CN112146123A - Self-adaptive control method and device for premixed combustion and gas equipment - Google Patents
Self-adaptive control method and device for premixed combustion and gas equipment Download PDFInfo
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- CN112146123A CN112146123A CN202011040847.4A CN202011040847A CN112146123A CN 112146123 A CN112146123 A CN 112146123A CN 202011040847 A CN202011040847 A CN 202011040847A CN 112146123 A CN112146123 A CN 112146123A
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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
- F23N5/20—Systems for controlling combustion with a time programme acting through electrical means, e.g. using time-delay relays
- F23N5/203—Systems for controlling combustion with a time programme acting through electrical means, e.g. using time-delay relays using electronic means
Abstract
The invention discloses a self-adaptive control method and device for premixed combustion and gas equipment, wherein the self-adaptive control method for premixed combustion comprises the following steps: determining a target air-fuel ratio corresponding to a second fuel gas phase when the premixed combustion raw material is changed from the first fuel gas to the second fuel gas; when the second gas is adopted for premixed combustion, acquiring current state parameters for representing the combustion state of the second gas, and determining the current air-fuel ratio according to the current state parameters; and when the current air-fuel ratio does not meet the target air-fuel ratio, adjusting the gas intake and/or the air intake. By implementing the invention, the gas equipment can adjust the air-fuel ratio according to different types of gas, the optimal combustion state of the gas is ensured, and the potential safety hazard caused by abnormal combustion due to the uncomfortable air-fuel ratio is avoided.
Description
Technical Field
The invention relates to the technical field of wall-mounted furnaces, in particular to a self-adaptive control method and device for premixed combustion and gas equipment.
Background
In the design and development of the full-premixing condensing type gas wall-mounted furnace, a designer adjusts the rotating speed of the variable frequency fan and the zero position of the gas proportional valve, so that the content of oxygen or carbon dioxide in smoke is a preset value when a product is combusted at rated power and minimum power, thereby determining the good air-fuel ratio and enabling the combustion working condition to be in the best state. Therefore, the fully premixed condensing type gas wall-mounted furnace usually used by the user is only suitable for the gas type set before the factory, and the air-fuel ratio of the fully premixed condensing type gas wall-mounted furnace is preset, so that the user cannot automatically adjust the gas type. If the gas composition changes, the calorific value, density, combustion characteristics and the like of the gas exceed the design range, the most reasonable air-fuel ratio corresponding to the full-premixing condensing type gas wall-mounted boiler also changes, so that the current air-fuel ratio of the full-premixing condensing type gas wall-mounted boiler is different from the most reasonable air-fuel ratio, and the wall-mounted boiler cannot reach the optimal combustion working condition, even has abnormity, such as reduced thermal efficiency, high ignition noise, high combustion noise, increased carbon monoxide emission and the like.
Disclosure of Invention
Therefore, the invention aims to overcome the defect that the air-fuel ratio of the full-premixing condensing type gas wall-hanging furnace in the prior art cannot be adjusted in a self-adaptive manner, so that the combustion condition is poor, and provides a self-adaptive control method and device for premixing combustion and gas equipment.
According to a first aspect, an embodiment of the present invention provides an adaptive control method for premixed combustion, including: determining a target air-fuel ratio corresponding to a second fuel gas phase when the premixed combustion raw material is changed from the first fuel gas to the second fuel gas; when the second gas is adopted for premixed combustion, acquiring a current state parameter for representing the combustion state of the second gas, and determining the current air-fuel ratio according to the current state parameter; and when the current air-fuel ratio does not meet the target air-fuel ratio, adjusting the gas intake and/or the air intake.
With reference to the first aspect, in a first embodiment of the first aspect, the adjusting of the gas intake amount and/or the air intake amount when the current air-fuel ratio is different from the target air-fuel ratio includes: when the current air-fuel ratio is smaller than the target air-fuel ratio, increasing the gas intake and/or reducing the air intake; when the current air-fuel ratio is larger than the target air-fuel ratio, the air intake is increased and/or the gas intake is decreased.
With reference to the first aspect, in a second embodiment of the first aspect, when the gas inlet amount and/or the air inlet amount are/is adjusted by adjusting an operating parameter of a gas proportional valve and/or a fan, the method further includes: and when the current air-fuel ratio accords with the target air-fuel ratio, storing the working parameters of the gas proportional valve and/or the fan.
With reference to the first aspect or the first embodiment of the first aspect or the second embodiment of the first aspect, in a third embodiment of the first aspect, the current state parameters for characterizing the combustion state of the second gas comprise one or both of: an ion current signal, a carbon dioxide content produced by combustion of the second gas.
