Range hood air duct adapter component, range hood and control method thereof

Abstract

The present invention provides a range hood air duct adapter component, a range hood, and a control method thereof. The range hood air duct adapter component includes a housing, wherein the bottom of the housing is provided with a bottom inlet for connecting to the top of the range hood's smoke collection hood, and the top of the housing is provided with a top outlet for connecting to the range hood's air duct, with a regulating air duct formed between the bottom inlet and the top outlet; the top of the housing side wall is provided with a first upper air valve plate and a second upper air valve plate, the first upper air valve plate and the second upper air valve plate being able to swing between a first position and a second position; the bottom of the housing side wall is provided with a first lower air valve plate and a second lower air valve plate, the first lower air valve plate and the second lower air valve plate being able to swing between a third position, a fourth position, and a fifth position. The present invention can achieve independent smoke collection at the left and right burner positions of the range hood, thereby increasing the effective smoke intake at a single burner position and reducing noise during fan operation.

Description

Technical Field

[0001] The present invention belongs to the technical field of range hoods, and in particular relates to a range hood air duct adapter component, a range hood and a control method thereof. Background Art

[0002] With the prevalence of high-rise residential buildings, resistance in smoke exhaust ducts on lower floors is increasing, while consumers are demanding more effective range hoods for fume removal. Manufacturers are widely using DC motors instead of traditional AC motors in their range hoods, significantly increasing fan speed to overcome resistance in the flue network. However, this has led to increasingly prominent noise issues. Consumers demand products that meet their demands for high air volume and high static pressure, while also offering lower operating noise and more acceptable sound quality. Therefore, manufacturers are focusing on further improving fan pressure head and reducing noise while maintaining the same fan size. Furthermore, existing range hoods present the following issues: While stoves have two burners, users may only use one for cooking. However, the range hood draws in smoke from both burners simultaneously, effectively drawing in only one burner while the other draws in smoke-free air. This poses a risk of smoke leakage when smoke production is high.

[0003] Therefore, it is necessary to provide an improved technical solution to the above-mentioned deficiencies in the prior art. Summary of the Invention

[0004] The purpose of the present invention is to provide a range hood air duct adapter component, which can realize independent smoke collection at the left and right burner positions, increase the effective smoke intake at the burner position on one side, and reduce the noise during fan operation.

[0005] Another object of the present invention is to provide a range hood which, because it includes the above-mentioned range hood air duct adapter component, can reduce the fan speed while ensuring the same amount of smoke, thereby achieving a further noise reduction effect.

[0006] Another object of the present invention is to provide a control method for the above-mentioned range hood, which can control the range hood in different operating modes to achieve sound insulation and noise reduction by adjusting the angle of the air valve plate.

[0007] In order to achieve the above object, the present invention provides the following technical solutions:

[0008] A range hood air duct adapter component comprises a housing, wherein the bottom of the housing is provided with a bottom inlet for connecting to the top of the range hood of the range hood, and the top of the housing is provided with a top outlet for connecting to the air duct of the range hood, wherein a regulating air duct is formed between the bottom inlet and the top outlet;

[0009] A first upper air valve plate and a second upper air valve plate are provided at the top of the side wall of the box body. The first upper air valve plate and the second upper air valve plate are arranged side by side along the width direction of the regulating air duct, and the tops of the first upper air valve plate and the second upper air valve plate are hinged to the side wall of the box body so that the first upper air valve plate and the second upper air valve plate can swing between a first position and a second position in the regulating air duct; and during the swinging process from the first position to the second position, the ventilation area of ​​the regulating air duct gradually decreases;

[0010] The bottom of the side wall of the box body is provided with a first downwind valve plate and a second downwind valve plate corresponding to the first upwind valve plate and the second upwind valve plate, the first downwind valve plate and the second downwind valve plate are arranged side by side along the width direction of the regulating air duct, and the bottoms of the first downwind valve plate and the second downwind valve plate are hinged to the side wall of the box body, so that the first downwind valve plate and the second downwind valve plate can swing between a third position, a fourth position and a fifth position in the regulating air duct; in the process of the first downwind valve plate and the second downwind valve plate swinging to the third position, the fourth position and the fifth position in sequence, the ventilation area of ​​the regulating air duct gradually decreases;

[0011] The first upwind valve plate, the second upwind valve plate, the first downwind valve plate, and the second downwind valve plate are respectively connected to a driving device, and the driving device is connected to a control system.

[0012] According to one embodiment of the present invention, when the first upwind valve plate and the second upwind valve plate are located at the first position, they abut against the side wall of the box body; when the first upwind valve plate and the second upwind valve plate are located at the second position, a first angle is formed between them and the side wall of the box body;

[0013] When the first downwind valve plate and the second downwind valve plate are located in the third position, they are against the side wall of the box body. When the first downwind valve plate and the second downwind valve plate are located in the fourth position, a second angle is formed between them and the side wall of the box body. When the first downwind valve plate and the second downwind valve plate are located in the fifth position, the regulating air duct cross section is closed.

