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CN-121977234-A - Intelligent range hood control method and intelligent range hood

CN121977234ACN 121977234 ACN121977234 ACN 121977234ACN-121977234-A

Abstract

The application relates to an intelligent range hood control method and an intelligent range hood, wherein the method comprises the steps of monitoring radiation intensity of a target object under a preset wave band in real time, calculating an object state index based on the radiation intensity, inverting the surface temperature of the target object based on the preset wave band and the radiation intensity, obtaining a dry combustion index based on the object state index and the surface temperature of the target object, predicting the risk state of the target object based on the dry combustion index, and controlling the intelligent range hood to operate based on the predicted risk state. The application solves the problems that the existing intelligent range hood control method calculates the surface temperature of the cooking utensil and can not accurately predict the dry burning of the cooking utensil, thereby the intelligent range hood can not be accurately controlled in advance.

Inventors

  • HE LIBO

Assignees

  • 宁波方太厨具有限公司

Dates

Publication Date
20260505
Application Date
20260105

Claims (10)

  1. 1. The intelligent control method of the range hood is characterized by comprising the following steps: Monitoring the radiation intensity of a target object under a preset wave band in real time; Calculating an object state index based on the radiation intensity; inverting the surface temperature of the target object based on the preset wave band and the radiation intensity; Obtaining a dry combustion index based on the object state index and the surface temperature of the target object; And predicting the risk state of the target object based on the dry combustion index, and controlling the intelligent range hood to operate based on the predicted risk state.
  2. 2. The method of claim 1, wherein the real-time monitoring of radiation intensity at a predetermined wavelength band comprises: The preset wave band comprises a preset water molecule absorption wave band, a preset water molecule reference wave band, a preset grease oxidation characteristic wave band and a preset temperature inversion reference wave band; and monitoring the corresponding water molecule absorption radiation intensity, the water molecule reference radiation intensity, the grease oxidation characteristic radiation intensity and the temperature inversion reference radiation intensity under the preset water molecule absorption wave band, the preset water molecule reference wave band, the preset grease oxidation characteristic wave band and the preset temperature inversion reference wave band in real time.
  3. 3. The method of claim 2, wherein said calculating an object state index based on said radiation intensity comprises: calculating a water molecular state index based on the water molecule absorption radiation intensity and the water molecule reference radiation intensity; and calculating an oxide state index based on the grease oxidation characteristic radiation intensity and the temperature inversion reference radiation intensity.
  4. 4. The method of claim 2, wherein inverting the surface temperature of the target based on the predetermined wavelength band and the radiation intensity comprises: Calculating the surface temperature of the target object by adopting the temperature inversion algorithm based on the wavelength in the preset temperature inversion reference wave band and the temperature inversion reference radiation intensity; the temperature inversion algorithm comprises the following steps: And inverting the wavelength in a reference wave band and the temperature inversion reference radiation intensity based on the first radiation constant, the second radiation constant and the preset temperature, taking the wavelength and the temperature inversion reference radiation intensity into an expression established based on the Planckian radiation law, and inverting to obtain the surface temperature of the target object.
  5. 5. A method according to claim 3, wherein the deriving a dry heat index based on the physical state index and the surface temperature of the target comprises: Calculating the temperature rise rate of the target object based on the surface temperature of the target object; respectively assigning weights to the water state index, the oxide state index and the temperature rise rate to establish a dry combustion index decision model; And obtaining the dry combustion index based on the dry combustion index decision model.
  6. 6. The method of claim 1, wherein predicting the risk status of the target based on the dry heat index and performing control of an intelligent range hood based on the risk status comprises: when the dry combustion index is lower than a preset first threshold, predicting that the target object is in a first risk state, and controlling the intelligent range hood to operate in a first mode; When the dry combustion index is higher than the preset first threshold and lower than the preset second threshold, judging a second risk state, and controlling the intelligent range hood to operate in a second mode; And when the dry combustion index is higher than the preset second threshold, judging a third risk state, and controlling the intelligent range hood to operate in a third mode.
  7. 7. A method according to claim 3, further comprising, after calculating the physical state index based on the radiation intensity: establishing a grease health degree model based on the oxide state index, a preset new oil reference value and a preset waste oil threshold value; calculating the current grease health degree based on the grease health degree model; and when the current oil health degree is lower than the preset waste oil threshold value, an early warning is initiated.
  8. 8. The method of claim 2, further comprising, after monitoring the radiation intensity at the predetermined wavelength band in real time: Establishing a flame monitoring model based on the preset monitoring period and the grease oxidation characteristic radiation intensity in the preset monitoring period; Obtaining a flame radiation change rate based on the flame monitoring model; Comparing the flame radiation change rate with a preset flame radiation change threshold value to judge whether the target object is in a flameout state or a normal combustion state.
  9. 9. The method of claim 5, further comprising, after calculating a surface temperature of the target using a temperature inversion algorithm based on the predetermined wavelength band and the radiation intensity: Establishing a mode feature vector based on the moisture state index, the oxide state index and the temperature rise rate; comparing the mode characteristic vector with a preset mode threshold value to identify a cooking mode of the target object; and correspondingly executing control on the intelligent range hood based on the cooking mode.
  10. 10. An intelligent range hood comprising a multispectral sensing module for performing the method of any one of claims 1 to 9.

