Gas stove flame stability evaluation method

Abstract

The invention relates to a method for evaluating the flame stability of a gas stove, which comprises the following steps of: pre-constructing a flame stability evaluation model for evaluating the flame stability of the gas stove, and setting a plurality of flame characteristic parameter quantitative indexes for representing the flame stability characteristics of the gas stove as the input of the flame stability evaluation model; the output of the flame stability evaluation model is a flame stability index representing the flame stability of the gas stove, then obtaining a plurality of flame characteristic parameters of flames generated when the gas stove works, and calculating corresponding flame characteristic parameter quantitative indexes; inputting the plurality of flame characteristic parameter quantitative indexes into a flame stability evaluation model for processing to obtain a flame stability index, and finally evaluating the flame stability of the current gas stove based on the flame stability index. Therefore, the influence of external environment interference on the flame stability of the gas stove is fully considered, the abnormal flame change of the flame caused by the external environment interference is captured in the first time, and the flame stability of the gas stove is accurately and timely evaluated.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of gas stoves, in particular to a gas stove flame stability evaluation method. BACKGROUND

[0002] As a common kitchen equipment, the gas stove mainly transmits heat to the outside through the flame generated by the combustion of gas. The heat transfer performance of the gas stove is affected by the flame stability to a great extent. Therefore, it is very important to evaluate the flame stability of the gas stove for mastering the performance of the gas stove and optimizing the structure of the gas stove.

[0003] In order to evaluate the stability of the gas stove, the flame color of the gas stove is usually observed by artificial visual inspection at present, so as to evaluate the flame stability based on the observed flame color.

[0004] In order to more accurately evaluate the flame stability of the gas stove, the Chinese invention patent application CN108662622A discloses a flame detection system of a gas stove, the gas stove is provided with a burner and a gas control valve, the flame detection system comprises a temperature sensor, a light signal assembly and a stove master control unit; the temperature sensor and the gas control valve are independent of each other; the temperature sensor is used for detecting the temperature Tt of the flame at the burner; the light signal assembly is used for detecting the brightness Ft of the flame; the stove master control unit is used for detecting whether the gas stove is successfully ignited according to the temperature Tt of the flame and / or the brightness Ft of the flame, and detecting whether the flame burns sufficiently according to the brightness Ft of the flame. In this way, the influence of the temperature sensor on ignition due to temperature sensing problem is eliminated, and whether the gas stove is ignited and whether the flame burns sufficiently are accurately detected.

[0005] However, the existing flame stability evaluation method of the gas stove has the following disadvantages: the flame stability evaluation method of the gas stove based on artificial visual inspection depends on the visual inspection ability and experience of the artificial to a great extent, the visual inspection ability and experience of different visual inspection personnel are quite different, the transient fluctuation of the flame color cannot be quantified, the accuracy and uniformity of the evaluation result of the flame stability are affected; in addition, the flame detection method based on the flame temperature and the flame height fails to consider the external environmental disturbance caused by the air flow disturbance caused by the opening and closing of the cabinet door and the local oxygen deficiency caused by the shielding of the pot, cannot capture the abnormal change of the flame caused by the external environmental disturbance in the first time, and cannot evaluate the flame stability of the gas stove. SUMMARY

[0006] The technical problem to be solved by the present application is to provide a gas stove flame stability evaluation method which fully considers the external environmental disturbance and makes a comprehensive and accurate evaluation.

[0007] The technical scheme adopted by the present application to solve the above technical problems is: a gas stove flame stability evaluation method, characterized by comprising the following steps:

[0008] A flame stability evaluation model for evaluating the flame stability of a gas stove is constructed in advance; wherein the input of the flame stability evaluation model is a plurality of flame characteristic parameter quantitative indicators representing the flame stability characteristics of the gas stove, the plurality of flame characteristic parameter quantitative indicators have respective corresponding evaluation weights, and the output of the flame stability evaluation model is a flame stability index representing the flame stability of the gas stove;

[0009] A plurality of flame characteristic parameters of the flame generated when the gas stove is working are obtained, and the corresponding flame characteristic parameter quantitative indicators are calculated;

[0010] The plurality of flame characteristic parameter quantitative indicators calculated are input into the flame stability evaluation model for processing, and a flame stability index representing the current flame stability of the gas stove is obtained;

[0011] The flame stability of the current gas stove is evaluated based on the obtained flame stability index.