[0014] According to one embodiment of the present invention, the box body is in the shape of a rectangular parallelepiped, the bottom inlet is located at the bottom surface of the box body, the top outlet is located at the top surface of the box body, and the first upwind valve plate, the second upwind valve plate, the first downwind valve plate, and the second downwind valve plate are located on a side wall of the box body.

[0015] According to one embodiment of the present invention, an inclined baffle is provided in the box body, and the baffle is located at the edges of the bottom inlet and the top outlet, so that the cross-sectional area of ​​the regulating air duct gradually increases from the bottom inlet to the top outlet.

[0016] According to one embodiment of the present invention, the second angle is smaller than or equal to the angle between the baffle and the vertical direction.

[0017] According to one embodiment of the present invention, the ends of the first upwind valve plate and the second upwind valve plate are provided with a first limiting flange, and the ends of the first downwind valve plate and the second downwind valve plate are provided with a second limiting flange corresponding to the first limiting flange.

[0018] The present invention also provides a range hood, comprising the above-mentioned range hood air duct adapter component, as well as a smoke collection hood, an air duct and a bellows; the bottom inlet of the air duct adapter component is connected to the top of the smoke collection hood, and the top outlet of the air duct adapter component is connected to the bottom of the air duct; the top of the air duct is connected to the bottom of the bellows.

[0019] According to one embodiment of the present invention, a vertical fan is provided inside the wind box, and a smoke exhaust port is provided on the side of the wind box.

[0020] According to one embodiment of the present invention, the smoke collecting hood is provided with a smoke collecting flap, and the smoke collecting flap is provided with two microphones.

[0021] The present invention also provides a control method for the above-mentioned range hood, wherein the range hood has a two-side smoking mode, a two-side smoking noise reduction mode, a left-side smoking noise reduction mode, and a right-side smoking noise reduction mode; the fan of the range hood has a first gear, a second gear, a third gear, and a fourth gear of speed from low to high;

[0022] When the range hood is operated in the two-side smoking mode, the first upper air valve plate and the second upper air valve plate are located in the first position, and the first lower air valve plate and the second lower air valve plate are located in the third position; when the range hood is operated in the two-side smoking noise reduction mode, the first upper air valve plate and the second upper air valve plate are located in the second position, and the first lower air valve plate and the second lower air valve plate are located in the fourth position; when the range hood is operated in the left-side smoking noise reduction mode, the first upper air valve plate and the second upper air valve plate are located in the first position, the first lower air valve plate is located in the third position, and the second lower air valve plate is located in the fifth position; when the range hood is operated in the right-side smoking noise reduction mode, the first upper air valve plate and the second upper air valve plate are located in the first position, the second lower air valve plate is located in the third position, and the first lower air valve plate is located in the fifth position;

[0023] The control method includes the following steps: a user turns on the range hood and selects a gear, and according to different gears, the range hood is controlled to operate in one of the two-side smoking mode, the two-side smoking noise reduction mode, the left-side smoking noise reduction mode, and the right-side smoking noise reduction mode, and at the same time, the fan operates in one of the first gear, the second gear, the third gear, and the fourth gear.

[0024] According to one embodiment of the present invention, the user selects the silent gear, the control system controls the range hood to operate in the two-side smoking noise reduction mode, and the fan operates in the first gear; or

[0025] The user selects the stir-fry gear, and the control system controls the range hood to operate in the two-side smoking mode, and the fan to operate in the fourth gear; or

[0026] The user selects the automatic gear, and the control system controls the range hood to operate in the two-side smoking and noise reduction mode, and the fan operates in the first gear.

[0027] According to one embodiment of the present invention, when the user selects the automatic mode, the sound signal below the smoke collecting flap is collected by microphones corresponding to the two burners on the range hood; the two microphones are respectively a left microphone and a right microphone;

[0028] When the difference between the noise value detected by the left microphone and the average sound pressure level is greater than a first threshold, and the difference between the noise value detected by the right microphone and the average sound pressure level is greater than the first threshold, the control system controls the range hood to operate in the two-side smoking mode, and the fan to operate in the second gear; when the difference between the noise value detected by the left microphone and the average sound pressure level is greater than a second threshold, and the difference between the noise value detected by the right microphone and the average sound pressure level is greater than the second threshold, the control system controls the range hood to operate in the two-side smoking mode, and the fan to operate in the third gear; when the difference between the noise value detected by the left microphone and the average sound pressure level is greater than a third threshold, and the difference between the noise value detected by the left microphone and the noise value detected by the right microphone is greater than a fourth threshold, the control system controls the range hood to operate in the left-side smoking noise reduction mode, and the fan to operate in the fourth gear; when the difference between the noise value detected by the right microphone and the average sound pressure level is greater than the third threshold, and the difference between the noise value detected by the right microphone and the noise value detected by the left microphone is greater than the fourth threshold, the control system controls the range hood to operate in the right-side smoking noise reduction mode, and the fan to operate in the fourth gear.

