CN107091484B - Gas furnace control method, control device and gas furnace - Google Patents
Gas furnace control method, control device and gas furnace Download PDFInfo
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- CN107091484B CN107091484B CN201710321564.9A CN201710321564A CN107091484B CN 107091484 B CN107091484 B CN 107091484B CN 201710321564 A CN201710321564 A CN 201710321564A CN 107091484 B CN107091484 B CN 107091484B
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- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N5/00—Systems for controlling combustion
- F23N5/18—Systems for controlling combustion using detectors sensitive to rate of flow of air or fuel
- F23N5/188—Systems for controlling combustion using detectors sensitive to rate of flow of air or fuel using mechanical means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N2225/00—Measuring
- F23N2225/08—Measuring temperature
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- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
A kind of gas furnace control method provided by the invention, wherein the control method is the following steps are included: obtain the first moment flue-gas temperature；Judge whether the first moment flue-gas temperature is lower than the first preset temperature；When the first moment flue-gas temperature is lower than first preset temperature, control gas ratio valve enters flue gas condensation working condition.Above-mentioned gas furnace control method, the working condition of gas ratio valve is adjusted according to flue-gas temperature, when flue-gas temperature is lower than the first preset temperature, control gas ratio valve enters flue gas condensation working condition, it can be avoided the too low condensation of flue-gas temperature to corrode caused by gas furnace to lead to the problem of condensed water, improve the safety in utilization of gas furnace and prolong its service life.
Description
Technical field
The present invention relates to heat recovery fields, more particularly to a kind of gas furnace control method, control device and combustion
Steam stove.
Background technique
In recent years, gas furnace industry development is very swift and violent, and many producers are continuously increased main heat exchange to pursue high thermal efficiency
The size of device or secondary heat exchanger causes flue gas exhaust gas temperature excessively low, finally produces on secondary heat exchanger, exhaust fume collecting hood or blower
Raw condensation, this, to each component of gas furnace, such as main heat exchanger, burner, secondary heat exchanger, collects cigarette with corrosive condensed water
Cover, blower can generate corrosiveness, directly threaten product using safe and service life.
Summary of the invention
Based on this, it is necessary to aiming at the problem that the too low condensation of flue gas is corroded caused by gas furnace, provide a kind of gas furnace
Control method, control device and gas furnace.
A kind of gas furnace control method provided by the invention, wherein the control method the following steps are included:
Obtain the first moment flue-gas temperature；
Judge whether the first moment flue-gas temperature is lower than the first preset temperature；
When the first moment flue-gas temperature is lower than first preset temperature, control gas ratio valve enters flue gas
Condense working condition；
Wherein, first preset temperature is higher than flue gas dew point temperature.
In one of the embodiments, before the step of obtaining the first moment flue-gas temperature, the control method
It is further comprising the steps of:
Obtain the operation duration of the gas furnace；
Judge whether the operation duration is greater than default operation duration；
When the operation duration is greater than the default operation duration, the first moment flue-gas temperature is obtained.
The control gas ratio valve enters the step of flue gas condensation working condition packet in one of the embodiments,
It includes: keeping the gas ratio valve output power constant and/or tune up the gas ratio valve output power.
Enter the step of flue gas condensation working condition in the gas ratio valve of control gas furnace in one of the embodiments,
After rapid, the control method is further comprising the steps of:
Obtain the second moment flue-gas temperature；
Judge whether the second moment flue-gas temperature is lower than the second preset temperature, wherein second preset temperature is lower than
First preset temperature；
When the second moment flue-gas temperature is lower than second preset temperature, the gas ratio valve output work is tuned up
Rate.
In one of the embodiments, when the second moment flue-gas temperature is not less than second preset temperature, sentence
Whether the second moment flue-gas temperature of breaking is lower than the first preset temperature step；When the second moment flue-gas temperature is lower than
When first preset temperature, control gas ratio valve enters flue gas condensation working condition.
In one of the embodiments, after described the step of tuning up the gas ratio valve output power, the control
Method processed further include:
Obtain third moment flue-gas temperature；
Judge whether third moment flue-gas temperature is higher than third preset temperature, wherein third preset temperature is optionally greater than first
Preset temperature；
When third moment flue-gas temperature is higher than third preset temperature, control gas ratio valve exits flue gas condensation work
State.
In one of the embodiments, when the first moment flue-gas temperature is lower than first preset temperature, control
The gas ratio valve of gas furnace enter flue gas condensation working condition the step of include following sub-step:
When the first moment flue-gas temperature is lower than first preset temperature, the first moment flue-gas temperature is judged
Whether the 4th preset temperature is lower than, wherein the third preset temperature is lower than first preset temperature；
When the first moment flue-gas temperature is lower than four preset temperature, the gas ratio valve output work is tuned up
Rate；
When the first moment flue-gas temperature is not less than four preset temperature, the gas ratio valve is kept to export
Power invariability.
A kind of gas-fired furnace controlling device provided by the invention, wherein obtain module and gas furnace control including flue-gas temperature
Device processed, the flue-gas temperature obtain module and connect with the gas furnace controller communication；
The flue-gas temperature obtains module, for obtaining the first moment flue-gas temperature；
The combustion gas furnace controller includes memory module, the first temperature judgment module and gas ratio valve control module,
Wherein,
The memory module, for storing the first preset temperature, wherein first preset temperature is higher than flue gas dew point temperature
Degree；
The first temperature judgment module, for judging it is default whether the first moment flue-gas temperature is lower than described first
Temperature；
The gas ratio valve control module, for being lower than first preset temperature when the first moment flue-gas temperature
When, control gas ratio valve enters flue gas condensation working condition.
