Control method and control device of cooking device, storage medium and cooking device

Abstract

The application relates to the technical field of household appliances, and particularly discloses a control method and device of a cooking equipment, a storage medium and the cooking equipment, wherein the cooking equipment comprises a combustion chamber, the combustion chamber is provided with a burner and a steam generator, the method comprises the following steps: obtaining combustion state information of the burner in an operation process and environment state information of the combustion chamber; determining a flame state of the burner according to the combustion state information and the environment state information; and controlling at least one of the burner and the steam generator according to the flame state, so as to maintain the burner in a safe and stable operation state. According to the control method, the combustion state of the burner and the environment information of the combustion chamber are obtained in real time, the flame state is determined after fusion analysis, the burner or the steam generator is intelligently controlled according to the flame state, the burner is ensured to be always in a safe and stable operation state, the reliability and the service life of detection can be improved in a high-humidity environment, and the environment change is self-adapted.

Description

Technical Field

[0001] This invention relates to the field of household appliance technology, and in particular to a control method for a cooking device, a computer-readable storage medium, a control device for a cooking device, and a cooking device. Background Technology

[0002] Currently, wet combustion technology, as an effective means to reduce the formation of nitrogen oxides during gas combustion, has been widely used in recent years in fields such as new gas-fired steam ovens. By mixing atomized droplets with fuel and air, the endothermic effect of water mist evaporation is used to reduce the peak flame temperature, thereby suppressing the formation of thermal nitrogen oxides.

[0003] While improving environmental performance, the introduction of water mist also significantly complicates the combustion environment. The high-temperature, high-humidity, and multiphase flow field environment formed within the combustion chamber poses a severe challenge to current combustion status monitoring methods. Related technologies generally rely on single or a few sensors, such as ion flame detectors, ultraviolet / infrared optical sensors, or thermocouples, for status determination. However, ion probes are prone to scaling and corrosion in high-temperature and high-humidity environments, leading to signal drift or even failure; optical sensor lenses are easily obscured by steam and oil, resulting in serious false alarms or missed alarms; and thermocouples have inherent defects such as response lag and the ability to only reflect localized temperature points. Summary of the Invention

[0004] This invention aims to at least partially solve one of the technical problems in related technologies. Therefore, the first objective of this invention is to propose a control method for cooking equipment. This method acquires real-time combustion status and combustion chamber environmental information of the burner, integrates and analyzes this information to determine the flame state, and intelligently controls the burner or steam generator accordingly. This ensures that the burner is always in a safe and stable operating state, improves the reliability and lifespan of detection in high humidity environments, significantly enhances the accuracy and reliability of flame state judgment, ensures safe, efficient, and environmentally friendly operation of the equipment, and adapts to environmental changes.

[0005] A second objective of this invention is to provide a computer-readable storage medium.

[0006] The third objective of this invention is to provide a control device for a cooking apparatus.

[0007] The fourth objective of this invention is to provide a cooking device.

[0008] To achieve the above objectives, a first aspect of the present invention provides a control method for a cooking device, the cooking device including a combustion chamber, the combustion chamber being equipped with a burner and a steam generator, the method including: acquiring combustion state information of the burner during operation and environmental state information of the combustion chamber; determining the flame state of the burner based on the fusion of the combustion state information and the environmental state information; and controlling at least one of the burner and the steam generator based on the flame state to maintain the burner in a safe and stable operating state.

[0009] A control method for a cooking device according to an embodiment of the present invention includes: acquiring combustion state information of a burner during operation and environmental state information of the combustion chamber; determining the flame state of the burner based on the fusion of the combustion state information and the environmental state information; and controlling at least one of the burner and the steam generator based on the flame state to maintain the burner in a safe and stable operating state. Thus, this method, by acquiring the combustion state of the burner and the environmental information of the combustion chamber in real time, fusing and analyzing them to determine the flame state, and intelligently controlling the burner or the steam generator accordingly, ensures that the burner is always in a safe and stable operating state. It can improve the reliability and lifespan of detection in high humidity environments, significantly improve the accuracy and reliability of flame state judgment, ensure safe, efficient, and environmentally friendly operation of the equipment, and adapt to environmental changes.

[0010] In addition, the control method of the cooking device according to the above embodiments of the present invention may also have the following additional technical features:

[0011] According to some embodiments of the present invention, the combustion state information includes flame intensity, noise intensity, combustion temperature and combustion temperature change rate, and the environmental state information includes ambient humidity.

[0012] According to some embodiments of the present invention, the flame state of the burner is determined by fusing combustion state information and environmental state information, including: determining basic weighting coefficients for flame intensity, noise intensity, and combustion temperature based on ambient humidity; adjusting the basic weighting coefficients based on the rate of change of flame intensity, noise intensity, and combustion temperature to obtain adjusted comprehensive weighting coefficients for flame intensity, noise intensity, and combustion temperature; normalizing the flame intensity, noise intensity, and combustion temperature; and determining the flame state of the burner based on the normalized flame intensity, noise intensity, combustion temperature, and comprehensive weighting coefficients.

[0013] According to some embodiments of the present invention, the flame intensity, noise intensity, and combustion temperature are normalized, including: obtaining an upper limit value for flame intensity, an upper limit value for noise intensity, an upper limit value for combustion temperature, and a lower limit value for combustion temperature; using the ratio between the flame intensity and the upper limit value for flame intensity as the normalized result of the flame intensity normalization process; using the ratio between the noise intensity and the upper limit value for noise intensity as the normalized result of the noise intensity normalization process; and using the ratio between a first difference between the combustion temperature and the lower limit value for combustion temperature and a second difference between the upper limit value for combustion temperature and the lower limit value for combustion temperature as the normalized result of the combustion temperature normalization process.

