Control method and system of range hood, range hood, medium

Abstract

The application discloses a control method and system of an extractor hood, the extractor hood and a medium, and the extractor hood comprises a filter arranged at an air inlet of the extractor hood. The method comprises the following steps: acquiring illumination information of the filter; wherein the illumination information represents an oil fume condition; matching an operation strategy according to the illumination information of the filter; and controlling the operation of the extractor hood based on the operation strategy. The application accurately identifies the change of the oil fume, realizes the composite application of the filter, improves the oil fume interception capability and the intelligent level of the extractor hood, and improves the accuracy of the operation control of the extractor hood.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of range hood control, in particular to a range hood control method and system, a range hood and a medium. BACKGROUND

[0002] The range hood is an essential electric appliance for people to absorb oil smoke when cooking. In recent years, products with smoke stove linkage or intelligent start-up to adjust air volume have become increasingly popular. On the one hand, part of the smoke stove linkage package products are often characteristic models of some manufacturers, and cannot identify the actual change of oil smoke, so the accuracy of the range hood operation control is low. On the other hand, many users gradually use disposable filter elements (filter paper) to protect the range hood, which filters and intercepts at the front end of the fan, and the actual operation of the user is not very convenient. SUMMARY

[0003] The present application aims to solve the technical problem of the prior art that the range hood cannot be accurately controlled to operate automatically, and provides a range hood control method and system, a range hood and a medium.

[0004] The present application solves the above technical problem by the following technical scheme:

[0005] In a first aspect, a range hood control method is provided, the range hood comprising a filter element arranged at an air inlet of the range hood, the method comprising:

[0006] obtaining illumination information of the filter element; wherein the illumination information represents an oil smoke condition;

[0007] matching an operation strategy according to the illumination information of the filter element;

[0008] controlling the range hood to operate based on the operation strategy.

[0009] Optionally, the range hood comprises a photoelectric sensor, and the matching of the operation strategy according to the illumination information of the filter element comprises:

[0010] obtaining at least two electrical signals output by the photoelectric sensor in sequence; wherein the electrical signals are obtained according to the illumination information;

[0011] matching an operation strategy according to the first electrical signal and the second electrical signal.

[0012] Optionally, the electrical signals comprise a first electrical signal and a second electrical signal, and the matching of the operation strategy according to the electrical signals comprises:

[0013] comparing the first electrical signal and the second electrical signal with a threshold value; wherein the threshold value comprises a first threshold value and a second threshold value, and the first threshold value is not greater than the second threshold value;

[0014] start or switch to a low gear when the first electrical signal and / or the second electrical signal is not less than the first threshold value and the first electrical signal and / or the second electrical signal is less than the second threshold value;

[0015] start or switch to a high gear when the first electrical signal or the second electrical signal is not less than the second threshold value.

[0016] Optionally, the threshold values further include a third threshold value and a fourth threshold value, and when the range hood is in a running state, the matching operation strategy according to the electrical signals further includes:

[0017] maintain or switch to a low gear when the first electrical signal and the second electrical signal are both not greater than the first threshold value and a difference between the first electrical signal and the second electrical signal is not less than a fourth threshold value;

[0018] maintain or switch to a high gear when the first electrical signal or the second electrical signal is not less than the second threshold value and the first electrical signal or the second electrical signal is less than the third threshold value.

[0019] Optionally, when the range hood is in a running state, the matching operation strategy according to the electrical signals further includes:

[0020] comparing the first electrical signal and the second electrical signal with the threshold values upon receiving a shutdown signal;

[0021] replacing a filter of the range hood and shutting down the range hood when the first electrical signal and the second electrical signal are not less than the second threshold value;

[0022] shutting down the range hood when the first electrical signal and the second electrical signal are less than the second threshold value.

[0023] Optionally, the method further includes:

[0024] determining whether the filter replacement condition is met according to the at least two electrical signals;

[0025] replacing the filter and / or prompting filter replacement information when the determination result is yes.

[0026] Optionally, the method further includes:

[0027] determining a running state of the range hood;

[0028] determining a filter replacement condition matched with the running state;

[0029] determining whether the at least two electrical signals meet the filter replacement condition matched with the running state.

[0030] In a second aspect, a control system of an extractor hood is provided, the extractor hood comprising a filter arranged at an air outlet of the extractor hood, the system comprising:

[0031] an acquisition module configured to acquire illumination information of the filter, wherein the illumination information represents an oil fume condition;

[0032] a matching module configured to match an operation strategy according to the illumination information of the filter;

[0033] a control module configured to control operation of the extractor hood based on the operation strategy.