The combustion gas furnace controller further includes that operation duration obtains module and operation duration in one of the embodiments,
Judgment module, wherein
The operation duration obtains module, for obtaining the operation duration of the gas furnace；
The memory module is also used to store default operation duration；
The operation duration judgment module, for judging whether the operation duration is greater than the default operation duration；
The flue-gas temperature obtains module, for obtaining institute when the operation duration is greater than the default operation duration
State the first moment flue-gas temperature.
In one of the embodiments, the gas ratio valve control module include the first flue gas condensation submodule and/
Or second flue gas condense submodule；
First flue gas condenses submodule, for keeping the gas ratio valve output power constant；
Second flue gas condenses submodule, for tuning up the gas ratio valve output power.
The flue-gas temperature obtains module in one of the embodiments, is also used to obtain the second moment flue-gas temperature；
The memory module is also used to store the second preset temperature, wherein second preset temperature is lower than described first
Preset temperature；
The combustion gas furnace controller further includes second temperature judgment module,
The second temperature judgment module, for judging it is default whether the second moment flue-gas temperature is lower than described second
Temperature；
When the second moment flue-gas temperature is lower than the second preset temperature, the gas ratio valve control module tunes up institute
State gas ratio valve output power.
In one of the embodiments, when the second moment flue-gas temperature is not less than second preset temperature, institute
The first temperature judgment module is stated, is also used to judge whether the second moment temperature is lower than first preset temperature；
The gas ratio valve control module is also used to when the second moment flue-gas temperature is lower than the described first default temperature
When spending, control gas ratio valve enters flue gas condensation working condition.
The flue-gas temperature obtains module in one of the embodiments, is also used to obtain third moment flue-gas temperature；
The memory module (220), is also used to store third preset temperature, wherein the third preset temperature is optionally greater than
First preset temperature；
The combustion gas furnace controller further includes third temperature judgment module；
The third temperature judgment module, for judging it is default whether the third moment flue-gas temperature is higher than the third
Temperature；
When the third moment flue-gas temperature is higher than third preset temperature, the gas ratio valve control module (300)
Control gas ratio valve exits flue gas condensation working condition.
The memory module in one of the embodiments, is also used to store the 4th preset temperature, wherein the third is pre-
If temperature is lower than first preset temperature；
The combustion gas furnace controller further includes the 4th temperature judgment module,
The 4th temperature judgment module, for being lower than first preset temperature when the first moment flue-gas temperature
When, judge whether the first moment flue-gas temperature is lower than the 4th preset temperature；
When the first moment flue-gas temperature is lower than four preset temperature, the gas ratio valve control module,
For tuning up the gas ratio valve output power；
When first moment is lower than first preset temperature and the first moment flue-gas temperature is not less than described the
Four preset temperatures, the gas ratio valve control module, for keeping the gas ratio valve output power constant.
A kind of gas furnace provided by the invention, wherein including temperature sensor and combustion gas furnace controller, the temperature is passed
Sensor is connect with the gas furnace controller communication, and the combustion gas furnace controller includes memory, processor and is stored in
On reservoir and the computer program that can run on a processor, the processor realize control as described above when executing described program
Method processed.
The temperature sensor is arranged at the blower or exhaust fume collecting hood of the gas furnace in one of the embodiments,.
The gas furnace includes secondary heat exchanger in one of the embodiments, and the temperature sensor is arranged described
On secondary heat exchanger.
Gas furnace control method of the invention adjusts the working condition of gas ratio valve according to flue-gas temperature, when flue gas temperature
When degree is lower than the first preset temperature, control gas ratio valve enters flue gas condensation working condition, can be avoided flue-gas temperature mistake
Low condensation is corroded caused by gas furnace to lead to the problem of condensed water, is improved the safety in utilization of gas furnace and is extended it
Service life.
Detailed description of the invention
In order to illustrate the technical solutions in the embodiments of the present application or in the prior art more clearly, below will be to institute in embodiment
Attached drawing to be used is needed to be briefly described, it should be apparent that, the accompanying drawings in the following description is only one recorded in the present invention
A little embodiments are also possible to obtain other drawings based on these drawings for those of ordinary skill in the art.
Fig. 1 is the flow chart of gas furnace control method embodiment one of the present invention；
Fig. 2 is the flow chart of gas furnace control method embodiment two of the present invention；
Fig. 3 is the flow chart of gas furnace control method embodiment three of the present invention；
Fig. 4 is the composition schematic diagram of gas-fired furnace controlling device example IV of the present invention；
Fig. 5 is the composition schematic diagram of gas-fired furnace controlling device embodiment five of the present invention；
Fig. 6 is the composition schematic diagram of gas-fired furnace controlling device embodiment six of the present invention.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, by the following examples, it and combines attached
Figure, is further elaborated gas furnace control method, control device and gas furnace of the invention.It should be appreciated that herein
Described specific examples are only used to explain the present invention, is not intended to limit the present invention.
It is the flow chart of gas furnace control method embodiment one to three of the present invention shown in please referring to Fig.1 to Fig.3.Continuing with
As shown in fig.1, the gas furnace control method of the embodiment of the present invention one the following steps are included:
S100 obtains the first moment flue-gas temperature；
S200, judges whether the first moment flue-gas temperature is lower than the first preset temperature；
S300, when the first moment flue-gas temperature is lower than the first preset temperature, control gas ratio valve enters Smoke prevention air cooling
Solidifying working condition；
Wherein, the first preset temperature is higher than flue gas dew point temperature.
Gas furnace control method of the invention adjusts the working condition of gas ratio valve according to flue-gas temperature, when flue gas temperature
When degree is lower than the first preset temperature, control gas ratio valve enters flue gas condensation working condition, can be avoided flue-gas temperature mistake
Low condensation is corroded caused by gas furnace to lead to the problem of condensed water, is improved the safety in utilization of gas furnace and is extended it
Service life.