With reference to the third embodiment of the first aspect, in a fourth embodiment of the first aspect, when the current state parameter for characterizing the combustion state of the second gas is a carbon dioxide content generated by combustion of the second gas, before acquiring the current state parameter for characterizing the combustion state of the second gas, the method further includes: acquiring an initial ion current value of the second gas during combustion; judging whether the initial ion current value is higher than a preset threshold value or not; and when the initial ion current value is higher than the preset threshold value, acquiring a current state parameter for representing the combustion state of the second gas.
With reference to the fourth embodiment of the first aspect, in a fifth embodiment of the first aspect, the adaptive control method for premixed combustion further includes: and when the initial ion current value is lower than or equal to the preset threshold value, controlling the gas proportional valve to be closed.
With reference to the first aspect, in a sixth embodiment of the first aspect, the determining a target air-fuel ratio corresponding to the second fuel gas phase includes: acquiring corresponding relations between different types of fuel gas and target air-fuel ratios; when the premixed combustion raw material is changed from a first fuel gas to a second fuel gas, a target air-fuel ratio corresponding to the second fuel gas is determined by using the correspondence between the different kinds of fuel gases and the target air-fuel ratio.
With reference to the sixth embodiment of the first aspect, in the seventh embodiment of the first aspect, the method for determining the target air-fuel ratio of each gas includes: acquiring a plurality of ion current sampling values corresponding to the fuel gas; and determining the maximum value of the sampling value of the ion current, and taking the air-fuel ratio corresponding to the maximum value as the target air-fuel ratio of the gas.
With reference to the sixth embodiment of the first aspect, in the eighth embodiment of the first aspect, the method for determining the target air-fuel ratio of each of the gases further includes: obtaining a plurality of ion current sampling values corresponding to the gas, and converting the ion current sampling values into a plurality of voltage values; and determining the maximum value of the voltage values, and taking the air-fuel ratio corresponding to the maximum value of the voltage values as the target air-fuel ratio of the gas.
According to a second aspect, an embodiment of the present invention provides an adaptive control apparatus for premixed combustion, including: the fuel gas pre-mixing device comprises a determining module, a control module and a control module, wherein the determining module is used for determining a target air-fuel ratio corresponding to a second fuel gas phase when a pre-mixed combustion raw material is changed from a first fuel gas to the second fuel gas; the acquisition module is used for acquiring current state parameters for representing the combustion state of the second fuel gas when the second fuel gas is adopted for premixed combustion, and determining the current air-fuel ratio according to the current state parameters; and the adjusting module is used for adjusting the gas intake and/or the air intake when the current air-fuel ratio does not accord with the target air-fuel ratio.
According to a third aspect, an embodiment of the present invention provides a gas appliance, including: a memory and a processor, wherein the memory and the processor are communicatively connected with each other, the memory stores computer instructions, and the processor executes the computer instructions to execute the adaptive control method for premixed combustion according to the first aspect or any embodiment of the first aspect.
According to a fourth aspect, an embodiment of the present invention provides a computer-readable storage medium storing computer instructions for causing a computer to execute the adaptive control method for premixed combustion of the first aspect or any of the embodiments of the first aspect.
The technical scheme of the invention has the following advantages:
according to the self-adaptive control method and device for premixed combustion and the gas equipment, when premixed combustion raw materials are changed from first gas to second gas, the target air-fuel ratio corresponding to the second gas is determined, when the second gas is adopted for premixed combustion, current state parameters used for representing the combustion state of the second gas are obtained, the current air-fuel ratio is determined according to the current state parameters, and when the current air-fuel ratio does not accord with the target air-fuel ratio, the gas intake and/or the air intake are/is adjusted, so that the gas equipment can adjust the air-fuel ratio according to different types of gas, the optimal combustion state of the gas is ensured, and potential safety hazards caused by abnormal combustion due to improper air-fuel ratio are avoided.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a flow chart of an adaptive control method of fuel gas in an embodiment of the present invention;
FIG. 2 is another flow chart of an adaptive control method of fuel gas in an embodiment of the present invention;
FIG. 3 is another flow chart of an adaptive control method of fuel gas in an embodiment of the present invention;
FIG. 4 is a schematic block diagram of an adaptive control system for fuel gas in an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a gas appliance in an embodiment of the present invention.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "first", "second", and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Furthermore, unless expressly stated or limited otherwise, the terms "connected" and "connected" are intended to be inclusive and mean, for example, that they may be fixedly, removably, or integrally connected; can be mechanically or electrically connected; the two elements may be directly connected or indirectly connected through an intermediate medium, or may be communicated with each other inside the two elements, or may be wirelessly connected or wired connected. The specific meaning of the above terms in the present invention can be understood in specific cases to those of ordinary skill in the art.