[0034] In a third aspect, an extractor hood is provided, the extractor hood comprising a memory, a processor, and a control program of the extractor hood stored in the memory and configured to be executed on the processor, the control program of the extractor hood being configured to implement the steps of the control method according to the first aspect when executed by the processor.

[0035] In a fourth aspect, a computer storage medium is provided, the computer storage medium storing a control program of an extractor hood, the control program of the extractor hood being configured to implement the steps of the control method according to the first aspect when executed by a processor.

[0036] On the basis of common knowledge in the art, the above-mentioned preferred conditions can be combined arbitrarily to obtain various preferred examples of the present application.

[0037] The positive progress effect of the present application is that the operation of the extractor hood is controlled according to the illumination information of the filter, the change of oil fume is accurately identified, the composite application of the filter is realized, the interception ability of oil fume and the intelligent level of the extractor hood are improved, and the accuracy of operation control of the extractor hood is improved. BRIEF DESCRIPTION OF DRAWINGS

[0038] Figure 1 A flowchart of a control method of an extractor hood according to an embodiment of the present application is provided.

[0039] Figure 2 An illumination diagram of a filter of a control method of an extractor hood according to an embodiment of the present application when the filter does not contact water or oil is provided.

[0040] Figure 3 A state diagram of a filter of a control method of an extractor hood according to an embodiment of the present application when the filter does not contact water or oil is provided.

[0041] Figure 4 An illumination diagram of a filter of a control method of an extractor hood according to an embodiment of the present application when the filter contacts water or oil is provided.

[0042] Figure 5A state diagram of a filter contacting water or oil in a control method of a range hood according to an embodiment of the present application is provided;

[0043] Figure 6 A structure diagram of a range hood in a control method of a range hood according to an embodiment of the present application is provided;

[0044] Figure 7 A schematic diagram of a photoelectric sensor receiving on the same side and receiving in different directions in a control method of a range hood according to an embodiment of the present application is provided;

[0045] Figure 8 A control method flowchart when the range hood is in a standby state in a control method of a range hood according to an embodiment of the present application is provided;

[0046] Figure 9 A control method flowchart when the range hood is in a start state in a control method of a range hood according to an embodiment of the present application is provided;

[0047] Figure 10 A control method flowchart when the range hood is in a standby state in another control method of a range hood according to an embodiment of the present application is provided;

[0048] Figure 11 A control method flowchart when the range hood is in a start state in another control method of a range hood according to an embodiment of the present application is provided;

[0049] Figure 12 A structure diagram of a control system of a range hood according to an embodiment of the present application is provided. DETAILED DESCRIPTION

[0050] The present application will be further described below by way of examples, but the present application is not limited to the examples.

[0051] As shown in Figure 1 , a control method of a range hood according to an embodiment of the present application comprises the following steps:

[0052] S11, obtaining illumination information of a filter.

[0053] Among them, referring to Figure 6 , the filter is arranged at the air inlet of the range hood, and the material of the filter is set according to the actual situation, for example, paper, stainless steel.

[0054] The illumination information represents the oil fume condition, and the illumination information includes at least one of the illumination characteristics such as the light transmittance, reflectivity and refractive index of the filter.

[0055] When the filter is paper, the opacity of the paper is mainly due to the scattering of light when the light passes through the fiber-air and air-filler interfaces. The refractive index of water is 1.33, the refractive index of air is 1.0, the refractive index of fiber is 1.53, the refractive index of filler calcium carbonate is 1.56, the refractive index of talc is 1.57, the refractive index of titanium dioxide is 2.55, and the refractive index of edible oil is 1.47. The greater the difference in refractive index, the more obvious the scattering, and the weaker the light transmission. The smaller the difference in refractive index, the stronger the light transmission.