As a kind of optional embodiment, the first preset temperature is higher than 1~5 DEG C of flue gas dew point temperature.First preset temperature
Higher than flue gas dew point temperature, it can be avoided flue-gas temperature and be reduced to flue gas dew point temperature hereinafter, to avoid flue gas from forming condensation
Aqueous corrosion combustion gas furnace.Further, if the first preset temperature is excessive higher than flue gas dew point temperature, the flue gas being finally discharged can be made
Temperature is excessively high, influences the recycling of flue gas heat, influences the efficiency of gas furnace.
Optionally, the first moment can be current time, then the first moment flue-gas temperature is the flue gas temperature at current time
Degree.
Optionally, the first moment flue-gas temperature is obtained, is also possible to obtain period flue-gas temperature belonging to the first moment,
What then the first moment flue-gas temperature referred to is period flue-gas temperature belonging to the first moment.When step S200 judges first at this time
It carves flue-gas temperature and whether is lower than the first preset temperature and can be and judge whether the first moment affiliated period flue-gas temperature is below
First preset temperature.By judging whether the first moment affiliated period flue-gas temperature is below the first preset temperature, can drop
Low control frequency avoids excessively continually regulating gas proportioning valve, causes gas furnace performance unstable.Optionally, the first moment
The length of affiliated period can be 1~5s.
Optionally, it includes: holding gas ratio valve that control gas ratio valve, which enters the step of flue gas condenses working condition,
Output power is constant and/or tunes up gas ratio valve output power.Control gas ratio valve enters flue gas condensation working condition,
It can be to maintain that its output power is constant, be also possible to tune up the state of its output power.I.e. flue gas condenses working condition not
It will appear the state for turning gas ratio valve output power down, avoid turning gas ratio valve output power down and further decrease flue gas temperature
Degree.
Please continue to refer to shown in Fig. 2, the difference of two gas furnace control method of the embodiment of the present invention and embodiment one is
It is further comprising the steps of before step S100:
S010 obtains the operation duration of gas furnace；
S020, judges whether operation duration is greater than default operation duration；
If operation duration is longer than default operation duration, step S100 is executed, that is, executes and obtains the first moment flue-gas temperature step
Suddenly.
When gas furnace initial launch, flue-gas temperature is lower at this time, if at this time by obtaining the first moment flue-gas temperature pair
Gas ratio valve is controlled, then may will adjust excessively high in the output power short period of gas ratio valve, is caused unreasonable
Adjusted result.When the operation duration of gas furnace is greater than default operation duration, gas furnace enters normal operating conditions at this time, at this time
Gas ratio valve is controlled by obtaining the first moment flue-gas temperature, flue-gas temperature can either be avoided too low, forms condensation
Aqueous corrosion gas furnace also can be avoided unreasonable regulating gas proportioning valve.Optionally, default operation duration can be 2~
4min。
As a kind of optional embodiment, two gas furnace control method of the embodiment of the present invention may be used also after step S300
The following steps are included:
S400 obtains the second moment flue-gas temperature；
S500, judges whether the second moment flue-gas temperature is lower than the second preset temperature, wherein second preset temperature is low
In first preset temperature；
S600 tunes up gas ratio valve output power when the second moment flue-gas temperature is lower than the second preset temperature.
After control gas ratio valve enters flue gas condensation working condition, i.e., adjusted indirectly by controlling gas ratio valve
After flue-gas temperature, obtain the second moment flue-gas temperature, can timely learning combusted proportion valve enter flue gas condensation working condition
Whether flue-gas temperature afterwards is effectively adjusted.When the second moment flue-gas temperature is lower than the second preset temperature, due to second
Preset temperature is lower than the first preset temperature, then knows that flue-gas temperature is not controlled effectively or adjusts, then further pass through
The output power for tuning up combusted proportion valve carries out the bigger adjusting of control intensity.
Optionally, when the step S300 constant flue gas of gas ratio valve output power that is to maintain implemented condenses work shape
When state, if the second moment flue-gas temperature is lower than the first preset temperature, illustrate that keep gas ratio valve output power constant prevents
Flue gas condensing working condition can not effectively be adjusted flue-gas temperature, then need to further enhance the adjusting force to flue-gas temperature
Degree, such as gas ratio valve output power can be tuned up.
When step S300 implement be tune up gas ratio valve output power flue gas condense working condition when, if second
Moment flue-gas temperature is lower than the first preset temperature, then explanation tunes up the flue gas condensation working condition of gas ratio valve output power
Flue-gas temperature can not effectively be adjusted, then need to further enhance the strength of adjustment to flue-gas temperature, such as can be into one
The big gas ratio valve output power of step.
Optionally, the second moment flue-gas temperature is obtained, is also possible to obtain period flue-gas temperature belonging to the second moment,
What then the second moment flue-gas temperature referred to is period flue-gas temperature belonging to the second moment.At this point, step S500 judges second
Whether moment flue-gas temperature, which is lower than the second preset temperature, can be judge whether the second moment affiliated period flue-gas temperature is low
In the second preset temperature.It, can be with by judging whether the second moment affiliated period flue-gas temperature is below the second preset temperature
Control frequency is reduced, excessively continually regulating gas proportioning valve is avoided, causes gas furnace performance unstable.
Optionally, at the time of the second moment can be 1~20s after the first moment.Further, the affiliated time at the second moment
The length of section can be 1~5s.
Optionally, the second preset temperature is lower than 1~3 DEG C of the first preset temperature.Further, the second preset temperature is not less than
Flue gas dew point temperature.
