CN204176926U - The gas-fired water heater of self adaptation full premix combustion - Google Patents
The gas-fired water heater of self adaptation full premix combustion Download PDFInfo
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- CN204176926U CN204176926U CN201420601164.5U CN201420601164U CN204176926U CN 204176926 U CN204176926 U CN 204176926U CN 201420601164 U CN201420601164 U CN 201420601164U CN 204176926 U CN204176926 U CN 204176926U
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Abstract
A kind of gas-fired water heater of self adaptation full premix combustion, comprise heat exchanger, burner, blower fan, gas control valve, Gas Pipe, gas sensor, gas signal detecting unit and control circuit module, the inner chamber of heat exchanger forms closed combustion chamber, burner, gas sensor are arranged in closed combustion chamber, blower fan, Gas Pipe are communicated with burner respectively, gas control valve is connected in Gas Pipe, and gas control valve, blower fan, gas signal detecting unit, gas sensor electrically connect with control circuit module respectively.Due to the specific gas content in flue gas after the utility model employing gas sensor detection fuel gas buring, therefore it can effectively when gas component changes, make combustion gas and AIR Proportional be adjusted to new air-fuel ratio, to reach the object making combustion gas burn completely.
Description
Technical field
The utility model relates to a kind of gas-fired water heater of self adaptation full premix combustion, is particularly useful for gas-heating water heater, gas heater etc.
Background technology
In the prior art, gas-heating water heater, gas heater etc. are different from the hybrid mode of air by the combustion system, particularly combustion gas of combustion gas, can be divided into partly-premixed burning type and full premix combustion type.Wherein, full premix combustion has following characteristics:
After combustion gas and air fully mix according to stoichiometric ratio before combustion, then burn, it has many merits, as abundant in fuel gas buring, liberation is high, the thermal efficiency is high, harmful smoke discharge index is low etc.But when gas component changes, the air-fuel ratio of fuel gas buring just there occurs change, and so fuel gas buring will there will be exception.Because now combustion gas and air mixture can not burn in the best condition, the bad phenomenon such as the thermal efficiency declines, burning abnormal sound, harmful smoke discharge capacity are high will be there is, the normal use of user is even had influence on time serious, cause and there is gas component when changing, full premix combustion originally there will be the not good defect of combustion position.
For overcoming this defect, spy develops the gas-fired water heater of self adaptation full premix combustion.
Summary of the invention
Technical problem to be solved in the utility model is the gas-fired water heater that will provide a kind of self adaptation full premix combustion, it can effectively when gas component changes, combustion gas and AIR Proportional is made to be adjusted to new air-fuel ratio, to reach the object making combustion gas burn completely.
The technical scheme that the utility model solves the employing of its technical problem is: it comprises heat exchanger, burner, blower fan, gas control valve, Gas Pipe, control circuit module, the inner chamber of heat exchanger forms closed combustion chamber, burner is arranged in closed combustion chamber, air outlet, the Gas Pipe of blower fan are communicated with the air inlet of burner respectively, gas control valve is connected in Gas Pipe, and gas control valve, blower fan and control circuit module electrically connect.On this basis, it also comprises gas sensor, gas signal detecting unit, and gas sensor is arranged in closed combustion chamber, and gas signal detecting unit and gas sensor, control circuit module electrically connect.
Described gas signal detecting unit comprises sensor electrical current feedback circuit, ac high-voltage produces circuit, exchange bleeder circuit, DC voltage divider circuit, filter circuit, sensor electrical current feedback circuit one end and gas sensor electrically connect, the sensor electrical current feedback circuit other end, ac high-voltage produce circuit and electrically connect with the input exchanging bleeder circuit respectively, the output exchanging bleeder circuit is electrically connected by the input of DC voltage divider circuit and filter circuit, and output and the control circuit module of filter circuit electrically connect.
Described control circuit module comprises MCU control unit, gas control valve regulation output circuit, gas control valve feedback circuit, the input of gas control valve regulation output circuit, the output of gas control valve feedback circuit electrically connect with MCU control unit respectively, and the output of gas control valve regulation output circuit, the input of gas control valve feedback circuit electrically connect with gas control valve respectively.
Described control circuit module also comprises fan speed regulation output control circuit, rotation speed of fan feedback circuit, the input of fan speed regulation output control circuit, the output of rotation speed of fan feedback circuit electrically connect with MCU control unit respectively, and the output of fan speed regulation output control circuit, the input of rotation speed of fan feedback circuit electrically connect with blower fan respectively.