[0012] In the improved gas stove flame stability evaluation method, the flame stability evaluation model is constructed as follows:

[0013]

[0014] wherein SI is the flame stability index representing the flame stability of the gas stove, N represents the total number of flame characteristic parameter quantitative indicators representing the flame stability characteristics of the gas stove, S n is the nth flame characteristic parameter quantitative indicator representing the flame stability characteristics of the gas stove, and ω n is the evaluation weight corresponding to the flame characteristic parameter quantitative indicator S n .

[0015] Further, in the gas stove flame stability evaluation method, the plurality of flame characteristic parameter quantitative indicators include a flame shape stability quantitative indicator, a flame CH free radical radiation intensity quantitative indicator, a flame temperature gradient consistency quantitative indicator, a flame anti-interference quantitative indicator, and a flame response speed quantitative indicator from when the flame is disturbed to when it recovers to a stable state; wherein the flame shape stability quantitative indicator is marked as S1, the flame CH free radical radiation intensity quantitative indicator is marked as S2, the flame temperature gradient consistency quantitative indicator is marked as S3, the flame anti-interference quantitative indicator is marked as S4, and the flame response speed quantitative indicator is marked as S5.

[0016] Further improvement, in the gas stove flame stability evaluation method, the calculation method of the flame shape stability quantitative indicator is as follows:

[0017] acquire a flame profile point set of the gas stove flame;

[0018] According to the acquired flame profile point set, calculate the Hausdorff distance of the gas stove flame profile; wherein, the Hausdorff distance of the gas stove flame profile is calculated as follows:

[0019]

[0020] Wherein, δ H is the Hausdorff distance of the gas stove flame profile, represents the upper bound of the shortest distance from all flame profile points in set A to set B; represents the upper bound of the shortest distance from all flame profile points in set B to set A; both set A and set B are continuous frame flame profile point sets;

[0021] According to the obtained Hausdorff distance and the preset Hausdorff distance scoring method, the flame shape stability quantitative index of the current gas stove flame is obtained; wherein, the preset Hausdorff distance scoring method is as follows:

[0022]

[0023] Wherein, S1 is the flame shape stability quantitative index of the gas stove flame, represents the average value of all obtained Hausdorff distances.

[0024] Improved in the gas stove flame stability evaluation method, the calculation method of the flame CH free radical radiation intensity quantitative index is as follows:

[0025] Acquire a CH free radical radiation intensity sequence of the gas stove flame;

[0026] According to the acquired CH free radical radiation intensity sequence, calculate the CH free radical radiation intensity fluctuation value of the current gas stove flame; wherein, the CH free radical radiation intensity fluctuation value is marked as CV:

[0027]

[0028] Wherein, σ ch represents the standard deviation of the acquired CH free radical radiation intensity sequence, μ ch represents the average value of the acquired CH free radical radiation intensity sequence; the CH free radical radiation intensity fluctuation value is negatively correlated with the stability of the radiation intensity in the CH free radical radiation intensity sequence;

[0029] Based on the obtained CH radical radiation intensity fluctuation value of the gas stove flame and the preset CH radical radiation intensity fluctuation scoring method, a quantitative index of the current gas stove flame CH radical radiation intensity is obtained; wherein, the preset CH radical radiation intensity fluctuation scoring method is as follows:

[0030]

[0031] S2 is a quantitative index of the CH radical radiation intensity of the gas stove flame.

[0032] Further improvements are made to the gas stove flame stability evaluation method, where the flame temperature gradient consistency quantification index is calculated as follows:

[0033] Acquire temperature data at multiple points around the gas stove burner; the area around the gas stove burner consists of the inner ring and the outer ring, with 8 temperature points in the inner ring and 8 temperature points in the outer ring.

