CN104864603A - Air-fuel ratio regulating method for gas heating water heater - Google Patents
Air-fuel ratio regulating method for gas heating water heater Download PDFInfo
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- CN104864603A CN104864603A CN201510274728.8A CN201510274728A CN104864603A CN 104864603 A CN104864603 A CN 104864603A CN 201510274728 A CN201510274728 A CN 201510274728A CN 104864603 A CN104864603 A CN 104864603A
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Abstract
An air-fuel ratio regulating method for a gas heating water heater comprises the steps that the fan voltage ranges and fan rotating speed ranges corresponding to a high power range, a middle power range and a low power range respectively are preset; a fan starts to rotate, whether an air pressure switch is closed or not is judged, if the air pressure switch is closed, the power range is judged, and the current rotating speed of the fan is detected. When a fan feedback module fails, the gas heating water heater can be effectively turned off, no matter in which load the whole machine runs, it can be guaranteed that the ratio of air to gas is reasonable, and then the reasonable heat efficiency is guaranteed.
Description
Technical field
The present invention relates to a kind of gas-heating water heater air-fuel ratio regulation method.
Background technology
In the prior art, gas-heating water heater only relies on blast switch to carry out shutdown protection when flue blockage, once blast switch lost efficacy, just cannot realize blocking protection; In addition, gas-heating water heater is with rotation speed of fan feedback module, each load is to there being default wind speed, feedback module is to the real-time wind speed of master board feedback blower fan, when surveying wind speed not in default wind speed range, the rotating speed of master board adjustment blower fan, but feedback module was once lose efficacy, master board just controls blower fan and operates with maximum (top) speed, now obviously be reduced to heat exchange efficiency during middle Smaller load, the ratio of air and combustion gas is unreasonable, even can cause the situation of gas-heating water heater cisco unity malfunction.For overcoming these defects, we develop gas-heating water heater air-fuel ratio regulation method.
Summary of the invention
Technical problem to be solved by this invention to provide a kind of gas-heating water heater air-fuel ratio regulation method, when blower fan feedback module lost efficacy, effectively can close gas-heating water heater, ensure that no matter complete machine runs under which kind of load, the equal ratio that can ensure air and combustion gas is reasonable, and then ensures the rational thermal efficiency.
The technical scheme that the present invention solves the employing of its technical problem is: described gas-heating water heater comprises blower fan, blast switch, master board, wind speed feedback module, and blower fan is speed-changing draught fan, and described guard method comprises the steps:
1) large, medium and small three kinds of power brackets corresponding respectively blower voltage scope, rotation speed of fan scope is preset;
2) start, blower fan rotates, and judges whether blast switch closes, if then gas-heating water heater normally works, then enters 3); If not, then 5 are entered);
3) judge power bracket, and detect current rotation speed of fan, then enter 4);
4) if rotation speed of fan is in preset range, gas-heating water heater normally works, and then reenters 3), if rotation speed of fan is not in preset range, master board adjustment rotation speed of fan, if adjustment rear fan rotating speed is not still in preset range, enters 5);
5) shut down and show failure code, then process ends.
In described step 4), the step of master board adjustment rotation speed of fan is realized by the input voltage constantly adjusting the corresponding load of blower fan.
The step of described adjustment rotation speed of fan specifically comprises the steps:
31) magnitude of voltage exported to blower fan improves or reduces a gear by master board, more again detects real-time wind speed by wind speed feedback module, then enters 32);
32) if the blower fan real-time rotate speed detected is in preset range, gas-heating water heater normally works, and then enters step 3), if the blower fan real-time rotate speed detected is not still in preset range, then enters 33);
33) judge whether master board output voltage values reaches maximum or the minimum of a value of respective range, then enters 31 if not), if then enter 5).
Described powerful scope is >=71%, the scope of middle power is >=31% and≤70%, low power scope is≤30%, the voltage range presetting high-power scope corresponding is 200V ~ 220V, the voltage range that in presetting, power bracket is corresponding is 180V ~ 200V, the voltage range presetting low power scope corresponding is 135V ~ 180V, the wind speed range presetting high-power scope corresponding is 2000rad/ min ~ 2200 rad/ min, the wind speed range that in presetting, power bracket is corresponding is 1500rad/ min ~ 2000 rad/ min, the wind speed range presetting low power range corresponding is 1000rad/ min ~ 1500 rad/ min.
Described blower fan is split-pole speed-changing draught fan.
The present invention compares produced beneficial effect with background technology: the blower voltage scope, the rotation speed of fan scope that adopt default large, medium and small three kinds of power brackets corresponding respectively due to the present invention, start, blower fan rotates, judge whether blast switch closes, if then gas-heating water heater normally works, then judge power bracket and detect rotation speed of fan, if rotation speed of fan is in preset range, gas-heating water heater normally works, if rotation speed of fan is not in preset range, master board adjustment rotation speed of fan, if adjustment rear fan rotating speed, still not in preset range, shuts down and shows the steps such as failure code, rotating speed is adopted to protect the scheme combined with blast switch protection, ensure that no matter complete machine runs under which kind of load, all can ensure that the ratio of air and combustion gas is reasonable, and then ensure the rational thermal efficiency.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is the schematic enlarged-scale view of blower fan in Fig. 1;
Fig. 3 is the schematic enlarged-scale view of Fig. 1 Wind pressure switch;
Fig. 4 is that circuit of the present invention connects block diagram;
Fig. 5 is control flow chart of the present invention.
