Smoke suction control method and range hood

Abstract

The invention provides a smoke extraction control method and a range hood, the range hood comprises a smoke extraction system, the smoke extraction system comprises a smoke extraction pipeline, and a diffusion structure, an oil smoke detection structure, a filter screen and a plurality of filter structures which are sequentially arranged in the smoke extraction pipeline, and the diffusion structure is used for adjusting the flow rate of oil smoke gas entering the smoke extraction pipeline. And in the process that the range hood is started and runs, the oil smoke concentration detected by the oil smoke detection structure is obtained, the angle of the diffusion structure is adjusted according to the oil smoke concentration, and whether the filtering mode is started or not is judged according to the oil smoke concentration. And under the condition that the filtering mode is judged to be started, determining a target filtering structure needing to be started in the multiple filtering structures, and controlling the target filtering structure to be started. According to the scheme, the flow speed of the oil fume gas in the fume suction pipeline is adjusted by controlling the diffusion structure, then the filtering effect is adjusted, and the oil fume purification effect is further improved by combining and matching different filtering structures at the rear end.

Description

Technical Field

[0001] The present invention relates to the technical field of kitchen appliances, and in particular, to a smoking control method and a range hood. Background Art

[0002] As people pay more and more attention to health, healthy diet has also attracted more and more attention. The light cooking and the corresponding cooking appliance industry representing healthy diet have developed rapidly in recent years.

[0003] Compared with the problems of high oil fume concentration and large amount of oil fume generated by traditional heavy oil fume cooking, the light cooking method has relatively low oil fume concentration and small amount of oil fume. Therefore, the integrated miniaturized range hood has gradually become the first choice for range hoods in the corresponding light cooking scenarios. Currently, the most representative one is the built-in island range hood.

[0004] However, like traditional range hoods, a good smoking effect is also the most important control goal for such integrated miniaturized range hoods. However, currently, the smoking mode of the smoking system of the range hood is relatively single, and only by adjusting the working gear to meet different smoking requirements, it is difficult to achieve a good balance between energy consumption and smoking effect. Summary of the Invention

[0005] The purpose of the embodiments of the present invention is to provide a smoking control method and a range hood, which are used to adjust the filtering effect to improve the oil fume purification effect.

[0006] In a first aspect, the present invention provides a smoking control method, which is applied to a smoking system in a range hood. The smoking system includes a smoking pipeline and a pressure increasing structure, an oil fume detection structure, a filter screen and a plurality of filtering structures sequentially arranged in the smoking pipeline along the inlet to outlet direction of the smoking pipeline. The pressure increasing structure is used to adjust the flow rate of the oil fume gas entering the smoking pipeline;

[0007] The method includes:

[0008] During the process of starting and running the range hood, obtain the oil fume concentration detected by the oil fume detection structure;

[0009] Adjust the angle of the pressure increasing structure according to the oil fume concentration, and determine whether to turn on the filtering mode according to the oil fume concentration;

[0010] In the case of determining to turn on the filtering mode, determine the target filtering structure to be turned on among the plurality of filtering structures, and control the target filtering structure to be turned on.

[0011] In an optional implementation manner, the smoking system further includes a hot oil structure located between the pressure increasing structure and the filter screen, and the range hood further includes a fan system;

[0012] The method further includes:

[0013] Obtain the working current of the motor in the fan system;

[0014] Control the thermal oil structure according to the working current.

[0015] In an alternative embodiment, the step of controlling the thermal oil structure according to the working current includes:

[0016] Obtain the current working gear of the fan system, and compare the working current with the maximum allowable current corresponding to the current working gear;

[0017] If the working current is greater than or equal to the maximum allowable current, start the thermal oil structure to heat the grease adhered to the smoking pipe and the filter net.

[0018] In an alternative embodiment, the angle of the pressure expanding structure is the initial angle when the range hood is started;

[0019] The step of adjusting the angle of the pressure expanding structure according to the oil fume concentration includes:

[0020] Compare the oil fume concentration with a preset minimum concentration to obtain a comparison result, where the preset minimum concentration is the maximum oil fume concentration that the filter net can filter at the initial angle of the pressure expanding structure;

[0021] If the oil fume concentration is less than the preset minimum concentration, control the pressure expanding structure to maintain the initial angle;

[0022] If the oil fume concentration is greater than or equal to the preset minimum concentration, control the pressure expanding structure to increase the angle on the basis of the initial angle.

[0023] In an alternative embodiment, the step of controlling the pressure expanding structure to increase the angle on the basis of the initial angle if the oil fume concentration is greater than or equal to the preset minimum concentration includes:

[0024] If the oil fume concentration is greater than or equal to the preset minimum concentration and less than or equal to the preset maximum concentration, increase the first angle amount on the basis of the initial angle to obtain the first target angle, and control the pressure expanding structure to adjust to the first target angle;

[0025] Among them, the preset maximum concentration is the maximum oil fume concentration that the filter net and any one filtering structure can jointly filter at the first target angle of the pressure expanding structure;

[0026] If the oil fume concentration is greater than the preset maximum concentration, increase the second angle amount on the basis of the initial angle to obtain the second target angle, and control the pressure expanding structure to adjust to the second target angle, and the second angle amount is greater than the first angle amount.

[0027] In an alternative embodiment, the oil fume concentration includes the oil fume concentration detected at a first time point and the oil fume concentration detected at a second time point, and the second time point is after a set duration from the first time point;

[0028] The steps of adjusting the angle of the diffuser structure according to the oil fume concentration and determining whether to activate the filtration mode according to the oil fume concentration include:

[0029] Adjust the angle of the diffuser structure according to the oil fume concentration detected at the first time point;

[0030] Based on the oil fume concentration detected at the second time point, determine whether to activate the filtration mode.

[0031] In an alternative embodiment, the steps of determining whether to activate the filtration mode based on the oil fume concentration detected at the second time point include:

[0032] Compare the oil fume concentration detected at the second time point with a preset minimum concentration to obtain a comparison result;

[0033] If the oil fume concentration detected at the second time point is less than the preset minimum concentration, it is determined that there is no need to activate the filtration mode;

[0034] If the oil fume concentration detected at the second time point is greater than or equal to the preset minimum concentration, it is determined to activate the filtration mode.

