CN106225249A - Gas heater and safety control system thereof and method - Google Patents
Gas heater and safety control system thereof and method Download PDFInfo
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- CN106225249A CN106225249A CN201610794742.5A CN201610794742A CN106225249A CN 106225249 A CN106225249 A CN 106225249A CN 201610794742 A CN201610794742 A CN 201610794742A CN 106225249 A CN106225249 A CN 106225249A
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- 238000000034 method Methods 0.000 title claims abstract description 32
- 238000001514 detection method Methods 0.000 claims abstract description 22
- 239000007789 gas Substances 0.000 claims description 157
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 56
- 230000001276 controlling effect Effects 0.000 claims description 23
- 238000002485 combustion reaction Methods 0.000 claims description 21
- 238000012937 correction Methods 0.000 claims description 20
- 238000013461 design Methods 0.000 claims description 15
- 230000001105 regulatory effect Effects 0.000 claims description 7
- 239000002912 waste gas Substances 0.000 claims description 4
- 238000004891 communication Methods 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 3
- 239000000567 combustion gas Substances 0.000 description 12
- 238000005070 sampling Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 206010008190 Cerebrovascular accident Diseases 0.000 description 1
- 208000006011 Stroke Diseases 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
Classifications
-
- 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
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Regulation And Control Of Combustion (AREA)
Abstract
The invention discloses a kind of gas heater and safety control system thereof and method, wherein, system includes: exhaust blower；Rotation speed detection unit, for detecting the rotating speed of exhaust blower；Power obtaining unit, for obtaining the output set-point of exhaust blower；Rotating speed difference acquiring unit, for obtaining rotary speed actual value and the rotating speed reference value of exhaust blower according to output set-point, and calculates difference between the two；Air draft control unit is connected with exhaust blower, rotation speed detection unit, rotating speed difference acquiring unit and power obtaining unit respectively, for the default outlet blast curve of exhaust blower being modified according to difference, and judge the air outlet blast situation of exhaust blower according to the rotating speed of exhaust blower, revised outlet blast curve and output set-point, and regulate the output set-point of exhaust blower according to the air outlet blast situation of exhaust blower.This system is able to ensure that gas heater has good burning condition, it is ensured that its safe and reliable operation, and control accuracy is high.
Description
Technical field
The present invention relates to technical field of water heaters, particularly to a kind of gas heater and safety control system thereof and side
Method.
Background technology
At present, the most common gas heater includes: D type (natural exhaust), Q type (forced exhaust formula), p-type
(naturally giving aerofluxus), G type (being forced to aerofluxus) and W type (formula is set outside room) etc..Wherein, in the gas heater of Q type and G type
Directly equipped with exhaust blower, to force to discharge by waste gas during burning, situation occurs to prevent that residual gas from firing etc..
In correlation technique, Q type gas heater many employings blast detector unit detects the blast in air port, then basis
Exhaust blower and igniting unit are controlled, to ensure that gas heater can normally work by the blast of detection.Employing blast is examined
Although surveying the burning operating of gas heater in the case of unit can avoid blast to pour in down a chimney, but, this installation cost is higher, and
Easily cause gas heater to shut down because of slight blast, cause user normally to use.
Summary of the invention
It is contemplated that one of technical problem solved the most to a certain extent in correlation technique.
To this end, the first of the present invention purpose is to propose the safety control system of a kind of gas heater, this system energy
Enough guarantee that gas heater has good burning condition, it is ensured that gas heater safe and reliable operation, and system response time
Hurry up, it is provided that accurately air quantity, improve control accuracy.
Second object of the present invention is to propose a kind of gas heater.
Third object of the present invention is to propose the method for controlling security of a kind of gas heater.
For achieving the above object, first aspect present invention embodiment proposes the security control system of a kind of gas heater
System, including: exhaust blower, produced waste gas when being used for discharging gas heater burning；Rotation speed detection unit, is used for detecting described
The rotating speed of exhaust blower；Power obtaining unit, for obtaining the output set-point of described exhaust blower；Rotating speed difference obtains single
Unit, for obtaining the rotary speed actual value of described exhaust blower and described exhaust blower according to the output set-point of described exhaust blower
Rotating speed reference value, and calculate the difference between described rotary speed actual value and described rotating speed reference value；And air draft control unit, institute
State air draft control unit respectively with described exhaust blower, described rotation speed detection unit, described rotating speed difference acquiring unit and described merit
Rate acquiring unit is respectively connected with, for the default outlet blast curve of described exhaust blower being modified according to described difference, and
The output set-point of the rotating speed according to described exhaust blower, revised outlet blast curve and described exhaust blower judges described
The air outlet blast situation of exhaust blower, and the output work of described exhaust blower is regulated according to the air outlet blast situation of described exhaust blower
Rate set-point, wherein, described default outlet blast curve is the pass between described output set-point and multiple preset rotation speed
It it is curve.
The safety control system of gas heater according to embodiments of the present invention, first passes through power obtaining unit and obtains row
The output set-point of blower fan, and obtain air draft by rotating speed difference acquiring unit according to the output set-point of exhaust blower
The rotary speed actual value of machine and rotating speed reference value, be calculated the difference between rotary speed actual value and rotating speed reference value, then, air draft
Control unit is according to the default outlet blast curve of the difference correction exhaust blower between rotary speed actual value and rotating speed reference value, and root
The air outlet of exhaust blower is judged according to the output set-point of the rotating speed of exhaust blower, revised outlet blast curve and exhaust blower
Blast situation, and the output set-point of exhaust blower is regulated according to the air outlet blast situation of exhaust blower, thus realize row
The regulation of the air quantity of blower fan, it is ensured that gas heater is in operation process, and the combustion gas introduced can reach after mixing with air
Good burning condition, it is ensured that the safe and reliable operation of gas heater.Meanwhile, direct output set-point to exhaust blower
It is adjusted as active control, compared to the passive control that the rotating speed of exhaust blower is carried out, not only fast response time, and also permissible
Accurate air quantity is provided, improves control accuracy.
It addition, the safety control system of gas heater according to the above embodiment of the present invention can also have following additional
Technical characteristic:
According to one embodiment of present invention, described exhaust blower is preset by described air draft control unit according to described difference
When outlet blast curve is modified, revised outlet blast curve is that described output set-point is preset with the plurality of
Relation curve between rotating speed and described difference sum.