[0034] Based on the acquired temperature data, the temperature gradient value around the gas stove burner is calculated; the calculation method for the temperature gradient value around the gas stove burner is as follows:

[0035] △T max =max(|T i -T j |), i=1,2,…,8; j=1,2,…,8;

[0036] Among them, △T max It is the maximum temperature difference between any two points out of the eight points in the inner ring of the gas stove burner and the eight points out of the outer ring of the gas stove burner; T i T is the temperature value of the i-th point in the inner circle of the gas stove burner. j It is the temperature value of the j-th point in the outer ring of the gas stove burner;

[0037] Based on the obtained temperature gradient values ​​around the gas stove burner and the preset temperature gradient fluctuation scoring method, a quantitative index of the consistency of the current gas stove flame temperature gradient is obtained; the preset temperature gradient fluctuation scoring method is as follows:

[0038]

[0039] S3 is a quantitative index of the consistency of the flame temperature gradient of the gas stove flame.

[0040] Furthermore, in the gas stove flame stability evaluation method, the calculation method for the flame anti-interference quantitative index is as follows:

[0041]

[0042] Wherein, S4 is the quantitative index of the flame anti-interference of the gas stove flame, K is the total number of disturbance factors in the external environment that cause disturbance to the gas stove flame, and t' k Let t be the duration of the gas stove flame being disturbed by the kth disturbance factor. K ε represents the total duration of disturbances to the gas stove flame caused by K disturbance factors; k denoted as the weight of the k-th disturbance factor on the flame disturbance of the gas stove.

[0043] Furthermore, in the gas stove flame stability evaluation method, the calculation method for the flame response speed quantification index is as follows:

[0044]

[0045] S5 is a quantitative index of flame response speed, and Δt is the time it takes for the gas stove flame to recover from the occurrence of disturbance to a steady state.

[0046] The conditions for the gas stove flame to return to a steady state are: the fluctuation value (CV) of the CH radical radiation intensity ≤ 10%, and the Hausdorff distance δ of the gas stove flame profile. H ≤1.0mm, and the temperature gradient value △T around the gas stove burner. max ≤8℃.

[0047] Further improvements are made to the gas stove flame stability evaluation method, in the process of evaluating the current gas stove flame stability using the obtained flame stability index, the following settings are made: different flame stability indices correspond to different levels of flame stability intensity; wherein, the flame stability index value and the flame stability intensity are positively correlated.

[0048] Furthermore, in the gas stove flame stability evaluation method, the evaluation of the current gas stove flame stability based on the obtained flame stability index is carried out as follows:

[0049]

[0050] Compared with existing technologies, the advantages of this invention are as follows: The gas stove flame stability evaluation method of this invention pre-constructs a flame stability evaluation model for evaluating the flame stability of a gas stove, and sets multiple flame characteristic parameters as quantitative indicators characterizing the flame stability features of the gas stove as inputs to the flame stability evaluation model. The output of the flame stability evaluation model is a flame stability index characterizing the flame stability of the gas stove. Multiple flame characteristic parameters generated by the gas stove during operation are acquired, and the corresponding quantitative indicators are calculated. These calculated quantitative indicators are then input into the flame stability evaluation model for processing to obtain the flame stability index characterizing the current flame stability of the gas stove. Finally, the flame stability of the current gas stove is evaluated based on the obtained flame stability index. Thus, while fully considering the impact of external environmental interference on the flame stability of the gas stove, it captures abnormal flame changes caused by external environmental interference in real time, thereby achieving accurate and timely evaluation of the flame stability of the gas stove. Furthermore, it avoids the limitations of relying on manual visual inspection of flame color to evaluate the flame stability of the gas stove. Attached Figure Description

[0051] Figure 1 This is a flowchart illustrating the gas stove flame stability evaluation method in an embodiment of the present invention. Detailed Implementation

[0052] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0053] This embodiment provides a method for evaluating the flame stability of a gas stove. Specifically, see [link to documentation]. Figure 1 As shown, the gas stove flame stability evaluation method of this embodiment includes the following steps 1 to 4:

[0054] Step 1: Pre-construct a flame stability evaluation model for evaluating the flame stability of a gas stove; wherein, the input of the flame stability evaluation model is a quantitative index of multiple flame characteristic parameters that characterize the flame stability of the gas stove, and each of these multiple flame characteristic parameters has its own corresponding evaluation weight; the output of the flame stability evaluation model is a flame stability index that characterizes the flame stability of the gas stove.

[0055] Step 2: Obtain multiple flame characteristic parameters of the flame produced when the gas stove is working and calculate the corresponding flame characteristic parameter quantification index;

[0056] Step 3: Input the calculated quantitative indicators of multiple flame characteristic parameters into the flame stability evaluation model for processing, and obtain the flame stability index that characterizes the current flame stability of the gas stove.

