A control method, device, range hood, and storage medium for a range hood.

Abstract

This invention discloses a control method, device, range hood, and storage medium for a range hood. The control method includes: real-time monitoring of oil fume filtration parameters upstream and downstream of the oil fume filtration module in the oil fume flow path; calculating the real-time filtration value of the oil fume filtration module based on the oil fume filtration parameters upstream and downstream of the oil fume filtration module in the oil fume flow path; adjusting the fan speed and the ventilation gap of the elastic filter in real-time based on the real-time filtration value and / or issuing a prompt. The above method can solve the problem of fixed filtration effect or deterioration of filtration effect over time, and can adapt to the current operating conditions of the range hood to achieve the optimal oil fume filtration effect of the oil fume filtration module, thereby improving the user experience.

Description

Technical Field

[0001] This invention relates to the field of kitchen appliance technology, and in particular to a control method, device, range hood, and storage medium for a range hood. Background Technology

[0002] Range hoods have become widely used and popular because they can effectively absorb and remove cooking fumes, and they are used very frequently.

[0003] After prolonged use of a range hood, grease and grease will accumulate on the fan blades, causing the fan speed to decrease and the airflow to be reduced at the same speed setting. Furthermore, current range hoods primarily use fixed-style flat grease filters at the front end, with filtration performance designed for maximum airflow and fixed ventilation gaps. However, grease and grease can accumulate on these filters, causing the ventilation gaps to narrow.

[0004] In summary, existing range hoods suffer from reduced airflow due to the adhesion of waste oil, which narrows the ventilation gaps in the fume filter. This prevents the airflow and ventilation gaps from being adjusted according to the actual fume filtration situation, resulting in poor fume filtration and an inability to meet actual fume emission requirements. Summary of the Invention

[0005] This invention provides a control method, device, range hood, and storage medium for a range hood, which adjusts the fan speed and ventilation gap in real time according to the actual filtration of oil fumes, adapting to the current operating conditions of the range hood and achieving the best oil fume filtration effect of the oil fume filtration module.

[0006] In a first aspect, embodiments of the present invention provide a control method for a range hood, the range hood including a casing, a fan, and a fume filter module, the fume filter module including an elastic filter with adjustable ventilation gap, and the fan having multiple fan speed settings; the control method includes:

[0007] Real-time monitoring of oil fume filtration parameters upstream and downstream of the oil fume filtration module in the oil fume flow path;

[0008] Based on the oil fume filtration index parameters downstream and upstream of the oil fume filtration module in the oil fume flow path, the real-time filtration value of the oil fume filtration module is calculated.

[0009] Based on real-time filtration values, adjust the fan speed and the ventilation gap of the flexible filter in real time, and / or issue a prompt.

[0010] Optionally, real-time monitoring of fume filtration parameters upstream and downstream of the fume filtration module in the fume flow path includes:

[0011] Real-time monitoring of oil fume filtration index parameters upstream and downstream of the oil fume filtration module in the oil fume flow path to obtain the first upstream real-time index parameter and the first downstream real-time index parameter;

[0012] Based on the oil fume filtration index parameters downstream and upstream of the oil fume filtration module in the oil fume flow path, the real-time filtration value of the oil fume filtration module is calculated, including:

[0013] The first real-time filter value is calculated based on the first downstream real-time indicator parameters and the first upstream real-time indicator parameters.

[0014] Based on real-time filtration values, adjust the fan speed and the ventilation gap of the flexible filter in real time, and / or issue prompts, including:

[0015] The fan speed is adjusted in real time according to the first type of preset filter value range in which the first real-time filter value is located; wherein, different fan speeds correspond to a preset filter value calibration value for a downstream indicator parameter and an upstream indicator parameter, and the first type of preset filter value range is set according to the preset filter value calibration value corresponding to the current fan speed.

[0016] After adjusting the fan speed in real time according to the first preset filtration value range where the first real-time filtration value is located, the system also monitors the oil fume filtration parameters upstream and downstream of the oil fume filtration module in the oil fume flow path in real time, including:

[0017] Real-time monitoring of oil fume filtration index parameters upstream and downstream of the oil fume filtration module in the oil fume flow path to obtain second upstream real-time index parameters and second downstream real-time index parameters;

[0018] Based on the oil fume filtration index parameters downstream and upstream of the oil fume filtration module in the oil fume flow path, the real-time filtration value of the oil fume filtration module is calculated, which also includes:

[0019] The second real-time filter value is calculated based on the second downstream real-time indicator parameters and the second upstream real-time indicator parameters.

[0020] Based on real-time filtration values, the system adjusts the fan speed and the ventilation gap of the flexible filter in real time, and / or issues alerts. It also includes:

[0021] Based on the second real-time filtration value within the second type of preset filtration value range, the ventilation gap of the elastic filter is adjusted in real time and / or a prompt is issued; wherein, the second type of preset filtration value range is set according to the filtration value calibration value.

[0022] Optionally, the first type of preset filter value range includes a first range and a second range, the second range does not overlap with the first range, and any value in the second range is less than any value in the first range;

[0023] Based on the first real-time filtration value falling within the first category of preset filtration value range, the fan speed is adjusted in real time, including:

[0024] When the first real-time filter value is in the first range, the fan speed remains unchanged;

[0025] When the first real-time filtration value is in the second range, adjust the fan speed to the next level.

[0026] Optionally, after calculating the second real-time filtration value based on the second downstream real-time indicator parameters and the second upstream real-time indicator parameters, and before adjusting the ventilation gap of the elastic filter in real time according to the second type of preset filtration value range in which the second real-time filtration value falls, and / or before issuing a prompt, the method further includes:

[0027] Confirm that the second real-time filter value is in the second range.

[0028] Optionally, a second real-time filter value is calculated based on the second downstream real-time indicator parameters and the second upstream real-time indicator parameters, including:

[0029] Calculate the absolute value of the difference between the second downstream real-time indicator parameter and the second upstream real-time indicator parameter to obtain the second real-time filter value;

[0030] The first interval is [a, +∞), and the second interval is (0, a); where a is the preset filtration value corresponding to the current fan speed, and a > 0;

[0031] When the first real-time filter value is in the first range, maintain the fan speed unchanged, including:

[0032] When the first real-time filter value is in the range of [a, +∞), the fan speed remains unchanged;

[0033] When the first real-time filtration value is in the second range, adjust the fan speed to the next level, including:

[0034] When the first real-time filter value is in the range of (0, a), adjust the fan speed to the next level fan speed.

[0035] Optionally, the second type of preset filter value range is set according to the preset filter value calibration value corresponding to the next level of fan speed of the current fan speed.

[0036] Optionally, a second real-time filter value is calculated based on the second downstream real-time indicator parameters and the second upstream real-time indicator parameters, including:

[0037] Calculate the absolute value of the difference between the second downstream real-time indicator parameter and the second upstream real-time indicator parameter to obtain the second real-time filter value;

[0038] The second type of preset filter value range includes the following ranges: (Fn+1 (a'), F n (a')] and (F1(a'), +∞); where a' is the preset filtration value calibration value corresponding to the next level of the current fan speed, a' > 0, n is a positive integer from 1 to N, N is a positive integer greater than 1, F n (a')>F n+1 (a')>0;

[0039] Based on the second real-time filtration value falling within the second preset filtration value range, adjust the ventilation gap of the flexible filter in real time and / or issue prompts, including:

[0040] When the second real-time filtration value is (F1(a'), +∞), adjust the ventilation gap of the elastic filter to the first ventilation gap;

[0041] The second real-time filter value is at (F) n+1 (a'), F n When within the range of (a')], adjust the ventilation gap of the elastic filter to the second ventilation gap;

[0042] The second real-time filter value is at (F) n+2 (a'), F n+1 When within the range of (a')], adjust the ventilation gap of the elastic filter to the third ventilation gap;

[0043] The second ventilation gap is larger than the first ventilation gap, and the third ventilation gap is larger than the second ventilation gap.

[0044] Optionally, each fan speed corresponds to a preset filter ventilation gap, and the preset filter ventilation gap for the next fan speed is larger than the preset filter ventilation gap for the previous fan speed.

[0045] The first ventilation gap is greater than or equal to the preset filter ventilation gap corresponding to the current fan speed.

[0046] Optionally, N = 2, F1(a') ​​= 4a', F2(a') = 2a', F3(a') = a';

[0047] When the second real-time filtration value is (F1(a'), +∞), adjust the ventilation gap of the elastic filter to the first ventilation gap, including:

[0048] When the second real-time filtration value is (4a', +∞), adjust the ventilation gap of the elastic filter to the first ventilation gap;

[0049] The second real-time filter value is at (F) n+1 (a'), F n When within the range of (a')], adjust the ventilation gap of the elastic filter to the second ventilation gap, including:

[0050] When the second real-time filtration value is in the range of (2a', 4a'), adjust the ventilation gap of the elastic filter to the second ventilation gap;

[0051] The second real-time filter value is at (F) n+2 (a'), F n+1 When within the range of (a')], adjust the ventilation gap of the elastic filter to the third ventilation gap, including:

[0052] When the second real-time filtration value is within the range of (a', 2a'), adjust the ventilation gap of the elastic filter to the third ventilation gap.

[0053] Optionally, the second type of preset filter value range also includes the following range: (0, F N+1 (a')];

[0054] Based on the second real-time filtration value falling within the second category of preset filtration value range, the system also includes adjusting the ventilation gap of the flexible filter in real time and / or issuing a prompt, and further includes:

[0055] The second real-time filter value is in (0, F) N+1 When (a')] is activated, a prompt to clean the filter and / or replace the filter will be issued.

[0056] Optionally, before real-time monitoring of the oil fume filtration parameters upstream and downstream of the oil fume filtration module in the oil fume flow path, the following steps are also included:

[0057] Confirm fan startup;

[0058] The oil fume filtration index parameters upstream and downstream of the oil fume filtration module in the oil fume flow path are detected to obtain the initial index parameters upstream and downstream.

[0059] The initial filter value is calculated based on the initial downstream and initial upstream indicator parameters.

[0060] Adjust the fan speed according to the third preset filtration value range where the initial filtration value is located; the third preset filtration value range is set according to the filtration value calibration value.

[0061] Optionally, an initial filter value is calculated based on the initial downstream and initial upstream indicator parameters, including:

[0062] Calculate the absolute value of the difference between the initial downstream indicator parameters and the initial upstream indicator parameters to obtain the initial filter value;

[0063] The third type of preset filter value range includes the following ranges: (a) i+1 a i ], a ia is the preset filtration calibration value corresponding to the i-th fan speed setting. i >0, where i is a positive integer greater than or equal to 1;

[0064] Adjust the fan speed according to the third preset filtration value range where the initial filtration value falls, including:

[0065] When the initial filter value is in (a) i+1 a i When the range is within the specified range, adjust the fan to the i-th fan speed setting.

[0066] Optionally, a filter ventilation gap is preset for each fan speed setting;

[0067] After adjusting the fan speed based on the third preset filter value range where the initial filter value falls, the following steps are also included:

[0068] Adjust the ventilation gap of the flexible filter to the preset ventilation gap corresponding to the current fan speed, based on the current fan speed.

[0069] Optionally, the parameters for oil fume filtration include oil fume concentration and wind speed.

[0070] Optionally, the resilient filter screen includes multiple springs arranged side by side;

[0071] Based on the second real-time filtration value falling within the second preset filtration value range, adjust the ventilation gap of the flexible filter in real time and / or issue prompts, including:

[0072] Based on the second real-time filter value's location within the second type of preset filter value range, the spring pitch is adjusted in real time and / or a prompt is issued.

[0073] Secondly, embodiments of the present invention also provide a control device for a range hood. The range hood includes a casing, a fan, and a fume filter module. The fume filter module includes an elastic filter screen with adjustable ventilation gaps. The fan has multiple fan speed settings, where the airflow of the lower fan speed setting is greater than the airflow of the higher fan speed setting. The control device includes:

[0074] The monitoring module is used to monitor the oil fume filtration index parameters upstream and downstream of the oil fume filtration module in the oil fume flow path in real time.