Second is judged when the second moment flue-gas temperature is not less than the second preset temperature as a kind of optional embodiment
Whether moment flue-gas temperature is lower than the first preset temperature, when the second moment flue-gas temperature is lower than the first preset temperature, control combustion
Gas proportioning valve enters flue gas condensation working condition.
Further, when the second moment flue-gas temperature is not less than the first preset temperature, control gas ratio valve exits anti-
Flue gas condensing working condition.
I.e. when the second moment flue-gas temperature is not less than the second preset temperature, step S200 is executed again, that is, judges second
Whether moment flue-gas temperature is lower than the first preset temperature.To constitute circulation between step S200, S300, S400, S500, directly
It is not less than the first preset temperature to flue-gas temperature.
It is further comprising the steps of after step S600 as a kind of optional embodiment:
S700 obtains third moment flue-gas temperature；
S800, judges whether third moment flue-gas temperature is higher than third preset temperature, wherein third preset temperature be higher than etc.
In the first preset temperature；
S900, when third moment flue-gas temperature is higher than third preset temperature, control gas ratio valve exits Smoke prevention air cooling
Solidifying working condition.
Optionally, gas ratio valve can enter ordinary temperature adjusting working condition after exiting flue gas condensation working condition.
For example, ordinary temperature, which adjusts working condition, can be PID (proportional-integral-differential) temp-controled mode.
Optionally, third preset temperature is higher than 1~3 DEG C of the first preset temperature.
Please continue to refer to shown in Fig. 3, three gas furnace control method of the embodiment of the present invention and embodiment one or embodiment two
Difference is that step S300 specifically includes following sub-step:
S310 judges whether the first moment flue-gas temperature is low when the first moment flue-gas temperature is lower than the first preset temperature
In the 4th preset temperature, wherein the 4th preset temperature is lower than the first preset temperature；
S320 tunes up gas ratio valve output power when the first moment flue-gas temperature is lower than four preset temperatures；
S330 keeps gas ratio valve output power permanent when the first moment flue-gas temperature is not less than four preset temperatures
It is fixed.
Optionally, the 4th preset temperature is lower than 1~3 DEG C of the first preset temperature, and further, third preset temperature is not less than
Flue gas dew point temperature.
Optionally, the 4th preset temperature may be the same or different with the second preset temperature.
As a kind of optional embodiment, the 4th preset temperature is optionally greater than the second preset temperature.
For example, tuning up gas ratio valve by step S320 when the first moment flue-gas temperature is lower than four preset temperatures
After output power adjusts flue-gas temperature, the second moment flue-gas temperature is obtained by step S400 again and step S500 judges the
Whether two moment flue-gas temperatures are lower than the second preset temperature.Since the second preset temperature is lower than the 4th preset temperature, if second
Moment flue-gas temperature is lower than the second preset temperature, then explanation, which tunes up flue gas proportioning valve output power by step S320, to realize
The purpose for adjusting flue-gas temperature, needs further to execute step S600 and tunes up gas ratio valve output power.
Based on the same inventive concept, the embodiment of the present invention provides a kind of gas-fired furnace controlling device, since the solution of this device is asked
The principle of topic is similar to aforementioned gas furnace control method, and therefore, the implementation of the device can be according to the specific steps of preceding method
It realizes, overlaps will not be repeated.
It please refers to shown in fig. 4 to fig. 6, is the composition figure of gas-fired furnace controlling device example IV provided by the invention to six.
Please continue to refer to shown in Fig. 4, including flue-gas temperature obtains module 100 and combustion gas furnace controller, and flue-gas temperature obtains module 100
It is connect with gas furnace controller communication, combustion gas furnace controller includes memory module 200, the first temperature judgment module 210 and combustion
Gas proportional valve control module 300.
Wherein, flue-gas temperature obtains module 100, for obtaining the first moment flue-gas temperature；
Memory module 200, for storing the first preset temperature；
First temperature judgment module 210, for judging whether the first moment flue-gas temperature is lower than the first preset temperature；
Gas ratio valve control module 300, for when the first moment flue-gas temperature is lower than the first preset temperature, control to be fired
Gas proportioning valve enters flue gas condensation working condition；
Wherein, the first preset temperature is higher than flue gas dew point temperature.
Gas-fired furnace controlling device of the invention adjusts the working condition of gas ratio valve according to flue-gas temperature, when flue gas temperature
When degree is lower than the first preset temperature, control gas ratio valve enters flue gas condensation working condition, can be avoided flue-gas temperature mistake
Low condensation is corroded caused by gas furnace to lead to the problem of condensed water, is improved the safety in utilization of gas furnace and is extended it
Service life.
As a kind of optional embodiment, the first preset temperature is higher than 1~5 DEG C of flue gas dew point temperature.First preset temperature
Higher than flue gas dew point temperature, it can be avoided flue-gas temperature and be reduced to flue gas dew point temperature hereinafter, to avoid flue gas from forming condensation
Aqueous corrosion combustion gas furnace.Further, if the first preset temperature is excessive higher than flue gas dew point temperature, the flue gas being finally discharged can be made
Temperature is excessively high, influences the recycling of flue gas heat, influences the efficiency of gas furnace.
Optionally, the first moment can be current time, then the first moment flue-gas temperature is the flue gas temperature at current time
Degree.