Described gas sensor is CO sensor, CO
2sensor or O
2sensor.
Described heat exchanger is provided with burner installing hole, sensor mounting hole, and burner is arranged in heat exchanger by burner installing hole, and gas sensor is arranged in heat exchanger by sensor mounting hole.
The air inlet of described blower fan is provided with blast pipe, is provided with Venturi tube in blast pipe, and the gas outlet of Gas Pipe is communicated with Venturi tube.Venturi tube effectively can improve the injection power of air and combustion gas.
The utility model compares produced beneficial effect with background technology:
1, due to the specific gas content in flue gas after the utility model employing gas sensor and gas detecting signal unit detection fuel gas buring, if the electromotive force magnitude range under the size bias combustion optimum state of the potential value that this gas content is corresponding, the rotating speed of aperture and/or blower fan that control circuit module then controls gas control valve carrys out adjusting air-fuel ratio, combustion gas is coordinated again with the ratio of air, the electromotive force magnitude range under optimum state of burning is returned to make the size of this gas electric potential signal, therefore it can effectively when gas component changes, combustion gas and AIR Proportional is made to be adjusted to new air-fuel ratio, to reach the object making combustion gas burn completely.
Accompanying drawing illustrates: Fig. 1 is structural representation of the present utility model;
Fig. 2 is that the circuit of Fig. 1 connects block diagram;
Fig. 3 is the connection block diagram of gas signal detecting unit 51 in Fig. 1;
Fig. 4 is a kind of circuit connection diagram of Fig. 3;
Fig. 5 is the concrete connection layout of gas control valve regulation output circuit, gas control valve feedback circuit in Fig. 1;
Fig. 6 is the concrete connection layout of fan speed regulation output control circuit in Fig. 1, rotation speed of fan feedback circuit.
Detailed description of the invention: below to adopt CO
2sensor is example as the gas-heating water heater of gas sensor, and the utility model is described in further detail, CO sensor, O
2the principle of sensor and CO
2sensor is identical, does not repeat statement.
Shown in Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5 and Fig. 6, the present embodiment comprises heat exchanger 1, CO
2sensor 2, burner 3, blower fan 4, control circuit module 5, blast pipe 41, Gas Pipe 8, gas control valve 6, the inner chamber of heat exchanger 1 forms closed combustion chamber 11, CO
2sensor 2, burner 3 are arranged in closed combustion chamber 11, the air outlet of blower fan 4 is communicated with the air inlet of burner 3, the air inlet of blower fan 4 is provided with blast pipe 41, Venturi tube 42 is provided with in blast pipe 41, the gas outlet of Gas Pipe 8 is communicated with Venturi tube 42 (namely Gas Pipe 8 is communicated with the air inlet of burner 3 by blower fan 4), gas control valve 6 is connected in Gas Pipe 8, and gas control valve 6, blower fan 4 electrically connect with control circuit module 5, CO
2sensor 2 passes through CO
2gas signal detecting unit 51 also electrically connects with control circuit module 5.
Combustion gas and oxygen mix, the CO generated after burning
2for definite value, when burning insufficient, the CO in combustion product
2content certainly leads to change, CO
2sensor 2 detects the CO in combustion product by gas sensor
2concentration, thus by CO
2potential value corresponding to concentration export, by measuring electromotive force thus measuring CO
2concentration.CO
2sensor 2 electrical conductivity is high, sensitivity and selectivity characteristic good, simultaneously also there is the features such as reliable and stable.
Gas component in the utility model refers to composition and the content of combustion gas, according to full premix principle, when combustion gas because component changes, and make to change with the air-fuel ratio of air, if now gas control valve 6 can not adjust accordingly, then component change after combustion gas just can not realize burning completely with air, will to burning produce adverse influence.
Gas-heating water heater designer passes through gas-heating water heater CO under best combustion
2the potential value produced and smoke components take multiple measurements, and determine the CO under best combustion
2the scope of the potential value produced, is write this potential value scope as automatically controlled program and is input in control circuit module 5.
Shown in accompanying drawing 3 and accompanying drawing 4, described CO
2gas signal detecting unit 51 comprises sensor electrical current feedback circuit 511, ac high-voltage produces circuit 515, exchange bleeder circuit 512, DC voltage divider circuit 513, filter circuit 514, sensor electrical current feedback circuit 511 one end and gas sensor 2 electrically connect, sensor electrical current feedback circuit 511 other end, ac high-voltage produces circuit 515 and electrically connects with the input exchanging bleeder circuit 512 respectively, the output exchanging bleeder circuit 512 is electrically connected by the input of DC voltage divider circuit 513 with filter circuit 514, output and the control circuit module 5 of filter circuit 514 electrically connect.