[0056] As shown in Figure 2 , when the filter is not used, that is, the filter does not contact or soak water and oil, the fiber 22 and the filler 23 are mainly air 21, and the arrow indicates the emission information of the light source. Most of the light is scattered, and the transmitted light is very small. The light transmission rate is weak, and the filter 31 is in a state of not contacting or water vapor after drying, as shown in Figure 3 . The transparency of the filter is high. As shown in Figure 4 , when water or oil 41 (edible oil droplets) accumulates on the filter, the water or oil 41 will soak and fill the pores between the fibers 22 of the filter. Compared with air 21, the refractive index of water and oil 41 is closer to the fiber and filler 23. The light scattering is weakened, the transmitted light is increased, the light transmission rate is strong, and the light transmission rate of the filter 31 after contacting the oil is increased, as shown in Figure 5 . The transparency of the filter is high. Compared with oil, the refractive index of water is more different from the fiber and filler, so the light transmission rate will decrease. It can be judged from the light information of the filter that it is in the state of stir-frying cooking or steaming cooking, and then the air volume or gear of the range hood is adjusted.

[0057] Moreover, the water vapor generated by steaming cooking evaporates after a period of time after the cooking stops and the machine is turned off, so that the filter basically returns to the original state. The accumulation of oil stains will affect the subsequent automatic start judgment. It can also be judged whether to replace the filter when the machine is turned off according to this characteristic. When receiving the turn-off signal, the light information of the filter is judged. If the light information meets the replacement condition of the filter, the filter is replaced and the machine is turned off, so that the range hood can be used next time.

[0058] S12, matching the running strategy according to the light information of the filter.

[0059] By using the change of the light information such as the refractive index of the filter after contacting or soaking the water vapor or oil stains in the cooking process, the running strategy of the range hood is matched, for example, the range hood is turned on or off, or the gear is adjusted. The filter can also be automatically identified and replaced, the composite application of the filter is realized, the ability of intercepting oil fume is improved, and the intelligent level of the range hood is improved.

[0060] In one embodiment, the range hood includes a photoelectric sensor that matches an operating strategy based on light information from the filter, including:

[0061] Acquire at least two electrical signals sequentially output by the photoelectric sensor, wherein the electrical signals are obtained based on illumination information; and match the operating strategy based on the electrical signals.

[0062] Understandably, the photoelectric sensor periodically collects illumination information from the filter and converts each collected illumination information into an electrical signal characterizing the illumination features. This electrical signal can be the two electrical signals output by the photoelectric sensor at the two closest points in time to the current moment. The acquisition period of the photoelectric sensor can be set according to actual conditions.

[0063] like Figure 6 As shown, the range hood includes a photoelectric sensor located at the air outlet of the range hood. The transmitter 63 and receiver 69 of the photoelectric sensor are installed on the side of the range hood. The fumes enter the fan frame from under the fume collection hood 65 of the range hood, and after being filtered by the filter element 31 of the drum, they enter the fan 61. The airflow 68 before filtration passes through the filter element and becomes the filtered airflow 611. Most of the fumes are filtered by the filter element 31 and adhere to and wet the filter element 31, ensuring the long-term cleanliness of the fan 61. The air pores between the overall materials of the filter element are replaced by water or oil, and the transmitted light 610 changes, changing the overall light transmittance. The drum includes a drum support 66, a collection drum (oil stain) 64, and a collection drum (clean filter element) 67.

[0064] Changes in refractive index also cause changes in the reflectivity and transmittance at the filter interface; after absorbing water or oil, the reflectivity decreases while the transmittance increases. For example... Figure 7 As shown, 71 is the emitting end of the light source, and the same-side receiver 72 of the photoelectric sensor is reflective. When the filter is soaked in water or oil 41, the transmitted light increases, and the value of the same-side receiver 72 decreases. On the other hand, the opposite-side receiver 73 of the photoelectric sensor is transmissive. When the filter is soaked in water or oil 41, the transmitted light increases, and the value of the opposite-side receiver 73 increases. That is, the reflectivity decreases after absorbing oil or water, while the transmittance increases.

[0065] At least two electrical signals output by the photoelectric sensor are acquired, wherein the time interval between the two electrical signals is a first time threshold. By acquiring the electrical signals at two time points, the illumination information of the filter at different times is obtained. The operating strategy of the range hood is matched according to the changes in the illumination information, thereby improving the ability to identify oil fumes and the control accuracy of the range hood.

[0066] In one embodiment, the electrical signal includes a first electrical signal and a second electrical signal, and the operating strategy based on the electrical signal matching includes:

[0067] comparing the first electric signal and the second electric signal with a threshold value; wherein the threshold value comprises a first threshold value and a second threshold value, the first threshold value is not greater than the second threshold value, when the first electric signal is not less than the first threshold value and the first electric signal is less than the second threshold value, the range hood is started or switched to a low gear, when the first electric signal or the second electric signal is not less than the second threshold value, the range hood is started or switched to a high gear, for example, when the first electric signal is M1, the second electric signal is M2, the first threshold value is S1, and the second threshold value is S2, the condition for starting or switching the range hood to the low gear is S1≤M1<S2.

