 2021-03-09 | 华帝股份有限公司 | Fan control method for wall-mounted boiler to strengthen smoke pipe blockage resistance and wall-mounted boiler applying fan control method |
| CN113048657A (en) * | 2021-04-29 | 2021-06-29 | 芜湖美的厨卫电器制造有限公司 | Wind resistance control method for gas water heater and gas water heater |
| CN114294836A (en) * | 2021-12-09 | 2022-04-08 | 华帝股份有限公司 | Wall-mounted boiler and operation method thereof |
| CN114322322A (en) * | 2021-12-29 | 2022-04-12 | 芜湖美的厨卫电器制造有限公司 | Gas water heater and control method, device and storage medium thereof |
| 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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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107024002A (en) * | 2017-03-15 | 2017-08-08 | 万家乐热能科技有限公司 | The condensate liquid of condensing water heater blocks monitoring device and method |
| CN107024002B (en) * | 2017-03-15 | 2022-06-10 | 万家乐热能科技有限公司 | Condensate blockage monitoring device and method for condensing water heater |
| CN107461934A (en) * | 2017-08-23 | 2017-12-12 | 广州迪森家居环境技术有限公司 | A kind of condensing type wall-mounted furnace and its adjusting method |
| CN110425744A (en) * | 2019-07-20 | 2019-11-08 | 万家乐热能科技有限公司 | A kind of adaptive fully pre-mixing gas combustion water heater for heating wind pressure control system and control method |
| CN110425744B (en) * | 2019-07-20 | 2023-11-24 | 万家乐热能科技有限公司 | Wind pressure control system and control method for full-premix gas heating water heater |
| CN111912123A (en) * | 2020-08-21 | 2020-11-10 | 东莞市艾瑞科热能设备有限公司 | Full-premixing condensation wall-mounted furnace and control method thereof |
| CN112254353A (en) * | 2020-10-19 | 2021-01-22 | 珠海格力电器股份有限公司 | Water heater fan control method, device and equipment and water heater |
| CN112460812A (en) * | 2020-10-29 | 2021-03-09 | 华帝股份有限公司 | Fan control method for wall-mounted boiler to strengthen smoke pipe blockage resistance and wall-mounted boiler applying fan control method |
| CN113048657A (en) * | 2021-04-29 | 2021-06-29 | 芜湖美的厨卫电器制造有限公司 | Wind resistance control method for gas water heater and gas water heater |
| CN114294836A (en) * | 2021-12-09 | 2022-04-08 | 华帝股份有限公司 | Wall-mounted boiler and operation method thereof |
| CN114322322A (en) * | 2021-12-29 | 2022-04-12 | 芜湖美的厨卫电器制造有限公司 | Gas water heater and control method, device and storage medium thereof |
| 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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Effective date of registration: 20170413 Address after: 528325 Guangdong Province, Foshan city Shunde District Xingtan town De Fu Road No. 71 Applicant after: Guangdong Vanward heat energy technology Co., Ltd. Address before: 528305 Foshan, Shunde District, Ronggui street, Hongqi Road, No. 80 Applicant before: Foshan Shunde Wanhe Electrical Fittings Co., Ltd. |
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