According to one embodiment of present invention, described air draft control unit is according to the rotating speed of described exhaust blower, revised
Outlet blast curve and the output set-point of described exhaust blower judge the air outlet blast situation of described exhaust blower, and according to
When the air outlet blast situation of described exhaust blower regulates the output set-point of described exhaust blower, wherein, if described air draft
Control unit judges that the air outlet blast situation of described exhaust blower is low blast situation, then control the output of described exhaust blower
Set-point reduces by the first preset value；If the air outlet blast situation that described air draft control unit judges described exhaust blower is apoplexy
Pressure situation, then the output set-point controlling described exhaust blower keeps constant；If described air draft control unit judges described
The air outlet blast situation of exhaust blower is high blast situation, then controlling the output set-point of described exhaust blower, to increase by second pre-
If value.
According to one embodiment of present invention, the safety control system of above-mentioned gas heater, also include system control
Unit, described system control unit is in communication with each other with described air draft control unit, wherein, if described air draft control unit
Judge the air outlet blast situation of described exhaust blower as the highest blast situation, or the rotating speed of described exhaust blower is more than rotating speed threshold
Value, described air draft control unit then sends stopping signal to described system control unit so that described system control unit according to
Described stopping signal controls described gas heater and shuts down.
According to one embodiment of present invention, the safety control system of above-mentioned gas heater, also include: feedwater is single
Unit, described is connected with described system control unit to water unit；Temperature acquiring unit, described temperature acquiring unit and described system
Control unit is connected, for obtaining water outlet design temperature and the cold water temperature of described gas heater of described gas heater,
Wherein, described system control unit according to described to the confluent of water unit, described water outlet design temperature and described cold water temperature
Calculate total amount of heat needed for described gas heater, and according to total amount of heat needed for described gas heater obtain electric current control instruction and
The initial output power set-point of described exhaust blower.
According to one embodiment of present invention, the safety control system of above-mentioned gas heater, also include combustion unit,
Described combustion unit is connected with described system control unit, and described combustion unit has proportioning valve, and wherein, described system controls single
Unit according to described electric current control instruction by control described proportioning valve so that described combustion unit is controlled.
According to one embodiment of present invention, described gas heater is forced exhaust formula gas heater.
For achieving the above object, second aspect present invention embodiment proposes a kind of gas heater, and it includes above-mentioned
The safety control system of gas heater.
The gas heater of the embodiment of the present invention, by above-mentioned safety control system, it is possible to according to the rotating speed of exhaust blower
The default outlet blast curve of exhaust blower is modified by the difference between actual value and rotating speed reference value, and according to exhaust blower
The output set-point of rotating speed, revised outlet blast curve and exhaust blower judges the air outlet blast situation of exhaust blower,
And the output set-point of the air outlet blast situation regulation exhaust blower according to exhaust blower, thus realize the air quantity to exhaust blower
Regulation, it is ensured that gas heater is in operation process, and the combustion gas introduced can reach good burning with air after mixing
Condition, it is ensured that the safe and reliable operation of gas heater, and, directly the output set-point to exhaust blower be adjusted into
Actively control, compared to the passive control that the rotating speed of exhaust blower is carried out, not only fast response time, and can provide and relatively be as the criterion
True air quantity, improves control accuracy.
For achieving the above object, third aspect present invention embodiment proposes the security control side of a kind of gas heater
Method, comprises the following steps: obtain the output set-point of described exhaust blower and corresponding rotating speed reference value；According to described air draft
The output set-point of machine obtains the rotary speed actual value of described exhaust blower, and calculates described rotary speed actual value and described rotating speed base
Difference between quasi-value；According to the default outlet blast curve of exhaust blower described in described difference correction, wherein, described default outlet
Blast curve is the relation curve between described output set-point and multiple preset rotation speed；Detect in described gas heater
The rotating speed of exhaust blower；Rotating speed according to described exhaust blower, revised outlet blast curve and the output of described exhaust blower
Set-point judges the air outlet blast situation of described exhaust blower, and regulates described according to the air outlet blast situation of described exhaust blower
The output set-point of exhaust blower.
The method of controlling security of gas heater according to embodiments of the present invention, first obtain the output of exhaust blower to
Definite value and corresponding rotating speed reference value, obtain rotary speed actual value and the rotating speed of exhaust blower according to the output set-point of exhaust blower
Reference value, and calculate the difference between rotary speed actual value and rotating speed reference value, and pre-according to described difference correction exhaust blower
Set out one's intention as revealed in what one says to buckle line, it is then detected that the rotating speed of exhaust blower, according to the rotating speed of exhaust blower, revised outlet blast curve and
The output set-point of exhaust blower judges the air outlet blast situation of exhaust blower, and according to the air outlet blast situation of exhaust blower
The output set-point of regulation exhaust blower, thus realize the regulation of the air quantity to exhaust blower, it is ensured that gas heater is in operating
During, the combustion gas introduced can reach good burning condition with air after mixing, it is ensured that the safety of gas heater can
By running.Meanwhile, directly the output set-point to exhaust blower is adjusted into active control, turning compared to exhaust blower
The passive control that speed is carried out, not only fast response time, and accurate air quantity can be provided, improve control accuracy.
It addition, the method for controlling security of gas heater according to the above embodiment of the present invention can also have following additional
Technical characteristic:
According to one embodiment of present invention, the described default outlet blast according to exhaust blower described in described difference correction is bent
During line, revised outlet blast curve is described output set-point and the plurality of preset rotation speed and described difference sum
Between relation curve.
According to one embodiment of present invention, the described rotating speed according to described exhaust blower, revised outlet blast curve
With the air outlet blast situation that the output set-point of described exhaust blower judges described exhaust blower, and according to described exhaust blower
Air outlet blast situation regulates the output set-point of described exhaust blower, including: if it is determined that the air outlet of described exhaust blower
Blast situation is low blast situation, then the output set-point controlling described exhaust blower reduces by the first preset value；If it is determined that
The air outlet blast situation of described exhaust blower is middle blast situation, then the output set-point controlling described exhaust blower keeps not
Become；If it is determined that the air outlet blast situation of described exhaust blower is high blast situation, then control the output of described exhaust blower
Set-point increases by the second preset value.
