Range hood and control method

Abstract

The invention provides a range hood and a control method, the range hood comprises a shell, the shell is provided with a front panel facing a cooking bench area, a first mounting plate and a second mounting plate, and the front panel, the first mounting plate and the second mounting plate all extend along a preset track; the first mounting plate, the front panel and the second mounting plate are sequentially arranged in the width direction of the shell, and the first mounting plate and the second mounting plate are located on the two sides of the front panel respectively. An air inlet is formed in the front panel; the first phase control array device and the second phase control array device are arranged on the first mounting plate and the second mounting plate respectively, and the first phase control array device and the second phase control array device are used for transmitting ultrasonic waves to the cooking bench area. The range hood provided by the invention solves the technical problem that the appearance and the internal structure of the range hood in the prior art are complicated due to a pneumatic structure or an air curtain device for restraining the spreading of oil smoke.

Description

Technical Field

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

[0002] A range hood is an appliance used in a home kitchen to remove fumes and other substances generated during cooking. It can not only effectively complete its function, but also integrate into the decorative style of modern kitchens. Range hoods in the prior art usually adopt the following settings to improve the suction effect, reduce the spread of fumes, and facilitate the cleaning of oil stains: 1. Set up pneumatic structures such as protrusions and partitions on the edge of the range hood to guide or restrict the spread of oil smoke; 2. Set up a jet curtain at the edge of the range hood to guide or restrict the spread of oil smoke; 3. Equipped with a self-cleaning system to automatically clean the oil stains on the surface of related parts.

[0003] However, the above devices still have some problems in daily use. For example, the raised pneumatic structure is easily bumped and the outer surface increases the workload of cleaning; the design of partitions and jet curtains requires additional air ducts or moving parts, resulting in more space being occupied; the self-cleaning system cannot simultaneously clean the oil stains on the surface of the stove.

[0004] Therefore, the prior art needs to be further developed. Summary of the invention

[0005] The purpose of the present invention is to overcome the above technical deficiencies and provide a range hood and a control method to solve the technical problem of the complicated appearance and internal structure caused by the pneumatic structure or air curtain device used to restrict the spread of oil smoke in the range hood in the prior art.

[0006] To achieve the above technical objectives, according to one aspect of the present invention: a range hood is provided, comprising: a shell, the shell having a front panel, a first mounting plate and a second mounting plate facing a stove area, the front panel, the first mounting plate and the second mounting plate all extending along a preset trajectory; the first mounting plate, the front panel and the second mounting plate are arranged in sequence along the width direction of the shell, and the first mounting plate and the second mounting plate are respectively located on both sides of the front panel; an air inlet is provided on the front panel; a first phased array device and a second phased array device, the first phased array device and the second phased array device are respectively arranged on the first mounting plate and the second mounting plate, the first phased array device and the second phased array device are used to emit ultrasonic waves to the stove area; wherein, when the range hood turns on the smoking mode, the ultrasonic waves emitted by at least part of the first phased array device and at least part of the second phased array device and the negative pressure formed at the air inlet limit the diffusion of oil fume particles.

[0007] Furthermore, the first phased array device includes: at least two first transmitting units, at least two first transmitting units are arranged on the first mounting plate at intervals along the width direction of the shell; each first transmitting unit is used to transmit ultrasonic waves to the stove area, and the transmitting direction of each first transmitting unit is vertically downward; wherein the first transmitting unit includes at least one first transmitter.

[0008] Furthermore, the second phased array device includes: at least two second transmitting units, at least two second transmitting units are arranged on the second mounting plate at intervals along the width direction of the shell; each second transmitting unit is used to transmit ultrasonic waves to the stove area, and the transmitting direction of each second transmitting unit is vertically downward; wherein the second transmitting unit includes at least one second transmitter.

[0009] Furthermore, the shell also includes: a third mounting plate, the third mounting plate is located above the front panel, and the third mounting plate extends along the width direction of the shell; one side of the third mounting plate is respectively connected to the first mounting plate and the second mounting plate, and the other side of the third mounting plate is protruded from the first mounting plate and the second mounting plate; the mounting surface of the third mounting plate is set toward the stove area; the range hood also includes: a third phased array device, the third phased array device is set on the mounting surface of the third mounting plate, and the third phased array device is used to emit ultrasonic waves to the stove area; wherein, when the range hood turns on the smoking mode and the third phased array device is turned on, the third phased array device guides the oil fume particles to move toward the air inlet by periodically adjusting the phase difference of the ultrasonic wave.

[0010] Further, the third phased array device includes: at least two third transmitting units, at least two third transmitting units are arranged on the mounting surface of the third mounting plate at intervals along the direction from the side of the third mounting plate close to the first mounting plate to the side of the third mounting plate away from the first mounting plate; each third transmitting unit is used to transmit ultrasonic waves to the stove area, and the initial transmission direction of each third transmitting unit is vertically downward; wherein, the third transmitting unit includes at least one third transmitter.

[0011] Furthermore, the range hood also includes: at least one infrared detection device, which is arranged on the third mounting plate and is located between two adjacent third emitters in each third emitter; the infrared detection device is respectively arranged at intervals from two adjacent third emitters; the infrared detection device is used to detect whether the user is located below the third phased array device; wherein, when the third phased array device is turned on and the infrared detection device detects that the user is located below the third phased array device, the phase difference between each third transmitting unit is adjusted to make the combined beam avoid the user.

[0012] Furthermore, the infrared detection device is used to detect whether the stove area is in a ignited state and the oil fume concentration; the range hood also includes: an alarm device, the alarm device is arranged on the shell, the alarm device is connected to the infrared detection device, and the detection result of the infrared detection device is used to control the opening and closing of the alarm device according to the detected result; wherein, when the infrared detection device detects that the stove area is in a ignited state and the stove area is unattended, when the infrared detection device detects that the oil fume concentration is greater than or equal to a first preset value, the alarm device is controlled to turn on.

[0013] Furthermore, the front panel protrudes from the mounting surface of the third mounting plate; the range hood also includes: a first protective cover, the first protective cover is arranged on the mounting surface of the third mounting plate, the first protective cover and the third mounting plate form a first sealed cavity; the third phased array device and the infrared detection device are both located in the first sealed cavity.

[0014] Furthermore, the first phased array device also includes: at least one first receiving unit, the first receiving unit is arranged between two adjacent first transmitting units in each first transmitting unit, and the first receiving unit is respectively arranged to be spaced apart from the two adjacent first transmitting units; the first receiving unit is used for performing ultrasonic ranging; wherein, when the stove area is in an unlit state and the range hood is not in a smoking mode, the first receiving unit performs ultrasonic ranging.

[0015] Furthermore, the second phased array device also includes: at least one second receiving unit, the second receiving unit is arranged between two adjacent second transmitting units in each second transmitting unit, and the second receiving unit is respectively arranged to be spaced apart from the two adjacent second transmitting units; the second receiving unit is used for performing ultrasonic ranging; wherein, when the stove area is in an unlit state and the range hood is not in a smoking mode, the second receiving unit performs ultrasonic ranging.

[0016] Furthermore, the front panels protrude from the first mounting plate and the second mounting plate; the range hood also includes: a second protective cover and a third protective cover, the second protective cover and the third protective cover are respectively arranged on the first mounting plate and the second mounting plate; the second protective cover and the first mounting plate enclose a second sealed cavity, and the first phased array device is located in the second sealed cavity; the third protective cover and the second mounting plate enclose a third sealed cavity, and the second phased array device is located in the third sealed cavity.

[0017] According to another aspect of the present invention: a control method is provided, and the control method is applied to the above-mentioned range hood, and the control method includes: after the range hood is turned on, judging whether to execute the smoking mode according to the user instruction or the current oil fume concentration; if the range hood runs the smoking mode, adaptively adjusting the smoking gear according to the user instruction or the current oil fume concentration; and controlling at least part of the first phased array device and at least part of the second phased array device to transmit ultrasonic waves according to the adjusted smoking gear.

[0018] Furthermore, the first phased array device includes at least four first transmitting units, and the at least four first transmitting units are arranged at intervals along the width direction of the shell; the second phased array device includes at least four second transmitting units, and the at least four second transmitting units are arranged at intervals along the width direction of the shell; if the smoking gear is divided into N gears, N≥2; the method of controlling at least part of the first phased array device and at least part of the second phased array device to emit ultrasonic waves according to the adjusted smoking gear includes: controlling the number of ultrasonic waves emitted by each first transmitting unit and each second transmitting unit to be proportional to the smoking gear.

[0019] Furthermore, the number of ultrasonic waves emitted by each first transmitting unit and each second transmitting unit is controlled to be proportional to the smoking gear. Specifically, if the smoking gear is improved, the number of ultrasonic waves emitted by each first transmitting unit and each second transmitting unit is controlled to increase.

[0020] Furthermore, if the smoking gear is raised, the method for controlling the increase in the number of ultrasonic waves emitted by each first transmitting unit and each second transmitting unit includes: if the smoking gear is the first gear, controlling the two first transmitting units of the first phased array device close to the air inlet and the two second transmitting units of the second phased array device close to the air inlet to emit ultrasonic waves; if the smoking gear is the second gear, controlling the number of emissions of each first transmitting unit and each second transmitting unit to be 2+n, n≥1; wherein the opening order of each first transmitting unit and each second transmitting unit is starting from the side close to the air inlet and opening in sequence toward the direction away from the air inlet; the power of the ultrasonic waves emitted by the first phased array device and the second phased array device is the first preset power.

[0021] Furthermore, the control method is applied to the above-mentioned range hood, and the control method also includes: if the range hood operates in a smoking mode, determining whether to turn on the third phased array device according to the smoking gear; if the smoking gear is at the highest gear, turning on the third phased array device so that the first phased array device, the second phased array device and the third phased array device all emit ultrasonic waves; wherein the power of the ultrasonic waves emitted by the third phased array device is a first preset power.

[0022] Furthermore, the third phased array device includes: at least two third transmitting units, each third transmitting unit is arranged at intervals along the direction from the side of the third mounting plate close to the first mounting plate to the side of the third mounting plate away from the first mounting plate; the control method also includes: when the third phased array device is turned on, the phase difference of the ultrasonic wave is periodically adjusted between each third transmitting unit, so that within a single cycle, the propagation direction of the combined beam continuously changes from vertically downward to inclined toward the air inlet, thereby guiding the oil fume particles to move toward the air inlet.

[0023] Furthermore, the control method also includes: if the third phased array device is turned on, detecting whether the user is located below the third phased array device; if the user is located below the third phased array device, periodically adjusting the phase difference of the ultrasonic waves between each third transmitting unit so that the propagation direction of the combined beam avoids the user.

[0024] Furthermore, the first phased array device also includes: at least one first receiving unit, which is arranged between two adjacent first transmitting units in each first transmitting unit; the second phased array device also includes: at least one second receiving unit, which is arranged between two adjacent second transmitting units in each second transmitting unit; the control method also includes: judging whether the range hood enters the radar mode according to user instructions or the operation mode of the range hood and the situation of the stove area; if the range hood enters the radar mode, each first transmitting unit and the second transmitting unit periodically transmits ultrasonic pulses, the first receiving unit performs ultrasonic ranging on the ultrasonic pulses emitted by each first transmitting unit, and the second receiving unit performs ultrasonic ranging on the ultrasonic pulses emitted by each second transmitting unit; judging whether there is an animal entering the stove area according to the results of ultrasonic ranging performed by the first receiving unit and / or the second receiving unit; if so, each first transmitting unit and the second transmitting unit both emit ultrasonic waves at a second preset power to drive away the animal.

[0025] Furthermore, a method for determining whether the range hood enters the radar mode according to the operation mode of the range hood and the situation of the stove area includes: if the range hood is not in the smoking mode and the stove area is not in the ignition state within the first preset time, the range hood enters the radar mode.