[0014] According to some embodiments of the present invention, determining the flame state of a burner based on normalized flame intensity, noise intensity, combustion temperature, and a comprehensive weighting coefficient includes: multiplying each of the normalized flame intensity, noise intensity, and combustion temperature by its corresponding comprehensive weighting coefficient and summing them to obtain a first sum; summing the corresponding comprehensive weighting coefficients of the flame intensity, noise intensity, and combustion temperature to obtain a second sum; and determining the flame state of the burner based on the ratio between the first sum and the second sum.

[0015] According to some embodiments of the present invention, determining the flame state of the burner based on the ratio between a first sum and a second sum includes: determining the flame state as a normal combustion state when the ratio between the first sum and the second sum is greater than a preset first threshold and the rate of change of the ratio between the first sum and the second sum is less than a preset rate of change; determining the flame state as an incomplete combustion state when the ratio between the first sum and the second sum is greater than a preset second threshold and less than or equal to a preset first threshold, or when the rate of change of the ratio between the first sum and the second sum is greater than or equal to a preset rate of change; and determining the flame state as a flameout state when the ratio between the first sum and the second sum is less than or equal to a preset second threshold and the duration is greater than a preset duration.

[0016] According to some embodiments of the present invention, controlling at least one of the burner and the steam generator according to the flame state includes: maintaining the current operating parameters of the burner and the steam generator when the flame state is a normal combustion state; increasing the air damper of the burner or decreasing the operating power of the steam generator when the flame state is an incomplete combustion state; and closing the gas valve of the burner and triggering an alarm when the flame state is a flameout state.

[0017] To achieve the above objectives, a second aspect of the present invention provides a computer-readable storage medium storing a control program for a cooking device thereon, wherein when the control program is executed by a processor, the above-described control method for the cooking device is implemented.

[0018] According to embodiments of the present invention, the computer-readable storage medium, by executing the control method of the above-described cooking equipment, can improve the reliability and lifespan of detection in high humidity environments, significantly improve the accuracy and reliability of flame state judgment of the burner, ensure safe, efficient and environmentally friendly operation of the equipment, and adapt to environmental changes.

[0019] To achieve the above objectives, a third aspect of the present invention provides a control device for a cooking apparatus. The cooking apparatus includes a combustion chamber, in which a burner and a steam generator are disposed. The control device includes: an acquisition module for acquiring combustion state information of the burner during operation and environmental state information of the combustion chamber; a determination module for determining the flame state of the burner based on the fusion of the combustion state information and the environmental state information; and a control module for controlling at least one of the burner and the steam generator based on the flame state to maintain the burner in a safe and stable operating state.

[0020] A control device for a cooking apparatus according to an embodiment of the present invention includes: an acquisition module for acquiring combustion state information of the burner during operation and environmental state information of the combustion chamber; a determination module for determining the flame state of the burner based on the fusion of the combustion state information and the environmental state information; and a control module for controlling at least one of the burner and the steam generator based on the flame state to maintain the burner in a safe and stable operating state. Thus, this device, by acquiring the combustion state of the burner and the environmental information of the combustion chamber in real time, fusing and analyzing them to determine the flame state, and intelligently controlling the burner or the steam generator accordingly, ensures that the burner is always in a safe and stable operating state. It can improve the reliability and lifespan of detection in high humidity environments, significantly improve the accuracy and reliability of flame state judgment, ensure safe, efficient, and environmentally friendly operation of the equipment, and adapt to environmental changes.

[0021] To achieve the above objectives, a fourth aspect of the present invention provides a cooking apparatus, including a control device for the cooking apparatus described above.

[0022] According to the cooking equipment of the present invention, the control device of the cooking equipment described above can improve the reliability and lifespan of detection in high humidity environments, significantly improve the accuracy and reliability of flame state judgment of the burner, ensure safe, efficient and environmentally friendly operation of the equipment, and adapt to environmental changes.

[0023] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0024] Figure 1 A flowchart of a control method for a cooking apparatus according to some embodiments of the present invention;

[0025] Figure 2 This is a schematic diagram illustrating the change of relative humidity over time under different combustion states according to some embodiments of the present invention;

[0026] Figure 3 A flowchart of a control method for a cooking apparatus according to other embodiments of the present invention;

[0027] Figure 4 A flowchart of a control method for a cooking apparatus according to further embodiments of the present invention;

[0028] Figure 5 This is a block diagram of a control device for a cooking apparatus according to some embodiments of the present invention;

[0029] Figure 6 This is a block diagram of a cooking apparatus according to some embodiments of the present invention. Detailed Implementation

[0030] Embodiments of the present invention are described in detail below. Examples of these embodiments are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0031] The following description, with reference to the accompanying drawings, outlines a control method for a cooking apparatus, a computer-readable storage medium, a control device for a cooking apparatus, and a cooking apparatus according to embodiments of the present invention.

[0032] Figure 1 This is a flowchart of a control method for a cooking apparatus according to some embodiments of the present invention.

[0033] In some embodiments, the cooking apparatus includes a combustion chamber, which is provided with a burner and a steam generator.

