CN107339810A - A kind of method for controlling combustion of the gas heater based on DC fan - Google Patents
A kind of method for controlling combustion of the gas heater based on DC fan Download PDFInfo
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- CN107339810A CN107339810A CN201710059637.1A CN201710059637A CN107339810A CN 107339810 A CN107339810 A CN 107339810A CN 201710059637 A CN201710059637 A CN 201710059637A CN 107339810 A CN107339810 A CN 107339810A
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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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N5/00—Systems for controlling combustion
- F23N5/02—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium
- F23N5/025—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium using electrical or electromechanical means
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Regulation And Control Of Combustion (AREA)
Abstract
The present invention relates to a kind of method for controlling combustion of the gas heater based on DC fan, the electromagnetic proportional valve of gas heater first, second electromagnetic proportional valve, DC fan, igniter, burner, main valve and outlet valve, and master board, master board has three kinds of mode of operations, corresponding combustion parameter is corresponding with every kind of mode of operation, and under one section of mode of operation, first electromagnetic proportional valve is opened, under two sections of mode of operations, second electromagnetic proportional valve is opened, under three sections of mode of operations, first electromagnetic proportional valve and the second electromagnetic proportional valve are opened.Size of the invention by judging Actual combustion power and firing power, the rotating speed of DC fan is adjusted to default Wind-Pressure Resistance rotating speed, and maintain 2~5 seconds, then determine whether the current value of DC fan reduces, then Mobile state adjustment is entered to the combustion parameter of gas heater, so as to ensure that burner will not be blown out when blast is excessive.
Description
Technical field
The present invention relates to a kind of method for controlling combustion of the gas heater based on DC fan.
Background technology
Domestic gas-fired water heater will face many uncontrollable factors during use, fluctuation such as flow of inlet water,
Blast caused by the purity of burning gases, the scope of the air pressure of burning gases, the external world blow is excessive etc., and these factors may shadow
Ring the temperature persistance of gas heater or cause gas heater can not normal work.Wherein blast it is excessive caused by machine 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,
When after wind-force reaches some strength water heater will occur ignition point not or be burning when blown out suddenly the problems such as, this
A little problems cause the accommodative ability of environment of domestic gas-fired water heater to decline.For blast it is excessive the problem of this paper presents one kind is anti-
Blast technology can realize that the machine of the AC DC blower fan system when blast is excessive can also burn without being blown out.
In addition, domestic gas-fired water heater forms Smaller load area according to being mutually combined for difference magnetic valve during water heater working
With big loading zone, remain that a region is burnt all the time after water heater working, our this spline structure is referred to as to have Chang Ming
Fiery structure and variable naked light structure.Have that the gas heater structure of Chang Minghuo structures is shown in Figure 1, and this gas heater is deposited
In 2 kinds of mode of operations：When magnetic valve SV1 is individually opened, gas water heater working is in 1 stage mode, when magnetic valve SV1 and electromagnetism
Valve SV2 is opened simultaneously when, gas water heater working is in 2 stage modes.Because region is burnt all the time corresponding to magnetic valve SV1
(being 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 naked light structure is shown in Figure 2, and this kind of gas heater has 3 Working moulds
Formula：Magnetic valve SV1 is individually opened and is operated in 1 stage mode, and magnetic valve SV2 is individually opened and is operated in 2 stage modes, as magnetic valve SV1
3 stage modes are operated in when being opened with magnetic valve SV2 simultaneously, above-mentioned 3 kinds of mode of operations, which are not present, has a certain section all the time in burning feelings
Condition, i.e., variable naked light, flame-out risk just now occurs when 1 stage mode and 2 stage modes mutually switch.
The content of the invention
Primary technical problem to be solved by this invention is to provide one kind for above-mentioned prior art to fire when blast is excessive
The method for controlling combustion for the gas heater that burner will not be blown out.
Further technical problems to be solved of the invention are to provide one kind burner when blast is excessive and will not be blown out, divided
Duan Huoli is not in the method for controlling combustion of the gas heater of flame-out risk when switching.
