CN1548805A - Air ratio control boiler - Google Patents
Air ratio control boiler Download PDFInfo
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- CN1548805A CN1548805A CNA031313833A CN03131383A CN1548805A CN 1548805 A CN1548805 A CN 1548805A CN A031313833 A CNA031313833 A CN A031313833A CN 03131383 A CN03131383 A CN 03131383A CN 1548805 A CN1548805 A CN 1548805A
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Abstract
The present invention is one boiler with controlled air proportion. Cheap AC blower, current proportion gas valve and air amount sensor are used, and the current proportion gas valve is controlled directly by the air amount to produce proper gas amount in whole air amount range. Optimal heat amount may be supplied to produce hot water in the set temperature. Even if in abnormal weather condition, the boiler may be ignited in optimal condition to reach optimal burning performance. The present invention has the advantages of high efficiency and saving in fuel.
Description
Technical field
The present invention relates to a kind of AIR Proportional control boiler, in more detail, the present invention relates to a kind of cheap AC air blast (being AC air blower) and current ratio air valve and air flow sensor of using, by directly controlling the current ratio air valve by air quantity in the gamut of air quantity the amount of adjustments of gas, realize to use cheap equipment and the AIR Proportional control boiler that can in the gamut of air quantity, control expeditiously.
Background technology
The heater unit and the hot-water boiler that use in the general family are roughly divided into oil burning boiler and gas fired-boiler according to the fuel that uses.Wherein, recently since, for reduce atmosphere pollution and easy to use for the purpose of, mainly use gas fired-boiler, as its fuel, use liquefied natural gas (LNG).
Gas fired-boiler according to the heat exchanger of heating water, is divided into condensing and on-condensing.Wherein, the gas fired-boiler of condensing utilizes the direct heating water of the combustion heat, and, by absorbing the cohesion latent heat of the gas of discharging once more, so can make the thermal efficiency reach maximum.
Now an example as the general condensation gas boiler that uses is described, gas point that burning blowtorch (burner) will mix with air is set on top fights and makes it to burn down, in being located at the Heating installation heat exchanger of its underpart, utilize high-temperature combustion gas that fluid (water perhaps heats) is heated, by heated fluid like this is circulated, implement the heating installation running in room and room.
And, make the triple valve action during hot water running, to be supplied to the hot water in room and room to cut off, its conversion is supplied to the hot water supply heat exchanger that is set up in parallel, and use as heating source, the hot water supply is continued supply and backwater to the other parts of the hot water supply heat exchanger that is cut off and contacts and heat with hot water, the water of heating is used to wash one's face and bathing pool.
The gas fired-boiler of Gou Chenging like this, be divided into various forms according to its control mode and air-tight state, AIR Proportional control mode particularly, be to measure after the pressure of outside leaked-in air, with the air pressure of being measured fuel supplying in the previous combustion blowtorch pro rata, so, by supplying the fuel of correct amount pro rata with leaked-in air pressure, can improve efficiency of combustion, suppress the discharge of pernicious gas to greatest extent, prevent the pollution of environment.
Promptly, owing to only depending on air pressure, the variable of the amount of adjustments of gas changes, so, even the proportion control part to air valve is not controlled especially, also can discharge a certain amount of gas with respect to certain air pressure, always have certain air ratio, so, different with on/off formula and current ratio control mode, can correctly carry out proportion control.
For this AIR Proportional control formula boiler, file an application with the title of " AIR Proportional control formula condensing boiler " by the applicant, by Korean Patent open (publication number 10-2000-26741,2000.5.15) and register (No. the 270900th, patent number, 2000.8.8 registration).Fig. 1 is the structure chart of the general AIR Proportional control condensing boiler of expression, and Fig. 2 is the block diagram that the general air of expression is controlled the structure of condensing boiler side by side.