[0029] Compared with the prior art, the advantages and beneficial effects of the embodiments of the present invention are:

[0030] The range hood air duct adapter component, the range hood and the control method thereof provided by the embodiment of the present invention can independently control the amount of smoke intake on the left and right sides by means of four air valve plates arranged in the air duct adapter component on the upper side of the smoke hood. In different operating modes, the noise sound waves of the fan can be reflected by adjusting the angle of the air valve plates, thereby reducing the fan noise heard by the user. In addition, the split-type range hood provided by the present invention has a bellows and an internal fan that is partially installed on the ceiling and partially installed inside the cabinet. The bellows and the smoke hood are connected by a retractable smoke pipe, which places the noise source upward and away from the user, thereby improving the kitchen sound environment. In addition, the bellows and the internal centrifugal fan are installed vertically, which is convenient for inserting into the ceiling keel for easy installation, and the vertical fan is more convenient for cleaning. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The accompanying drawings, which constitute part of the present invention, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an undue limitation of the present invention. Among them:

[0032] Figure 1 A schematic structural diagram of a range hood air duct adapter component provided by an embodiment of the present invention;

[0033] Figure 2 A three-dimensional diagram of a range hood air duct adapter component provided by an embodiment of the present invention;

[0034] Figure 3 Schematic diagram of the range hood air duct adapter component provided by an embodiment of the present invention, when the first upper air valve plate and the second upper air valve plate are in the first position and the second position, and the first lower air valve plate and the second lower air valve plate are in the third position, the fourth position, and the fifth position;

[0035] Figure 4 A schematic diagram of the structure of the range hood air duct adapter component in the two-side smoking mode provided by an embodiment of the present invention;

[0036] Figure 5 A cross-sectional view of the range hood air duct adapter component provided by an embodiment of the present invention in a two-side smoking mode;

[0037] Figure 6 A schematic diagram of the structure of the range hood air duct adapter component provided by an embodiment of the present invention in a two-side smoking noise reduction mode;

[0038] Figure 7 A cross-sectional view of the range hood air duct adapter component provided by an embodiment of the present invention in a two-side smoking noise reduction mode;

[0039] Figure 8 A schematic structural diagram of the range hood air duct adapter component in the left-side smoking noise reduction mode provided by an embodiment of the present invention;

[0040] Figure 9 A cross-sectional view of the range hood air duct adapter component provided by an embodiment of the present invention in the left-side smoking noise reduction mode;

[0041] Figure 10 A schematic structural diagram of the range hood air duct adapter component provided by an embodiment of the present invention in the right-side smoking noise reduction mode;

[0042] Figure 11 A cross-sectional view of the range hood air duct adapter component provided by an embodiment of the present invention in the right-side smoking noise reduction mode;

[0043] Figure 12 This is a structural schematic diagram of a range hood provided by an embodiment of the present invention.

[0044] Description of reference numerals:

[0045] 1. Box body; 11. First upwind valve plate; 12. Second upwind valve plate; 13. First downwind valve plate; 14. Second downwind valve plate; 15. Bottom inlet; 16. Top outlet; 17. Adjusting air duct; 18. Baffle; 2. Smoke hood; 21. Smoke collecting flap; 22. Microphone; 3. Air duct; 4. Bellows; 41. Smoke exhaust port; C1. First position; C2. Second position; C3. Third position; C4. Fourth position; C5. Fifth position. DETAILED DESCRIPTION

[0046] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments. Each example is provided by way of explanation of the present invention and is not intended to limit the present invention. Indeed, it will be apparent to those skilled in the art that modifications and variations may be made in the present invention without departing from the scope or spirit of the present invention. For example, a feature shown or described as part of one embodiment may be used in another embodiment to produce yet another embodiment. Therefore, it is intended that the present invention encompasses such modifications and variations as come within the scope of the appended claims and their equivalents.