[0035] In an alternative embodiment, the filtration structure includes an electric purification structure and a photocatalyst structure;

[0036] The steps of determining the target filtration structure to be activated among multiple filtration structures include:

[0037] If the oil fume concentration detected at the second time point is less than a set multiple of the preset maximum concentration, determine the electric purification structure or the photocatalyst structure as the target filtration structure;

[0038] If the oil fume concentration detected at the second time point is greater than or equal to the set multiple of the preset maximum concentration, determine both the electric purification structure and the photocatalyst structure as the target filtration structures.

[0039] In an alternative embodiment, the steps of controlling the activation of the target filtration structure include:

[0040] In the case where the electric purification structure is determined as the target filtration structure, determine the filtration level of the electric purification structure according to the oil fume concentration detected at the second time point;

[0041] Activate the electric purification structure and control the electric purification structure to perform a filtration operation according to the filtration level.

[0042] In a second aspect, the present invention provides a range hood, including:

[0043] One or more processors;

[0044] A storage device for storing one or more programs;

[0045] When the one or more programs are executed by the one or more processors, the one or more processors implement the method according to any one of the foregoing embodiments.

[0046] The beneficial effects of the embodiments of the present invention include, for example:

[0047] The present invention provides a smoking control method and a range hood. The range hood includes a smoking system, and the smoking system includes a smoking duct and a diffuser structure, an oil fume detection structure, a filter screen, and a plurality of filtering structures sequentially arranged in the smoking duct. The diffuser structure is used to adjust the flow rate of the oil fume gas entering the smoking duct. During the start-up and operation of the range hood, the oil fume concentration detected by the oil fume detection structure is obtained, the angle of the diffuser structure is adjusted according to the oil fume concentration, and it is determined whether to turn on the filtering mode according to the oil fume concentration. In the case of determining to turn on the filtering mode, the target filtering structure to be turned on among the plurality of filtering structures is determined, and the target filtering structure is controlled to turn on. In this solution, the flow rate of the oil fume gas in the smoking duct is adjusted by controlling the diffuser structure, thereby adjusting the filtering effect, and combining with different filtering structures at the back end to further improve the oil fume purification effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required to be used in the embodiments of the present invention. It should be understood that the following drawings only show some embodiments of the present invention, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0049] Figure 1 It is a schematic structural diagram of the smoking system provided by the embodiment of the present invention;

[0050] Figure 2 It is a schematic structural diagram of the fan system and the heating system provided by the embodiment of the present invention;

[0051] Figure 3 It is a flowchart of the smoking control method provided by the embodiment of the present invention;

[0052] Figure 4 It is a schematic structural diagram of the diffuser structure provided by the embodiment of the present invention;

[0053] Figure 5 It is another schematic structural diagram of the diffuser structure provided by the embodiment of the present invention;

[0054] Figure 6Schematic diagram of the resistance curve and the fan characteristic curve provided by the embodiments of the present invention;

[0055] Figure 7 Curve graph of the corresponding relationship between the working current and the working air volume provided by the embodiments of the present invention;

[0056] Figure 8 Schematic diagram of the overall logic flow of the smoking control method provided by the embodiments of the present invention;

[0057] Figure 9 Functional module block diagram of the smoking control device provided by the embodiments of the present invention;

[0058] Figure 10 Structure block diagram of the range hood provided by the embodiments of the present invention.

[0059] Icon: 1 - Smoking system; 11 - Smoking pipeline; 12 - Diffuser structure; 121 - Crank-slider mechanism; 13 - Oil fume detection structure; 14 - Filter screen; 15 - Filter structure; 16 - Thermal oil structure; 2 - Fan system; 3 - Heating system; 4 - Smoking control device; 41 - Acquisition module; 42 - Adjustment module; 43 - Control module; 51 - Processor; 52 - Storage device; 53 - Input device; 54 - Output device. Detailed implementation manners

[0060] Next, the technical solutions in the embodiments of the present invention will be described with reference to the accompanying drawings in the embodiments of the present invention.

[0061] Please refer to Figure 1 , a partial schematic diagram of the smoking system 1 of the range hood provided by the embodiments of the present invention. The smoking system 1 includes a smoking pipeline 11, and the smoking pipeline 11 includes an inlet ( Figure 1 the a port shown in Figure 1 ) and an outlet (

[0062] the b port shown in Figure 2 ). The smoking system 1 further includes a diffuser structure 12, an oil fume detection structure 13, a filter screen 14, and a plurality of filter structures 15 that are sequentially arranged in the smoking pipeline 11 along the direction from the inlet to the outlet of the smoking pipeline 11. Among them, the angle of the diffuser structure 12 can be adjusted, and the flow rate of the oil fume gas entering the smoking pipeline 11 can be correspondingly adjusted by adjusting the diffuser structure 12.

[0063] The oil fume gas entering the smoking system 1 passes through the filter screen 14 and each filtering structure 15 (when the filtering structure 15 is turned on) in sequence, and after being filtered, the gas is finally discharged into the kitchen space or discharged outdoors.

[0064] In addition, the range hood further includes a controller (not shown in the figure), and the controller can be connected to the fan system 2, the pressure boosting structure 12, the oil fume detection structure 13, the filtering structure 15, etc. In this way, the controller can obtain the operation information of the fan system 2, the pressure boosting structure 12, the oil fume detection structure 13, the filtering structure 15, etc., and can also control the fan system 2, the pressure boosting structure 12, the oil fume detection structure 13, the filtering structure 15, etc.

[0065] Among them, the oil fume detection structure 13 can be, but is not limited to, an optical sensor, a capacitive sensor, an oscillator type sensor, etc.

[0066] Figure 3 It is a flowchart of the smoking control method provided by the embodiment of the present invention. This smoking control method can achieve a good oil fume purification effect by controlling the smoking system 1 of the range hood. This method can be executed by a smoking control device, and the smoking control device can be implemented in the form of hardware and / or software. The smoking control device can be configured in electronic devices such as a range hood, a computer, a server, a tablet computer, or a smart phone.