At first, as shown in Figure 1, the condensation gas fired-boiler is regulating air pressure according to the variations in temperature of extraneous air, and the AIR Proportional control mode of always supplying air in certain amount turns round.As its overall structure, by constituting: have that action by DC air blast 10 sucks the intake guide 3 of extraneous air and the discharge gas that will burn is discharged to the hermetic type main body 2 of the exhaust manifolds 20 of outside with the lower part; Will be by by first and second magnetic valve 46,46 ' and the burning blowtorch 12 of the gas supply of AIR Proportional control valve 47 and the mist burning that constituted by DC air blast 10 inhaled airs and the sensible heat portion heat exchanger 14 that the water that will heat heats, the burner 4 that is assembled into one with latent heat portion heat exchanger 16; The hot water heat exchanger 34 that the heating water that is heated by sensible heat portion heat exchanger 14 one sides by one side heats the water of supplying; To be supplied to the circulating pump 22 of aforementioned latent heat portion heat exchanger 16 through the heating water of heating water filter 24 and moisture trap 26; The expansion tank 48 of the part of the heating water that the action that storage reaches anti-excess pressure valve 32 according to triple valve 28 flows into.
In addition, in order to carry out AIR Proportional control, if from pressure identification part 51 input pressures of perception from the AIR Proportional control valve 47 of the air pressure test section 50 of being located at the DC air blast 10 inhaled air pressure on the suction chamber 6 are set, the gas that controller 40 usefulness are drawn according to the air pressure of 51 perception in air pressure identification part makes boiler combustion, and the signal of reception temperature sensor, utilize the data computation heat that whether reaches design temperature, rotating speed to DC air blast 10 carries out dutycycle (duty, デ ユ one テ イ) control, only the rotating speed with necessity makes air pressure variations, regulate the gas discharge rate of AIR Proportional control valve 47, regulate the amount of the gas that is supplied to burning blowtorch 12.
In more detail, burning blowtorch 12 is set on the top of burner 4, this burning blowtorch 12 is that the action that utilizes DC air blast 10 is burnt by the supply air that suction chamber 6 is inhaled into, below burning blowtorch 12, dispose sensible heat portion heat exchanger 14 and latent heat portion heat exchanger 16 successively.Sensible heat portion heat exchanger 14 directly contacts and makes it to carry out the process of heat exchange at the sensible heat that produces from burning blowtorch 12, the water that will heat heating, the latent heat heating water that latent heat portion heat exchanger 16 produces when utilizing thermo-contact with discharge gas.
Discharge gas by latent heat portion heat exchanger 16 is released to the outside by exhaust manifolds 20, and the condensed water that produces in heat exchanging process is discharged to the outside after focusing on the hood 18.By the action of circulating pump 22, one side by the temperature of latent heat portion heat exchanger 16 and the heated heating water of sensible heat portion heat exchanger 14 one sides, by thermistor 52 perception, is sent to controller 40 successively.
On the bottom, left side of boiler, dispose make heating water circulation circulating pump 22.When circulating pump 22 actions, the heating water that finishes indoor heating flows into heating water filter 24 via circuit L1.At heating water filter 24, remove the impurity that is included in the heating water, the heating water after filtering is sent to the moisture trap 26 on top.Moisture trap 26 is used for the air that is included in heating water is discharged, and by the steam vent on top air is discharged.
Too the rise overvoltage of usefulness of the pressure that is provided with the water that prevents to heat between heating water filter 24 and moisture trap 26 prevents valve 32, and the part of heating water is sent to expansion tank 48 and regulates pressure.Heating water conservancy by moisture trap 24 is supplied to after the latent heat portion heat exchanger 16 via circuit L2 with the action of circulating pump 22, and one side is heated by sensible heat portion heat exchanger 14 one sides, is discharged to circuit L3.The heating water of discharging by circuit L3 is supplied to indoor by the action of triple valve 28.
Among the figure, express the heat exchanger that the heat of utilizing heating water obtains hot water in the middle lower portion of boiler.After the cold water that flow of hot water will flow into via circuit L6 in the action by switch 36 was passing through to heat in hot water heat exchanger 34 the process, L7 was discharged from via circuit.34 one-tenth block form structures of hot water heat exchanger of the present invention are set in than in the littler zone of prior art by the temperature deviation scope that will be controlled, improve the operation range of boiler, can suppress the discharge of pernicious gas to greatest extent.