Description

Intelligent range hood control method and intelligent range hood Technical Field The application relates to the field of intelligent range hood control, in particular to an intelligent range hood control method and an intelligent range hood. Background The intelligent range hood is an indispensable electrical appliance in a modern kitchen, and has the core function of exhausting oil smoke and hot air generated in the cooking process so as to ensure indoor air cleaning and user health. With the development of technology, the requirements of users on intelligent smoke ventilators have been upgraded from basic smoke exhaustion to pursuit of cooking safety and intelligent experience. In the cooking process, a user may leave or be distracted temporarily to cause the cookware to be in an unattended state, so that the cooking utensil is dry-burned, and fire is easily caused. Meanwhile, the oil smoke difference generated by different cooking modes is obvious, and the intelligent range hood is required to dynamically adjust the air quantity so as to realize efficient smoke discharge. Therefore, the active recognition of cooking risk, intelligent judgment of cooking state and automatic adjustment of operation strategy have become the function to be realized in the existing intelligent control method of the range hood. At present, an intelligent range hood control scheme with an early warning function is existing in the prior art, and an infrared detector is generally adopted to receive wide-spectrum infrared radiation energy emitted by a pan bottom, and the wide-spectrum infrared radiation energy is converted into the pan temperature as a basis for judging the state of a cooking appliance. However, the influence of the interference of water vapor and oil fume on the wide-spectrum infrared radiation energy is not considered, so that the converted surface temperature value of the cooking utensil deviates from the true value. The reliability of the dry burning judgment based on the inaccurate temperature result is low, and the intelligent range hood cannot be controlled in advance before the cooking utensil is dry burned. Aiming at the technical problems that in the prior art, the surface temperature value of a cooking appliance is calculated and is not out of alignment, and the dry burning of the cooking appliance cannot be accurately predicted, so that the intelligent range hood cannot be accurately controlled in advance, no effective solution is proposed in the industry at present. Disclosure of Invention The embodiment of the application provides an intelligent range hood control method and an intelligent range hood, which are used for solving the problems that the existing intelligent range hood control method is used for calculating the misalignment of the surface temperature of a cooking appliance and can not accurately predict the dry burning of the cooking appliance, so that the intelligent range hood can not be accurately controlled in advance. In a first aspect, in an embodiment of the present application, there is provided a control method of an intelligent range hood, including: Monitoring the radiation intensity of a target object under a preset wave band in real time; Calculating an object state index based on the radiation intensity; inverting the surface temperature of the target object based on the preset wave band and the radiation intensity; Obtaining a dry combustion index based on the object state index and the surface temperature of the target object; And predicting the risk state of the target object based on the dry combustion index, and controlling the intelligent range hood to operate based on the predicted risk state. In some of these embodiments, the monitoring radiation intensity in the predetermined wavelength band includes: The preset wave band comprises a preset water molecule absorption wave band, a preset water molecule reference wave band, a preset grease oxidation characteristic wave band and a preset temperature inversion reference wave band; and monitoring the corresponding water molecule absorption radiation intensity, the water molecule reference radiation intensity, the grease oxidation characteristic radiation intensity and the temperature inversion reference radiation intensity under the preset water molecule absorption wave band, the preset water molecule reference wave band, the preset grease oxidation characteristic wave band and the preset temperature inversion reference wave band in real time. In further embodiments, the calculating the physical state index based on the radiation intensity comprises: calculating a water molecular state index based on the water molecule absorption radiation intensity and the water molecule reference radiation intensity; and calculating an oxide state index based on the grease oxidation characteristic radiation intensity and the temperature inversion reference radiation intensity. In some further embodiments, the inverting the surface tempe