[0047] In the description of the present invention, the words "first", "second" and similar terms do not indicate any order, quantity or importance, but are only used to distinguish different components. The words "include" or "comprises" and similar terms mean that the element or object preceding the word includes the elements or objects listed after the word and their equivalents, but does not exclude other elements or objects. The directions or positions indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom" and the like are based on the directions or positions shown in the accompanying drawings. They are only for the convenience of describing the present invention and do not require that the present invention must be constructed and operated in a specific orientation. Therefore, they should not be understood as limiting the present invention. The terms "connected", "connected" and "disposed" used in the present invention should be understood in a broad sense. For example, they can mean fixed connection or detachable connection; direct connection or indirect connection through an intermediate component; wired electrical connection, radio connection or wireless communication signal connection. For those skilled in the art, the specific meanings of the above terms can be understood according to the specific circumstances.

[0048] like Figure 1 As shown, an embodiment of the present invention provides a range hood air duct adapter component, including a box body 1, a bottom inlet 15 is provided at the bottom of the box body 1 for connecting to the top of the smoke hood 2 of the range hood, and a top outlet 16 is provided at the top of the box body 1 for connecting to the air duct 3 of the range hood, and an adjusting air duct 17 is formed between the bottom inlet 11 and the top outlet 12.

[0049] like Figure 2 、 Figure 3 As shown, a first upper air valve plate 11 and a second upper air valve plate 12 are provided at the top of the side wall of the housing 1. The first upper air valve plate 11 and the second upper air valve plate 12 are arranged side by side along the width direction of the regulating air duct 17, and the tops of the first upper air valve plate 11 and the second upper air valve plate 12 are hinged to the side wall of the housing 1, so that the first upper air valve plate 11 and the second upper air valve plate 12 can swing between a first position C1 and a second position C2 within the regulating air duct 17, and during the swinging process from the first position to the second position, the ventilation area of ​​the regulating air duct 17 gradually decreases. Specifically, when the first upper air valve plate 11 and the second upper air valve plate 12 are in the first position C1, they abut against the side wall of the housing 1. When the first upper air valve plate 11 and the second upper air valve plate 12 are in the second position C2, a first angle is formed between them and the side wall of the housing 1.

[0050] like Figure 2 、 Figure 3As shown, a first downwind valve plate 13 and a second downwind valve plate 14 are provided at the bottom of the side wall of the housing 1, corresponding to the first upwind valve plate 11 and the second upwind valve plate 12. The first downwind valve plate 13 and the second downwind valve plate 14 are arranged side by side along the width direction of the regulating air duct 17. The bottoms of the first downwind valve plate 13 and the second downwind valve plate 14 are hinged to the side wall of the housing 1, so that the first downwind valve plate 13 and the second downwind valve plate 14 can swing between a third position C3, a fourth position C4 and a fifth position C5 within the regulating air duct 17. As the first downwind valve plate 13 and the second downwind valve plate 14 swing to the third position, the fourth position and the fifth position, the ventilation area of ​​the regulating air duct 17 gradually decreases. Specifically, when the first downwind damper plate 13 and the second downwind damper plate 14 are located at the third position C3, they abut against the side wall of the housing 1. When the first downwind damper plate 13 and the second downwind damper plate 14 are located at the fourth position C4, a second angle is formed between the first downwind damper plate 13 and the side wall of the housing 1. When the first downwind damper plate 13 and the second downwind damper plate 14 are located at the fifth position C5, the cross section of the regulating air duct 17 is closed.

[0051] like Figure 1 As shown by the upward arrow in the middle, the flow path of the smoke is as follows: the airflow enters the smoke collecting chamber of the smoke collecting hood 2 from the smoke collecting flap 21 of the smoke collecting hood 2, enters the air duct 3 of the range hood through the range hood air duct adapter component of the present invention, and then enters the bellows provided with the fan, and is discharged to the public flue through the smoke exhaust port of the bellows.

[0052] During the flow of smoke, by controlling the positions of the first upper air valve plate 11, the second upper air valve plate 12, the first lower air valve plate 13, and the second lower air valve plate 14 within the range hood air duct adapter component of the embodiment of the present invention, the amount of smoke from the left and right sides of the smoke collecting opening of the smoke hood 2 (corresponding to the left and right burners of the stove) can be controlled. In addition, when the first upper air valve plate 11 and the second upper air valve plate 12 are in the second position C2, and when the first lower air valve plate 13 and the second lower air valve plate 14 are in the fourth position C4 and the fifth position C5, the top surfaces of the first upper air valve plate 11, the second upper air valve plate 12, the first lower air valve plate 13, and the second lower air valve plate 14 form a sound wave reflection surface, reflecting the noise from the air duct 3 (emitted by the fan) back to the air duct 3.

[0053] Therefore, the range hood air duct adapter component of the embodiment of the present invention can provide four working modes:

[0054] (1) Two-side smoking mode: Figure 4 、 Figure 5 As shown, the first upwind damper plate 11 and the second upwind damper plate 12 are located in the first position C1, and the first downwind damper plate 13 and the second downwind damper plate 14 are located in the third position C3. At this point, the cross-sectional area of ​​the regulating air duct 17 is maximized, thereby providing the maximum amount of smoke, and smoke is drawn from both sides of the smoke collecting opening of the smoke collecting hood 2.

