Coke pot detection method and device and range hood

Abstract

The invention discloses a coke pot detection method and device and a range hood. The coke pot detection method is applied to the range hood, the range hood comprises a first particulate matter detection module and a second particulate matter detection module, and the coke pot detection method comprises the steps that after the first particulate matter detection module is started and the second particulate matter detection module is closed, the current pot bottom temperature is obtained; determining a corresponding temperature rise rate and judging whether the current cookware has a scorching risk or not; starting a second particulate matter detection module after judging that the current cookware has the risk of scorching, and acquiring the actual concentration of second particulate matters in the current oil smoke by adopting the second particulate matter detection module; and according to the actual concentration of the second particulate matter, determining a corresponding particulate matter concentration rising rate and a second particulate matter concentration proportion, and according to the actual concentration of the second particulate matter, the particulate matter concentration rising rate, the second particulate matter concentration proportion and the temperature rising rate, determining whether the current pot is scorched or not. According to the invention, accurate judgment of the coke pot condition is realized.

Description

Technical Field

[0001] This invention relates to the field of smart home technology, and in particular to a method, device, and range hood for detecting burnt food. Background Technology

[0002] One key concern for users during cooking is scorching. Scorching occurs when food in a pan burns or burns at high temperatures. Not only does it ruin the cooking process, but it also contaminates cookware, making it difficult to clean, and in severe cases, it can even cause a fire, posing a safety hazard to the kitchen. Therefore, installing a device in the kitchen to detect and prevent scorching is essential.

[0003] Currently, the main methods for detecting burnt pots on the market are through smoke alarms (smoke detectors) or temperature detection of the bottom of the pot. Smoke alarms often only respond when the smoke concentration is already very high, or even when the user can see the smoke with the naked eye. By this time, the burnt pot phenomenon has already occurred for a long time, making them not very practical. Temperature detection methods are difficult to adapt to various types of pots, and the system has a high false judgment rate, making it impossible to accurately detect burnt pot conditions. Summary of the Invention

[0004] This invention provides a method, device, and smoke machine for detecting burnt pots, in order to solve the problems of slow response, inaccurate detection of burnt pot conditions, high false judgment rate, and poor versatility in current burnt pot detection methods.

[0005] According to one aspect of the present invention, a method for detecting scorch residue is provided. This method is applied to a tobacco hood, which includes a first particulate matter detection module and a second particulate matter detection module. The first particulate matter detection module is used to detect the concentration of particulate matter with a first particle size, and the second particulate matter detection module is used to detect the concentration of particulate matter with a second particle size. The first particle size is larger than the second particle size. The method for detecting scorch residue includes:

[0006] After activating the first particulate matter detection module and deactivating the second particulate matter detection module, the current bottom temperature of the cookware is obtained, and the corresponding temperature rise rate is determined based on the current bottom temperature, as well as whether there is a risk of the cookware burning.

[0007] After determining that there is a risk of scorching in the cookware, the second particulate matter detection module is activated, and the actual concentration of the second particulate matter in the current oil fume is obtained using the second particulate matter detection module.

[0008] The corresponding rate of increase of particulate matter concentration and the proportion of second particulate matter concentration are determined based on the actual concentration of second particulate matter, and whether the cookware is scorching is determined based on the actual concentration of second particulate matter, the rate of increase of particulate matter concentration, the proportion of second particulate matter concentration, and the rate of increase of temperature.

[0009] Optionally, determine whether there is a risk of burning in the cookware based on the current temperature of the bottom of the pot, including:

[0010] If the current temperature of the bottom of the pot is greater than or equal to the scorching threshold temperature, it is determined that the current pot is at risk of scorching.

[0011] If the current bottom temperature of the pot is lower than the scorching threshold temperature, the bottom temperature of the pot will continue to be monitored.

[0012] Optionally, a second particulate matter detection module is used to obtain the actual concentration of the second particulate matter in the current cooking fumes, including:

[0013] The second particulate matter detection module is used to obtain the current concentration of the second particulate matter in the current cooking fume, and the actual concentration of the second particulate matter in the current cooking fume is determined based on the current concentration of the second particulate matter and the current temperature of the bottom of the cookware.

[0014] Optionally, the actual concentration of the second particulate matter in the current cooking fumes can be determined based on the following formula:

[0015] C1 = m × c1 × (T - T0);

[0016] Where C1 is the actual concentration of the second particulate matter; c1 is the current concentration of the second particulate matter; m is the temperature compensation ratio; T is the current bottom temperature of the cookware; and T0 is the scorching threshold temperature.

[0017] Optionally, after determining that the current cookware poses a risk of burning, the following steps are also included:

[0018] The actual concentration of the first particulate matter in the current oil fume is obtained using the first particulate matter detection module;

[0019] The corresponding concentration percentage of the second particulate matter is determined based on the actual concentration of the second particulate matter, including:

[0020] The corresponding concentration ratio of the second particulate matter is determined based on the actual concentration of the first particulate matter and the actual concentration of the second particulate matter.

[0021] Optionally, whether the cookware is scorching can be determined based on the actual concentration of the second particulate matter, the rate of increase in particulate matter concentration, the proportion of the second particulate matter concentration, and the rate of temperature increase, including:

[0022] If the actual concentration of the second particulate matter is greater than or equal to the particulate matter concentration threshold, and / or the rate of increase of the particulate matter concentration is greater than or equal to the concentration rate threshold, then it is determined whether the current cookware is scorched based on the proportion of the second particulate matter concentration and the rate of increase of the temperature.

[0023] If the actual concentration of the second particulate matter is less than the particulate matter concentration threshold, and the rate of increase of the particulate matter concentration is less than the concentration rate threshold, then continue to obtain the concentration of the second-sized particulate matter in the current oil fume.

[0024] Optionally, determining whether the cookware is burning based on the concentration ratio of the second particulate matter and the rate of temperature rise includes:

[0025] If the rate of temperature rise is less than the temperature rate threshold, then continue to obtain the concentration of particulate matter with the second particle size in the current oil fume.

[0026] If the rate of temperature rise is greater than or equal to the temperature rate threshold, and the proportion of the second particulate matter concentration is greater than or equal to the particulate matter concentration proportion threshold, then it is determined that the current cookware is scorched.

[0027] If the rate of temperature rise is greater than or equal to the temperature rate threshold, and the proportion of the second particulate matter concentration is less than the proportion of the particulate matter concentration threshold, then it is determined that the current cookware has not scorched.

