Gas stove control method and gas stove

Abstract

The embodiment of the invention provides a gas stove control method and a gas stove, and relates to the technical field of kitchen appliances. The gas stove control method comprises the steps that flame ion current is obtained, whether the flame ion current is a stable value or a change value is judged, and if the flame ion current is the change value, whether a change curve of the change value of the flame ion current conforms to a preset curve or not is judged; if the change curve accords with a preset curve, the current air flow of the gas stove is kept; if the change curve does not conform to the preset curve, whether the fluctuation range of the change curve is within the preset range or not is judged, and if the fluctuation range of the change curve is within the preset range, the air flow of the gas stove is increased. Through the control method of the gas stove, sufficient combustion of the gas stove in any firepower state can be realized, so that the content of harmful substances in smoke is reduced, the use safety and health of a user are improved, and the policy requirement of low emission is met.

Description

Technical Field

[0001] The present invention relates to the technical field of kitchen appliances, and in particular to a gas stove control method and a gas stove. Background Art

[0002] During the use of gas stoves, if the flame does not burn completely, harmful substances such as carbon monoxide may be produced. To reduce pollutant emissions in the flue gas, existing technologies generally optimize the ejector structure to introduce a more reasonable air ratio, thereby promoting the full combustion process and ensuring that the concentration of harmful substances in the flue gas meets the requirements of relevant emission standards.

[0003] However, the test conditions underlying these technical solutions are typically standard laboratory environments. In practice, if the gas composition or supply pressure in a user's home changes, or if the combustion system fails to adapt promptly during adjustments to the stove's power level, the flame may deviate from optimal combustion conditions, leading to incomplete combustion and an increase in the level of harmful substances in the flue gas. This not only impacts user safety and health, but also makes it difficult to meet policy requirements for low-emission, environmentally friendly stoves. Summary of the Invention

[0004] The purpose of the present invention is to provide a gas stove control method and a gas stove, which can fully burn under any fire state, reduce the content of harmful substances in the flue gas, improve the safety and health of users, and meet the low emission policy requirements.

[0005] The embodiment of the present invention is achieved as follows: In a first aspect, the present invention provides a gas stove control method, comprising: Obtain flame ion current; determining whether the flame ion current is a stable value or a changing value; If the flame ion current is a changing value, determining whether a changing curve of the flame ion current changing value conforms to a preset curve; If the change curve conforms to the preset curve, the current air flow of the gas stove is maintained; If the change curve does not conform to the preset curve, determining whether the fluctuation range of the change curve is within the preset range; If the fluctuation range of the change curve is within the preset range, the air flow of the gas stove is increased.

[0006] In an optional embodiment, after the step of determining whether the fluctuation range of the change curve is within a preset range, the gas stove control method further includes: If the fluctuation range of the change curve is not within the preset range, an alarm signal is output.

[0007] In an optional embodiment, after the step of outputting an alarm signal if the fluctuation range of the variation curve is not within the preset range, the gas stove control method further includes: If the gas flow rate is zero within the first preset time period, the alarm signal is stopped from being output; If the first preset time period is exceeded and the obtained gas flow is not zero, the gas valve is closed and the output of the alarm signal is stopped.

[0008] In an optional embodiment, after the step of determining whether the flame ion current is a stable value or a changing value, the gas stove control method further includes: If the flame ion current is a stable value, determining whether the flame ion current stable value is lower than a stable preset current value; If the flame ion current stable value is not lower than the stable preset current value, then maintain the current state; If the flame ion current stable value is lower than the stable preset current value, an alarm signal is output.

[0009] In an optional embodiment, after the step of outputting an alarm signal if the flame ion current is lower than the stable preset current value, the gas stove control method further includes: If the acquired gas flow rate is zero within the second preset time period, the alarm signal is stopped from being output; If the second preset time period is exceeded and the obtained gas flow is not zero, the gas valve is closed and the output of the alarm signal is stopped.

[0010] In an optional embodiment, the step of obtaining the flame ion current includes: Get the flame ion concentration; The flame ion current is obtained according to the flame ion concentration.