According to one embodiment of present invention, the described rotating speed according to described exhaust blower, revised outlet blast curve
With the air outlet blast situation that the output set-point of described exhaust blower judges described exhaust blower, and according to described exhaust blower
Air outlet blast situation regulates the output set-point of described exhaust blower, also includes: if it is determined that the air-out of described exhaust blower
One's intention as revealed in what one says pressure situation is the highest blast situation, or the rotating speed of described exhaust blower is more than rotary speed threshold value, then control described gas and hot water
Device is shut down.
According to one embodiment of present invention, the method for controlling security of above-mentioned gas heater, also include: obtain described
The confluent of gas heater, and obtain the water outlet design temperature of described gas heater, and obtain described gas heater
Cold water temperature；Described gas heater institute is calculated according to described confluent, described water outlet design temperature and described cold water temperature
Need total amount of heat, and obtain the initial output of electric current control instruction and described exhaust blower according to total amount of heat needed for described gas heater
Power set-point；According to described electric current control instruction by the proportioning valve of combustion unit in the described gas heater of control to carry out
Combustion System.
Accompanying drawing explanation
Fig. 1 is the block diagram of the safety control system of gas heater according to an embodiment of the invention；
Fig. 2 is the output set-point relation with the rotating speed of exhaust blower of exhaust blower according to an embodiment of the invention
Curve chart；
Fig. 3 is the block diagram of the safety control system of gas heater in accordance with another embodiment of the present invention；
Fig. 4 is controlled quentity controlled variable and the air draft of total amount of heat and proportioning valve needed for gas heater according to an embodiment of the invention
The graph of relation of the output set-point of machine；
Fig. 5 is that the output set-point of exhaust blower according to an embodiment of the invention is actual with the rotating speed of exhaust blower
Value, the graph of relation of rotating speed reference value of exhaust blower；
Fig. 6 is the flow chart of the method for controlling security of gas heater according to embodiments of the present invention.
Detailed description of the invention
Embodiments of the invention are described below in detail, and the example of described embodiment is shown in the drawings, the most from start to finish
Same or similar label represents same or similar element or has the element of same or like function.Below with reference to attached
The embodiment that figure describes is exemplary, it is intended to is used for explaining the present invention, and is not considered as limiting the invention.
Describe with reference to the accompanying drawings the gas heater proposed according to embodiments of the present invention and safety control system thereof and
Method.
Fig. 1 is the block diagram of the safety control system of gas heater according to an embodiment of the invention.As it is shown in figure 1,
The safety control system of this gas heater includes: exhaust blower 10, rotation speed detection unit 20, power obtaining unit 30, speed discrepancy
Value acquiring unit 40 and air draft control unit 50.
Wherein, produced waste gas when exhaust blower 10 is used for discharging gas heater burning.Rotation speed detection unit 20 is used for
The rotating speed of detection exhaust blower.Power obtaining unit 30 is for obtaining the output set-point of exhaust blower.Rotating speed difference obtains single
Unit 40 obtains rotary speed actual value and the rotating speed reference value of exhaust blower of exhaust blower for the output set-point according to exhaust blower,
And calculate the difference between rotary speed actual value and rotating speed reference value.Air draft control unit 50 and exhaust blower 10, rotation speed detection unit
20, power obtaining unit 30 and rotating speed difference acquiring unit 40 are respectively connected with, for according to the rotary speed actual value of exhaust blower 10 with
The default outlet blast curve of the difference correction exhaust blower 10 between rotating speed reference value, and according to the rotating speed of exhaust blower 10, correction
After outlet blast curve and the output set-point of exhaust blower 10 judge the air outlet blast situation of exhaust blower 10, and according to
The output set-point of the air outlet blast situation regulation exhaust blower 10 of exhaust blower, wherein, it is defeated for presetting outlet blast curve
Go out the relation curve between power set-point and multiple preset rotation speed.
Specifically, in gas heater first work process, first pass through power obtaining unit 30 and obtain exhaust blower
The power output set-point of 10, under base condition, runs sampling contrast program, i.e. by rotating speed difference acquiring unit 40 basis
The power output set-point of exhaust blower 10 obtains corresponding rotary speed actual value, and calculates between rotary speed actual value and rotating speed reference value
Difference, and pre-according to the difference correction exhaust blower 10 between rotary speed actual value and rotating speed reference value of air draft control unit 50
Setting out one's intention as revealed in what one says to buckle line, this presets outlet blast curve is output set-point with multiple preset rotation speed (as 3 are preset and turn
Speed) between relation curve.And then detect the rotating speed of exhaust blower 10 in real time by rotation speed detection unit 20, and combine exhaust blower 10
Revised outlet blast curve and the present output power set-point of exhaust blower 10 judge the air outlet blast of exhaust blower 10
Situation, is then adjusted the output set-point of exhaust blower 10 according to air outlet blast situation, thus realizes air draft
The regulation of the air quantity of machine 10, it is ensured that gas heater is in operation process, and the combustion gas introduced can reach after mixing with air
Good burning condition, it is ensured that the safety and reliability of gas heater.Meanwhile, directly the output of exhaust blower is given
Value is adjusted as active control, compared to the passive control carrying out the rotating speed of exhaust blower, not only fast response time, Er Qieke
To provide accurate air quantity, improve control accuracy, and the cost ratio of whole system is relatively low.
It is appreciated that the power of the above-mentioned exhaust blower 10 for calculating difference between rotary speed actual value and rotating speed reference value is defeated
Go out set-point and can not be identical value with pressing the output set-point of situation for determining one's intention as revealed in what one says, be used for determining one's intention as revealed in what one says
The output set-point of pressure situation and the output set-point for regulating are identical value.
In one embodiment of the invention, air draft control unit 50 is according between rotary speed actual value and rotating speed reference value
During the default outlet blast curve of difference correction exhaust blower 10, revised outlet blast curve is that output set-point is with many
Relation curve between individual preset rotation speed and above-mentioned difference sum.