In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
Example 1
The embodiment provides an adaptive control method for premixed combustion, which is applied to gas settings used by users, for example, a full-premixed condensing wall-mounted gas furnace (full-premixed wall-mounted gas furnace for short), so as to avoid the problem that the full-premixed wall-mounted gas furnace cannot reach the optimal combustion condition due to the fact that the current air-fuel ratio is different from the most reasonable air-fuel ratio corresponding to the current type of gas when the type of gas is changed, as shown in fig. 1, the adaptive control method for premixed combustion includes the following steps:
and S11, when the premixed combustion raw material is changed from the first fuel gas to the second fuel gas, determining a target air-fuel ratio corresponding to the second fuel gas.
Illustratively, the target air-fuel ratio is a ratio between an amount of air and an amount of gas corresponding to when the gas is in an optimum combustion state. The first fuel gas is the historical use fuel gas of the full-premixing wall-hanging stove, and the second fuel gas is the current use fuel gas of the full-premixing wall-hanging stove. Usually, the type of gas is different from the corresponding air-fuel ratio, and the optimal combustion condition can be realized only when the type of gas is combusted at the corresponding air-fuel ratio. However, when the premixed combustion raw material is changed from the first gas to the second gas, the air-fuel ratio corresponding to the changed second gas may be different from the air-fuel ratio corresponding to the first gas, and then the mixed combustion is performed according to the air-fuel ratio of the first gas, which may cause combustion abnormality. Therefore, when the premixed raw material is changed from the first fuel gas to the second fuel gas, in order to ensure that the fuel gas can reach the optimal combustion condition, the target air-fuel ratio corresponding to the second fuel gas needs to be determined.
S12, when the second fuel gas is adopted for premixed combustion, the current state parameter used for representing the combustion state of the second fuel gas is obtained, and the current air-fuel ratio is determined according to the current state parameter.
Illustratively, the current air-fuel ratio is a ratio between the current gas amount and the air amount in the fully premixed wall-hanging stove. And when the fully-premixed wall-mounted boiler adopts the second gas for premixed combustion, acquiring current state parameters for representing the combustion state of the second gas to determine the combustion state of the second gas. And determining the current air-fuel ratio of the fully premixed wall hanging furnace according to the acquired current state parameter for representing the combustion state of the second gas.
And S13, when the current air-fuel ratio does not meet the target air-fuel ratio, adjusting the gas intake and/or the air intake.
For example, the current air-fuel ratio is compared with the target air-fuel ratio, and whether the current air-fuel ratio meets the target air-fuel ratio is determined. If the current air-fuel ratio does not meet the target air-fuel ratio, it indicates that the second fuel gas is not in the optimal combustion condition, and at this time, the air intake and/or the air intake are/is required to be adjusted to achieve the effect that the current air-fuel ratio is the same as the target air-fuel ratio, so as to ensure that the second fuel gas can be in the optimal combustion condition.
According to the self-adaptive control method for premixed combustion provided by the embodiment, when the premixed combustion raw material is changed from the first gas to the second gas, the target air-fuel ratio corresponding to the second gas is determined, when the second gas is adopted for premixed combustion, the current state parameter for representing the combustion state of the second gas is obtained, the current air-fuel ratio is determined according to the current state parameter, and when the current air-fuel ratio does not accord with the target air-fuel ratio, the gas intake and/or the air intake are/is adjusted, so that the gas equipment can adjust the air-fuel ratio according to different types of gas, the optimal combustion state of the gas is ensured, and potential safety hazards caused by abnormal combustion due to the fact that the air-fuel ratio is not suitable are avoided.
As an alternative implementation, as shown in fig. 2, the step S13 includes:
s131, when the current air-fuel ratio is larger than the target air-fuel ratio, the gas intake is increased and/or the air intake is decreased.
For example, when the current air-fuel ratio in the fully premixed wall hanging stove is greater than the target air-fuel ratio, it means that the current air-fuel ratio will cause the excess air to carry away the heat of the gas combustion, and further cause the flame temperature to decrease, thereby decreasing the thermal efficiency of the gas combustion, and at this time, it is necessary to decrease the air intake or increase the gas intake to ensure that the current air-fuel ratio approaches the target air-fuel ratio.