[0011] In a second aspect, the present invention provides a gas stove comprising: Burner seat; A fire cover, the fire cover being arranged on the burner base; A flame ion sensor, which is disposed on the burner base and is used to obtain the flame ion concentration of the burner cover; an air intake system, the air intake system comprising an ejector pipe, an injection pipe, and a blower, the ejector pipe being connected to the burner base, the injection pipe being in communication with the ejector pipe, and the blower being used to deliver primary air into the ejector pipe; and A controller is electrically connected to the flame ion sensor and the blower, and is used to obtain a flame ion current based on the flame ion concentration. The controller is also used to determine whether the flame ion current value is stable and whether a change curve of the change value conforms to a preset curve. When the change curve does not conform to the preset curve and the fluctuation range of the change curve is within a preset range, the controller is used to control the blower to increase the air flow entering the ejector tube.

[0012] In an optional embodiment, the fire cover includes an inner ring fire cover and an outer ring fire cover, and the flame ion sensor includes an inner ring flame ion sensing portion and an outer ring flame ion sensing portion, the inner ring flame ion sensing portion is arranged between the inner ring fire cover and the outer ring fire cover, and is used to obtain the flame ion concentration of the inner ring fire cover; the outer ring flame ion sensing portion is arranged at a distance from the side of the outer ring fire cover away from the inner ring fire cover, and is used to obtain the flame ion concentration of the outer ring fire cover; The ejector pipe includes an inner ring ejector pipe and an outer ring ejector pipe, the inner ring ejector pipe cooperates with the inner ring fire cover, and the outer ring ejector pipe cooperates with the outer ring fire cover; the injection pipe includes an inner ring injection pipe and an outer ring injection pipe, the inner ring injection pipe and the outer ring injection pipe are respectively connected to the inner ring ejector pipe and the outer ring ejector pipe; The blower includes an inner ring blower and an outer ring blower, the inner ring blower cooperates with the inner ring ejector tube, and the outer ring blower cooperates with the outer ring ejector tube; Wherein, the controller is electrically connected to the inner ring flame ion sensing portion, the outer ring flame ion sensing portion, the inner ring blower and the outer ring blower at the same time.

[0013] In an optional embodiment, the air intake system further includes a gas valve and an air intake pipe, the gas valve is connected to the inner ring injection pipe and the outer ring injection pipe at the same time, the air intake pipe is connected to the gas valve, and the controller is electrically connected to the gas valve.

[0014] In an optional embodiment, the distance between the flame ion sensor and the fire hole of the fire cover is 1 mm to 6 mm.

[0015] The beneficial effects of the embodiments of the present invention include: The gas stove control method provided in this embodiment includes obtaining a flame ion current, determining whether the flame ion current is a stable value or a changing value, and if the flame ion current is a changing value, determining whether a change curve of the flame ion current change value conforms to a preset curve; if the change curve conforms to the preset curve, maintaining the current air flow of the gas stove; if the change curve does not conform to the preset curve, determining whether the fluctuation range of the change curve is within a preset range; if the fluctuation range of the change curve is within the preset range, increasing the air flow of the gas stove. It is easy to understand that the preset curve is an ideal curve formed by the change value of the flame ion current when the gas is fully burned. By comparing the change curve of the flame ion current change value with the preset curve, when the change curve conforms to the preset curve, the current air flow of the gas stove is maintained; and when the change curve does not conform to the preset curve, it is further judged whether the fluctuation range of the change curve is within the preset range. If the fluctuation range is within the preset range, the air flow of the current gas stove is increased to adjust the ratio of gas to air, so as to achieve full combustion of the gas under any fire power state, and is not affected by changes in the external environment gas supply pressure, differences in gas composition, user adjustment of fire power and other usage scenarios, thereby reducing the content of harmful substances in the flue gas, improving user safety and health, and meeting the low emission policy requirements.