[0067] Specifically, please refer to Figure 3 , the smoking control method provided in this embodiment includes the following steps:

[0068] S11, during the process of starting and running the range hood, obtain the oil fume concentration detected by the oil fume detection structure.

[0069] S12, adjust the angle of the pressure boosting structure according to the oil fume concentration, and determine whether to turn on the filtering mode according to the oil fume concentration.

[0070] S13, in the case of determining to turn on the filtering mode, determine the target filtering structure to be turned on among the multiple filtering structures, and control the target filtering structure to turn on.

[0071] When cooking is required, the range hood can be turned on to suck the oil fume generated during the cooking process. The way to turn on the range hood can be to control the range hood to turn on through the on button on the range hood, or it can be to send an on command to the range hood through a smart terminal in communication with the range hood to control the range hood to turn on, etc. The implementation form is not specifically limited.

[0072] During the process of turning on the range hood and cooking, the oil fume gas generated by cooking is sucked into the fan system 2. After preliminary filtering treatment in the fan system 2, the oil fume gas still contains a large amount of oil fume. Subsequently, the oil fume gas enters the smoking system 1 to continue the filtering treatment.

[0073] The filtering effects of the filter net 14 and each filtering structure 15 largely depend on the flow rate of the oil fume gas. It can be understood that if the flow rate of the oil fume gas is slower, the adsorption effect of the filter net 14 and each filtering structure 15 on the oil fume is better; on the contrary, the adsorption effect is worse. For example, when the flow rate of the oil fume gas is within 2 m / s, the filtering effects of the filter net 14 and each filtering structure 15 are better. The maximum air volume generated by the range hood can reach 12 m 3 / min. In order to enable the filter net 14 and the filtering structure 15 to achieve good filtering effects under various working conditions, in this embodiment, a pressure boosting structure 12 is provided at the inlet of the smoking pipe 11.

[0074] As Figure 4 shown in, the angle of the pressure boosting structure 12 is adjustable. Among them, the pressure boosting structure 12 includes side plates, one end of the side plate faces the inlet of the smoking pipe 11 ( Figure 4 a port in), and the other end faces the outlet of the smoking pipe 11 ( Figure 4 b port in). Among them, the position of one end of the side plate facing the inlet direction of the smoking pipe 11 is fixed, such as Figure 4 O1 and O2 in. The position of one end of the side plate facing the outlet direction of the smoking pipe 11 is adjustable, so as to realize the angle adjustment of the pressure boosting structure 12. Specifically, it can be adjusted between A1, A2 and B1, B2.

[0075] It can be understood that when the pressure boosting structure 12 is in the positions of O1A1 and O2A2, the cross-sectional area (S1) corresponding to this angle is the smallest. When the pressure boosting structure 12 is in the positions of O1B1 and O2B2, the cross-sectional area (S2) corresponding to this angle is the largest. When the flow rate of the generated oil fume gas is constant, the smaller the cross-sectional area of the pressure boosting structure 12, the greater the flow rate of the oil fume gas entering the smoking pipe 11; and if the cross-sectional area of the pressure boosting structure 12 is larger, the flow rate of the oil fume gas entering the smoking pipe 11 is smaller.

[0076] Taking the above as an example, assuming that the maximum air volume is 12 m 3 / min and the upper limit value of the optimal flow rate is 2 m / s, by inversely calculating the area corresponding to S2, it can be obtained that S2 = 12 / 60 / 2 = 0.1 m 2 . Considering the size of the whole machine, therefore, S2 can be set in the range of 0.1 m 2 ~0.15 m 2 .

[0077] Since there is still a certain distance between the diffuser structure 12 and the filter net 14, if the angle of the diffuser structure 12 is always kept large, the oil fume entering the smoking duct 11 is likely to deposit at the position between the diffuser structure 12 and the filter net 14. Based on this consideration, in this embodiment, when the range hood is started each time, the initial angle of the diffuser structure 12 is defaulted to the minimum angle.

[0078] On this basis, during the operation of the range hood, the oil fume detection structure 13 can detect the oil fume concentration and send the detected oil fume concentration to the controller. The oil fume concentration detected by the oil fume detection structure 13 can reflect the level of the oil fume volume. Therefore, the angle of the diffuser structure 12 can be adjusted in real time in combination with the actual generated oil fume volume. For example, if the oil fume concentration is very high, in order to improve the filtering effect, the angle of the diffuser structure 12 can be increased, so as to improve the filtering effect of the subsequent filter net 14, the filtering structure 15, etc. on the oil fume by reducing the flow rate of the oil fume gas. If the oil fume concentration is relatively low, in order to avoid the deposition of grease at the position between the diffuser structure 12 and the filter net 14, the angle of the diffuser structure 12 can be kept at a relatively small angle.

[0079] Combined Figure 5 As shown in, the diffuser structure 12 further includes a crank-slider mechanism 121, which is connected to the side plate of the diffuser structure 12. The controller can control the movement of the crank-slider mechanism 121, so that the side plate of the diffuser structure 12 rotates around O1 and O2, thereby realizing expansion and contraction.

[0080] In this embodiment, the filter net 14 does not need to be opened or closed, that is, the oil fume entering the smoking duct 11 will all be processed by the filter net 14. Considering that in the case of a low oil fume volume, it may be possible to filter the oil fume cleanly only by filtering the oil fume through the filter net 14. Therefore, when the range hood is started each time, the initial state of each of the rear filter structures 15 is the closed state, so that the energy consumption can be reduced.

[0081] However, if the actually detected oil fume concentration indicates a large oil fume volume, it is necessary to combine the rear filter structure 15 to assist the filter net 14 to perform filtering together. Based on this, in this embodiment, it is possible to determine whether to turn on the filtering mode according to the actually detected oil fume concentration, where the filtering mode referred to here means a mode of starting other filter structures 15 for filtering in addition to the filter net 14.

[0082] In the case of determining that the filtering mode needs to be turned on, since there are multiple rear filter structures 15, it is also possible to determine to turn on one of the filter structures 15 or multiple filter structures 15 based on the specific situation of the oil fume concentration. In this way, effective filtering of the oil fume in various oil fume concentration situations can be achieved.