Technical scheme is used by the present invention solves above-mentioned technical problem：A kind of gas heater based on DC fan
Method for controlling combustion, the gas heater includes burner, for the igniter to burner ignition, enters for controlling
The first how many electromagnetic proportional valve of burning gases, the second electromagnetic proportional valve in burner, enter combustion chamber for controlling
The how many DC fan of interior air capacity, it is arranged on and is used to be switched on or off the combustion gas entered in gas heater on admission line
The main valve of body, for controlling the first electromagnetic proportional valve current value of burning, the second electromagnetic proportional valve current value, rotation speed of fan and igniting
The master board of device opening and closing, and the outlet valve being connected with master board, the master board have three kinds of mode of operations：One section of work
Operation mode, two sections of mode of operations and three sections of mode of operations, under one section of mode of operation, main valve and the first electromagnetic proportional valve are opened,
Second electromagnetic proportional valve is closed；Under two sections of mode of operations, main valve and the second electromagnetic proportional valve are opened, and the first electromagnetic proportional valve closes
Close；Under three sections of mode of operations, main valve, the first electromagnetic proportional valve and the second electromagnetic proportional valve are opened, it is characterised in that：It is described
Master board carries out Combustion System as follows：
Step 1: in the standby state, after the outlet valve opening of gas heater, whether detection flow of inlet water is more than setting
Threshold value, in this way, perform step 2, if not being, return to step one；
Step 2: DC fan performs step 3 after running the first setting time according to default preceding cleaning wind speed；
Step 3: DC fan is run according to default igniting wind speed, step 4 is then performed；
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 performed；
Step 5: judge whether to light a fire successfully, if it is successful, perform one section of mode of operation, make burner, DC fan by
Worked according to the combustion parameter under one section of mode of operation, then perform step 6, it is such as unsuccessful, export fault-signal；
Step 6: calculating currently practical combustion power, judge whether currently practical combustion power is less than ignition power,
In this way, step 7 is performed, if not being, performs step 8；
Step 7: the rotating speed of DC fan is adjusted into default Wind-Pressure Resistance rotating speed, and maintain 2~5 seconds, then judge direct current
Whether the current value of blower fan reduces, and in this way, improves DC fan rotating speed, and accordingly improve the first electromagnetic proportional valve electric current；If not
It is to continue executing with one section of mode of operation, burner, DC fan is worked according to the combustion parameter under one section of mode of operation, so
After perform step 8；
Step 8: judge whether to need switching working mode, if not being to continue executing with one section of mode of operation, make burner,
DC fan works according to the combustion parameter under one section of mode of operation, then performs burning thermostatic control logic；In this way, direct current wind
Machine is run according to default fire speed, then performs 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, if not being, perform burning thermostatic control logic；In this way, return and perform step 7.
Technical scheme is used by the present invention solves above-mentioned further technical problem：In above-mentioned method for controlling combustion,
Burning thermostatic control logic comprises the following steps：
Step 1, one section of mode of operation is performed, make burner, DC fan according to the combustion parameter under one section of mode of operation
Work, then judges whether to need to be switched to three sections of mode of operations, in this way, opens the second electromagnetic proportional valve, makes burner, direct current
Blower fan works according to the combustion parameter under three sections of mode of operations, then performs step 6；If not being to judge whether that needs are switched to
Two sections of mode of operations, if not being, return to step 1, in this way, perform step 2；
Step 2, DC fan open the second electromagnetic proportional valve, make burner, direct current according to default igniting wind speed operation
Then blower fan performs step 3 according to combustion parameter work 300ms~800ms under three sections of mode of operations；
Step 3, the second electromagnetic proportional valve continue to remain on, and close the first electromagnetic proportional valve, make burner, direct current
Blower fan works according to the combustion parameter under two sections of mode of operations, then performs step 4；
Step 4, judge whether to need to be switched to three sections of mode of operations, in this way, open the first electromagnetic proportional valve, make burning
Device, DC fan work according to the combustion parameter under three sections of mode of operations, then perform step 6；If not being to judge whether to need
One section of mode of operation is switched to, if not being, return to step 3, in this way, performs step 5；
Step 5, DC fan open the first electromagnetic proportional valve, make burner, direct current according to default igniting wind speed operation
Blower fan is then back to according to combustion parameter work 300ms~800ms under three sections of mode of operations and performs step 1；
Step 6, judge whether to need to be switched to one section of mode of operation, in this way, return and perform step 1, if not being, judgement is
It is no to need to be switched to two sections of mode of operations, in this way, perform step 3, if not being, open the second electromagnetic proportional valve, make burner, directly
Flow fan works according to the combustion parameter under three sections of mode of operations, then performs step 6.
