CN107339808B - A kind of method for controlling combustion of the gas heater based on lambda sensor - Google Patents
A kind of method for controlling combustion of the gas heater based on lambda sensor Download PDFInfo
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- CN107339808B CN107339808B CN201710059606.6A CN201710059606A CN107339808B CN 107339808 B CN107339808 B CN 107339808B CN 201710059606 A CN201710059606 A CN 201710059606A CN 107339808 B CN107339808 B CN 107339808B
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- 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
Abstract
The present invention relates to a kind of method for controlling combustion of gas heater based on lambda sensor, the gas heater includes the first electromagnetic proportional valve for adjusting combustion parameter, second electromagnetic proportional valve, blower, igniter, burner and main valve, and master board, there are three types of operating modes for master board tool, corresponding combustion parameter is corresponding under every kind of operating mode, and under one section of operating mode, first electromagnetic proportional valve is opened, under two sections of operating modes, second electromagnetic proportional valve is opened, under three sections of operating modes, first electromagnetic proportional valve and the second electromagnetic proportional valve are opened.The present invention passes through the size for judging Actual combustion power and firing power, then further judge whether the oxygen concentration numerical value of lambda sensor detection deviates preset normal oxygen concentratio numerical value, then dynamic adjustment is carried out to the combustion parameter of gas heater, to guarantee that burner will not be blown out when wind pressure is excessive.
Description
Technical field
The present invention relates to a kind of method for controlling combustion of gas heater based on lambda sensor.
Background technique
Domestic gas-fired water heater during use will face many uncontrollable factors, as flow of inlet water fluctuation,
Wind pressure caused by the purity of burning gases, the range of the air pressure of burning gases, the external world blow is excessive etc., these factors may shadow
It rings the temperature persistance of gas heater or gas heater is caused to can not work normally.Machine caused by wherein wind pressure is excessive without
The problem of method is burnt and brought becomes increasingly conspicuous, and such as the high-rise buildings in coastal cities, water heater air outlet often has very big wind-force,
After wind-force reaches some strength water heater will occur ignition point not or the problems such as being blown out suddenly when being burning, this
A little problems decline the accommodative ability of environment of domestic gas-fired water heater.For the excessive problem of wind pressure, this paper presents one kind to resist
The machine that the AC blower fan system when wind pressure is excessive may be implemented in wind pressure technology can also burn without being blown out.
In addition, domestic gas-fired water heater forms Smaller load area according to the intercombination of difference solenoid valve when water heater working
With big loading zone, remain that a region is burnt always after water heater working, our this spline structure is referred to as to have Chang Ming
Fiery structure and variable open fire structure.There is the gas heater structure of Chang Minghuo structure shown in Figure 1, this gas heater is deposited
In 2 kinds of operating modes: when solenoid valve SV1 is individually opened, gas water heater working is in 1 stage mode, when solenoid valve SV1 and electromagnetism
When valve SV2 is opened simultaneously, gas water heater working is in 2 stage modes.Since the corresponding region solenoid valve SV1 is burnt always
(referred to as Chang Minghuo), therefore be not in flame-out risk when 1 stage mode and 2 stage modes mutually switch.
The gas heater structure of variable open fire structure is shown in Figure 2, and there are 3 Working moulds for this kind of gas heater
Formula: solenoid valve SV1 individually opens work in 1 stage mode, and solenoid valve SV2 individually opens work in 2 stage modes, as solenoid valve SV1
Work is in 3 stage modes when opening simultaneously with solenoid valve SV2, above-mentioned 3 kinds of operating modes there is no have a certain section always in burning feelings
Condition, i.e., variable open fire, just will appear flame-out risk when 1 stage mode and 2 stage modes mutually switch at this time.
Summary of the invention
Primary technical problem to be solved by this invention is that a kind of combustion when wind pressure is excessive is provided for the above-mentioned prior art
The method for controlling combustion for the gas heater based on lambda sensor that burner will not be blown out.