Referring to accompanying drawing 5, described control circuit module 5 comprises MCU control unit, gas control valve regulation output circuit, gas control valve feedback circuit, the input of gas control valve regulation output circuit, the output of gas control valve feedback circuit electrically connect with MCU control unit respectively, and the output of gas control valve regulation output circuit, the input of gas control valve feedback circuit electrically connect with gas control valve 6 respectively.When needing the potential value regulating CO2 to produce, MCU control unit passes through gas control valve regulation output circuit by the signal of telecommunication to gas control valve 6, the aperture of adjustment gas control valve 6, then the signal feedback that received by gas control valve 6 of gas control valve feedback circuit is to MCU control unit, judges whether gas control valve 6 receives the complete signal of telecommunication.
Referring to accompanying drawing 6, described control circuit module 5 also comprises fan speed regulation output control circuit, rotation speed of fan feedback circuit, the input of fan speed regulation output control circuit, the output of rotation speed of fan feedback circuit electrically connect with MCU control unit respectively, and the output of fan speed regulation output control circuit, the input of rotation speed of fan feedback circuit electrically connect with blower fan 4 respectively.When needs regulate CO
2during the potential value produced, MCU control unit passes through fan speed regulation output control circuit by signal of telecommunication fan 4, the wind speed of adjustment blower fan 4, then the signal feedback that received by blower fan 4 of rotation speed of fan feedback circuit is to MCU control unit, judges whether blower fan 4 receives the complete signal of telecommunication.
Namely control circuit module 5 changes air-fuel ratio by the aperture of regulating gas control valve 6 and/or the rotating speed of blower fan 4, thus makes CO
2the potential value produced maintains in normal range (NR).Both can regulating gas control valve and then control into gas quantity separately, blower fan 4 rotating speed also can be regulated separately to regulate into air capacity, if the CO detected
2the potential value produced is comparatively large with the value deviation preset, can the aperture of regulating gas control valve 6 and the rotating speed of blower fan 4 simultaneously, with the fastest speed by air-fuel ratio regulation to optimum state.
Heat exchanger 1 is provided with burner installing hole, sensor mounting hole, and burner 3 is arranged in heat exchanger 1 by burner installing hole, CO
2sensor 2 is arranged in heat exchanger 1 by sensor mounting hole, easy for installation.
During work, CO
2gas signal detecting unit 51 is constantly by CO
2the CO that sensor 2 detects
2the potential value signal transmission produced to control circuit module 5, if fuel gases calorific value changes or gas component changes, so that the actual CO that detects
2the potential value produced departs from settings, then control circuit module 5 outputs signal to gas control valve 6 and/or blower fan 4 regulates, and combustion gas is mated again, to make CO with AIR Proportional
2the potential value produced returns within the scope of settings.
Gas control valve 6 exports a current value, namely can a corresponding fixing gas flow.When gas control valve 6 output current is certain, if CO
2the potential value produced exceedes certain scope, just illustrates that machine is not in normal combustion conditions, then needs the change aperture of gas control valve 6 and/or the rotating speed of blower fan 4 to adapt to the change of combustion conditions, finally reach best operating mode.
The utility model is when gas component changes, gas-heating water heater can be made to adapt to the change of combustion gas, fast automatic air and combusted proportion to be regulated, combustion gas and AIR Proportional is made to be adjusted to new air-fuel ratio, regulating gas control valve 6 and/or blower fan 4 make mist reach optimal combustion state, to reach the object making combustion gas burn completely, thus effectively avoid occurring that the thermal efficiency declines, burning abnormal sound, harmful smoke discharge high bad phenomenon, and then ensure the normal use of user.
Claims (7)
1. the gas-fired water heater of a self adaptation full premix combustion, comprise heat exchanger (1), burner (3), blower fan (4), gas control valve (6), Gas Pipe (8), control circuit module (5), the inner chamber of heat exchanger (1) forms closed combustion chamber (11), burner (3) is arranged in closed combustion chamber (11), the air outlet of blower fan (4), Gas Pipe (8) is communicated with the air inlet of burner (3) respectively, gas control valve (6) is connected in Gas Pipe (8), gas control valve (6), blower fan (4) and control circuit module (5) electrically connect, characterized by further comprising gas sensor (2), gas signal detecting unit (51), gas sensor (2) is arranged in closed combustion chamber (11), gas signal detecting unit (51) and gas sensor (2), control circuit module (5) electrically connects.
