Range hood and noise reduction control method thereof

Abstract

The application provides an oil fume exhaust machine and a noise reduction control method thereof, and relates to the technical field of kitchen appliances, wherein a dynamic noise reduction assembly is arranged below a fan volute of the oil fume exhaust machine, and the method comprises the following steps: in response to a start operation of the oil fume exhaust machine, obtaining a cooking state of the oil fume exhaust machine; in the cooking state, obtaining an air outlet resistance of the oil fume exhaust machine; and based on the air outlet resistance, adjusting the distance of the dynamic noise reduction assembly relative to the fan volute to dynamically reduce the noise of the oil fume exhaust machine. The oil fume exhaust machine and the noise reduction control method thereof provided by the application can realize real-time self-adaptive noise reduction adjustment of the oil fume exhaust machine under different air outlet resistance states and for different cooking states, because the dynamic noise reduction assembly is adjusted based on the air outlet resistance, thereby not only reducing the working noise of the oil fume exhaust machine, but also helping to improve the user experience and improve the user experience degree.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of kitchen appliances, in particular to an extractor hood and a noise reduction control method thereof. BACKGROUND

[0002] The extractor hood, also known as an oil fume hood, a smoke extractor, etc., is usually an important noise source in a user's home. The extractor hood often produces noise during operation, affecting the user experience. On the one hand, the fan part of the extractor hood is very close to the user, and the working noise of the extractor hood is relatively large. In addition, due to the time difference in cooking by users in the building, when the cooking is in the low peak period, the public flue resistance is small, and the exhaust is smooth; when the cooking is in the high peak period, the public flue resistance is large, and the exhaust is difficult; the user's living floor also has an impact, the public flue resistance of the high floor is small, and the exhaust is smooth; the public flue resistance of the low floor is large, and the exhaust is difficult. These factors will affect the smoke suction effect and the noise produced by the extractor hood.

[0003] In order to ensure the smoke suction effect, more and more manufacturers now launch variable frequency control extractor hoods, which can adjust the speed of the fan motor in real time according to the resistance change. When the resistance is large, the speed is increased to ensure the smoke suction efficiency, but it also brings the problem of increased noise.

[0004] Therefore, in order to improve the noise reduction effect of the extractor hood, various manufacturers try to add a noise reduction device to the extractor hood to reduce the noise produced during the operation of the extractor hood. However, the working condition of the extractor hood is usually changing, and the noise reduction device is usually difficult to adapt to the changing working condition of the extractor hood, resulting in that the noise reduction effect of the extractor hood cannot reach the expectation, thereby affecting the user experience. SUMMARY

[0005] Therefore, the purpose of the present application is to provide an extractor hood and a noise reduction control method thereof to alleviate the above technical problems.

[0006] In a first aspect, an embodiment of the present application provides a noise reduction control method of an extractor hood, the extractor hood being provided with a dynamic noise reduction assembly below a fan volute for dynamically reducing noise of the extractor hood; the method comprising: in response to a start operation of the extractor hood, acquiring a cooking state of the extractor hood; in the cooking state, acquiring an outlet resistance of the extractor hood; and adjusting a distance of the dynamic noise reduction assembly relative to the fan volute based on the outlet resistance to dynamically reduce noise of the extractor hood.

[0007] In combination with the first aspect, an embodiment of the present application provides a first possible implementation manner of the first aspect, wherein the extractor hood is provided with an infrared detection device; and the step of acquiring the cooking state of the extractor hood comprises: detecting a cooking state of a cooking range corresponding to the extractor hood by the infrared detection device.

[0008] With the first possible implementation manner of the first aspect, the second possible implementation manner of the first aspect is provided, wherein the range hood is a double-cavity range hood, and the cooker corresponding to the range hood is a double-cooker; the step of detecting the cooking state of the cooker corresponding to the range hood by the infrared detection device comprises: detecting the opening state of the cooker of the range hood by the infrared detection device; if any one of the cookers is opened, the cooking state is determined as a single-cooker cooking state; if both of the cookers are opened, the cooking state is determined as a double-cooker cooking state; if neither of the cookers is opened, the cooking state is determined as a non-cooking state.

[0009] With the first aspect, the third possible implementation manner of the first aspect is provided, wherein the step of obtaining the outlet resistance of the range hood in the cooking state comprises: obtaining the operating parameter of the fan in the cooking state; and searching for the outlet resistance corresponding to the operating parameter of the fan in a pre-stored operating parameter reference table; wherein the operating parameter reference table stores the corresponding relationship between the operating parameter of the fan and the outlet resistance.