The further technical problems to be solved of the present invention, which are to provide one kind burner when wind pressure is excessive, will not be blown out, be divided
Duan Huoli is not in the method for controlling combustion of the gas heater based on lambda sensor of flame-out risk when switching.
The technical scheme of the invention to solve the technical problem is: a kind of Combustion System side of gas heater
Method, the gas heater include burner, for the igniter to burner ignition, enter burner for controlling
How much the first how many electromagnetic proportional valve of interior burning gases, the second electromagnetic proportional valve enter in combustion chamber air capacity for controlling
DC fan, be arranged on admission line for being switched on or off the main valve into the burning gases in gas heater, use
In the master of the first electromagnetic proportional valve current value of control burning, the second electromagnetic proportional valve current value, rotation speed of fan and igniter opening and closing
Control panel, and the outlet valve being connect with master board；There are three types of operating modes: one section of operating mode, two for the master board tool
Section operating mode and three sections of operating modes, under one section of operating mode, main valve and the first electromagnetic proportional valve are opened, the second electromagnetism ratio
Example valve is closed；Under two sections of operating modes, main valve and the second electromagnetic proportional valve are opened, and the first electromagnetic proportional valve is closed；At three sections
Under operating mode, main valve, the first electromagnetic proportional valve and the second electromagnetic proportional valve are opened, it is characterised in that: in gas heater
Exhaust ports the lambda sensor for acquiring exhaust ports oxygen density value is installed, lambda sensor is connect with master board, institute
It states master board and carries out Combustion System as follows:
Step 1: in the standby state, after the outlet valve of gas heater is opened, whether detection flow of inlet water is greater than setting
Threshold value, if so, executing step 2, if not being, return step one；
Step 2: blower executes step 3 after running the first setting time according to preset preceding cleaning wind speed；
Step 3: blower is run according to preset igniting wind speed, step 4 is then executed；
Step 4: main valve open, the first electromagnetic proportional valve are opened, the second electromagnetic proportional valve is closed, igniter opens igniting,
Then step 5 is executed；
Step 5: judging whether to light a fire successfully, if it is successful, executing one section of operating mode, make burner, blower according to one
Combustion parameter work under section operating mode, then executes step 6, such as unsuccessful, exports fault-signal；
Step 6: calculating currently practical combustion power, judge whether currently practical combustion power is less than ignition power,
If so, executing step 7, if not being, step 8 is executed；
Step 7: judge whether the oxygen concentration numerical value of lambda sensor detection deviates preset normal oxygen concentratio numerical value, if so,
Improve rotation speed of fan makes burner, blower according to the combustion under one section of operating mode if not being to continue to execute one section of operating mode
Parameter work is burnt, step 8 is then executed；
Step 8: judge whether to need switching working mode, if not being to continue to execute one section of operating mode, make burner,
Blower works according to the combustion parameter under one section of operating mode, then executes burning thermostatic control logic；If so, blower is according to pre-
If igniting wind speed operation, then execute step 9；
Step 9: calculating currently practical combustion power, judge whether currently practical combustion power is less than Working mould after switching
Combustion power needed for formula executes burning thermostatic control logic if not being；If so, returning to step seven.