[0075] The calculation module is used to calculate the real-time filtration value of the fume filtration module based on the fume filtration index parameters downstream and upstream of the fume filtration module in the fume flow path.

[0076] The adjustment module is used to adjust the fan speed in real time based on the real-time filtration value, as well as adjust the ventilation gap of the flexible filter screen in real time and / or issue a prompt.

[0077] Thirdly, embodiments of the present invention also provide a range hood, comprising:

[0078] One or more processors;

[0079] Storage device for storing one or more programs;

[0080] When one or more programs are executed by one or more processors, the one or more processors implement the control method of the range hood as described in the first aspect.

[0081] Fourthly, embodiments of the present invention also provide a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the control method for a range hood as described in the first aspect.

[0082] This invention provides a control method, device, range hood, and storage medium for a range hood. First, it monitors the oil fume filtration parameters upstream and downstream of the oil fume filtration module in the oil fume flow path in real time. Second, based on these parameters, it calculates the real-time filtration value of the oil fume filtration module. Finally, based on the real-time filtration value, it adjusts the fan speed and the ventilation gap of the flexible filter in real time, and / or issues a prompt. This method solves the problem of fixed or deteriorating filtration effects of the filter module, failing to meet the practical application needs of various scenarios. It enables real-time monitoring and judgment of the current oil fume filtration effect of the filter module, and then adjusts the fan speed and the ventilation gap of the flexible filter based on the actual filtration situation to adapt to the current operating conditions of the range hood, achieving the optimal oil fume filtration effect and improving the user experience. Attached Figure Description

[0083] Figure 1 This is a flowchart illustrating a control method for a range hood provided in Embodiment 1 of the present invention;

[0084] Figure 2 This is a schematic diagram of the structure of a range hood provided in Embodiment 1 of the present invention;

[0085] Figure 3 This is an exploded view of the oil fume filtration module provided by the present invention;

[0086] Figure 4 yes Figure 3 A magnified view of a section at point A in the middle;

[0087] Figure 5 This is a flowchart illustrating a control method for a range hood provided in Embodiment 2 of the present invention.

[0088] Figure 6 This is a flowchart illustrating a control method for a range hood provided in Embodiment 3 of the present invention;

[0089] Figure 7 This is a flowchart illustrating a control method for a range hood provided in Embodiment 4 of the present invention;

[0090] Figure 8 This is a schematic diagram of a filter adjustment and control strategy for an electrostatic purification device provided in Embodiment 5 of the present invention;

[0091] Figure 9 This is a schematic diagram of the control device for a range hood provided in Embodiment Six of the present invention;

[0092] Figure 10 This is a schematic diagram of the structure of a range hood provided in Embodiment 7 of the present invention;

[0093] in:

[0094] 1-Outer shell, 2-Fume filter module, 21-Elastic filter screen, 211-Spring;

[0095] 100 - Monitoring module, 200 - Calculation module, 300 - Adjustment module;

[0096] 101 - Processor, 102 - Storage device, 103 - Input device, 104 - Output device. Detailed Implementation

[0097] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0098] Before discussing the exemplary embodiments in more detail, it should be noted that some exemplary embodiments are described as processes or methods depicted as flowcharts. Although the flowcharts describe the operations (or steps) as sequential processes, many of these operations can be performed in parallel, concurrently, or simultaneously. Furthermore, the order of the operations can be rearranged. The process can be terminated when its operation is completed, but may also have additional steps not included in the figures. The process can correspond to a method, function, procedure, subroutine, subroutine, etc. Moreover, embodiments and features in the embodiments of the present invention can be combined with each other without conflict.

[0099] The term "comprising" and its variations as used in this invention are open-ended, meaning "including but not limited to". The term "based on" means "at least partially based on". The term "one embodiment" means "at least one embodiment".

[0100] It should be noted that the concepts of "first" and "second" mentioned in this invention are only used to distinguish the corresponding contents and are not used to limit the order or interdependence.

[0101] It should be noted that the terms "a" and "a plurality of" used in this invention are illustrative rather than restrictive. Those skilled in the art should understand that, unless otherwise expressly indicated in the context, they should be understood as "one or more".

[0102] Example 1

[0103] Figure 1 This is a flowchart illustrating a control method for a range hood provided in Embodiment 1 of the present invention. This method is applicable to situations where a range hood purifies oil fumes. The method can be executed by a control device for the range hood, which can be implemented by software and / or hardware and is generally integrated into the range hood.

[0104] Figure 2 This is a structural schematic diagram of a range hood provided in Embodiment 1 of the present invention. Figure 3 This is an exploded view of the oil fume filtration module provided by the present invention. Figure 4 yes Figure 3 A magnified view of a section at point A in the middle, for reference. Figures 2-4 The range hood used in the control method provided in Embodiment 1 of this invention has a certain structural basis. Specifically, the range hood includes a shell 1, a fan, and an oil fume filter module 2. The oil fume filter module 2 includes an elastic filter screen 21 with adjustable ventilation gap. The fan has multiple fan speeds, and the air volume of the lower fan speed is greater than the air volume of the upper fan speed in two adjacent fan speeds. (See below for reference.) Figure 1-4 The control method for a range hood provided in Embodiment 1 of the present invention will be described below:

[0105] like Figure 1 As shown, the control method for a range hood provided in Embodiment 1 of the present invention includes the following steps:

[0106] S110: Real-time monitoring of oil fume filtration parameters upstream and downstream of the oil fume filtration module in the oil fume flow path.

[0107] In this invention, the range hood is responsible for extracting cooking fumes from the kitchen and venting them outdoors. The fume filtration module 2 is responsible for filtering the fumes to reduce the concentration of harmful substances in the emitted fumes, meeting relevant emission requirements. The filtration effect of the fume filtration module 2 is characterized by corresponding index parameters, such as fume concentration and wind speed. In this embodiment, the fume filtration index parameters may include fume concentration and wind speed. The actual filtration effect can be determined by the difference in fume concentration or wind speed upstream and downstream of the fume filtration module 2. Here, upstream and downstream of the fume filtration module 2 refer to the positions before and after the fumes enter the module 2, respectively. At these two positions, sensor devices such as online fume monitoring instruments can be installed to collect fume concentration and wind speed information.

[0108] S120. Calculate the real-time filtration value of the fume filtration module based on the fume filtration index parameters downstream and upstream of the fume filtration module in the fume flow path.

[0109] As mentioned earlier, the difference in the upstream and downstream parameters of the fume filtration module 2 can characterize the fume filtration effect of the module, providing a real-time filtration result. This real-time filtration value can be calculated as the absolute value of the difference between the downstream and upstream real-time parameters, or simply the difference between the upstream and downstream parameters. Taking fume concentration as an example, it can be understood that after filtration by the fume filtration module 2, the downstream fume concentration will be lower than the upstream concentration, and the larger the reduction, the better the filtration effect. Therefore, the real-time filtration value should generally be greater than 0, and the better the filtration effect, the larger the real-time filtration value. The same principle applies to using wind speed as a parameter, and will not be elaborated further here.

[0110] S130. Adjust the fan speed in real time based on the real-time filtration value, and adjust the ventilation gap of the flexible filter in real time and / or issue a prompt.

[0111] It's important to understand that airflow also affects filtration efficiency; that is, with the same ventilation gap, different airflow levels will result in different filtration effects. Adjusting the fan speed here is essentially adjusting the airflow. When filtration efficiency deteriorates, increasing the airflow can improve it. Simultaneously, the ventilation gap of the flexible filter is also a key factor affecting filtration efficiency. Adjusting the ventilation gap of the flexible filter in real-time here means that when filtration efficiency deteriorates, adjusting the ventilation gap of the flexible filter can improve filtration.

[0112] Of course, considering that the filtration effect may be poor in actual application scenarios, when the filtration effect cannot be improved by adjusting the fan speed and the ventilation gap of the elastic filter, it is not necessary to adjust the fan speed and the ventilation gap of the elastic filter; simply reminding the user is sufficient.

[0113] The above technical solution first monitors the oil fume filtration parameters upstream and downstream of the oil fume filtration module in the oil fume flow path in real time; secondly, it calculates the real-time filtration value of the oil fume filtration module based on these parameters; finally, it adjusts the fan speed and the ventilation gap of the flexible filter screen in real time based on the real-time filtration value and / or issues a prompt. This method solves the problem of fixed or deteriorating filtration effects of the filter module, failing to meet the practical application needs of various scenarios. It can monitor and judge the current oil fume filtration effect of the filter module in real time, and then adjust the fan speed and the ventilation gap of the flexible filter screen according to the actual filtration situation, adapting to the current operating conditions of the range hood to achieve the best oil fume filtration effect and improve the user experience.

[0114] It should be added that, as in step S130 above, the order of the two operations—adjusting the fan speed and adjusting the ventilation gap of the elastic filter—is not specifically limited in this embodiment. In actual implementation, those skilled in the art can design the process by first adjusting the fan speed based on the real-time filtration value, and then adjusting the ventilation gap of the elastic filter based on the real-time filtration value, or by first adjusting the ventilation gap of the elastic filter based on the real-time filtration value, and then adjusting the fan speed based on the real-time filtration value. In this regard, the following embodiments will all describe the process by first adjusting the fan speed based on the real-time filtration value, and then adjusting the ventilation gap of the elastic filter based on the real-time filtration value.

[0115] Example 2

[0116] Figure 5 This is a flowchart illustrating a control method for a range hood according to Embodiment 2 of the present invention. This embodiment is an optimization based on the above embodiment. In this embodiment, the oil fume filtration index parameters upstream and downstream of the oil fume filtration module 2 in the oil fume flow path are monitored in real time, specifically including:

[0117] Real-time monitoring of oil fume filtration index parameters upstream and downstream of oil fume filtration module 2 in the oil fume flow path, obtaining the first upstream real-time index parameter and the first downstream real-time index parameter;

[0118] Based on the oil fume filtration index parameters downstream and upstream of oil fume filtration module 2 in the oil fume flow path, the real-time filtration value of oil fume filtration module 2 is calculated, specifically including:

[0119] The first real-time filter value is calculated based on the first downstream real-time indicator parameters and the first upstream real-time indicator parameters.

[0120] Based on real-time filtration values, the fan speed is adjusted in real-time, as is the ventilation gap of the flexible filter 21, and / or a prompt is issued, specifically including:

[0121] The fan speed is adjusted in real time according to the first type of preset filter value range in which the first real-time filter value is located; wherein, different fan speeds correspond to a preset filter value calibration value for a downstream indicator parameter and an upstream indicator parameter, and the first type of preset filter value range is set according to the preset filter value calibration value corresponding to the current fan speed.

[0122] After adjusting the fan speed in real time according to the first preset filtration value range where the first real-time filtration value is located, real-time monitoring of the oil fume filtration index parameters upstream and downstream of the oil fume filtration module 2 in the oil fume flow path may also include:

[0123] Real-time monitoring of oil fume filtration index parameters upstream and downstream of oil fume filtration module 2 in the oil fume flow path, obtaining second upstream real-time index parameters and second downstream real-time index parameters;

[0124] Based on the oil fume filtration index parameters downstream and upstream of oil fume filtration module 2 in the oil fume flow path, the real-time filtration value of oil fume filtration module 2 is calculated, which may also include:

[0125] The second real-time filter value is calculated based on the second downstream real-time indicator parameters and the second upstream real-time indicator parameters.

[0126] Based on real-time filtration values, the system may adjust the fan speed and the ventilation gap of the flexible filter 21 in real time, and / or issue prompts. This may also include:

[0127] Based on the second real-time filtration value within the second type of preset filtration value range, the ventilation gap of the elastic filter 21 is adjusted in real time and / or a prompt is issued; wherein, the second type of preset filtration value range is set according to the filtration value calibration value.