Optionally, the first moment flue-gas temperature is obtained, is also possible to obtain period flue-gas temperature belonging to the first moment,
What then the first moment flue-gas temperature referred to is period flue-gas temperature belonging to the first moment.First temperature judgment module at this time
210, which judge whether the first moment flue-gas temperature is lower than the first preset temperature and can be, judges the first moment affiliated period flue gas temperature
Whether degree is below the first preset temperature.By judging it is default whether the first moment affiliated period flue-gas temperature is below first
Temperature can reduce control frequency, avoid excessively continually regulating gas proportioning valve, cause gas furnace performance unstable.It is optional
The length on ground, affiliated period at the first moment can be 1~5s.
Optionally, gas ratio valve control module 300 includes the first flue gas condensation submodule, the second flue gas condensation
Module, the first flue gas condenses submodule, for keeping gas ratio valve output power constant；Second flue gas condenses submodule
Block, for tuning up gas ratio valve output power.
When gas ratio valve enters flue gas condensation working condition, it can be to maintain the constant state of its output power,
It is also possible to tune up the state of its output power.I.e. flue gas condensation working condition is not in turn gas ratio valve output work down
The state of rate, avoids turning gas ratio valve output power down and further decreases flue-gas temperature.
It please referring to shown in Fig. 5, the difference of five gas-fired furnace controlling device of the embodiment of the present invention and example IV is,
Combustion gas furnace controller further includes that operation duration obtains module and operation duration judgment module, wherein
Operation duration obtains module, for obtaining the operation duration of gas furnace；
Memory module 200 is also used to store default operation duration；
Operation duration judgment module, for judging whether operation duration is greater than default operation duration；
When length is greater than default operation duration when running, flue-gas temperature obtains module 100 for the first moment flue gas of acquisition
Temperature.
When gas furnace initial launch, flue-gas temperature is lower at this time, if at this time according to the first moment flue-gas temperature obtained
Gas ratio valve is controlled, then may will adjust excessively high in the output power short period of gas ratio valve, causes not conforming to
The adjusted result of reason.When the operation duration of gas furnace is greater than default operation duration, gas furnace enters normal operating conditions at this time, this
When according to obtain the first moment flue-gas temperature gas ratio valve is controlled, flue-gas temperature can either be avoided too low, formed
Aqueous corrosion gas furnace is condensed, also can be avoided unreasonable regulating gas proportioning valve.Optionally, default operation duration can be 2
~4min.
As a kind of optional embodiment, flue-gas temperature obtains module 100, is also used to obtain the second moment flue-gas temperature；
Memory module 200 is also used to store the second preset temperature；
Combustion gas furnace controller further includes second temperature judgment module 220,
Second temperature judgment module 220, for judging whether the second moment flue-gas temperature is lower than the second preset temperature；
When the second moment flue-gas temperature is lower than the second preset temperature, gas ratio valve control module 300 tunes up combustion gas ratio
Example valve output power；
Wherein, the second preset temperature is lower than the first preset temperature.
After control gas ratio valve enters flue gas condensation working condition, i.e., adjusted indirectly by controlling gas ratio valve
After flue-gas temperature, obtain the second moment flue-gas temperature, can timely learning combusted proportion valve enter flue gas condensation working condition
Whether flue-gas temperature afterwards is effectively adjusted.When the second moment flue-gas temperature is lower than the second preset temperature, due to second
Preset temperature is lower than the first preset temperature, then knows that flue-gas temperature is not controlled effectively or adjusts, then further pass through
The output power for tuning up combusted proportion valve carries out the bigger adjusting of control intensity.
Optionally, when the Smoke prevention that gas ratio valve control module 300 is for keeping gas ratio valve output power constant
When the solidifying working condition that is gas-cooled, if the second moment flue-gas temperature is lower than the first preset temperature, illustrate to keep gas ratio valve output
The flue gas condensation working condition of power invariability can not effectively be adjusted flue-gas temperature, then need to further enhance to flue gas
The strength of adjustment of temperature, such as gas ratio valve output power can be tuned up.
When gas ratio valve control module 300 is to condense work shape for tuning up the flue gas of gas ratio valve output power
When state, if the second moment flue-gas temperature is lower than the first preset temperature, illustrate the flue gas for tuning up gas ratio valve output power
Condensation working condition can not effectively be adjusted flue-gas temperature, then need to further enhance the strength of adjustment to flue-gas temperature,
Such as it can further tune up gas ratio valve output power.
Optionally, the second moment flue-gas temperature is obtained, is also possible to obtain period flue-gas temperature belonging to the second moment,
What then the second moment flue-gas temperature referred to is period flue-gas temperature belonging to the second moment.At this point, second temperature judgment module
220, which judge whether the second moment flue-gas temperature is lower than the second preset temperature and can be, judges the second moment affiliated period flue gas temperature
Whether degree is below the second preset temperature.By judging it is default whether the second moment affiliated period flue-gas temperature is below second
Temperature can reduce control frequency, avoid excessively continually regulating gas proportioning valve, cause gas furnace performance unstable.
Optionally, at the time of the second moment can be 1~20s after the first moment.Further, the affiliated time at the second moment
The length of section can be 1~5s.
Optionally, the second preset temperature is lower than 1~3 DEG C of the first preset temperature.Further, the second preset temperature is not less than
Flue gas dew point temperature.
As a kind of optional embodiment, when the second moment flue-gas temperature is not less than the second preset temperature, the first temperature
Judgment module, is also used to judge whether the second moment flue-gas temperature is lower than the first preset temperature.When the second moment flue-gas temperature is low
When the first preset temperature, gas ratio valve control module 300 controls gas ratio valve and enters flue gas condensation working condition.
Further, when the second moment flue-gas temperature is not less than the first preset temperature, gas ratio valve control module 300
Control gas ratio valve exits flue gas condensation working condition.