The present invention solves technical solution used by above-mentioned further technical problem are as follows: in above-mentioned method for controlling combustion,
Burning thermostatic control logic includes the following steps:
Step 1 executes one section of operating mode, and burner, blower is made to work according to the combustion parameter under one section of operating mode,
Then judge whether to need to be switched to three sections of operating modes, if so, open the second electromagnetic proportional valve, make burner, blower according to
Combustion parameter work under three sections of operating modes, then executes step 6；If not being to judge whether to need to be switched to two sections of work
Mode, if not being, return step 1, if so, executing step 2；
Step 2, blower are run according to preset igniting wind speed, open the second electromagnetic proportional valve, make burner, blower according to
Combustion parameter work 300ms~800ms under three sections of operating modes, then executes step 3；
Step 3, the second electromagnetic proportional valve continue to be kept open, and close the first electromagnetic proportional valve, make burner, blower
According to the combustion parameter work under two sections of operating modes, step 4 is then executed；
Step 4 judges whether to need to be switched to three sections of operating modes, if so, opening the first electromagnetic proportional valve, makes to burn
Device, blower work according to the combustion parameter under three sections of operating modes, then execute step 6；If not being to judge whether to need to switch
To one section of operating mode, if not being, return step 3, if so, executing step 5；
Step 5, blower are run according to preset igniting wind speed, open the first electromagnetic proportional valve, make burner, blower according to
Combustion parameter work 300ms~800ms under three sections of operating modes, then returns to step 1；
Step 6 judges whether to need to be switched to one section of operating mode, if so, returning to step 1, if not being, judgement is
It is no to need to be switched to two sections of operating modes, if so, executing step 3, if not being, the second electromagnetic proportional valve is opened, burner, wind are made
Machine works according to the combustion parameter under three sections of operating modes, then executes step 6.
By above-mentioned control logic, so that gas heater is not in flame-out risk when being segmented firepower switching.
The currently practical combustion power=(current set temperature-inflow temperature) current water flow of *；Ignition power
And combustion power needed for three kinds of operating modes is standing parameter.
In the step 7, when the oxygen concentration numerical value of lambda sensor detection deviates preset normal oxygen concentratio numerical value, meter
The difference between oxygen concentration numerical value and preset normal oxygen concentratio numerical value is calculated, between the numerical value that rotation speed of fan improves and above-mentioned difference
It is linear.
Compared with the prior art, the advantages of the present invention are as follows: the size by judging Actual combustion power and firing power,
Then further judge whether the oxygen concentration numerical value of lambda sensor detection deviates preset normal oxygen concentratio numerical value, then to combustion gas
The combustion parameter of water heater carries out dynamic adjustment, to guarantee that burner will not be blown out when wind pressure is excessive；In further side
In case, when one section of operating mode and two sections of operating modes switch, first carry out after three sections of operating mode 300ms~800ms again into
Row switching, the control method can greatly improve the success rate for passing fire.
Detailed description of the invention
Fig. 1 is the gas heater structural schematic diagram for having Chang Minghuo structure in the prior art；
Fig. 2 is the gas heater structural schematic diagram of variable open fire structure in the prior art；
Fig. 3 is gas heater structural schematic diagram in the embodiment of the present invention；
Fig. 4 is the method for controlling combustion flow chart of gas heater in the embodiment of the present invention；
Fig. 5 is the thermostatic control logical flow chart that burns in the embodiment of the present invention.
Specific embodiment
The present invention will be described in further detail below with reference to the embodiments of the drawings.
A kind of method for controlling combustion of gas heater is present embodiments provided, wherein gas heater is primarily directed to
The gas heater of variable open fire structure, the structure of this kind of gas heater are shown in Figure 3 comprising burner, for giving
The igniter of burner ignition enters burning gases are how many in burner the first electromagnetic proportional valve, for controlling
Two electromagnetic proportional valves enter the DC fan that air capacity is how many in combustion chamber for controlling, are arranged on admission line for connecing
Main valve that is logical or closing the burning gases entered in gas heater, for controlling the first electromagnetic proportional valve current value of burning, the
The master board of two electromagnetic proportional valve current values, rotation speed of fan and igniter opening and closing, and the outlet valve being connect with master board, institute
Stating master board tool, there are three types of operating modes: one section of operating mode, two sections of operating modes and three sections of operating modes, and in one section of work
Under operation mode, main valve and the first electromagnetic proportional valve are opened, and the second electromagnetic proportional valve is closed；Under two sections of operating modes, main valve and
Second electromagnetic proportional valve is opened, and the first electromagnetic proportional valve is closed；Under three sections of operating modes, main valve, the first electromagnetic proportional valve and
Second electromagnetic proportional valve is opened.In the present embodiment, install in the exhaust ports of gas heater for acquiring exhaust ports oxygen
The lambda sensor of gas concentration value, lambda sensor are connect with master board, and the master board carries out burning control as follows
System.