[0034] like Figure 1 As shown, the control method of the cooking device in this embodiment of the invention may include the following steps:

[0035] S101, acquire combustion status information and combustion chamber environmental status information of the burner during operation.

[0036] Specifically, during the operation of the burner, combustion status information and environmental status information of the combustion chamber can be detected by multiple sensors. Combustion status information may include flame intensity, noise intensity, combustion temperature and combustion temperature change rate, while environmental status information may include ambient humidity.

[0037] Among them, flame intensity can refer to the main frequency amplitude of the flame flashing signal. When the burner is burning normally, this amplitude is high and stable. Noise intensity can refer to the RMS (Root Mean Square) value of combustion noise in a specific frequency band. When the burner is burning normally, it has specific noise characteristics.

[0038] S102, determine the flame state of the burner by fusing combustion state information and environmental state information.

[0039] Specifically, after obtaining combustion state information and combustion chamber environmental state information, the flame state of the burner is comprehensively judged based on the combustion state information and environmental state information. The flame state of the burner can include normal combustion state, incomplete combustion state, and flameout state.

[0040] S103, control at least one of the burner and the steam generator according to the flame state to maintain the burner in a safe and stable operating state.

[0041] Specifically, after determining the flame state of the burner, at least one of the burner and steam generator is controlled based on the flame state. For example, when the flame state is in normal combustion, the current parameters of the burner are maintained, and the burner continues to operate. Alternatively, when the flame state is incomplete combustion, the incomplete combustion status is fed back to the controller, adjusting the air-fuel ratio or steam injection rate to stabilize the flame. Furthermore, when the flame state is in flameout, a safety interlock is immediately executed, closing the gas valve and issuing an alarm to prevent safety accidents such as deflagration. This maintains the burner in a safe and stable operating state, improves the reliability and lifespan of detection in high-humidity environments, significantly enhances the accuracy and reliability of flame state determination, ensures safe, efficient, and environmentally friendly equipment operation, and adapts to environmental changes.

[0042] In some embodiments, reference Figure 2 This is a schematic diagram illustrating the change of relative humidity over time under different combustion states according to some embodiments of the present invention. Under normal combustion state, the relative humidity rises rapidly over time, and then tends to stabilize after a period of time. Under incomplete combustion state, the relative humidity fluctuates significantly over time. Under flameout state, the relative humidity rises rapidly over time, then tends to stabilize after a period of time, and finally drops rapidly.

[0043] The control method of the cooking equipment according to embodiments of the present invention is described in detail below.

[0044] In some embodiments of the present invention, the combustion state information includes flame intensity, noise intensity, combustion temperature and combustion temperature change rate, and the environmental state information includes ambient humidity.

[0045] Specifically, flame intensity can be detected by optical sensors, noise intensity by acoustic / vibration sensors, combustion temperature and rate of change of combustion temperature by temperature sensors, and ambient humidity by humidity sensors. Among these, humidity sensors can serve as key regulators to assess the reliability of other sensors.

[0046] In some embodiments of the present invention, the flame state of the burner is determined by fusing combustion state information and environmental state information, including: determining basic weighting coefficients for flame intensity, noise intensity, and combustion temperature based on ambient humidity; adjusting the basic weighting coefficients based on the rate of change of flame intensity, noise intensity, and combustion temperature to obtain adjusted comprehensive weighting coefficients for flame intensity, noise intensity, and combustion temperature; normalizing the flame intensity, noise intensity, and combustion temperature; and determining the flame state of the burner based on the normalized flame intensity, noise intensity, combustion temperature, and comprehensive weighting coefficients.

[0047] Specifically, the combustion state information and environmental state information are standardized through filtering, amplification, and A / D (Analog-to-Digital) conversion. Filtering eliminates environmental electromagnetic interference and irrelevant frequency band noise, amplification adjusts weak signals to the optimal measurement range to fully utilize the resolution of the A / D converter, and finally, A / D conversion realizes the digitization of the signal. This lays a solid foundation for subsequent algorithm analysis, state judgment, and precise control, transforming continuous, weak, and noisy analog signals into high-quality digital signals that can be reliably identified and accurately processed by the digital control system.

[0048] For example, based on the ambient humidity and the pre-set reliability rule base, corresponding basic weight coefficients can be assigned to flame light intensity, noise intensity and combustion temperature. The pre-set reliability rule base can be optimized and configured according to different models and working modes, and has strong adaptability. The pre-set reliability rule base includes basic weight coefficients for flame light intensity, noise intensity and combustion temperature under different humidity conditions, and the value range of the basic weight coefficients is 0-1. When the ambient humidity (H_value) is low (e.g., H_value ≤ 60%RH), the basic weighting coefficients for flame intensity, noise intensity, and combustion temperature are determined to be 0.7, 0.6, and 0.5, respectively. When the ambient humidity is medium (e.g., 60% < H_value ≤ 85%RH), the basic weighting coefficients for flame intensity, noise intensity, and combustion temperature are determined to be 0.4, 0.8, and 0.6, respectively. When the ambient humidity is high (e.g., H_value > 85%RH), the basic weighting coefficients for flame intensity, noise intensity, and combustion temperature are determined to be 0.2, 0.9, and 0.7, respectively.