[0055] (2) Two-side smoking noise reduction mode (smoking on both sides and noise reduction): Figure 6 、 Figure 7 As shown, the first upwind damper plate 11 and the second upwind damper plate 12 are located at the second position C2, and the first downwind damper plate 13 and the second downwind damper plate 14 are located at the fourth position C4. At this time, the smoke passes through the first downwind damper plate 13 and the second downwind damper plate 14, but the cross-sectional area does not change significantly, and the air duct resistance is not increased. The amount of smoke can be guaranteed, and smoke can be collected on both sides of the smoke collection port of the smoke hood 2. At this time, the noise generated by the fan is transmitted from top to bottom (such as Figure 1 As indicated by the downward arrow in the middle, the propagation of sound waves is in the opposite direction of smoke flow. As sound waves radiate downward from top to bottom, they are partially blocked by the first and second upwind damper plates 11, 12 in the second position C2, and are reflected and dissipated multiple times. This achieves noise reduction while ensuring smoke intake.

[0056] (3) Left side smoking noise reduction mode: Figure 8 、 Figure 9 As shown, the first upwind damper plate 11 and the second upwind damper plate 12 are in the first position C1, the first downwind damper plate 13 is in the third position C3, and the second downwind damper plate 14 is in the fifth position C5. At this time, due to the obstruction of the second downwind damper plate 14, smoke only passes through the left air duct, that is, smoke is only drawn from the left side of the smoke collection port of the smoke hood 2. At the same time, the noise radiated by the fan is blocked and reflected by the second downwind damper plate 14, thereby achieving a sound insulation and noise reduction effect.

[0057] (4) Right side smoking noise reduction mode: Figure 10 、 Figure 11 As shown, the first upwind damper plate 11 and the second upwind damper plate 12 are in the first position C1, the second downwind damper plate 14 is in the third position C3, and the first downwind damper plate 13 is in the fifth position C5. At this time, due to the obstruction of the first downwind damper plate 13, smoke only passes through the right air duct, that is, smoke is only drawn to the right side of the smoke collection port of the smoke hood 2. At the same time, the noise radiated by the fan is blocked and reflected by the first downwind damper plate 13, thereby achieving a sound insulation and noise reduction effect.

[0058] In each of the above modes, in order to control the positions of the first upwind valve plate 11, the second upwind valve plate 12, the first downwind valve plate 13, and the second downwind valve plate 14, they can be connected to a drive device respectively, and the drive device is connected to a control system. The drive device can be a motor connected to the rotating shaft of the first upwind valve plate 11, the second upwind valve plate 12, the first downwind valve plate 13, and the second downwind valve plate 14.

[0059] In one embodiment of the present invention, the box body 1 is in the shape of a rectangular parallelepiped, the bottom inlet 15 is located on the bottom surface of the box body 1, the top outlet 16 is located on the top surface of the box body 1, and the first upwind valve plate 11, the second upwind valve plate 12, the first downwind valve plate 13, and the second downwind valve plate 14 are located on a side wall of the box body 1.

[0060] Furthermore, an inclined baffle 18 is provided within the housing 1, located at the edges of the bottom inlet 15 and the top outlet 16, such that the cross-sectional area of ​​the regulating air duct 17 gradually increases from the bottom inlet 15 to the top outlet 16. This ensures that the cross-sectional area of ​​the regulating air duct 17 is minimized when the first upwind valve plate 11 and the second upwind valve plate 12 are in the second position C2 and the first downwind valve plate 13 and the second downwind valve plate 14 are in the fourth position C4. Specifically, the second angle is less than or equal to the angle between the baffle 18 and the vertical direction, which also ensures that the cross-sectional area of ​​the regulating air duct 17 is minimized when the first upwind valve plate 11 and the second upwind valve plate 12 are in the second position C2 and the first downwind valve plate 13 and the second downwind valve plate 14 are in the fourth position C4.

[0061] In one embodiment of the present invention, the ends of the first upwind valve plate 11 and the second upwind valve plate 12 are provided with a first limiting flange, and the ends of the first downwind valve plate 13 and the second downwind valve plate 14 are provided with a second limiting flange corresponding to the first limiting flange, so that when the first upwind valve plate 11 and the second upwind valve plate 12 are located in the second position C2 and the first downwind valve plate 13 and the second downwind valve plate 14 are located in the fourth position C4, the second limiting flange is against the inner side of the first limiting flange to maintain the stability of the position.

[0062] The present invention also provides a range hood comprising the above-mentioned range hood air duct adapter component. Figure 12 As shown, in a preferred embodiment of the present invention, the range hood is a split-type range hood, comprising a fume hood 2, an air duct 3, and a bellows 4. The bottom inlet 15 of the air duct adapter is connected to the top of the fume hood 2, and the top outlet 16 of the air duct adapter is connected to the bottom of the air duct 3. The top of the air duct 3 is connected to the bottom of the bellows 4. Furthermore, a vertical fan is installed within the bellows 4, and a smoke exhaust port 41 is provided on the side of the bellows 4.

[0063] In the range hood provided by the present invention, the bellows 4 can be partially mounted on the ceiling and partially inside the cabinet, thus positioning the noise source upward and away from the user, thereby improving the kitchen acoustic environment. Furthermore, the bellows 4 is installed vertically with the internal centrifugal fan (with the fan's rotating shaft horizontal), making it easier to insert it into the ceiling keel for installation. Furthermore, after installation and use for a period of time, the vertical fan is easier to clean, as oil stains can accumulate below the fan and can then be cleaned there.

[0064] In a preferred embodiment of the present invention, the air duct 3 is a telescopic air duct to adapt to different installation heights of the bellows 4.

[0065] In one embodiment of the present invention, the smoke hood 2 is provided with a smoke trap flap 21, which is equipped with two microphones 22, one for each of the two burners of the stove. The two microphones 22 can detect the volume of the user's cooking voice to determine the amount of oil smoke and then adopt the corresponding operating mode.

[0066] The present invention also provides a control method for the aforementioned range hood, wherein the range hood has a double-sided smoking mode, a double-sided smoking noise reduction mode, a left-side smoking noise reduction mode, and a right-side smoking noise reduction mode. The range hood has a fan with a first speed, a second speed, a third speed, and a fourth speed, which rotate from low to high.

[0067] When the range hood operates in the double-sided smoking mode, the first upwind damper plate 11 and the second upwind damper plate 12 are located in the first position C1, and the first downwind damper plate 13 and the second downwind damper plate 14 are located in the third position C3. When the range hood operates in the double-sided smoking noise reduction mode, the first upwind damper plate 11 and the second upwind damper plate 12 are located in the second position C2, and the first downwind damper plate 13 and the second downwind damper plate 14 are located in the fourth position C4. When the range hood operates in the left-sided smoking noise reduction mode, the first upwind damper plate 11 and the second upwind damper plate 12 are located in the first position C1, the first downwind damper plate 13 is located in the third position C3, and the second downwind damper plate 14 is located in the fifth position C5. When the range hood operates in the right-side smoking noise reduction mode, the first upwind valve plate 11 and the second upwind valve plate 12 are located at the first position C1, the second downwind valve plate 14 is located at the third position C3, and the first downwind valve plate 13 is located at the fifth position C5.

[0068] The control method includes the following steps: a user turns on the range hood and selects a gear, and according to different gears, the range hood is controlled to operate in one of the two-side smoking mode, the two-side smoking noise reduction mode, the left-side smoking noise reduction mode, and the right-side smoking noise reduction mode, and at the same time, the fan operates in one of the first gear, the second gear, the third gear, and the fourth gear.

[0069] Specifically, when the user selects the silent mode, the control system controls the range hood to operate in the two-side smoking noise reduction mode, and the fan operates in the first gear; or when the user selects the stir-fry mode, the control system controls the range hood to operate in the two-side smoking noise reduction mode, and the fan operates in the fourth gear; or when the user selects the automatic mode, the control system controls the range hood to operate in the two-side smoking noise reduction mode, and the fan operates in the first gear.

[0070] When the user selects the automatic mode, the smoke collecting flap 21 of the range hood is provided with microphones 22 corresponding to the two burners, namely the left microphone and the right microphone. The two microphones collect the sound signal below the smoke collecting flap 21 to obtain the average sound pressure level (i.e. the size of the sound signal below the smoke collecting flap). The two microphones monitor the sound signal of the sound source directly below and filter the ambient noise. During the test, after the connection test is carried out for 30 seconds to obtain a stable sound signal, the average sound pressure level is obtained. The ambient sound signal is collected once every one hour, and the left and right microphones are tested alternately.

[0071] When the difference between the noise value detected by the left microphone and the average sound pressure level is greater than the first threshold, and the difference between the noise value detected by the right microphone and the average sound pressure level is greater than the first threshold, the control system controls the range hood to operate in the two-sided smoking mode, and the fan to operate in the second gear; when the difference between the noise value detected by the left microphone and the average sound pressure level is greater than the second threshold, and the difference between the noise value detected by the right microphone and the average sound pressure level is greater than the second threshold, the control system controls the range hood to operate in the two-sided smoking mode, and the fan to operate in the third gear; when the difference between the noise value detected by the left microphone and the average sound pressure level is greater than the third threshold, and the difference between the noise value detected by the left microphone and the noise value detected by the right microphone is greater than the fourth threshold, the control system controls the range hood to operate in the left-side smoking noise reduction mode, and the fan to operate in the fourth gear; when the difference between the noise value detected by the right microphone and the average sound pressure level is greater than the third threshold, and the difference between the noise value detected by the right microphone and the noise value detected by the left microphone is greater than the fourth threshold, the control system controls the range hood to operate in the right-side smoking noise reduction mode, and the fan to operate in the fourth gear.

[0072] When the user selects the automatic mode, the control logic of the air damper plate position is: the user's cooking intensity and the equivalent amount of oil smoke are judged by the sound pressure level of the sound signal collected by the directional microphone, so as to set the corresponding air damper plate position to meet the mute and smoke exhaust requirements of different cooking programs. Among them, the value ranges of the first threshold, the second threshold, the third threshold, and the fourth threshold can be: the first threshold ∈ [3, 6], the second threshold ∈ (6, 10], the third threshold ∈ (10, 15], and the fourth threshold ∈ (3, 8].

[0073] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A range hood air duct adapter component, characterized in that: The invention comprises a box body (1), wherein the bottom of the box body (1) is provided with a bottom inlet (15) for connecting to the top of the smoke collecting hood (2) of the range hood, and the top of the box body (1) is provided with a top outlet (16) for connecting to the air duct (3) of the range hood, and an adjusting air duct (17) is formed between the bottom inlet (15) and the top outlet (16); A first upper air valve plate (11) and a second upper air valve plate (12) are provided at the top of the side wall of the box body (1), and the first upper air valve plate (11) and the second upper air valve plate (12) are arranged side by side along the width direction of the regulating air duct (17), and the tops of the first upper air valve plate (11) and the second upper air valve plate (12) are hinged to the top of the side wall of the box body (1), so that the first upper air valve plate (11) and the second upper air valve plate (12) can swing between a first position and a second position in the regulating air duct (17), and during the swinging process from the first position to the second position, the ventilation area of ​​the regulating air duct (17) gradually decreases; The bottom of the side wall of the box body (1) is provided with a first downwind valve plate (13) and a second downwind valve plate (14) corresponding to the first upwind valve plate (11) and the second upwind valve plate (12), and the first downwind valve plate (13) and the second downwind valve plate (14) are arranged side by side along the width direction of the regulating air duct (17), and the bottoms of the first downwind valve plate (13) and the second downwind valve plate (14) are hinged to the side wall of the box body (1), so that the first downwind valve plate (13) and the second downwind valve plate (14) can swing between a third position, a fourth position and a fifth position in the regulating air duct (17); in the process of the first downwind valve plate (13) and the second downwind valve plate (14) swinging to the third position, the fourth position and the fifth position in sequence, the ventilation area of ​​the regulating air duct (17) gradually decreases; The first upwind valve plate (11), the second upwind valve plate (12), the first downwind valve plate (13), and the second downwind valve plate (14) are respectively connected to a driving device, and the driving device is connected to a control system.

2. The range hood air duct adapter according to claim 1, characterized in that: When the first upwind valve plate (11) and the second upwind valve plate (12) are located at the first position, they abut against the side wall of the box body (1); when the first upwind valve plate (11) and the second upwind valve plate (12) are located at the second position, a first angle is formed between them and the side wall of the box body (1); When the first downwind valve plate (13) and the second downwind valve plate (14) are located at the third position, they abut against the side wall of the box body (1); when the first downwind valve plate (13) and the second downwind valve plate (14) are located at the fourth position, a second angle is formed between the first downwind valve plate (13) and the second downwind valve plate (14) and the side wall of the box body (1); when the first downwind valve plate (13) and the second downwind valve plate (14) are located at the fifth position, the cross section of the regulating air duct (17) is closed.

3. The range hood air duct adapter according to claim 2, characterized in that: The box body (1) is in the shape of a rectangular parallelepiped, the bottom inlet (15) is located on the bottom surface of the box body (1), the top outlet (16) is located on the top surface of the box body (1), and the first upwind valve plate (11), the second upwind valve plate (12), the first downwind valve plate (13), and the second downwind valve plate (14) are located on a side wall of the box body (1).

4. The range hood air duct adapter according to claim 3, characterized in that: An inclined baffle (18) is provided in the box body (1), and the baffle (18) is located at the edges of the bottom inlet (15) and the top outlet (16), so that the cross-sectional area of ​​the regulating air duct (17) gradually increases from the bottom inlet (15) to the top outlet (16).

5. The range hood air duct adapter component according to claim 4, characterized in that: The second angle is smaller than or equal to the angle between the baffle (18) and the vertical direction.

6. The range hood air duct adapter component according to claim 1 or 2, characterized in that: The ends of the first upwind valve plate (11) and the second upwind valve plate (12) are provided with a first limiting flange, and the ends of the first downwind valve plate (13) and the second downwind valve plate (14) are provided with a second limiting flange corresponding to the first limiting flange.

7. A range hood, characterized in that: The range hood comprises an air duct adapter component according to any one of claims 1 to 6, a fume hood (2), an air duct (3) and a bellows (4); the bottom inlet (15) of the air duct adapter component is connected to the top of the fume hood (2), the top outlet (16) of the air duct adapter component is connected to the bottom of the air duct (3); and the top of the air duct (3) is connected to the bottom of the bellows (4).

8. The range hood according to claim 7, characterized in that: A vertical fan is provided inside the wind box (4), and a smoke exhaust port (41) is provided on the side of the wind box (4).

9. The range hood according to claim 7 or 8, characterized in that: The smoke collecting hood (2) is provided with a smoke collecting flap (21), and the smoke collecting flap (21) is provided with two microphones (22).

10. A control method for a range hood according to any one of claims 7 to 9, characterized in that: The range hood has a two-side smoking mode, a two-side smoking noise reduction mode, a left-side smoking noise reduction mode, and a right-side smoking noise reduction mode; the fan of the range hood has a first gear, a second gear, a third gear, and a fourth gear of rotation speed from low to high; When the range hood is operated in the two-side smoking mode, the first upwind valve plate (11) and the second upwind valve plate (12) are located in the first position, and the first downwind valve plate (13) and the second downwind valve plate (14) are located in the third position; when the range hood is operated in the two-side smoking noise reduction mode, the first upwind valve plate (11) and the second upwind valve plate (12) are located in the second position, and the first downwind valve plate (13) and the second downwind valve plate (14) are located in the fourth position; when the range hood is operated in the left-side smoking noise reduction mode, the first upwind valve plate (11) and the second upwind valve plate (12) are located in the first position, the first downwind valve plate (13) is located in the third position, and the second downwind valve plate (14) is located in the fifth position; when the range hood is operated in the right-side smoking noise reduction mode, the first upwind valve plate (11) and the second upwind valve plate (12) are located in the first position, the second downwind valve plate (14) is located in the third position, and the first downwind valve plate (13) is located in the fifth position; The control method includes the following steps: a user turns on the range hood and selects a gear, and according to different gears, the range hood is controlled to operate in one of the two-side smoking mode, the two-side smoking noise reduction mode, the left-side smoking noise reduction mode, and the right-side smoking noise reduction mode, and at the same time, the fan operates in one of the first gear, the second gear, the third gear, and the fourth gear.

11. The range hood control method according to claim 10, characterized in that: The user selects the silent mode, the control system controls the range hood to operate in the two-side smoking noise reduction mode, and the fan operates in the first mode; or The user selects the stir-fry gear, and the control system controls the range hood to operate in the two-side smoking mode, and the fan to operate in the fourth gear; or The user selects the automatic gear, and the control system controls the range hood to operate in the two-side smoking and noise reduction mode, and the fan operates in the first gear.

12. The range hood control method according to claim 11, characterized in that: When the user selects the automatic mode, the microphones corresponding to the two burners on the smoke collecting flap of the range hood are used to collect the sound signal below the smoke collecting flap to obtain the average sound pressure level; the two microphones are respectively the left microphone and the right microphone. When the difference between the noise value detected by the left microphone and the average sound pressure level is greater than a first threshold, and the difference between the noise value detected by the right microphone and the average sound pressure level is greater than the first threshold, the control system controls the range hood to operate in the two-side smoking mode, and the fan to operate in the second gear; when the difference between the noise value detected by the left microphone and the average sound pressure level is greater than a second threshold, and the difference between the noise value detected by the right microphone and the average sound pressure level is greater than the second threshold, the control system controls the range hood to operate in the two-side smoking mode, and the fan to operate in the third gear; when the difference between the noise value detected by the left microphone and the average sound pressure level is greater than a third threshold, and the difference between the noise value detected by the left microphone and the noise value detected by the right microphone is greater than a fourth threshold, the control system controls the range hood to operate in the left-side smoking noise reduction mode, and the fan to operate in the fourth gear; When the difference between the noise value detected by the right microphone and the average sound pressure level is greater than the third threshold, and the difference between the noise value detected by the right microphone and the noise value detected by the left microphone is greater than the fourth threshold, the control system controls the range hood to operate in the right-side smoking noise reduction mode, and the fan operates at the fourth gear.

Images