The method for controlling combustion of the gas heater includes the following steps, shown in Figure 4:
Step 1: in the standby state, after the outlet valve of gas heater is opened, whether detection flow of inlet water is greater than setting
Threshold value, in the present embodiment, given threshold 2.5L/min, if so, executing step 2, if not being, return step one；
Step 2: blower executes step 3 after running the first setting time according to preset preceding cleaning wind speed；
Step 3: blower is run according to preset igniting wind speed, step 4 is then executed；
Step 4: main valve open, the first electromagnetic proportional valve are opened, the second electromagnetic proportional valve is closed, igniter opens igniting,
Then step 5 is executed；
Step 5: judging whether to light a fire successfully, if it is successful, executing one section of operating mode, make burner, blower according to one
Combustion parameter work under section operating mode, then executes step 6, such as unsuccessful, exports fault-signal；
Step 6: calculating currently practical combustion power, judge whether currently practical combustion power is less than ignition power,
If so, executing step 7, if not being, step 8 is executed；The currently practical combustion power=(current set temperature-water inlet temperature
Degree) the current water flow of *；Ignition power is standing parameter；
Step 7: judge whether the oxygen concentration numerical value of lambda sensor detection deviates preset normal oxygen concentratio numerical value, if so,
Improve rotation speed of fan makes burner, blower according to the combustion under one section of operating mode if not being to continue to execute one section of operating mode
Parameter work is burnt, step 8 is then executed；When the oxygen concentration numerical value of lambda sensor detection deviates preset normal oxygen concentratio numerical value
When, the difference between oxygen concentration numerical value and preset normal oxygen concentratio numerical value is calculated, the numerical value and above-mentioned difference that rotation speed of fan improves
Linear between value, i.e., above-mentioned difference is bigger, and rotation speed of fan improves more；In addition, while adjusting rotation speed of fan,
The electric current of corresponding combusted proportion valve is adaptively adjusted, to obtain the purpose of mating adjusting；
Step 8: judge whether to need switching working mode, if not being to continue to execute one section of operating mode, make burner,
Blower works according to the combustion parameter under one section of operating mode, then executes burning thermostatic control logic；If so, blower is according to pre-
If igniting wind speed operation, then execute step 9；
Step 9: calculating currently practical combustion power, judge whether currently practical combustion power is less than Working mould after switching
Combustion power needed for formula executes burning thermostatic control logic if not being；If so, returning to step seven；It is described currently practical
Combustion power=(current set temperature-inflow temperature) current water flow of *；Combustion power needed for three kinds of operating modes is normal
Setting parameter.
The burning thermostatic control logic includes the following steps, shown in Figure 5:
Step 1 executes one section of operating mode, and burner, blower is made to work according to the combustion parameter under one section of operating mode,
Then judge whether to need to be switched to three sections of operating modes, if so, open the second electromagnetic proportional valve, make burner, blower according to
Combustion parameter work under three sections of operating modes, then executes step 6；If not being to judge whether to need to be switched to two sections of work
Mode, if not being, return step 1, if so, executing step 2；
Step 2, blower are run according to preset igniting wind speed, open the second electromagnetic proportional valve, make burner, blower according to
Combustion parameter work 300ms~800ms under three sections of operating modes, then executes step 3；
Step 3, the second electromagnetic proportional valve continue to be kept open, and close the first electromagnetic proportional valve, make burner, blower
According to the combustion parameter work under two sections of operating modes, step 4 is then executed；
Step 4 judges whether to need to be switched to three sections of operating modes, if so, opening the first electromagnetic proportional valve, makes to burn
Device, blower work according to the combustion parameter under three sections of operating modes, then execute step 6；If not being to judge whether to need to switch
To one section of operating mode, if not being, return step 3, if so, executing step 5；
Step 5, blower are run according to preset igniting wind speed, open the first electromagnetic proportional valve, make burner, blower according to
Combustion parameter work 300ms~800ms under three sections of operating modes, then returns to step 1；
Step 6 judges whether to need to be switched to one section of operating mode, if so, returning to step 1, if not being, judgement is
It is no to need to be switched to two sections of operating modes, if so, executing step 3, if not being, the second electromagnetic proportional valve is opened, burner, wind are made
Machine works according to the combustion parameter under three sections of operating modes, then executes step 6.