I.e. when the second moment flue-gas temperature is not less than the second preset temperature, the first temperature comparison module judges second again
Whether moment flue-gas temperature is lower than the first preset temperature.To in the first temperature comparison module, gas ratio valve control module, temperature
Degree obtains module, second temperature comparison module, constitutes circulation between gas ratio valve control module, until flue-gas temperature is not less than
First preset temperature.
As a kind of optional embodiment, flue-gas temperature obtains module 100 and is also used to obtain third moment flue-gas temperature；
Memory module 200 is also used to store third preset temperature, and wherein third preset temperature is optionally greater than the first default temperature
Degree；
Combustion gas furnace controller further includes third temperature judgment module 230；
Third temperature judgment module 230, for judging whether third moment flue-gas temperature is higher than third preset temperature；
When the third moment flue-gas temperature is higher than third preset temperature, the combustion gas processed of gas ratio valve control module 300
Proportioning valve exits flue gas condensation working condition.
Optionally, gas ratio valve can enter ordinary temperature adjusting working condition after exiting flue gas condensation working condition.
For example, ordinary temperature, which adjusts working condition, can be PID (proportional-integral-differential) temp-controled mode.
Optionally, third preset temperature is higher than 1~3 DEG C of the first preset temperature.
It please refers to shown in Fig. 6, the difference of six gas-fired furnace controlling device of the embodiment of the present invention and example IV or embodiment five
It is:
Memory module 200 is also used to store the 4th preset temperature；
Combustion gas furnace controller further includes the 4th temperature judgment module 240,
4th temperature judgment module 240, for judging first when the first moment flue-gas temperature is lower than the first preset temperature
Whether moment flue-gas temperature is lower than the 4th preset temperature；
When the first moment flue-gas temperature is lower than four preset temperatures, gas ratio valve control module 300, for tuning up combustion
Gas proportioning valve output power；
When the first moment is lower than the first preset temperature and the first moment flue-gas temperature is not less than the 4th preset temperature, combustion gas ratio
Example valve control module 300, for keeping gas ratio valve output power constant,
Wherein, the 4th preset temperature is lower than the first preset temperature.
Optionally, the 4th preset temperature is lower than 1~3 DEG C of the first preset temperature, and further, the 4th preset temperature is not less than
Flue gas dew point temperature.
Optionally, the 4th preset temperature may be the same or different with the second preset temperature.
As a kind of optional embodiment, the 4th preset temperature is optionally greater than the second preset temperature.
For example, gas ratio valve control module 300 tunes up combustion when the first moment flue-gas temperature is lower than four preset temperatures
Gas proportioning valve output power adjust flue-gas temperature after, flue-gas temperature obtain module 100 obtain again the second moment flue-gas temperature with
And second temperature judgment module 220 judges whether the second moment flue-gas temperature is lower than the second preset temperature.Due to the second default temperature
Degree is lower than the 4th preset temperature, if the second moment flue-gas temperature is lower than the second preset temperature, illustrates that gas ratio valve controls mould
The logical flue gas proportioning valve output power that tunes up of block 300 could not realize the purpose for adjusting flue-gas temperature, and gas ratio valve is needed to control mould
Block 300 further executes and tunes up gas ratio valve output power.
The present invention also provides a kind of gas furnace, including temperature sensor and combustion gas furnace controller, temperature sensor with
The connection of gas furnace controller communication, combustion gas furnace controller include memory, processor and storage on a memory and can locate
The computer program run on reason device, processor realize gas furnace control method as above when executing program.
Optionally, temperature sensor is arranged at the blower or exhaust fume collecting hood of gas furnace.Combustion gas furnace controller can control this
The flue-gas temperature at place falls on heat exchanger, combustion with corrosive condensing drip so that avoiding flue gas from condensing here generates condensed water
It causes to corrode on the components such as burner, the final service life for influencing combustion furnace.
Optionally, gas furnace includes secondary heat exchanger, and temperature sensor is arranged on secondary heat exchanger.
Hereinafter, gas furnace of the invention is further detailed in conjunction with a kind of above-mentioned control method.
Processor obtains the operation duration of gas furnace and judges whether operation duration is greater than default operation duration.Work as fortune
When row duration is greater than default operation duration, executes and obtain the first moment flue-gas temperature step.It is failed to grow up when running in default fortune
When row duration, operation duration is obtained again, until operation duration is longer than default runing time.
For example, the operation duration obtained is 181s, it is greater than default operation duration 180s.Then processor controls temperature sensor
Row obtains the first moment flue-gas temperature.
For another example, the operation duration of acquisition is 178s, is less than default operation duration 180s.Then processor obtains gas furnace again
When row duration and judging whether operation duration is greater than default operation duration, until operation duration reaches 180s.
Processor controls temperature sensor and obtains the first moment flue-gas temperature, and judges whether the first moment flue-gas temperature is low
In the first preset temperature.If processor judge the first moment flue-gas temperature lower than the first preset temperature, control gas ratio valve into
Enter flue gas condensation working condition.
For example, the first moment flue-gas temperature for getting of the continuous 3s of temperature sensor is 55 DEG C, it is stored in the of memory
One preset temperature is 60 DEG C, then processor judges that 55 DEG C of the first moment flue-gas temperature are lower than 60 DEG C of the first preset temperature.Processor
Control gas ratio valve keeps gas ratio valve output power constant or tunes up gas ratio valve output power.
For another example, the first moment flue-gas temperature that the continuous 3s of temperature sensor is got is 61 DEG C, is stored in the of memory
One preset temperature is 60 DEG C, then processor judges that 61 DEG C of the first moment flue-gas temperature are not less than 60 DEG C of the first preset temperature.Processing
Device controls gas ratio valve and executes ordinary temperature adjusting.