Pass through 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 design temperature-inflow temperature) current water-carrying capacity of *；Ignition power
And the combustion power needed for three kinds of mode of operations is standing parameter.
After the current value of DC fan reduces, numerical value and the current value of DC fan that DC fan rotating speed improves are reduced
Number it is linear.
Compared with prior art, the advantage of the invention is that：By judging the size of Actual combustion power and firing power,
The rotating speed of DC fan is adjusted to default Wind-Pressure Resistance rotating speed, and maintained 2~5 seconds, then determines whether the electricity of DC fan
Whether flow valuve reduces, and then enters Mobile state adjustment to the combustion parameter of gas heater, so as to ensure to burn when blast is excessive
Device will not be blown out；In further scheme, when one section of mode of operation switches with two sections of mode of operations, three sections of work are first carried out
Switched over again after pattern 300ms~800ms, the control method can greatly improve the success rate for passing fire.
Brief description of the drawings
Fig. 1 is the gas heater structural representation for having in the prior art Chang Minghuo structures；
Fig. 2 is the gas heater structural representation of variable naked light structure in the prior art；
Fig. 3 is gas heater structural representation 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 burnt in the embodiment of the present invention.
Embodiment
The present invention is described in further detail below in conjunction with accompanying drawing embodiment.
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 naked light structure, the structure of this kind of gas heater is shown in Figure 3, and it includes burner, for
The igniter of burner ignition, enter 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, be arranged on admission line and be used to connect
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 connected with master board；Institute
Stating master board has three kinds of mode of operations：One section of mode of operation, two sections of mode of operations and three sections of mode of operations, 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 mode of operations, main valve and
Second electromagnetic proportional valve is opened, and the first electromagnetic proportional valve is closed；Under three sections of mode of operations, main valve, the first electromagnetic proportional valve and
Second electromagnetic proportional valve is opened.In the present embodiment, the master board carries out Combustion System as follows.
The method for controlling combustion of the gas heater comprises the following steps, shown in Figure 4：
Step 1: in the standby state, after the outlet valve opening of gas heater, whether detection flow of inlet water is more than setting
Threshold value, in the present embodiment, given threshold 2.5L/min, in this way, perform step 2, if not being, return to step one；
Step 2: DC fan performs step 3 after running the first setting time according to default preceding cleaning wind speed；
Step 3: DC fan is run according to default igniting wind speed, step 4 is then performed；
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 performed；
Step 5: judge whether to light a fire successfully, if it is successful, perform one section of mode of operation, make burner, DC fan by
Worked according to the combustion parameter under one section of mode of operation, then perform step 6, it is such as unsuccessful, export fault-signal；
Step 6: calculating currently practical combustion power, judge whether currently practical combustion power is less than ignition power,
In this way, step 7 is performed, if not being, performs step 8；The currently practical combustion power=(current design temperature-enter water temperature
Degree) the current water-carrying capacity of *；Ignition power is standing parameter；
Step 7: the rotating speed of DC fan is adjusted into default Wind-Pressure Resistance rotating speed, and maintain 2~5 seconds, then judge direct current
Whether the current value of blower fan reduces, and in this way, improves DC fan rotating speed, and accordingly improve the first electromagnetic proportional valve electric current；If not
It is to continue executing with one section of mode of operation, burner, DC fan is worked according to the combustion parameter under one section of mode of operation, so
After perform step 8；After the current value of DC fan reduces, numerical value and the electric current of DC fan that DC fan rotating speed improves
Value reduce number it is linear, i.e., DC fan current value reduce it is more, DC fan rotating speed improve it is more；Separately
Outside, while DC fan rotating speed is adjusted, the electric current of the corresponding combusted proportion valve of accommodation, to obtain the mesh of supporting regulation
's；
Step 8: judge whether to need switching working mode, if not being to continue executing with one section of mode of operation, make burner,
DC fan works according to the combustion parameter under one section of mode of operation, then performs burning thermostatic control logic；In this way, direct current wind
Then machine performs step 9 according to default igniting wind speed operation；
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, if not being, perform burning thermostatic control logic；In this way, return and perform step 7；It is described currently practical
Combustion power=(current design temperature-inflow temperature) current water-carrying capacity of *；Combustion power needed for three kinds of mode of operations is normal
Setting parameter.