Further, air draft control unit 50 is according to the rotating speed of exhaust blower 10, revised outlet blast curve and air draft
The output set-point of machine 10 judges the air outlet blast situation of exhaust blower 10, and according to the air outlet blast feelings of exhaust blower 10
When condition regulates the output set-point of exhaust blower 10, wherein, if air draft control unit 50 judges the air outlet of exhaust blower 10
Blast situation is low blast situation, then the output set-point controlling exhaust blower 10 reduces by the first preset value；If air draft control
Unit 50 processed judges that the air outlet blast situation of exhaust blower 10 is middle blast situation, then the output controlling exhaust blower 10 gives
Value keeps constant；If the air outlet blast situation that air draft control unit 40 judges exhaust blower 10 is high blast situation, then control
The output set-point of exhaust blower 10 increases by the second preset value.Wherein, the first preset value and the second preset value can be according to realities
Border situation is demarcated, and the first preset value and the second preset value can be fixed value, it is also possible to dynamically adjust according to practical situation.
Specifically, as in figure 2 it is shown, under a certain output set-point of exhaust blower 10, if the rotating speed R of exhaust blower 10
Be positioned at the lower section (region I) of the first curve R1+dn, then the blast of the air outlet of explanation exhaust blower 10 is smaller, now air draft control
Unit 50 processed controls the output set-point of exhaust blower 10 and reduces by the first preset value, i.e. output set-point P=P-△ P1,
To reduce the output of exhaust blower 10；If the rotating speed R of exhaust blower 10 is positioned at the top of the first curve R1+dn and is positioned at second
The lower section (region II) of curve R2+dn, then the blast of the air outlet of explanation exhaust blower 10 is appropriate with the rotating ratio of exhaust blower 10,
When blast increases, due to the physical characteristic of exhaust blower, exhaust blower 10 can improve rotating speed, therefore without to exhaust blower 10 by nature
Output set-point is adjusted；If the rotating speed R of exhaust blower 10 is positioned at the top of the second curve R2+dn and is positioned at the 3rd song
The lower section (region III) of line R3+dn, then the wind pressure ratio of the air outlet of explanation exhaust blower 10 is relatively big, now air draft control unit 50
The output set-point controlling exhaust blower 10 increases by the second preset value, i.e. output set-point P=P+ △ P2, to improve row
The output of blower fan 10.Wherein, dn is the difference between the rotary speed actual value of exhaust blower 10 and rotating speed reference value, due to combustion gas
When water heater produces in a large number, exhaust blower component and machine system exist and there is little bit different in performance, and this difference may affect
The accuracy that gas heater controls, therefore, it can the difference between the rotary speed actual value by exhaust blower 10 and rotating speed reference value
Value carries out difference correction to exhaust blower speed curves (i.e. the default outlet blast curve of exhaust blower).
It is to say, when the output set-point of exhaust blower 10 is P1, if the rotating speed R ＜ of the exhaust blower 10 of detection
C, then be adjusted to P1-△ P1 by the output set-point of exhaust blower 10；If C≤R ＜ B, then the output of exhaust blower 10
Set-point keeps P1 constant；If B≤R is ＜ A, then the output set-point of exhaust blower 10 is adjusted to P1+ △ P2, thus real
The now active to the rotating speed of exhaust blower controls, it is ensured that the air quantity of exhaust blower and the blast of air outlet can be rapidly achieved balance, protect
Card gas heater has good burning condition.
It is appreciated that the output set-point shown in Fig. 2 and the first curve R1+dn, the second curve R2+dn and the 3rd song
Relation between line R3+dn is revised outlet blast curve, and wherein, R1, R2, R3 are multiple preset rotation speed, R1,
R2, R3 are the tachometer value pre-setting storage, in order to judge the outlet blast situation of exhaust blower 10.
In addition, it is necessary to explanation, can only when gas heater works first, to exhaust blower 10 default go out one's intention as revealed in what one says
Line of buckling is modified, thus, it is possible to reduce the security control time of gas heater, and reduces energy consumption.
According to one embodiment of present invention, as it is shown on figure 3, the safety control system of above-mentioned gas heater also wraps
Including: system control unit 60, system control unit 60 is in communication with each other with air draft control unit 50, wherein, if air draft control
Unit 50 processed judge the air outlet blast situation of exhaust blower 10 as the highest blast situation, or the rotating speed of exhaust blower 10 is more than rotating speed
Threshold value, air draft control unit 50 then sends stopping signal to system control unit 60, so that system control unit 60 is according to shutdown
Signal controls gas heater and shuts down.
Specifically, as in figure 2 it is shown, under a certain output set-point of exhaust blower 10, if the rotating speed R of exhaust blower 10
Be positioned at the top (region IV) of the 3rd curve R3+dn, then the blast of the air outlet of explanation exhaust blower 10 is too high, now needs to control
Gas heater is shut down, such as, when the output set-point of exhaust blower 10 is P1, if the rotating speed R >=A of exhaust blower 10,
Then control gas heater to shut down；Or, if the rotating speed of current exhaust blower 10 is higher than the rotary speed threshold value (maximum limit set
Rotating speed), then control steam water heater and shut down, thus the safety of gas heater is effectively ensured.
According to one embodiment of present invention, as it is shown on figure 3, the safety control system of above-mentioned gas heater also wraps
Include: to water unit 70 and temperature acquiring unit (in figure not specifically illustrated).Wherein, to water unit 70 and system control unit 60 phase
Even, temperature acquiring unit is connected with system control unit 60, and temperature acquiring unit sets for the water outlet obtaining gas heater
Temperature and the cold water temperature of gas heater, system control unit 60 is according to the confluent of water unit 70, water outlet design temperature
Calculate total amount of heat needed for gas heater with cold water temperature, and obtain electric current control instruction according to total amount of heat needed for gas heater
Initial output power set-point with exhaust blower 10.
Further, as it is shown on figure 3, the safety control system of above-mentioned gas heater also includes: combustion unit 80, combustion
Gas unit 80 is connected with system control unit 60, and combustion unit 80 has proportioning valve (not specifically illustrated in figure), wherein, system control
Unit 60 processed according to electric current control instruction by control proportioning valve so that combustion unit 80 is controlled.
Specifically, after gas heater works on power, the gas and hot water that system control unit 60 first sets according to user
The water outlet design temperature of device, calculate gas heater to confluent and the cold water temperature of water unit 70 cool water heating is set to water outlet
Total amount of heat needed for fixed temperature, then, as shown in Figure 4, system control unit 60 obtains according to total amount of heat needed for gas heater
In combustion unit 80, the controlled quentity controlled variable (i.e. electric current control instruction) of proportioning valve and the output set-point of exhaust blower 10 are using as just
Beginning output set-point.Finally, system control unit 50 is controlled according to the controlled quentity controlled variable comparative example valve of the proportioning valve obtained,
So that combustion unit 80 is controlled, and initial output power set-point is sent to air draft control unit by CAN etc.