[0049] The basic weighting coefficients of the flame intensity are adjusted as follows: The signal-to-noise ratio (SNR) is obtained, and it is determined whether the SNR is less than a preset SNR threshold (e.g., 10 dB). When the SNR is less than the preset SNR threshold, the weight adjustment coefficient of the basic weighting coefficient of the flame intensity is 0.5; when the SNR is greater than or equal to the preset SNR threshold but less than the limit value, the weight adjustment coefficient of the basic weighting coefficient of the flame intensity is 1.0; when the SNR is greater than or equal to the limit value, the weight adjustment coefficient of the basic weighting coefficient of the flame intensity is 0.1. Here, the signal-to-noise ratio (SNR) is the ratio between the signal power and noise power in the flame intensity signal. It can be determined using a detector, and its calculation formula is SNR = 10 * log0. 10 (Signal power / noise power), measured in decibels, is used to quantify the relative strengths of the effective components and noise in an optical signal. In this embodiment, the limiting value is a preset value greater than a preset signal-to-noise ratio threshold, which can be set in advance based on information such as fuel type and application environment.

[0050] Adjust the basic weighting coefficient of noise intensity: Obtain background mechanical vibration noise and determine whether the background mechanical vibration noise is greater than the preset background mechanical vibration noise threshold (e.g., 200Hz). When the background mechanical vibration noise is greater than the preset background mechanical vibration noise threshold, the weighting adjustment coefficient of the basic weighting coefficient of noise intensity is 0.6; when the background mechanical vibration noise is less than or equal to the preset background mechanical vibration noise threshold, the weighting adjustment coefficient of the basic weighting coefficient of noise intensity is 1.0.

[0051] Adjust the basic weight coefficient of combustion temperature: obtain the combustion temperature change rate, determine whether the combustion temperature change rate is greater than the preset combustion temperature change rate threshold (e.g., 10℃ / s), when the combustion temperature change rate is greater than the preset combustion temperature change rate threshold, the weight fine-tuning coefficient of the basic weight coefficient of combustion temperature is 0.6; when the combustion temperature change rate is less than or equal to the preset combustion temperature change rate threshold, the weight fine-tuning coefficient of the basic weight coefficient of combustion temperature is 1.0.

[0052] It should be noted that the preset signal-to-noise ratio threshold, preset background mechanical vibration noise threshold, and preset combustion temperature change rate threshold are only initial values ​​and can be adjusted accordingly through machine learning.

[0053] After obtaining the weight adjustment coefficients of the basic weight coefficients of flame intensity, noise intensity, and combustion temperature, the adjusted comprehensive weight coefficients of flame intensity, noise intensity, and combustion temperature are obtained based on each weight adjustment coefficient and the corresponding basic weight coefficient. It can also be understood that the comprehensive weight coefficient can be obtained by multiplying the weight adjustment coefficient by the basic weight coefficient.

[0054] The flame intensity, noise intensity, and combustion temperature are normalized to the [0,1] interval to obtain their confidence levels. After normalization, the burner's flame state can be determined based on the flame intensity, noise intensity, combustion temperature, and comprehensive weighting coefficients.

[0055] In some embodiments of the present invention, the flame intensity, noise intensity, and combustion temperature are normalized, including: obtaining upper limits for flame intensity, noise intensity, combustion temperature, and combustion temperature; using the ratio between the flame intensity and the upper limit for flame intensity as the normalized result of the flame intensity; using the ratio between the noise intensity and the upper limit for noise intensity as the normalized result of the noise intensity; and using the ratio between the first difference between the combustion temperature and the lower limit for combustion temperature and the second difference between the upper limit for combustion temperature and the lower limit for combustion temperature as the normalized result of the combustion temperature.

[0056] Specifically, the upper limit of flame intensity is obtained. This upper limit represents the maximum ADC (Analog-to-Digital Converter) reading or voltage value that the optical sensor is expected to achieve under stable and vigorous combustion conditions. It represents the maximum light intensity signal under ideal combustion conditions and is typically determined experimentally by repeatedly measuring the output of the optical sensor during normal operation and at the peak of combustion, and then recording the statistical peak value. The ratio between the flame intensity and the upper limit of flame intensity is used as the normalized result of the flame intensity. In other words, dividing the flame intensity obtained at the current moment by the upper limit of flame intensity yields the normalized result of the flame intensity.

[0057] The upper limit of noise intensity is obtained, where the upper limit represents the maximum energy value or RMS value that the acoustic sensor is expected to achieve within the combustion characteristic frequency band under stable and vigorous combustion conditions. It represents the maximum energy level of combustion noise under ideal combustion conditions. This can be determined experimentally by measuring the energy integral or RMS value of the acoustic signal in the target frequency band during stable combustion; this value reflects the upper limit of acoustic intensity under normal combustion. The ratio between the noise intensity and the upper limit of noise intensity is used as the normalized result of the noise intensity. In other words, dividing the noise intensity acquired at the current moment by the upper limit of noise intensity yields the normalized result of the noise intensity.

[0058] The upper and lower limits of the combustion temperature are obtained. The lower limit represents the starting temperature of the effective measurement range of the temperature sensor. This lower limit can reflect the initial ambient temperature before device startup (e.g., 25°C) or a safe low temperature limit (e.g., 0°C), used to establish a relative zero point for temperature changes. The upper limit represents the safe upper limit of the effective measurement range of the temperature sensor. This value can be the sensor's own temperature resistance limit or the highest temperature that may be reached under normal combustion conditions. The ratio between the first difference between the combustion temperature and the lower limit, and the second difference between the upper and lower limits, is used as the normalized result of the combustion temperature. In other words, the first difference and the second difference are calculated, and then the normalized result of the combustion temperature is obtained by dividing the first difference by the second difference.

[0059] As a specific example, such as Figure 3 As shown in the flowchart, the control method of the cooking device of the present invention may include the following steps:

[0060] S301 acquires combustion status information (flame intensity, noise intensity, combustion temperature and combustion temperature change rate) and environmental status information (ambient humidity) of the combustion chamber during the operation of the burner.

[0061] S302, determine the ambient humidity H_value.

[0062] S303, when the ambient humidity H_value is in a low humidity condition (H_value≤60%RH), the basic weighting coefficient of flame intensity can be determined to be 0.7, the basic weighting coefficient of noise intensity is 0.6, and the basic weighting coefficient of combustion temperature is 0.5.

[0063] S304, when the ambient humidity H_value is in a medium humidity condition (60%<H_value≤85%RH), the basic weighting coefficient of flame intensity can be determined to be 0.4, the basic weighting coefficient of noise intensity is 0.8, and the basic weighting coefficient of combustion temperature is 0.6.

[0064] S305, when the ambient humidity H_value is in a high humidity condition (H_value>85%RH), the basic weighting coefficient of flame intensity can be determined to be 0.2, the basic weighting coefficient of noise intensity is 0.9, and the basic weighting coefficient of combustion temperature is 0.7.

[0065] S306, the basic weighting coefficients are adjusted based on the flame intensity, noise intensity and combustion temperature change rate to obtain the corresponding comprehensive weighting coefficients of the adjusted flame intensity, noise intensity and combustion temperature.

[0066] S307, the normalized results of flame light intensity (I-optical), noise intensity (I-acoustic), and combustion temperature (I-temperature) are calculated.

[0067] In some embodiments of the present invention, determining the flame state of the burner based on the normalized flame intensity, noise intensity, combustion temperature, and comprehensive weighting coefficient includes: multiplying the normalized flame intensity, noise intensity, and combustion temperature by their respective comprehensive weighting coefficients and summing them to obtain a first sum; summing the corresponding comprehensive weighting coefficients of the flame intensity, noise intensity, and combustion temperature to obtain a second sum; and determining the flame state of the burner based on the ratio between the first sum and the second sum.

[0068] Specifically, after obtaining the normalized flame intensity, noise intensity, and combustion temperature, a weighted fusion algorithm (weighted DS evidence theory) can be used for comprehensive decision-making to determine the burner's flame state and further dynamically evaluate the reliability of each sensor. The weighted DS evidence theory is a significant improvement over the classic DS theory. By introducing the concept of "evidence weights," it preprocesses the evidence before fusion, reducing the impact of unreliable or highly conflicting evidence on the final decision, thus making the fusion result more reasonable and robust.

[0069] Multiplying the normalized flame intensity by a comprehensive weighting coefficient yields the first product; multiplying the normalized noise intensity by a comprehensive weighting coefficient yields the second product; multiplying the normalized combustion temperature by a comprehensive weighting coefficient yields the third product. Then, the sum of the first, second, and third products is calculated to obtain the first sum. The sum of the comprehensive weighting coefficients for flame intensity, noise intensity, and combustion temperature is then calculated to obtain the second sum. Finally, dividing the first sum by the second sum yields the ratio between the two sums. This ratio is used to determine the burner's flame state.

[0070] In some embodiments of the present invention, determining the flame state of the burner based on the ratio between a first sum and a second sum includes: determining the flame state as normal combustion when the ratio between the first sum and the second sum is greater than a preset first threshold and the rate of change of the ratio between the first sum and the second sum is less than a preset rate of change; determining the flame state as incomplete combustion when the ratio between the first sum and the second sum is greater than a preset second threshold and less than or equal to a preset first threshold, or when the rate of change of the ratio between the first sum and the second sum is greater than or equal to a preset rate of change; and determining the flame state as flameout when the ratio between the first sum and the second sum is less than or equal to a preset second threshold and the duration is greater than a preset duration. The preset first threshold, preset rate of change, preset second threshold, and preset duration can be calibrated according to actual conditions.

[0071] Specifically, after obtaining the ratio between the first sum and the second sum, it is determined whether the ratio is greater than a preset first threshold (e.g., 0.7) and whether the rate of change of the ratio is less than a preset rate of change (e.g., 0.1). When the ratio is greater than the preset first threshold and the rate of change is less than the preset rate of change, the flame state can be considered normal combustion. It is also determined whether the ratio is greater than a preset second threshold (e.g., 0.3) and less than or equal to the preset first threshold, or whether the rate of change of the ratio is greater than or equal to the preset rate of change. When the ratio is greater than the preset second threshold and less than or equal to the preset first threshold, or the rate of change is greater than or equal to the preset rate of change, the flame state can be considered incomplete combustion. The system determines whether the ratio between the first and second sums is less than or equal to a preset second threshold and whether the duration of this ratio is greater than a preset duration (e.g., 2 seconds). If the ratio is less than or equal to the preset second threshold and the duration is greater than the preset duration, the flame can be considered extinguished. The preset duration includes a delay to prevent momentary misjudgment. By analyzing the ratio and trend of the first and second sums, the system can identify precursors to instability before the flame completely extinguishes or experiences violent oscillations, thus enabling preventative control.

[0072] In some embodiments of the present invention, controlling at least one of the burner and the steam generator according to the flame state includes: maintaining the current operating parameters of the burner and the steam generator when the flame state is in a normal combustion state; increasing the air damper of the burner or decreasing the operating power of the steam generator when the flame state is in an incomplete combustion state; and closing the gas valve of the burner and triggering an alarm when the flame state is in a flameout state.

[0073] Specifically, after determining the burner's flame state based on the ratio between the first and second sums, the corresponding control strategy is executed according to the determination result. If the flame state is normal combustion, the current operating parameters of the burner and steam generator need to be maintained to ensure continuous operation. If the flame state is incomplete combustion, the burner's damper, gas valve, or the steam generator's operating power needs to be increased to stabilize the flame. If the flame state is flameout, a safety interlock action needs to be immediately executed, closing the burner's gas valve and triggering an alarm to prevent safety accidents such as deflagration.

[0074] In some embodiments, after determining the flame state, the combustion state information of the burner during operation and the environmental state information of the combustion chamber are continuously acquired to achieve real-time, uninterrupted monitoring and control, forming a closed-loop control system.

[0075] As a specific example, such as Figure 4 As shown in the flowchart, the control method of the cooking device of the present invention may include the following steps:

[0076] S401, after normalization, the flame intensity, noise intensity and combustion temperature are multiplied by their respective comprehensive weighting coefficients and summed to obtain the first sum. The flame intensity, noise intensity and combustion temperature are summed by their respective comprehensive weighting coefficients to obtain the second sum. The ratio S-fusion between the first sum and the second sum is calculated.

[0077] S402, analyze the ratio S-fusion between the first sum and the second sum and its rate of change d(S-fusion) / dt.

[0078] S403, S-fusion > 0.7 and d(S-fusion) / dt < 0.1, the flame state is normal combustion state.

[0079] For S404, 0.3 < S-fusion ≤ 0.7 or d(S-fusion) / dt ≥ 0.1, the flame state is incomplete combustion.

[0080] S405, S-fusion≤0.3 and lasts for more than 2s, flame status is extinguished.

[0081] S406, maintain the current operating parameters of the burner and steam generator.

[0082] S407, increase the burner damper or reduce the operating power of the steam generator.

[0083] S408, shut off the gas valve of the burner and trigger an alarm.

[0084] Therefore, this invention can solve the problems of easy failure, misjudgment, and inability to adapt to the drastic dynamic changes in the operating conditions of wet combustion in high temperature and high humidity environments. By using real-time ambient humidity as the core criterion, it dynamically allocates the confidence weights of optical sensors, acoustic sensors, and temperature sensors, and integrates their signals for comprehensive decision-making. It also designs a two-layer weight adaptive adjustment algorithm. The first layer determines the basic confidence weight of each sensor based on the ambient humidity. The second layer fine-tunes the weights based on the real-time signal quality of each sensor (such as signal-to-noise ratio, acoustic background noise, and temperature change rate), and comprehensively judges the flame state of the burner. This can improve the reliability and lifespan of detection in high humidity environments, significantly improve the accuracy and reliability of flame state judgment, maintain the burner in a safe and stable operating state, ensure the safe, efficient, and environmentally friendly operation of the equipment, and adapt to environmental changes.

[0085] In summary, the control method for a cooking device according to an embodiment of the present invention includes: acquiring combustion state information of the burner during operation and environmental state information of the combustion chamber; determining the flame state of the burner based on the fusion of the combustion state information and the environmental state information; and controlling at least one of the burner and the steam generator based on the flame state to maintain the burner in a safe and stable operating state. Therefore, this method, by acquiring the combustion state of the burner and the environmental information of the combustion chamber in real time, fusing and analyzing them to determine the flame state, and intelligently controlling the burner or the steam generator accordingly, ensures that the burner is always in a safe and stable operating state. It can improve the reliability and lifespan of detection in high humidity environments, significantly improve the accuracy and reliability of flame state judgment, ensure safe, efficient, and environmentally friendly operation of the equipment, and adapt to environmental changes.

[0086] Corresponding to the above embodiments, the present invention also proposes a computer-readable storage medium.

[0087] The present invention provides a computer-readable storage medium having a control program for a cooking device stored thereon. When the control program is executed by a processor, it implements the aforementioned control method for the cooking device.

[0088] According to embodiments of the present invention, the computer-readable storage medium, by executing the control method of the above-described cooking equipment, can improve the reliability and lifespan of detection in high humidity environments, significantly improve the accuracy and reliability of flame state judgment of the burner, ensure safe, efficient and environmentally friendly operation of the equipment, and adapt to environmental changes.

[0089] Corresponding to the above embodiments, the present invention also proposes a control device for cooking equipment.

[0090] like Figure 5 As shown, the control device 500 of the cooking equipment in this embodiment of the invention includes an acquisition module 510, a determination module 520 and a control module 530.

[0091] The acquisition module 510 acquires combustion state information and environmental state information of the combustion chamber during burner operation. The determination module 520 determines the flame state of the burner based on the fusion of the combustion state information and the environmental state information. The control module 530 controls at least one of the burner and the steam generator based on the flame state to maintain the burner in a safe and stable operating state.

[0092] In some embodiments of the present invention, the combustion state information includes flame intensity, noise intensity, combustion temperature and combustion temperature change rate, and the environmental state information includes ambient humidity.

[0093] In some embodiments of the present invention, the determining module 520 determines the flame state of the burner by fusing combustion state information and environmental state information. Specifically, it is used to: determine the basic weighting coefficients corresponding to flame intensity, noise intensity, and combustion temperature based on the ambient humidity; adjust the basic weighting coefficients based on the rate of change of flame intensity, noise intensity, and combustion temperature to obtain the adjusted comprehensive weighting coefficients corresponding to flame intensity, noise intensity, and combustion temperature; normalize the flame intensity, noise intensity, and combustion temperature; and determine the flame state of the burner based on the normalized flame intensity, noise intensity, combustion temperature, and comprehensive weighting coefficients.

[0094] In some embodiments of the present invention, the determining module 520 performs normalization processing on the flame intensity, noise intensity, and combustion temperature, specifically for: obtaining the upper limit value of the flame intensity, the upper limit value of the noise intensity, the upper limit value of the combustion temperature, and the lower limit value of the combustion temperature; taking the ratio between the flame intensity and the upper limit value of the flame intensity as the normalization result of the flame intensity, taking the ratio between the noise intensity and the upper limit value of the noise intensity as the normalization result of the noise intensity, and taking the ratio between the first difference between the combustion temperature and the lower limit value of the combustion temperature and the second difference between the upper limit value of the combustion temperature and the lower limit value of the combustion temperature as the normalization result of the combustion temperature.

[0095] In some embodiments of the present invention, the determining module 520 determines the flame state of the burner based on the normalized flame intensity, noise intensity, combustion temperature, and comprehensive weighting coefficient. Specifically, it is used to: multiply the normalized flame intensity, noise intensity, and combustion temperature by their respective comprehensive weighting coefficients and sum them to obtain a first sum; and sum the corresponding comprehensive weighting coefficients of the flame intensity, noise intensity, and combustion temperature to obtain a second sum; and determine the flame state of the burner based on the ratio between the first sum and the second sum.

[0096] In some embodiments of the present invention, the determining module 520 determines the flame state of the burner based on the ratio between the first sum and the second sum, specifically configured to: determine the flame state as a normal combustion state when the ratio between the first sum and the second sum is greater than a preset first threshold and the rate of change of the ratio between the first sum and the second sum is less than a preset rate of change; determine the flame state as an incomplete combustion state when the ratio between the first sum and the second sum is greater than a preset second threshold and less than or equal to a preset first threshold, or when the rate of change of the ratio between the first sum and the second sum is greater than or equal to a preset rate of change; and determine the flame state as a flameout state when the ratio between the first sum and the second sum is less than or equal to a preset second threshold and the duration is greater than a preset duration.

[0097] In some embodiments of the present invention, the control module 530 controls at least one of the burner and the steam generator according to the flame state, specifically for: maintaining the current operating parameters of the burner and the steam generator when the flame state is in a normal combustion state; increasing the air damper of the burner or reducing the operating power of the steam generator when the flame state is in an incomplete combustion state; and closing the gas valve of the burner and triggering an alarm when the flame state is in a flameout state.

[0098] It should be noted that for details not disclosed in the control device of the cooking equipment in the embodiments of the present invention, please refer to the details disclosed in the control method of the cooking equipment in the embodiments of the present invention, which will not be repeated here.

[0099] In summary, the control device for the cooking equipment according to an embodiment of the present invention includes: an acquisition module for acquiring combustion state information of the burner during operation and environmental state information of the combustion chamber; a determination module for determining the flame state of the burner based on the fusion of the combustion state information and the environmental state information; and a control module for controlling at least one of the burner and the steam generator based on the flame state to maintain the burner in a safe and stable operating state. Thus, this device, by acquiring the combustion state of the burner and the environmental information of the combustion chamber in real time, fusing and analyzing them to determine the flame state, and intelligently controlling the burner or the steam generator accordingly, ensures that the burner is always in a safe and stable operating state. It can improve the reliability and lifespan of detection in high humidity environments, significantly improve the accuracy and reliability of flame state judgment, ensure safe, efficient, and environmentally friendly operation of the equipment, and adapt to environmental changes.

[0100] Corresponding to the above embodiments, the present invention also proposes a cooking device.

[0101] like Figure 6 As shown, the cooking device 600 of this embodiment includes the control device 500 of the cooking device described above.

[0102] According to the embodiments of the present invention, the cooking equipment 600, through the control device 500 of the cooking equipment described above, can improve the reliability and lifespan of detection in high humidity environments, significantly improve the accuracy and reliability of flame state judgment of the burner, ensure safe, efficient and environmentally friendly operation of the equipment, and adapt to environmental changes.

[0103] It should be noted that the logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as a sequenced list of executable instructions for implementing logical functions, and can be specifically implemented in any computer-readable medium for use by, or in conjunction with, an instruction execution system, apparatus, or device (such as a computer-based system, a processor-included system, or other system that can fetch and execute instructions from, an instruction execution system, apparatus, or device). For the purposes of this specification, "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transmit programs for use by, or in conjunction with, an instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of computer-readable media include: an electrical connection having one or more wires (electronic device), a portable computer disk drive (magnetic device), random access memory (RAM), read-only memory (ROM), erasable and editable read-only memory (EPROM or flash memory), fiber optic devices, and portable optical disc read-only memory (CDROM). Furthermore, computer-readable media can even be paper or other suitable media on which programs can be printed, because programs can be obtained electronically, for example, by optically scanning the paper or other media, followed by editing, interpreting, or otherwise processing as necessary, and then stored in computer memory.

[0104] It should be understood that various parts of the present invention can be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, multiple steps or methods can be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, it can be implemented using any one or a combination of the following techniques known in the art: discrete logic circuits having logic gates for implementing logical functions on data signals, application-specific integrated circuits (ASICs) having suitable combinational logic gates, programmable gate arrays (PGAs), field-programmable gate arrays (FPGAs), etc.

[0105] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0106] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0107] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0108] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A method for controlling a cooking device, characterized in that, The cooking equipment includes a combustion chamber, the combustion chamber being equipped with a burner and a steam generator; the method includes: The combustion state information of the burner during operation and the environmental state information of the combustion chamber are obtained. The combustion state information includes flame intensity, noise intensity, combustion temperature and combustion temperature change rate. The environmental state information includes ambient humidity. The flame state of the burner is determined by fusing the combustion state information and the environmental state information. The flame state includes normal combustion state, incomplete combustion state, and flameout state. At least one of the burner and the steam generator is controlled according to the flame state to maintain the burner in a safe and stable operating state; The determination of the burner's flame state based on the fusion of the combustion state information and the environmental state information includes: The basic weighting coefficients for the flame intensity, the noise intensity, and the combustion temperature are determined based on the ambient humidity. The basic weighting coefficients are adjusted based on the flame intensity, the noise intensity, and the rate of change of combustion temperature to obtain the adjusted comprehensive weighting coefficients for the flame intensity, noise intensity, and combustion temperature. The flame intensity, the noise intensity, and the combustion temperature are normalized. The flame state of the burner is determined based on the normalized flame intensity, noise intensity, combustion temperature, and the comprehensive weighting coefficient.

2. The control method for the cooking equipment according to claim 1, characterized in that, Normalization of the flame intensity, the noise intensity, and the combustion temperature includes: Obtain the upper limits of flame intensity, noise intensity, combustion temperature, and combustion temperature; The ratio between the flame intensity and the upper limit of the flame intensity is used as the normalized result of the flame intensity. The ratio between the noise intensity and the upper limit of the noise intensity is used as the normalized result of the noise intensity. The ratio between the first difference between the combustion temperature and the lower limit of the combustion temperature and the second difference between the upper limit of the combustion temperature and the lower limit of the combustion temperature is used as the normalized result of the combustion temperature.

3. The control method for the cooking equipment according to claim 1, characterized in that, The flame state of the burner is determined based on the normalized flame intensity, noise intensity, combustion temperature, and the comprehensive weighting coefficient, including: The flame intensity, noise intensity, and combustion temperature after the normalization process are each multiplied by their respective comprehensive weighting coefficients and summed to obtain a first sum. The flame intensity, noise intensity, and combustion temperature are then summed by their respective comprehensive weighting coefficients to obtain a second sum. The flame state of the burner is determined based on the ratio between the first sum and the second sum.

4. The control method for the cooking equipment according to claim 3, characterized in that, Determining the flame state of the burner based on the ratio between the first sum and the second sum includes: When the ratio between the first sum and the second sum is greater than a preset first threshold and the rate of change of the ratio between the first sum and the second sum is less than a preset rate of change, the flame state is determined to be a normal combustion state. When the ratio between the first sum and the second sum is greater than a preset second threshold and less than or equal to the preset first threshold, or when the rate of change of the ratio between the first sum and the second sum is greater than or equal to a preset rate of change, the flame state is determined to be an incomplete combustion state. When the ratio between the first sum and the second sum is less than or equal to the preset second threshold and the duration is greater than the preset duration, the flame state is determined to be an extinguished state.

5. The control method for the cooking equipment according to claim 4, characterized in that, Controlling at least one of the burner and the steam generator according to the flame state includes: When the flame state is the normal combustion state, the current operating parameters of the burner and the steam generator are maintained; When the flame state is the incomplete combustion state, increase the damper of the burner or reduce the operating power of the steam generator; When the flame state is the flameout state, the gas valve of the burner is closed and an alarm is triggered.

6. A computer-readable storage medium, characterized in that, It stores a control program for a cooking device, which, when executed by a processor, implements the control method for the cooking device according to any one of claims 1-5.

7. A control device for a cooking appliance, characterized in that, The cooking equipment includes a combustion chamber, which is equipped with a burner and a steam generator; the control device includes: The acquisition module is used to acquire combustion state information of the burner during operation and environmental state information of the combustion chamber. The combustion state information includes flame intensity, noise intensity, combustion temperature and combustion temperature change rate, and the environmental state information includes ambient humidity. The determination module is used to determine the flame state of the burner based on the fusion of the combustion state information and the environmental state information. The flame state includes normal combustion state, incomplete combustion state, and flameout state. The control module is used to control at least one of the burner and the steam generator according to the flame state, so as to maintain the burner in a safe and stable operating state; The determining module is used to: determine the basic weighting coefficients corresponding to the flame intensity, the noise intensity, and the combustion temperature based on the ambient humidity; adjust the basic weighting coefficients based on the flame intensity, noise intensity, and the rate of change of the combustion temperature to obtain the adjusted comprehensive weighting coefficients corresponding to the flame intensity, noise intensity, and combustion temperature; normalize the flame intensity, noise intensity, and combustion temperature; and determine the flame state of the burner based on the normalized flame intensity, noise intensity, combustion temperature, and the comprehensive weighting coefficients.

8. A cooking device, characterized in that, Includes the control device of the cooking apparatus of claim 7.

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