The burning thermostatic control logic comprises the following steps, shown in Figure 5：
Step 1, one section of mode of operation is performed, make burner, DC fan according to the combustion parameter under one section of mode of operation
Work, then judges whether to need to be switched to three sections of mode of operations, in this way, opens the second electromagnetic proportional valve, makes burner, direct current
Blower fan works according to the combustion parameter under three sections of mode of operations, then performs step 6；If not being to judge whether that needs are switched to
Two sections of mode of operations, if not being, return to step 1, in this way, perform step 2；
Step 2, DC fan open the second electromagnetic proportional valve, make burner, direct current according to default igniting wind speed operation
Then blower fan performs step 3 according to combustion parameter work 300ms~800ms under three sections of mode of operations；
Step 3, the second electromagnetic proportional valve continue to remain on, and close the first electromagnetic proportional valve, make burner, direct current
Blower fan works according to the combustion parameter under two sections of mode of operations, then performs step 4；
Step 4, judge whether to need to be switched to three sections of mode of operations, in this way, open the first electromagnetic proportional valve, make burning
Device, DC fan work according to the combustion parameter under three sections of mode of operations, then perform step 6；If not being to judge whether to need
One section of mode of operation is switched to, if not being, return to step 3, in this way, performs step 5；
Step 5, DC fan open the first electromagnetic proportional valve, make burner, direct current according to default igniting wind speed operation
Blower fan is then back to according to combustion parameter work 300ms~800ms under three sections of mode of operations and performs step 1；
Step 6, judge whether to need to be switched to one section of mode of operation, in this way, return and perform step 1, if not being, judgement is
It is no to need to be switched to two sections of mode of operations, in this way, perform step 3, if not being, open the second electromagnetic proportional valve, make burner, directly
Flow fan works according to the combustion parameter under three sections of mode of operations, then performs step 6.
Claims (4)
1. a kind of method for controlling combustion of the gas heater based on DC fan, the gas heater includes burner, uses
In the igniter to 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, be arranged on admission line and use
In the main valve for the burning gases for being switched on or off entering in gas heater, for controlling the first electromagnetic proportional valve electric current that burns
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 connected with master board
Valve, the master board have three kinds of mode of operations：One section of mode of operation, two sections of mode of operations and three sections of mode of operations, one
Under section mode of operation, main valve and the first electromagnetic proportional valve are opened, and the second electromagnetic proportional valve is closed；It is main under two sections of mode of operations
Valve and the second electromagnetic proportional valve are opened, and the first electromagnetic proportional valve is closed；Under three sections of mode of operations, main valve, the first solenoid-operated proportional
Valve and the second electromagnetic proportional valve are opened, it is characterised in that：The master board carries out Combustion System as follows：
Step 1: in the standby state, after the outlet valve opening of gas heater, whether detection flow of inlet water is more than setting threshold
Value, in this way, perform step 2, if not being, return to step one；
Step 2: DC fan performs step 3 after running the first setting time according to default preceding cleaning wind speed；
Step 3: DC fan is run according to default igniting wind speed, step 4 is then performed；
Step 4: main valve open, the first electromagnetic proportional valve are opened, the second electromagnetic proportional valve is closed, igniter opens igniting, then
Perform step 5；
Step 5: judging whether to light a fire successfully, if it is successful, performing one section of mode of operation, make burner, DC fan according to one
Combustion parameter work under section mode of operation, then performs 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 perform step 7, if not being, performs step 8；
Step 7: the rotating speed of DC fan is adjusted into default Wind-Pressure Resistance rotating speed, and maintain 2~5 seconds, then judge DC fan
Current value whether reduce, in this way, improve DC fan rotating speed, and accordingly improve the first electromagnetic proportional valve electric current；If not being, after
It is continuous to perform one section of mode of operation, burner, DC fan is worked according to the combustion parameter under one section of mode of operation, then perform
Step 8；
Step 8: judging whether to need switching working mode, if not being to continue executing with one section of mode of operation, make burner, direct current
Blower fan works according to the combustion parameter under one section of mode of operation, then performs burning thermostatic control logic；In this way, DC fan is pressed
Run according to default fire speed, then perform step 9；
Step 9: calculating currently practical combustion power, judge whether currently practical combustion power is less than mode of operation institute after switching
The combustion power needed, if not being, perform burning thermostatic control logic；In this way, return and perform step 7.