[0010] With the first aspect, the fourth possible implementation manner of the first aspect is provided, wherein the step of adjusting the distance of the dynamic noise reduction component relative to the fan volute based on the outlet resistance comprises: if the outlet resistance is greater than a pre-set resistance threshold, driving the dynamic noise reduction component to move away from the fan volute according to a pre-set dynamic parameter, so as to increase the distance of the dynamic noise reduction component relative to the fan volute; and if the outlet resistance is not greater than the resistance threshold, driving the dynamic noise reduction component to move close to the fan volute according to the pre-set dynamic parameter, so as to reduce the distance of the dynamic noise reduction component relative to the fan volute.

[0011] The second aspect, the embodiment of the application further provides a range hood, comprising a range hood body, a dynamic noise reduction component arranged below the fan volute of the range hood, and a driving mechanism cooperating with the dynamic noise reduction component; the driving mechanism is drivingly connected with a controller of the range hood; the controller is configured to execute the method of the first aspect, and the distance of the dynamic noise reduction component relative to the fan volute is adjusted by the driving mechanism, so as to perform dynamic noise reduction processing on the range hood.

[0012] With the second aspect, the first possible implementation manner of the second aspect is provided, wherein the range hood further comprises a first guide plate and a second guide plate; a pre-set gap is arranged between the first guide plate and the second guide plate, and the first guide plate and the second guide plate are symmetrically distributed in a V-shaped structure on both sides of the dynamic noise reduction component; the cavity of the V-shaped structure faces the fan volute.

[0013] With reference to the second aspect, the second possible implementation manner of the second aspect is provided in the embodiments of the present application, wherein the dynamic noise reduction assembly comprises a noise reduction plate; and the driving mechanism cooperates with the noise reduction plate to adjust the distance between the noise reduction plate and the fan volute.

[0014] With reference to the second possible implementation manner of the second aspect, the third possible implementation manner of the second aspect is provided in the embodiments of the present application, wherein the driving mechanism comprises a motor mounting frame, a motor, a screw rod, and a sliding rail cooperating with the screw rod; the motor is mounted on the motor mounting frame, and the driving end of the motor is connected with the screw rod; the sliding rail is arranged inside the noise reduction plate, and the screw rod extends into the sliding rail; the motor drives the screw rod to rotate under the driving of the controller, so that the movement between the screw rod and the cooperating sliding rail is generated, thereby driving the noise reduction plate to rise or fall to adjust the distance between the noise reduction plate and the fan volute.

[0015] With reference to the second possible implementation manner of the second aspect, the fourth possible implementation manner of the second aspect is provided in the embodiments of the present application, wherein at least one noise reduction hole is arranged on the noise reduction plate, and an acoustic absorption structure is arranged inside the noise reduction plate.

[0016] With reference to the second aspect, and the first to fourth possible implementation manners of the second aspect, the fifth possible implementation manner of the second aspect is provided in the embodiments of the present application, wherein the range hood is a double-cavity range hood; the pot stove corresponding to the range hood is a double-pot stove; the smoke collecting cavity of the double-cavity range hood is provided with a smoke baffle corresponding to each pot stove, and a push rod structure corresponding to each smoke baffle; the controller is further configured to control the opening state of the smoke baffle through the push rod structure.

[0017] With reference to the fifth possible implementation manner of the second aspect, the sixth possible implementation manner of the second aspect is provided in the embodiments of the present application, wherein the range hood further comprises an infrared detection device connected with the controller; the detection area of the infrared detection device corresponds to the pot stove, and is configured to detect the cooking state of the pot stove; the controller is further configured to control the opening state of the smoke baffle based on the cooking state.

[0018] The embodiments of the present application bring the following beneficial effects:

[0019] The range hood and the noise reduction control method thereof provided in the embodiments of the present application can acquire the cooking state of the range hood in response to the start operation of the range hood; then the outlet resistance of the range hood is acquired under the cooking state; and the distance between the dynamic noise reduction assembly and the fan volute is adjusted based on the outlet resistance to perform dynamic noise reduction processing on the range hood. Since the dynamic noise reduction assembly is adjusted based on the outlet resistance, the range hood can realize real-time adaptive noise reduction adjustment for different cooking states under different outlet resistance states, thereby reducing the working noise of the range hood, improving the user experience, and improving the user experience degree.