[0128] like Figure 5 As shown in Embodiment 2 of the present invention, a control method for a range hood includes the following steps:

[0129] S210. Monitor the oil fume filtration index parameters upstream and downstream of the oil fume filtration module in the oil fume flow path in real time, and obtain the first upstream real-time index parameter and the first downstream real-time index parameter.

[0130] S220. Calculate the first real-time filter value based on the first downstream real-time indicator parameters and the first upstream real-time indicator parameters.

[0131] As mentioned earlier, the difference in the upstream and downstream parameters of the fume filtration module 2 can characterize the fume filtration effect of the module. Specifically, the fume filtration effect can be characterized by the absolute value of the difference between the downstream real-time parameter and the upstream real-time parameter, or by the difference between the upstream and downstream real-time parameter. Taking fume concentration as an example, it can be understood that after filtration by the fume filtration module 2, the fume concentration downstream will be lower than that upstream, and the larger the reduction, the better the filtration effect. Therefore, the first real-time filtration value should generally be a value greater than 0, and the larger the first real-time filtration value, the better the filtration effect. The same principle applies to using wind speed as an indicator parameter, and will not be elaborated further here.

[0132] S230. Adjust the fan speed in real time according to the first type of preset filter value range where the first real-time filter value is located; wherein, different fan speeds correspond to a preset filter value calibration value for a downstream indicator parameter and an upstream indicator parameter, and the first type of preset filter value range is set according to the preset filter value calibration value corresponding to the current fan speed.

[0133] First, each fan speed setting corresponds to a preset filtration value calibration for both downstream and upstream indicator parameters. This means that, based on experiments or simulations, a filtration value can be calibrated at different fan speeds to achieve optimal filtration. This filtration value serves as the calibration value, and the filtration effect of the current filtration module can be determined by comparing the real-time filtration value with this calibration value. Here, using this filtration value calibration value to set a first-type preset filtration value range, and determining the first real-time filtration value within this first-type preset filtration value range, is one way to compare the first real-time filtration value with the calibration value. This can characterize the current filtration effect to a certain extent. Furthermore, based on the current filtration effect, for example, if prolonged use of the range hood leads to the accumulation of grease on the fan, reducing the actual airflow and thus worsening the filtration effect, the fan speed can be adaptively adjusted to improve the filtration effect.

[0134] S240: Monitor the oil fume filtration index parameters upstream and downstream of the oil fume filtration module in the oil fume flow path in real time, and obtain the second upstream real-time index parameter and the second downstream real-time index parameter.

[0135] S250. Calculate the filter values ​​of the second downstream real-time indicator parameters and the second upstream real-time indicator parameters to obtain the second real-time filter value.

[0136] Steps S240 and S250 above are essentially processes for further real-time monitoring and calculation of the filtration effect after adjusting the fan speed. The monitoring method here is the same as that in steps S210 and S220, the only difference being that the real-time filtration value before adjusting the fan speed is the first real-time filtration value, used to adjust the fan speed, i.e., the air volume, and the real-time filtration value after adjusting the fan speed is the second real-time filtration value, used to adjust the ventilation gap of the subsequent elastic filter 21.

[0137] S260. Adjust the ventilation gap of the elastic filter and / or issue a prompt in real time according to the second type of preset filter value range in which the second real-time filter value is located; wherein, the second type of preset filter value range is set according to the filter value calibration value.

[0138] Similar to adjusting the fan speed based on the first preset filtration value range where the first real-time filtration value is located in step S230, determining the second preset filtration value range where the second real-time filtration value is located here is essentially a way of characterizing the current filtration effect. Therefore, based on the current filtration effect, such as the accumulation of oil on the elastic filter screen 21 due to prolonged use of the range hood, which reduces the actual ventilation gap and worsens the filtration effect, the ventilation gap of the elastic filter screen 21 can be adaptively adjusted to improve the filtration effect.

[0139] Furthermore, it would be worth noting that in this embodiment, the way the first type of preset filter value interval and the second type of preset filter value interval are set according to the filter value calibration value can be the same or different. For example, the first type of preset filter value interval can simply use the filter value calibration value as the interval endpoint value to form the preset filter value interval; the second type of preset filter value interval can refer to using the filter value calibration value as a reference quantity and setting corresponding calculation formulas to calculate the endpoint values ​​of each first type of preset filter value interval. For example, calculating the values ​​under different proportional coefficients of the filter value calibration value as the interval endpoint values ​​to form the second type of preset filter value interval.

[0140] In one specific embodiment, optionally, the second type of preset filter value range is set according to the preset filter value calibration value corresponding to the next level of fan speed of the current fan speed.

[0141] Here, the filter value calibration value for comparison with the second real-time filter value is defined as the preset filter value calibration value corresponding to the next level of fan speed. In fact, it is the filter value of the upstream and downstream index parameters calibrated when the filtration effect is better under the next level of fan speed as the benchmark quantity. The real-time filter value under the current fan speed is compared with the range set according to the filter value calibration value of the next level.

[0142] It's important to understand that airflow also affects filtration efficiency; that is, under the same ventilation gap, the filtration effect will vary depending on the fan speed. Therefore, the real-time filtration values ​​calibrated when the filtration effect is optimal will differ across fan speeds. Compared to low airflow, the difference (positive value) between upstream and downstream filtration efficiency calibrated when the filtration effect is optimal is smaller at high airflow, and the absolute value of the difference between downstream and upstream is also smaller. When comparing filtration value calibration intervals, it's necessary to consider not only whether the current filtration effect meets the preset filtration effect at the current fan speed, but also to compare it with the preset filtration effect at adjacent fan speeds to more accurately determine whether the current filtration effect better meets the actual needs. Therefore, in one embodiment of the present invention, the second type of preset filtration value range is defined according to the preset filtration value calibration value corresponding to the next level fan speed. It can be compared with the preset filtration effect under the next level fan speed, and can realize the comparison with the preset filtration effect under the adjacent fan speed, so as to more accurately judge the current oil fume filtration effect, and then reasonably adjust the ventilation gap of the elastic filter screen 21 to improve the filtration effect.

[0143] The above technical solution first monitors the oil fume filtration index parameters upstream and downstream of the oil fume filtration module in the oil fume flow path in real time to obtain the first upstream real-time index parameters and the first downstream real-time index parameters; secondly, it calculates the first real-time filtration value based on the first downstream real-time index parameters and the first upstream real-time index parameters; then, it adjusts the fan speed in real time according to the first type of preset filtration value range in which the first real-time filtration value is located; wherein, different fan speeds correspond to a preset filtration value calibration value for the downstream index parameter and the upstream index parameter, and the first type of preset filtration value range is set according to the preset filtration value calibration value corresponding to the current fan speed; then, it monitors the oil fume filtration index parameters upstream and downstream of the oil fume filtration module in the oil fume flow path in real time to obtain the second upstream real-time index parameters and the second downstream real-time index parameters; then, it calculates the second real-time filtration value based on the second downstream real-time index parameters and the second upstream real-time index parameters; finally, it adjusts the ventilation gap of the elastic filter and / or issues a prompt in real time according to the second type of preset filtration value range in which the second real-time filtration value is located; wherein, the second type of preset filtration value range is set according to the filtration value calibration value. Using the above method, the problem of fixed or deteriorating filtration effects of filter modules, which fail to meet the actual application needs of various scenarios, can be solved. The method can monitor and judge the current fume filtration effect of the filter module in real time, and then adjust the fan speed and ventilation gap of the flexible filter screen according to the actual filtration situation of the fume, so as to adapt to the current operating conditions of the range hood and achieve the best fume filtration effect of the filter module, thereby improving the user experience.

[0144] Continue to refer to Figure 4In the fume filtration module 2, the elastic filter screen 21 includes multiple springs 211 arranged side by side. Based on this fume filter screen structure, step S260 in the above control method may specifically include:

[0145] S261. Adjust the pitch of spring 211 and / or issue a prompt in real time according to the second type of preset filter value range in which the second real-time filter value is located.

[0146] Specifically, such as Figure 4 As shown, there are ventilation gaps between the coils of the springs 211 arranged side by side, and these ventilation gaps vary with the degree of tension of the springs 211. The axial distance between corresponding points of adjacent coils on the mean diameter is called the pitch. The size of the pitch represents the degree of tension of the springs 211, and thus the size of the ventilation gaps. By adjusting the pitch of the springs 211, the ventilation gaps of the elastic filter screen 21 can be adjusted.

[0147] Example 3

[0148] Figure 6 This is a flowchart illustrating a control method for a range hood according to Embodiment 3 of the present invention. Embodiment 3 is an optimization based on the above embodiments. In this embodiment, before real-time monitoring of the oil fume filtration parameters upstream and downstream of the oil fume filtration module 2 in the oil fume flow path, the following steps can be added:

[0149] Confirm fan startup;

[0150] The oil fume filtration index parameters upstream and downstream of oil fume filtration module 2 in the oil fume flow path are detected to obtain the initial index parameters upstream and downstream.

[0151] The initial filter value is calculated based on the initial downstream and initial upstream indicator parameters.

[0152] Adjust the fan speed according to the third preset filtration value range where the initial filtration value is located; the third preset filtration value range is set according to the filtration value calibration value.

[0153] Furthermore, in this third embodiment, a filter ventilation gap can be preset for different fan speeds of the range hood. Therefore, after adjusting the fan speed according to the third preset filter value range where the initial filter value is located, the following steps can be added:

[0154] Adjust the ventilation gap of the elastic filter 21 to the preset ventilation gap corresponding to the current fan speed, based on the current fan speed.

[0155] Optionally, the first type of preset filter value range includes a first range and a second range, wherein the second range does not overlap with the first range, and any value in the second range is less than any value in the first range. Based on this, the fan speed is adjusted in real time according to the first type of preset filter value range in which the first real-time filter value is located, which may specifically include the following steps:

[0156] When the first real-time filter value is in the first range, the fan speed remains unchanged;

[0157] When the first real-time filtration value is in the second range, adjust the fan speed to the next level.

[0158] Furthermore, after calculating the second real-time filtration value based on the second downstream real-time indicator parameters and the second upstream real-time indicator parameters, and before adjusting the ventilation gap of the elastic filter 21 in real-time and / or issuing a prompt based on the second type of preset filtration value range in which the second real-time filtration value falls, the following steps may be added:

[0159] Confirm that the second real-time filter value is in the second range.

[0160] For details not covered in this embodiment, please refer to Embodiments 1 and 2.

[0161] like Figure 6 As shown, the control method for a range hood provided in Embodiment 3 of the present invention includes the following steps:

[0162] S301. Confirm fan start-up.

[0163] This step essentially triggers the automatic control of the range hood. After confirming the fan's start, the filtration effect of the fume filter module 2 can be monitored and adjusted. It's also worth noting that this step can indicate the initial stage of fan operation, allowing for the setting of the initial state of the fume filter module 2.

[0164] S302. Detect the oil fume filtration index parameters upstream and downstream of the oil fume filtration module in the oil fume flow path, and obtain the initial index parameters upstream and downstream.

[0165] S303. Calculate the initial filter value based on the initial downstream and upstream index parameters.

[0166] As mentioned above, in step S301, the stage of confirming the start of the fan is actually the initial stage of the fan's operation. At this time, the process of detecting the oil fume filtration index parameters of the upstream and downstream of the oil fume filtration module 2 in the oil fume flow path and calculating its filtration value is intended to use the initial filtration value to judge the filtration effect of the oil fume filtration module 2 in the initial stage of operation.

[0167] S304. Adjust the fan speed according to the third preset filtration value range where the initial filtration value is located; wherein, the third preset filtration value range is set according to the filtration value calibration value.