[0057] Step 4: Evaluate the flame stability of the current gas stove based on the obtained flame stability index.

[0058] Specifically, in the gas stove flame stability evaluation method of this embodiment, the flame stability evaluation model for step 1 is constructed as follows:

[0059]

[0060] wherein SI is a flame stability index representing the flame stability of the gas stove, N represents the total number of flame characteristic parameter quantitative indexes representing the flame stability characteristics of the gas stove, S n is the nth flame characteristic parameter quantitative index representing the flame stability characteristics of the gas stove, and ω n is the evaluation weight corresponding to the flame characteristic parameter quantitative index S n .

[0061] For example, in this embodiment, the aforementioned multiple flame characteristic parameter quantitative indexes include a flame shape stability quantitative index, a flame CH free radical radiation intensity quantitative index, a flame temperature gradient consistency quantitative index, a flame anti-interference quantitative index, and a flame response speed quantitative index from when the flame is disturbed to when the flame recovers to a stable state; wherein the flame shape stability quantitative index is marked as S1, the flame CH free radical radiation intensity quantitative index is marked as S2, the flame temperature gradient consistency quantitative index is marked as S3, the flame anti-interference quantitative index is marked as S4, and the flame response speed quantitative index is marked as S5. Therefore, the flame stability evaluation model in this embodiment is specifically constructed as follows:

[0062] SI = ω1S1 + ω2S2 + ω3S3 + ω4S4 + ω5S5;

[0063] wherein SI is a flame stability index representing the flame stability of the gas stove, the evaluation weight ω1 = 0.25, the evaluation weight ω2 = 0.30, the evaluation weight ω3 = 0.20, the evaluation weight ω4 = 0.15, and the evaluation weight ω5 = 0.10.

[0064] Specifically, in the gas stove flame stability evaluation method of this embodiment, the specific calculation method of each flame characteristic parameter quantitative index is as follows:

[0065] I. The calculation method of the flame shape stability quantitative index S1 is as follows:

[0066] Step a1, obtaining a flame contour point set of the gas stove flame;

[0067] Step a2, calculating the Hausdorff distance of the gas stove flame contour according to the obtained flame contour point set; wherein the Hausdorff distance of the gas stove flame contour is calculated as follows:

[0068]

[0069] wherein, δ H is the Hausdorff distance of the gas stove flame profile, represents the upper bound of the shortest distance from all flame profile points in set A to set B; represents the upper bound of the shortest distance from all flame profile points in set B to set A; both set A and set B are continuous flame profile point sets of consecutive frames;

[0070] Step a3, according to the obtained Hausdorff distance and the preset Hausdorff distance scoring method, the flame shape stability quantitative index of the current gas stove flame is obtained.

[0071] For example, the preset Hausdorff distance scoring method is as follows:

[0072]

[0073] wherein, S1 is the flame shape stability quantitative index of the gas stove flame, represents the average value of all obtained Hausdorff distances.

[0074] II. The calculation method of the flame CH free radical radiation intensity quantitative index S2 is as follows:

[0075] Step b1, the CH free radical radiation intensity sequence of the gas stove flame is obtained;

[0076] Step b2, according to the obtained CH free radical radiation intensity sequence, the CH free radical radiation intensity fluctuation value of the current gas stove flame is calculated; wherein, the CH free radical radiation intensity fluctuation value is marked as CV:

[0077]

[0078] wherein, σ ch represents the standard deviation of the obtained CH free radical radiation intensity sequence, μ ch represents the average value of the obtained CH free radical radiation intensity sequence; the CH free radical radiation intensity fluctuation value is negatively correlated with the stability of the radiation intensity in the CH free radical radiation intensity sequence;

[0079] Step b3, according to the obtained CH free radical radiation intensity fluctuation value of the gas stove flame and the preset CH free radical radiation intensity fluctuation scoring method, the CH free radical radiation intensity quantitative index of the current gas stove flame is obtained. The preset CH free radical radiation intensity fluctuation scoring method is as follows:

[0080]

[0081] S2 is a quantitative index of the flame CH free radical radiation intensity of the gas stove flame; for example, when the CH free radical radiation intensity fluctuation value CV is less than or equal to 5%, it indicates that the flame stability of the gas stove flame is extremely stable, when the CH free radical radiation intensity fluctuation value 5% < CV < 10%, it indicates that the flame stability of the gas stove flame is stable, when the CH free radical radiation intensity fluctuation value 10% < CV < 20%, it indicates that the flame stability of the gas stove flame is critical stable, and when the CH free radical radiation intensity fluctuation value CV > 20%, it indicates that the flame stability of the gas stove flame is seriously unstable.