[0020] Other features and advantages of the present application will be set forth in the descriptions that follow, and in part will be apparent from the description, or can be learned by practice of the application. The purposes and other advantages of the application will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

[0021] To make the above objectives, features and advantages of the present application more apparent, the following will specifically describe a preferred embodiment in combination with the accompanying drawings, and the detailed description is as follows. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the specific embodiments or the prior art description. Obviously, the drawings described below are some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0023] Figure 1 An internal structure diagram of an oil smoke machine provided by the embodiment of the present application;

[0024] Figure 2 A sectional view of an oil smoke machine provided by the embodiment of the present application;

[0025] Figure 3 A structural schematic diagram of a driving mechanism provided by the embodiment of the present application;

[0026] Figure 4 A structural schematic diagram of a noise reduction plate provided by the embodiment of the present application;

[0027] Figure 5 A flow chart of a noise reduction control method of an oil smoke machine provided by the embodiment of the present application;

[0028] Figure 6 A schematic diagram of the rising of a dynamic noise reduction assembly provided by the embodiment of the present application;

[0029] Figure 7 A schematic diagram of the falling of a dynamic noise reduction assembly provided by the embodiment of the present application;

[0030] Figure 8 A flow chart of another noise reduction control method of an oil smoke machine provided by the embodiment of the present application;

[0031] Figure 9 A structural schematic diagram of a noise reduction control device of an oil smoke machine provided by the embodiment of the present application;

[0032] Figure 10A structural schematic diagram of an electronic device provided by an embodiment of the present application.

[0033] Fig. 1 is a structural schematic diagram of an oil fume extractor according to an embodiment of the present application. Fig. 2 is a structural schematic diagram of an oil fume extractor according to another embodiment of the present application. Fig. 3 is a structural schematic diagram of an oil fume extractor according to another embodiment of the present application. Fig. 4 is a structural schematic diagram of an oil fume extractor according to another embodiment of the present application. Fig. 5 is a structural schematic diagram of an oil fume extractor according to another embodiment of the present application. Fig. 6 is a structural schematic diagram of an oil fume extractor according to another embodiment of the present application. DETAILED DESCRIPTION

[0034] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions of the present application will be described below in detail with reference to the accompanying drawings. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0035] Generally, in order to improve the noise reduction effect of the oil fume extractor, in the related art, a noise reduction device is usually added to the oil fume extractor to reduce the noise generated during the operation of the oil fume extractor. However, most of the noise reduction devices of the oil fume extractor use a noise reduction system to reduce the noise of the whole oil fume extractor, which is difficult to adaptively reduce the noise according to the working condition of the oil fume extractor, so that the noise reduction effect of the oil fume extractor cannot reach the expected effect, thereby affecting the user experience.

[0036] Therefore, the oil fume extractor and the noise reduction control method thereof according to the embodiments of the present application can effectively alleviate the above technical problems to realize adaptive noise reduction processing of the oil fume extractor.

[0037] In order to facilitate the understanding of the present embodiment, first, a kind of oil fume extractor disclosed by the embodiments of the present application will be described in detail.

[0038] It should be understood that the oil fume extractor in the embodiments of the present application is also called an oil fume extractor, an oil fume extractor, a smoke machine, etc., and the embodiments of the present application do not limit this.

[0039] In a specific implementation, the range hood provided by the embodiment of the present application includes a range hood body, a dynamic noise reduction assembly arranged below a fan volute of the range hood, and a driving mechanism cooperating with the dynamic noise reduction assembly; the range hood body is arranged in a shell of the range hood, and the fan volute, as a fan assembly, is also generally arranged in the shell. The driving mechanism is in driving connection with a controller of the range hood; the controller is used to execute the noise reduction control method of the range hood of the embodiment of the present application, and the distance of the dynamic noise reduction assembly relative to the fan volute is adjusted by the driving mechanism to dynamically reduce the noise of the range hood.

[0040] Further, the range hood in the embodiment of the present application is also provided with a first guide plate and a second guide plate; a preset gap is arranged between the first guide plate and the second guide plate, and the first guide plate and the second guide plate are symmetrically distributed in a V-shaped structure on both sides of the dynamic noise reduction assembly; the cavity of the V-shaped structure faces the fan volute.

[0041] In a specific implementation, the first guide plate and the second guide plate are split guide plates, which are generally fixed to the shell by a fixing member such as a screw and form a V-shaped structure.

[0042] In order to facilitate understanding, Figure 1 An internal structure diagram of a range hood is shown, specifically, Figure 1 A partial internal structure diagram is shown, therefore, Figure 1 Only the fan volute 101, the dynamic noise reduction assembly 102, and the first guide plate 103 and the second guide plate 104 are shown.

[0043] Based on Figure 1 The structure shown, relative to the dynamic noise reduction assembly 102, the first guide plate 103 and the second guide plate 104 can also be called left and right guide plates. And below the fan volute 101, by arranging a pair of split first guide plates 103 and second guide plates 104, the airflow can be shunted and dredged.

[0044] And, by Figure 1 It can be seen that the split left and right guide plates arranged below the fan volute 101 are arranged in a V-shaped structure, and a preset gap d exists in the middle, the range of d is usually 15-25 mm, the airflow entering through the oil collecting cavity oil screen can be shunted and dredged, and respectively flows to the air inlets of the left and right fan volutes. And in the middle part of the first guide plate 103 and the second guide plate 104, since the preset gap is arranged, the dynamic noise reduction assembly 102 of the embodiment of the present application can be arranged, and through the control process of the controller, the dynamic noise reduction assembly 102 can be made to rise or fall with the working condition change of the range hood.

[0045] Further, the dynamic noise reduction assembly 102 in the embodiment of the present application can be mounted in the double-cavity range hood, and can realize self-adaptive noise reduction under different working conditions according to the change of the air outlet resistance.

[0046] For ease of understanding, Figure 2 Also shown is a cross-sectional view of a range hood, wherein, Figure 2 In the embodiment of the present application, the range hood is taken as an example, i.e., the range hood in the embodiment of the present application is a double-cavity range hood; at this time, the corresponding cooking range of the range hood is generally also a double-cooking range; and the double-cavity range hood is provided with a smoke baffle corresponding to each cooking range and a push rod structure corresponding to each smoke baffle; the controller is further configured to control the opening state of the smoke baffle through the push rod structure.

[0047] In the embodiment of the present application, Figure 2 In the embodiment of the present application, the smoke baffles are denoted as a left smoke baffle 201 and a right smoke baffle 202, and the corresponding push rod structures are a left smoke baffle push rod structure 203 and a right smoke baffle push rod structure 204, respectively, and Figure 2 In the embodiment of the present application, a left oil screen 205 and a right oil screen 206 corresponding to the double-cooking range are also shown.

[0048] Further, Figure 2 The range hood in the embodiment of the present application further comprises an infrared detection device 207 connected with the controller, a detection area of the infrared detection device 207 corresponding to the cooking range, for detecting the cooking state of the cooking range; the controller is further configured to control the opening state of the smoke baffle based on the cooking state.

[0049] In actual use, the left and right smoke baffles of the double-cavity range hood can be opened and closed individually, and generally, through the infrared detection function of the infrared detection device 207, automatic identification of the cooking state of the left and right cooking ranges of the user can be realized, for example, through temperature detection by the infrared detection function, it can be known whether the left and right cooking ranges are opened for cooking, etc., after the controller obtains the detection signal of the infrared detection device 207, further switching actions of the left and right smoke baffles can be performed.

[0050] Further, the dynamic noise reduction assembly 102 in the embodiment of the present application comprises a noise reduction plate; the driving mechanism cooperates with the noise reduction plate to adjust the distance of the noise reduction plate relative to the fan volute.

[0051] For ease of understanding, Figure 3 A structural schematic diagram of a driving mechanism is shown, and Figure 4 A structural schematic diagram of a noise reduction plate is shown, and Figure 3 Part of the structure of the noise reduction plate is also shown, and Figure 4 Part of the structure of the driving mechanism is also shown, such as Figure 3 and Figure 4As shown, the drive mechanism includes a motor mounting bracket 301, a motor 302, a screw 303, and a slide rail 304 that cooperates with the screw 303; wherein, the motor 302 is mounted on the motor mounting bracket 301, the motor mounting bracket 301 is mounted below the fan volute 101, the drive end of the motor 302 is connected to the screw 303, and the control end is connected to the controller.

[0052] The slide rail 304 is located inside the noise reduction plate 400, and the screw 303 extends into the slide rail 304. Under the drive of the controller, the motor 302 drives the screw 303 to rotate, so that the screw 303 and the slide rail 304 move together, thereby driving the noise reduction plate 400 to rise or fall, so as to adjust the distance between the noise reduction plate 400 and the fan volute 101.

[0053] Furthermore, the noise reduction plate 400 has at least one noise reduction hole 401, and the noise reduction plate 400 has a sound absorption structure 402 inside, such as a sound absorption structure made of sound absorption materials such as sound absorption cotton.

[0054] Typically, the thickness of the noise reduction plate 400 is less than the middle part of the first guide plate 103 and the second guide plate 104, that is, less than the preset gap d. The lower end of the noise reduction plate 400 is V-shaped. When it rises to the top, the tip of the lower V-shape can block the middle gap between the two guide plates, thus preventing airflow from entering the middle gap between the two guide plates and causing turbulence and abnormal noise.