[0168] This step involves judging the filtration effect of the fume filter module 2 during the initial operation of the range hood. As mentioned earlier, the filtration value calibration is a filtration value of upstream and downstream index parameters calibrated for different fan speeds under optimal filtration conditions, based on experiments or simulations. By comparing the initial filtration value with the filtration value calibration, the filtration effect of the filter module can be judged. Similarly, here, the third type of preset filtration value range is set using the filtration value calibration. Determining the third type of preset filtration value range in which the initial filtration value falls is a way to compare the initial filtration value with the calibration value. This can characterize the filtration effect during the initial operation to a certain extent, and then the fan speed can be adjusted based on the initial filtration effect to achieve the best initial filtration effect of the filter module.

[0169] S305. Adjust the ventilation gap of the elastic filter to the preset ventilation gap corresponding to the current fan speed, based on the current fan speed.

[0170] Considering that both the fan speed and the ventilation gap of the elastic filter 21 are important factors affecting the filtration effect, in the initial stage of operation, to achieve the best initial filtration effect, it is necessary not only to adjust the fan speed but also to change the ventilation gap of the elastic filter 21. Specifically, similar to the filtration value calibration, the corresponding filter ventilation gap can be calibrated for different fan speeds under an optimal filtration effect through experiments or simulations. Therefore, when adjusting the filter module to achieve the best initial filtration effect based on the initial filtration effect, it is also necessary to adjust the ventilation gap of the elastic filter 21 to the corresponding calibrated filter ventilation gap value according to the current fan speed.

[0171] S306. Monitor the oil fume filtration index parameters upstream and downstream of the oil fume filtration module in the oil fume flow path in real time, and obtain the first upstream real-time index parameter and the first downstream real-time index parameter.

[0172] S307. Calculate the first real-time filter value based on the first downstream real-time indicator parameters and the first upstream real-time indicator parameters.

[0173] S3081. When the first real-time filtration value is in the first range, maintain the fan speed unchanged.

[0174] S3082. When the first real-time filtration value is in the second range, adjust the fan speed to the next level fan speed.

[0175] Steps S3081 and S3082 described above are specific processes for determining the first real-time filtration value and adjusting the fan speed based on two intervals divided within the first type of preset filtration value interval. The first and second intervals can be understood as two non-overlapping intervals with different ranges. In each interval, the value in the second interval is less than the value in the first interval. The second interval is either right-open or left-closed, with the right endpoint of the second interval coinciding with the left endpoint of the first interval. When the first real-time filtration value falls within these two intervals, it indicates different levels of fume filtration. For example, with a positive first real-time filtration value, a smaller value indicates a poorer filtration effect. Therefore, by appropriately setting the first and second intervals, when the first real-time filtration value falls within the second interval, it indicates that the current fan speed's filtration effect is insufficient, requiring adjustment of the fan speed—specifically, adjusting to the next lower fan speed to increase airflow and improve the filtration effect from an airflow perspective. Conversely, when the first real-time filtration value is within the first range, it indicates that the filtration effect at the current fan speed is sufficient, thus eliminating the need to adjust the fan speed. Therefore, these two steps essentially achieve real-time adjustment of the fan speed based on the fume filtration effect.

[0176] S309. Real-time monitoring of oil fume filtration index parameters upstream and downstream of the oil fume filtration module in the oil fume flow path, to obtain the second upstream real-time index parameter and the second downstream real-time index parameter.

[0177] S310. Calculate the second real-time filter value based on the second downstream real-time indicator parameters and the second upstream real-time indicator parameters.

[0178] S311. Confirm that the second real-time filter value is in the second interval.

[0179] As mentioned earlier, when the first real-time filtration value is in the second range, it indicates that the filtration effect at the current fan speed is insufficient, and the fan speed needs to be adjusted. Step S311 further determines that the fume filtration effect is insufficient based on the fan speed adjustments made in S3081 and S3082 according to the fume filtration effect. It can be understood that the second real-time filtration value actually represents the fume filtration effect after fan speed adjustment. When the second real-time filtration value is in the second range, it indicates that the fume filtration effect is still poor after adjusting the fan speed. Therefore, other methods, such as changing the ventilation gap of the elastic filter, can be used to adjust the fume filtration effect.

[0180] S312. Adjust the ventilation gap of the elastic filter and / or issue a prompt in real time according to the second type of preset filter value range in which the second real-time filter value is located; wherein, the second type of preset filter value range is set according to the filter value calibration value.

[0181] The third embodiment of this invention provides a range hood control method that, before real-time monitoring of the oil fume filtration index parameters upstream and downstream of the oil fume filtration module in the oil fume flow path, adds the following steps: determining fan startup; detecting the oil fume filtration index parameters upstream and downstream of the oil fume filtration module in the oil fume flow path to obtain upstream initial index parameters and downstream initial index parameters; calculating an initial filtration value based on the downstream initial index parameters and upstream initial index parameters; adjusting the fan speed according to the third type of preset filtration value range where the initial filtration value is located; wherein, the third type of preset filtration value range is set according to the filtration value calibration value; adjusting the ventilation gap of the elastic filter to the preset filter ventilation gap corresponding to the current fan speed according to the current fan speed. Furthermore, it specifies that the fan speed is adjusted in real-time according to the first type of preset filtration value range where the first real-time filtration value is located. Using the above method, the initial filtration efficiency of the range hood can be adjusted to an optimal state before real-time monitoring and feedback adjustment of the fume filtration module. This ensures that the range hood remains in an optimal filtration state throughout its operation and reduces the amount and frequency of adjustments during real-time monitoring, thus guaranteeing stable operation. Furthermore, by obtaining the first real-time filtration value through real-time detection, the fume filtration effect can be judged, and the fan speed can be adjusted accordingly. By changing the fan speed to alter the airflow, the fume filtration effect can be improved from the perspective of airflow, making the fume filtration adjustment process more diversified and precise, and contributing to a more accurate and adaptable fume filtration effect to the current operating conditions.

[0182] Based on the technical solutions of the above embodiments, this invention provides several specific implementation methods.

[0183] As a specific implementation method of this embodiment, S303, the initial filter value is calculated based on the downstream initial index parameters and the upstream initial index parameters, which can be specifically as follows:

[0184] Calculate the absolute value of the difference between the initial downstream indicator parameters and the initial upstream indicator parameters to obtain the initial filter value.

[0185] The third type of preset filter value range includes the following ranges: (a) i+1 a i ], a i a is the preset filtration calibration value corresponding to the i-th fan speed setting. i >0, where i is a positive integer greater than or equal to 1. Based on this, step S304 above may specifically include:

[0186] S3041, When the initial filter value is in (a i+1 a i When the range is within the specified range, adjust the fan to the i-th fan speed setting.

[0187] Among them, the third type of preset filter value range includes (a) i+1 a i ], a i The preset filtration calibration value for the i-th fan speed level essentially sets the interval using the preset filtration calibration values ​​for each fan speed level as interval endpoints. When ai is the filtration calibration value for the i-th fan speed level, a i+1 This indicates the initial filtration value of the next level after level i, i.e., level i+1, under the fan speed setting. The filtration effect of the oil fume filtration module 2 can be determined to be between the filtration effects of the level i and level i+1 fan speed settings. Correspondingly, the fan speed can be adjusted to this level i fan speed setting, so that the range hood can achieve the best filtration effect state during the calibration process in the initial stage of operation. For example, taking a1=16, a2=4, a3=1 as an example, according to the principle that the smaller the filter value (positive value) of the downstream and upstream index parameters, the worse the filtration effect, it can be seen that when the initial filter value is in the range of (4, 16], it indicates that the oil fume filtration effect is better, and the fan speed can be adjusted to the first level and the air volume can be adjusted to a low level; while when the initial filter value is in the range of (1, 4], it indicates that the oil fume filtration effect is relatively poor, and the fan speed can be adjusted to the second level and the air volume can be adjusted to a high level.

[0188] Example 4

[0189] Figure 7 This is a flowchart illustrating a control method for a range hood according to Embodiment 4 of the present invention. This embodiment is an optimization based on the above embodiments. In this Embodiment 4, a second real-time filter value is calculated based on the second downstream real-time indicator parameters and the second upstream real-time indicator parameters. Specifically, it can be as follows:

[0190] Calculate the absolute value of the difference between the second downstream real-time indicator parameter and the second upstream real-time indicator parameter to obtain the second real-time filter value.

[0191] Based on this, the first type of preset filter value range can be set as [a, +∞) and the second range as (0, a); where a is the preset filter value calibration value corresponding to the current fan speed, and a > 0.

[0192] Based on this, when the first real-time filter value is in the first interval, maintaining the fan speed unchanged may include:

[0193] When the first real-time filter value is in the range of [a, +∞), the fan speed remains unchanged;

[0194] When the first real-time filter value is in the second range, adjusting the fan speed to the next level fan speed may include:

[0195] When the first real-time filter value is in the range of (0, a), adjust the fan speed to the next level fan speed.

[0196] Further, confirming that the second real-time filter value is within the second range may include:

[0197] Confirm that the second real-time filter value is within the range of (0, a).

[0198] Optionally, a second real-time filter value is calculated based on the second downstream real-time indicator parameters and the second upstream real-time indicator parameters. Specifically, it can be:

[0199] Calculate the absolute value of the difference between the second downstream real-time indicator parameter and the second upstream real-time indicator parameter to obtain the second real-time filter value.

[0200] The second type of preset filter value range may include the following ranges: (F n+1 (a'), F n (a')] and (F1(a'), +∞); where a' is the preset filtration value calibration value corresponding to the next level of the current fan speed, a' > 0, n is a positive integer from 1 to N, N is a positive integer greater than 1, F n (a')>F n+1 (a')>0.

[0201] Based on this, according to the second preset filtration value range in which the second real-time filtration value is located, the ventilation gap of the elastic filter 21 is adjusted in real time and / or a prompt is issued, which may specifically include the following steps:

[0202] When the second real-time filtration value is (F1(a'), +∞), adjust the ventilation gap of the elastic filter screen 21 to the first ventilation gap;

[0203] The second real-time filter value is at (F) n+1 (a'), F n When the range is (a')], adjust the ventilation gap of the elastic filter 21 to the second ventilation gap;

[0204] The second real-time filter value is at (F) n+2 (a'), F n+1 When the range is (a')], adjust the ventilation gap of the elastic filter 21 to the third ventilation gap;

[0205] The second ventilation gap is larger than the first ventilation gap, and the third ventilation gap is larger than the second ventilation gap.

[0206] Furthermore, the second type of preset filter value range also includes the following range: (0, F N+1 (a')]. Based on this, according to the second type of preset filtration value range in which the second real-time filtration value is located, the ventilation gap of the elastic filter 21 is adjusted in real time and / or a prompt is issued, which may also include the following steps:

[0207] The second real-time filter value is in (0, F) N+1 When (a')] is activated, a prompt to clean the filter and / or replace the filter will be issued.

[0208] For details not covered in this embodiment, please refer to Embodiments 1 to 3.

[0209] like Figure 7 As shown in Embodiment 4 of the present invention, a control method for a range hood includes the following steps:

[0210] S401. Confirm fan start-up.

[0211] S402. Detect the oil fume filtration index parameters upstream and downstream of the oil fume filtration module in the oil fume flow path, and obtain the initial index parameters upstream and downstream.

[0212] S403. Calculate the initial filter value based on the initial downstream and upstream index parameters.

[0213] S404. Adjust the fan speed according to the third-class preset filtration value range where the initial filtration value is located; wherein, the third-class preset filtration value range is set according to the filtration value calibration value.

[0214] S405. Adjust the ventilation gap of the flexible filter to the preset ventilation gap corresponding to the current fan speed, based on the current fan speed.

[0215] S406. Monitor the oil fume filtration index parameters upstream and downstream of the oil fume filtration module in the oil fume flow path in real time, and obtain the first upstream real-time index parameter and the first downstream real-time index parameter.

[0216] S407. Calculate the absolute value of the difference between the first downstream real-time indicator parameter and the first upstream real-time indicator parameter to obtain the first real-time filter value.

[0217] S4081. When the first real-time filter value is in the range of [a, +∞), keep the fan speed unchanged.