50.Wherein it is desired to explanation, as it is shown in figure 5, gas heater production phase or when running first, can be according to exhaust blower
The output set-point of 10 obtains the rotating speed reference value of exhaust blower 10, and runs sampling contrast program, i.e. detects output
The rotary speed actual value of the exhaust blower 10 that set-point is corresponding, and then the difference between rotary speed actual value and rotating speed reference value can be obtained,
And then air-blower control unit can be according to the default outlet blast curve of this difference correction exhaust blower.
Be appreciated that the output set-point of exhaust blower obtained according to total amount of heat needed for gas heater be for
Determine the output set-point of one's intention as revealed in what one says pressure situation and for the output set-point regulated.
Air draft control unit 50, after being modified the outlet blast curve of exhaust blower 10, receives initial output power
Set-point, is controlled exhaust blower 10 according to initial output power set-point, and simultaneously real-time by rotation speed detection unit 30
The rotating speed of detection exhaust blower 10.If the rotating speed of the exhaust blower 10 of detection is positioned at the region I of revised outlet blast curve, then
The output set-point P=P of exhaust blower 10Initially-△ P1, wherein, PInitiallyFor initial output power set-point；If the row of detection
The rotating speed of blower fan 10 is positioned at region II, then the output set-point P=P of exhaust blower 10Initially；If the exhaust blower 10 of detection
Rotating speed is positioned at region III, then the output set-point P=P of exhaust blower 10Initially+△P2.Go down, directly according to above-mentioned steps circulation
To a certain output set-point, the rotating speed of exhaust blower 10 is positioned at region IV, or the rotating speed of exhaust blower 10 is more than rotating speed threshold
Value, or receive user and control halt instruction, control gas heater and shut down.
In gas heater running, if water outlet design temperature changes, or send out to the confluent of water unit 70
Raw changes etc., then the initial output power of controlled quentity controlled variable and gas heater that system control unit 60 reacquires proportioning valve gives
Value, and according to above-mentioned steps, gas heater is controlled.
In an embodiment of the present invention, gas heater can be forced exhaust formula gas heater, does not does
Limit.
The safety control system of gas heater according to embodiments of the present invention, first passes through power obtaining unit and obtains row
The output set-point of blower fan, runs and passes through rotating speed difference acquiring unit according to output set-point from sampling contrast program
Obtain corresponding rotary speed actual value, and calculate the difference between the rotary speed actual value of exhaust blower and rotating speed reference value, and air draft
Control unit is according to the default outlet blast of the difference correction exhaust blower between rotary speed actual value and the rotating speed reference value of exhaust blower
Curve, then, air draft control unit is according to the rotating speed of exhaust blower, revised outlet blast curve and the output of exhaust blower
Set-point judges the air outlet blast situation of exhaust blower, and regulates the output of exhaust blower according to the air outlet blast situation of exhaust blower
Power set-point, thus realize the regulation to the air quantity of exhaust blower, it is ensured that gas heater in operation process, the combustion introduced
Gas can reach good burning condition with air after mixing, it is ensured that the safe and reliable operation of gas heater.Meanwhile, the most right
The output set-point of exhaust blower is adjusted as active control, compared to the passive control that the rotating speed of exhaust blower is carried out,
Not only fast response time, and accurate air quantity can be provided, improve control accuracy.
Fig. 6 is the flow chart of the method for controlling security of gas heater according to embodiments of the present invention.As shown in Figure 6, should
The method of controlling security of gas heater comprises the following steps:
S1, obtains output set-point and the rotating speed benchmark of the exhaust blower corresponding with output set-point of exhaust blower
Value.
S2, obtains the rotary speed actual value of exhaust blower, and calculates rotary speed actual value according to the output set-point of exhaust blower
And the difference between the rotating speed reference value of exhaust blower.
S3, according to the default outlet blast curve of difference correction exhaust blower, wherein, described default outlet blast curve is institute
State the relation curve between output set-point and multiple preset rotation speed.
S4, the rotating speed of exhaust blower in detection gas heater.
S5, judges according to the output set-point of the rotating speed of exhaust blower, revised outlet blast curve and exhaust blower
The air outlet blast situation of exhaust blower, and give according to the output of the air outlet blast situation regulation exhaust blower of exhaust blower
Value.
Specifically, in gas heater first work process, first obtain exhaust blower power output set-point and
Corresponding rotating speed reference value, under base condition, runs sampling contrast program, i.e. exports set-point according to the power of exhaust blower and obtain
Take the rotary speed actual value of correspondence, and calculate the difference between rotary speed actual value and rotating speed reference value, and according to rotary speed actual value
And the default outlet blast curve of the difference correction exhaust blower between rotating speed reference value, this presets outlet blast curve is output work
Relation curve between rate set-point and multiple preset rotation speed (such as 3 preset rotation speed).And then at gas heater this or it
After work process in, detect in real time the rotating speed of exhaust blower, and combine the current of revised outlet blast curve and exhaust blower
Output set-point judges the air outlet blast situation of exhaust blower, then according to the output to exhaust blower of the air outlet blast situation
Power set-point is adjusted, thus realizes the regulation to the air quantity of exhaust blower, it is ensured that gas heater in operation process, institute
The combustion gas introduced can reach good burning condition with air after mixing, it is ensured that the safety and reliability of gas heater.
Meanwhile, directly the output set-point to exhaust blower is adjusted as active control, carries out compared to the rotating speed of exhaust blower
Passive control, not only fast response time, and accurate air quantity can be provided, improve control accuracy.
In one embodiment of the invention, according to the difference correction exhaust blower between rotary speed actual value and rotating speed reference value
Default outlet blast curve time, revised outlet blast curve is output set-point and multiple preset rotation speed and above-mentioned
Relation curve between difference sum.
Further, give according to the output of the rotating speed of exhaust blower, revised outlet blast curve and exhaust blower
Value judges the air outlet blast situation of exhaust blower, and regulates the output of exhaust blower according to the air outlet blast situation of exhaust blower
Set-point, including: if it is determined that the air outlet blast situation of exhaust blower is low blast situation, then control the output of exhaust blower
Set-point reduces by the first preset value；If it is determined that the air outlet blast situation of exhaust blower is middle blast situation, then control exhaust blower
Output set-point keep constant；If it is determined that the air outlet blast situation of exhaust blower is high blast situation, then control row
The output set-point of blower fan increases by the second preset value.