Detailed description of the invention
Referring to Fig. 1, Fig. 2, Fig. 3, Fig. 4, the present invention includes blower fan 1, blast switch 2, gas ratio valve 3, master board 4, master board 4 is provided with MCU control unit, rotation speed of fan feedback circuit, fan speed regulation output control circuit, gas control valve regulation output circuit, rotation speed of fan feedback circuit, fan speed regulation output control circuit one end is electrically connected with blower fan 1, the other end is electrically connected with MCU control unit, gas control valve regulation output circuit on one side is electrically connected with MCU control unit, the other end is electrically connected with gas ratio valve 3, blower fan 1, partial pressure switch 2 is electrically connected with master board 4, blower fan 1 carries wind speed feedback module 11, wind speed feedback module 11 is responded to the speed of rotation speed of fan with Hall element 111 and is fed back to master board 4, after feedback signal is received in master board 4, the input voltage of blower fan 1 is increased or reduces by fan speed regulation output control circuit, thus the speed realizing rotation speed of fan regulates.
Referring to Fig. 5, in the present invention, gas-heating water heater smoke evacuation guard method, comprises the steps:
1) large, medium and small three kinds of power brackets corresponding respectively blower fan 1 voltage range, blower fan 1 range of speeds is preset;
2) start, blower fan 1 rotates, and judges whether blast switch 2 closes, if then gas-heating water heater normally works, then enters 3); If not, then 5 are entered);
3) judge power bracket, and detect current blower fan 1 rotating speed, then enter 4);
4) if blower fan 1 rotating speed is in preset range, gas-heating water heater normally works, then 3 are reentered), if blower fan 1 rotating speed is not in preset range, master board 4 adjusts blower fan 1 rotating speed, if adjustment rear fan 1 rotating speed is not still in preset range, enters 5);
5) shut down and show failure code, then process ends.
The step that in described step 4), master board 4 adjusts blower fan 1 rotating speed is realized by the input voltage constantly adjusting the corresponding load of blower fan 1.
Particularly, the step of described adjustment blower fan 1 rotating speed comprises the steps:
31) magnitude of voltage exported to blower fan 1 improves or reduces a gear by master board 4, more again detects real-time wind speed by wind speed feedback module 11, then enters 32);
32) if the blower fan detected 1 real-time rotate speed is in preset range, gas-heating water heater normally works, and then enters step 3), if the blower fan detected 1 real-time rotate speed is not still in preset range, then enters 33);
33) judge whether master board 4 output voltage values reaches maximum or the minimum of a value of respective range, then enters 31 if not), if then enter 4).
Particularly, in the present invention the power bracket of gas-heating water heater with 100% for total power, described powerful scope is >=71%, the scope of middle power is >=31% and≤70%, low power scope is≤30%, the voltage range presetting high-power scope corresponding is 200V ~ 220V, the voltage range that in presetting, power bracket is corresponding is 180V ~ 200V, the voltage range presetting low power scope corresponding is 135V ~ 180V, the wind speed range presetting high-power scope corresponding is 2000rad/ min ~ 2200 rad/ min, the wind speed range that in presetting, power bracket is corresponding is 1500rad/ min ~ 2000 rad/ min, the wind speed range presetting low power range corresponding is 1000rad/ min ~ 1500 rad/ min.Above-mentioned voltage range and the range of speeds all comprise the end value at two ends.
Above-mentioned number range is one to one, as: when high-power scope >=71%, the output voltage range that master board 4 can regulate is 200V ~ 220V, and default rotation speed of fan scope is 2000rad/ min ~ 2200 rad/ min.Suppose that the power of gas-heating water heater is chosen to be high-power, the voltage exporting to blower fan 1 of current master board 4 is 200V, if the real-time wind speed now detected is less than 2000rad/ min, then the Voltage Cortrol exporting to blower fan 1 can be 210V by master board 4, again the real-time wind speed of blower fan 1 is detected again, if wind speed is between the rad/ min of 2000rad/ min ~ 2200 in real time, then gas-heating water heater normally works, if wind speed is not still between the rad/ min of 2000rad/ min ~ 2200 in real time, then the Voltage Cortrol exporting to blower fan 1 is 220V by master board 4, output voltage now reaches the maximum voltage value of high-power scope, detect blower fan 1 rotating speed now, if rotating speed is between the rad/ min of 2000rad/ min ~ 2200, then gas-heating water heater normally works, if rotating speed is not still between the rad/ min of 2000rad/ min ~ 2200, then illustrate that air-fuel ratio is unreasonable, therefore shut down and show failure code.
The magnitude of voltage exported to blower fan 1 improves or reduces a gear by the master board 4 described in the present invention, and " gear " is here different according to different type of machines, and can be such as be adjusted to 201V from 200V, also can be adjusted to 170V from 150V.