[0083] The smoking control method provided in this embodiment is based on the actually obtained oil fume concentration. By controlling the diffuser structure 12, the flow rate of the oil fume gas in the smoking pipe 11 is adjusted, thereby adjusting the filtering effect, and combining with different filtering structures 15 at the back end to improve the oil fume purification effect.

[0084] As can be seen from the above, when the range hood is started, the diffuser structure 12 is at the initial angle, and this initial angle is the minimum angle of the diffuser structure 12.

[0085] When adjusting the diffuser structure 12 according to the oil fume concentration, the oil fume concentration can be compared with the preset minimum concentration to obtain a comparison result. This preset minimum concentration is the maximum oil fume concentration that the filter screen 14 can filter at the initial angle of the diffuser structure 12.

[0086] If the oil fume concentration is less than the preset minimum concentration, control the diffuser structure 12 to maintain the initial angle. If the oil fume concentration is greater than or equal to the preset minimum concentration, control the diffuser structure 12 to increase the angle on the basis of the initial angle.

[0087] In this embodiment, when the diffuser structure 12 is at the initial angle, the flow rate of the oil fume gas entering the smoking pipe 11 is assumed to be V1. If the actually generated oil fume concentration is less than the preset minimum concentration, it indicates that at this oil fume concentration and when the flow rate of the oil fume gas is V1, the filter screen 14 can filter the oil fume in the oil fume gas cleanly. Therefore, in this case, the diffuser structure 12 can be controlled to maintain the initial angle.

[0088] If the actually generated oil fume concentration is greater than or equal to the preset minimum concentration, it indicates that at this oil fume concentration, if the flow rate of the oil fume gas is V1, the filter screen 14 cannot filter the oil fume in the oil fume gas cleanly. Therefore, it is necessary to reduce the flow rate of the oil fume gas to improve the filtering effect of the filter screen 14. Therefore, in this case, the diffuser structure 12 can be controlled to increase the angle on the basis of the initial angle to achieve the purpose of reducing the flow rate of the oil fume gas.

[0089] Furthermore, in this embodiment, in addition to considering improving the filtering effect of the filter screen 14 by increasing the angle of the diffuser structure 12, it is also considered that if the amount of oil fume is very large, even if the angle of the diffuser structure 12 is increased to the maximum allowable angle, filtering only through the filter screen 14 may not achieve a good filtering effect. Therefore, in this embodiment, in some cases, the filtering structure 15 at the back end needs to be started to filter together.

[0090] In this embodiment, one or more filtering structures 15 can be started according to the actual situation.

[0091] Therefore, for the adjustment of the angle of the diffuser structure 12, in addition to setting a preset minimum concentration as a comparison basis, a preset maximum concentration can also be set as a comparison basis. Based on the preset minimum concentration and the preset maximum concentration, determine how much to specifically increase the angle of the diffuser structure 12 on the basis of the initial angle.

[0092] In this embodiment, when the oil fume concentration is greater than or equal to the preset minimum concentration and the diffuser structure 12 is controlled to increase the angle on the basis of the initial angle, specifically, if the oil fume concentration is greater than or equal to the preset minimum concentration and less than or equal to the preset maximum concentration, then increase the first angle amount on the basis of the initial angle to obtain the first target angle, and control the diffuser structure 12 to adjust to the first target angle.

[0093] Among them, the preset maximum concentration is the maximum oil fume concentration that the filter screen 14 and any one of the filter structures 15 can jointly filter when the diffuser structure 12 is at the first target angle.

[0094] If the oil fume concentration is greater than the preset maximum concentration, then increase the second angle amount on the basis of the initial angle to obtain the second target angle, and control the diffuser structure 12 to adjust to the second target angle. Among them, the second angle amount is greater than the first angle amount.

[0095] In this embodiment, assume that the initial angle of the diffuser structure 12 is a. When the oil fume concentration is between the preset minimum concentration and the preset maximum concentration, assume that the diffuser structure 12 is adjusted to the first target angle, then the filter screen 14 and a filter structure 15 together can filter the oil fume in the oil fume gas clean. Among them, the first target angle can be, for example, 1.25a.

[0096] If the oil fume concentration is greater than the preset maximum concentration, then the diffuser structure 12 needs to be increased to a larger angle. For example, the second target angle can be 1.5a.

[0097] In this embodiment, the preset minimum concentration and the preset maximum concentration can be determined by conducting experimental verification before the range hood leaves the factory.

[0098] In this embodiment, for the adjustment of the angle of the diffuser structure 12 and the control of each of the subsequent filter structures 15 at the rear end, the overall control logic is that first, the diffuser structure 12 is adjusted based on the detected oil fume concentration. After adjusting the angle of the diffuser structure 12 and running for a period of time, then determine the control scheme for each of the subsequent filter structures 15 based on the oil fume concentration after this period of time. That is, since adjusting the angle of the diffuser structure 12 will affect the filtering effect of the filter screen 14, therefore, the oil fume concentration detected by the oil fume detection structure 13 may change later. If the oil fume concentration can meet certain requirements after the change, then there is no need to turn on the filter structure 15 anymore. If the oil fume concentration still cannot meet the requirements after the change, then it is necessary to control the filter structure 15 to turn on.

[0099] Based on this, in this embodiment, the oil fume concentration includes the oil fume concentration detected at the first time point and the oil fume concentration detected at the second time point. The second time point is after a set duration from the first time point, and the set duration can be, for example, 10 s.

[0100] In the step of adjusting the angle of the diffuser structure 12 according to the oil fume concentration and determining whether to turn on the filtration mode based on the oil fume concentration, the angle of the diffuser structure 12 is adjusted according to the oil fume concentration detected at the first time point, and whether to turn on the filtration mode is determined based on the oil fume concentration detected at the second time point.

[0101] Specifically, the oil fume concentration detected at the second time point can be compared with a preset minimum concentration to obtain a comparison result. If the oil fume concentration detected at the second time point is less than the preset minimum concentration, it is determined that there is no need to turn on the filtration mode. If the oil fume concentration detected at the second time point is greater than or equal to the preset minimum concentration, it is determined to turn on the filtration mode.