Claims (3)
1. a kind of method for controlling combustion of the gas heater based on lambda sensor, the gas heater includes burner, is used
In the igniter for giving burner ignition, enter the first solenoid-operated proportional that burning gases are how many in burner for controlling
Valve, the second electromagnetic proportional valve enter the DC fan that air capacity is how many in combustion chamber for controlling, and setting is used on admission line
In the main valve for being switched on or off the burning gases entered in gas heater, for controlling the first electromagnetic proportional valve electric current of burning
The master board of value, the second electromagnetic proportional valve current value, rotation speed of fan and igniter opening and closing, and the water outlet being connect with master board
Valve, there are three types of operating modes: one section of operating mode, two sections of operating modes and three sections of operating modes for the master board tool, and three kinds
Corresponding combustion parameter being corresponding under operating mode, and under one section of operating mode, main valve and the first electromagnetic proportional valve are opened,
Second electromagnetic proportional valve is closed；Under two sections of operating modes, main valve and the second electromagnetic proportional valve are opened, and the first electromagnetic proportional valve closes
It closes；Under three sections of operating modes, main valve, the first electromagnetic proportional valve and the second electromagnetic proportional valve are opened, it is characterised in that: are being fired
The exhaust ports of gas water heater install the lambda sensor for acquiring exhaust ports oxygen density value, lambda sensor and master board
Connection, the master board carry out Combustion System as follows:
Step 1: in the standby state, after the outlet valve of gas heater is opened, whether detection flow of inlet water is greater than setting threshold
Value, if so, executing step 2, if not being, return step one；
Step 2: blower executes step 3 after running the first setting time according to preset preceding cleaning wind speed；
Step 3: blower is run according to preset igniting wind speed, step 4 is then executed；
Step 4: main valve open, the first electromagnetic proportional valve are opened, the second electromagnetic proportional valve is closed, igniter opens igniting, then
Execute step 5；
Step 5: judging whether to light a fire successfully, if it is successful, executing one section of operating mode, make burner, blower according to one section of work
Combustion parameter work under operation mode, then executes step 6, such as unsuccessful, exports fault-signal；
Step 6: calculating currently practical combustion power, judge whether currently practical combustion power is less than ignition power, such as
It is to execute step 7, if not being, executes step 8；
Step 7: judging whether the oxygen concentration numerical value of lambda sensor detection deviates preset normal oxygen concentratio numerical value, if so, improving
Rotation speed of fan joins burner, blower according to the burning under one section of operating mode if not being to continue to execute one section of operating mode
Number work, then executes step 8；
Step 8: judging whether to need switching working mode, if not being to continue to execute one section of operating mode, make burner, blower
According to the combustion parameter work under one section of operating mode, burning thermostatic control logic is then executed；If so, blower is according to preset
Wind speed of lighting a fire is run, and then executes step 9；
Step 9: calculating currently practical combustion power, judge whether currently practical combustion power is less than operating mode institute after switching
The combustion power needed executes burning thermostatic control logic if not being；If so, returning to step seven；
The burning thermostatic control logic includes the following steps:
Step 1 executes one section of operating mode, so that burner, blower is worked according to the combustion parameter under one section of operating mode, then
Judge whether to need to be switched to three sections of operating modes, if so, opening the second electromagnetic proportional valve, makes burner, blower according to three sections