For another example, if the first moment flue-gas temperature that the continuous 3s of temperature sensor is got is 63 DEG C, it is stored in memory
Third preset temperature is 62 DEG C, then when processor judges that the first moment flue-gas temperature is higher than third preset temperature, processor is just controlled
Gas ratio valve processed executes ordinary temperature and adjusts.
Processor control gas ratio valve enters the second moment after flue gas condensation working condition, controls temperature sensor
The second moment flue-gas temperature is obtained, and judges whether the second moment flue-gas temperature is lower than the second preset temperature.If processor judges
Second moment flue-gas temperature is lower than the second preset temperature, and control gas ratio valve enters flue gas condensation working condition.If processing
Device judges that the second moment flue-gas temperature not less than the second preset temperature, judges whether the second moment flue-gas temperature is lower than first again
Preset temperature.
For example, processor control gas ratio valve is kept, gas ratio valve output power is constant or to tune up gas ratio valve defeated
Out after power 1s, the second moment flue-gas temperature that the continuous 3s of temperature sensor is got is 56 DEG C, the second moment flue-gas temperature compared with
First moment flue-gas temperature increases.The second preset temperature for being stored in memory is 57 DEG C, and processor judged for the second moment
Flue-gas temperature is lower than the second preset temperature.Processor control gas ratio valve further tunes up gas ratio valve output power.
For another example, processor control gas ratio valve keeps that gas ratio valve output power is constant or to tune up gas ratio valve defeated
Out after power 1s, the second moment flue-gas temperature that the continuous 3s of temperature sensor is got is 59 DEG C, the second moment flue-gas temperature compared with
First moment flue-gas temperature increases.The second preset temperature for being stored in memory is 57 DEG C, and processor judged for the second moment
Flue-gas temperature is higher than the second preset temperature.Processor judges whether the second moment flue-gas temperature is lower than the first preset temperature again,
Processor judges the second moment flue-gas temperature lower than the first preset temperature, then processor control gas ratio valve keeps gas proportion
Valve output power is constant or tunes up gas ratio valve output power, so recycles.
Processor control gas ratio valve, which enters, tunes up the third moment after gas ratio valve output power, and control temperature passes
Sensor obtains third moment flue-gas temperature, and judges whether third moment flue-gas temperature is higher than third preset temperature.If processor
Judge that third moment flue-gas temperature is higher than third preset temperature, control gas ratio valve exits flue gas condensation working condition.
For example, the third moment flue-gas temperature that gets of the continuous 3s of temperature sensor is 63 DEG C, it is stored in the of memory
Three preset temperatures are 62 DEG C, then processor judges that 63 DEG C of third moment flue-gas temperature are higher than 60 DEG C of third preset temperature, control combustion
Gas proportioning valve exits flue gas condensation working condition, adjusts working condition into ordinary temperature.
In the present description, term " first ", " second " are used for description purposes only, and are not understood to indicate or imply
Relative importance.
The embodiments described above only express several embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously
Limitations on the scope of the patent of the present invention therefore cannot be interpreted as.It should be pointed out that for those of ordinary skill in the art
For, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to guarantor of the invention
Protect range.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.
Claims (13)
1. a kind of gas furnace control method, which is characterized in that the control method the following steps are included:
Obtain the operation duration of the gas furnace；
Judge whether the operation duration is greater than default operation duration；
When the operation duration is greater than the default operation duration, the first moment flue-gas temperature is obtained；When judging described first
Carve whether flue-gas temperature is lower than the first preset temperature；
When the first moment flue-gas temperature is lower than first preset temperature, control gas ratio valve enters flue gas condensation
Working condition；
Obtain the second moment flue-gas temperature；
Judge whether the second moment flue-gas temperature is lower than the second preset temperature；
When the second moment flue-gas temperature is lower than second preset temperature, the gas ratio valve output power is tuned up；
Wherein first preset temperature is higher than flue gas dew point temperature, and second preset temperature is lower than the described first default temperature
Degree.
2. control method according to claim 1, which is characterized in that the control gas ratio valve enters flue gas condensation
The step of working condition includes: to keep the gas ratio valve output power constant and/or tune up the gas ratio valve output
Power.
3. control method according to claim 1, which is characterized in that when the second moment flue-gas temperature is not less than described
When the second preset temperature, judge whether the second moment flue-gas temperature is lower than first preset temperature, when described second
When carving flue-gas temperature lower than first preset temperature, control gas ratio valve enters flue gas condensation working condition.
4. control method according to claim 1, which is characterized in that tune up the gas ratio valve output power described
The step of after, the control method further include:
Obtain third moment flue-gas temperature；
Judge whether third moment flue-gas temperature is higher than third preset temperature, wherein third preset temperature is default optionally greater than first
Temperature；
When third moment flue-gas temperature is higher than third preset temperature, control gas ratio valve exits flue gas condensation work shape
State.
5. according to claim 1 to control method described in 2 any one, which is characterized in that when the first moment flue gas temperature
When degree is lower than first preset temperature, the gas ratio valve for controlling gas furnace enters the step of flue gas condenses working condition packet
Include following sub-step:
When the first moment flue-gas temperature is lower than first preset temperature, whether the first moment flue-gas temperature is judged
Lower than the 4th preset temperature, wherein the 4th preset temperature is lower than first preset temperature；
When the first moment flue-gas temperature is lower than four preset temperature, the gas ratio valve output power is tuned up；
When the first moment flue-gas temperature is not less than four preset temperature, the gas ratio valve output power is kept
It is constant.