[0218] S4081. When the first real-time filter value is in the range of (0, a), adjust the fan speed to the next level fan speed.

[0219] Steps S4081 and S4082 above actually provide a specific method for setting the first type of preset filter value range, and also provide a specific method for adjusting the fan speed according to the range in which the first real-time filter value is located. Here, 'a' can represent the preset filter value calibration value corresponding to the first fan speed, and 'a' can be specifically 1. According to the logic that the larger the first real-time filter value (positive value) is, the better the filtration effect, it can be seen that when the first real-time filter value is greater than or equal to 1, it means that the filtration effect meets the current filtration effect of the first fan speed, so there is no need to adjust the fan speed. Conversely, when the first real-time filter value is less than 1, it means that the filtration cannot meet the filtration effect of the current first fan speed, so it is necessary to increase the air volume to improve the filtration effect, that is, to adjust the fan to the next speed. Thus, the purpose of adaptively adjusting the fan speed according to the first type of preset filter value range in which the first real-time filter value is located can be achieved, thereby improving the filtration effect.

[0220] S409. Real-time monitoring of oil fume filtration index parameters upstream and downstream of the oil fume filtration module in the oil fume flow path, to obtain the second upstream real-time index parameter and the second downstream real-time index parameter.

[0221] S410. Calculate the absolute value of the difference between the second downstream real-time indicator parameter and the second upstream real-time indicator parameter to obtain the second real-time filter value.

[0222] S411. Confirm that the second real-time filter value is in the range (0, a).

[0223] This step, before adjusting the ventilation gap of the flexible filter, determines that adjusting the fan speed in step S4082 to improve the filtration effect is insufficient. Essentially, this step is a prerequisite for adjusting the ventilation gap of the flexible filter. Specifically, after adjusting the fan speed, if the second real-time filtration value is the same as the first real-time filtration value and remains within the range of (a, 0), it indicates that the improvement in fume filtration effect after adjusting the fan speed is not significant. Therefore, a method different from fan speed adjustment, namely adjusting the ventilation gap of the flexible filter, is needed to further improve the fume filtration effect.

[0224] It should be added that if the second real-time filtration value is within the range of [a, +∞), it indicates that the oil fume filtration effect has been effectively improved after adjusting the fan speed, and the filtration requirements can be met. In this case, it is not necessary to adjust the ventilation gap of the elastic filter screen, and real-time monitoring can continue.

[0225] S4121. When the second real-time filtration value is (F1(a'), +∞), adjust the ventilation gap of the elastic filter to the first ventilation gap.

[0226] S4122, when the second real-time filter value is at (F) n+1(a'), F n When within the range of (a')], adjust the ventilation gap of the elastic filter to the second ventilation gap.

[0227] S4123, when the second real-time filter value is at (F) n+2 (a'), F n+1 When within the range of (a')], adjust the ventilation gap of the elastic filter to the third ventilation gap.

[0228] Steps S4121-S4123 above provide a specific method for setting the second type of preset filtration value range, and also provide a specific method for adjusting the ventilation gap of the elastic filter 21 according to the second type of preset filtration value range in which the second real-time filtration value is located. Wherein, F n (a'), F n+1 (a') and F n+2 (a') represents the preset filtration value calibration value corresponding to the next level of fan speed. a' is three function values ​​of the variable, and the three functions are different, and F n (a')>F n+1 (a')>F n+2 (a'). In other words, the endpoints of the second type of preset filtration value range used here are obtained by substituting the filtration value calibration value of the next-level fan speed into the preset calculation function. It can be understood that the calculation function here needs to be predetermined based on experiments or simulations, so as to set multiple ranges using multiple endpoint values. The current oil fume filtration effect is accurately judged by the second type of preset filtration value range in which the second real-time filtration value is located, and the ventilation gap of the elastic filter screen 21 is adjusted accordingly.

[0229] The interval (F1(a'), +∞) set in step S4121 is the maximum interval range set by the maximum interval endpoint value determined by the function. The real-time filter value within this interval range indicates that the current oil fume filtration effect is better.

[0230] Based on this, for (F) n+1 (a'), F n For the real-time filtration value within the range of (a'), its filtration effect is worse than when the filtration value is in the maximum range (F1(a'), +∞). Therefore, when adjusting the ventilation gap of the elastic filter 21, it is necessary to adjust the real-time filtration value within the range of (F1(a'), +∞). n+1 (a'), F n The ventilation gap adjustment of the elastic filter 21 is larger within the range of (a')], that is, the second ventilation gap is larger than the first ventilation gap. Similarly, for (F n+2 (a'), F n+1 For real-time filter values ​​within the range of (a')], its filtering effect is relative to filter values ​​within the range of (F). n+1(a'), F n The filtering effect is poor when (a')] is in the range of (F). It is necessary to adjust the real-time filter value to be within (F). n+2 (a'), F n+1 The ventilation gap adjustment of the elastic filter 21 within the range of (a')] is larger, that is, the third ventilation gap is larger than the second ventilation gap.

[0231] In this embodiment of the invention, a preset ventilation gap for the filter screen can be set for each different fan speed, and the preset ventilation gap for the next-level fan speed is greater than the preset ventilation gap for the previous-level fan speed. Therefore, optionally, the first ventilation gap is greater than or equal to the preset ventilation gap for the current fan speed.

[0232] At this point, as in step S4121, when the real-time filtration value is in the maximum range (F1(a'), +∞), indicating a good filtration effect, the adjusted first ventilation gap must not be less than the preset filter ventilation gap corresponding to the current fan speed. For example, the first ventilation gap can be set equal to the preset filter ventilation gap corresponding to the current fan speed. This means that, based on the real-time filtration value being in the maximum range, the filtration effect is satisfactory, and therefore, the ventilation gap can be maintained at the preset gap condition for the current speed. Of course, to ensure optimal filtration efficiency, the first ventilation gap can also be set greater than the preset filter ventilation gap corresponding to the current fan speed. This means that, based on the real-time filtration value being in the maximum range, the filtration effect is good, but the ventilation gap can still be further increased to the first ventilation gap based on the preset ventilation gap for the current speed, thereby further improving the filter effect to meet the user's oil fume filtration needs.

[0233] In one specific embodiment, N can be selected as 2, F1(a') ​​= 4a', F2(a') = 2a', and F3(a') = a'.

[0234] Where N=2 indicates that there are three preset interval endpoint calculation functions: F1(a'), F2(a'), and F3(a'). The specific calculation functions for these three interval endpoints are: F1(a') ​​= 4a', F2(a') = 2a', and F3(a') = a'.

[0235] Therefore, step S4121 above can be specifically described as follows:

[0236] S41210 When the second real-time filtration value is (4a', +∞), adjust the ventilation gap of the elastic filter to the first ventilation gap.

[0237] The above step S4122 can be specifically described as follows:

[0238] S41220 When the second real-time filtration value is in (2a', 4a'], adjust the ventilation gap of the elastic filter to the preset filter ventilation gap corresponding to the next level of the fan speed of the current fan speed.

[0239] The above step S4123 can be specifically as follows:

[0240] S41230 When the second real-time filtration value is at (a', 2a'], adjust the ventilation gap of the elastic filter to the preset filter ventilation gap corresponding to the next lower fan speed of the current fan speed.

[0241] For ease of understanding, a' can be set to 1 here. Based on the principle that the smaller the positive filter value (downstream and upstream parameter values), the worse the filtration effect, we can conclude that when the real-time filter value is in (4, +∞), the fume filtration effect is good, and the elastic filter 21 can be adjusted to the first ventilation gap; when the real-time filter value is in (2, 4), the fume filtration effect is poor, and the ventilation gap of the elastic filter 21 can be adjusted to the second ventilation gap; when the real-time filter value is in (1, 2), the fume filtration effect is too poor, and the ventilation gap of the elastic filter 21 can be adjusted to the third ventilation gap. In other words, when the real-time filter value is in the ranges of (4, +∞), (2, 4), and (1, 2), the ventilation gap of the adjustable elastic filter 21 increases sequentially.

[0242] Optionally, the first ventilation gap can be a first preset ventilation gap, the second ventilation gap can be a second preset ventilation gap, the third ventilation gap can be a third preset ventilation gap, the first preset ventilation gap is the preset filter ventilation gap corresponding to the current fan speed, the second preset ventilation gap is the preset filter ventilation gap corresponding to the m-th fan speed of the current fan speed, and the third preset ventilation gap is the preset filter ventilation gap corresponding to the m+1-th fan speed of the current fan speed; where m is an integer and m≥1.

[0243] For example, m=1 indicates that the second preset ventilation gap is the preset filter ventilation gap corresponding to the next level of the current fan speed, and the third preset ventilation gap is the preset filter ventilation gap corresponding to the next two levels of the current fan speed, that is, the next-to-next level of the fan speed.

[0244] Continuing with the example where a' is 1, when the real-time filtration value is in (4, +∞), it indicates that the fume filtration effect is good. The flexible filter 21 can be adjusted to the preset ventilation gap corresponding to the current fan speed, meaning no adjustment is needed based on the preset ventilation gap. When the real-time filtration value is in (2, 4), it indicates that the fume filtration effect is poor. The ventilation gap of the flexible filter 21 can be adjusted to the preset filter ventilation gap corresponding to the next lower fan speed, which slightly increases the filter ventilation gap and appropriately improves the fume filtration effect. When the real-time filtration value is in (1, 2), it indicates that the fume filtration effect is too poor. The ventilation gap of the flexible filter 21 can be adjusted to the preset filter ventilation gap corresponding to the next lower fan speed, significantly increasing the filter ventilation gap and significantly improving the fume filtration effect.

[0245] S4124, when the second real-time filter value is at (0, F) N+1 When (a')] is activated, a prompt to clean the filter and / or replace the filter will be issued.

[0246] Using the specific example above, it can be seen that when the second real-time filter value is (0, 1), it means that the current oil fume filtration effect is so poor that it can no longer meet the oil fume filtration requirements. At this time, the user can be prompted to clean or replace the filter.

[0247] This invention provides a control method for a range hood, specifically adjusting the fan speed in real time based on the first preset filtration value range where a first real-time filtration value falls; and adjusting the ventilation gap of the flexible filter and / or issuing prompts in real time based on the second preset filtration value range where a second real-time filtration value falls. Using this method, the current fume filtration effect can be accurately determined according to different ranges, and the fan speed and ventilation gap of the flexible filter can be adjusted accordingly based on the actual effect. Furthermore, it provides prompts for cleaning or replacement in special circumstances, ensuring the range hood operates under optimal filtration conditions. This not only guarantees optimal filtration results but also helps users maintain the range hood in a timely manner, extending its service life.

[0248] Example 5

[0249] Figure 8 This is a schematic diagram of a filter adjustment and control strategy for an electrostatic purification device provided in Embodiment 5 of the present invention. The following refers to... Figures 2-4 as well as Figure 8 The filter adjustment and control strategy of a specific electrostatic purifier provided in Embodiment 5 of the present invention is described below:

[0250] First, when the range hood is not in use, the concentration of oil fumes downstream will be lower than that upstream after the fumes are filtered by the range hood. In other words, there will be a decrease in oil fume concentration. For the convenience of logical judgment, the absolute value 'a' of the difference between the downstream oil fume concentration C2 and the upstream oil fume concentration C1 is used as the logical parameter instead of the decrease in oil fume concentration. Let the absolute value of the difference between the downstream oil fume concentration C2 and the upstream oil fume concentration C1 be a0, that is, the initial decrease in oil fume concentration a0 = |C2-C1|. a0, a1, a2, a3, etc. are positive values. The larger a is, the larger the difference in oil fume concentration between the upstream and downstream, and the better the oil fume filtration effect.

[0251] When the range hood is turned on, it initially has one fan speed setting, namely N1, N2, N3...Nx. This fan speed setting is either the default setting, the setting activated by the user, or the setting saved from the last use. Simultaneously, the elastic filter 21 in the range hood's fume filtration module 2 is in its initial state, meaning the pitch between adjacent spring coils is P0.