Further, described blower fan 1 is split-pole speed-changing draught fan, carries wind speed feedback module, and structure is simple, easy to use.
The present invention is exactly by master board 4(and MCU control unit) receive the signal of the wind speed feedback module 11 on split-pole speed-changing draught fan 1, and the signal of wind speed feedback module 11 utilizes the mode of cutting magnetic induction line to draw the corresponding fast slow signal of rotating speed by Hall element 111, and master board 4(and MCU control unit) receive the order that user regulates payload, the aperture of regulating gas proportioning valve 3.By above-mentioned smoke evacuation guard method; when gas-heating water heater works in different power brackets; if by blower fan 1 voltage input levels in adjustment respective range; then gas-heating water heater is closed in the scope that blower fan 1 rotating speed is still no longer preset; and show failure code; and then guarantee that gas-heating water heater is when each load section work, the ratio that can realize air and combustion gas is reasonable, and then ensures the rational thermal efficiency.In addition, wind speed protection is protected with blast switch 2 and is combined by the present invention, if one of them lost efficacy, then another still played a protective role.
Claims (5)
1. a gas-heating water heater air-fuel ratio regulation method; it is characterized in that described gas-heating water heater comprises blower fan (1), blast switch (2), master board (4), wind speed feedback module (11); blower fan (1) is speed-changing draught fan, and described guard method comprises the steps:
1) large, medium and small three kinds of power brackets corresponding respectively blower fan (1) voltage range, blower fan (1) range of speeds is preset;
2) start, blower fan (1) rotates, and judges whether blast switch (2) closes, if then gas-heating water heater normally works, then enters 3); If not, then 5 are entered);
3) judge power bracket, and detect current blower fan (1) rotating speed, then enter 4);
4) if blower fan (1) rotating speed is in preset range, gas-heating water heater normally works, then 3 are reentered), if blower fan (1) rotating speed is not in preset range, master board (4) adjustment blower fan (1) rotating speed, if adjustment rear fan (1) rotating speed is not still in preset range, enters 5);
5) shut down and show failure code, then process ends.
2. gas-heating water heater air-fuel ratio regulation method according to claim 1, is characterized in that the step of master board in described step 4) (4) adjustment blower fan (1) rotating speed is realized by the input voltage constantly adjusting blower fan (1) corresponding load.
3. gas-heating water heater air-fuel ratio regulation method according to claim 2, is characterized in that the step of described adjustment blower fan (1) rotating speed specifically comprises the steps:
31) magnitude of voltage that master board (4) will export to blower fan (1) improves or reduces a gear, more again detects real-time wind speed by wind speed feedback module (11), then enters 32);
32) if the blower fan detected (1) real-time rotate speed is in preset range, gas-heating water heater normally works, and then enters step 3), if the blower fan detected (1) real-time rotate speed is not still in preset range, then enters 33);
33) judge whether master board (4) output voltage values reaches maximum or the minimum of a value of respective range, then enters 31 if not), if then enter 5).
4. the air-fuel ratio regulation method of the gas-heating water heater according to any one of claims 1 to 3, it is characterized in that described powerful scope is >=71%, the scope of middle power is >=31% and≤70%, low power scope is≤30%, the voltage range presetting high-power scope corresponding is 200V ~ 220V, the voltage range that in presetting, power bracket is corresponding is 180V ~ 200V, the voltage range presetting low power scope corresponding is 135V ~ 180V, the wind speed range presetting high-power scope corresponding is 2000rad/min ~ 2200 rad/ min, the wind speed range that in presetting, power bracket is corresponding is 1500rad/ min ~ 2000 rad/ min, the wind speed range presetting low power range corresponding is 1000rad/ min ~ 1500 rad/ min.
5. the air-fuel ratio regulation method of the gas-heating water heater according to any one of claims 1 to 3, is characterized in that described blower fan (1) is split-pole speed-changing draught fan.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510274728.8A CN104864603B (en) | 2015-05-27 | 2015-05-27 | Gas-heating water heater air-fuel ratio regulation method |
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| CN201510274728.8A CN104864603B (en) | 2015-05-27 | 2015-05-27 | Gas-heating water heater air-fuel ratio regulation method |
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| CN104864603A true CN104864603A (en) | 2015-08-26 |
| CN104864603B CN104864603B (en) | 2017-12-26 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109269087A (en) * | 2018-08-01 | 2019-01-25 | 广州迪森家居环境技术有限公司 | Gas water-heating furnace and its monitoring adjusting method, heating system |
| CN110220244A (en) * | 2019-05-14 | 2019-09-10 | 深圳市合信达控制系统有限公司 | A kind of method, system and burnt gas wall hanging furnace improving efficiency of combustion |
| CN111140527A (en) * | 2019-12-23 | 2020-05-12 | 华帝股份有限公司 | Control method and control system for stable operation of fan |
| CN111141030A (en) * | 2018-11-02 | 2020-05-12 | 青岛经济技术开发区海尔热水器有限公司 | Control method of gas water heater and gas water heater |
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| CN104864603B (en) | 2017-12-26 |
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