[0016] The gas stove provided in this embodiment obtains the flame ion concentration of the fire cover through a flame ion sensor, and then obtains the flame ion current according to the flame ion concentration through a controller. When it is determined that the flame ion current is a changing value, the change curve of the flame ion current change value is compared with a preset curve; when the changing curve does not conform to the preset curve and the fluctuation range of the changing curve is within the preset range, the controller controls the blower to increase the primary air flow entering the ejector tube to adjust the ratio of gas to air, thereby achieving full combustion of the gas under any fire power state, and is not affected by changes in the external environment gas supply pressure, differences in gas composition, user adjustment of fire power and other usage scenarios, thereby reducing the content of harmful substances in the flue gas, improving the user's safety and health, and meeting the low-emission policy requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 A partial flow chart of a gas stove control method provided by an embodiment of the present invention; Figure 2 for Figure 1 Flow chart of the sub-steps of step S10; Figure 3 A curve diagram showing the change in flame ion current provided by an embodiment of the present invention; Figure 4 A flow chart showing another part of the gas stove control method provided by an embodiment of the present invention; Figure 5 This is a structural diagram of a gas stove provided by an embodiment of the present invention.

[0019] Icons: 100-gas stove; 10-burner base; 20-fire cover; 21-inner ring fire cover; 22-outer ring fire cover; 30-flame ion sensor; 31-inner ring flame ion sensing part; 32-outer ring flame ion sensing part; 40-intake system; 41-ejector pipe; 411-inner ring ejector pipe; 412-outer ring ejector pipe; 42-injection pipe; 421-inner ring injection pipe; 422-outer ring injection pipe; 43-gas flowmeter; 431-inner ring gas flowmeter; 432-outer ring gas flowmeter; 44-blower; 441-inner ring blower; 442-outer ring blower; 45-gas valve; 46-intake pipe; 50-controller. DETAILED DESCRIPTION

[0020] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0021] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort shall fall within the scope of protection of the present invention.

[0022] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0023] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" and the like indicate positions or locations based on the positions shown in the accompanying drawings, or the positions or locations in which the inventive product is typically placed when in use. These terms are intended solely to facilitate the description of the present invention and to simplify the description, and are not intended to indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third," etc., are used solely to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0024] Furthermore, terms such as "horizontal" and "vertical" do not necessarily mean that a component must be absolutely horizontal or overhanging, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but rather that it can be slightly tilted.

[0025] In the description of the present invention, it should also be noted that, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to mechanical connections or electrical connections; they may refer to direct connections or indirect connections through an intermediate medium; and they may refer to internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0026] As described in the background technology, to reduce pollutant emissions in flue gas, existing technologies typically optimize the ejector structure to introduce a more reasonable air ratio and promote the full combustion process. However, the test conditions underlying this approach are typically standard laboratory environments. In actual applications, if the composition or gas supply pressure in a user's home changes, or if the combustion system fails to adapt to these changes in operating conditions during the process of adjusting the stove's firepower, the flame combustion state may deviate from the optimal combustion conditions, resulting in incomplete combustion and an increase in the content of harmful substances in the flue gas. This not only affects the user's safety and health, but also makes it difficult to meet policy requirements for low-emission, environmentally friendly stove products.

[0027] Based on this, please refer to Figure 1-Figure 5 The embodiments of the present invention provide a gas stove control method and gas stove 100 that effectively address the aforementioned technical issues. Specifically, they enable full combustion at any power level, reduce the content of harmful substances in the flue gas, improve user safety and health, and meet low-emission policy requirements. The gas stove control method and gas stove 100 are described in detail below.

[0028] Please refer to Figure 1 , Figure 1 This is a partial flow chart of the gas stove control method provided in this embodiment, combined with Figure 1 , the gas stove control method includes: Step S10: obtaining flame ion current; Step S20: determining whether the flame ion current is a stable value or a changing value; Step S30: If the flame ion current is a changing value, determining whether a curve of the flame ion current changing value conforms to a preset curve; Step S40: If the change curve conforms to the preset curve, the current air flow rate of the gas stove 100 is maintained; Step S51: If the change curve does not conform to the preset curve, determine whether the fluctuation range of the change curve is within the preset range; Step S42: If the fluctuation range of the change curve is within the preset range, the air flow rate of the gas stove 100 is increased.

[0029] It should be noted that the step S10 of obtaining the flame ion current mainly utilizes the conductive principle of the flame itself to form a current signal. Figure 2 , Figure 2 for Figure 1 The flowchart of the sub-steps of step S10 in FIG. Figure 1 and Figure 2 , step S10 includes: Sub-step S11: obtaining flame ion concentration; Sub-step S12: Obtaining the flame ion current according to the flame ion concentration.