6. a kind of gas-fired furnace controlling device, which is characterized in that obtain module (100) and gas furnace control including flue-gas temperature
Device, the flue-gas temperature obtain module (100) and connect with the gas furnace controller communication；
The flue-gas temperature obtains module (100), for obtaining the first moment flue-gas temperature；
The combustion gas furnace controller includes memory module (200), the first temperature judgment module (210) and gas ratio valve control
Module (300), wherein
The memory module (200), for storing the first preset temperature, wherein first preset temperature is higher than flue gas dew point temperature
Degree；
The first temperature judgment module (210), for judging it is pre- whether the first moment flue-gas temperature is lower than described first
If temperature；
The gas ratio valve control module (300), for when the first moment flue-gas temperature is lower than the described first default temperature
When spending, control gas ratio valve enters flue gas condensation working condition；
The combustion gas furnace controller further includes that operation duration obtains module and operation duration judgment module, wherein
The operation duration obtains module, for obtaining the operation duration of the gas furnace；
The memory module (200), is also used to store default operation duration；
The operation duration judgment module, for judging whether the operation duration is greater than the default operation duration；
The flue-gas temperature obtains module, for when the operation duration is greater than the default operation duration, obtaining described the
One moment flue-gas temperature；
The flue-gas temperature obtains module (100), is also used to obtain the second moment flue-gas temperature；
The memory module (200), is also used to store the second preset temperature, wherein second preset temperature is lower than described first
Preset temperature；
The combustion gas furnace controller further includes second temperature judgment module (220)；
The second temperature judgment module (220), for judging it is pre- whether the second moment flue-gas temperature is lower than described second
If temperature；
When the second moment flue-gas temperature is lower than the second preset temperature, the gas ratio valve control module (300) is tuned up
The gas ratio valve output power.
7. control device according to claim 6, which is characterized in that the gas ratio valve control module (300) includes
First flue gas condenses submodule and/or the second flue gas condenses submodule；
First flue gas condenses submodule, for keeping the gas ratio valve output power constant；
Second flue gas condenses submodule, for tuning up the gas ratio valve output power.
8. control device according to claim 6, which is characterized in that
When the second moment flue-gas temperature is not less than second preset temperature, the first temperature judgment module (210),
It is also used to judge whether the second moment temperature is lower than first preset temperature；
The gas ratio valve control module (300) is also used to default lower than described first when the second moment flue-gas temperature
When temperature, control gas ratio valve enters flue gas condensation working condition.
9. control device according to claim 8, which is characterized in that
The flue-gas temperature obtains module (100), is also used to obtain third moment flue-gas temperature；
The memory module (200), is also used to store third preset temperature, wherein the third preset temperature is optionally greater than described
First preset temperature；
The combustion gas furnace controller further includes third temperature judgment module；
The third temperature judgment module, for judging whether the third moment flue-gas temperature is higher than the default temperature of the third
Degree；
When the third moment flue-gas temperature is higher than third preset temperature, gas ratio valve control module (300) control
Gas ratio valve exits flue gas condensation working condition.
10. according to control device described in claim 6 to 7 any one, which is characterized in that
The memory module (200), is also used to store the 4th preset temperature, wherein the 4th preset temperature is lower than described first
Preset temperature；
The combustion gas furnace controller further includes the 4th temperature judgment module (240),
The 4th temperature judgment module (240), for being lower than first preset temperature when the first moment flue-gas temperature
When, judge whether the first moment flue-gas temperature is lower than the 4th preset temperature；
When the first moment flue-gas temperature is lower than four preset temperature, the gas ratio valve control module (300),
For tuning up the gas ratio valve output power；
When first moment is lower than first preset temperature and the first moment flue-gas temperature is pre- not less than the described 4th
If temperature, the gas ratio valve control module (300), for keeping the gas ratio valve output power constant.
11. a kind of gas furnace, which is characterized in that including temperature sensor and combustion gas furnace controller, the temperature sensor with
The gas furnace controller communication connection, the combustion gas furnace controller include memory, processor and store on a memory
And the computer program that can be run on a processor, the processor are realized when executing described program as claim 1 to 5 is any
Control method described in one.
12. gas furnace according to claim 11, which is characterized in that the gas furnace is arranged in the temperature sensor
At blower or exhaust fume collecting hood.
13. gas furnace according to claim 11, which is characterized in that the gas furnace includes secondary heat exchanger, the temperature
Sensor is spent to be arranged on the secondary heat exchanger.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710321564.9A CN107091484B (en) | 2017-05-09 | 2017-05-09 | Gas furnace control method, control device and gas furnace |
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| CN201710321564.9A CN107091484B (en) | 2017-05-09 | 2017-05-09 | Gas furnace control method, control device and gas furnace |
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| CN107091484B true CN107091484B (en) | 2019-11-05 |
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| DE19941700C1 (en) * | 1999-09-02 | 2000-11-30 | Bosch Gmbh Robert | Heating boiler operating device uses detected pressure of exhaust gases within burner flue for detecting potential drop below dew point |
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| CN206036993U (en) * | 2016-08-31 | 2017-03-22 | 湖北国众科技股份有限公司 | A sour dew point temperature detects and controlling means for waste heat of boiler flue gas recovery system |
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2017
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19941700C1 (en) * | 1999-09-02 | 2000-11-30 | Bosch Gmbh Robert | Heating boiler operating device uses detected pressure of exhaust gases within burner flue for detecting potential drop below dew point |
| CN201014767Y (en) * | 2006-07-07 | 2008-01-30 | 海尔集团公司 | Gas heating stove |
| CN201531996U (en) * | 2009-10-22 | 2010-07-21 | 山东爱客多热能科技有限公司 | Gas heating water heater for controlling exhaust gas temperature |
| CN105091345A (en) * | 2014-05-12 | 2015-11-25 | 珠海格力电器股份有限公司 | Method, device and water heater for detecting running state of compressor |
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