[0082] III. The calculation method of the flame temperature gradient consistency quantitative index S3 is as follows:

[0083] Step c1, obtaining temperature data of multiple points in the gas stove burner periphery; in this embodiment, the gas stove burner periphery is the inner circle of the gas stove burner and the outer circle of the gas stove burner, the inner circle of the gas stove burner has 8 temperature points, and the outer circle of the gas stove burner has 8 temperature points;

[0084] Step c2, calculating the gas stove burner periphery temperature gradient value according to the obtained temperature data; wherein the calculation method of the gas stove burner periphery temperature gradient value is as follows:

[0085] △T max = max (|T i -T j |), i = 1, 2, …, 8; j = 1, 2, …, 8;

[0086] Wherein, △T max is the maximum value of the temperature difference between any two points of the 8 points in the inner circle of the gas stove burner and the 8 points in the outer circle of the gas stove burner; T i is the temperature value of the i-th point in the inner circle of the gas stove burner, and T j is the temperature value of the j-th point in the outer circle of the gas stove burner;

[0087] Step c3, obtaining the flame temperature gradient consistency quantitative index of the current gas stove flame according to the obtained gas stove burner periphery temperature gradient value and the preset temperature gradient fluctuation scoring method. For example, in this embodiment, the preset temperature gradient fluctuation scoring method is as follows:

[0088]

[0089] Wherein, S3 is a quantitative index of the flame temperature gradient consistency of the gas stove flame.

[0090] IV. The calculation method of the flame anti-interference quantitative index S4 is as follows:

[0091]

[0092] wherein S4 is a flame anti-interference quantification index of the gas stove flame, K is a total number of disturbance factors in the external environment causing disturbance to the gas stove flame, t k is a duration of disturbance to the gas stove flame caused by the kth disturbance factor, t K is a total duration value of the durations of disturbance to the gas stove flame caused by the K disturbance factors; ε k is a weight of the kth disturbance factor on the disturbance to the gas stove flame. For example, in this embodiment, the external interference factors affecting the stability of the gas stove flame include background noise, lateral air flow, pressure drop and pot shielding (for example, the pot offset covers 30% of the fire hole area); for example: the background noise is the air flow of the range hood causing the flame brightness to fluctuate (the standard deviation of brightness is greater than 15% of the average value) or to slightly shake; the lateral air flow is that the flame is offset from the center of the fire hole by more than 2 cm or appears to be temporarily extinguished (the flame is separated from the fire hole but not extinguished); the pressure drop (or pressure step) is that after the pressure suddenly changes, the flame height drops by more than 30% or appears to be backfired (the flame is retracted into the fire hole); the pot shielding is set to the pot offset covering 30% of the fire hole area. In addition, the weight of the background noise on the disturbance to the gas stove flame is set to 30%, the weight of the lateral air flow on the disturbance to the gas stove flame is set to 40%, the weight of the pressure drop on the disturbance to the gas stove flame is set to 20%, and the weight of the pressure drop on the disturbance to the gas stove flame is set to 10%.

[0093] Five, the calculation method of the flame response speed quantification index S5 is as follows:

[0094]

[0095] wherein S5 is the flame response speed quantification index, Δt is the duration of the gas stove flame from the occurrence of interference to the recovery of the stable state; and in this embodiment, the conditions for the gas stove flame to recover to the stable state are that the CH free radical radiation intensity fluctuation value CV is less than or equal to 10%, and the Hausdorff distance δ H of the gas stove flame profile is less than or equal to 1.0 mm, and the temperature gradient value ΔT max of the gas stove fire hole periphery is less than or equal to 8℃.