Combustion parameter work under operating mode, then executes step 6；If not being to judge whether to need to be switched to two sections of operating modes,
If not being, return step 1, if so, executing step 2；
Step 2, blower are run according to preset igniting wind speed, are opened the second electromagnetic proportional valve, are made burner, blower according to three sections
Combustion parameter work 300ms~800ms under operating mode, then executes step 3；
Step 3, the second electromagnetic proportional valve continue to be kept open, close the first electromagnetic proportional valve, make burner, blower according to
Combustion parameter work under two sections of operating modes, then executes step 4；
Step 4 judges whether to need to be switched to three sections of operating modes, if so, the first electromagnetic proportional valve of opening, makes burner, wind
Machine works according to the combustion parameter under three sections of operating modes, then executes step 6；If not being to judge whether to need to be switched to one
Section operating mode, if not being, return step 3, if so, executing step 5；
Step 5, blower are run according to preset igniting wind speed, are opened the first electromagnetic proportional valve, are made burner, blower according to three sections
Combustion parameter work 300ms~800ms under operating mode, then returns to step 1；
Step 6 judges whether to need to be switched to one section of operating mode, if so, 1 is returned to step, if not being to judge whether to need
Be switched to two sections of operating modes, if so, execute step 3, if not being, opening the second electromagnetic proportional valve, make burner, blower by
According to the combustion parameter work under three sections of operating modes, step 6 is then executed.
2. method for controlling combustion according to claim 1, it is characterised in that: the currently practical combustion power=(current
Set temperature-inflow temperature) the current water flow of *；Combustion power needed for ignition power and three kinds of operating modes is normal
Setting parameter.
3. method for controlling combustion according to claim 1, it is characterised in that: in the step 7, when lambda sensor detects
Oxygen concentration numerical value when deviateing preset normal oxygen concentratio numerical value, calculate oxygen concentration numerical value and preset normal oxygen concentratio numerical value it
Between difference, rotation speed of fan improve numerical value and above-mentioned difference between it is linear.
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| CN201710059606.6A CN107339808B (en) | 2017-01-24 | 2017-01-24 | A kind of method for controlling combustion of the gas heater based on lambda sensor |
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| CN201710059606.6A CN107339808B (en) | 2017-01-24 | 2017-01-24 | A kind of method for controlling combustion of the gas heater based on lambda sensor |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109579280A (en) * | 2018-12-28 | 2019-04-05 | 广东顺德大派电气有限公司 | A kind of adaptive gas heater |
| CN110108040A (en) * | 2019-04-04 | 2019-08-09 | 芜湖美的厨卫电器制造有限公司 | The control method and gas heater of gas heater |
| CN110454983B (en) * | 2019-07-26 | 2022-01-07 | 华帝股份有限公司 | Control method for oxygen-poor flameout protection time of gas water heater and gas water heater |
| CN110398071B (en) * | 2019-08-06 | 2021-09-14 | 广东万家乐燃气具有限公司 | Air pressure compensation control method and gas water heater |
| CN110584501B (en) * | 2019-09-16 | 2021-11-12 | 宁波方太厨具有限公司 | Cooking control method of electric oven |
| CN111594869A (en) * | 2020-06-15 | 2020-08-28 | 珠海格力电器股份有限公司 | Gas water heater control method, device and system and gas water heater |
| CN112833555B (en) * | 2020-06-15 | 2022-08-16 | 青岛经济技术开发区海尔热水器有限公司 | Gas water heater and control method thereof |
| CN112859630B (en) * | 2021-01-20 | 2022-06-24 | 宁波方太厨具有限公司 | Intelligent cooking method based on oxygen content |
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| JP6101180B2 (en) * | 2013-09-19 | 2017-03-22 | リンナイ株式会社 | Water heater |
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| CN103900103A (en) * | 2014-04-16 | 2014-07-02 | 上海禾森机电有限公司 | Blowing-type burner control method |
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