S132, when the current air-fuel ratio is smaller than the target air-fuel ratio, the air intake is increased and/or the gas intake is decreased.
For example, when the current air-fuel ratio in the fully premixed wall hanging stove is smaller than the target air-fuel ratio, it means that the current air-fuel ratio may cause insufficient gas combustion and may also cause a decrease in flame temperature, thereby decreasing the thermal efficiency of gas combustion.
Optionally, when the gas inlet amount and/or the air inlet amount are/is adjusted by adjusting the working parameters of the gas proportional valve and/or the fan, the adaptive control of the premixed combustion further comprises: and when the current air-fuel ratio accords with the target air-fuel ratio, storing the working parameters of the gas proportional valve and/or the fan.
Illustratively, if the current air-fuel ratio meets the target air-fuel ratio, it indicates that the second fuel gas is currently in an optimal combustion state, and no adjustments to the intake air amount and/or the intake air amount are needed. At the moment, the fully-premixed wall-mounted boiler can store the current working parameters of the gas proportional valve and/or the fan, when the second fuel gas of the gas is used next time, the working parameters of the gas proportional valve and/or the fan corresponding to the second fuel gas can be directly called, the gas intake and/or the air intake do not need to be adjusted again, the adjusting time is saved, and the working efficiency of the wall-mounted boiler is improved.
According to the self-adaptive control method for premixed combustion provided by the embodiment, when the current air-fuel ratio does not accord with the target air-fuel ratio, the current air-fuel ratio is ensured to be close to the target air-fuel ratio by adjusting the gas intake and/or the air intake, so that the gas is ensured to be in the optimal combustion state, and the problem that the wall-mounted furnace has potential safety hazards in use due to abnormal combustion caused by the improper air-fuel ratio of the gas is avoided; when the current air-fuel ratio accords with the target air-fuel ratio, the working parameters of the gas proportional valve and/or the fan are saved, the adjusting time is saved, and the working efficiency of the wall-mounted furnace is improved.
As an alternative embodiment, the current state parameters for characterizing the combustion state of the second gas comprise one or both of: an ion current signal, a carbon dioxide content produced by combustion of the second gas.
Illustratively, when the parameters for characterizing the combustion state are the ion current signal and the content of carbon dioxide generated by the combustion of the gas, a carbon dioxide content detector is adopted to monitor the content of carbon dioxide generated by the combustion of the gas in real time. When the carbon dioxide content deviates from the set value, the intake of gas and/or the intake of air is adjusted so that the carbon dioxide content resulting from the combustion of the gas is within a floating range of the set value, which may typically be 9% and may be 1%.
When the parameter for representing the combustion state is the ion current signal, the ion current detector can be adopted to obtain the ion current signal in the gas combustion process, and whether the gas combustion is normal or not is judged through the ion current signal. When the gas is burnt normally, the current burning state of the gas can be determined through the ion current signal. Specifically, the ion current signal generated when the gas is combusted is related to the concentration of ions, and the larger the ion concentration is, the larger the generated ion current signal is; the smaller the ion concentration, the smaller the ion current signal generated. Meanwhile, the ion concentration is related to the flame temperature, the higher the flame temperature is, the larger the generated activation energy is, the more the number of gas atoms are activated is, the more ions are generated, the larger the ion concentration is, namely, the ion current signal can reflect the flame temperature of gas combustion, and as the corresponding air-fuel ratio is the target air-fuel ratio when the flame temperature is the maximum, the current air-fuel ratio can be reflected through the ion current signal, and then the gas intake and/or the air intake can be adjusted according to the ion current signal.
As an alternative embodiment, when the current state parameter for characterizing the combustion state of the second fuel gas is the content of carbon dioxide generated by the combustion of the second fuel gas, before the step S12, the method further includes:
first, an initial ion current value corresponding to the second gas combustion is acquired.
Illustratively, the initial ion current value is an ion current value corresponding to the second gas when the second gas is ignited. When the gas type is changed from the first gas to the second gas, the initial ionic current value of the second gas is obtained through the ionic current detector.
Secondly, whether the initial ion current value is higher than a preset threshold value is judged.
Illustratively, the preset threshold is an ion current value corresponding to a minimum flame. And comparing the initial ion current value with a preset threshold value, determining the relation between the initial ion current value and the preset threshold value, and further determining whether the initial ion current value is higher than the preset threshold value.
And thirdly, when the initial ion current value is higher than the preset threshold value, acquiring the current state parameter for representing the combustion state of the second gas.