[0096] It should be noted that in this embodiment, the following is set in the process of evaluating the current stability of the gas stove flame based on the obtained flame stability index: different flame stability indexes correspond to different levels of flame stability intensity; wherein the flame stability index value is positively correlated with the flame stability intensity.

[0097] Here is the way to evaluate the current stability of the gas stove flame based on the obtained flame stability index:

[0098]

[0099] Once the gas stove flame stability is evaluated, it indicates that the current gas stove structure design has defects, and subsequent structural improvements are needed.

[0100] The gas stove flame stability evaluation method in this embodiment pre-constructs a flame stability evaluation model for evaluating the gas stove flame stability, sets multiple flame characteristic parameter quantitative indicators representing the gas stove flame stability characteristics as the inputs of the flame stability evaluation model, and the output of the flame stability evaluation model is a flame stability index representing the gas stove flame stability. The multiple flame characteristic parameters of the flame generated when the gas stove is working are obtained, and the corresponding flame characteristic parameter quantitative indicators are calculated. Then, the calculated multiple flame characteristic parameter quantitative indicators are input into the flame stability evaluation model to obtain the flame stability index representing the current gas stove flame stability. Finally, the current gas stove flame stability is evaluated based on the obtained flame stability index. In this way, under the premise of fully considering the influence of external environmental interference on the gas stove flame stability, the abnormal changes of the flame caused by external environmental interference are captured in the first time, and the accurate and timely evaluation of the gas stove flame stability is realized. Moreover, the limitation problem of relying on manual visual inspection of flame color to evaluate the gas stove flame stability is avoided.

[0101] Although the preferred embodiments of the present application have been described in detail above, it should be understood that various modifications and changes can be made by those skilled in the art without departing from the spirit and principles of the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A method for evaluating the stability of a gas burner flame, characterized in that, The method comprises the following steps: a flame stability evaluation model for evaluating the flame stability of a gas stove is constructed in advance; wherein, the input of the flame stability evaluation model is a plurality of flame characteristic parameter quantitative indexes representing the flame stability characteristics of the gas stove, the plurality of flame characteristic parameter quantitative indexes have respective corresponding evaluation weights, and the output of the flame stability evaluation model is a flame stability index representing the flame stability of the gas stove; a plurality of flame characteristic parameters of the flame generated by the gas stove during operation are obtained, and corresponding flame characteristic parameter quantitative indexes are calculated; the calculated plurality of flame characteristic parameter quantitative indexes are input into the flame stability evaluation model for processing, so as to obtain the flame stability index representing the current flame stability of the gas stove; the flame stability of the current gas stove is evaluated based on the obtained flame stability index.

2. The gas burner flame stability evaluation method of claim 1, wherein The flame stability evaluation model is constructed as follows: Wherein, SI is a flame stability index representing the flame stability of the gas stove, N represents the total number of flame characteristic parameter quantitative indexes representing the flame stability characteristics of the gas stove, S n is the nth flame characteristic parameter quantitative index representing the flame stability characteristics of the gas stove, and ω n is the evaluation weight corresponding to the flame characteristic parameter quantitative index S n .

3. The gas burner flame stability evaluation method according to claim 2, characterized in that, The plurality of flame characteristic parameter quantitative indexes include a flame shape stability quantitative index, a flame CH free radical radiation intensity quantitative index, a flame temperature gradient consistency quantitative index, a flame anti-interference quantitative index, and a flame response speed quantitative index from the occurrence of interference to the recovery of stability; wherein, the flame shape stability quantitative index is marked as S1, the flame CH free radical radiation intensity quantitative index is marked as S2, the flame temperature gradient consistency quantitative index is marked as S3, the flame anti-interference quantitative index is marked as S4, and the flame response speed quantitative index is marked as S5.

4. The gas burner flame stability evaluation method according to claim 3, characterized in that, The calculation method of the flame shape stability quantitative index is as follows: a flame contour point set of the gas stove flame is obtained; the Hausdorff distance of the flame contour of the gas stove is calculated according to the obtained flame contour point set; the flame shape stability quantitative index of the current gas stove flame is obtained according to the obtained Hausdorff distance and a preset Hausdorff distance scoring method.