Lower right side at boiler is provided with gas supply device.From first and second magnetic valve 46,46 ' beginning, the output signal of the DC air blast 10 that transmits according to slave controller 40, continue the rotating speed of DC air blast 10 is carried out dutycycle control, utilization makes the action of the AIR Proportional control valve 47 that the gas discharge rate changes via the gas that circuit L8 flows into, and is supplied to the nozzle 8 on the top of burner 4 via circuit L9.At this moment, change the supply of gas, and compensate the supply of the variation that is accompanied by extraneous air by action by AIR Proportional control valve 47.The gas of supply is by the spark ignition combustion that transmits by ignition transformer 42 and fire rod like this, and a series of like this combustion process is controlled by the controller 40 of the input signal of the indoor temperature adjuster 38 of accepting user's operation.
Secondly, according to block diagram shown in Figure 2, the course of action of AIR Proportional control formula condensing boiler is described.
Various input signals such as desirable indoor temperature that controller 40 is selected with the temperature of the heating water of thermistor 52 perception with by the user and desirable actuation time are that basic calculation goes out the fuel quantity based on optimal air-fuel ratio.Secondly, signal is sent to stepless control DC air blast 10,, is accompanied by the variation of air pressure, will be supplied to the fuel quantity of burning blowtorch 12 to be controlled at optimum state by dutycycle control based on the fuel quantity that calculates.Controller 40 also is sent to output signal first and second magnetic valve 46,46 ' and ignition transformer 42 etc. except that the DC air blast, make the normal operation of boiler become possibility.
As mentioned above, in AIR Proportional control boiler, when calculating heat, rotating speed to DC air blast 10 carries out dutycycle control, when only making air pressure variations with the rotating speed of necessity, be accompanied by the gas discharge rate of the variation adjusting AIR Proportional control valve 47 of air pressure, the amount of regulating the gas that is supplied to burning blowtorch 12.
Promptly, in the prior art, under by the AC air blast that usually in boiler, uses and current ratio control valve and the situation of wind pressure sensor, owing to can not grasp the air quantity that is supplied to the combustion chamber, and stop up under the situation of flue against the wind being blown into based on temperature control burning blowtorch, promptly, under unusual condition,, exist and when igniting, can produce noise, break out and light a fire and misfire because air quantity and gas do not conform to ratio, in the middle of combustion process, problem such as noise can take place and misfire.
In order to address these problems, recently, as previously described, use AIR Proportional control valve 47 as air valve, because the pressure high according to the characteristic needs of this AIR Proportional control valve 47, so use DC air blast 10.
But, state before use under the situation of DC air blast 10 and AIR Proportional control valve 47, exist such problem: the costing an arm and a leg of product, the amount of the gas of being set by AIR Proportional control valve 47 misfits mutually with respect to whole air quantity, produce error, the price of contrast parts, and impracticable, and efficient is low.
In addition, owing to use the DC air blast 10 of high price, exist the problem of the price that increases boiler.
Summary of the invention
The present invention proposes in order to solve foregoing problems, its purpose is to provide a kind of AIR Proportional control boiler, described boiler uses cheap AC air blast and current ratio air valve, and the actual air volume sensor is to replace wind pressure sensor of the prior art, utilize air quantity directly to control the current ratio air valve, can be in the scope of whole air quantity the amount of adjustments of gas, use cheap equipment just can in the scope of whole air quantity, control expeditiously thus.
In order to realize aforementioned purpose, the invention provides a kind of AIR Proportional control boiler, can regulate the amount of the supplied fuel that is associated with inhaled air, wherein, comprising: suck the AC air blast that air is used by intake guide; Be arranged in the suction chamber, measure air flow sensor by the amount usefulness of aforementioned AC air blast inhaled air; Regulate the current ratio air valve of the amount usefulness of the gas of being supplied; Control is by the rotating speed (RPM) of the AC air blast that heat determined, the air quantity of measuring according to air flow sensor is regulated the controller of current ratio air valve.
Below, foregoing action of the present invention is described.
With controller the rotating speed that calculates the AC air blast behind the heat is carried out RPM control, when only amount of air drawn being changed with the rotating speed of necessity, by variation by air flow sensor input air amount, be converted at present the necessary optimum gas scale of construction current ratio air valve controlled, thus can be in the scope of whole air quantity the amount of adjustments of gas.