[0055] Furthermore, based on the above Figures 1-4 The invention provides a noise reduction control method for a range hood, as illustrated in the structure of the range hood shown. Specifically, the dynamic noise reduction component described above is provided below the fan casing of the range hood in this embodiment of the invention, for dynamically reducing noise in the range hood; as shown in the diagram. Figure 5 The flowchart shown illustrates a noise reduction control method for a range hood, including the following steps:

[0056] Step S502: Respond to the power-on operation of the range hood and obtain the cooking status of the range hood;

[0057] Step S504: Under this cooking state, obtain the air outlet resistance of the range hood;

[0058] Step S506: Adjust the distance between the dynamic noise reduction component and the fan casing based on the air outlet resistance to perform dynamic noise reduction on the range hood.

[0059] In this embodiment of the invention, the range hood is equipped with an infrared detection device. In step S502, when obtaining the cooking status of the range hood, the infrared detection device can detect the cooking status of the corresponding stove. For example, when the stove is cooking, the temperature around it rises. The infrared detection device can detect this temperature rise and send it to the controller. The controller can then determine that the stove is currently cooking, thus determining the range hood's cooking status as "cooking in progress." Conversely, when the stove is not cooking, the infrared detection device will not detect any temperature rise. In this case, the controller will not receive any signal and will determine the cooking status as "not cooking."

[0060] Furthermore, when the range hood is a dual-cavity range hood and the corresponding cooktop is a dual-cooktop, infrared detection equipment can further detect whether both cooktops are on or only one is on, based on temperature changes during cooking. Specifically, the infrared detection equipment can detect the on / off status of the cooktops. If either cooktop is on, the cooking status is determined to be single-cooktop cooking; if both cooktops are on, the cooking status is determined to be dual-cooktop cooking; if neither cooktop is on, the cooking status is determined to be no cooking.

[0061] Once the above cooking state is determined, it means that the range hood has entered a stable working state and noise reduction can be implemented.

[0062] Furthermore, since the range hood in this embodiment of the invention is also equipped with a smoke baffle, when the range hood is turned on, the smoke baffle can also be controlled based on the infrared detection function of the infrared detection device after the range hood is turned on, while identifying the cooking status.

[0063] Specifically, taking a dual-chamber range hood as an example, when both stoves are cooking at the same time, the controller can control the push rod mechanism of the smoke baffles on the left and right sides to operate, so that the smoke baffles on both sides can be opened automatically and fully, and the oil fumes can enter the range hood from the oil mesh on the left and right sides.

[0064] When cooking only on the left burner, the left smoke baffle can be fully opened automatically under the control of the controller, while the right smoke baffle is partially opened to assist in smoke intake. At this time, the negative pressure of the range hood is mainly concentrated on the left oil filter, which reduces the noise energy radiated from the right oil filter inlet.

[0065] When cooking only on the right burner, the right-side baffle automatically opens fully under the control of the controller, while the left-side baffle opens halfway to assist in smoke intake. At this time, the negative pressure of the range hood is mainly concentrated on the right-side oil filter, reducing the noise energy radiated from the left-side oil filter inlet.

[0066] When there is no cooking on the left and right burners, the smoke baffles on both sides are closed, and the controller can shut down the fan system at this time.

[0067] Furthermore, once the baffle plate is adjusted to the correct position according to the cooking status, step S504 can be performed to obtain the air outlet resistance of the range hood.

[0068] In practical use, the exhaust resistance of the range hood mentioned above actually refers to the resistance at the fan outlet. This resistance is generally related to the fan's operating parameters, such as the fan frequency or fan speed. Therefore, when obtaining the exhaust resistance of the range hood, it can be determined based on the fan's operating parameters. Furthermore, considering that most range hoods now have automatic voltage regulation functions, a frequency converter and a frequency converter fan can be installed on the range hood. The frequency converter can collect the real-time operating parameters of the frequency converter fan. Thus, when the exhaust resistance changes, the real-time exhaust resistance value f can be obtained by the difference between the real-time operating parameters and the set operating parameters. By comparing the exhaust resistance f with the preset resistance threshold F0, the real-time operating parameters of the frequency converter fan can be adjusted, thereby regulating the fan speed.

[0069] Specifically, in step S504 above, when obtaining the air outlet resistance f, the operating parameters of the fan in the cooking state can be obtained, such as the fan's operating frequency or speed; the air outlet resistance f corresponding to the operating parameters of the fan at this time can be found in the pre-stored operating parameter lookup table.

[0070] The operating parameter reference table stores the correspondence between the fan's operating parameters and the outlet resistance. In actual use, this operating parameter reference table is generally based on data obtained statistically from the fan's operating conditions under laboratory or testing environments. Furthermore, the resistance threshold is different for different models of fans or hydraulic presses, and can be set according to actual usage conditions. This embodiment of the invention does not impose any limitations on this.

[0071] Furthermore, in step S506 above, when performing dynamic noise reduction based on the outlet resistance f, if the outlet resistance f is greater than the preset resistance threshold F0, the dynamic noise reduction component is driven to move away from the fan casing according to the preset dynamic parameters to increase the distance between the dynamic noise reduction component and the fan casing; if the outlet resistance f is not greater than the resistance threshold F0, the dynamic noise reduction component is driven to move closer to the fan casing according to the preset dynamic parameters to decrease the distance between the dynamic noise reduction component and the fan casing.

[0072] For ease of understanding, the following explanation uses the noise reduction process of a dual-chamber range hood as an example.

[0073] in, Figure 6A schematic diagram of a dynamic noise reduction component rising is shown. Figure 7 A schematic diagram of the dynamic noise reduction component's descent is shown, specifically, Figure 6 The diagram shows the fan outlet 601, fan volute 101, outer casing 602, smoke collection chamber 603, and dynamic noise reduction component 102. Further, in... Figure 7 Except Figure 6 The structure also shows a first guide vane 103 and a second guide vane 104.

[0074] based on Figure 6 and Figure 7 The position of the dynamic noise reduction component 102 shown is shown. Figure 8 A flowchart of another noise reduction control method for range hoods is shown, such as... Figure 8 As shown, the noise reduction process of a dual-chamber range hood includes the following steps:

[0075] Step S802: Turn on the range hood;

[0076] Step S804: The infrared detection device detects the cooking status of the dual-cooker stove.

[0077] Step S806: Cooking only on the left-side stove.

[0078] Step S807: The left smoke baffle is fully opened, and the right smoke baffle is half-opened;

[0079] Step S808: Cooking only on the right-side stove.

[0080] Step S809: The smoke baffle on the right side is fully opened, and the smoke baffle on the left side is half-opened;

[0081] Step S810: Cooking on both sides of the stove simultaneously;

[0082] Step S811: Open both the left and right smoke baffles.

[0083] Step S812, no cooking;

[0084] Step S813: Close both the left and right smoke baffles.

[0085] At this point, the range hood can be turned off.

[0086] Specifically, steps S806 to S813 describe the process by which the controller, based on the infrared detection function of the infrared detection device, controls the smoke baffle after recognizing the cooking status following the start-up of the range hood. Once the smoke baffle is in place, the process of determining the air outlet resistance f, as described in the following steps, is performed.

[0087] Step S814: Determine whether the resistance at the air outlet is greater than a pre-set resistance threshold. If yes, execute Step S816; if no, execute Step S818;

[0088] Step S816: Drive the dynamic noise reduction component to move away from the fan volute according to the preset dynamic parameters, so as to increase the distance between the dynamic noise reduction component and the fan volute;

[0089] Step S818: Drive the dynamic noise reduction component to move closer to the fan volute according to the preset dynamic parameters, so as to reduce the distance between the dynamic noise reduction component and the fan volute.

[0090] Specifically, let f represent the resistance at the air outlet and F0 represent the resistance threshold. The process of Step S816 is actually the case where f > F0. In this case, when the resistance at the air outlet f > F0, the range hood can increase the fan speed through the automatic pressure regulation function. At this time, due to the large exhaust resistance inside the fan, the backflow disorder intensifies, the airflow pulsation increases significantly, and the airflow pulsation noise radiates out through the fan air inlet, propagates downward through the two side cavities, and forms a reverberant sound field under the volute. The two noise sources are superimposed here, the sound energy further increases, and it radiates out through the air inlet of the smoke collecting cavity, and the working noise of the range hood becomes larger. At this time, the dynamic noise reduction component can perform the downward movement of the noise reduction plate through the driving mechanism to reduce the noise in the reverberant area, corresponding to Figure 7 the process.

[0091] Furthermore, the process of Step S818 is actually the case where f < F0. In this case, when the resistance at the air outlet f < F0, the fan speed can be reduced through the automatic pressure regulation function of the range hood. At this time, the airflow in the flow channel is relatively smooth, and the airflow is mainly split to the fan air inlet through the left and right flow guiding plates, and the noise of the range hood is relatively small. At this time, the dynamic noise reduction component can perform the upward movement of the noise reduction plate through the driving mechanism to prevent the airflow from being blocked and affecting the splitting and guiding effect of the flow guiding plate, corresponding to Figure 6 the process.

[0092] Furthermore, during the noise reduction control process, a noise reduction judgment can be performed at a preset time interval, that is, the process of Step S820:

[0093] Step S820: Perform a noise reduction judgment at a preset time interval;

[0094] That is, return to Step S804 to re-determine the cooking state, so as to perform dynamic processing on the noise reduction in a timely manner. At the same time, for the end of cooking, that is, the non-cooking state, it can also be responded to in a timely manner. For example, perform an adaptive noise reduction judgment every 1S, which realizes real-time adaptive noise reduction adjustment of the range hood under different air outlet resistance states and different user cooking scenarios, reduces the working noise, and improves the user experience.