For example, if the initial ion current value is compared with the preset threshold value, when it is determined that the initial ion current value is higher than the preset threshold value, it indicates that the current combustion of the second gas is in a normal state, and at this time, the current state parameter representing the combustion state of the second gas may be obtained.
As an alternative embodiment, when the current state parameter for characterizing the combustion state of the second fuel gas is the content of carbon dioxide generated by the combustion of the second fuel gas, before step S12, the method further includes: and if the initial ion current value is lower than or equal to the preset threshold value, controlling the gas proportional valve to be closed.
Illustratively, if the initial ion current value is compared with the preset threshold value, when the initial ion current value is determined to be lower than or equal to the preset threshold value, it is determined that no flame signal exists currently or the current gas combustion is in an abnormal state, and at this time, the control gas proportional valve needs to be closed in time to cut off the gas source, so that the safety of a user is ensured.
As an alternative implementation, as shown in fig. 3, the step S11 includes:
and S111, acquiring the corresponding relation between different types of fuel gas and the target air-fuel ratio.
For example, different types of gas correspond to different target air-fuel ratios, and a correspondence relationship between the different types of gas and the different target air-fuel ratios is generated. Wherein, the target air-fuel ratio corresponding to each kind of gas can be determined by collecting the optimal ion current signal under each combustion heat load.
And S112, when the premixed combustion raw material is changed from the first fuel gas to the second fuel gas, determining a target air-fuel ratio corresponding to the second fuel gas by using the corresponding relation between the different types of fuel gases and the target air-fuel ratio.
Illustratively, the second gas, such as artificial gas, natural gas, liquefied petroleum gas, etc., introduced into the fully premixed wall-hanging stove is identified after it is determined that the gas introduced into the fully premixed wall-hanging stove has been changed from the first gas to the second gas. And after the type of the second gas introduced into the fully premixed wall hanging furnace is determined, determining a target air-fuel ratio corresponding to the second gas according to the corresponding relation between different types of gas and different target air-fuel ratios.
As an alternative embodiment, the method for determining the target air-fuel ratio of each gas may include the following steps:
(1) and acquiring a plurality of ion current sampling values corresponding to the fuel gas.
Illustratively, when the gas and air are sufficiently combusted, their corresponding ion current sampled values are maximized. The ion current detector can be used for acquiring a plurality of ion current sampling values of each gas in the combustion process in real time, and sequencing the plurality of ion current sampling values acquired in the combustion process of each gas.
(2) And determining the maximum value of the sampling value of the ion current, and taking the air-fuel ratio corresponding to the maximum value as the target air-fuel ratio of the fuel gas.
For example, the largest ion current sampling value is determined according to the sequencing result of the plurality of ion current sampling values, the largest ion current sampling value is selected from the ion current sampling values, and the air-fuel ratio corresponding to the largest ion current sampling value is used as the target air-fuel ratio corresponding to the current type of gas.
As an alternative embodiment, the step of determining the target air-fuel ratio may further include:
(1) and acquiring a plurality of ion current sampling values corresponding to the gas, and converting the plurality of ion current sampling values into a plurality of voltage values.
For example, a flame detection circuit may be disposed in the fully premixed wall hanging furnace, and an ion current signal obtained by the ion current detector is converted into a voltage signal by the flame detection circuit, that is, a plurality of ion current sampling values obtained by real-time detection may obtain a plurality of voltage values corresponding thereto.
(2) The maximum value of the voltage values is determined, and the air-fuel ratio corresponding to the maximum value of the voltage values is used as the target air-fuel ratio of the gas.
For example, the larger the ion current sampling value is, the larger the voltage value obtained after the conversion is, that is, the maximum value of the ion current sampling value corresponds to the maximum voltage value, and the air-fuel ratio corresponding to the maximum voltage value is taken as the target air-fuel ratio corresponding to the current type of gas.
According to the self-adaptive control method for premixed combustion, the corresponding relation between different types of gas and the target air-fuel ratio is obtained, and the target air-fuel ratio corresponding to the current type of gas is determined according to the corresponding relation, so that the gas equipment can adjust the air-fuel ratio according to different types of gas, and the optimal combustion state of the gas is ensured.