[0030] That is, by continuously detecting the flame ion concentration, then amplifying and filtering the flame ion concentration, the flame ion current is obtained. During the use of the gas stove 100, due to the user's operation and the influence of the external environment, the gas flow rate and the air flow rate will change, causing the flame ion concentration and the flame ion current to change. After a period of recording, a curve of the flame ion current change can be formed. For details, please refer to Figure 3 , Figure 3 That is, the flame ion current variation value provided in this embodiment is a variation curve diagram over a period of time. The above-mentioned preset curve is an ideal curve formed by the flame ion current variation value when the gas is fully burned.

[0031] It is easy to understand that by comparing the change curve of the flame ion current change value with the preset curve, when the change curve conforms to the preset curve, the current air flow of the gas stove 100 is maintained; and when the change curve does not conform to the preset curve, it is further judged whether the fluctuation range of the change curve is within the preset range. If the fluctuation range is within the preset range, the current air flow of the gas stove 100 is increased to adjust the ratio of gas to air, so that the gas can be fully burned under any fire state, and is not affected by changes in the external environment gas supply pressure, differences in gas composition, user adjustment of fire power and other usage scenarios, thereby reducing the content of harmful substances in the flue gas, improving the user's safety and health, and meeting the low-emission policy requirements.

[0032] That is, when the variation curve of the flame ion current does not conform to the preset curve, it is necessary to further determine whether the fluctuation range of the variation curve of the flame ion current is within the preset range. If it is within the preset range, it indicates that the fluctuation effect of the user's operation or the external environment on the flame combustion meets the expected requirements, that is, the combustion state is adjustable within the preset range. At this time, by increasing the air flow of the gas stove 100, the ratio of air to gas is adjusted to reduce the fluctuation range or fluctuation amplitude of the variation curve of the flame ion current. Then, the variation curve of the flame ion current is further determined to conform to the preset curve. Through continuous adjustment, a closed loop is formed until the variation curve of the flame ion current conforms to the preset curve, achieving the optimal flame combustion state, thereby reducing the content of harmful substances and improving the safety and health of users.

[0033] Please continue to combine Figure 1 After step S51, the gas stove control method further includes: Step S60: If the fluctuation range of the variation curve is not within the preset range, an alarm signal is output.

[0034] It should be noted that when the fluctuation range of the flame ion current change curve is not within the preset range, it means that the gas stove 100 may have flame separation or backfire. At this time, an alarm signal is output to remind the user to pay attention and immediately close the gas valve 45 to ensure safe use.

[0035] Furthermore, after step S60, the gas stove control method further includes: Step S70: If the acquired gas flow rate is zero within the first preset time period, stop outputting the alarm signal; Step S80: If the first preset time period is exceeded and the obtained gas flow rate is not zero, the gas valve 45 is closed and the output of the alarm signal is stopped.

[0036] like Figure 3 As shown, it should be noted that the first preset time length can be Figure 3 The time period between T1 and T2 is shown in FIG. That is, at time T1, the gas stove 100 may have experienced flame separation or flashback, and output an alarm signal to alert the user. If the gas flow rate obtained during the time period T1-T2 is zero, it indicates that the user has manually closed the gas valve 45, and the alarm signal is stopped, clearing the alarm.

[0037] However, if the user is not near the gas stove 100, does not hear the alarm, and does not take any measures, there will be a greater safety hazard. In order to improve the safety of the gas stove 100, by setting step S70, when the first preset time is exceeded, that is, after Figure 3 After time T2, the obtained gas flow is still not zero, indicating that the user has not manually closed the gas valve 45, posing a safety hazard of gas leakage. The gas valve 45 is automatically closed in step S80 to achieve automatic flameout protection, thereby improving safety of use.