[0102] In this embodiment, when the oil fume concentration detected at the second time point is greater than or equal to the preset minimum concentration, it indicates that relying solely on the filter screen 14 for filtration cannot completely filter the oil fume in the oil fume gas. Therefore, it is necessary to turn on the filtration mode to filter together by turning on the filtration structure 15 at the rear end.

[0103] In this embodiment, the filtration structure 15 at the rear end includes an electric purification structure and a photocatalyst structure. In order to reduce energy consumption while achieving a good filtration effect, therefore, it is possible to determine whether to turn on one filtration structure 15 or two filtration structures 15 according to the actual situation.

[0104] Specifically, in this embodiment, when it is determined to turn on the filtration mode, when determining the target filtration structure 15 to be turned on among the multiple filtration structures 15, it can be achieved by the following method:

[0105] If the oil fume concentration detected at the second time point is less than a set multiple of the preset maximum concentration, it is determined that the electric purification structure or the photocatalyst structure is the target filtration structure.

[0106] If the oil fume concentration detected at the second time point is greater than or equal to a set multiple of the preset maximum concentration, it is determined that the electric purification structure and the photocatalyst structure are the target filtration structures.

[0107] As can be seen from the above, the preset maximum concentration is the maximum oil fume concentration that the filter screen 14 and any one of the filtration structures 15 can filter together when the diffuser structure 12 is at a certain angle. And considering that based on the oil fume concentration detected at the first time point, the angle of the diffuser structure 12 may have increased by a certain amount, therefore, a set multiple is multiplied on the basis of the preset maximum concentration as the comparison standard, and the set multiple can be, for example, 1.2.

[0108] That is, when the oil fume concentration detected at the second time point is less than a set multiple of the preset maximum concentration, a good filtering effect can be achieved based on the filter net 14 and a filtering structure 15. Therefore, either the electric purification structure or the photocatalyst structure can be used as the target filtering structure.

[0109] In addition, if the oil fume concentration detected at the second time point is greater than or equal to the set multiple of the preset maximum concentration, it indicates that only increasing the opening of one filtering structure 15 cannot filter the oil fume cleanly, and it is necessary to turn on the electric purification structure and the photocatalyst structure simultaneously. Therefore, the electric purification structure and the photocatalyst structure are used as the target filtering structures.

[0110] When it is determined to turn on the electric purification structure or the photocatalyst structure, the working gear after the electric purification structure or the photocatalyst structure is turned on can also be determined according to the specific situation of the oil fume concentration detected at the second time point.

[0111] Based on this, in this embodiment, in the step of controlling the opening of the target filtering structure, when the electric purification structure is determined as the target filtering structure, the filtering gear of the electric purification structure is determined according to the oil fume concentration detected at the second time point, the electric purification structure is turned on, and the electric purification structure is controlled to perform the filtering operation according to the filtering gear.

[0112] Similarly, when the photocatalyst structure is determined as the target filtering structure, the filtering gear of the photocatalyst structure is determined according to the oil fume concentration detected at the second time point, the photocatalyst structure is turned on, and the photocatalyst structure is controlled to perform the filtering operation according to the filtering gear.

[0113] Among them, the electric purification structure and the photocatalyst structure can each have multiple filtering gears. For example, they can include three filtering gears from low to high. The controller can control their filtering gears by controlling the working current of the electric purification structure and the photocatalyst structure.

[0114] During implementation, the concentration value detected at the second time point can be compared with the preset minimum concentration, the preset maximum concentration, etc. to determine the specific working gear.

[0115] In this embodiment, in addition to considering adjusting the angle of the pressure boosting structure 12 to adjust the flow rate of the oil fume gas entering the smoking pipe 11, thereby improving the filtering effect, it is also considered to combine the filtering structure 15 at the rear end to further achieve a good filtering effect.

[0116] In addition, after the range hood has been used for a long time, more grease may accumulate in the smoking pipe 11 and on the filter net 14, resulting in affecting the flow of the oil fume gas in the smoking pipe 11 and the performance of the range hood.

[0117] Based on this, in the smoking system 1 provided in this embodiment, a hot oil melting structure 16 located in the smoking pipe 11 is further included. The hot oil melting structure 16 is arranged between the diffuser structure 12 and the filter net 14 because grease is extremely likely to accumulate at this position. When the hot oil melting structure 16 is turned on, the grease adhered to the inside of the smoking pipe 11 and the filter net 14 can be melted by heating, which helps to clean and maintain the range hood.

[0118] Since the filter net 14, which is the main filter, will have a layer of grease attached to its surface as the filtering time increases. The longer the time, the greater the thickness of the corresponding grease and the greater the corresponding resistance. If the resistance is allowed to increase without control, it will surely affect the working air volume and ultimately the smoking effect of the whole machine.

[0119] Through simulation and experimental verification, it is found that if the smoking effect of the range hood needs to be ensured, the working air volume of the range hood needs to be greater than or equal to 8 m 3 / min. If the working air volume is less than 7 m 3 / min, the smoking effect will deteriorate sharply. In order to keep the range hood in a better smoking effect state, it is necessary to ensure that the resistance of the rear filter net 14 is within a suitable range.

[0120] The level of the resistance of the filter net 14 can be reflected by the resistance coefficient. There is a corresponding relationship among the working air volume, voltage and resistance coefficient of the range hood, as shown in the following formula:

[0121] P = k * Q 2

[0122] Among them, P represents voltage, Q represents working air volume, and k represents resistance coefficient.

[0123] According to the previous experimental data, the resistance curve and the fan characteristic curve of the range hood are as shown in Figure 6 wherein, Figure 6 the abscissa in is the working air volume Q, the ordinate is the voltage P, the A curve represents the resistance curve, and the B curve represents the fan characteristic curve. Taking the minimum allowable working air volume of 8 m 3 / min as an example, the corresponding voltage can be obtained based on the relationship curve. Combining the above calculation formula, the resistance coefficient k1 in the critical state can be obtained. That is to say, it is necessary to ensure that the actual resistance coefficient is less than the resistance coefficient in the critical state to ensure that the rear filter net 14 has a good filtering effect. Otherwise, it indicates that there is a problem of too thick grease deposited in the smoking pipe 11 and on the filter net 14.