5. The gas burner flame stability evaluation method according to claim 4, characterized in that, The calculation method of the flame CH free radical radiation intensity quantitative index is as follows: a CH free radical radiation intensity sequence of the gas stove flame is obtained; the CH free radical radiation intensity fluctuation value of the current gas stove flame is calculated according to the obtained CH free radical radiation intensity sequence; the CH free radical radiation intensity quantitative index of the current gas stove flame is obtained according to the obtained CH free radical radiation intensity fluctuation value of the gas stove flame and a preset CH free radical radiation intensity fluctuation scoring method.

6. The gas burner flame stability evaluation method of claim 5, wherein The calculation method of the flame temperature gradient consistency quantitative index is as follows: temperature data of a plurality of points around the gas stove burner is obtained; the temperature gradient value around the gas stove burner is calculated according to the obtained temperature data; the flame temperature gradient consistency quantitative index of the current gas stove flame is obtained according to the obtained temperature gradient value around the gas stove burner and a preset temperature gradient fluctuation scoring method.

7. The gas burner flame stability evaluation method of claim 6, wherein The calculation method of the Hausdorff distance of the flame contour of the gas stove is as follows: wherein δ H is the Hausdorff distance of the gas stove flame profile, represents the upper bound of the shortest distance from all flame profile points in the set A to the set B; represents the upper bound of the shortest distance from all flame profile points in the set B to the set A; both set A and set B are continuous frame flame profile point sets; The preset Hausdorff distance scoring method is as follows: S1 is a quantitative index of the flame form stability of the gas stove flame, denotes the average of all Hausdorff distances obtained; The CH free radical radiation intensity fluctuation value is marked as CV: wherein σ ch represents the standard deviation of the acquired CH free radical radiation intensity sequence, μ ch represents the average value of the acquired CH free radical radiation intensity sequence; the CH free radical radiation intensity fluctuation value is negatively correlated with the stability of the radiation intensity in the CH free radical radiation intensity sequence; The preset CH free radical radiation intensity fluctuation scoring method is as follows: wherein, S2 is the flame CH free radical radiation intensity quantitative index of the gas stove flame. The gas stove fire hole periphery is a gas stove fire hole inner ring and a gas stove fire hole outer ring, the gas stove fire hole inner ring has 8 temperature points, and the gas stove fire hole outer ring has 8 temperature points; the calculation method of the temperature gradient value of the gas stove fire hole periphery is as follows: ΔT max = max(|T i - T j |), i = 1, 2,..., 8; j = 1, 2,..., 8; wherein, ΔT max is the maximum value of the temperature difference between any two points of the eight points in the inner circle of the gas stove burner and the eight points in the outer circle of the gas stove burner; T i is the temperature value of the i-th point in the inner circle of the gas stove burner, T j is the temperature value of the j-th point in the outer circle of the gas stove burner; The preset temperature gradient fluctuation scoring method is as follows: Wherein, S3 is the flame temperature gradient consistency quantization index of the gas stove flame.

8. The gas burner flame stability evaluation method of claim 7, wherein, The calculation method of the flame anti-interference quantization index is as follows: Wherein, S4 is the flame anti-interference quantification index of the gas stove flame, K is the total number of disturbance factors in the external environment causing the disturbance of the gas stove flame, t k is the duration of the disturbance of the gas stove flame caused by the kth disturbance factor, t K is the total duration value of the duration of the disturbance of the gas stove flame caused by the K disturbance factors; ε k is the weight of the kth disturbance factor on the disturbance of the gas stove flame. The calculation method of the flame response speed quantization index is as follows: Wherein, S5 is the flame response speed quantization index, and △t is the time length from the occurrence of disturbance to the recovery of the gas stove flame to the steady state; The condition for the gas stove flame to recover a steady state is that the CH free radical radiation intensity fluctuation value CV≤10%, and the Hausdorff distance δ of the gas stove flame profile H ≤1.0mm, and the gas stove flame port peripheral temperature gradient value ΔT max ≤8℃.

9. The gas burner flame stability evaluation method according to any one of claims 1 to 8, characterized in that, The following is set in the process of evaluating the current gas stove flame stability based on the obtained flame stability index: different flame stability indexes correspond to different levels of flame stability intensity; wherein, the flame stability index value is positively correlated with the flame stability intensity.

10. The gas burner flame stability evaluation method of claim 9, wherein, The following is the way to evaluate the current gas stove flame stability based on the obtained flame stability index:

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