Below, based on description of drawings the preferred embodiments of the present invention.In addition, present embodiment does not limit interest field of the present invention, just puts forward as an example, and simultaneously, the part identical with prior art constructions used identical symbol and title.
Description of drawings
Fig. 1 is the structure chart of the general AIR Proportional control condensing boiler of expression;
Fig. 2 is the block diagram of the structure of the general AIR Proportional control condensing boiler of expression;
Fig. 3 is the block diagram of expression according to the structure of AIR Proportional control boiler of the present invention.
Wherein, description of reference numerals is as follows:
10:DC air blast 12: burning blowtorch
14: sensible heat portion heat exchanger 16: latent heat portion heat exchanger
18: hood 20: exhaust manifolds
22: circulating pump 24: the heating water filter
26: moisture trap 34: hot water heat exchanger
38: indoor temperature adjuster 40,40 ': controller
46,46 ': first, second magnetic valve 47: AIR Proportional control valve
50: air pressure test section 51: the air pressure identification part
60:AC air blast 70: air flow sensor
80: the current ratio air valve
The specific embodiment
Fig. 3 is the block diagram of expression according to the structure of AIR Proportional control boiler of the present invention.Here, as shown in the figure, it is by constituting with the lower part: suck the AC air blast 60 that air is used by intake guide 3; Be arranged in the suction chamber 6, measure the air flow sensor of using by aforementioned AC air blast amount of air drawn 70; The current ratio air valve 80 that the gas flow that adjusting is supplied is used; The thermistor 52 of the temperature of perception heating water; The user operates the indoor temperature adjuster 38 that a series of combustion processes are used; Make the ignition transformer 42 that produces the spark and the usefulness of lighting a fire in the gas of being supplied; Make the circulating pump 22 of heating water circulation; Regulate first and second magnetic valve 46,46 ' that institute's supplied fuel amount is used; And controller 40 '; Wherein, described controller 40 ' is the heat of the various input signal calculating optimums of the indoor temperature adjuster 38 selected according to the heating coolant-temperature gage that utilizes thermistor 52 perception with by the user etc., control is by the RPM of the AC air blast 60 that heat determined, make the ignition transformer 42 and first and second magnetic valves 46 by the air quantity that utilizes air flow sensor 70 to measure, 46 ' and circulating pump 22 action, current ratio air valve 80 is regulated.
Thereby, when the user makes boiler carry out warming operation by indoor temperature adjuster 38, at first use controller 40 ' that circulating pump 22 and AC air blast are connected, utilize air flow sensor 70 to detect the air quantity that is supplied to the combustion chamber at present, the RPM of AC air blast 60 is controlled make and become the necessary air quantity of igniting.
In addition, when becoming best air quantity, ignition transformer 42 is connected, make the necessary air quantity of igniting keep opening the current air quantity necessary first or second magnetic valve 46,46 ' after the regular hour, make it to disconnect ignition transformer after the igniting beginning warming operation.
As previously described, controller 40 ' makes ignition of the boiler, utilize thermistor 52 perception heating coolant-temperature gage, proportion of utilization control formula calculates required heat, so that the heating coolant-temperature gage that present heating coolant-temperature gage proportion control is become to set, calculate the RPM of AC air blast 60 according to this calorimeter, utilize this value control AC air blast 60, institute's supplied fuel amount is that the airflow value that will utilize air flow sensor 70 to detect is converted into current combustion blowtorch 12 necessary optimum fuel amounts, utilize this Numerical Control current ratio air valve 80, the fuel metering amount.
As mentioned above, the present invention uses cheap AC air blast and current ratio air valve and air quantity to pass Sensor utilizes air quantity directly to control electric power ratio air valve, so, can in whole air quantity scope, make combustion The material amount all is well suited for, and can supply the best institute that makes present heating water temperature proportion control become design temperature to use Calorific requirement, even under unusual weather or condition, also can make boiler under optimal conditions safety Igniting is burnt, so, have the combustibility of improvement, raise the efficiency the advantages such as fuel saving expense.
In addition, has such advantage, namely by using cheap AC air blast and current ratio Air valve, can be further cheap and can use on safety convenient ground.
Claims (1)
1, a kind of AIR Proportional is controlled boiler, can regulate the amount of the supplied fuel that is associated with inhaled air, it is characterized in that, comprising:
Suck the AC air blast that air is used by intake guide;
Be arranged in the suction chamber, measure air flow sensor by the amount usefulness of aforementioned AC air blast inhaled air;
Regulate the current ratio air valve of the amount usefulness of the gas of being supplied;
Control is by the rotating speed of the AC air blast that heat determined, the air quantity of measuring according to air flow sensor is regulated the controller of current ratio air valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA031313833A CN1548805A (en) | 2003-05-15 | 2003-05-15 | Air ratio control boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA031313833A CN1548805A (en) | 2003-05-15 | 2003-05-15 | Air ratio control boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1548805A true CN1548805A (en) | 2004-11-24 |
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ID=34322860
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA031313833A Pending CN1548805A (en) | 2003-05-15 | 2003-05-15 | Air ratio control boiler |
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| Country | Link |
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| CN (1) | CN1548805A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102077027A (en) * | 2008-06-27 | 2011-05-25 | 普罗梅康过程和测量技术康拉德斯有限责任公司 | Device and method for controlling the fuel-air ratio during the combustion of ground coal in the firing system of a coal power plant |
| CN101415996B (en) * | 2006-07-04 | 2011-07-13 | 三浦工业株式会社 | Boiler |
| CN101490476B (en) * | 2006-07-07 | 2014-05-28 | 阿尔斯通技术有限公司 | Method for controlling the combustion air supply in a steam generator that is fueled with fossil fuels |
| CN103827584A (en) * | 2011-07-13 | 2014-05-28 | 普美康过程控制和测量技术康拉德有限责任公司 | Device and method for controlling the fuel-air ratio in the combustion of ground coal in a firing system of a coal-fired power station |
| CN104214826A (en) * | 2014-09-25 | 2014-12-17 | 无锡昊瑜节能环保设备有限公司 | Energy-saving control system for mini-boiler |
| CN104807036A (en) * | 2015-04-13 | 2015-07-29 | 山西太钢不锈钢股份有限公司 | Temperature control method of continuous fuel gas heating furnace |
| CN106287806A (en) * | 2016-09-29 | 2017-01-04 | 长沙开元仪器股份有限公司 | The automatic flow control system of a kind of high temperature combustion furnace and method of work thereof |
-
2003
- 2003-05-15 CN CNA031313833A patent/CN1548805A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101415996B (en) * | 2006-07-04 | 2011-07-13 | 三浦工业株式会社 | Boiler |
| CN101490476B (en) * | 2006-07-07 | 2014-05-28 | 阿尔斯通技术有限公司 | Method for controlling the combustion air supply in a steam generator that is fueled with fossil fuels |
| CN102077027A (en) * | 2008-06-27 | 2011-05-25 | 普罗梅康过程和测量技术康拉德斯有限责任公司 | Device and method for controlling the fuel-air ratio during the combustion of ground coal in the firing system of a coal power plant |
| CN102077027B (en) * | 2008-06-27 | 2013-05-15 | 普罗梅康过程和测量技术康拉德斯有限责任公司 | Device and method for controlling the fuel-air ratio during the combustion of ground coal in the firing system of a coal power plant |
| CN103827584A (en) * | 2011-07-13 | 2014-05-28 | 普美康过程控制和测量技术康拉德有限责任公司 | Device and method for controlling the fuel-air ratio in the combustion of ground coal in a firing system of a coal-fired power station |
| CN103827584B (en) * | 2011-07-13 | 2016-01-13 | 普美康过程控制和测量技术康拉德有限责任公司 | For controlling the apparatus and method of fuel-air ratio in process of coal combustion in coal-burning power plant's combustion apparatus |
| CN104214826A (en) * | 2014-09-25 | 2014-12-17 | 无锡昊瑜节能环保设备有限公司 | Energy-saving control system for mini-boiler |
| CN104807036A (en) * | 2015-04-13 | 2015-07-29 | 山西太钢不锈钢股份有限公司 | Temperature control method of continuous fuel gas heating furnace |
| CN106287806A (en) * | 2016-09-29 | 2017-01-04 | 长沙开元仪器股份有限公司 | The automatic flow control system of a kind of high temperature combustion furnace and method of work thereof |
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