[0124] In addition, the motor in the fan system 2 of the range hood has a corresponding relationship as shown in Figure 7 between the full-condition working air volume and the working current corresponding to a certain gear position, Figure 7The abscissa is the working current I, and the ordinate is the working air volume Q. As the working air volume increases, the working current also increases. That is, under a certain gear operation state, the voltage of the range hood has a one-to-one correspondence with the working air volume, and the working air volume has a one-to-one correspondence with the working current. That is to say, at a certain resistance, the voltage, working air volume, working current, and resistance coefficient of the corresponding working point of the range hood are determined.

[0125] Based on the above analysis, the controller can judge the resistance on the filter net 14 based on the working current of the motor, and further can reflect the deposition degree of grease in the smoking pipe 11 and on the filter net 14.

[0126] Based on this, in the smoking control method provided by this embodiment, the following steps may further be included:

[0127] Obtain the working current of the motor in the fan system 2, and control the thermal oil melting structure according to the working current.

[0128] That is, in this embodiment, it is judged based on the working current whether the resistance of the filter net 14 reaches the allowable value. If it reaches the allowable value, it indicates that too much grease has accumulated on the smoking pipe 11 and the filter net 14. Therefore, it is necessary to turn on the thermal oil melting structure 16 to melt the accumulated grease.

[0129] Considering that the fan system 2 has multiple gears, the corresponding relationship between its operating current and resistance may be different in different gears.

[0130] Therefore, when controlling the thermal oil melting structure 16 according to the working current, the current working gear of the fan system 2 can be obtained, and the working current is compared with the maximum allowable current corresponding to the current working gear. If the working current is greater than or equal to the maximum allowable current, the thermal oil melting structure is started to heat the grease adhered to the smoking pipe 11 and the filter net 14.

[0131] In the above way, when there is more accumulated grease, heating treatment can be carried out through the thermal oil melting structure 16, so as to facilitate cleaning, or make the dissolved grease flow with the oil fume gas and then be filtered through the filtering structure 15.

[0132] In addition, in this embodiment, if the above situation occurs, a prompt message may also be sent to prompt the user to replace or clean the filter net 14 to ensure that the range hood can work in a good filtering state subsequently.

[0133] In order to enable those skilled in the art to have a clearer understanding of the smoking control method provided by this embodiment, the following is combined with Figure 8 as shown in, to illustrate the overall control logic of a possible implementation manner in the smoking control method provided by this embodiment.

[0134] After the range hood is turned on, the angle of the diffuser structure 12 is the initial angle a.

[0135] During the operation of the range hood, the oil fume detection structure 13 continuously detects the oil fume concentration entering the smoking pipe 11 and sends the detected oil fume concentration to the controller.

[0136] The controller obtains the oil fume concentration C0 detected at the first time point and compares C0 with the preset minimum concentration C1 and the preset maximum concentration C2.

[0137] If C0 is less than C1, there is no need to adjust the angle of the diffuser structure 12, and the diffuser structure 12 is kept working at the initial angle.

[0138] In this case, the controller can also obtain the detected oil fume concentration C0' at the second time point after the set duration at the first time point, and compare C0' with C1 and C2 to determine whether to turn on the filtration structure 15. However, in this case, the subsequently detected oil fume concentration is generally less than C1. Therefore, it is defaulted that there is no need to turn on the filtration structure 15 in this case. Therefore, in actual implementation, it is not necessary to obtain the oil fume concentration at the second time point and make a judgment.

[0139] If C0 is greater than or equal to C1 and less than or equal to C2, the angle of the diffuser structure 12 needs to be increased, for example, increased to 1.25a. And after the first time point, continue for the set duration. The set duration can be 10s for example. After reaching the second time point, obtain the oil fume concentration C0' at the second time point, and compare C0' with C1 and C2 to determine whether to turn on the filtration structure 15 and the filtration gear of the filtration structure 15.

[0140] Specifically, if C0' is less than C1, it is determined that there is no need to turn on the filtration structure 15, and the diffuser structure 12 can be kept working at an angle of 1.25a.

[0141] If C0' is greater than or equal to C1 and less than or equal to 0.5 times the sum of C1 and C2, it is determined that the electric purification structure needs to be turned on, and the electric purification structure is controlled to operate at a low gear. Among them, the electric purification structure has three gears: low gear, medium gear, and high gear, and the filtration intensity of these three gears gradually increases.

[0142] If C0' is greater than 0.5 times the sum of C1 and C2 and less than or equal to C2, it is determined that the electric purification structure needs to be turned on, and the electric purification structure is controlled to operate at a medium gear.

[0143] If C0 is greater than C2, it is necessary to increase the angle of the diffuser structure 12, for example, increase it to 1.5a. After a continuous set duration, obtain the oil fume concentration C0' detected at the second time point, and based on C0' to determine whether to turn on the filtering structure 15 and the filtering gear of the filtering structure 15.

[0144] Specifically, if C0' is less than C1, there is no need to turn on the filtering structure 15.

[0145] If C0' is greater than or equal to C1 and less than or equal to 1.2 times of C2, it is determined to start the electric purification structure and control the electric purification structure to operate at medium gear.

[0146] If C0' is greater than 1.2 times of C2, it is determined to start the electric purification structure and operate at high gear, and further, start the photocatalyst structure.

[0147] It should be noted that the specific multiples and other values involved above are only for illustrative purposes, and can be set according to actual needs during implementation. This embodiment does not limit this.

[0148] In the smoking control method provided in this embodiment, based on the oil fume concentration detected during the cooking process, the diffuser structure 12 and the filtering structure 15 are adjusted, so that the oil fume gas can be filtered by the filter net 14 and the filtering structure 15 at a more appropriate flow rate, and the appropriate filtering structure 15 is matched according to specific situations to achieve a good filtering effect.

[0149] Furthermore, the working current is detected to determine the resistance of the filter net 14, and then it is inferred whether there is a serious problem of oil accumulation. In the case of serious oil accumulation, the hot oil melting structure 16 is turned on to melt the oil, which is convenient for cleaning and improves the filtering effect. And it can prompt the user to replace or clean the filter net 14 to ensure that the range hood works in a good condition subsequently.

[0150] Please refer to Figure 9 , this embodiment of the present invention also provides a smoking control device 4, which can be applied to control the exhaust of the range hood. The device can be implemented by software and / or hardware and is generally integrated in the control system of the range hood.

[0151] As Figure 9 shown in, the smoking control device 4 includes an acquisition module 41, an adjustment module 42 and a control module 43. The functions of each functional module of the smoking control device 4 will be elaborated in detail below.

[0152] The acquisition module 41 is used to obtain the oil fume concentration detected by the oil fume detection structure 13 during the process of starting and running of the range hood;

[0153] An adjustment module 42 is configured to adjust the angle of the diffuser structure 12 according to the oil fume concentration, and determine whether to activate the filtration mode based on the oil fume concentration.

[0154] A control module 43 is configured to, when it is determined that the filtration mode is activated, determine a target filtration structure 15 to be activated among a plurality of filtration structures 15, and control the activation of the target filtration structure 15.

[0155] The smoking control device 4 provided in this embodiment can, during the startup and operation of the range hood, obtain the oil fume concentration detected by the oil fume detection structure 13 through the acquisition module 41, adjust the angle of the diffuser structure 12 according to the oil fume concentration through the adjustment module 42, and determine whether to activate the filtration mode based on the oil fume concentration. Finally, when it is determined that the filtration mode is activated, the control module 43 determines a target filtration structure among the plurality of filtration structures 15 and controls the activation of the target filtration structure.

[0156] In this solution, by controlling the diffuser structure 12 to adjust the flow rate of the oil fume gas in the smoking duct 11, thereby adjusting the filtration effect, and combining with different filtration structures 15 at the back end to improve the oil fume purification effect.

[0157] The above-mentioned smoking control device 4 can execute the smoking control method provided in any embodiment of the present invention, and has corresponding functional modules and beneficial effects for executing the method.

[0158] Figure 10 is a schematic structural diagram of a range hood provided in an embodiment of the present invention, as Figure 10 shown, the range hood includes one or more processors 51 and a storage device 52; the processors 51 in the device can be one or more, Figure 10 taking one processor 51 as an example; the storage device 52 is used to store one or more programs; the one or more programs are executed by the one or more processors 51, so that the one or more processors 51 implement the smoking control method according to any one of the embodiments of the present invention.

[0159] The range hood may further include: an input device 53 and an output device 54.

[0160] The processors 51, storage device 52, input device 53, and output device 54 in the range hood can be connected through a bus or other means, Figure 10 taking connection through a bus as an example.

[0161] The storage device 52 in the device, as a computer-readable storage medium, can be used to store one or more programs, which can be software programs, computer-executable programs, and modules, such as the program instructions / modules corresponding to the smoking control method provided in the embodiments of the present invention. The processor 51 executes various functional applications and data processing of the terminal device by running the software programs, instructions, and modules stored in the storage device 52, that is, to implement the smoking control method in the above method embodiments.

[0162] The storage device 52 may include a program storage area and a data storage area. Among them, the program storage area can store an operating system and application programs required for at least one function; the data storage area can store data created according to the use of the device, etc. In addition, the storage device 52 may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one magnetic disk storage device, a flash memory device, or other non-volatile solid-state storage devices.

[0163] In some instances, the storage device 52 may further include a memory remotely provided with respect to the processor 51, and these remote memories can be connected to the device through a network. Examples of the above network include but are not limited to the Internet, an enterprise intranet, a local area network, a mobile communication network, and combinations thereof.

[0164] The input device 53 can be used to receive input digital or character information, and generate key signal inputs related to the user settings and function control of the device. The output device 54 may include a display device such as a display screen.

[0165] And when one or more programs included in the above device are executed by one or more processors 51, the programs perform the following operations:

[0166] During the process of starting and running the range hood, obtain the oil fume concentration detected by the oil fume detection structure 13;

[0167] Adjust the angle of the pressure boosting structure 12 according to the oil fume concentration, and determine whether to turn on the filtration mode according to the oil fume concentration;

[0168] In the case of determining to turn on the filtration mode, determine the target filtration structure to be turned on among the multiple filtration structures 15, and control the target filtration structure to turn on.

[0169] The embodiments of the present invention provide a computer-readable storage medium, on which a computer program is stored. When the program is executed by the processor 51, it is used to execute the smoking control method, and the method includes:

[0170] During the process of starting and running the range hood, obtain the oil fume concentration detected by the oil fume detection structure 13;

[0171] Adjust the angle of the diffuser structure 12 according to the oil fume concentration, and determine whether to turn on the filtration mode according to the oil fume concentration;

[0172] When it is determined to turn on the filtration mode, determine the target filtration structure to be turned on among the multiple filtration structures 15, and control the target filtration structure to turn on.

[0173] Optionally, when the program is executed by the processor 51, it can also be used to execute the smoking control method provided by any embodiment of the present invention.

[0174] The computer storage medium of the embodiment of the present invention can adopt any combination of one or more computer-readable media. The computer-readable medium can be a computer-readable signal medium or a computer-readable storage medium. The 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 of the above. More specific examples of the computer-readable storage medium include: an electrical connection having one or more wires, a portable computer disk, a hard disk, a random access memory (Random Access Memory, RAM), a read-only memory (Read Only Memory, ROM), an erasable programmable read-only memory (Erasable Programmable Read Only Memory, EPROM), a flash memory, an optical fiber, a portable CDROM, an optical storage device, a magnetic storage device, or any suitable combination of the above. The computer-readable storage medium can be any tangible medium that contains or stores a program, and the program can be used by or in combination with an instruction execution system, apparatus, or device.