Example 2
The embodiment provides a self-adaptive control device for premixed combustion, which is applied to gas settings used by users, for example, a full-premixing condensing type wall-mounted gas furnace (full-premixing wall-mounted gas furnace for short) to avoid the problem that the full-premixing wall-mounted gas furnace cannot reach the optimal combustion condition due to the fact that the current air-fuel ratio is different from the most reasonable air-fuel ratio corresponding to the current type of gas when the type of gas is changed, as shown in fig. 4, the self-adaptive control device for premixed combustion comprises the following steps:
the determination module 21 is used for determining a target air-fuel ratio corresponding to the second fuel gas phase when the raw materials of the premixed combustion are changed from the first fuel gas to the second fuel gas. For a detailed description, refer to the related description of step S11 corresponding to the above embodiment, and the detailed description is omitted here.
And the obtaining module 22 is configured to obtain a current state parameter for representing a combustion state of the second fuel gas when premixed combustion is performed using the second fuel gas, and determine a current air-fuel ratio according to the current state parameter. For a detailed description, refer to the related description of step S12 corresponding to the above embodiment, and the detailed description is omitted here.
And the adjusting module 23 is configured to adjust the gas intake and/or the air intake when the current air-fuel ratio does not meet the target air-fuel ratio. For a detailed description, refer to the related description of step S13 corresponding to the above embodiment, and the detailed description is omitted here.
The adaptive control device for premixed combustion provided by this embodiment determines a target air-fuel ratio corresponding to a second gas phase when a premixed-combusted raw material is changed from a first gas to the second gas, acquires a current state parameter for representing a combustion state of the second gas when the second gas is used for premixed combustion, determines the current air-fuel ratio according to the current state parameter, and adjusts a gas intake and/or an air intake when the current air-fuel ratio does not meet the target air-fuel ratio, thereby realizing that a gas device can adjust the air-fuel ratio according to different types of gases, ensuring an optimal combustion state of the gases, and avoiding potential safety hazards caused by abnormal combustion due to improper air-fuel ratio.
As an optional implementation, the adjusting module 23 includes:
and the first adjusting submodule is used for increasing the gas intake and/or reducing the air intake when the current air-fuel ratio is smaller than the target air-fuel ratio. For a detailed description, refer to the related description of step S131 corresponding to the above embodiment, which is not repeated herein.
And the second adjusting submodule is used for increasing the air intake and/or reducing the gas intake when the current air-fuel ratio is larger than the target air-fuel ratio. For a detailed description, refer to the related description of step S132 corresponding to the above embodiment, which is not repeated herein.
As an optional embodiment, the adaptive control apparatus for premixed combustion further comprises:
and the storage module is used for storing the working parameters of the gas proportional valve and/or the fan when the current air-fuel ratio accords with the target air-fuel ratio. For detailed description, refer to the related description of the above embodiments, and are not repeated herein.
According to the self-adaptive control device for premixed combustion, when the current air-fuel ratio is not accordant with the target air-fuel ratio, the current air-fuel ratio is ensured to be close to the target air-fuel ratio by adjusting the gas intake and/or the air intake, so that the gas is ensured to be in the optimal combustion state, and the problem that the wall-mounted furnace has potential safety hazards in use due to abnormal combustion caused by the fact that the air-fuel ratio of the gas is not appropriate is solved; when the current air-fuel ratio accords with the target air-fuel ratio, the working parameters of the gas proportional valve and/or the fan are saved, when the second fuel gas of the gas type is used next time, the working parameters of the gas proportional valve and/or the fan corresponding to the second fuel gas can be directly called, the gas intake and/or the air intake do not need to be adjusted again, the adjusting time is saved, and the working efficiency of the wall-mounted furnace is improved.
As an alternative embodiment, the current state parameters for characterizing the combustion state of the second gas comprise one or both of: an ion current signal, a carbon dioxide content produced by combustion of the second gas.
As an optional embodiment, the adaptive control apparatus for premixed combustion further comprises:
and the first acquisition submodule is used for acquiring the initial ion current value when the second gas is combusted. For detailed description, refer to the related description of the above embodiments, and are not repeated herein.
And the second judgment submodule is used for judging whether the initial ion current value is higher than a preset threshold value or not. For detailed description, refer to the related description of the above embodiments, and are not repeated herein.
And the second obtaining submodule is used for obtaining the current state parameter for representing the combustion state of the second gas when the initial ion current value is higher than the preset threshold value. For detailed description, refer to the related description of the above embodiments, and are not repeated herein.
And the third acquisition submodule is used for controlling the gas proportional valve to be closed when the initial ion current value is lower than or equal to the preset threshold value. For detailed description, refer to the related description of the above embodiments, and are not repeated herein.
As an optional implementation manner, the determining module 21 includes:
and the fourth acquisition submodule is used for acquiring the corresponding relation between different types of fuel gas and the target air-fuel ratio. For a detailed description, refer to the related description of step S111 corresponding to the above embodiment, which is not repeated herein.