[0095] In summary, the range hood and its noise reduction control method provided in this embodiment of the invention can respond to the start-up operation of the range hood and obtain the cooking state of the range hood; then, in the cooking state, obtain the air outlet resistance f of the range hood; and adjust the distance between the dynamic noise reduction component and the fan volute based on the air outlet resistance f to perform dynamic noise reduction processing on the range hood. Since the dynamic noise reduction component is adjusted based on the air outlet resistance f, the range hood can adaptively adjust the noise reduction in real time for different cooking states under different air outlet resistance states, which not only reduces the operating noise of the range hood, but also helps to improve the user experience and enhance the user's satisfaction.

[0096] Furthermore, this embodiment of the invention also provides a noise reduction control device for a range hood. Specifically, a dynamic noise reduction component is provided below the fan casing of the range hood, and this dynamic noise reduction component is used to perform dynamic noise reduction processing on the range hood; such as Figure 9 A schematic diagram of a noise reduction control device for a range hood is shown. The device includes:

[0097] The first acquisition module 90 is used to respond to the power-on operation of the range hood and acquire the cooking status of the range hood;

[0098] The second acquisition module 92 acquires the air outlet resistance of the range hood during the cooking state.

[0099] The noise reduction module 94 is used to adjust the distance between the dynamic noise reduction component and the fan volute based on the air outlet resistance in order to perform dynamic noise reduction on the range hood.

[0100] The noise reduction control device for a range hood provided in this embodiment of the invention has the same technical features as the noise reduction control method for a range hood provided in the above embodiments, so it can also solve the same technical problems and achieve the same technical effects.

[0101] Furthermore, embodiments of the present invention also provide an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the steps of the above-described method.

[0102] This invention also provides a computer-readable storage medium storing a computer program, which, when run by a processor, executes the steps of the above-described method.

[0103] Furthermore, embodiments of the present invention also provide a schematic diagram of the structure of an electronic device, such as... Figure 10 The diagram shows the structure of the electronic device, which includes a processor 71 and a memory 70. The memory 70 stores computer-executable instructions that can be executed by the processor 71, and the processor 71 executes the computer-executable instructions to implement the above-described method.

[0104] exist Figure 7 In the illustrated embodiment, the electronic device further includes a bus 72 and a communication interface 73, wherein the processor 71, the communication interface 73, and the memory 70 are connected via the bus 72.

[0105] The memory 70 may include high-speed random access memory (RAM) or non-volatile memory, such as at least one disk storage device. Communication between this system network element and at least one other network element is achieved through at least one communication interface 73 (which can be wired or wireless), such as the Internet, wide area network, local area network, or metropolitan area network. The bus 72 may be an ISA (Industry Standard Architecture) bus, a PCI (Peripheral Component Interconnect) bus, or an EISA (Extended Industry Standard Architecture) bus. The bus 72 can be divided into an address bus, a data bus, and a control bus. For ease of representation, Figure 10 The symbol is represented by a single double-headed arrow, but this does not mean that there is only one bus or one type of bus.

[0106] Processor 71 may be an integrated circuit chip with signal processing capabilities. In implementation, each step of the above method can be completed by the integrated logic circuitry in the hardware of processor 71 or by software instructions. The processor 71 can be a general-purpose processor, including a Central Processing Unit (CPU), a Network Processor (NP), etc.; it can also be a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field-Programmable Gate Array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components. The general-purpose processor can be a microprocessor or any conventional processor. The steps of the method disclosed in the embodiments of this invention can be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software modules can reside in random access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, registers, or other mature storage media in the art. The storage medium is located in the memory, and the processor 71 reads the information in the memory and, in conjunction with its hardware, completes the steps of the aforementioned method.

[0107] The computer program product of the range hood and its noise reduction control method provided in the embodiments of the present invention includes a computer-readable storage medium storing program code. The instructions included in the program code can be used to execute the methods in the preceding method embodiments. For specific implementation, please refer to the method embodiments, which will not be repeated here.

[0108] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working process of the device described above can be referred to the corresponding process in the foregoing method embodiments, and will not be repeated here.

[0109] Furthermore, in the description of the embodiments of the present invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the present invention based on the specific circumstances.