[0028] Optionally, whether the cookware is scorching can be determined based on the actual concentration of the second particulate matter, the rate of increase in particulate matter concentration, the proportion of the second particulate matter concentration, and the rate of temperature increase, including:

[0029] If any of the following conditions are met: the actual concentration of the second particulate matter is greater than or equal to the particulate matter concentration threshold and / or the particulate matter concentration rise rate is greater than or equal to the concentration rate threshold, the temperature rise rate is greater than or equal to the temperature rate threshold, and the proportion of the second particulate matter concentration is greater than or equal to the particulate matter concentration proportion threshold, then it is determined that the current cookware has not scorched and the risk of scorching is low.

[0030] If any two of the following conditions are met: the actual concentration of the second particulate matter is greater than or equal to the particulate matter concentration threshold and / or the particulate matter concentration rise rate is greater than or equal to the concentration rate threshold, the temperature rise rate is greater than or equal to the temperature rate threshold, and the proportion of the second particulate matter concentration is greater than or equal to the particulate matter concentration proportion threshold, then it is determined that the current cookware has not scorched and there is a high risk of scorching.

[0031] If the actual concentration of the second particulate matter is greater than or equal to the particulate matter concentration threshold and / or the rate of increase of particulate matter concentration is greater than or equal to the concentration rate threshold, the rate of increase of temperature is greater than or equal to the temperature rate threshold, and the proportion of the second particulate matter concentration is greater than or equal to the proportion of particulate matter concentration, then it is determined that the current cookware has scorched.

[0032] According to another aspect of the present invention, a scorch pot detection device is provided. The scorch pot detection device includes a fan, a first channel valve, a second channel valve, a first detection channel, a second detection channel, a first particulate matter detection module disposed in the first detection channel, and a second particulate matter detection module disposed in the second detection channel. The first particulate matter detection module is used to detect the concentration of particulate matter with a first particle size, and the second particulate matter detection module is used to detect the concentration of particulate matter with a second particle size. The first particle size is larger than the second particle size. The scorch pot detection device is used to implement the scorch pot detection method of any embodiment of the present invention.

[0033] According to another aspect of the present invention, a smoke hood is provided, which includes a scorch detection device according to any embodiment of the present invention.

[0034] The technical solution of this invention relates to a scorching detection method applied to a range hood. The range hood includes a first particulate matter detection module and a second particulate matter detection module. The first particulate matter detection module is used to detect the concentration of particulate matter with a first particle size, and the second particulate matter detection module is used to detect the concentration of particulate matter with a second particle size. The first particle size is larger than the second particle size. The scorching detection method includes: after activating the first particulate matter detection module and deactivating the second particulate matter detection module, acquiring the current bottom temperature of the cookware, determining the corresponding temperature rise rate based on the current bottom temperature, and judging whether there is a risk of scorching in the cookware. This allows for a rapid response to scorching situations, that is, timely detection and corresponding actions when scorching occurs, thus preventing scorching. The situation worsens; furthermore, after determining that the current cookware poses a risk of scorching, the second particulate matter detection module is activated, and the actual concentration of the second particulate matter in the current oil fume is obtained using the second particulate matter detection module. By obtaining the concentration of particulate matter within different particle size ranges through different detection methods, the oil fume particulate matter generated when scorching occurs can be detected more effectively; furthermore, the corresponding particulate matter concentration rise rate and the proportion of the second particulate matter concentration are determined based on the actual concentration of the second particulate matter, the particulate matter concentration rise rate, the proportion of the second particulate matter concentration, and the temperature rise rate to determine whether the current cookware has scorched. Multiple factors work together to determine whether scorching has occurred, achieving more accurate detection of scorching and reducing the false judgment rate.

[0035] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of the present invention, nor is it intended to limit the scope of the invention. Other features of the invention will become readily apparent from the following description. Attached Figure Description

[0036] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0037] Figure 1 This is a flowchart of a method for detecting burnt pots according to an embodiment of the present invention;

[0038] Figure 2 This is a flowchart of a method for detecting burnt pots according to an embodiment of the present invention;

[0039] Figure 3This is a flowchart of a method for detecting burnt pots according to an embodiment of the present invention;

[0040] Figure 4 This is a schematic diagram of a scorch pot detection device provided according to an embodiment of the present invention;

[0041] Figure 5 This is a structural main perspective view of a range hood provided according to an embodiment of the present invention;

[0042] Figure 6 This is a structural side perspective view of a range hood provided according to an embodiment of the present invention. Detailed Implementation

[0043] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0044] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0045] Figure 1 The present invention provides a flowchart of a method for detecting burnt food. This embodiment can be applied to situations where burnt food is detected more accurately. The method for detecting burnt food can be executed by a burnt food detection device, which can be implemented in hardware and / or software and can be configured in a tobacco machine.

[0046] The method for detecting burnt food in a cooking pot according to the present invention is applied to a range hood. The range hood includes a first particulate matter detection module and a second particulate matter detection module. The first particulate matter detection module is used to detect the concentration of particulate matter with a first particle size. The particulate matter with the first particle size is oil fume particles with a particle size in the range of 0.3μm to 10μm generated during cooking. The first particulate matter detection module can be implemented using an infrared emitting device or a traditional PM2.5 module, etc. The second particulate matter detection module is used to detect the concentration of particulate matter with a second particle size. The particulate matter with the second particle size is oil fume particles with a particle size in the range of 0.05μm to 0.3μm generated during cooking. The second particulate matter detection module can be implemented using an ultraviolet emitting device or a PM0.1 module, etc. It is known that the first particle size is larger than the second particle size. This embodiment does not impose any special restrictions on the implementation of the first particulate matter detection module and the second particulate matter detection module.

[0047] like Figure 1 As shown, the method for detecting burnt pots includes:

[0048] S110. After starting the first particulate matter detection module and turning off the second particulate matter detection module, obtain the current bottom temperature of the pot, determine the corresponding temperature rise rate based on the current bottom temperature, and determine whether there is a risk of the pot burning.

[0049] In this embodiment, after the range hood starts working, it begins to detect the current concentration of particulate matter in the cooking fumes, and then confirms whether the cookware is burning.