[0068] In one embodiment, the electric signal comprises a first electric signal and a second electric signal, and the operation strategy matching according to the electric signal comprises:

[0069] comparing the first electric signal and the second electric signal with a threshold value; wherein the threshold value comprises a first threshold value and a second threshold value, the first threshold value is not greater than the second threshold value, when the first electric signal is not less than the first threshold value and the first electric signal is less than the second threshold value, the range hood is started or switched to a low gear, when the first electric signal or the second electric signal is not less than the second threshold value, the range hood is started or switched to a high gear, for example, when the first electric signal is M1, the second electric signal is M2, the first threshold value is S1, and the second threshold value is S2, the condition for starting or switching the range hood to the low gear is S1≤M2<S2.

[0070] In one embodiment, the electric signal comprises a first electric signal and a second electric signal, and the operation strategy matching according to the electric signal comprises:

[0071] comparing the first electric signal and the second electric signal with a threshold value; wherein the threshold value comprises a first threshold value and a second threshold value, the first threshold value is not greater than the second threshold value, when the first electric signal is not less than the first threshold value and the first electric signal is less than the second threshold value, the range hood is started or switched to a low gear, when the first electric signal or the second electric signal is not less than the second threshold value, the range hood is started or switched to a high gear, for example, when the first electric signal is M1, the second electric signal is M2, the first threshold value is S1, and the second threshold value is S2, the condition for starting or switching the range hood to the low gear is S1≤M1<S2 and S1≤M2<S2.

[0072] When the value of the electric signal is not less than the first threshold value, it indicates that the oil fume is small, it is judged that water vapor is immersed, and it is a cooking mode, the range hood is started or switched to a low gear; when the value of the electric signal is not less than the second threshold value, it indicates that the oil fume is large, it is judged that there is obvious oil fume, and it is a stir-frying cooking mode, the range hood is started or switched to a high gear.

[0073] The first threshold value and the second threshold value are set according to actual conditions.

[0074] In one embodiment, the threshold value further comprises a third threshold value and a fourth threshold value, and when the range hood is in the on state, the matching operation strategy according to the electrical signal further comprises:

[0075] When the first electrical signal and the second electrical signal are both not greater than the first threshold value, and the difference between the first electrical signal and the second electrical signal is not less than the fourth threshold value, the range hood is kept or switched to a low gear; when the first electrical signal or the second electrical signal is not less than the second threshold value, and the first electrical signal or the second electrical signal is less than the third threshold value, the range hood is kept or switched to a high gear.

[0076] When the electrical signal is not less than the second threshold value, it indicates that the oil fume is large, at this time, the third threshold value is increased for further judgment of whether the filter element is saturated, if saturated, the further filtering capacity will be lost, and the filter element needs to be automatically replaced during cooking use to continue to maintain the filtering capacity.

[0077] Wherein, the third threshold value and the fourth threshold value are set according to actual conditions, when the receiving end and the transmitting end of the photoelectric sensor are arranged on the opposite side of the filter element, if the first threshold value is S1, the second threshold value is S2, the third threshold value is S3, and the fourth threshold value is Sk, the relationship between the threshold values is S1≤S2≤S3, and Sk≥S1; when the receiving end and the transmitting end of the photoelectric sensor are arranged on the same side of the filter element, if the first threshold value is P1, the second threshold value is P2, and the third threshold value is P3, the relationship between the threshold values is P3≤P1≤P2.

[0078] In one embodiment, it further comprises: judging whether the filter element replacement condition is met according to the at least two electrical signals; and replacing the filter element when the judgment result is yes.

[0079] In one embodiment, it further comprises: judging whether the filter element replacement condition is met according to the at least two electrical signals, and prompting the filter element replacement information when the judgment result is yes.

[0080] In one embodiment, it further comprises: judging whether the filter element replacement condition is met according to the at least two electrical signals, and replacing the filter element and prompting the filter element replacement information when the judgment result is yes.