[0038] It should be noted that during the actual use of the gas stove 100, the flame may suddenly go out, causing the value of the flame ion current to drop significantly, which is abnormal. At this time, the gas is still outputting, but there is no flame burning. In order to solve this safety hazard and further improve the safety of the gas stove 100, please refer to Figure 4 , Figure 4 This is another part of the flow chart of the gas stove control method provided in this embodiment, combined with Figure 1 and Figure 4 After step S20, the gas stove control method further includes: Step S90: If the flame ion current is a stable value, determining whether the flame ion current stable value is lower than a stable preset current value; Step S100: If the flame ion current stable value is not lower than the stable preset current value, then maintain the current state; Step S100: If the flame ion current stable value is lower than the stable preset current value, an alarm signal is output.

[0039] It should be noted that the stable preset current value can be understood as the flame ion current value obtained when the gas stove 100 suddenly goes out; and the aforementioned maintaining the current state can be understood as the current air flow rate of the gas stove 100. In other words, during actual use, by monitoring the flame ion current in real time, when its stable current value falls below the stable preset current value, it indicates that the gas stove 100 has suddenly gone out. At this time, an alarm signal is output to alert the user to the flameout problem and the need for immediate action, such as manually closing the gas valve 45, to ensure safe use.

[0040] Of course, since the flame ion current is obtained through the flame ion concentration, in some other embodiments, it is also possible to directly determine whether the gas stove 100 suddenly goes out by judging whether the flame ion concentration is lower than a preset concentration.

[0041] Furthermore, after step S110, the gas stove control method further includes: Step S120: If the acquired gas flow rate is zero within the second preset time period, stop outputting the alarm signal; Step S130: If the second preset time period is exceeded and the obtained gas flow rate is not zero, the gas valve 45 is closed and the output of the alarm signal is stopped.

[0042] Likewise, please combine Figure 3 , the second preset duration can be Figure 3 The time period between T3 and T4 is shown in FIG. That is, at time T3, the gas stove 100 goes out and outputs an alarm signal to alert the user. If the gas flow rate obtained during the time period T3-T4 is zero, it indicates that the user has manually closed the gas valve 45, and thus the alarm signal stops being output, clearing the alarm.

[0043] If the user is not near the gas stove 100, does not hear the alarm, and has not taken any measures, there will be a greater safety hazard. In order to improve the safety of the gas stove 100, by setting step S130, when the second preset time is exceeded, that is, after Figure 3 After time T4, the obtained gas flow is still not zero, indicating that the user has not manually closed the gas valve 45, posing a safety hazard of gas leakage. By automatically closing the gas valve 45 in step S120, automatic flameout protection can be achieved, thereby improving safety of use.

[0044] It should be noted that some gas stoves 100 have outer ring and inner ring combustion modes. In order to improve the fullness of gas combustion, the combustion of the inner ring flame and the combustion of the outer ring flame can be controlled separately, that is, the flame ion current of the inner ring and the flame ion current of the outer ring are obtained separately to ensure that the inner ring and the outer ring can achieve full combustion when they are used for combustion at the same time.

[0045] Please refer to Figure 5 , Figure 5 The structural diagram of the gas stove 100 provided in this embodiment is shown in FIG. Figure 5 The gas stove 100 includes a burner base 10 , a fire cover 20 , a flame ion sensor 30 , an air intake system 40 and a controller 50 .

[0046] Specifically, the fire cover 20 is mounted on the burner base 10, and the flame ion sensor 30 is mounted on the burner base 10 and is used to obtain the flame ion concentration of the fire cover 20. The air intake system 40 includes an ejector pipe 41, an injection pipe 42, and a blower 44. The ejector pipe 41 is connected to the burner base 10, the injection pipe 42 is in communication with the ejector pipe 41, and the blower 44 is used to deliver air into the ejector pipe 41. The controller 50 is electrically connected to both the flame ion sensor 30 and the blower 44 and is used to obtain the flame ion current based on the flame ion concentration. The controller 50 is also used to determine whether the flame ion current value is stable and whether the variation curve of the value conforms to a preset curve. If the variation curve does not conform to the preset curve and the fluctuation range of the variation curve is within the preset range, the controller 50 is used to control the blower 44 to increase the primary air flow entering the ejector pipe 41.