[0050] Under normal cooking conditions, the oil fume particles generated are mainly in the range of 0.3μm to 10μm in diameter, which is the range of particle concentration that the first particle detection module can detect. Under these conditions, the possibility of scorching is relatively small, and the proportion of oil fume particles in the range of 0.05μm to 0.3μm in diameter is also relatively small. Therefore, using only the first particle detection module is sufficient to meet the requirements for oil fume particle detection. That is, at this time, only the first particle detection module is activated and the second particle detection module is turned off.

[0051] After activating the first particulate matter detection module and deactivating the second particulate matter detection module, the current bottom temperature of the cookware is obtained. The current bottom temperature of the cookware refers to the temperature of the bottom of the cookware detected in real time. The current bottom temperature of the cookware can be obtained through temperature detection methods such as the temperature sensor in the center of the cookware, the temperature detection function built into the cookware, or the infrared temperature sensing function built into the range hood. This embodiment does not impose any special restrictions on the specific method of obtaining the bottom temperature of the cookware.

[0052] Specifically, the risk of scorching is determined by whether the current bottom temperature of the pot is greater than or equal to the scorching threshold temperature. If the current bottom temperature of the pot is greater than or equal to the scorching threshold temperature, it is determined that the current pot is at risk of scorching. If the current bottom temperature of the pot is less than the scorching threshold temperature, the bottom temperature of the pot is monitored.

[0053] The scorch threshold temperature can be selected and set according to the scorch detection requirements. Different values ​​can be set for different recipes. For example, if the recipe is for vegetables, the scorch threshold temperature can be set lower because vegetables are more prone to scorching. Conversely, if the recipe is for meat, the scorch threshold temperature can be set relatively higher.

[0054] As we know, during stir-frying or high-heat cooking, the user continuously stirs the ingredients in the pot, causing their position to constantly change. The ingredients are generally in a state of even heating equilibrium. These cooking actions usually don't last long, so the pot's temperature doesn't rise continuously. Furthermore, during deep-frying, the large amount of oil in the pot continuously absorbs heat from the bottom, keeping the pot's bottom temperature relatively stable. However, in cases of scorching, the ingredients haven't moved sufficiently and can't absorb enough heat from the bottom. The pot's bottom temperature then remains elevated without significant fluctuations. Therefore, by observing the rate of temperature rise at the bottom of the pot, one can determine whether the pot is scorched.

[0055] The temperature rise rate is used to reflect the current temperature change at the bottom of the cookware. The temperature rise rate is determined by the temperature difference at the bottom collected at the set time interval and the set time interval. Specifically: K = ΔT / t0, where K is the temperature rise rate, ΔT is the temperature difference at the bottom collected at the set time interval, and t0 is the set time length. The larger the temperature rise rate, the faster the temperature rises.

[0056] S120. After determining that there is a risk of scorching in the current cookware, the second particulate matter detection module is activated, and the actual concentration of the second particulate matter in the current oil fume is obtained using the second particulate matter detection module.

[0057] Under normal cooking conditions, only the first particulate matter detection module is used for detection. Once a risk of scorching is detected in the cookware, the second particulate matter detection module is then activated to meet the requirements for detecting particulate matter in cooking fumes. It should also be noted that, to ensure more accurate detection of particulate matter in cooking fumes, both the first and second particulate matter detection modules can be activated simultaneously under normal cooking conditions.

[0058] The actual concentration of the second particulate matter in the current oil fume is calculated in real time by the second particulate matter detection module according to the set time interval. The actual concentration of the second particulate matter is the concentration of particulate matter in the oil fume that can be detected by the second particulate matter detection module, that is, the concentration of oil fume particulate matter mainly in the range of 0.05μm to 0.3μm.

[0059] Specifically, the second particulate matter detection module is used to obtain the current concentration of the second particulate matter in the current cooking fumes, and the actual concentration of the second particulate matter in the current cooking fumes is determined based on the current concentration of the second particulate matter and the current temperature of the bottom of the cookware.

[0060] The current concentration of the second particulate matter is the concentration obtained in real time by the second particulate matter detection module at set time intervals. To make the detection of scorching more accurate, considering that the higher the temperature of the pot, the greater the possibility of scorching, and that at higher temperatures, oil fume particles may exhibit thermophoresis (for example, oil fume particles will actively avoid the laser light source and move towards the cold wall surface of the module, causing some particles to go undetected), the current concentration of the second particulate matter will be lower than expected. Furthermore, considering that with the same current concentration of the second particulate matter, the higher the temperature inside the pot, the greater the risk of scorching, a certain temperature compensation should be applied when calculating the current concentration of the second particulate matter to prevent scorching from occurring in advance.

[0061] Based on the above, the actual concentration of the second particulate matter in the current oil fume is determined by the following formula: C1 = m × c1 × (T - T0), where C1 is the actual concentration of the second particulate matter, c1 is the current concentration of the second particulate matter, m is the temperature compensation ratio, T is the current temperature of the bottom of the cookware, and T0 is the scorching threshold temperature.

[0062] The temperature compensation ratio m can be calculated by taking into account the risk of coking pot and the severity of thermophoresis. In this embodiment, no special restrictions are placed on the specific value of the temperature compensation ratio m.

[0063] S130. Determine the corresponding rate of increase of particulate matter concentration and the proportion of second particulate matter concentration based on the actual concentration of second particulate matter, and determine whether the current pot will burn based on the actual concentration of second particulate matter, the rate of increase of particulate matter concentration, the proportion of second particulate matter concentration and the rate of increase of temperature.

[0064] Among them, the proportion of oil fume particles of different sizes is different. The proportion of the second particulate matter concentration can more clearly reflect the difference in particulate matter concentration between scorching and misjudgment. The proportion of the second particulate matter concentration can be used as the main basis for judging whether scorching has occurred.

[0065] As can be seen, after determining that there is a risk of scorching in the cookware, the first particulate matter detection module is used to obtain the actual concentration of the first particulate matter in the current cooking fumes. Then, based on the actual concentrations of the first and second particulate matter, the corresponding proportion of the second particulate matter concentration is determined. The higher the proportion of the second particulate matter concentration, the lower the relative concentration of the first particulate matter in the current cooking fumes, and the greater the likelihood of scorching.

[0066] The particulate matter concentration rise rate is the rate of increase obtained by calculating the actual concentration of the second particulate matter. The particulate matter concentration rise rate is the difference between the actual concentrations of the second particulate matter collected at a set time interval. Specifically: k = ΔC1 / t0, where k is the particulate matter concentration rise rate and ΔC1 is the difference between the actual concentrations of the second particulate matter collected at a set time interval. The larger the particulate matter concentration rise rate k is, the faster the actual concentration of the second particulate matter rises.

[0067] Specifically, if the actual concentration of the second particulate matter is greater than or equal to the particulate matter concentration threshold, and the rate of increase in particulate matter concentration is greater than or equal to the concentration rate threshold, then the probability of scorching in the cookware is further determined based on the proportion of the second particulate matter concentration and the rate of temperature increase. Similarly, if the actual concentration of the second particulate matter is greater than or equal to the particulate matter concentration threshold, or the rate of increase in particulate matter concentration is greater than or equal to the concentration rate threshold, then the probability of scorching in the cookware is further determined based on the proportion of the second particulate matter concentration and the rate of temperature increase. In other words, if the actual concentration of the second particulate matter is high or rising rapidly, posing a risk of scorching, then the probability of scorching in the cookware is determined based on the proportion of the second particulate matter concentration and the rate of temperature increase.

[0068] If the actual concentration of the second particulate matter is less than the particulate matter concentration threshold, and the rate of increase of the particulate matter concentration is less than the concentration rate threshold, then continue to obtain the concentration of the second-sized particulate matter in the current oil fume.

[0069] The particulate matter concentration threshold and concentration rate threshold can both be selected and set based on factors such as the risk of burnt food. In this embodiment, no special restrictions are placed on the specific values ​​of the particulate matter concentration threshold and concentration rate threshold.

[0070] Based on the above, in some misjudgment actions (such as stir-frying, deep-frying, and quick-frying), the temperature of the cookware may rise rapidly. In order to distinguish this from scorching, it is necessary to confirm the temperature fluctuation. Specifically: if the temperature rise rate is less than the temperature rate threshold, it means that the temperature is within the normal fluctuation range and the risk of scorching is low. Continue to obtain the concentration of the second-diameter particulate matter in the current oil fume; if the temperature rise rate is greater than or equal to the temperature rate threshold, it means that the temperature is rising continuously at this time and the risk of scorching is high. Continue to determine whether the cookware is scorching based on the proportion of the second-diameter particulate matter concentration.

[0071] The temperature rate threshold is selected and set based on the obvious difference in particulate matter concentration between the scorching and the false judgment action. In this embodiment, no special restrictions are placed on the specific value of the temperature rate threshold.

[0072] Furthermore, if the concentration of the second particulate matter is greater than or equal to the particulate matter concentration threshold, it indicates that the risk of scorching is already very high, and the cookware is confirmed to have scorched. If the concentration of the second particulate matter is less than the particulate matter concentration threshold, it cannot be determined that scorching has occurred, and the cookware is confirmed not to have scorched. In this case, although the possibility of scorching is high, it cannot be completely confirmed that scorching has occurred. A prompt can be issued to remind the user to adjust the temperature and stir the food in time to avoid scorching.

[0073] The particulate matter concentration percentage threshold is selected and set based on the obvious difference in particulate matter concentration between the scorched pot and the misjudged action. In this embodiment, no special restrictions are placed on the specific value of the particulate matter concentration percentage threshold.

[0074] It is understood that, in one embodiment, whether the current cookware is burning can be determined mainly by three conditions: the first condition is that the actual concentration of the second particulate matter is greater than or equal to the particulate matter concentration threshold and / or the particulate matter concentration rise rate is greater than or equal to the concentration rate threshold; the second condition is that the temperature rise rate is greater than or equal to the temperature rate threshold; and the third condition is that the proportion of the second particulate matter concentration is greater than or equal to the particulate matter concentration proportion threshold. All three conditions can be determined simultaneously, specifically: if the actual concentration of the second particulate matter is greater than or equal to the particulate matter concentration threshold and / or the particulate matter concentration rise rate is greater than or equal to the concentration rate threshold, the temperature rise rate is greater than or equal to the temperature rate threshold, and the proportion of the second particulate matter concentration is greater than or equal to the particulate matter concentration proportion threshold, then... If one condition is met, it is determined that the current cookware has not scorched and the risk of scorching is low. If any two of the following conditions are met: the actual concentration of the second particulate matter is greater than or equal to the particulate matter concentration threshold and / or the particulate matter concentration rise rate is greater than or equal to the concentration rate threshold, the temperature rise rate is greater than or equal to the temperature rate threshold, and the proportion of the second particulate matter concentration is greater than or equal to the particulate matter concentration proportion threshold, it is determined that the current cookware has not scorched and the risk of scorching is high. If the actual concentration of the second particulate matter is greater than or equal to the particulate matter concentration threshold and / or the particulate matter concentration rise rate is greater than or equal to the concentration rate threshold, the temperature rise rate is greater than or equal to the temperature rate threshold, and the proportion of the second particulate matter concentration is greater than or equal to the particulate matter concentration proportion threshold, it is determined that the current cookware has scorched.

[0075] The technical solution of this invention provides a method for detecting burnt food in a range hood. The range hood includes a first particulate matter detection module and a second particulate matter detection module. The first particulate matter detection module is used to detect the concentration of particulate matter with a first particle size, and the second particulate matter detection module is used to detect the concentration of particulate matter with a second particle size. The first particle size is larger than the second particle size. The method for detecting burnt food in a range hood includes: after activating the first particulate matter detection module and deactivating the second particulate matter detection module, acquiring the current bottom temperature of the cookware, determining the corresponding temperature rise rate based on the current bottom temperature, and determining whether the cookware is at risk of burnt food; after determining that the cookware is at risk of burnt food, activating the second particulate matter detection module and acquiring the actual concentration of the second particulate matter in the current fumes using the second particulate matter detection module; determining the corresponding particulate matter concentration rise rate and the proportion of the second particulate matter concentration based on the actual concentration of the second particulate matter, the particulate matter concentration rise rate, the proportion of the second particulate matter concentration, and the temperature rise rate; and determining whether the cookware is at risk of burnt food in the current range hood. The embodiments of the present invention solve the problems of slow response, inaccurate detection of scorching, high false positive rate, and poor versatility of current scorching detection methods. By using multiple factors to jointly determine whether scorching has occurred, the invention achieves more accurate detection of scorching and reduces the false positive rate.

[0076] Based on the above embodiments, Figure 2 This is a flowchart illustrating a method for detecting burnt pot contents according to an embodiment of the present invention. It simultaneously determines whether the pot is burnt based on three conditions, comprehensively assessing the burnt situation. Compared to using only a single condition, the multi-condition approach provides more accurate particulate matter detection results and greater flexibility, offering an optional implementation method. For example... Figure 2 As shown, the method for detecting burnt pots includes:

[0077] S210, Start the first particulate matter detection module and shut down the second particulate matter detection module.

[0078] S220. Obtain the current bottom temperature of the pot and determine the corresponding temperature rise rate based on the current bottom temperature.

[0079] During normal cooking, numerous actions generate a large amount of carbonized particles with a diameter of 0.1μm. Examples include stir-frying (adding spices to hot oil), deep-frying at high temperatures (especially during double frying when particle concentration is even higher), and stir-frying over high heat. It's difficult to distinguish these particles from those produced during scorching simply by detecting their characteristics; these actions are referred to as misjudgment actions. To avoid misjudging scorching, it's necessary to differentiate these normal cooking actions (misjudgment actions) from scorching. Through actual cooking processes, it can be seen that misjudgment actions and scorching differ significantly in two main aspects: firstly, the temperature changes at the bottom of the pan are different; and secondly, the proportion of particles of different sizes is different.

[0080] Based on this, this embodiment combines the different temperature fluctuations at the bottom of the pot during normal cooking and when the pot is scorched. During normal cooking, the temperature fluctuates up and down, while when the pot is scorched, it rises continuously. By observing the different rates of temperature rise, the situation of scorching can be determined, thus avoiding misjudgment of scorching.

[0081] S230. Determine whether there is a risk of burning the pot based on the current temperature of the bottom of the pot. If yes, proceed to step S240; otherwise, proceed to step S220.

[0082] Specifically, if the current bottom temperature of the pot is lower than the scorching threshold temperature, then the current bottom temperature of the pot will continue to be detected, that is, return to step S220.

[0083] S240. After determining that there is a risk of scorching in the current cookware, the second particulate matter detection module is activated, and the actual concentration of the second particulate matter in the current oil fume is obtained using the second particulate matter detection module.

[0084] Specifically, if the current temperature of the bottom of the cookware is greater than or equal to the scorching threshold temperature, it is determined that there is a risk of scorching in the cookware, and the second particulate matter detection module is activated. This allows for the flexible activation and deactivation of the first and second particulate matter detection modules according to the needs of oil fume particulate matter detection, avoiding the accumulation of grease and water vapor and the generation of errors.

[0085] S250. Determine the corresponding rate of increase of particulate matter concentration and the proportion of the second particulate matter concentration based on the actual concentration of the second particulate matter.

[0086] Based on the above, the proportion of particulate matter differs between normal cooking and scorching. During normal cooking, the proportion of oil fume particles with a diameter in the range of 0.05μm to 0.3μm is relatively small, while during scorching, the proportion of oil fume particles in the same range is relatively large. This difference in the proportion of oil fume particles allows for the determination of whether scorching has occurred. In other words, to more clearly demonstrate the difference in particulate matter concentration between scorching and misjudgment, this solution uses the second particulate matter concentration proportion as the primary basis for determining whether scorching has occurred.

[0087] Specifically, the corresponding concentration ratio of the second particulate matter is determined based on the actual concentration of the first particulate matter and the actual concentration of the second particulate matter, R1=C1 / (C1+C2), where R1 is the concentration ratio of the second particulate matter, C2 is the actual concentration of the first particulate matter, and C1 is the actual concentration of the second particulate matter.

[0088] It should also be noted that the actual concentration of the first particulate matter C2 and the actual concentration of the second particulate matter C1 can be obtained by the same method, that is, by using the following formula to determine the actual concentration of the first particulate matter C2 in the current oil fume: C2=m×c2×(T-T0), where c2 is the actual concentration of the first particulate matter, c2 is the current concentration of the first particulate matter, m is the temperature compensation ratio, T is the current temperature of the bottom of the cookware, and T0 is the scorching threshold temperature.

[0089] In other words, the corresponding concentration ratio of the second particulate matter can also be obtained by the following formula: R1=c1 / (c1+c2), where c1 is the current concentration of the second particulate matter and c2 is the current concentration of the first particulate matter.

[0090] S260. Determine the corresponding rate of increase of particulate matter concentration and the proportion of second particulate matter concentration based on the actual concentration of second particulate matter, and determine whether the current pot will burn based on the actual concentration of second particulate matter, the rate of increase of particulate matter concentration, the proportion of second particulate matter concentration and the rate of increase of temperature.

[0091] Specifically, if any of the following conditions are met: the actual concentration of the second particulate matter is greater than or equal to the particulate matter concentration threshold and / or the particulate matter concentration rise rate is greater than or equal to the concentration rate threshold, the temperature rise rate is greater than or equal to the temperature rate threshold, and the proportion of the second particulate matter concentration is greater than or equal to the particulate matter concentration proportion threshold, then it is determined that the current cookware has not scorched and the risk of scorching is low, meaning that no corresponding feedback is required.

[0092] If any two of the following conditions are met: the actual concentration of the second particulate matter is greater than or equal to the particulate matter concentration threshold and / or the particulate matter concentration rise rate is greater than or equal to the concentration rate threshold, the temperature rise rate is greater than or equal to the temperature rate threshold, and the proportion of the second particulate matter concentration is greater than or equal to the particulate matter concentration proportion threshold, then it is determined that the current cookware has not scorched, but there is a high risk of scorching, and a prompt will be issued to remind the user to resolve the issue in a timely manner.

[0093] If the actual concentration of the second particulate matter is greater than or equal to the particulate matter concentration threshold and / or the rate of increase of particulate matter concentration is greater than or equal to the concentration rate threshold, the rate of increase of temperature is greater than or equal to the temperature rate threshold, and the proportion of the second particulate matter concentration is greater than or equal to the proportion of particulate matter concentration, it indicates that the risk of scorching is very high, and it is determined that the current cookware has scorched.

[0094] The technical solution of this invention combines multiple conditions, such as the actual concentration of the second particulate matter, the rate of increase in particulate matter concentration, the proportion of the second particulate matter concentration, and the rate of temperature increase, to comprehensively judge the situation of scorching in the cooking pot and adopt different response plans according to different risks of scorching. Compared with judging based on a single condition, the detection results of this invention, with the combination of multiple conditions, are more accurate and more flexible. At the same time, it can also make certain compensations for the calculation of oil fume particulate matter concentration according to different temperature conditions, making it more in line with the actual situation.