[0081] The existing range hood uses a disposable filter element to filter and intercept at the front end of the fan, and whether the filter element needs to be replaced also lacks automatic judgment and replacement. The embodiment of the application obtains the state of the filter element according to the light information of the filter element, i.e. the electrical signal, and then judges the replacement condition of the filter element according to the state of the filter element, thereby improving the accuracy of judging the replacement of the filter element, replacing the filter element or prompting the filter element replacement information, and maintaining the good filtering capacity of the range hood.

[0082] In one embodiment, the method further includes: determining the operating state of the range hood, determining filter replacement conditions that match the operating state, and determining whether at least two electrical signals meet the filter replacement conditions that match the operating state.

[0083] The operating status of a range hood includes, but is not limited to, on, standby, off, and running. The replacement conditions for the filter are matched according to different operating statuses of the range hood to improve the accuracy of filter replacement. For example, when the range hood is on, one of the replacement conditions for the filter is that both electrical signals are less than a second threshold. This ensures that the filter is not affected by oil stains when judging light information during the use of the range hood, thus ensuring the filtration capacity of the range hood.

[0084] In one embodiment, when the range hood is in the on state, the operation strategy based on the electrical signal matching further includes:

[0085] Upon receiving a shutdown signal, the first and second electrical signals are compared with a threshold. When the first and second electrical signals are not less than the second threshold, the range hood's filter is replaced and the range hood is turned off. When the first and second electrical signals are less than the second threshold, the range hood is turned off.

[0086] The filter that is about to be replaced while the machine is turned off needs to be replaced to ensure that the machine can be automatically detected and turned on again. The condition for replacing the filter is set to a second threshold, which is not greater than the third threshold. If the first and second electrical signals are not less than the second threshold, it means that there is a lot of oil smoke, which will affect the next start-up judgment. The filter needs to be replaced to ensure the filtration capacity of the range hood and make full use of the filter while maintaining the range hood's ability to automatically turn on and off.

[0087] S13. Control the operation of the range hood based on the operating strategy.

[0088] Based on at least two electrical signals acquired by photoelectric sensors, the illumination information of the filter element is determined, and the start-up, speed change, and filter element replacement status of the range hood are determined according to the changes in illumination information.

[0089] The following is combined Figure 8 and Figure 9 To further illustrate the control method of a range hood, let's take a specific example:

[0090] The sensor's receiver and transmitter are arranged on opposite sides of the filter element. When there is water vapor or oil, the refractive index difference decreases after water vapor is absorbed, resulting in stronger light transmission. Oil, on the other hand, has a refractive index closer to that of other fillers than water, resulting in stronger light transmission. After the water vapor evaporates and the filter element dries, the refractive index difference within the filter material increases, weakening the light transmission capability.

[0091] like Figure 8As shown, when the range hood is in standby state, if the start signal is not detected, the receiving and transmitting ends of the photoelectric sensor run at low frequency and low power consumption, at this time, the signals of the photoelectric sensor are acquired, the electrical signals M1 and M2 acquired at the first time length threshold, the storage threshold S1 and S2 are acquired, wherein M1 is the first electrical signal, M2 is the second electrical signal, Δt1 is the first time length threshold, S1 is the first threshold, S2 is the second threshold, and Sk is the fourth threshold.

[0092] M1, M2, S1, S2 are compared, if S2≤M1 or M2, it is judged that there is obvious oil fume, in the stir-frying cooking mode, the range hood is started to run at high gear, if S1≤M1 or M2<S2, it is judged that there is water vapor, in the stir-frying cooking mode, the range hood is started to run at low gear, if M1 and M2 are both <S1, and M2-M1<Sk, it is judged that there is water vapor or oil fume gradually accumulated on the filter, which is gradually infiltrated or filled, changing the light transmittance of the filter, if M2-M1 is not less than Sk, this round is ignored.

[0093] As shown in the formula (1), when the range hood is in standby state, if the start signal is not detected, the receiving and transmitting ends of the photoelectric sensor run at low frequency and low power consumption, at this time, the signals of the photoelectric sensor are acquired, the electrical signals M1 and M2 acquired at the first time length threshold, the storage threshold S1 and S2 are acquired, wherein M1 is the first electrical signal, M2 is the second electrical signal, Δt1 is the first time length threshold, S1 is the first threshold, S2 is the second threshold, and Sk is the fourth threshold. Figure 9 As shown, when the range hood is in standby state, if the start signal is not detected, the receiving and transmitting ends of the photoelectric sensor run at low frequency and low power consumption, at this time, the signals of the photoelectric sensor are acquired, the electrical signals M1 and M2 acquired at the first time length threshold, the storage threshold S1 and S2 are acquired, wherein M1 is the first electrical signal, M2 is the second electrical signal, Δt1 is the first time length threshold, S1 is the first threshold, S2 is the second threshold, and Sk is the fourth threshold.

[0094] M1, M2, S1, S2, S3 are compared, if S2≤M1 or M2, and S3≤M1 or M2, it is judged that the filter is saturated, the rotating drum is replaced, if S2≤M1 or M2, but S3 is not less than M1 or M2, it is judged that the oil fume is large, the range hood is switched or kept at high gear, if S1≤M1 or M2<S2, it is judged that there is water vapor, in the cooking mode, the range hood is switched or kept at low gear, if M1 and M2 are both less than S1, and M2-M1<Sk, the range hood is switched or kept at low gear. When the range hood receives the shutdown signal, the functions of the fan except the photoelectric sensor are closed, the signals of the sensor are acquired, the electrical signals M1 and M2 acquired at the first time length threshold, the second threshold S2 is acquired, if M2 and M1 are both <S2, the machine is turned off, the sensor is switched to low power consumption, if not, the filter is contaminated with oil fume, which will affect the next start-up, then the rotating drum is replaced.

[0095] As shown in the formula (1), when the range hood is in standby state, if the start signal is not detected, the receiving and transmitting ends of the photoelectric sensor run at low frequency and low power consumption, at this time, the signals of the photoelectric sensor are acquired, the electrical signals M1 and M2 acquired at the first time length threshold, the storage threshold S1 and S2 are acquired, wherein M1 is the first electrical signal, M2 is the second electrical signal, Δt1 is the first time length threshold, S1 is the first threshold, S2 is the second threshold, and Sk is the fourth threshold. Figure 10 and Figure 11The receiving end and the transmitting end of the sensor are arranged on the same side of the filter element. When there is water vapor and oil, the water vapor is absorbed, the difference in refractive index is reduced, the light transmission is stronger, and the oil has a refractive index closer to other fillings than water, so the light transmission is stronger. At this time, the value of the same side receiving is reduced. After the water vapor evaporates and the filter material is dried, the refractive index difference in the filter element increases, so the light transmission ability is weakened, and the value of the same side receiving is increased instead.

[0096] As shown in Figure 10 , when the range hood is in standby state, if the start signal is not detected, the receiving end and the transmitting end of the photoelectric sensor operate at low frequency and low power consumption. At this time, the signals of the photoelectric sensor are acquired, the electrical signals M1 and M2 are acquired at an interval of a first time length threshold, and the storage thresholds P1 and P2 are acquired, wherein M1 is a first electrical signal, M2 is a second electrical signal, Δt1 is a first time length threshold, P1 is a first threshold, P2 is a second threshold, and Pk is a fourth threshold.

[0097] M1, M2, P1, and P2 are compared. If M1 or M2≤P1, the reflection is obviously reduced, it is judged that there is obvious oil fume, and the range hood is in the mode of explosive frying cooking, the range hood is started to run at high gear. If P1≤M1 or M2<P2, it is judged that there is water vapor, and the range hood is in the mode of explosive frying cooking, the range hood is started to run at low gear. If M1 and M2 are both>P2, the reflection is high, and M2-M1>Pk, it is judged that water vapor or oil fume is gradually accumulated on the filter element, and is gradually infiltrated or filled, which changes the light transmission of the filter element. If M2-M1 is not less than Pk, this round is ignored.

[0098] As shown in Figure 11 , when the range hood is in the start state, if the shutdown signal is not received, the fan of the range hood operates according to the command gear, the photoelectric sensor normally operates, the detection is more rapid, the signals of the sensor are acquired, the electrical signals M1 and M2 are acquired at an interval of a first time length threshold, and the storage thresholds P1, P2, and P3 are acquired, wherein M1 is a first electrical signal, M2 is a second electrical signal, Δt1 is a first time length threshold, P1 is a first threshold, P2 is a second threshold, P3 is a third threshold, and Pk is a fourth threshold.

[0099] Compare M1, M2, P1, P2, and P3. If M1 or M2 ≤ P1 and M1 or M2 ≤ P3, the filter is saturated and the reflection value is very small. Rotate the drum and replace the filter. If M1 or M2 ≤ P1, but M1 or M2 is not ≤ P3, the fumes are heavy. Switch the range hood to a higher setting or keep it running at a higher speed. If P1 ≤ M1 or M2 ≤ P2, there is moisture. The range hood is in steaming / cooking mode. Switch the range hood to a lower setting or keep it running at a lower speed. If both M1 and M2 are greater than P1, the reflection value is high, and M2 - M1 > Pk. Switch the range hood to a lower setting or keep it running at a lower speed. When the range hood receives a shutdown signal, all functions except for the photoelectric sensor are turned off. The range hood acquires the sensor signals, acquires electrical signals M1 and M2 at intervals of a first time threshold, and acquires the first threshold P1. If both M2 and M1 are greater than P1, the range hood is turned off and the sensor switches to low-power operation. If not, the filter is contaminated with oil fumes, which will affect the next use. In this case, the drum is rotated and the filter is replaced.

[0100] By utilizing the changes in light information after the filter element comes into contact with or is immersed in water vapor or oil stains during the cooking process, the system can automatically determine whether to turn the machine on or off or adjust the speed. This allows the filter element to both filter oil stains and perform control and judgment functions, thus improving the intelligence of the range hood.

[0101] This invention also provides a control system for a range hood, such as... Figure 12 As shown, the system includes:

[0102] The acquisition module 121 is used to acquire the illumination information of the filter element; wherein the illumination information represents the state of the oil fume.

[0103] Matching module 122 is used to match the operating strategy based on the illumination information of the filter element;

[0104] Control module 123 is used to control the operation of the range hood based on the operating strategy.

[0105] In one embodiment, the matching module includes:

[0106] An acquisition unit is configured to acquire a first electrical signal and a second electrical signal sequentially output by the photoelectric sensor; wherein the first electrical signal and the second electrical signal are obtained based on the illumination information;

[0107] The matching unit is used to match the operating strategy according to the first electrical signal and the second electrical signal.

[0108] In one embodiment, the matching module further includes:

[0109] The first comparison unit is used to compare the first electrical signal, the second electrical signal, and a threshold; wherein the threshold includes a first threshold and a second threshold, and the first threshold is not greater than the second threshold;

[0110] The first switching unit is used to start or switch the range hood to a low setting when the first electrical signal is not less than the first threshold and / or the second electrical signal is less than the second threshold.

[0111] The second switching unit is used to start or switch the range hood to a high-level position when the first electrical signal or the second electrical signal is not less than the second threshold.

[0112] In one embodiment, the threshold further includes a third threshold and a fourth threshold, and when the range hood is in the on state, the matching module further includes:

[0113] The third switching unit is used to maintain or switch the range hood to a low setting when both the first electrical signal and the second electrical signal are not greater than the first threshold and the difference between the first electrical signal and the second electrical signal is not less than a fourth threshold.

[0114] The fourth switching unit is used to maintain or switch the range hood to a high level when the first electrical signal or the second electrical signal is not less than the second threshold and the first electrical signal or the second electrical signal is less than the third threshold.

[0115] In one embodiment, when the range hood is in the on state, the matching module further includes:

[0116] The second comparison unit is used to receive a power-off signal and compare the first electrical signal, the second electrical signal, and the threshold.

[0117] The replacement unit is used to replace the filter of the range hood and turn off the range hood when the first electrical signal and the second electrical signal are not less than the second threshold.

[0118] The shutdown unit is used to turn off the range hood when the first electrical signal and the second electrical signal are less than the second threshold.

[0119] For the system embodiments, since they basically correspond to the method embodiments, the relevant parts can be referred to in the description of the method embodiments. The system embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of the present invention according to actual needs. Those skilled in the art can understand and implement this without creative effort.

[0120] This invention also provides a range hood, which includes a memory, a processor, and a control program for the range hood stored in the memory and executed on the processor. When the control program is executed by the processor, it implements the steps of the control method provided in any of the above embodiments.

[0121] This invention also provides a computer storage medium storing a control program for a range hood. When the control program for the range hood is executed by a processor, it implements the steps of the control method provided in any of the above embodiments.

[0122] While specific embodiments of the present invention have been described above, those skilled in the art should understand that these are merely illustrative examples, and the scope of protection of the present invention is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, but all such changes and modifications fall within the scope of protection of the present invention.

Claims

1. A control method for a range hood, characterized in that, The range hood includes a filter element disposed at the air vent of the range hood, and the method includes: Acquire the illumination information of the filter element; wherein the illumination information characterizes the state of the oil fume; The operating strategy is matched based on the illumination information of the filter element; The range hood is controlled to operate based on the aforementioned operating strategy; The range hood includes a photoelectric sensor, and the step of matching the operating strategy based on the light information of the filter element includes: Acquire at least two electrical signals sequentially output by the photoelectric sensor; wherein the electrical signals are obtained based on the illumination information; According to the electrical signal matching operation strategy; The electrical signal includes a first electrical signal and a second electrical signal, and the step of matching the operation strategy according to the electrical signal includes: The first electrical signal and the second electrical signal are compared with a threshold; wherein the threshold includes a first threshold and a second threshold, and the first threshold is not greater than the second threshold; When the first electrical signal and the second electrical signal are not less than the first threshold and the first electrical signal and the second electrical signal are less than the second threshold, the range hood is started or switched to a low setting. When the first electrical signal or the second electrical signal is not less than the second threshold, the range hood will be started or switched to a high setting; The threshold also includes a third threshold and a fourth threshold. When the range hood is in the on state, the step of matching the operation strategy according to the electrical signal further includes: When both the first electrical signal and the second electrical signal are not greater than the first threshold, and the difference between the first electrical signal and the second electrical signal is not less than the fourth threshold, the range hood maintains or switches to a low setting. When the first electrical signal or the second electrical signal is not less than the second threshold, and the first electrical signal or the second electrical signal is less than the third threshold, the range hood maintains or switches to a high setting.

2. The control method as described in claim 1, characterized in that, When the range hood is in the on state, the step of matching the operation strategy according to the electrical signal further includes: Upon receiving a power-off signal, the first electrical signal, the second electrical signal, and the threshold are compared. When the first electrical signal and the second electrical signal are not less than the second threshold, replace the filter of the range hood and turn off the range hood. When the first electrical signal and the second electrical signal are less than the second threshold, the range hood will be turned off.

3. The control method as described in claim 1, characterized in that, Also includes: Determine whether the filter replacement conditions are met based on at least two electrical signals; If the determination result is yes, replace the filter element and / or prompt the user with filter element replacement information.

4. The control method as described in claim 1, characterized in that, Also includes: Determine the operating status of the range hood; Determine the filter replacement conditions that match the operating state; Determine whether the at least two electrical signals meet the filter replacement conditions that match the operating state.

5. A control system for a range hood, characterized in that, The range hood includes a filter element disposed at the air outlet of the range hood, and the system includes: An acquisition module is used to acquire the illumination information of the filter element; wherein the illumination information represents the state of the oil fume. The matching module is used to match the operating strategy based on the illumination information of the filter. The control module is used to control the operation of the range hood based on the operating strategy; The matching module includes: An acquisition unit is used to acquire a first electrical signal and a second electrical signal sequentially output by a photoelectric sensor; wherein the first electrical signal and the second electrical signal are obtained based on the illumination information. A matching unit is configured to match an operating strategy based on the first electrical signal and the second electrical signal; The matching module also includes: The first comparison unit is used to compare the first electrical signal, the second electrical signal, and a threshold; wherein the threshold includes a first threshold and a second threshold, and the first threshold is not greater than the second threshold; The first switching unit is used to start or switch the range hood to a low setting when the first electrical signal and the second electrical signal are not less than the first threshold and the first electrical signal and the second electrical signal are less than the second threshold. The second switching unit is used to start the range hood or switch it to a high-level position when the first electrical signal or the second electrical signal is not less than the second threshold. The threshold also includes a third threshold and a fourth threshold. When the range hood is in the on state, the matching module further includes: The third switching unit is used to maintain or switch the range hood to a low setting when both the first electrical signal and the second electrical signal are not greater than the first threshold and the difference between the first electrical signal and the second electrical signal is not less than the fourth threshold. The fourth switching unit is used to maintain or switch the range hood to a high level when the first electrical signal or the second electrical signal is not less than the second threshold and the first electrical signal or the second electrical signal is less than the third threshold.

6. A range hood, characterized in that, The range hood includes a memory, a processor, and a control program for the range hood stored in the memory and executed on the processor. When the control program is executed by the processor, it implements the steps of the control method as described in any one of claims 1-4.

7. A computer storage medium, characterized in that, The computer storage medium stores a control program for the range hood, which, when executed by a processor, implements the steps of the control method as described in any one of claims 1-4.

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