Specifically, as in figure 2 it is shown, under a certain output set-point of exhaust blower, if the rotating speed R of exhaust blower is positioned at
The lower section (region I) of the first curve R1+dn, then illustrate that the blast of the air outlet of exhaust blower is smaller, now controls exhaust blower
Output set-point reduces by the first preset value, i.e. output set-point P=P-△ P1, to reduce the output work of exhaust blower
Rate；If the rotating speed R of exhaust blower is positioned at the top of the first curve R1+dn and is positioned at the lower section (region II) of the second curve R2+dn,
Then illustrate that the blast of the air outlet of exhaust blower is appropriate with the rotating ratio of exhaust blower, when blast increases, due to the thing of exhaust blower
Reason characteristic, exhaust blower can improve rotating speed, therefore without being adjusted the output set-point of exhaust blower by nature；If air draft
The rotating speed R of machine is positioned at the top of the second curve R2+dn and is positioned at the lower section (region III) of the 3rd curve R3+dn, then air draft is described
The wind pressure ratio of the air outlet of machine is relatively big, and the output set-point now controlling exhaust blower increases the second preset value, i.e. output work
Rate set-point P=P+ △ P2, to improve the output of exhaust blower.Wherein, dn is rotary speed actual value and the rotating speed base of exhaust blower
Difference between quasi-value, when producing in a large number due to gas heater, exhaust blower component and machine system exist and exist in performance
Being permitted difference, this difference may affect the accuracy that gas heater controls, and therefore, it can the rotary speed actual value by exhaust blower
And the difference between rotating speed reference value carries out difference correction to exhaust blower speed curves (i.e. outlet blast curve).
It is to say, when the output set-point of exhaust blower is P1, if the rotating speed R ＜ C of the exhaust blower of detection, then
The output set-point of exhaust blower is adjusted to P1-△ P1；If C≤R is ＜ B, then the output set-point of exhaust blower is protected
Hold P1 constant；If B≤R is ＜ A, then the output set-point of exhaust blower is adjusted to P1+ △ P2, thus realizes exhaust blower
The active of air quantity control, it is ensured that the air quantity of exhaust blower and the blast of air outlet can be rapidly achieved balance, it is ensured that gas and hot water
Utensil has good burning condition.
It is appreciated that the output set-point shown in Fig. 2 and the first curve R1+dn, the second curve R2+dn and the 3rd song
Relation between line R3+dn is revised outlet blast curve, and wherein, R1, R2, R3 are 3 preset rotation speed, R1, R2,
R3 is the tachometer value pre-setting storage, in order to judge the outlet blast situation of exhaust blower.
In addition, it is necessary to explanation, can default outlet blast only when gas heater works first, to exhaust blower
Curve is modified, thus, it is possible to reduce the security control time of gas heater, and reduces energy consumption.
Further, give according to the output of the rotating speed of exhaust blower, revised outlet blast curve and exhaust blower
Value judges the air outlet blast situation of exhaust blower, and regulates the output of exhaust blower according to the air outlet blast situation of exhaust blower
Set-point, also includes: if it is determined that the air outlet blast situation of exhaust blower is the highest blast situation, or the rotating speed of exhaust blower is big
In rotary speed threshold value, then control gas heater and shut down.
Specifically, as in figure 2 it is shown, under a certain output set-point of exhaust blower, if the rotating speed R of exhaust blower is positioned at
The top (region IV) of the 3rd curve R3+dn, then illustrate that the blast of the air outlet of exhaust blower is too high, now needs to control combustion gas heat
Hydrophone is shut down, such as, when the output set-point of exhaust blower is P1, if the rotating speed R >=A of exhaust blower, then control combustion gas
Water heater is shut down；Or, if the rotating speed of current exhaust blower is higher than the rotary speed threshold value (maximum limit rotating speed) set, then control
Steam water heater is shut down, thus the safety of gas heater is effectively ensured.
According to one embodiment of present invention, the method for controlling security of above-mentioned gas heater, also include: obtain combustion gas
The confluent of water heater, and obtain the water outlet design temperature of gas heater, and obtain the cold water temperature of gas heater；Root
Calculate total amount of heat needed for gas heater according to confluent, water outlet design temperature and cold water temperature, and according to gas heater needed for
Total amount of heat obtains electric current control instruction and the initial output power set-point of exhaust blower；Fired by control according to electric current control instruction
In gas water heater, the proportioning valve of combustion unit is to carry out Combustion System.
Specifically, after gas heater works on power, the water outlet of the gas heater first set according to user sets temperature
Degree, confluent and cold water temperature calculating gas heater are by the total amount of heat needed for cool water heating to water outlet design temperature, then, as
Shown in Fig. 4, obtain the controlled quentity controlled variable (i.e. electric current control instruction) of proportioning valve in combustion unit according to total amount of heat needed for gas heater
With the output set-point of exhaust blower using as initial output power set-point.Finally, according to the control of the proportioning valve obtained
Amount comparative example valve is controlled, and to be controlled combustion unit, and carries out exhaust blower according to initial output power set-point
Control.
Detect the rotating speed of exhaust blower in real time, and it is judged.At initial output power set-point PInitiallyUnder, if inspection
The rotating speed of the exhaust blower surveyed is positioned at the region I of the revised outlet blast curve shown in Fig. 2, then the output of exhaust blower is given
Definite value P=PInitially-△P1；If the rotating speed of the exhaust blower of detection is positioned at region II, then the output set-point P=of exhaust blower
PInitially；If the rotating speed of the exhaust blower of detection is positioned at region III, then the output set-point P=P of exhaust blowerInitially+△P2.Press
Go down, until the rotating speed of exhaust blower is positioned at region IV, or exhaust blower under a certain output set-point according to above-mentioned steps circulation
Rotating speed more than rotary speed threshold value, or receive user and control halt instruction, control gas heater and shut down.
In gas heater running, if water outlet design temperature changes, or confluent changes, then weigh
The new controlled quentity controlled variable obtaining proportioning valve and the initial output power set-point of gas heater, and according to above-mentioned steps to gas and hot water
Device is controlled.