[0252] It is understandable that after a period of use, the performance of the range hood will decline due to the accumulation of grease. In the initial state of the range hood, the reduction in grease concentration can be detected and calculated as a = |C2-C1|.

[0253] When a∈(a2,a1] (let a1=4a2), the smoke machine automatically adjusts to the N1 setting, and the left and right motors drive the winding wheels to wind up and unwind the steel wire rope respectively. The pitch of the left and right spiral elastic condensing mesh is stretched to the preset pitch Pa corresponding to the N1 setting, and the porosity of the spiral elastic condensing mesh changes accordingly.

[0254] As the range hood continues to be used, the fan accumulates more and more grease, causing the speed to gradually decrease and the smoke extraction effect to deteriorate. To maintain the desired smoke extraction effect at the current setting, the range hood can be automatically adjusted to a higher setting. The specific logic is as follows: The upstream and downstream oil fume concentrations C1 and C2 of the filter module are re-detected, and the decrease in oil fume concentration b = |C2-C1| is calculated. Then, the range of b is determined. If b > a1, the range hood remains at setting N1; if b < a1, the range hood is adjusted to setting N2.

[0255] Furthermore, as the range hood continues to be used, oil stains will accumulate on the condenser mesh, i.e., the elastic filter mesh 21, causing the condenser mesh pitch to decrease in effect and the resistance to increase. This will lead to a decrease in the oil fume filtration effect and a smaller absolute value of the difference in oil fume concentration between the upstream and downstream. At this time, in order to maintain the filtration effect of the condenser mesh at the current setting, the condenser mesh spacing needs to be stretched until it reaches its limit, at which point the user is reminded to clean / replace it. The specific judgment logic is as follows: The upstream oil fume concentration C1 and the downstream oil fume concentration C2 of the filter module are detected again, and the oil fume concentration reduction value b is calculated, b = |C2-C1|. Then, the range of b is determined and the condenser mesh pitch is controlled (this process is also a real-time monitoring and control of the condenser mesh pitch based on the upstream oil fume concentration C1 and the downstream oil fume concentration C2):

[0256] If b > 4a2, the left and right motors drive the winding wheels to wind up and unwind the wire rope, and the pitch of the left and right spiral elastic condensing nets is stretched to P1 (P1 ≥ Pa);

[0257] If 2a2<b≤4a2, the left and right motors drive the winding wheels to wind up and unwind the wire rope, and the pitch of the left and right spiral elastic condensing nets is stretched to P2.

[0258] If a2<b≤2a2, the left and right motors drive the winding wheels to wind up and unwind the wire rope, and the pitch of the left and right spiral elastic condensing nets is stretched to P3;

[0259] If b≤a2, the user is reminded to clean / replace the condenser screen. Then, the reduction value b of the oil fume concentration is detected and calculated in real time and compared with the previous value. If not, the b range is judged repeatedly and the pitch is adjusted. If it is, the left and right motors do not operate, and the pitch of the left and right spiral elastic condenser screens remains unchanged.

[0260] When a∈(a3,a2] (let a2=4a3), the smoke machine automatically adjusts to the N2 setting, and the left and right motors drive the winding wheel to wind up and unwind the steel wire rope respectively. The pitch of the left and right spiral elastic condensing mesh is stretched to Pb, and the porosity of the spiral elastic condensing mesh changes accordingly.

[0261] Similarly, as the range hood continues to be used, the fan accumulates more and more grease, causing the speed to gradually decrease and the smoke extraction effect to deteriorate. To maintain the desired smoke extraction effect at the current setting, the range hood can be automatically adjusted to a higher setting. The specific logic is as follows: The upstream and downstream oil fume concentrations C1 and C2 of the filter module are re-detected, and the decrease in oil fume concentration d = |C2 - C1| is calculated. Then, the range of d is determined. If d > a2, the range hood remains at setting N2; if d < a2, the range hood is adjusted to setting N3.

[0262] The upstream and downstream oil fume concentrations C1 and C2 of the filter module are detected again, and the decrease in oil fume concentration d is calculated, where d = |C2 - C1|. Then, the range of d is determined and the condenser mesh pitch is controlled (this process is also a real-time monitoring and control of the condenser mesh pitch based on the upstream and downstream oil fume concentrations C1 and C2).

[0263] If d > 4a3, the left and right motors drive the winding wheels to wind up and unwind the wire rope, and the pitch of the left and right spiral elastic condensing net is stretched to P4 (P4 ≥ Pb);

[0264] If 2a3<d≤4a3, the left and right motors drive the winding wheels to wind up and unwind the wire rope, and the pitch of the left and right spiral elastic condenser mesh is stretched to P5.

[0265] If a3<d≤2a3, the left and right motors drive the winding wheels to wind up and unwind the wire rope, and the pitch of the left and right spiral elastic condenser mesh is stretched to P6.

[0266] If d≤a3, the user is reminded to clean / replace the condenser screen. Then, the reduction value of oil fume concentration d is detected and calculated in real time and compared with the previous value. If not, the range of d is judged in a loop and the pitch is adjusted. If it is, the left and right motors do not operate and the pitch of the left and right spiral elastic condenser screens remains unchanged.

[0267] When a∈(a4,a3] (let a3=4a4), the smoke machine automatically adjusts to the N3 setting, and the left and right motors drive the winding wheel to take in and release the steel wire rope respectively. The pitch of the left and right spiral elastic condensing mesh is stretched to Pc, and the porosity of the spiral elastic condensing mesh changes accordingly.

[0268] Similarly, as the range hood continues to be used, the fan accumulates more and more grease, causing the speed to gradually decrease and the smoke extraction effect to deteriorate. In order to maintain the expected smoke extraction effect at the current setting, the range hood can be automatically adjusted to a higher setting. The specific judgment logic is as follows: The upstream oil fume concentration C1 and downstream oil fume concentration C2 of the filter module are detected again, and the decrease in oil fume concentration e = |C2-C1| is calculated. Then, the range of e is determined. If e > a3, the range hood remains at setting N3; if e < a3, the range hood setting is adjusted to N4.

[0269] The upstream and downstream oil fume concentrations C1 and C2 of the filter module are detected again, and the decrease in oil fume concentration e is calculated, e = |C2 - C1|. Then, the range of e is determined and the condenser mesh pitch is controlled (this process is also a real-time monitoring and control of the condenser mesh pitch based on the upstream and downstream oil fume concentrations C1 and C2).

[0270] If e > 4a4, the left and right motors drive the winding wheels to wind up and unwind the wire rope, and the pitch of the left and right spiral elastic condensing nets is stretched to P7 (P7 ≥ Pc);

[0271] If 2a4<e≤4a4, the left and right motors drive the winding wheels to wind up and unwind the wire rope, and the pitch of the left and right spiral elastic condensing nets is stretched to P8.

[0272] If a4<e≤2a4, the left and right motors drive the winding wheels to wind up and unwind the wire rope, and the pitch of the left and right spiral elastic condenser nets is stretched to P9.

[0273] If e ≤ a4, then remind the user to clean / replace the condenser screen.

[0274] The process described above, which controls the condenser mesh pitch based on the upstream oil fume concentration C1 and the downstream oil fume concentration C2, is actually a real-time monitoring and feedback control process. It continuously detects and calculates the decrease in oil fume concentration, comparing it with the previous value. If not, it cyclically judges the interval and adjusts the pitch; if yes, the left and right motors do not operate, and the pitch of the left and right spiral elastic condenser mesh remains unchanged. The other settings follow the same logic and will not be elaborated further.

[0275] In this way, the range hood can monitor the concentration of oil fumes in a circulating manner (or detect the upstream and downstream wind speeds and calculate the wind speed reduction value to achieve the same effect), and the filter module can automatically adjust the condenser mesh pitch in real time.

[0276] It should be added that the pitches of the above-mentioned condenser meshes should meet the following conditions: P3 > P2 > P1 ≥ Pa; P6 > P5 > P4 ≥ Pb; P9 > P8 > P7 ≥ Pc. Furthermore, some pitches among P1-P9 can be equal, for example: P2 = P4, P3 = P5 = P7, P6 = P8; or, P3 = P4, P6 = P7.

[0277] Example 6

[0278] Figure 9 This is a schematic diagram of the structure of a control device for a range hood provided in Embodiment Six of the present invention. The device is applicable to the situation of purifying oil fumes in a range hood. The device can be implemented by software and / or hardware and is generally integrated into the range hood.

[0279] Continue to refer to Figures 2-4 The range hood includes a housing 1, a fan, and an oil fume filter module 2. The oil fume filter module 2 includes an elastic filter screen 21 with adjustable ventilation gap. The fan has multiple fan speeds, and the air volume of the lower fan speed is greater than the air volume of the upper fan speed in two adjacent fan speeds.

[0280] Based on this, such as Figure 9 As shown, the control device includes:

[0281] The monitoring module 100 is used to monitor the oil fume filtration index parameters upstream and downstream of the oil fume filtration module 2 in the oil fume flow path in real time.

[0282] The calculation module 200 is used to calculate the real-time filtration value of the oil fume filtration module 2 based on the oil fume filtration index parameters downstream and upstream of the oil fume filtration module 2 in the oil fume flow path.

[0283] The adjustment module 300 is used to adjust the fan speed in real time based on the real-time filtration value, and to adjust the ventilation gap of the elastic filter screen 21 in real time and / or issue a prompt.

[0284] In this embodiment, the device first monitors the oil fume filtration index parameters upstream and downstream of the oil fume filtration module in the oil fume flow path in real time through the monitoring module; secondly, the calculation module calculates the real-time filtration value of the oil fume filtration module based on the oil fume filtration index parameters upstream and downstream of the oil fume filtration module in the oil fume flow path; finally, the adjustment module adjusts the fan speed in real time based on the real-time filtration value, and adjusts the ventilation gap of the elastic filter screen in real time and / or issues a prompt.

[0285] This embodiment provides a control device for a range hood that can solve the problem of fixed or deteriorating filtration effects of the filter module, failing to meet the actual application needs of various scenarios. It can monitor and judge the current fume filtration effect of the filter module in real time, and then adjust the fan speed and ventilation gap of the flexible filter screen according to the actual filtration situation of the fume, adapting to the current operating conditions of the range hood to achieve the best fume filtration effect of the filter module and improve the user experience.

[0286] Optionally, the monitoring module 100 is specifically used to monitor the oil fume filtration index parameters upstream and downstream of the oil fume filtration module 2 in the oil fume flow path in real time, and obtain the first upstream real-time index parameters and the first downstream real-time index parameters.

[0287] The calculation module 200 is specifically used to calculate and obtain the first real-time filter value based on the first downstream real-time indicator parameters and the first upstream real-time indicator parameters.

[0288] The adjustment module 300 is specifically used to adjust the fan speed in real time according to the first type of preset filter value range where the first real-time filter value is located; wherein, different fan speeds correspond to preset filter value calibration values ​​for a downstream indicator parameter and an upstream indicator parameter, and the first type of preset filter value range is set according to the preset filter value calibration value corresponding to the current fan speed.

[0289] The monitoring module 100 is also used to monitor the oil fume filtration index parameters upstream and downstream of the oil fume filtration module 2 in the oil fume flow path in real time, and obtain the second upstream real-time index parameters and the second downstream real-time index parameters.

[0290] The calculation module 200 is also specifically used to calculate and obtain the second real-time filter value based on the second downstream real-time indicator parameters and the second upstream real-time indicator parameters;

[0291] The adjustment module 300 is further used to adjust the ventilation gap of the elastic filter 21 in real time and / or issue a prompt based on the second type of preset filtration value range in which the second real-time filtration value is located; wherein, the second type of preset filtration value range is set according to the filtration value calibration value.

[0292] Optionally, the first type of preset filter value range includes a first range and a second range, the second range does not overlap with the first range, and any value in the second range is greater than any value in the first range. Based on this, the adjustment module 300 can specifically be used for:

[0293] When the first real-time filter value is in the first range, the fan speed remains unchanged;

[0294] When the first real-time filtration value is in the second range, adjust the fan speed to the next level.

[0295] Furthermore,

[0296] After calculating the second real-time filtration value based on the second downstream real-time indicator parameters and the second upstream real-time indicator parameters, the adjustment module 300 is also used to confirm that the second real-time filtration value is in the second range before adjusting the ventilation gap of the elastic filter 21 in real time and / or issuing a prompt, based on the second type of preset filtration value range in which the second real-time filtration value is located.

[0297] Furthermore, the calculation module 200 is specifically used to calculate the absolute value of the difference between the second downstream real-time indicator parameter and the second upstream real-time indicator parameter to obtain the second real-time filter value.

[0298] The first interval is [a, +∞), and the second interval is (0, a); where a is the preset filtration value corresponding to the current fan speed, and a > 0.

[0299] Based on this, the adjustment module 300 can be used to: maintain the fan speed unchanged when the first real-time filter value is in the range of [a, +∞); and adjust the fan speed to the next level fan speed when the first real-time filter value is in the range of (0, a).

[0300] Optionally, the second type of preset filter value range is set according to the preset filter value calibration value corresponding to the next level of fan speed of the current fan speed.

[0301] Furthermore, the calculation module 200 is specifically used to calculate the absolute value of the difference between the second downstream real-time indicator parameter and the second upstream real-time indicator parameter to obtain the second real-time filter value.

[0302] The second type of preset filter value range includes the following ranges: (F n+1 (a'), F n(a')] and (F1(a'); where a' is the preset filtration value calibration value corresponding to the next level of the current fan speed, a'>0, n takes a positive integer from 1 to N, N is a positive integer greater than 1, F n (a')>F n+1 (a')>0.

[0303] Based on this, the adjustment module 300 can also be used for:

[0304] When the second real-time filtration value is (F1(a'), +∞), adjust the ventilation gap of the elastic filter screen 21 to the first ventilation gap;

[0305] The second real-time filter value is at (F) n+1 (a'), F n When the range is (a')], adjust the ventilation gap of the elastic filter 21 to the second ventilation gap;

[0306] The second real-time filter value is at (F) n+2 (a'), F n+1 When the range is (a')], adjust the ventilation gap of the elastic filter 21 to the third ventilation gap;

[0307] The second ventilation gap is larger than the first ventilation gap, and the third ventilation gap is larger than the second ventilation gap.

[0308] Optionally, each fan speed corresponds to a preset filter ventilation gap, and the preset filter ventilation gap for the next fan speed is larger than the preset filter ventilation gap for the previous fan speed.

[0309] The first ventilation gap is greater than or equal to the preset filter ventilation gap corresponding to the current fan speed.

[0310] In one specific embodiment, N = 2, F1(a') ​​= 4a', F2(a') = 2a', F3(a') = a'.

[0311] Based on this, the adjustment module 300 can be specifically used for:

[0312] When the second real-time filtration value is (4a', +∞), adjust the ventilation gap of the elastic filter screen 21 to the first ventilation gap;

[0313] When the second real-time filtration value is in the range of (2a', 4a'), adjust the ventilation gap of the elastic filter screen 21 to the second ventilation gap;

[0314] When the second real-time filtration value is within the range of (a', 2a'), adjust the ventilation gap of the elastic filter screen 21 to the third ventilation gap.

[0315] Optionally, the second type of preset filter value range also includes the following range: (0, F N+1 (a')].

[0316] Based on this, the adjustment module 300 can also be used when the second real-time filter value is between (0, F) N+1 When (a')] is activated, a prompt to clean the filter and / or replace the filter will be issued.

[0317] Based on the above technical solution, the control device may further include:

[0318] The start-up determination module is used to determine the start-up of the fan before the monitoring module 100 monitors the oil fume filtration index parameters upstream and downstream of the oil fume filtration module in the oil fume flow path in real time.

[0319] The monitoring module 100 is also used to detect the oil fume filtration index parameters upstream and downstream of the oil fume filtration module 2 in the oil fume flow path, and obtain the initial index parameters upstream and downstream.

[0320] The calculation module 200 is also used to calculate the initial filter value based on the initial downstream index parameters and the initial upstream index parameters;

[0321] The adjustment module 300 is also used to adjust the fan speed according to the third type of preset filtration value range in which the initial filtration value is located; wherein, the third type of preset filtration value range is set according to the filtration value calibration value.

[0322] Furthermore, the calculation module 200 is also specifically used to calculate the absolute value of the difference between the downstream initial index parameter and the upstream initial index parameter to obtain the initial filter value.

[0323] The third category of preset filter value ranges also includes the following ranges: (a) i+1 a i ], a i a is the preset filtration calibration value corresponding to the i-th fan speed setting. i >0, where i is a positive integer greater than or equal to 1.

[0324] Adjustment module 300 is specifically used when the initial filter value is at (a i+1 a i When the range is within the specified range, adjust the fan to the i-th fan speed setting.

[0325] Alternatively, a filter ventilation gap can be preset for each fan speed.

[0326] Based on this, the adjustment module 300 is also used to adjust the fan speed according to the second type of preset filter value range where the initial filter value is located, and then adjust the ventilation gap of the elastic filter screen 21 to the preset filter screen ventilation gap corresponding to the current fan speed according to the current fan speed.

[0327] Optionally, the parameters for oil fume filtration include oil fume concentration and wind speed.

[0328] Optionally, the elastic filter 21 includes a plurality of springs 211 arranged side by side;

[0329] The adjustment module 300 is specifically used to adjust the pitch of the spring 211 and / or issue a prompt in real time according to the second type of preset filter value range in which the second real-time filter value is located.

[0330] The control device for the range hood described above can execute the control method for the range hood provided in any embodiment of the present invention, and has the corresponding functional modules and beneficial effects of executing the method.

[0331] Example 7

[0332] Figure 10 This is a structural schematic diagram of a range hood provided in Embodiment Seven of the present invention. Figure 10 As shown, the range hood provided in Embodiment 7 of the present invention includes: one or more processors 101 and a storage device 102; the processors 101 in the range hood may be one or more. Figure 10 Taking a processor 101 as an example; storage device 102 is used to store one or more programs; the one or more programs are executed by the one or more processors 101, so that the one or more processors 101 implement the range hood control method as described in any one embodiment of the present invention.

[0333] The range hood may also include an input device 103 and an output device 104.

[0334] The processor 101, storage device 102, input device 103, and output device 104 in the range hood can be connected via a bus or other means. Figure 10 Taking the example of a connection between China and Israel via a bus.

[0335] The storage device 102 in the range hood serves as a computer-readable storage medium, capable of storing one or more programs. These programs can be software programs, computer-executable programs, and modules, such as the program instructions / modules corresponding to the range hood control methods provided in Embodiments 1, 2, or 3 of this invention (e.g., attached...). Figure 9The control device shown includes the following modules: a monitoring module 100, used to monitor the oil fume filtration index parameters upstream and downstream of the oil fume filtration module 2 in the oil fume flow path in real time; a calculation module 200, used to calculate the real-time filtration value of the oil fume filtration module 2 based on the oil fume filtration index parameters upstream and downstream of the oil fume filtration module 2 in the oil fume flow path; and an adjustment module 300, used to adjust the fan speed in real time based on the real-time filtration value, and to adjust the ventilation gap of the elastic filter screen 21 in real time and / or issue a prompt. The processor 101 executes various functional applications and data processing of the range hood by running the software programs, instructions, and modules stored in the storage device 102, thereby realizing the control method of the range hood in the above method embodiment.

[0336] Storage device 102 may include a program storage area and a data storage area. The program storage area may store the operating system and applications required for at least one function; the data storage area may store data created based on the use of the range hood, etc. Furthermore, storage device 102 may include high-speed random access memory and may also include non-volatile memory, such as at least one disk storage device, flash memory device, or other non-volatile solid-state storage device. In some instances, storage device 102 may further include memory remotely located relative to processor 101, and this remote memory may be connected to the device via a network. Examples of such networks include, but are not limited to, the Internet, intranets, local area networks, mobile communication networks, and combinations thereof.

[0337] The input device 103 can be used to receive input digital or character information, and to generate key signal inputs related to user settings and function control of the range hood. The output device 104 may include a display screen or other display device.

[0338] Furthermore, when one or more programs included in the aforementioned range hood are executed by one or more processors 101, the programs perform the following operations:

[0339] Real-time monitoring of oil fume filtration parameters upstream and downstream of oil fume filtration module 2 in the oil fume flow path;

[0340] Based on the oil fume filtration index parameters downstream and upstream of oil fume filtration module 2 in the oil fume flow path, the real-time filtration value of oil fume filtration module 2 is calculated.

[0341] Based on the real-time filtration value, adjust the fan speed in real time, adjust the ventilation gap of the elastic filter 21 in real time, and / or issue a prompt.

[0342] Example 8

[0343] Embodiment 8 of the present invention provides a computer-readable storage medium storing a computer program thereon. When executed by a processor, the program is used to perform a control method for a range hood, the method comprising:

[0344] Real-time monitoring of oil fume filtration parameters upstream and downstream of oil fume filtration module 2 in the oil fume flow path;

[0345] Based on the oil fume filtration index parameters downstream and upstream of oil fume filtration module 2 in the oil fume flow path, the real-time filtration value of oil fume filtration module 2 is calculated.

[0346] Based on the real-time filtration value, adjust the fan speed in real time, adjust the ventilation gap of the elastic filter 21 in real time, and / or issue a prompt.

[0347] Optionally, when the program is executed by the processor, it can also be used to execute the control method of the range hood provided in any embodiment of the present invention.

[0348] The computer storage medium of this invention can be any combination of one or more computer-readable media. A computer-readable medium can be a computer-readable signal medium or a computer-readable storage medium. A computer-readable storage medium can be, for example,—but not limited to—an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination thereof. More specific examples (a non-exhaustive list) of computer-readable storage media include: an electrical connection having one or more wires, a portable computer disk, a hard disk, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM), flash memory, optical fiber, a portable CD-ROM, an optical storage device, a magnetic storage device, or any suitable combination thereof. A computer-readable storage medium can be any tangible medium that contains or stores a program that can be used by or in conjunction with an instruction execution system, apparatus, or device.

[0349] Computer-readable signal media may include data signals propagated in baseband or as part of a carrier wave, carrying computer-readable program code. Such propagated data signals may take various forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination thereof. Computer-readable signal media may also be any computer-readable medium other than computer-readable storage media, which can send, propagate, or transmit programs for use by or in connection with an instruction execution system, apparatus, or device.

[0350] Program code contained on a computer-readable medium may be transmitted using any suitable medium, including but not limited to: wireless, wire, optical fiber, radio frequency (RF), etc., or any suitable combination thereof.

[0351] Computer program code for performing the operations of this invention can be written in one or more programming languages ​​or a combination thereof, including object-oriented programming languages ​​such as Java, Smalltalk, and C++, as well as conventional procedural programming languages ​​such as "C" or similar programming languages. The program code can be executed entirely on the user's computer, partially on the user's computer, as a standalone software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In cases involving remote computers, the remote computer can be connected to the user's computer via any type of network—including a local area network (LAN) or a wide area network (WAN)—or can be connected to an external computer (e.g., via the Internet using an Internet service provider).

[0352] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention, the scope of which is determined by the scope of the appended claims.

Claims

1. A control method for a range hood, characterized in that, The range hood includes a casing (1), a fan, and a fume filtration module (2). The fume filtration module (2) includes an elastic filter screen (21) with adjustable ventilation gaps. The fan has multiple fan speed settings. The control method includes: Real-time monitoring of oil fume filtration index parameters upstream and downstream of the oil fume filtration module (2) in the oil fume flow path; Based on the oil fume filtration index parameters downstream and upstream of the oil fume filtration module (2) in the oil fume flow path, the real-time filtration value of the oil fume filtration module (2) is calculated. Based on the real-time filtration value, adjust the fan speed in real time, adjust the ventilation gap of the elastic filter (21) in real time, and / or issue a prompt. Real-time monitoring of oil fume filtration parameters upstream and downstream of the oil fume filtration module (2) in the oil fume flow path, including: Real-time monitoring of the oil fume filtration index parameters upstream and downstream of the oil fume filtration module (2) in the oil fume flow path, to obtain the first upstream real-time index parameter and the first downstream real-time index parameter; Based on the oil fume filtration index parameters downstream and upstream of the oil fume filtration module (2) in the oil fume flow path, the real-time filtration value of the oil fume filtration module (2) is calculated, including: The first real-time filter value is calculated based on the first downstream real-time indicator parameters and the first upstream real-time indicator parameters. Based on the real-time filtration value, the fan speed is adjusted in real-time, and the ventilation gap of the elastic filter (21) is adjusted in real-time and / or a prompt is issued, including: The fan speed is adjusted in real time according to the first type of preset filter value range in which the first real-time filter value is located; wherein, different fan speeds correspond to a preset filter value calibration value for a downstream indicator parameter and an upstream indicator parameter, and the first type of preset filter value range is set according to the preset filter value calibration value corresponding to the current fan speed. After adjusting the fan speed in real time according to the first preset filtration value range where the first real-time filtration value is located, the system further monitors the oil fume filtration index parameters upstream and downstream of the oil fume filtration module (2) in the oil fume flow path in real time, including: Real-time monitoring of the oil fume filtration index parameters upstream and downstream of the oil fume filtration module (2) in the oil fume flow path, to obtain the second upstream real-time index parameter and the second downstream real-time index parameter; Based on the oil fume filtration index parameters downstream and upstream of the oil fume filtration module (2) in the oil fume flow path, the real-time filtration value of the oil fume filtration module (2) is calculated, and the method further includes: The second real-time filter value is calculated based on the second downstream real-time indicator parameters and the second upstream real-time indicator parameters; Based on the real-time filtration value, the fan speed is adjusted in real time, and the ventilation gap of the elastic filter (21) is adjusted in real time and / or a prompt is issued, further including: Based on the second type of preset filtration value range in which the second real-time filtration value is located, the ventilation gap of the elastic filter (21) is adjusted in real time and / or a prompt is issued; wherein, the second type of preset filtration value range is set according to the filtration value calibration value.

2. The control method according to claim 1, characterized in that, The first type of preset filter value range includes a first range and a second range, the second range does not overlap with the first range, and any value in the second range is less than any value in the first range; Based on the first preset filter value range in which the first real-time filter value falls, the fan speed is adjusted in real time, including: When the first real-time filter value is within the first range, the fan speed remains unchanged; When the first real-time filter value is in the second range, adjust the fan speed to the next level fan speed.

3. The control method according to claim 2, characterized in that, After calculating the second real-time filtration value based on the second downstream real-time indicator parameters and the second upstream real-time indicator parameters, and adjusting the ventilation gap of the elastic filter (21) in real time according to the second type of preset filtration value range in which the second real-time filtration value is located, and / or before issuing a prompt, the method further includes: Confirm that the second real-time filtered value is within the second range.

4. The control method according to claim 2, characterized in that, Based on the second downstream real-time indicator parameters and the second upstream real-time indicator parameters, the second real-time filter value is calculated, including: Calculate the absolute value of the difference between the second downstream real-time indicator parameter and the second upstream real-time indicator parameter to obtain the second real-time filter value; The first interval is [a, +∞), and the second interval is (0, a); where a is the preset filtration value calibration value corresponding to the current fan speed, and a > 0; When the first real-time filter value is within the first range, maintaining the fan speed unchanged includes: When the first real-time filter value is in the range of [a, +∞), the fan speed is kept unchanged; When the first real-time filter value is within the second range, adjusting the fan speed to the next level fan speed includes: When the first real-time filter value is in the range of (0, a), adjust the fan speed to the next level fan speed.

5. The control method according to claim 1, characterized in that, The second type of preset filter value range is set according to the preset filter value calibration value corresponding to the next level of the fan speed of the current fan speed.

6. The control method according to claim 5, characterized in that, Based on the second downstream real-time indicator parameters and the second upstream real-time indicator parameters, the second real-time filter value is calculated, including: Calculate the absolute value of the difference between the second downstream real-time indicator parameter and the second upstream real-time indicator parameter to obtain the second real-time filter value; The second type of preset filter value range includes the following ranges: (F n+1 (a'), F n (a')] and (F1(a'), +∞); where a' is the preset filtration value calibration value corresponding to the next level of the current fan speed, a' > 0, n is a positive integer from 1 to N, N is a positive integer greater than 1, F n (a')>F n+1 (a')>0; Based on the second preset filtration value range in which the second real-time filtration value falls, the ventilation gap of the elastic filter (21) is adjusted in real time and / or a prompt is issued, including: When the second real-time filtration value is at (F1(a'), +∞), adjust the ventilation gap of the elastic filter (21) to the first ventilation gap; When the second real-time filter value is at (F) n+1 (a'), F n When the range is (a')], adjust the ventilation gap of the elastic filter (21) to the second ventilation gap; When the second real-time filter value is at (F) n+2 (a'), F n+1 When the range is (a')], adjust the ventilation gap of the elastic filter (21) to the third ventilation gap; Wherein, the second ventilation gap is larger than the first ventilation gap, and the third ventilation gap is larger than the second ventilation gap.

7. The control method according to claim 6, characterized in that, Each fan speed setting corresponds to a preset filter ventilation gap, and the preset filter ventilation gap for the next fan speed setting is greater than the preset filter ventilation gap for the previous fan speed setting. The first ventilation gap is greater than or equal to the preset ventilation gap of the filter screen corresponding to the current fan speed.

8. The control method according to claim 6, characterized in that, N=2, F1(a')=4a', F2(a')=2a', F3(a')=a'; When the second real-time filtration value is at (F1(a'), +∞), the ventilation gap of the elastic filter (21) is adjusted to the first ventilation gap, including: When the second real-time filtration value is at (4a', +∞), adjust the ventilation gap of the elastic filter (21) to the first ventilation gap; When the second real-time filter value is at (F) n+1 (a'), F n When the range of (a') is reached, adjusting the ventilation gap of the elastic filter (21) to the second ventilation gap includes: When the second real-time filtration value is in the range of (2a', 4a'), adjust the ventilation gap of the elastic filter (21) to the second ventilation gap; When the second real-time filter value is at (F) n+2 (a'), F n+1 When the range of (a') is reached, the ventilation gap of the elastic filter (21) is adjusted to the third ventilation gap, including: When the second real-time filtration value is in the range of (a', 2a'), the ventilation gap of the elastic filter (21) is adjusted to the third ventilation gap.

9. The control method according to claim 6, characterized in that, The second type of preset filter value range also includes the following range: (0, F N+1 (a')]; Based on the second preset filtration value range in which the second real-time filtration value is located, the system further includes adjusting the ventilation gap of the elastic filter (21) in real time and / or issuing a prompt, and includes: When the second real-time filter value is in (0, F) N+1 When (a')] is activated, a prompt to clean the filter and / or replace the filter will be issued.

10. The control method according to claim 1, characterized in that, Before real-time monitoring of the oil fume filtration index parameters upstream and downstream of the oil fume filtration module (2) in the oil fume flow path, the following is also included: Confirm fan startup; The oil fume filtration index parameters upstream and downstream of the oil fume filtration module (2) in the oil fume flow path are detected to obtain the initial index parameters upstream and downstream. The initial filter value is calculated based on the downstream initial index parameters and the upstream initial index parameters; The fan speed is adjusted according to the third type of preset filtration value range in which the initial filtration value is located; wherein, the third type of preset filtration value range is set according to the filtration value calibration value.

11. The control method according to claim 10, characterized in that, Based on the downstream initial indicator parameters and the upstream initial indicator parameters, the initial filter value is calculated, including: Calculate the absolute value of the difference between the downstream initial indicator parameter and the upstream initial indicator parameter to obtain the initial filter value; The third type of preset filter value range includes the following ranges: (a) i+1 a i ], a i a is the preset filtration calibration value corresponding to the i-th fan speed setting. i >0, where i is a positive integer greater than or equal to 1; Adjusting the fan speed according to the third preset filter value range where the initial filter value falls includes: When the initial filter value is in (a) i+1 a i When the range is within the specified range, adjust the fan to the i-th fan speed setting.

12. The control method according to claim 10, characterized in that, Each of the aforementioned fan speed settings corresponds to a pre-set filter ventilation gap; After adjusting the fan speed based on the third type of preset filter value range where the initial filter value falls, the process further includes: Adjust the ventilation gap of the elastic filter (21) to the preset ventilation gap of the filter corresponding to the current fan speed, according to the current fan speed.

13. The control method according to claim 1, characterized in that, The parameters for oil fume filtration include oil fume concentration and wind speed.

14. The control method according to claim 1, characterized in that, The elastic filter (21) includes a plurality of springs (211) arranged side by side; Based on the second preset filtration value range in which the second real-time filtration value falls, the ventilation gap of the elastic filter (21) is adjusted in real time and / or a prompt is issued, including: Based on the second real-time filter value being located within the second type of preset filter value range, the pitch of the spring (211) is adjusted in real time and / or a prompt is issued.

15. A control device for a range hood, characterized in that, The range hood includes a casing (1), a fan, and a fume filtration module (2). The fume filtration module (2) includes an elastic filter screen (21) with adjustable ventilation gaps. The fan has multiple fan speeds, and the airflow of the next fan speed is greater than that of the previous fan speed in any two adjacent fan speeds. The control device includes: The monitoring module is used to monitor the oil fume filtration index parameters upstream and downstream of the oil fume filtration module (2) in the oil fume flow path in real time. The calculation module is used to calculate the real-time filtration value of the oil fume filtration module (2) based on the oil fume filtration index parameters downstream and upstream of the oil fume filtration module (2) in the oil fume flow path. The adjustment module is used to adjust the fan speed in real time according to the real-time filtration value, and to adjust the ventilation gap of the elastic filter screen (21) in real time and / or issue a prompt. The monitoring module is specifically used to monitor the oil fume filtration index parameters upstream and downstream of the oil fume filtration module (2) in the oil fume flow path in real time, and obtain the first upstream real-time index parameter and the first downstream real-time index parameter. The calculation module is specifically used to calculate and obtain the first real-time filter value based on the first downstream real-time indicator parameters and the first upstream real-time indicator parameters. The adjustment module is specifically used to adjust the fan speed in real time according to the first type of preset filter value range in which the first real-time filter value is located; wherein, different fan speeds correspond to preset filter value calibration values ​​for downstream index parameters and upstream index parameters, and the first type of preset filter value range is set according to the preset filter value calibration value corresponding to the current fan speed. The monitoring module is also specifically used to monitor the oil fume filtration index parameters upstream and downstream of the oil fume filtration module (2) in the oil fume flow path in real time, and obtain the second upstream real-time index parameter and the second downstream real-time index parameter. The calculation module is further configured to calculate a second real-time filter value based on the second downstream real-time indicator parameters and the second upstream real-time indicator parameters. The adjustment module is further configured to adjust the ventilation gap of the elastic filter (21) and / or issue a prompt in real time according to the second type of preset filter value range in which the second real-time filter value is located; wherein the second type of preset filter value range is set according to the filter value calibration value.

16. A range hood, characterized in that, include: One or more processors; Storage device for storing one or more programs; When the one or more programs are executed by the one or more processors, the one or more processors implement the control method for the range hood as described in any one of claims 1-14.

17. A computer-readable storage medium having a computer program stored thereon, characterized in that, When executed by the processor, the program implements the control method for the range hood as described in any one of claims 1-14.

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