2. the gas-fired water heater of self adaptation full premix combustion according to claim 1, it is characterized in that described gas signal detecting unit (51) comprises sensor electrical current feedback circuit (511), ac high-voltage produces circuit (515), exchange bleeder circuit (512), DC voltage divider circuit (513), filter circuit (514), sensor electrical current feedback circuit (511) one end and gas sensor (2) electrically connect, sensor electrical current feedback circuit (511) other end, ac high-voltage produces circuit (515) and electrically connects with the input exchanging bleeder circuit (512) respectively, the output exchanging bleeder circuit (512) is electrically connected by the input of DC voltage divider circuit (513) with filter circuit (514), output and the control circuit module (5) of filter circuit (514) electrically connect.
3. the gas-fired water heater of self adaptation full premix combustion according to claim 1, it is characterized in that described control circuit module (5) comprises MCU control unit, gas control valve regulation output circuit, gas control valve feedback circuit, the input of gas control valve regulation output circuit, the output of gas control valve feedback circuit electrically connect with MCU control unit respectively, and the output of gas control valve regulation output circuit, the input of gas control valve feedback circuit electrically connect with gas control valve (6) respectively.
4. the gas-fired water heater of self adaptation full premix combustion according to claim 3, it is characterized in that described control circuit module (5) also comprises fan speed regulation output control circuit, rotation speed of fan feedback circuit, the input of fan speed regulation output control circuit, the output of rotation speed of fan feedback circuit electrically connect with MCU control unit respectively, and the output of fan speed regulation output control circuit, the input of rotation speed of fan feedback circuit electrically connect with blower fan (4) respectively.
5. the gas-fired water heater of the self adaptation full premix combustion according to any one of Claims 1 to 4, is characterized in that described gas sensor (2) is CO sensor, CO
2sensor or O
2sensor.
6. the gas-fired water heater of the self adaptation full premix combustion according to any one of Claims 1 to 4, it is characterized in that described heat exchanger (1) is provided with burner installing hole, sensor mounting hole, burner (3) is arranged in heat exchanger (1) by burner installing hole, and gas sensor (2) is arranged in heat exchanger (1) by sensor mounting hole.
7. the gas-fired water heater of the self adaptation full premix combustion according to any one of Claims 1 to 4, it is characterized in that the air inlet of described blower fan (4) is provided with blast pipe (41), be provided with Venturi tube (42) in blast pipe (41), the gas outlet of Gas Pipe (8) is communicated with Venturi tube (42).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420601164.5U CN204176926U (en) | 2014-10-17 | 2014-10-17 | The gas-fired water heater of self adaptation full premix combustion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420601164.5U CN204176926U (en) | 2014-10-17 | 2014-10-17 | The gas-fired water heater of self adaptation full premix combustion |
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| Publication Number | Publication Date |
|---|---|
| CN204176926U true CN204176926U (en) | 2015-02-25 |
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ID=52565734
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420601164.5U Active CN204176926U (en) | 2014-10-17 | 2014-10-17 | The gas-fired water heater of self adaptation full premix combustion |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104296392B (en) * | 2014-10-17 | 2017-01-25 | 广东万和新电气股份有限公司 | Gas water heating device capable of realizing self-adaptive fully-premixed combustion |
| CN110081613A (en) * | 2019-04-15 | 2019-08-02 | 青岛经济技术开发区海尔热水器有限公司 | A kind of control method and gas heater of gas heater |
| CN111947296A (en) * | 2020-07-21 | 2020-11-17 | 华帝股份有限公司 | Fully-premixed gas water heater and control method |
-
2014
- 2014-10-17 CN CN201420601164.5U patent/CN204176926U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104296392B (en) * | 2014-10-17 | 2017-01-25 | 广东万和新电气股份有限公司 | Gas water heating device capable of realizing self-adaptive fully-premixed combustion |
| CN110081613A (en) * | 2019-04-15 | 2019-08-02 | 青岛经济技术开发区海尔热水器有限公司 | A kind of control method and gas heater of gas heater |
| CN111947296A (en) * | 2020-07-21 | 2020-11-17 | 华帝股份有限公司 | Fully-premixed gas water heater and control method |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |