CN117847801A

CN117847801A - Control method and device for fuel gas proportional valve

Info

Publication number: CN117847801A
Application number: CN202311794017.4A
Authority: CN
Inventors: 姚展辉; 陈力威; 张强; 潘叶江
Original assignee: Vatti Co Ltd
Current assignee: Vatti Co Ltd
Priority date: 2023-12-22
Filing date: 2023-12-22
Publication date: 2024-04-09

Abstract

The invention belongs to the field of wall-mounted furnaces, and discloses a control method and device for a fuel gas proportional valve. The method comprises the following steps: after receiving a gas proportional valve regulating instruction, controlling the gas proportional valve to be opened according to a first opening value stored in advance; after ignition is successful, controlling the fan to run according to the prestored first power; increasing the proportional valve opening of the fuel gas proportional valve according to a preset opening adjustment interval and an opening adjustment threshold value, acquiring flame ion current, determining actual measurement curves of the proportional valve opening and the flame ion current, and stopping increasing the proportional valve opening of the fuel gas proportional valve until the flame ion current is in a decreasing trend; and determining the current target proportional valve opening and the corresponding target flame ion current according to the actual measurement curve and a plurality of curves stored in advance, and controlling the fuel gas proportional valve according to the target proportional valve opening. By adopting the method and the device, the gas proportional valve can be positioned at the target proportional valve opening with the best combustion efficiency of flame and the best discharge efficiency of smoke.

Description

Control method and device for fuel gas proportional valve

Technical Field

The invention relates to the technical field of wall-mounted furnaces, in particular to a control method and device for a fuel gas proportional valve.

Background

Compared with the common wall-mounted furnace, the full-premix wall-mounted furnace has higher efficiency, lower emission and higher comfort, the energy efficiency of the full-premix wall-mounted furnace can be up to 108 percent, and the emission of nitrogen oxides can be lower than 30 mg/kW.h.

However, the air-fuel ratio of the fully premixed wall-mounted furnace is high. In the prior art, the air-fuel ratio of the fully premixed wall-mounted furnace is adjusted by detecting the component proportion of the smoke by a user through a smoke analyzer so as to adjust the opening of the proportional valve of the gas proportional valve. The adjusting method is easy to make mistakes, and the air-fuel ratio is offset, so that the problem that the full premix wall-mounted furnace generates noise or the emission exceeds the standard is solved. Therefore, a control method of the fuel gas proportional valve of the wall-mounted furnace is needed.

Disclosure of Invention

In view of the foregoing, it is desirable to provide a control method and apparatus for a fuel gas proportional valve.

In a first aspect, there is provided a control method of a gas proportional valve, the method comprising:

after receiving a gas proportional valve adjusting instruction of a wall-mounted furnace of a user, controlling the gas proportional valve to be opened according to a first opening value stored in advance;

after the wall-mounted furnace is successfully ignited, controlling a fan to operate according to a first power stored in advance, so that a mixture of fuel gas and oxygen is pumped into a combustion chamber of the wall-mounted furnace;

Increasing the proportional valve opening of the fuel gas proportional valve according to a preset opening adjustment interval and an opening adjustment threshold, acquiring flame ion current detected by an ion probe, and determining an actual measurement curve of the proportional valve opening of the wall-mounted furnace and the flame ion current until the flame ion current is in a decreasing trend, and stopping increasing the proportional valve opening of the fuel gas proportional valve;

and determining the current target proportional valve opening of the wall-mounted furnace and the corresponding target flame ion current according to the actual measurement curve and curves of the opening of the proportional valves and the flame ion current stored in advance, and controlling the fuel gas proportional valve according to the target proportional valve opening.

As an optional implementation manner, the determining, according to the actual measurement curve and the curves of the opening degrees of the plurality of proportional valves and the flame ion currents stored in advance, the current target opening degree of the proportional valve of the wall-mounted boiler and the corresponding target flame ion current includes:

comparing the actual measurement curve with a plurality of prestored proportional valve opening and flame ion current curves, and determining a target curve closest to the actual measurement curve;

and determining the current target proportional valve opening of the wall-mounted furnace and the corresponding target flame ion current according to the target curve.

As an alternative embodiment, the method further comprises:

acquiring corresponding actual flame ion current when the gas proportional valve is at the opening of the target proportional valve;

if the difference value between the actual flame ion current and the target flame ion current is smaller than or equal to the product of a preset proportionality coefficient and the target flame ion current, controlling the fuel gas proportional valve according to the opening of the target proportional valve;

and if the difference value between the actual flame ion current and the target flame ion current is larger than the product of the preset proportionality coefficient and the target flame ion current, executing the step of controlling the opening of the fuel gas proportional valve according to the prestored first opening value.

As an alternative embodiment, the method further comprises:

and if the difference value between the actual flame ion current and the target flame ion current is larger than the accumulated times of the products of the preset proportionality coefficient and the target flame ion current and exceeds a preset times threshold value, triggering fault locking.

As an alternative embodiment, the method further comprises:

when the accumulated operation time of the wall-mounted boiler reaches a preset accumulated operation time threshold, sending prompt information, wherein the prompt information is used for prompting a user to send the gas proportional valve regulating instruction;

If the gas proportional valve adjusting instruction issued by the user is not received, sending out the prompt message every preset time period until the gas proportional valve is controlled according to the opening of the target proportional valve;

and after the gas proportional valve is controlled according to the opening of the target proportional valve, resetting the accumulated running duration of the wall-mounted furnace, and restarting timing.

In a second aspect, there is provided a control device for a gas proportional valve, the device comprising:

the receiving module is used for controlling the gas proportional valve to be opened according to a first opening value stored in advance after receiving a gas proportional valve adjusting instruction of the wall-mounted furnace of a user;

the control module is used for controlling the operation of the fan according to the first power stored in advance after the wall-mounted furnace is successfully ignited, so that the mixture of fuel gas and oxygen is pumped into the combustion chamber of the wall-mounted furnace;

the increasing module is used for increasing the opening of the proportional valve of the fuel gas proportional valve according to a preset opening adjustment interval and an opening adjustment threshold value, acquiring flame ion current detected by an ion probe, determining an actual measurement curve of the opening of the proportional valve of the wall-mounted furnace and the flame ion current, and stopping increasing the opening of the proportional valve of the fuel gas proportional valve until the flame ion current is in a decreasing trend;

The determining module is used for determining the current target proportional valve opening of the wall-mounted furnace and the corresponding target flame ion current according to the actual measurement curve and the curves of the opening of the proportional valves and the flame ion current stored in advance, and controlling the fuel gas proportional valve according to the target proportional valve opening.

As an optional implementation manner, the determining module is specifically configured to:

As an alternative embodiment, the apparatus further comprises:

the acquisition module is used for acquiring the corresponding actual flame ion current when the gas proportional valve is at the opening of the target proportional valve;

the first comparison module is used for controlling the fuel gas proportional valve according to the opening of the target proportional valve if the difference value between the actual flame ion current and the target flame ion current is smaller than or equal to the product of a preset proportional coefficient and the target flame ion current;

And the second comparison module is used for executing the step of controlling the opening of the fuel gas proportional valve according to the pre-stored first opening value if the difference value of the actual flame ion current and the target flame ion current is larger than the product of the preset proportionality coefficient and the target flame ion current.

As an alternative embodiment, the apparatus further comprises:

a locking module for triggering fault locking if the difference between the actual flame ion current and the target flame ion current is greater than the accumulated number of times of the product of the preset proportionality coefficient and the target flame ion current exceeds a preset number threshold

As an alternative embodiment, the apparatus further comprises:

the first prompting module is used for sending prompting information when the accumulated operation time length of the wall-mounted furnace reaches a preset accumulated operation time length threshold value, and the prompting information is used for prompting a user to send the gas proportional valve regulating instruction;

the second prompting module is used for sending the prompting information every preset time period until the gas proportional valve is controlled according to the opening of the target proportional valve if the gas proportional valve regulating instruction issued by the user is not received;

And the zero clearing module is used for clearing the accumulated running duration of the wall-mounted furnace and restarting timing after controlling the fuel gas proportional valve according to the opening of the target proportional valve.

In a third aspect, there is provided a control system of a gas proportional valve, the control system of the gas proportional valve comprising: a control method of a gas proportional valve as described in the first aspect and a control device of a gas proportional valve as described in the second aspect.

In a fourth aspect, a computer device is provided, comprising a memory and a processor, the memory having stored thereon a computer program executable on the processor, the processor implementing the method steps according to the first aspect when the computer program is executed.

In a fifth aspect, a computer-readable storage medium is provided, on which a computer program is stored which, when being executed by a processor, carries out the method steps according to the first aspect.

The application provides a control method and device of a fuel gas proportional valve, and the technical scheme provided by the embodiment of the application at least brings the following beneficial effects: after receiving a gas proportional valve adjusting instruction of a wall-mounted furnace of a user, controlling the gas proportional valve to be opened according to a first opening value stored in advance; after the wall-mounted furnace is successfully ignited, controlling a fan to operate according to a first power stored in advance, so that a mixture of fuel gas and oxygen is pumped into a combustion chamber of the wall-mounted furnace; increasing the proportional valve opening of the fuel gas proportional valve according to a preset opening adjustment interval and an opening adjustment threshold, acquiring flame ion current detected by an ion probe, and determining an actual measurement curve of the proportional valve opening of the wall-mounted furnace and the flame ion current until the flame ion current is in a decreasing trend, and stopping increasing the proportional valve opening of the fuel gas proportional valve; and determining the current target proportional valve opening of the wall-mounted furnace and the corresponding target flame ion current according to the actual measurement curve and curves of the opening of the proportional valves and the flame ion current stored in advance, and controlling the fuel gas proportional valve according to the target proportional valve opening. In this way, the actual measurement curve of the proportional valve opening and the flame ion current can be obtained by gradually increasing the proportional valve opening of the fuel gas proportional valve and detecting the flame ion current in real time by using the ion probe while increasing the proportional valve opening. And determining the target proportional valve opening and the target flame ion current of the current wall-mounted furnace according to the actual measurement curve and the curves of the opening and the flame ion current of the plurality of proportional valves stored in advance, and controlling the fuel gas proportional valve according to the opening of the target proportional valve. Thus, the opening of the proportional valve is in an optimal state, so that the combustion efficiency of the flame of the combustion chamber and the discharge efficiency of the smoke are optimal.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.

Drawings

In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural diagram of a control system of a fuel gas proportional valve according to an embodiment of the present disclosure;

FIG. 2 is a flowchart of a control method of a fuel gas proportional valve according to an embodiment of the present disclosure;

fig. 3 is a schematic structural diagram of a control device for a fuel gas proportional valve according to an embodiment of the present application;

fig. 4 is a schematic structural diagram of a computer device according to an embodiment of the present application.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application will be further described in detail with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the present application.

The control method of the fuel gas proportional valve can be applied to a control system of the fuel gas proportional valve. As shown in fig. 1, the control system of the gas proportional valve comprises a controller 101, a gas proportional valve 102, a fan 103 and an ion probe 104. The controller 101 is respectively connected with the gas proportional valve 102, the fan 103 and the ion probe 104.

The controller 101 is configured to control, after receiving a command for adjusting the gas proportional valve 102 of the wall-mounted boiler, the gas proportional valve 102 to be opened according to a first opening value stored in advance. After the wall-mounted furnace is successfully ignited, the fan 103 is controlled to run according to the prestored first power. Increasing the proportional valve opening of the gas proportional valve 102 according to a preset opening adjustment interval and an opening adjustment threshold, acquiring flame ion current detected by the ion probe 104, and determining an actual measurement curve of the proportional valve opening and the flame ion current of the wall-mounted furnace until the flame ion current is in a decreasing trend, and stopping increasing the proportional valve opening of the gas proportional valve 102. And determining the target proportional valve opening of the current wall-mounted furnace and the corresponding target flame ion current according to the actual measurement curve and the curves of the plurality of proportional valve openings and the flame ion current stored in advance, and controlling the gas proportional valve 102 according to the target proportional valve opening.

The gas proportional valve 102 is used for adjusting the opening degree of the proportional valve according to the instruction of the controller 101.

The fan 103 is configured to receive an on command of the controller 101, and in an operation process, make a mixture of fuel gas and oxygen be pumped into a combustion chamber of the hanging stove.

An ion probe 104 for detecting a flame ion current of the flame and uploading the detected flame ion current to the controller 101.

The control method of a fuel gas proportional valve provided in the embodiment of the present application will be described in detail with reference to the specific implementation manner, and fig. 2 is a flowchart of the control method of a fuel gas proportional valve provided in the embodiment of the present application, and as shown in fig. 2, specific steps are as follows:

step 201, after receiving a gas proportional valve adjusting instruction of a wall-mounted boiler of a user, controlling the gas proportional valve to be opened according to a first opening value stored in advance.

In implementation, the full premix wall-mounted furnace has high requirement on air-fuel ratio. In the prior art, the air-fuel ratio of the fully premixed wall-mounted furnace is adjusted by detecting the component proportion of the smoke by a user through a smoke analyzer so as to adjust the opening of the proportional valve of the gas proportional valve. The adjusting method is easy to make mistakes, and the air-fuel ratio is offset, so that the problem that the full premix wall-mounted furnace generates noise or the emission exceeds the standard is solved. Therefore, in order to prevent the air-fuel ratio imbalance of the wall-mounted furnace, the gas proportional valve of the wall-mounted furnace needs to be adjusted, so that the gas proportional valve is in the optimal proportional valve opening, and the air-fuel ratio imbalance can be avoided, thereby causing the problems of noise, ignition failure, excessive discharge and the like of the full premix wall-mounted furnace. Under the fault-free locking state, a user can start the self-adaptive gas proportional valve through a single key or a combination key or a menu starting mode of the operator, and a gas proportional valve regulating instruction of the wall-mounted furnace of the user is received. After receiving a gas proportional valve adjusting instruction of a wall-mounted boiler of a user, controlling the gas proportional valve to be opened or controlling an electromagnetic proportional valve of the gas proportional valve to be opened by controlling a stepping motor on the gas proportional valve to operate according to a first opening value stored in advance. The first opening value is slightly larger than the opening value used by a daily user, but is not the maximum proportional valve opening, so that the ignition is easier to ignite in the subsequent ignition, and the ignition success rate is improved.

Further, after the self-adaptive adjustment of the gas proportional valve is performed, the display screen of the wall-mounted furnace is locked, and a user cannot perform other operations.

Step 202, after the wall-mounted furnace is successfully ignited, controlling the operation of a fan according to the pre-stored first power, so that the mixture of fuel gas and oxygen is pumped into a combustion chamber of the wall-mounted furnace.

In implementation, after the gas proportional valve is controlled to be opened according to a first opening value stored in advance, the controller controls to start an ignition program, and after successful ignition is detected, the fan is controlled to be opened, so that a mixture of gas and oxygen is pumped into a combustion chamber of the wall-mounted furnace by the fan. The fan can be controlled to operate according to the first power, flame of combustion is larger than that of a daily user during use, and the flame ion current collected later is ensured to be more accurate. Therefore, after the wall-mounted furnace is successfully ignited, the fan is controlled to operate according to the first power stored in advance, so that the mixture of the fuel gas and the oxygen is pumped into the combustion chamber of the wall-mounted furnace.

Step 203, increasing the proportional valve opening of the fuel gas proportional valve according to a preset opening adjustment interval and an opening adjustment threshold, acquiring flame ion current detected by an ion probe, and determining an actual measurement curve of the proportional valve opening and the flame ion current of the wall-mounted furnace until the flame ion current is in a decreasing trend, and stopping increasing the proportional valve opening of the fuel gas proportional valve.

In practice, in order to prevent the air-fuel ratio of the wall-hanging stove from being out of balance, the gas proportional valve of the wall-hanging stove needs to be adjusted so that the gas proportional valve is at the optimal proportional valve opening degree and the optimal flame ion current. When the wall-mounted furnace is at the optimal opening of the proportional valve, the combustion efficiency of the flame in the combustion chamber and the discharge efficiency of the smoke generated after combustion are optimal. When the flame in the combustion chamber increases, the flame ion current of the flame also increases. Therefore, it is possible to draw curves corresponding to the flame ion current and the proportional valve opening, and in the subsequent step, determine the optimal proportional valve opening and the optimal flame ion current for each curve of the flame ion current and the proportional valve opening. Because the gas proportional valve of the wall-mounted furnace is gradually increased in the process from small to large, the content of gas is gradually increased. Meanwhile, when the gas content is just increased, the flame of combustion is also increased gradually, and then the flame ion current detected by the ion probe is correspondingly increased gradually. Then, as the gas content increases, the flame ion current peaks. When the gas content is increased again, the gas content is too much, the oxygen content is less, and too much gas cannot be fully combusted by oxygen, so that the flame ion current starts to show a decreasing trend at the moment, and the opening of the proportional valve is not required to be increased any more. Therefore, when the flame ion current shows a decreasing trend and reaches a preset value, the increase of the proportional valve opening of the fuel gas proportional valve is stopped. The preset value is a flame ion current value which is reduced after the flame ion current reaches the maximum value. Therefore, the proportional valve opening of the fuel gas proportional valve can be increased according to the preset opening adjustment interval and the opening adjustment threshold, flame ion current detected by the ion probe is obtained, and the actual measurement curves of the proportional valve opening and the flame ion current of the wall-mounted furnace are determined until the flame ion current is in a decreasing trend, and the increase of the proportional valve opening of the fuel gas proportional valve is stopped. The air-fuel ratio corresponding to the optimal proportional valve opening and the optimal flame ion current can be 1.1 or 1.2.

And 204, determining the target proportional valve opening of the current wall-mounted furnace and the corresponding target flame ion current according to the actual measurement curve and the curves of the opening of the plurality of proportional valves and the flame ion current stored in advance, and controlling the fuel gas proportional valve according to the target proportional valve opening.

In the implementation, in the process of drawing the curves of the flame ion current and the proportional valve opening, for each proportional valve opening and the flame ion current, a technician detects the combustion efficiency of the flame in the corresponding combustion chamber and the discharge efficiency of the smoke generated after combustion, so that the optimal combustion efficiency of the flame and the discharge efficiency of the smoke of each curve of the flame ion current and the proportional valve opening are obtained. Because the curves corresponding to the flame ion current and the proportional valve opening degree are different under different fuel gas components and different environmental conditions, the corresponding optimal flame combustion efficiency and smoke emission efficiency are achieved. Wherein the environmental conditions include temperature, air pressure, ring pressure, etc. Thus, a technician can measure curves of the opening degree of the proportional valves and the flame ion current under different gas compositions and environmental conditions in a laboratory in advance. The controller stores a plurality of proportional valve opening and flame ion current curves or stores a plurality of proportional valve opening and flame ion current curves into a database. According to the actual measurement curve obtained in the steps and curves of the openings of the proportional valves and flame ion currents stored in advance, determining the target proportional valve opening of the current wall-mounted furnace and the corresponding target flame ion current, and controlling the fuel gas proportional valve according to the target proportional valve opening. Thus, the fuel gas proportional valve can be positioned at the optimal proportional valve opening.

Specifically, the specific procedure for executing step 204 is as follows:

comparing the actual measurement curve with a plurality of prestored proportional valve opening and flame ion current curves, and determining a target curve closest to the actual measurement curve.

In implementation, after obtaining the actual measurement curves of the current flame ion current and the proportional valve opening, the actual measurement curves can be compared with the curves of the multiple proportional valve openings and the flame ion current stored in advance, the curve of the proportional valve opening and the flame ion current closest to the actual measurement curves is determined, and the curve of the proportional valve opening and the flame ion current is determined as the target curve of the actual measurement curves.

And step two, determining the opening of a target proportional valve of the current wall-mounted furnace and the corresponding target flame ion current according to the target curve.

In the implementation, when a technician draws curves of a plurality of corresponding proportional valve openings and flame ion currents under each gas component and environmental conditions, the technician detects the combustion efficiency of the flame in the corresponding combustion chamber and the discharge efficiency of smoke generated after combustion for each proportional valve opening and flame ion current of each curve, so that the optimal combustion efficiency of the flame and the discharge efficiency of the smoke of each curve of the flame ion current and the proportional valve opening are obtained. Therefore, the optimal proportional valve opening and the optimal flame ion current of the target curve with the closest actual measurement curve are the target proportional valve opening and the corresponding target flame ion current of the current wall-mounted furnace. Therefore, the opening of the target proportional valve of the current wall-mounted furnace and the corresponding target flame ion current can be determined according to the target curve.

Further, after the target curve is determined, the opening of the target proportional valve and the corresponding target flame ion current can be determined according to the target curve and the compensation value.

Further, after determining the target proportional valve opening and the target flame ion current of the current wall-mounted furnace, verifying the detected target proportional valve opening, and judging whether the target proportional valve opening is the optimal proportional valve opening of the current wall-mounted furnace, wherein the specific steps are as follows:

and step A, obtaining the corresponding actual flame ion current when the gas proportional valve is at the target proportional valve opening.

In the implementation, after determining the target proportional valve opening, the target proportional valve opening needs to be checked to determine whether the target proportional valve opening is the optimal proportional valve opening of the current wall-mounted furnace. And controlling a gas proportional valve of the wall-mounted furnace according to the currently determined opening of the target proportional valve, and acquiring the corresponding actual flame ion current at the moment. And comparing the actual flame ion current with the target flame ion current in the subsequent step, so as to judge whether the target proportional valve opening is the optimal proportional valve opening of the current wall-mounted furnace.

And B, if the difference value between the actual flame ion current and the target flame ion current is smaller than or equal to the product of the preset proportionality coefficient and the target flame ion current, controlling the fuel gas proportional valve according to the opening of the target proportional valve.

In the implementation, after the actual flame ion current is obtained, determining a difference value between the actual flame ion current and the target flame ion current, if the difference value is smaller, the current target proportional valve opening is the optimal proportional valve opening, and the target curve is the closest curve. Thus, a difference between the actual flame ion current and the target flame ion current may be determined, and then the difference between the actual flame ion current and the target flame ion current and a product of the preset scaling factor and the target flame ion current may be compared. If the difference value between the actual flame ion current and the target flame ion current is smaller than or equal to the product of the preset proportionality coefficient and the target flame ion current, the current target proportional valve opening is the optimal proportional valve opening, and the target curve is the closest curve, the gas proportional valve can be controlled according to the target proportional valve opening. Thus, verification of the curve and the target proportional valve opening is completed.

Further, when the gas proportional valve is controlled according to the opening of the target proportional valve, that is to say, after the gas self-adaption is completed, the display screen of the wall-mounted furnace returns to normal operation, and the accumulated running time accumulated by the timer is reset to zero.

And C, if the difference value between the actual flame ion current and the target flame ion current is larger than the product of the preset proportionality coefficient and the target flame ion current, executing the step of controlling the opening of the fuel gas proportional valve according to the pre-stored first opening value.

In an implementation, the difference between the actual flame ion current and the target flame ion current is compared to a product of a preset scaling factor and the target flame ion current. If the difference between the actual flame ion current and the target flame ion current is larger than the product of the preset proportionality coefficient and the target flame ion current, the verification fails, the currently determined target proportional valve opening is not the optimal proportional valve opening of the current wall-mounted furnace, and the target curve is not the closest curve. It is also necessary to re-determine the optimal proportional valve opening so that both the combustion efficiency of the flame and the discharge efficiency of the smoke are optimal. In order to ensure that the determined optimal proportional valve opening is more accurate, the actual measurement curve of the flame ion current and the proportional valve opening in the current wall-mounted furnace can be obtained again, so that the newly measured actual measurement curve is more in line with the corresponding relation between the flame ion current and the proportional valve opening of the current wall-mounted furnace. Therefore, if the difference between the actual flame ion current and the target flame ion current is greater than the product of the preset proportionality coefficient and the target flame ion current, the step of controlling the opening of the fuel gas proportional valve according to the pre-stored first opening value is executed.

Further, if failure occurs, fault locking is required, and the specific steps are as follows:

and D, triggering fault locking if the difference value between the actual flame ion current and the target flame ion current is larger than the accumulated number of times of the product of the preset proportionality coefficient and the target flame ion current and exceeds a preset number threshold value.

In the implementation, if the difference between the actual flame ion current and the target flame ion current is greater than the accumulated number of times of the product of the preset proportionality coefficient and the target flame ion current exceeds the preset number threshold, the target proportional valve opening after multiple adjustments is not the optimal proportional valve opening. Then, it is judged that the wall hanging stove is likely to have a fault, so that the opening degree of the target proportional valve cannot be adjusted all the time. Therefore, if the difference between the actual flame ion current and the target flame ion current is greater than the accumulated number of times of the product of the preset proportionality coefficient and the target flame ion current exceeds the preset number of times threshold, fault locking is triggered. The preset number of times threshold may be three, which is not limited herein, and the preset scaling factor may be 3%.

Further, when the operation time of the wall-mounted furnace is long, the optimal proportional valve opening of the gas proportional valve of the wall-mounted furnace is different due to the influence of the structure of the wall-mounted furnace, so that after the wall-mounted furnace is operated for a period of time, the gas proportional valve is required to be adjusted, and the proportional valve opening is adjusted to the current corresponding optimal proportional valve opening.

And E, when the accumulated operation time of the wall-mounted furnace reaches a preset accumulated operation time threshold, sending out prompt information, wherein the prompt information is used for prompting a user to send out a fuel gas proportional valve regulating instruction.

In practice, the timing is started when the wall hanging stove is detected to be on fire, and the timing is stopped and data is stored when the flame is detected to be off until the next time of ignition is continued. When the accumulated running time of the wall-mounted furnace reaches a preset accumulated running time threshold, the operation panel or the controller (software or applet) sends out prompt information, and the prompt information is used for prompting a user to send out a fuel gas proportional valve regulating instruction, but the running of the wall-mounted furnace is not locked. The preset cumulative operating duration threshold may be 1000 hours, which is not limited herein.

And F, if the gas proportional valve adjusting instruction issued by the user is not received, sending out the prompt information every preset time period until the gas proportional valve is controlled according to the opening of the target proportional valve.

In the implementation, after the user receives the prompt information, the user can ignore the prompt information, and the wall-mounted furnace continues to operate, but the wall-mounted furnace can send the prompt information to remind the user once at intervals until the gas proportional valve is controlled according to the opening of the target proportional valve, that is to say, the prompt information is closed until the gas self-adaption of the wall-mounted furnace is completed. The user can also press the power key of the operation panel for a long time to close the prompt message.

And G, after the gas proportional valve is controlled according to the opening of the target proportional valve, resetting the accumulated running duration of the wall-mounted furnace, and restarting timing.

In the implementation, after the gas proportional valve is controlled according to the opening of the target proportional valve, the gas self-adaption of the wall-mounted furnace is described to be completed, and at the moment, the accumulated running duration of the wall-mounted furnace can be cleared, and timing can be restarted.

The embodiment of the application provides a control method of a fuel gas proportional valve, wherein the actual measurement curve of the proportional valve opening and the flame ion current can be obtained by gradually increasing the proportional valve opening of the fuel gas proportional valve and detecting the flame ion current in real time by using an ion probe while increasing the proportional valve opening. And determining the target proportional valve opening and the target flame ion current of the current wall-mounted furnace according to the actual measurement curve and the curves of the opening and the flame ion current of the plurality of proportional valves stored in advance, and controlling the fuel gas proportional valve according to the opening of the target proportional valve. Thus, the opening of the proportional valve is in an optimal state, so that the combustion efficiency of the flame of the combustion chamber and the discharge efficiency of the smoke are optimal.

It should be understood that, although the steps in the flowchart of fig. 2 are shown in sequence as indicated by the arrows, the steps are not necessarily performed in sequence as indicated by the arrows. The steps are not strictly limited to the order of execution unless explicitly recited herein, and the steps may be executed in other orders. Moreover, at least a portion of the steps in fig. 2 may include a plurality of steps or stages, which are not necessarily performed at the same time, but may be performed at different times, and the order of the steps or stages is not necessarily sequential, but may be performed in rotation or alternatively with at least a portion of the steps or stages in other steps or other steps.

It should be understood that the same/similar parts of the embodiments of the method described above in this specification may be referred to each other, and each embodiment focuses on differences from other embodiments, and references to descriptions of other method embodiments are only needed.

The embodiment of the application also provides a control device of the fuel gas proportional valve, as shown in fig. 3, the device comprises:

the receiving module 301 is configured to control, after receiving a gas proportional valve adjustment instruction of a wall-mounted boiler of a user, the gas proportional valve to be opened according to a first opening value stored in advance;

the control module 302 is configured to control, after the wall-mounted stove is successfully ignited, the fan to operate according to the first power stored in advance, so that a mixture of fuel gas and oxygen is pumped into the combustion chamber of the wall-mounted stove;

the increasing module 303 is configured to increase the proportional valve opening of the gas proportional valve according to a preset opening adjustment interval and an opening adjustment threshold, obtain a flame ion current detected by an ion probe, and determine an actual measurement curve of the proportional valve opening of the wall-mounted furnace and the flame ion current until the flame ion current is in a decreasing trend, and stop increasing the proportional valve opening of the gas proportional valve;

And the determining module 304 is configured to determine a current target proportional valve opening of the wall-mounted boiler and a corresponding target flame ion current according to the actual measurement curve and curves of a plurality of proportional valve openings and flame ion currents stored in advance, and control the gas proportional valve according to the target proportional valve opening.

As an alternative embodiment, the determining module 304 is specifically configured to:

As an alternative embodiment, the apparatus further comprises:

The embodiment of the application provides a control device of a fuel gas proportional valve, by gradually increasing the proportional valve opening of the fuel gas proportional valve and detecting flame ion current in real time by using an ion probe while increasing the proportional valve opening, the actual measurement curve of the proportional valve opening and the flame ion current can be obtained. And determining the target proportional valve opening and the target flame ion current of the current wall-mounted furnace according to the actual measurement curve and the curves of the opening and the flame ion current of the plurality of proportional valves stored in advance, and controlling the fuel gas proportional valve according to the opening of the target proportional valve. Thus, the opening of the proportional valve is in an optimal state, so that the combustion efficiency of the flame of the combustion chamber and the discharge efficiency of the smoke are optimal.

For a specific definition of the control device of the gas proportional valve, reference is made to the definition of the control method of the gas proportional valve described above, and the detailed description thereof will be omitted. The respective modules in the control device of the fuel gas proportional valve can be realized in whole or in part by software, hardware and a combination thereof. The above modules may be embedded in hardware or may be independent of a processor in the computer device, or may be stored in software in a memory in the computer device, so that the processor may call and execute operations corresponding to the above modules.

In one embodiment, a computer device is provided, as shown in fig. 4, and includes a memory and a processor, where the memory stores a computer program that can be run on the processor, and the processor executes the computer program to implement the control method steps of the fuel gas proportional valve.

In one embodiment, a computer readable storage medium has stored thereon a computer program which, when executed by a processor, performs the steps of the control method of a gas proportional valve described above.

Those skilled in the art will appreciate that implementing all or part of the above described methods may be accomplished by way of a computer program stored on a non-transitory computer readable storage medium, which when executed, may comprise the steps of the embodiments of the methods described above. Any reference to memory, storage, database, or other medium used in the various embodiments provided herein may include non-volatile and/or volatile memory. The nonvolatile memory can include Read Only Memory (ROM), programmable ROM (PROM), electrically Programmable ROM (EPROM), electrically Erasable Programmable ROM (EEPROM), or flash memory. Volatile memory can include Random Access Memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in a variety of forms such as Static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double Data Rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous Link DRAM (SLDRAM), memory bus direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM), among others.

It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

It should be noted that, user information (including but not limited to user equipment information, user personal information, etc.) and data (including but not limited to data for presentation, analyzed data, etc.) referred to in the present application are information and data authorized by the user or sufficiently authorized by each party.

In this specification, each embodiment is described in a related manner, and identical and similar parts of each embodiment are all referred to each other, and each embodiment mainly describes differences from other embodiments. In particular, for system embodiments, since they are substantially similar to method embodiments, the description is relatively simple, as relevant to see a section of the description of method embodiments.

The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples merely represent a few embodiments of the present application, which are described in more detail and are not to be construed as limiting the scope of the invention. It should be noted that it would be apparent to those skilled in the art that various modifications and improvements could be made without departing from the spirit of the present application, which would be within the scope of the present application. Accordingly, the scope of protection of the present application is to be determined by the claims appended hereto.

Claims

1. A method of controlling a gas proportioning valve, the method comprising:

2. The method of claim 1, wherein determining the current target proportional valve opening and the corresponding target flame ion current of the wall-mounted furnace according to the measured curve and the curves of the plurality of proportional valve openings and the flame ion current stored in advance comprises:

3. The method according to claim 1, wherein the method further comprises:

4. A method according to claim 3, characterized in that the method further comprises:

5. The method according to claim 1, wherein the method further comprises:

6. A control device for a gas proportioning valve, the device comprising:

7. The apparatus according to claim 6, wherein the determining module is specifically configured to:

8. The apparatus of claim 6, wherein the apparatus further comprises:

9. The apparatus of claim 8, wherein the apparatus further comprises:

and the locking module is used for triggering fault locking if the difference value between the actual flame ion current and the target flame ion current is larger than the accumulated times of the products of the preset proportionality coefficient and the target flame ion current and exceeds a preset times threshold value.

10. The apparatus of claim 6, wherein the apparatus further comprises: