Method for cleaning an extractor hood

Abstract

This invention discloses a cleaning method for a range hood, comprising the steps of: operating the range hood; each time the range hood is operated, obtaining the concentration of oil fume particles at the oil filter, impeller assembly, exhaust hood assembly, and bottom condenser plate assembly during a single operation via a sensing element, and obtaining the cumulative concentration of oil fume particles at least at the oil filter, exhaust hood assembly, and bottom condenser plate assembly based on the single operation oil fume particle concentration; determining whether the oil filter, exhaust hood assembly, and bottom condenser plate assembly need cleaning based on the cumulative oil fume particle concentration, and determining whether the impeller assembly needs cleaning based on the single operation oil fume particle concentration. This method can accurately obtain the amount of oil fume absorbed by the range hood during operation, enabling cleaning prompts based on different user situations, improving the accuracy of cleaning prompts, and achieving on-demand cleaning.

Description

Technical Field

[0001] This invention relates to a method for cleaning range hoods. Background Technology

[0002] To achieve high oil fume separation efficiency and long-lasting high performance, range hoods typically require daily cleaning of their panels and oil filters. Some range hoods have an oil filter cleaning reminder function, which usually reminds users based on the range hood's usage time, fan running time, etc., or provides image comparisons of oil stain conditions.

[0003] Some self-cleaning range hoods also use related devices to clean parts such as impellers, air inlet rings, and volutes to remove grease. However, it is generally recommended that users disassemble the range hood and clean the power system, fan, and other components after one to two years of use.

[0004] It is evident that existing range hood cleaning technologies rely on operating time or usage time to determine whether cleaning is necessary. However, they cannot accurately provide reminders based on the user's actual usage, thus failing to guarantee timely cleaning and avoid over-cleaning. For example, cooking with high levels of oil fumes and cooking with low levels of oil fumes can result in different levels of oil stains on the control panel, power system, and other components. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to overcome the shortcomings of the existing technology in which the cleaning of range hoods cannot accurately provide reminders based on the actual usage of the user, and to provide a cleaning method for range hoods.

[0006] The present invention solves the above-mentioned technical problems through the following technical solution:

[0007] A method for cleaning a range hood, the range hood comprising an oil filter, an impeller assembly, an exhaust hood assembly, and a bottom condenser plate assembly, wherein the oil filter, the impeller assembly, the exhaust hood assembly, and the bottom condenser plate assembly are all provided with sensing elements;

[0008] The cleaning method for the range hood includes the following steps:

[0009] Operate the range hood;

[0010] Each time the range hood is run, the single-run oil fume particle concentration at the oil screen, the impeller assembly, the air outlet assembly, and the bottom condenser plate assembly is obtained through the sensing element, and the cumulative oil fume particle concentration at least at the oil screen, the air outlet assembly, and the bottom condenser plate assembly is obtained through the single-run oil fume particle concentration;

[0011] The cumulative oil fume particle concentration is used to determine whether the oil mesh, the air outlet hood assembly, and the bottom condenser plate assembly need cleaning, and the oil fume particle concentration during a single operation is used to determine whether the impeller assembly needs cleaning.

[0012] In this solution, sensing elements are installed at the oil filter, impeller assembly, exhaust hood assembly, and bottom condenser plate assembly. Each time the range hood is run, these sensing elements measure the concentration of oil fume particles at each of these locations during a single operation. This allows for a precise determination of the amount of oil fume absorbed by the range hood during that operation, thus accurately reflecting the user's actual usage. If the range hood is run multiple times, the cumulative oil fume particle concentration can be obtained by summing the concentrations from each single operation. This cumulative concentration represents the user's actual usage over multiple runs. This allows for cleaning reminders to be provided based on the different usage patterns of different users, improving the accuracy of cleaning reminders and avoiding untimely or over-cleaning situations, achieving on-demand cleaning.

[0013] Preferably, the step of determining whether the oil filter needs cleaning includes:

[0014] Determine whether the cumulative concentration of oil fume particles at the oil filter is less than a first preset value; if not, indicate that the oil filter needs to be cleaned.

[0015] Preferably, if the user completes the cleaning after being prompted, the cumulative concentration of oil fume particles in the oil filter is set to zero, and the number of times the oil filter is cleaned is recorded.

[0016] Preferably, the step of determining whether the bottom condenser plate assembly needs cleaning includes:

[0017] If the number of times the oil filter is cleaned is greater than a first preset number, then the bottom condenser plate assembly is prompted to be cleaned.

[0018] Preferably, the step of determining whether the bottom condenser plate assembly needs cleaning includes:

[0019] If the number of times the range hood has been run in a high-fume environment exceeds a second preset number, then the bottom condenser plate assembly needs to be cleaned.

[0020] Preferably, before determining whether the number of times the range hood has operated in a high-fume environment exceeds a second preset number, the cleaning method for the range hood further includes:

[0021] Determine whether the ratio of the cumulative oil fume particle concentration of the oil mesh to the cumulative oil fume particle concentration of the bottom condenser plate assembly is greater than a second preset value. If so, record the number of times the range hood operates in a high oil fume environment.

[0022] Preferably, the bottom condenser plate assembly includes a first bottom condenser plate and a second bottom condenser plate, and both the first bottom condenser plate and the second bottom condenser plate are provided with the sensing element;

[0023] Before determining whether the ratio of the cumulative oil fume particle concentration of the oil mesh to the cumulative oil fume particle concentration of the bottom condenser plate assembly is greater than the second preset value, the magnitudes of the cumulative oil fume particle concentrations of the first bottom condenser plate and the second bottom condenser plate are compared first.

[0024] If the cumulative oil fume particle concentration of the first bottom condenser plate is greater than the cumulative oil fume particle concentration of the second bottom condenser plate, then determine whether the ratio of the cumulative oil fume particle concentration of the oil mesh to the cumulative oil fume particle concentration of the first bottom condenser plate is greater than the second preset value.

[0025] If the cumulative oil fume particle concentration of the second bottom condenser plate is greater than the cumulative oil fume particle concentration of the first bottom condenser plate, then it is determined whether the ratio of the cumulative oil fume particle concentration of the oil mesh to the cumulative oil fume particle concentration of the second bottom condenser plate is greater than the second preset value.

[0026] Preferably, if the user completes the cleaning after being prompted, the cumulative concentration of oil fume particles in the bottom condenser plate assembly is reduced to zero.

[0027] Preferably, the step of determining whether the impeller assembly needs cleaning includes:

[0028] Determine whether the difference in oil fume particle concentration between the impeller assembly and the exhaust hood assembly during a single operation is greater than a third preset value. If so, clean the impeller assembly.

[0029] Alternatively, determine whether the running time of the range hood exceeds a preset time; if so, clean the impeller assembly.

[0030] Preferably, the cleaning method for the range hood further includes the following steps:

[0031] The sensing element measures the concentration at regular intervals to obtain multiple instantaneous particle concentrations, and the cumulative concentration of the multiple instantaneous particle concentrations forms the concentration of oil fume particles in a single operation.

[0032] Determine whether the ratio of the single-run oil fume particle concentration to the maximum instantaneous particle concentration is less than a fourth preset value. If not, prompt the user that the amount of oil fume is high during cooking.

[0033] Preferably, the step of determining whether the air outlet assembly needs cleaning includes:

[0034] Determine whether the cumulative concentration of oil fume particles in the air outlet hood assembly is greater than a fifth preset value. If so, clean the air outlet system.

[0035] The positive and progressive effects of this invention are as follows:

[0036] This invention incorporates sensing elements at the oil filter, impeller assembly, exhaust hood assembly, and bottom condenser plate assembly. Each time the range hood is run, these sensing elements measure the concentration of oil fume particles at each of these locations during a single operation. This allows for a precise determination of the amount of oil fume absorbed by the range hood during that operation, providing accurate information about the user's actual usage. If the range hood is run multiple times, the cumulative oil fume particle concentration can be obtained by summing the concentrations from each single operation. This cumulative concentration represents the user's actual usage over multiple runs. This allows for cleaning prompts to be provided based on the individual user's usage patterns, improving the accuracy of cleaning prompts and preventing either delayed or over-cleaning, thus achieving on-demand cleaning. Attached Figure Description

[0037] Figure 1 This is a flowchart of a cleaning method for a range hood according to an embodiment of the present invention.

[0038] Figure 2 This is a cross-sectional structural diagram of a range hood according to an embodiment of the present invention.

[0039] Figure 3 This is a partial structural diagram of a range hood according to an embodiment of the present invention.

[0040] Explanation of reference numerals in the attached figures

[0041] 100 range hoods

[0042] Oil Network 1

[0043] Impeller assembly 2

[0044] Impeller body 21

[0045] Air hood assembly 3

[0046] Bottom condenser plate assembly 4

[0047] First bottom condenser plate 41

[0048] Second bottom condenser plate 42 Detailed Implementation

[0049] The present invention will be further illustrated by way of embodiments below, but the present invention is not limited to the scope of the embodiments.

[0050] Example 1

[0051] This embodiment discloses a cleaning method for a range hood. Before disclosing the specific cleaning method, the structure of the range hood 100 will be briefly introduced.

[0052] like Figures 2-3 As shown, the range hood 100 includes an oil filter 1, an impeller assembly 2, an exhaust hood assembly 3, and a bottom condenser plate assembly 4. All three assemblies—impeller assembly 2, exhaust hood assembly 3, and bottom condenser plate assembly 4—are equipped with sensing elements. Specifically, the bottom condenser plate assembly 4 includes a first bottom condenser plate 41 and a second bottom condenser plate 42, both of which are equipped with sensing elements. The impeller assembly 2 includes an impeller body 21 and a motor. The motor drives the impeller body 21 to rotate, and the sensing element can be located at the motor of the impeller assembly 2.

[0053] like Figure 1 As shown, the cleaning method for the range hood includes the following steps: running the range hood 100; each time the range hood 100 runs, it obtains the concentration of oil fume particles at the oil filter 1, impeller assembly 2, exhaust hood assembly 3, and bottom condenser plate assembly 4 through a sensing element, and obtains the cumulative concentration of oil fume particles at the oil filter 1, impeller assembly 2, exhaust hood assembly 3, and bottom condenser plate assembly 4 based on the concentration of oil fume particles in a single run; it determines whether the oil filter 1, exhaust hood assembly 3, and bottom condenser plate assembly 4 need cleaning based on the cumulative concentration of oil fume particles, and determines whether the impeller assembly 2 needs cleaning based on the concentration of oil fume particles in a single run.

[0054] By installing sensors at the oil filter 1, impeller assembly 2, exhaust hood assembly 3, and bottom condenser plate assembly 4, and measuring the concentration of oil fume particles at each of these locations during each operation of the range hood 100, the amount of oil fume absorbed by the range hood 100 during that operation can be accurately determined, thus providing a precise understanding of the user's actual usage. If the range hood 100 is operated multiple times, the cumulative oil fume particle concentration can be obtained by summing the concentrations from each operation. This cumulative concentration represents the user's actual usage over multiple runs. This allows for cleaning reminders to be provided based on the different usage patterns of different users, improving the accuracy of cleaning reminders and avoiding situations where cleaning reminders are not timely or over-cleaning occurs, achieving on-demand cleaning.

[0055] It should be noted that if the range hood is only run once, the cumulative concentration of oil fume particles still exists. At this time, the cumulative concentration of oil fume particles is equal to the concentration of oil fume particles from a single run.

[0056] The steps for determining whether the oil filter 1 needs cleaning include: determining whether the cumulative concentration of oil fume particles at the oil filter 1 is less than a first preset value; if not, indicating that the oil filter 1 needs cleaning. The first preset value is a set value representing the cleanliness level of the oil filter 1. If the obtained cumulative oil fume particle concentration is greater than or equal to the first preset value, it means that based on the user's actual usage, the oil filter 1 needs cleaning. Therefore, the user can be prompted to open the smoke baffle, disassemble the oil filter 1, and clean it. Further cleaning can be performed on the panel and the prism mesh.

[0057] If the user completes the cleaning after the prompt, the cumulative concentration of oil fume particles on oil filter 1 is reset to zero, and one cleaning cycle is recorded. A cumulative oil fume particle concentration of zero indicates that oil filter 1 is free of oil stains, meaning that oil filter 1 has been cleaned successfully. The next time the range hood 100 is run, the concentration of oil fume particles remaining on oil filter 1 will be re-accumulated, thus entering the next oil filter cleaning cycle. After each cleaning of oil filter 1, one cleaning cycle is recorded, thus obtaining the total number of cleaning cycles for oil filter 1. This facilitates the judgment of cleaning other components subsequently and also helps determine whether oil filter 1 needs to be replaced.

[0058] The steps for determining whether the bottom condenser plate assembly 4 needs cleaning include: determining whether the number of times the oil filter has been cleaned exceeds a first preset number; if so, indicating that the bottom condenser plate assembly 4 needs cleaning. Since the amount of oil fumes and the cumulative concentration of oil fume particles at the bottom condenser plate assembly 4 are relatively small, the number of times the oil filter 1 has been cleaned can be used as a criterion for determining whether the bottom condenser plate assembly 4 needs cleaning. If the oil filter 1 has been cleaned multiple times, indicating that the bottom condenser plate assembly 4 needs cleaning can be prompted. Since the cleaning determination of the oil filter 1 is based on the user's actual usage, further determining the cleaning of the bottom condenser plate assembly 4 through the oil filter 1 also reflects the user's actual usage, thus ensuring the accuracy of the cleaning determination for the bottom condenser plate assembly 4. The first preset number can be 10 times or any other number of times.

[0059] If the user completes the cleaning after the prompt, the accumulated oil fume particle concentration of the bottom condenser plate assembly 4 will be reset to zero, and the number of times the oil filter has been cleaned will also be reset to zero (or only the number of times the oil filter has been cleaned can be reset to zero). The next time the range hood is run, the number of times the oil filter has been cleaned will be re-accumulated, thus entering the next cleaning cycle.

[0060] In this embodiment, the step of determining whether the impeller assembly 2 needs cleaning includes: determining whether the difference in oil fume particle concentration between the impeller assembly 2 and the exhaust hood assembly 3 during a single operation is greater than a third preset value; if so, cleaning of the impeller assembly 2 is performed. The third preset value is a set value representing the cleanliness level of the impeller body 21. Using the oil fume particle concentration during a single operation as the criterion for determining whether the impeller body 21 needs cleaning allows for obtaining the actual oil fume contamination state of the impeller body 21, improving the accuracy of cleaning prompts; furthermore, prompting for cleaning when the oil fume particle concentration of the impeller assembly 2 exceeds the set value during a single operation helps ensure the normal operation of the power system. The impeller assembly 2 employs a self-cleaning method, requiring no disassembly or other additional devices. Specifically, when the impeller assembly 2 needs cleaning, the exhaust hood assembly 3 is closed, and air is introduced at the bottom condenser plate assembly 4. The impeller body 21 reverses to filter oil, and the oil with residual heat drips from the blade pressure surface to achieve cleaning. Bottom air intake ensures low operating noise during oil filtration and also enables negative pressure pulsation in the flue.

[0061] In other embodiments, it can be determined whether the running time of the range hood 100 exceeds a preset time. If so, the impeller assembly 2 is cleaned. The preset time can be 10 minutes or any other time.

[0062] The cleaning method for the range hood also includes the following steps: The sensing element measures the concentration of oil fumes every second to obtain multiple instantaneous particle concentrations; these multiple instantaneous particle concentrations are accumulated to form the concentration of oil fumes during a single operation; it is then determined whether the ratio of the single operation's oil fume particle concentration to the maximum instantaneous particle concentration is less than a fourth preset value. If not, the user is prompted that the amount of oil fumes during cooking is high. The fourth preset value is the product of the range hood's 100% operating time and a constant, which is a set healthy cooking parameter. If the ratio of the single operation's oil fume particle concentration to the maximum instantaneous particle concentration is greater than or equal to the fourth preset value, it indicates a longer high-particle-density operating time, at which point the user can be reminded to improve their cooking methods (e.g., use less oil). In other embodiments, measurements may be taken every 2 seconds or more.

[0063] The steps for determining whether the exhaust hood assembly 3 needs cleaning include: determining whether the cumulative oil fume particle concentration of the exhaust hood assembly 3 is greater than a fifth preset value; if so, cleaning of the exhaust system is performed. The fifth preset value is a set value representing the cleanliness level of the exhaust system. Using the cumulative oil fume particle concentration of the exhaust hood assembly 3 as a judgment standard allows for the determination of the actual oil fume contamination status of the exhaust system, improving the accuracy of cleaning prompts. The exhaust system employs a self-cleaning method, requiring no disassembly or other additional devices. Specifically, when the exhaust system needs cleaning, the fan is first rotated forward for 10 seconds to open the check valve, and then the fan is rotated backward for 30 seconds to allow the oil in the check valve and exhaust pipe to flow back. After cleaning, the cumulative oil fume particle concentration of the exhaust hood assembly 3 is returned to zero.

[0064] In this embodiment, cleaning the oil filter 1, the bottom condenser plate assembly 4, the power system (impeller assembly 2), and the air outlet system does not require additional equipment, does not affect the air volume, noise, or other performance of the range hood 100, and can ensure its long-lasting and efficient performance.

[0065] The cleaning method for the range hood in this embodiment performs cleaning judgments on the oil filter 1, the bottom condenser plate assembly 4, the power system, and the air outlet system, forming a cleaning system for cleaning reminders.

[0066] It should be noted that the order of cleaning judgments for the oil filter 1, bottom condenser plate assembly 4, power system, and air outlet system is not specifically limited. The order of cleaning judgments between components can be adjusted according to the judgment conditions and simple logic. In this embodiment, the order of cleaning judgments is as follows: first, the air outlet system is judged and prompted; then, cooking habits are judged and prompted; then, the oil filter 1 is judged and prompted; then, the bottom condenser plate assembly 4 is judged and prompted; and finally, the impeller assembly 2 (power system) is judged and prompted.

[0067] The measurements and all judgments made by the sensing elements involved in this embodiment are performed every time the range hood 100 is run.

[0068] Example 2

[0069] Example 2 discloses a cleaning method for a range hood. The cleaning method in Example 2 is basically the same as that in Example 1, except that the step of determining whether the bottom condenser plate assembly 4 needs cleaning includes: determining whether the number of times the range hood has run in a high-smoke environment exceeds a second preset number; if so, then indicating that the bottom condenser plate assembly 4 needs cleaning. The number of times the range hood has run in a high-smoke environment can also reflect the actual oil stain condition of the bottom condenser plate assembly 4, which is more accurate than judging based on usage time. The second preset number can be 20 times or any other number.

[0070] The number of times the range hood operates in a high-smoke environment can be obtained by measuring the cumulative oil fume particle concentration using a sensing element, thus providing a true and accurate count of operations in such an environment. Specifically, if the ratio of the cumulative oil fume particle concentration of the oil filter 1 to the cumulative oil fume particle concentration of the bottom condenser plate assembly 4 is greater than a second preset value, it indicates that the range hood 100 is operating in a high-smoke environment, and this count is recorded. This judgment is performed every time the range hood 100 operates; each time the ratio exceeds the second preset value, the count of operations in a high-smoke environment is recorded, thus obtaining the total number of operations in a high-smoke environment. If this total number of operations exceeds the second preset number, it indicates that the bottom condenser plate assembly 4 needs cleaning.

[0071] When the bottom condenser plate assembly 4 includes a first bottom condenser plate 41 and a second bottom condenser plate 42, and both the first bottom condenser plate 41 and the second bottom condenser plate 42 are equipped with sensing elements, before determining whether the ratio of the cumulative oil fume particle concentration of the oil mesh 1 to the cumulative oil fume particle concentration of the bottom condenser plate assembly 4 is greater than a second preset value, the cumulative oil fume particle concentrations of the first bottom condenser plate 41 and the second bottom condenser plate 42 are compared. If the cumulative oil fume particle concentration of the first bottom condenser plate 41 is greater than the cumulative oil fume particle concentration of the second bottom condenser plate 42, then it is determined whether the ratio of the cumulative oil fume particle concentration of the oil mesh 1 to the cumulative oil fume particle concentration of the first bottom condenser plate 41 is greater than the second preset value; if the cumulative oil fume particle concentration of the second bottom condenser plate 42 is greater than the cumulative oil fume particle concentration of the first bottom condenser plate 41, then it is determined whether the ratio of the cumulative oil fume particle concentration of the oil mesh 1 to the cumulative oil fume particle concentration of the second bottom condenser plate 42 is greater than the second preset value. Then, based on the determination results, the number of times the range hood operates in a high-oil-fume environment is recorded.

[0072] If the user completes the cleaning after the prompt, the cumulative concentration of oil fume particles on the bottom condenser plate assembly 4 will be reset to zero, and the number of times the range hood has run in a high-fume environment will also be reset to zero. The next time the range hood is run, the concentration of oil fume particles remaining on the bottom condenser plate assembly 4 and the number of times the range hood has run in a high-fume environment will be re-accumulated, thus entering the next cleaning cycle.

[0073] The second preset value can be 2, meaning that if the cumulative oil fume particle concentration at the oil mesh 1 is more than twice the cumulative oil fume particle concentration at the bottom condenser plate assembly 4, it indicates that the amount of oil fume produced during cooking is large. In other embodiments, the second preset value can also be other values.

[0074] The measurements and all judgments made by the sensing elements involved in this embodiment are performed every time the range hood 100 is run.

[0075] While specific embodiments of the present invention have been described above, those skilled in the art should understand that these are merely illustrative examples, and the scope of protection of the present invention is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, but all such changes and modifications fall within the scope of protection of the present invention.

Claims

1. A method for cleaning a range hood, characterized in that, The range hood includes an oil filter, an impeller assembly, an air outlet assembly, and a bottom condenser plate assembly. The oil filter, the impeller assembly, the air outlet assembly, and the bottom condenser plate assembly are all equipped with sensing elements. The cleaning method for the range hood includes the following steps: Operate the range hood; Each time the range hood is run, the single-run oil fume particle concentration at the oil screen, the impeller assembly, the air outlet assembly, and the bottom condenser plate assembly is obtained through the sensing element, and the cumulative oil fume particle concentration at least at the oil screen, the air outlet assembly, and the bottom condenser plate assembly is obtained through the single-run oil fume particle concentration; The cumulative oil fume particle concentration is used to determine whether the oil mesh, the air outlet hood assembly, and the bottom condenser plate assembly need cleaning, and the oil fume particle concentration during a single operation is used to determine whether the impeller assembly needs cleaning. The steps for determining whether the impeller assembly needs cleaning include: Determine whether the difference in oil fume particle concentration between the impeller assembly and the exhaust hood assembly during a single operation is greater than a third preset value. If so, clean the impeller assembly. Alternatively, determine whether the running time of the range hood exceeds a preset time; if so, clean the impeller assembly.

2. The cleaning method for a range hood as described in claim 1, characterized in that, The steps for determining whether the oil filter needs cleaning include: Determine whether the cumulative concentration of oil fume particles at the oil filter is less than a first preset value; if not, indicate that the oil filter needs to be cleaned.

3. The cleaning method for a range hood as described in claim 2, characterized in that, If the user completes the cleaning after being prompted, the cumulative concentration of oil fume particles in the oil filter will be reset to zero, and the number of times the oil filter has been cleaned will be recorded.

4. The cleaning method for a range hood as described in claim 3, characterized in that, The steps for determining whether the bottom condenser plate assembly needs cleaning include: If the number of times the oil filter is cleaned is greater than a first preset number, then the bottom condenser plate assembly is prompted to be cleaned.

5. The cleaning method for a range hood as described in claim 1, characterized in that, The steps for determining whether the bottom condenser plate assembly needs cleaning include: If the number of times the range hood has been run in a high-fume environment exceeds a second preset number, then the bottom condenser plate assembly needs to be cleaned.

6. The cleaning method for a range hood as described in claim 5, characterized in that, Before determining whether the number of times the range hood has been operated in a high-fume environment exceeds a second preset number, the cleaning method for the range hood further includes: Determine whether the ratio of the cumulative oil fume particle concentration of the oil mesh to the cumulative oil fume particle concentration of the bottom condenser plate assembly is greater than a second preset value. If so, record the number of times the range hood operates in a high oil fume environment.

7. The cleaning method for a range hood as described in claim 6, characterized in that, The bottom condenser plate assembly includes a first bottom condenser plate and a second bottom condenser plate, and both the first bottom condenser plate and the second bottom condenser plate are provided with the sensing element; Before determining whether the ratio of the cumulative oil fume particle concentration of the oil mesh to the cumulative oil fume particle concentration of the bottom condenser plate assembly is greater than the second preset value, the magnitudes of the cumulative oil fume particle concentrations of the first bottom condenser plate and the second bottom condenser plate are compared first. If the cumulative oil fume particle concentration of the first bottom condenser plate is greater than the cumulative oil fume particle concentration of the second bottom condenser plate, then determine whether the ratio of the cumulative oil fume particle concentration of the oil mesh to the cumulative oil fume particle concentration of the first bottom condenser plate is greater than the second preset value. If the cumulative oil fume particle concentration of the second bottom condenser plate is greater than the cumulative oil fume particle concentration of the first bottom condenser plate, then it is determined whether the ratio of the cumulative oil fume particle concentration of the oil mesh to the cumulative oil fume particle concentration of the second bottom condenser plate is greater than the second preset value.

8. The cleaning method for a range hood as described in claim 4 or 5, characterized in that, If the user completes the cleaning after being prompted, the cumulative concentration of oil fume particles in the bottom condenser plate assembly will be reduced to zero.

9. The cleaning method for a range hood as described in claim 1, characterized in that, The cleaning method for the range hood also includes the following steps: The sensing element measures the concentration at regular intervals to obtain multiple instantaneous particle concentrations, and the cumulative concentration of the multiple instantaneous particle concentrations forms the concentration of oil fume particles in a single operation. Determine whether the ratio of the single-run oil fume particle concentration to the maximum instantaneous particle concentration is less than a fourth preset value. If not, prompt the user that the amount of oil fume is high during cooking.

10. The cleaning method for a range hood as described in claim 1, characterized in that, The steps for determining whether the air outlet assembly needs cleaning include: Determine whether the cumulative concentration of oil fume particles in the air outlet hood assembly is greater than a fifth preset value. If so, clean the air outlet system.

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