[0175] The computer-readable signal medium can include a data signal propagated in a baseband or as part of a carrier wave, which carries the computer-readable program code. Such a propagated data signal can take various forms, including but not limited to: electromagnetic signals, optical signals, or any suitable combination of the above. The computer-readable signal medium can also be any computer-readable medium other than the computer-readable storage medium, and this computer-readable medium can send, propagate, or transmit a program for use by or in combination with an instruction execution system, apparatus, or device.

[0176] The program code included on the computer-readable medium can be transmitted by any suitable medium, including but not limited to: wireless, wire, optical cable, radio frequency (Radio Frequency, RF), etc., or any suitable combination of the above.

[0177] Computer program code for performing the operations of the present invention may be written in one or more programming languages or combinations thereof. The programming languages include object-oriented programming languages such as Java, Smalltalk, C++, and also include conventional procedural programming languages such as the "C" language or similar programming languages. The program code may be executed entirely on the user's computer, partially on the user's computer, executed as a stand-alone software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computer (e.g., connected through the Internet using an Internet service provider).

[0178] Note that the above is only the preferred embodiment of the present invention and the technical principles applied. Those skilled in the art will understand that the present invention is not limited to the specific embodiments here. Various obvious changes, re-adjustments, and substitutions can be made by those skilled in the art without departing from the protection scope of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments. Without departing from the concept of the present invention, more other equivalent embodiments may be included, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A smoking control method, characterized in that: A smoke extraction system used in a range hood, the smoke extraction system comprising a smoke extraction pipe and a pressure diffuser structure, a smoke detection structure, a filter screen and a plurality of filter structures sequentially arranged in the smoke extraction pipe from the inlet to the outlet, the pressure diffuser structure being used to adjust the flow rate of the smoke gas entering the smoke extraction pipe; The method comprises: During the startup and operation of the range hood, obtaining the oil fume concentration detected by the oil fume detection structure; adjusting the angle of the pressure diffuser structure according to the oil fume concentration, and determining whether to start the filtering mode according to the oil fume concentration; When it is determined that the filtering mode is turned on, a target filtering structure to be turned on among the plurality of filtering structures is determined, and the target filtering structure is controlled to be turned on.

2. The smoking control method according to claim 1, characterized in that: The smoke extraction system further comprises an oil heating structure located between the pressure diffuser structure and the filter screen, and the range hood further comprises a fan system; The method further comprises: Obtaining the operating current of the motor in the fan system; The thermal oil structure is controlled according to the working current.

3. The smoking control method according to claim 2, characterized in that: The step of controlling the thermal oil structure according to the working current comprises: Obtaining a current working gear of the fan system, and comparing the working current with a maximum allowable current corresponding to the current working gear; If the working current is greater than or equal to the maximum allowable current, the oil heating structure is started to heat the grease adhered to the smoke pipe and the filter.

4. The smoking control method according to claim 1, characterized in that: When the range hood is started, the angle of the pressure diffuser structure is the initial angle; The step of adjusting the angle of the pressure diffuser structure according to the fume concentration comprises: Comparing the oil smoke concentration with a preset minimum concentration to obtain a comparison result, wherein the preset minimum concentration is the maximum oil smoke concentration that can be filtered by the filter net at the initial angle of the pressure diffuser structure; If the oil smoke concentration is less than the preset minimum concentration, controlling the diffuser structure to maintain the initial angle; If the oil smoke concentration is greater than or equal to the preset minimum concentration, the diffuser structure is controlled to increase the angle based on the initial angle.

5. The smoking control method according to claim 4, characterized in that: The step of controlling the diffuser structure to increase the angle based on the initial angle if the oil smoke concentration is greater than or equal to the preset minimum concentration comprises: If the oil smoke concentration is greater than or equal to the preset minimum concentration and less than or equal to the preset maximum concentration, a first angle is added to the initial angle to obtain a first target angle, and the diffuser structure is controlled to adjust to the first target angle; Wherein, the preset maximum concentration is the maximum oil smoke concentration that can be filtered by the filter screen and any one of the filter structures together when the pressure diffusion structure is at the first target angle; If the oil smoke concentration is greater than the preset maximum concentration, a second angle is added to the initial angle to obtain a second target angle, and the diffuser structure is controlled to adjust to the second target angle, where the second angle is greater than the first angle.

6. The smoking control method according to claim 1, characterized in that: The oil fume concentration includes the oil fume concentration detected at a first time point and the oil fume concentration detected at a second time point, the second time point being a set time later than the first time point; The step of adjusting the angle of the pressure diffuser structure according to the oil fume concentration and determining whether to start the filtering mode according to the oil fume concentration includes: adjusting the angle of the pressure diffuser structure according to the oil smoke concentration detected at the first time point; Whether to start the filtering mode is determined based on the oil smoke concentration detected at the second time point.

7. The smoking control method according to claim 6, characterized in that: The step of judging whether to start the filtering mode based on the oil smoke concentration detected at the second time point includes: Comparing the oil smoke concentration detected at the second time point with a preset minimum concentration to obtain a comparison result; If the oil smoke concentration detected at the second time point is less than the preset minimum concentration, it is determined that there is no need to turn on the filtering mode; If the oil smoke concentration detected at the second time point is greater than or equal to the preset minimum concentration, it is determined to start the filtering mode.

8. The smoking control method according to claim 7, characterized in that: The filtering structure includes an electric purification structure and a photocatalyst structure; The step of determining a target filtering structure to be enabled among the plurality of filtering structures comprises: If the oil smoke concentration detected at the second time point is less than a set multiple of the preset maximum concentration, determining the electric purification structure or the photocatalyst structure as the target filtering structure; If the oil smoke concentration detected at the second time point is greater than or equal to a set multiple of the preset maximum concentration, the electric purification structure and the photocatalyst structure are determined to be target filtering structures.

9. The smoking control method according to claim 8, characterized in that: The step of controlling the target filtering structure to be enabled comprises: In the case where the electric purification structure is determined as the target filtering structure, determining the filtering gear of the electric purification structure according to the oil smoke concentration detected at the second time point; The electric purification structure is turned on and controlled to perform a filtering operation according to the filtering gear.

10. A range hood, characterized in that: include: one or more processors; A 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 method according to any one of claims 1 to 9.

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