[0047] That is to say, the gas stove 100 obtains the flame ion concentration of the fire cover 20 through the flame ion sensor 30, and then obtains the flame ion current according to the flame ion concentration through the controller 50. When it is judged that the flame ion current is a changing value, the change curve of the flame ion current change value is compared with the preset curve; when the changing curve does not conform to the preset curve and the fluctuation range of the changing curve is within the preset range, the controller 50 controls the blower 44 to increase the primary air flow entering the ejector tube 41 to adjust the ratio of gas to air, so as to achieve full combustion of the gas under any fire power state, and is not affected by changes in the external environment gas supply pressure, differences in gas composition, user adjustment of fire power and other usage scenarios, thereby reducing the content of harmful substances in the flue gas, improving the user's safety and health, and meeting the low emission policy requirements.

[0048] In this embodiment, the fire cover 20 includes an inner ring fire cover 21 and an outer ring fire cover 22, and the flame ion sensor 30 includes an inner ring flame ion sensing part 31 and an outer ring flame ion sensing part 32. The inner ring flame ion sensing part 31 is arranged between the inner ring fire cover 21 and the outer ring fire cover 22, and is used to obtain the flame ion concentration of the inner ring fire cover 21; the outer ring flame ion sensing part 32 is arranged at an interval on the side of the outer ring fire cover 22 away from the inner ring fire cover 21, and is used to obtain the flame ion concentration of the outer ring fire cover 22.

[0049] The ejector tube 41 includes an inner ring ejector tube 411 and an outer ring ejector tube 412. The inner ring ejector tube 411 cooperates with the inner ring fire cover 21, and the outer ring ejector tube 412 cooperates with the outer ring fire cover 22. The injection tube 42 includes an inner ring injection tube 421 and an outer ring injection tube 422. The inner ring injection tube 421 and the outer ring injection tube 422 are connected to the inner ring ejector tube 411 and the outer ring ejector tube 412 respectively.

[0050] The blower 44 includes an inner ring blower 441 and an outer ring blower 442 . The inner ring blower 441 cooperates with the inner ring ejector tube 411 , and the outer ring blower 442 cooperates with the outer ring ejector tube 412 .

[0051] The controller 50 is electrically connected to the inner ring flame ionization sensing portion 31 , the outer ring flame ionization sensing portion 32 , the inner ring blower 441 and the outer ring blower 442 at the same time.

[0052] Through the above-mentioned setting, the controller 50 can be used to independently control the inner ring flame and the outer ring flame, ensuring that when the inner ring and the outer ring are simultaneously fed with gas for use, both can achieve the effect of full combustion. That is to say, when the change curve of the inner ring flame ion current does not conform to the preset curve, and the fluctuation range of the inner ring flame ion current change curve is within the preset range, the inner ring blower 441 is controlled to increase the air flow entering the inner ring ejector tube 411, thereby adjusting the ratio of gas and air entering the inner ring fire cover 21; and when the change curve of the outer ring flame ion current does not conform to the preset curve, and the fluctuation range of the outer flame ion current change curve is within the preset range, the outer ring blower 442 is controlled to increase the air flow entering the outer ring ejector tube 412, thereby adjusting the ratio of gas and air entering the outer ring fire cover 22.

[0053] Furthermore, to better regulate and control the gas flow, the air intake system 40 further includes a gas valve 45 and an air intake pipe 46. The gas valve 45 is connected to both the inner ring injection pipe 421 and the outer ring injection pipe 422. The air intake pipe 46 is connected to the gas valve 45. A controller 50 is electrically connected to the gas valve 45. It is readily understood that, based on the relevant parameters or signals detected by the inner ring flame ionization sensing unit 31 and the outer ring flame ionization sensing unit 32, the controller 50 can control the opening of the gas valve 45, thereby adjusting the flow of gas entering the inner ring injection pipe 421 and the outer ring injection pipe 422, respectively, through the air intake pipe 46. Of course, the controller 50 can also control the opening or closing of the gas valve 45 to provide flameout protection for the gas stove 100.

[0054] Furthermore, to facilitate observation of the gas flow rate within the injection pipe 42, the intake system 40 further includes a gas flow meter 43, which is disposed on the injection pipe 42. Specifically, in this embodiment, the gas flow meter 43 includes an inner ring gas flow meter 431 and an outer ring gas flow meter 432. The inner ring gas flow meter 431 is disposed on the inner ring injection pipe 421, and the outer ring gas flow meter 432 is disposed on the outer ring injection pipe 422.