[0095] Based on the above embodiments, Figure 3 This is a flowchart illustrating a method for detecting burnt pots according to an embodiment of the present invention. It sequentially determines whether the pot has burnt pot characteristics based on the three conditions described above, improving the efficiency and flexibility of burnt pot detection and providing an optional implementation method. For example... Figure 3 As shown, the method for detecting burnt pots includes:

[0096] S310, Start the first particulate matter detection module and shut down the second particulate matter detection module.

[0097] S320. Obtain the current bottom temperature of the pot and determine the corresponding temperature rise rate based on the current bottom temperature.

[0098] S321. Determine whether there is a risk of burning the pot based on the current temperature of the bottom of the pot. If yes, proceed to step S330; otherwise, proceed to step S320.

[0099] Specifically, if the current bottom temperature of the pot is lower than the scorching threshold temperature, then the current bottom temperature of the pot will continue to be detected, and the process will return to step S320.

[0100] S330. After determining that there is a risk of scorching in the current cookware, the second particulate matter detection module is activated.

[0101] Specifically, if the current temperature of the bottom of the cookware is greater than or equal to the scorching threshold temperature, it is determined that there is a risk of scorching in the cookware, and the second particulate matter detection module is activated. This allows for the flexible activation and deactivation of the first and second particulate matter detection modules according to the needs of oil fume particulate matter detection, avoiding the accumulation of grease and water vapor and the generation of errors.

[0102] S331. Use the second particulate matter detection module to obtain the actual concentration of the second particulate matter in the current oil fume.

[0103] S332. Determine the corresponding rate of increase of particulate matter concentration and the proportion of the second particulate matter concentration based on the actual concentration of the second particulate matter.

[0104] S340. Determine whether the actual concentration of the second particulate matter is greater than or equal to the particulate matter concentration threshold, and / or whether the rate of increase of particulate matter concentration is greater than or equal to the concentration rate threshold. If yes, proceed to step S350; otherwise, proceed to step S331.

[0105] Specifically, if the actual concentration of the second particulate matter is greater than or equal to the particulate matter concentration threshold and the rate of increase of the particulate matter concentration is greater than or equal to the concentration rate threshold, or if the actual concentration of the second particulate matter is greater than or equal to the particulate matter concentration threshold, or if the rate of increase of the particulate matter concentration is greater than or equal to the concentration rate threshold, then it is necessary to further determine whether a scorching situation has occurred based on other judgment conditions, i.e., to execute step S350.

[0106] Conversely, if the actual concentration of the second particulate matter is less than the particulate matter concentration threshold and the rate of increase of the particulate matter concentration is less than the concentration rate threshold, then return to step S331, that is, continue to obtain the concentration of the second-sized particulate matter in the current oil fume.

[0107] S350. Determine whether the temperature rise rate is greater than or equal to the temperature rate threshold. If yes, proceed to step S360; otherwise, proceed to step S331.

[0108] Specifically, if the rate of temperature rise is less than the temperature rate threshold, it indicates that the temperature is within the normal fluctuation range and the risk of scorching is low. Then, return to step S331 to continue obtaining the concentration of the second-diameter particulate matter in the current oil fume.

[0109] If the rate of temperature rise is greater than or equal to the temperature rate threshold, it indicates that the temperature is rising continuously and the risk of scorching is high. In this case, the determination of whether the pot will scorch is made based on the concentration ratio of the second particulate matter is continued, i.e., step S360 is executed.

[0110] Additionally, it should be noted that the temperature rise rate is used to reflect whether the current pot temperature is rising rapidly. Not only can a single temperature rise rate be used for comparison to determine if scorching has occurred, but the temperature rise rate can also be continuously acquired. Based on whether the temperature rise rate is consistently high (i.e., multiple detections of a temperature rise rate greater than or equal to a temperature rate threshold), the number of times the temperature rise rate is greater than or equal to the temperature rate threshold, as well as the number of times the temperature rise rate is less than the temperature rate threshold, can be counted. Based on the percentage of temperature rise rates greater than or equal to the temperature rate threshold, it can be determined whether the pot is scorching. If the percentage of temperature rise rates greater than or equal to the temperature rate threshold is significantly higher than the percentage of temperature rise rates less than the temperature rate threshold, it indicates that the condition for a sustained temperature rise is met. Conversely, if the two percentages are roughly equal, it indicates that the temperature is fluctuating and the condition for a sustained temperature rise is not met. In summary, this embodiment does not restrict the specific method for determining whether a consistently high temperature rise rate is valid.

[0111] S360. Determine whether the concentration ratio of the second particulate matter is greater than or equal to the threshold of the concentration ratio of particulate matter. If yes, proceed to step S361; otherwise, proceed to step S362.

[0112] S361. Confirm that the current cookware is burnt.

[0113] Specifically, if the concentration of the second particulate matter is greater than or equal to the threshold of particulate matter concentration, it indicates that the risk of scorching is already very high. In this case, it is determined that the cookware has scorched. The situation can be handled by appropriately reducing the firepower of the stove, increasing the air volume of the range hood, or issuing a scorching alarm to the user.

[0114] S362. Confirm that the current cookware has not burned.

[0115] Specifically, if the concentration of the second particulate matter is less than the particulate matter concentration threshold, it cannot be determined that the pot has burned. In this case, although the possibility of burning is high, it cannot be completely confirmed that burning has occurred. A prompt can be issued to remind the user to adjust the temperature and stir the food in time to avoid burning.

[0116] The technical solution of this invention determines scorching of the pot based on multiple conditions, including the actual concentration of the second particulate matter, the rate of increase of the particulate matter concentration, the proportion of the second particulate matter concentration, and the rate of increase of the temperature. Different solutions are adopted according to different risks of scorching. Compared with the judgment based on a single condition, the scorching detection results of this invention are more accurate under the combination of multiple conditions. The sequential judgment of multiple conditions balances readability, efficiency and flexibility through structured design. At the same time, it can also make certain compensation for the calculation of oil fume particulate matter concentration according to the different temperatures at the bottom of the pot, which is more in line with the actual situation.

[0117] Based on the above embodiments, Figure 4 This is a schematic diagram of a scorch pot detection device provided in an embodiment of the present invention. See also: Figure 4 As shown, the coke pot detection device 100 includes a fan 110, a first channel valve 120, a second channel valve 130, a first detection channel 121, a second detection channel 131, a first particulate matter detection module 122 disposed in the first detection channel 121, and a second particulate matter detection module 132 disposed in the second detection channel 131. The first particulate matter detection module 122 is used to detect the concentration of particulate matter with a first particle size, and the second particulate matter detection module 132 is used to detect the concentration of particulate matter with a second particle size. The first particle size is larger than the second particle size. The coke pot detection device 100 is used to implement the coke pot detection method provided in any embodiment of the present invention.

[0118] The scorched oil pan detection device 100 provided by this invention adopts a dual-channel scheme. The first detection channel 121 can detect oil fume particles with a particle size ranging from 0.3μm to 10μm. That is, the first particulate matter detection module 122 set in the first detection channel 121 performs the corresponding particulate matter concentration detection. The first detection channel 121 can effectively detect oil fume particles with a particle size ranging from 0.3μm to 10μm. For example, if the first particulate matter detection module 122 in the first detection channel 121 is an infrared emitting device, then infrared scattering is used to detect the particulate matter concentration in the smoke.

[0119] The second detection channel 131 can detect the concentration of oil fume particles with a diameter in the range of 0.05μm to 0.3μm. This is achieved by using the first particulate matter detection module 122 located within the first detection channel 121 to detect the corresponding particulate matter concentration. The second detection channel 131 can effectively detect the organic carbon component in oil fume particles with a diameter in the range of 0.05μm to 0.3μm, making it highly suitable for detecting scorched oil. For example, the organic carbon in oil fume particles with a diameter in the range of 0.05μm to 0.3μm will produce fluorescence radiation of a specific wavelength under ultraviolet light excitation. By limiting the detection of this fluorescence radiation, the concentration of oil fume particles with a diameter in the range of 0.05-0.3μm can be indirectly detected. Therefore, the second particulate matter detection module 132 located within the second detection channel 131 uses an ultraviolet emitting device, which can detect the concentration of oil fume particles with a diameter in the range of 0.05μm to 0.3μm using ultraviolet fluorescence.

[0120] It should be noted that this embodiment is not limited to... Figure 4 The dual-channel structure shown can also meet the requirements for scorched pot detection by simultaneously installing PM2.5 and PM0.1 detection modules on the smoke machine. Furthermore, in the scorched pot detection device 100, the first particulate matter detection module 122 in the first detection channel 121 can be an infrared emitting device, and the corresponding second particulate matter detection module 132 in the second detection channel 131 can be a traditional PM0.1 module. Alternatively, the first particulate matter detection module 122 in the first detection channel 121 can be a traditional PM2.5 module, and the second particulate matter detection module 132 in the second detection channel 131 can be an ultraviolet emitting device. This embodiment does not impose any special restrictions on the specific implementation of the first particulate matter detection module 122 in the first detection channel 121 and the second particulate matter detection module 132 in the second detection channel 131.

[0121] See also Figure 4As shown, the working process of the scorch pot detection device 100 is as follows: driven by its built-in fan 110, the oil fumes in the oil fume detection area are sucked into the scorch pot detection device 100, thereby analyzing the particulate matter of the oil fumes. The first detection channel 121 and the second detection channel 131 are equipped with independent valve structures. The opening and closing of the first channel valve 120 determines whether oil fumes can enter the first detection channel 121, and the opening and closing of the second channel valve 130 determines whether oil fumes can enter the second detection channel 131. When the function of this channel is not needed, the corresponding channel valve is closed to avoid excessive accumulation of dust, grease and other impurities in the detection channel, which would affect the overall lifespan of the scorch pot detection device 100.

[0122] Furthermore, within the first detection channel 121, after passing through the first channel valve 120, the oil fumes enter the receiving area of ​​the first particulate matter detection module 122. At this time, the first particulate matter detection module 122 can be driven to work by the laser drive circuit of the smoke machine or the laser drive circuit built into the burnt pot detection device 100, emitting signals to the oil fume particles in the receiving area of ​​the first particulate matter detection module 122. The first signal processing circuit 123 will calculate the concentration of oil fume particles with a particle size in the range of 0.3μm to 10μm based on the scattering intensity of the oil fume particles.

[0123] In the second detection channel 131, after passing through the second channel valve 130, the oil fumes enter the receiving area of ​​the second particulate matter detection module 132. At this time, the second particulate matter detection module 132 can be driven to work by the laser drive circuit of the smoke machine or the laser drive circuit of the burnt pot detection device 100, and the signal is emitted to the oil fume particles in the receiving area of ​​the second particulate matter detection module 132. The second signal processing circuit 133 will calculate the concentration of oil fume particles with a particle size in the range of 0.05μm to 0.3μm based on the fluorescence reflection intensity of the oil fume particles.

[0124] Based on the above, after obtaining the concentration of oil fume particles with a particle size in the range of 0.05μm to 0.3μm through the second detection channel 131, the range hood can also determine whether a scorching situation has occurred.

[0125] Based on the above embodiments, Figure 5 This is a front perspective view of a smoke hood provided in an embodiment of the present invention. Figure 6 This is a side perspective view of a smoke hood provided in an embodiment of the present invention. The smoke hood includes a scorch pot detection device 100 according to any embodiment of the present invention.

[0126] See Figure 5 and Figure 6As shown, it can be understood that the scorch detection device 100 in this embodiment is installed inside the range hood to directly obtain information about the oil fumes generated during cooking. Figure 5 and Figure 6 The 100-unit detection device for the burnt pot is not visible from outside the range hood, and... Figure 5 and Figure 6 The installation position of the coke pot detection device 100 is for reference only. That is, this embodiment does not impose any restrictions on the specific installation position or installation method of the coke pot detection device module 100.

[0127] In addition, the scorch pot detection device 100 can be part of the range hood, that is, it can be an integrated design with the range hood, or it can be a separate scorch pot detection device in the above embodiment, which is used in conjunction with the range hood. The above can be set according to the specific model of the range hood and the user's needs. This embodiment does not limit this.

[0128] It should be understood that the various forms of processes shown above can be used, with steps reordered, added, or deleted. For example, the steps described in this invention can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this invention can be achieved, and this is not limited herein.