[0110] If a function is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this invention, or the part that contributes to the prior art, or a part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods of the various embodiments of this invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0111] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0112] Finally, it should be noted that the above embodiments are merely specific implementations of the present invention, used to illustrate the technical solutions of the present invention, and not to limit it. The scope of protection of the present invention is not limited thereto. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art can still modify or easily conceive of changes to the technical solutions described in the foregoing embodiments within the technical scope disclosed in the present invention, or make equivalent substitutions for some of the technical features; and these modifications, changes, or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be covered within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A noise reduction control method for a range hood, characterized in that, A dynamic noise reduction component is installed below the fan casing of the range hood to perform dynamic noise reduction on the range hood; The method includes: In response to a power-on operation of the range hood, the cooking status of the range hood is obtained; In the cooking state, the air outlet resistance of the range hood is obtained; The distance between the dynamic noise reduction component and the fan casing is adjusted based on the air outlet resistance to perform dynamic noise reduction on the range hood.

2. The method according to claim 1, characterized in that, The range hood is equipped with an infrared detection device; The step of obtaining the cooking status of the range hood includes: The infrared detection device detects the cooking status of the stove corresponding to the range hood.

3. The method according to claim 2, characterized in that, The range hood is a dual-chamber range hood, and the corresponding cooktop is a dual-cooktop. The step of detecting the cooking status of the stove corresponding to the range hood using the infrared detection device includes: The infrared detection device is used to detect whether the range hood and the stove are turned on. If any one of the cookers is turned on, the cooking state is determined to be a single-cooker cooking state. If both of the aforementioned stoves are turned on, then the cooking state is determined to be a dual-stove cooking state; If neither of the two stoves is turned on, the cooking state is determined to be a non-cooking state.

4. The method according to claim 1, characterized in that, The step of obtaining the air outlet resistance of the range hood during the cooking state includes: Obtain the operating parameters of the fan during the cooking process; Find the outlet resistance corresponding to the operating parameters of the fan in the pre-stored operating parameter lookup table; The operating parameter lookup table stores the correspondence between the operating parameters of the fan and the air outlet resistance.

5. The method according to claim 1, characterized in that, The step of adjusting the distance between the dynamic noise reduction component and the fan casing based on the outlet resistance includes: If the air outlet resistance is greater than a preset resistance threshold, the dynamic noise reduction component is driven to move away from the fan casing according to preset dynamic parameters, so as to increase the distance between the dynamic noise reduction component and the fan casing. If the air outlet resistance is not greater than the resistance threshold, the dynamic noise reduction component is driven to move closer to the fan volute according to preset dynamic parameters, so as to reduce the distance between the dynamic noise reduction component and the fan volute.

6. A range hood, characterized in that, It includes a range hood body, a dynamic noise reduction component disposed below the fan casing of the range hood, and a drive mechanism that cooperates with the dynamic noise reduction component; The drive mechanism is connected to the controller of the range hood. The controller is used to execute the method according to any one of claims 1 to 5, adjusting the distance between the dynamic noise reduction component and the fan volute through the drive mechanism to perform dynamic noise reduction processing on the range hood.

7. The range hood according to claim 6, characterized in that, The range hood is also equipped with a first guide plate and a second guide plate; A preset gap is provided between the first guide plate and the second guide plate, and the first guide plate and the second guide plate are symmetrically distributed in a V-shape on both sides of the dynamic noise reduction component; The cavity of the V-shaped structure faces the volute of the fan.

8. The range hood according to claim 6, characterized in that, The dynamic noise reduction component includes a noise reduction board; The drive mechanism works in conjunction with the noise reduction plate to adjust the distance between the noise reduction plate and the fan volute.

9. The range hood according to claim 8, characterized in that, The drive mechanism includes a motor mounting bracket, a motor, a screw, and a slide rail that cooperates with the screw; The motor is mounted on the motor mounting bracket, and the drive end of the motor is connected to the screw. The slide rail is disposed inside the noise reduction plate, and the screw extends into the slide rail; Driven by the controller, the motor rotates the screw, causing the screw to move with the sliding rail, thereby raising or lowering the noise reduction plate to adjust the distance between the noise reduction plate and the fan volute.

10. The range hood according to claim 8, characterized in that, The noise reduction plate has at least one noise reduction hole, and the interior of the noise reduction plate is provided with a sound-absorbing structure.

11. The range hood according to any one of claims 6 to 10, characterized in that, The range hood is a dual-chamber range hood; the corresponding cooktop is a dual-cooktop. The dual-chamber range hood has a smoke collection chamber equipped with a smoke baffle corresponding to each cooktop, and a push rod structure corresponding to each smoke baffle. The controller is also used to control the opening state of the smoke baffle through the push rod structure.

12. The range hood according to claim 11, characterized in that, The range hood also includes an infrared detection device connected to the controller; The detection area of ​​the infrared detection device corresponds to the stove and is used to detect the cooking status of the stove. The controller is also used to control the opening state of the smoke baffle based on the cooking state.

Images