2. method for controlling combustion according to claim 1, it is characterised in that：The burning thermostatic control logic includes as follows
Step：
Step 1, one section of mode of operation is performed, burner, DC fan is worked according to the combustion parameter under one section of mode of operation,
Then judge whether to need to be switched to three sections of mode of operations, in this way, open the second electromagnetic proportional valve, make burner, DC fan
Worked according to the combustion parameter under three sections of mode of operations, then perform step 6；If not being to judge whether to need to be switched to two sections
Mode of operation, if not being, return to step 1, in this way, perform step 2；
Step 2, DC fan are run according to default fire speed, are opened the second electromagnetic proportional valve, are made burner, DC fan
According to combustion parameter work 300ms~800ms under three sections of mode of operations, step 3 is then performed；
Step 3, the second electromagnetic proportional valve continue to remain on, and close the first electromagnetic proportional valve, make burner, DC fan
Worked according to the combustion parameter under two sections of mode of operations, then perform step 4；
Step 4, judge whether to need to be switched to three sections of mode of operations, in this way, open the first electromagnetic proportional valve, make burner, straight
Flow fan works according to the combustion parameter under three sections of mode of operations, then performs step 6；If not being to judge whether to need to switch
To one section of mode of operation, if not being, return to step 3, in this way, step 5 is performed；
Step 5, DC fan are run according to default fire speed, are opened the first electromagnetic proportional valve, are made burner, DC fan
According to combustion parameter work 300ms~800ms under three sections of mode of operations, it is then back to and performs step 1；
Step 6, judge whether to need to be switched to one section of mode of operation, in this way, return and perform step 1, if not being to judge whether to need
Two sections of mode of operations are switched to, in this way, perform step 3, if not being, the second electromagnetic proportional valve is opened, makes burner, direct current wind
Machine works according to the combustion parameter under three sections of mode of operations, then performs step 6.
3. method for controlling combustion according to claim 1 or 2, it is characterised in that：The currently practical combustion power=(when
Preceding design temperature-inflow temperature) the current water-carrying capacity of *；Combustion power needed for ignition power and three kinds of mode of operations is
Standing parameter.
4. method for controlling combustion according to claim 1 or 2, it is characterised in that：In the step 7, when DC fan
Current value reduce after, DC fan rotating speed improve numerical value and DC fan current value reduce number it is linear.
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| CN201710059637.1A CN107339810B (en) | 2017-01-24 | 2017-01-24 | A kind of method for controlling combustion of the gas heater based on DC fan |
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| CN109489257A (en) * | 2018-10-31 | 2019-03-19 | 阿诗丹顿燃具有限公司 | A kind of quick start method of zero cold water gas instantaneous water heater |
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| CN110332717A (en) * | 2019-07-19 | 2019-10-15 | 珠海格力电器股份有限公司 | Combustion control method and device for water heater, water heater and storage medium |
| CN111895652A (en) * | 2020-07-06 | 2020-11-06 | 华帝股份有限公司 | Gas water heater and control method thereof |
| CN113586500A (en) * | 2020-04-30 | 2021-11-02 | 芜湖美的厨卫电器制造有限公司 | Fan control method, controller and water heater |
| CN114183770A (en) * | 2020-09-14 | 2022-03-15 | 中国石油天然气股份有限公司 | Boiler air volume control method, system and device |
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| CN109631344B (en) * | 2018-11-14 | 2024-01-02 | 广东万和新电气股份有限公司 | Multi-air-source self-adaptive adjustment method, control system and gas water heater with same |
| CN110332717A (en) * | 2019-07-19 | 2019-10-15 | 珠海格力电器股份有限公司 | Combustion control method and device for water heater, water heater and storage medium |
| CN113586500A (en) * | 2020-04-30 | 2021-11-02 | 芜湖美的厨卫电器制造有限公司 | Fan control method, controller and water heater |
| CN111895652A (en) * | 2020-07-06 | 2020-11-06 | 华帝股份有限公司 | Gas water heater and control method thereof |
| CN114183770A (en) * | 2020-09-14 | 2022-03-15 | 中国石油天然气股份有限公司 | Boiler air volume control method, system and device |
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