And the identification submodule is used for determining a target air-fuel ratio corresponding to the second fuel gas by utilizing the corresponding relation between different types of fuel gas and the target air-fuel ratio when the premixed and combusted raw materials are changed from the first fuel gas to the second fuel gas. For a detailed description, refer to the related description of step S112 corresponding to the above embodiment, which is not repeated herein.
As an optional embodiment, the adaptive control apparatus for premixed combustion further comprises:
and the current acquisition module is used for acquiring a plurality of ion current sampling values corresponding to the fuel gas. For detailed description, refer to the related description of the above embodiments, and are not repeated herein.
And the third determining module is used for determining the maximum value of the ion current sampling value and taking the air-fuel ratio corresponding to the maximum value as the target air-fuel ratio of the fuel gas. For detailed description, refer to the related description of the above embodiments, and are not repeated herein.
As an optional embodiment, the adaptive control apparatus for premixed combustion further includes:
and the conversion module is used for acquiring a plurality of ion current sampling values corresponding to the fuel gas and converting the plurality of ion current sampling values into a plurality of voltage values. For detailed description, refer to the related description of the above embodiments, and are not repeated herein.
And the fourth determination module is used for determining the maximum value of the voltage values and taking the air-fuel ratio corresponding to the maximum value of the voltage values as the target air-fuel ratio of the gas. For detailed description, refer to the related description of the above embodiments, and are not repeated herein.
The adaptive control device for premixed combustion provided by this embodiment determines the target air-fuel ratio corresponding to the type of the current gas according to the corresponding relationship by obtaining the corresponding relationship between different types of gas and the target air-fuel ratio, so that the gas equipment can adjust the air-fuel ratio according to different types of gas, and the optimal combustion state of the gas is ensured.
Example 3
The present embodiment provides a gas appliance, as shown in fig. 5, the gas appliance includes a processor 31 and a memory 32, wherein the processor 31 and the memory 32 may be connected by a bus or by other means, and fig. 5 illustrates the connection by the bus as an example.
The processor 31 may be a Central Processing Unit (CPU). The Processor 31 may also be other general-purpose processors, Digital Signal Processors (DSPs), Graphics Processing Units (GPUs), embedded Neural Network Processors (NPUs), or other dedicated deep learning coprocessors, Application Specific Integrated Circuits (ASICs), Field Programmable Gate Arrays (FPGAs), or other Programmable logic devices, discrete Gate or transistor logic devices, discrete hardware components, or any combination thereof.
The memory 32, which is a non-transitory computer readable storage medium, may be used to store non-transitory software programs, non-transitory computer executable programs, and modules, such as program instructions/modules (e.g., the determining module 21, the obtaining module 22, and the adjusting module 23 shown in fig. 4) corresponding to the adaptive control method of premixed combustion in the embodiment of the present invention. The processor 31 executes various functional applications and data processing of the processor by running non-transitory software programs, instructions and modules stored in the memory 32, namely, implements the adaptive control method of the premixed combustion in the above method embodiment.
The memory 32 may include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function; the storage data area may store data created by the processor 31, and the like. Further, the memory 32 may include high speed random access memory, and may also include non-transitory memory, such as at least one magnetic disk storage device, flash memory device, or other non-transitory solid state storage device. In some embodiments, the memory 32 may optionally include memory located remotely from the processor 31, and these remote memories may be connected to the processor 31 via a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
The one or more modules are stored in the memory 32 and, when executed by the processor 31, perform an adaptive control method of premixed combustion as in the embodiment of fig. 1-3.
When the premixed combustion raw material is changed from first gas to second gas, a target air-fuel ratio corresponding to the second gas is determined, when the second gas is adopted for premixed combustion, current state parameters for representing the combustion state of the second gas are obtained, the current air-fuel ratio is determined according to the current state parameters, and when the current air-fuel ratio does not accord with the target air-fuel ratio, the gas intake and/or the air intake are/is adjusted, so that the gas equipment can adjust the air-fuel ratio according to different types of gas, the optimal combustion state of the gas is ensured, and the potential safety hazard caused by abnormal combustion due to the fact that the air-fuel ratio is not appropriate is avoided.
The details of the gas appliance can be understood by referring to the corresponding descriptions and effects of the embodiment shown in fig. 1 to 5, and are not described herein again. For details of the technology that are not described in detail in this embodiment, reference may be made to the related description in the embodiments shown in fig. 1 to 5.