The method of controlling security of gas heater according to embodiments of the present invention, first obtain the output of exhaust blower to
Definite value and the rotating speed reference value of corresponding exhaust blower, and obtain the rotating speed of exhaust blower in fact according to the output set-point of exhaust blower
Actual value, calculates the difference between rotary speed actual value and rotating speed reference value, and the default outlet according to this difference correction exhaust blower
Blast curve, it is then detected that the rotating speed of exhaust blower, according to the rotating speed of exhaust blower, revised outlet blast curve and exhaust blower
Output set-point judge the air outlet blast situation of exhaust blower, and regulate row according to the air outlet blast situation of exhaust blower
The output set-point of blower fan, thus realize the regulation to the air quantity of exhaust blower, it is ensured that gas heater in operation process,
The combustion gas introduced can reach good burning condition with air after mixing, it is ensured that the safe and reliable operation of gas heater.
Meanwhile, directly the output set-point to exhaust blower is adjusted as active control, carries out compared to the rotating speed of exhaust blower
Passive control, not only fast response time, and accurate air quantity can be provided, improve control accuracy.
Additionally, embodiments of the invention also proposed a kind of gas heater, it includes the peace of above-mentioned gas heater
Full control system.
The gas heater of the embodiment of the present invention, by above-mentioned safety control system, it is possible to according to the rotating speed of exhaust blower
The default outlet blast curve of the difference correction exhaust blower between actual value and rotating speed reference value, and according to the rotating speed of exhaust blower,
The output set-point of revised outlet blast curve and exhaust blower judges the air outlet blast situation of exhaust blower, and according to
The output set-point of the air outlet blast situation regulation exhaust blower of exhaust blower, thus realize the tune of the air quantity to exhaust blower
Joint, it is ensured that gas heater is in operation process, and the combustion gas introduced can reach good burning condition with air after mixing,
Ensure the safe and reliable operation of gas heater, and, directly the output set-point to exhaust blower is adjusted as actively
Control, compared to the passive control that the rotating speed of exhaust blower is carried out, not only fast response time, and can provide accurate
Air quantity, improves control accuracy.
In describing the invention, it is to be understood that term " " center ", " longitudinally ", " laterally ", " length ", " width ",
" thickness ", " on ", D score, "front", "rear", "left", "right", " vertically ", " level ", " top ", " end " " interior ", " outward ", " up time
Pin ", " counterclockwise ", " axially ", " radially ", the orientation of the instruction such as " circumferential " or position relationship be based on orientation shown in the drawings or
Position relationship, is for only for ease of the description present invention and simplifies description rather than instruction or imply that the device of indication or element must
Must have specific orientation, with specific azimuth configuration and operation, be therefore not considered as limiting the invention.
Additionally, term " first ", " second " are only used for describing purpose, and it is not intended that instruction or hint relative importance
Or the implicit quantity indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can express or
Implicitly include at least one this feature.In describing the invention, " multiple " are meant that at least two, such as two, three
Individual etc., unless otherwise expressly limited specifically.
In the present invention, unless otherwise clearly defined and limited, term " install ", " being connected ", " connection ", " fixing " etc.
Term should be interpreted broadly, and connects for example, it may be fixing, it is also possible to be to removably connect, or integral；Can be that machinery connects
Connect, it is also possible to be electrical connection；Can be to be joined directly together, it is also possible to be indirectly connected to by intermediary, in can being two elements
The connection in portion or the interaction relationship of two elements, unless otherwise clear and definite restriction.For those of ordinary skill in the art
For, above-mentioned term concrete meaning in the present invention can be understood as the case may be.
In the present invention, unless otherwise clearly defined and limited, fisrt feature second feature " on " or D score permissible
It is that the first and second features directly contact, or the first and second features are by intermediary mediate contact.And, fisrt feature exists
Second feature " on ", " top " and " above " but fisrt feature directly over second feature or oblique upper, or be merely representative of
Fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " lower section " and " below " can be
One feature is immediately below second feature or obliquely downward, or is merely representative of fisrt feature level height less than second feature.
In the description of this specification, reference term " embodiment ", " some embodiments ", " example ", " specifically show
Example " or the description of " some examples " etc. means to combine this embodiment or example describes specific features, structure, material or spy
Point is contained at least one embodiment or the example of the present invention.In this manual, to the schematic representation of above-mentioned term not
Identical embodiment or example must be directed to.And, the specific features of description, structure, material or feature can be in office
One or more embodiments or example combine in an appropriate manner.Additionally, in the case of the most conflicting, the skill of this area
The feature of the different embodiments described in this specification or example and different embodiment or example can be tied by art personnel
Close and combination.
Although above it has been shown and described that embodiments of the invention, it is to be understood that above-described embodiment is example
Property, it is impossible to being interpreted as limitation of the present invention, those of ordinary skill in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, revises, replaces and modification.
Claims (13)
1. the safety control system of a gas heater, it is characterised in that including:
Exhaust blower, produced waste gas when being used for discharging gas heater burning；
Rotation speed detection unit, for detecting the rotating speed of described exhaust blower；
Power obtaining unit, for obtaining the output set-point of described exhaust blower；
Rotating speed difference acquiring unit, the rotating speed obtaining described exhaust blower for the output set-point according to described exhaust blower is real
The rotating speed reference value of actual value and described exhaust blower, and calculate the difference between described rotary speed actual value and described rotating speed reference value；
And
Air draft control unit, described air draft control unit respectively with described exhaust blower, described rotation speed detection unit, described speed discrepancy
Value acquiring unit is connected with described power obtaining unit, for the default outlet blast according to exhaust blower described in described difference correction
Curve, and according to the rotating speed of described exhaust blower, revised outlet blast curve and the output set-point of described exhaust blower
Judge the air outlet blast situation of described exhaust blower, and regulate described exhaust blower according to the air outlet blast situation of described exhaust blower
Output set-point, wherein, described default outlet blast curve is described output set-point and multiple preset rotation speed
Between relation curve.
The safety control system of gas heater the most according to claim 1, it is characterised in that described air draft control unit
During default outlet blast curve according to exhaust blower described in described difference correction,
Revised outlet blast curve is described output set-point and the plurality of preset rotation speed and described difference sum
Between relation curve.