[0055] Please continue to combine Figure 5Optionally, the distance between the flame ionization sensor 30 and the flame hole of the flame cover 20 is 1 mm to 6 mm. For example, the distance between the two can be 1 mm, 2 mm, 3 mm, 4 mm, 5 mm, or 6 mm. Within this range, the accuracy of the flame ion concentration detected by the flame ionization sensor 30 is high.

[0056] Specifically in this embodiment, the distance between the inner ring flame ionization sensing portion 31 and the fire hole of the inner ring fire cover 21 is 1 mm to 6 mm; the distance between the outer ring flame ionization sensing portion 32 and the fire hole of the outer ring fire cover 22 is also 1 mm to 6 mm.

[0057] It should be noted that the gas stove control method provided in this embodiment can be implemented using the gas stove 100; of course, the gas stove control method can also be implemented using other gas stoves.

[0058] In summary, an embodiment of the present invention provides a gas stove control method and a gas stove 100. The gas stove control method includes: obtaining a flame ion current, determining whether the flame ion current is a stable value or a changing value, and if the flame ion current is a changing value, determining whether a change curve of the flame ion current change value conforms to a preset curve; if the change curve conforms to the preset curve, maintaining the current air flow of the gas stove 100; if the change curve does not conform to the preset curve, determining whether the fluctuation range of the change curve is within a preset range; if the fluctuation range of the change curve is within the preset range, increasing the air flow of the gas stove 100.

[0059] It is easy to understand that the preset curve is an ideal curve formed by the change value of the flame ion current when the gas is fully burned. By comparing the change curve of the flame ion current change value with the preset curve, when the change curve conforms to the preset curve, the current air flow of the gas stove 100 is maintained; and when the change curve does not conform to the preset curve, it is further judged whether the fluctuation range of the change curve is within the preset range. If the fluctuation range is within the preset range, the current air flow of the gas stove 100 is increased to adjust the ratio of gas to air, so as to achieve full combustion of the gas under any fire state, and is not affected by changes in the external environment gas supply pressure, differences in gas composition, user adjustment of fire power and other usage scenarios, thereby reducing the content of harmful substances in the flue gas, improving user safety and health, and meeting the low emission policy requirements.

[0060] The gas stove 100 obtains the flame ion concentration of the fire cover 20 through the flame ion sensor 30, and then obtains the flame ion current according to the flame ion concentration through the controller 50. When it is determined that the flame ion current is a changing value, the change curve of the flame ion current change value is compared with the preset curve; when the change curve does not conform to the preset curve and the fluctuation range of the change curve is within the preset range, the controller 50 controls the blower 44 to increase the primary air flow entering the ejector tube 41 to adjust the ratio of gas to air, so as to achieve full combustion of the gas under any fire power state, and is not affected by changes in the external environment gas supply pressure, differences in gas composition, user adjustment of fire power and other usage scenarios, thereby reducing the content of harmful substances in the flue gas, improving the user's safety and health, and meeting the low emission policy requirements.

[0061] The foregoing description is merely a specific embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A gas stove control method, characterized in that: include: Obtain flame ion current; determining whether the flame ion current is a stable value or a changing value; If the flame ion current is a changing value, determining whether a changing curve of the flame ion current changing value conforms to a preset curve; If the change curve conforms to the preset curve, the current air flow rate of the gas stove (100) is maintained; If the change curve does not conform to the preset curve, determining whether the fluctuation range of the change curve is within the preset range; If the fluctuation range of the variation curve is within the preset range, the air flow rate of the gas stove (100) is increased.

2. The gas stove control method according to claim 1, characterized in that: After the step of determining whether the fluctuation range of the change curve is within a preset range, the gas stove control method further includes: If the fluctuation range of the change curve is not within the preset range, an alarm signal is output.

3. The gas stove control method according to claim 2, characterized in that: After the step of outputting an alarm signal if the fluctuation range of the variation curve is not within the preset range, the gas stove control method further includes: If the gas flow rate is zero within the first preset time period, the alarm signal is stopped from being output; If the first preset time period is exceeded and the obtained gas flow rate is not zero, the gas valve (45) is closed and the output of the alarm signal is stopped.