Embodiments of the present invention further provide a non-transitory computer storage medium, where the computer storage medium stores computer-executable instructions, and the computer-executable instructions may execute the adaptive control method for premixed combustion in any of the above method embodiments. The storage medium may be a magnetic Disk, an optical Disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a Flash Memory (Flash Memory), a Hard Disk (Hard Disk Drive, abbreviated as HDD), a Solid State Drive (SSD), or the like; the storage medium may also comprise a combination of memories of the kind described above.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.
Claims (12)
1. An adaptive control method for premixed combustion, comprising:
determining a target air-fuel ratio corresponding to a second fuel gas phase when the premixed combustion raw material is changed from the first fuel gas to the second fuel gas;
when the second gas is adopted for premixed combustion, acquiring a current state parameter for representing the combustion state of the second gas, and determining the current air-fuel ratio according to the current state parameter;
and when the current air-fuel ratio does not meet the target air-fuel ratio, adjusting the gas intake and/or the air intake.
2. The method of claim 1, wherein adjusting the gas and/or air intake when the current air-fuel ratio is different from the target air-fuel ratio comprises:
when the current air-fuel ratio is smaller than the target air-fuel ratio, increasing the gas intake and/or reducing the air intake;
when the current air-fuel ratio is larger than the target air-fuel ratio, the air intake is increased and/or the gas intake is decreased.
3. The method of claim 1, when adjusting the gas inlet and/or the air inlet by adjusting an operating parameter of a gas proportional valve and/or a fan, further comprising:
and when the current air-fuel ratio accords with the target air-fuel ratio, storing the working parameters of the gas proportional valve and/or the fan.
4. A method according to any one of claims 1 to 3, wherein the current state parameters for characterising the combustion state of the second gas include one or both of: an ion current signal, a carbon dioxide content produced by combustion of the second gas.
5. The method of claim 4, wherein when the current state parameter indicative of the second gas combustion state is a carbon dioxide content produced by combustion of the second gas, prior to obtaining the current state parameter indicative of the second gas combustion state, further comprising:
acquiring an initial ion current value of the second gas during combustion;
judging whether the initial ion current value is higher than a preset threshold value or not;
and when the initial ion current value is higher than the preset threshold value, acquiring a current state parameter for representing the combustion state of the second gas.
6. The method of claim 5, further comprising:
and when the initial ion current value is lower than or equal to the preset threshold value, controlling the gas proportional valve to be closed.
7. The method of claim 1, wherein the determining a target air-fuel ratio corresponding to the second fuel gas phase comprises:
acquiring corresponding relations between different types of fuel gas and target air-fuel ratios;
when the premixed combustion raw material is changed from a first fuel gas to a second fuel gas, a target air-fuel ratio corresponding to the second fuel gas is determined by using the correspondence between the different kinds of fuel gases and the target air-fuel ratio.
8. The method according to claim 7, wherein the method of determining the target air-fuel ratio of each gas comprises:
acquiring a plurality of ion current sampling values corresponding to the fuel gas;
and determining the maximum value of the sampling value of the ion current, and taking the air-fuel ratio corresponding to the maximum value as the target air-fuel ratio of the gas.
9. The method of claim 7, wherein the method of determining the target air-fuel ratio for each gas further comprises:
obtaining a plurality of ion current sampling values corresponding to the gas, and converting the ion current sampling values into a plurality of voltage values;
and determining the maximum value of the voltage values, and taking the air-fuel ratio corresponding to the maximum value of the voltage values as the target air-fuel ratio of the gas.
10. An adaptive control apparatus for premixed combustion, comprising:
the fuel gas pre-mixing device comprises a determining module, a control module and a control module, wherein the determining module is used for determining a target air-fuel ratio corresponding to a second fuel gas phase when a pre-mixed combustion raw material is changed from a first fuel gas to the second fuel gas;
the acquisition module is used for acquiring current state parameters for representing the combustion state of the second fuel gas when the second fuel gas is adopted for premixed combustion, and determining the current air-fuel ratio according to the current state parameters;
and the adjusting module is used for adjusting the gas intake and/or the air intake when the current air-fuel ratio does not accord with the target air-fuel ratio.
11. A gas-fired appliance, comprising: a memory and a processor, the memory and the processor being communicatively connected to each other, the memory having stored therein computer instructions, the processor executing the computer instructions to perform the adaptive control method of premixed combustion according to any one of claims 1 to 9.
12. A computer-readable storage medium storing computer instructions for causing a computer to execute the adaptive control method of premixed combustion of any one of claims 1 to 9.
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