The safety control system of gas heater the most according to claim 2, it is characterised in that described air draft control unit
The output set-point of the rotating speed according to described exhaust blower, revised outlet blast curve and described exhaust blower judges described
The air outlet blast situation of exhaust blower, and the output work of described exhaust blower is regulated according to the air outlet blast situation of described exhaust blower
During rate set-point, wherein,
If described air draft control unit judges that the air outlet blast situation of described exhaust blower is low blast situation, then control described
The output set-point of exhaust blower reduces by the first preset value；
If described air draft control unit judges that the air outlet blast situation of described exhaust blower is middle blast situation, then control described
The output set-point of exhaust blower keeps constant；
If described air draft control unit judges that the air outlet blast situation of described exhaust blower is high blast situation, then control described
The output set-point of exhaust blower increases by the second preset value.
4. according to the safety control system of the gas heater according to any one of claim 1-3, it is characterised in that also include
System control unit, described system control unit is in communication with each other with described air draft control unit, wherein,
If described air draft control unit judges that the air outlet blast situation of described exhaust blower is as the highest blast situation or described
The rotating speed of exhaust blower is more than rotary speed threshold value, and described air draft control unit then sends stopping signal extremely described system control unit, with
Make described system control unit control described gas heater according to described stopping signal to shut down.
The safety control system of gas heater the most according to claim 4, it is characterised in that also include:
To water unit, described it is connected with described system control unit to water unit；
Temperature acquiring unit, described temperature acquiring unit is connected with described system control unit, is used for obtaining described gas and hot water
The water outlet design temperature of device and the cold water temperature of described gas heater, wherein,
Described system control unit according to described to the confluent of water unit, described water outlet design temperature and described cold water temperature meter
Calculate total amount of heat needed for described gas heater, and obtain electric current control instruction and institute according to total amount of heat needed for described gas heater
State the initial output power set-point of exhaust blower.
The safety control system of gas heater the most according to claim 5, it is characterised in that also include combustion unit,
Described combustion unit is connected with described system control unit, and described combustion unit has proportioning valve, wherein,
Described system control unit according to described electric current control instruction by control described proportioning valve so that described combustion unit is entered
Row controls.
The safety control system of gas heater the most according to claim 1, it is characterised in that described gas heater is
Forced exhaust formula gas heater.
8. a gas heater, it is characterised in that include according to the gas heater according to any one of claim 1-7
Safety control system.
9. the method for controlling security of a gas heater, it is characterised in that comprise the following steps:
Obtain the output set-point of exhaust blower and corresponding rotating speed reference value；
Output set-point according to described exhaust blower obtains the rotary speed actual value of described exhaust blower, and it is real to calculate described rotating speed
Difference between actual value and described rotating speed reference value；
According to the default outlet blast curve of exhaust blower described in described difference correction, wherein, described default outlet blast curve is
Relation curve between described output set-point and multiple preset rotation speed；
Detect the rotating speed of exhaust blower in described gas heater；And
The output set-point of the rotating speed according to described exhaust blower, revised outlet blast curve and described exhaust blower judges
The air outlet blast situation of described exhaust blower, and regulate the defeated of described exhaust blower according to the air outlet blast situation of described exhaust blower
Go out power set-point.
The method of controlling security of gas heater the most according to claim 9, it is characterised in that described according to described difference
When value revises the default outlet blast curve of described exhaust blower,
Revised outlet blast curve is described output set-point and the plurality of preset rotation speed and described difference sum
Between relation curve.
The method of controlling security of 11. gas heaters according to claim 10, it is characterised in that described according to described row
The output set-point of the rotating speed of blower fan, revised outlet blast curve and described exhaust blower judges going out of described exhaust blower
Air port blast situation, and the output set-point of described exhaust blower is regulated according to the air outlet blast situation of described exhaust blower,
Including:
If it is determined that the air outlet blast situation of described exhaust blower is low blast situation, then control the output of described exhaust blower
Set-point reduces by the first preset value；
If it is determined that the air outlet blast situation of described exhaust blower is middle blast situation, then control the output of described exhaust blower
Set-point keeps constant；
If it is determined that the air outlet blast situation of described exhaust blower is high blast situation, then control the output of described exhaust blower
Set-point increases by the second preset value.
12. according to the method for controlling security of the gas heater according to any one of claim 9-11, it is characterised in that described
The output set-point of the rotating speed according to described exhaust blower, revised outlet blast curve and described exhaust blower judges described
The air outlet blast situation of exhaust blower, and the output work of described exhaust blower is regulated according to the air outlet blast situation of described exhaust blower
Rate set-point, also includes:
If it is determined that the air outlet blast situation of described exhaust blower is the highest blast situation, or the rotating speed of described exhaust blower is more than
Rotary speed threshold value, then control described gas heater and shut down.
The method of controlling security of 13. gas heaters according to claim 9, it is characterised in that also include:
Obtain the confluent of described gas heater, and obtain the water outlet design temperature of described gas heater, and obtain institute
State the cold water temperature of gas heater；
According to total heat needed for described confluent, described water outlet design temperature and the described cold water temperature described gas heater of calculating
Amount, and give according to the initial output power of total amount of heat acquisition electric current control instruction and described exhaust blower needed for described gas heater
Definite value；
Control to carry out burning by controlling the proportioning valve of combustion unit in described gas heater according to described electric current control instruction
System.
Priority Applications (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610794742.5A CN106225249B (en) | 2016-08-31 | 2016-08-31 | Gas water heater and safety control system and method thereof |
| JP2019512266A JP2019529852A (en) | 2016-08-31 | 2016-12-30 | Gas water heater and safety control system and method thereof |
| EP16869366.1A EP3318813B1 (en) | 2016-08-31 | 2016-12-30 | Gas water heater and security control system and method therefor |
| PCT/CN2016/113792 WO2018040447A1 (en) | 2016-08-31 | 2016-12-30 | Gas water heater and security control system and method therefor |
| ES16869366T ES2735200T3 (en) | 2016-08-31 | 2016-12-30 | Gas water heater and safety control system and associated procedure |
| US16/289,616 US10775078B2 (en) | 2016-08-31 | 2019-02-28 | Gas water heater and safety control method and system therefor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610794742.5A CN106225249B (en) | 2016-08-31 | 2016-08-31 | Gas water heater and safety control system and method thereof |
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| CN106225249B CN106225249B (en) | 2020-04-24 |
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