4. The gas stove control method according to claim 1, characterized in that: After the step of determining whether the flame ion current is a stable value or a changing value, the gas stove control method further includes: If the flame ion current is a stable value, determining whether the flame ion current stable value is lower than a stable preset current value; If the flame ion current stable value is not lower than the stable preset current value, then maintain the current state; If the flame ion current stable value is lower than the stable preset current value, an alarm signal is output.

5. The gas stove control method according to claim 4, characterized in that: After the step of outputting an alarm signal if the flame ion current is lower than the stable preset current value, the gas stove control method further includes: If the acquired gas flow rate is zero within the second preset time period, the alarm signal is stopped from being output; If the second preset time period is exceeded and the obtained gas flow rate is not zero, the gas valve (45) is closed and the output of the alarm signal is stopped.

6. The gas stove control method according to any one of claims 1 to 5, characterized in that: The step of obtaining the flame ion current comprises: Get the flame ion concentration; The flame ion current is obtained according to the flame ion concentration.

7. A gas stove, characterized in that: include: Burner seat (10); A fire cover (20), the fire cover (20) being arranged on the burner base (10); A flame ion sensor (30), the flame ion sensor (30) being arranged on the burner head base (10) and being used to obtain the flame ion concentration of the fire cover (20); An air intake system (40), the air intake system (40) comprising an ejector pipe (41), an injection pipe (42), and a blower (44), the ejector pipe (41) being connected to the burner base (10), the injection pipe (42) being in communication with the ejector pipe (41), and the blower (44) being used to transport primary air into the ejector pipe (41); and A controller (50) is electrically connected to the flame ion sensor (30) and the blower (44) and is used to obtain a flame ion current based on the flame ion concentration. The controller (50) is also used to determine whether the flame ion current value is stable and whether a change curve of the change value conforms to a preset curve. If the change curve does not conform to the preset curve and the fluctuation range of the change curve is within a preset range, the controller (50) is used to control the blower (44) to increase the primary air flow entering the ejector tube (41).

8. The gas stove according to claim 7, characterized in that: The fire cover (20) includes an inner ring fire cover (21) and an outer ring fire cover (22), and the flame ion sensor (30) includes an inner ring flame ion sensing portion (31) and an outer ring flame ion sensing portion (32), wherein the inner ring flame ion sensing portion (31) is arranged between the inner ring fire cover (21) and the outer ring fire cover (22) and is used to obtain the flame ion concentration of the inner ring fire cover (21); the outer ring flame ion sensing portion (32) is arranged at a distance from the inner ring fire cover (21) on a side of the outer ring fire cover (22) and away from the inner ring fire cover (21), and is used to obtain the flame ion concentration of the outer ring fire cover (22); The ejector tube (41) includes an inner ring ejector tube (411) and an outer ring ejector tube (412), wherein the inner ring ejector tube (411) cooperates with the inner ring fire cover (21), and the outer ring ejector tube (412) cooperates with the outer ring fire cover (22); the injection tube (42) includes an inner ring injection tube (421) and an outer ring injection tube (422), wherein the inner ring injection tube (421) and the outer ring injection tube (422) are respectively connected to the inner ring ejector tube (411) and the outer ring ejector tube (412); The blower (44) comprises an inner ring blower (441) and an outer ring blower (442), wherein the inner ring blower (441) cooperates with the inner ring ejector tube (411), and the outer ring blower (442) cooperates with the outer ring ejector tube (412); The controller (50) is electrically connected to the inner ring flame ion sensing unit (31), the outer ring flame ion sensing unit (32), the inner ring blower (441), and the outer ring blower (442) at the same time.

9. The gas stove according to claim 8, characterized in that: The air intake system (40) further includes a gas valve (45) and an air intake pipe (46), wherein the gas valve (45) is connected to both the inner ring injection pipe (421) and the outer ring injection pipe (422), the air intake pipe (46) is connected to the gas valve (45), and the controller (50) is electrically connected to the gas valve (45).

10. The gas stove according to claim 7, characterized in that: The distance between the flame ion sensor (30) and the fire hole of the fire cover (20) is 1 mm to 6 mm.

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