[0129] The specific embodiments described above do not constitute a limitation on the scope of protection of this invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A method for detecting burnt pots, characterized in that, The scorch pot detection method is applied to a tobacco hood, which includes a first particulate matter detection module and a second particulate matter detection module. The first particulate matter detection module is used to detect the concentration of particulate matter with a first particle size, and the second particulate matter detection module is used to detect the concentration of particulate matter with a second particle size. The first particle size is larger than the second particle size. The scorch pot detection method includes: After activating the first particulate matter detection module and deactivating the second particulate matter detection module, the current bottom temperature of the cookware is obtained, and the corresponding temperature rise rate is determined based on the current bottom temperature, as well as whether there is a risk of the cookware burning. After determining that the current cookware poses a risk of scorching, the second particulate matter detection module is activated, and the actual concentration of the second particulate matter in the current oil fume is obtained using the second particulate matter detection module. The corresponding particulate matter concentration rise rate and the second particulate matter concentration ratio are determined based on the actual concentration of the second particulate matter, and whether the current cookware is scorched is determined based on the actual concentration of the second particulate matter, the particulate matter concentration rise rate, the second particulate matter concentration ratio, and the temperature rise rate.

2. The method for detecting burnt pots according to claim 1, characterized in that, Determining whether there is a risk of burning the pot based on the current pot bottom temperature includes: If the current bottom temperature of the cookware is greater than or equal to the scorching threshold temperature, it is determined that the current cookware is at risk of scorching. If the current bottom temperature of the pot is lower than the scorching threshold temperature, the bottom temperature of the pot will continue to be detected.

3. The method for detecting burnt pots according to claim 1, characterized in that, The second particulate matter detection module is used to obtain the actual concentration of the second particulate matter in the current cooking fumes, including: The second particulate matter detection module is used to obtain the current concentration of the second particulate matter in the current cooking fumes, and the actual concentration of the second particulate matter in the current cooking fumes is determined based on the current concentration of the second particulate matter and the current bottom temperature of the cookware.

4. The method for detecting burnt pots according to claim 3, characterized in that, The actual concentration of the second particulate matter in the current cooking fumes is determined based on the following formula: C1 = m × c1 × (T - T0); Wherein, C1 is the actual concentration of the second particulate matter; c1 is the current concentration of the second particulate matter; m is the temperature compensation ratio; T is the current bottom temperature of the cookware; and T0 is the scorching threshold temperature.

5. The method for detecting burnt pots according to claim 1, characterized in that, After determining that the current cookware poses a risk of burning, the process also includes: The actual concentration of the first particulate matter in the current oil fume is obtained using the first particulate matter detection module. Determining the corresponding concentration percentage of the second particulate matter based on its actual concentration includes: The corresponding concentration ratio of the second particulate matter is determined based on the actual concentration of the first particulate matter and the actual concentration of the second particulate matter.

6. The method for detecting burnt pots according to claim 1, characterized in that, Determining whether the current cookware is burning based on the actual concentration of the second particulate matter, the rate of increase of the particulate matter concentration, the proportion of the second particulate matter concentration, and the rate of temperature increase includes: If the actual concentration of the second particulate matter is greater than or equal to the particulate matter concentration threshold, and / or the rate of increase of the particulate matter concentration is greater than or equal to the concentration rate threshold, then it is determined whether the current cookware is scorched based on the proportion of the second particulate matter concentration and the rate of increase of the temperature. If the actual concentration of the second particulate matter is less than the particulate matter concentration threshold, and the rate of increase of the particulate matter concentration is less than the concentration rate threshold, then the concentration of the second particle size in the current oil fume will continue to be obtained.

7. The method for detecting burnt pots according to claim 6, characterized in that, Determining whether the current cookware is burning based on the second particulate matter concentration ratio and the temperature rise rate includes: If the temperature rise rate is less than the temperature rate threshold, then continue to obtain the concentration of particulate matter of the second particle size in the current oil fume; If the temperature rise rate is greater than or equal to the temperature rate threshold, and the second particulate matter concentration ratio is greater than or equal to the particulate matter concentration ratio threshold, then it is determined that the current cookware has scorched. If the rate of temperature rise is greater than or equal to the temperature rate threshold, and the second particulate matter concentration ratio is less than the particulate matter concentration ratio threshold, then it is determined that the current cookware has not scorched.

8. The method for detecting burnt pots according to claim 1, characterized in that, Determining whether the current cookware is burning based on the actual concentration of the second particulate matter, the rate of increase of the particulate matter concentration, the proportion of the second particulate matter concentration, and the rate of temperature increase includes: If any of the following conditions are met: the actual concentration of the second particulate matter is greater than or equal to the particulate matter concentration threshold and / or the rate of increase of the particulate matter concentration is greater than or equal to the concentration rate threshold, the rate of increase of the temperature is greater than or equal to the temperature rate threshold, and the proportion of the second particulate matter concentration is greater than or equal to the proportion of the particulate matter concentration, then it is determined that the current cookware has not scorched and the risk of scorching is low. If any two of the following conditions are met: the actual concentration of the second particulate matter is greater than or equal to the particulate matter concentration threshold and / or the rate of increase of the particulate matter concentration is greater than or equal to the concentration rate threshold, the rate of increase of the temperature is greater than or equal to the temperature rate threshold, and the proportion of the second particulate matter concentration is greater than or equal to the particulate matter concentration proportion threshold, then it is determined that the current cookware has not scorched and there is a high risk of scorching. If the actual concentration of the second particulate matter is greater than or equal to the particulate matter concentration threshold and / or the rate of increase of the particulate matter concentration is greater than or equal to the concentration rate threshold, the rate of increase of the temperature is greater than or equal to the temperature rate threshold, and the proportion of the second particulate matter concentration is greater than or equal to the proportion of the particulate matter concentration, then it is determined that the current cookware has scorched.

9. A device for detecting burnt pots, characterized in that, The coke pot detection device includes a fan, a first channel valve, a second channel valve, a first detection channel, a second detection channel, a first particulate matter detection module disposed in the first detection channel, and a second particulate matter detection module disposed in the second detection channel. The first particulate matter detection module is used to detect the concentration of particulate matter with a first particle size, and the second particulate matter detection module is used to detect the concentration of particulate matter with a second particle size. The first particle size is larger than the second particle size. The coke pot detection device is used to implement the coke pot detection method according to any one of claims 1-8.

10. A range hood, characterized in that, The smoke machine includes the scorch pot detection device as described in claim 9.

Images