[0026] Furthermore, the control method is applied to the above-mentioned range hood, and the control method also includes: detecting whether the stove area is in a ignited state and whether there is a user in the stove area; if the stove area is in a ignited state and there is no user in the stove area, determining whether the current oil fume concentration is greater than or equal to a first preset value; if the current oil fume concentration is greater than or equal to the first preset value, controlling the alarm device to turn on to prompt the user to take action.

[0027] Beneficial effects: Applying the technical solution of the present invention, the range hood provided by the present invention comprises: a housing, a first phased array device and a second phased array device, the housing having a front panel facing the stove area, a first mounting plate and a second mounting plate, wherein the front panel, the first mounting plate and the second mounting plate all extend along a preset track, and the first mounting plate, the front panel and the second mounting plate are sequentially arranged along the width direction of the housing, and the first mounting plate and the second mounting plate are respectively located on both sides of the front panel. An air inlet is provided on the front panel. In addition, the first phased array device and the second phased array device are respectively arranged on the first mounting plate and the second mounting plate, and the main function of the first phased array device and the second phased array device is to emit ultrasonic waves to the stove area. When the range hood turns on the smoking mode, at least part of the first phased array device and at least part of the second phased array device emit ultrasonic waves toward the stove area, and then the ultrasonic waves emitted by at least part of the first phased array device and at least part of the second phased array device are combined with the negative pressure formed at the air inlet to limit the diffusion of oil fume particles, so that the oil fume particles cannot be freely dispersed to the outside of the housing, and finally drawn out of the stove area. It can be seen that by setting the first phased array device and the second phased array device, the range hood of the present invention can efficiently capture and guide the oil fume particles into the machine in the smoking mode. When the ultrasonic waves emitted by the first phased array device and the second phased array device act together with the negative pressure formed at the air inlet, the diffusion of oil fume in the kitchen can be significantly reduced. And the ultrasonic wave can affect the air flow pattern, thereby making the oil fume particles more easily sucked into the air inlet, thereby improving the overall efficiency of smoke exhaust. At the same time, the front panel, the first mounting plate and the second mounting plate extend along the preset trajectory and are arranged in sequence along the width direction of the shell, so that the overall layout is more compact and reasonable, saving space. And the first phased array device and the second phased array device are respectively arranged on the first mounting plate and the second mounting plate. This design simplifies the external shape and internal space layout of the range hood, reduces the manufacturing difficulty and cost, and improves the aesthetics and maintenance convenience. By optimizing the internal structure, the maintenance and cleaning of the range hood become more convenient and quick, the failure rate is reduced, the service life of the range hood is extended, and the reliability of the system is improved. In addition, compared with the traditional pneumatic structure or air curtain device, the present invention effectively reduces the operating noise of the range hood by utilizing ultrasonic technology, creating a quieter cooking environment for users. At the same time, by optimizing airflow control and ultrasonic-assisted smoke exhaust, the range hood of the present invention reduces the operating power while maintaining the same suction performance, thereby achieving efficient smoke exhaust effect at lower energy consumption, which helps to save energy and reduce emissions. The range hood of the present invention effectively solves the technical problem of the complicated appearance and internal structure caused by the pneumatic structure or air curtain device used to restrict the spread of oil smoke in the range hood in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1A schematic structural diagram of a range hood according to an embodiment of the present invention from a first viewing angle is shown; Figure 2 A second perspective structural schematic diagram of an embodiment of a range hood of the present invention is shown; Figure 3 A third perspective structural schematic diagram of an embodiment of a range hood of the present invention is shown; Figure 4 A schematic diagram of the structure from a first viewing angle of the range hood of the present invention with the first protective cover, the second protective cover and the third protective cover removed is shown; Figure 5 A schematic diagram of the structure from a second viewing angle in an embodiment of the range hood of the present invention with the first protective cover, the second protective cover and the third protective cover removed is shown; Figure 6 A schematic structural diagram of a range hood according to an embodiment of the present invention with the first protective cover, the second protective cover and the third protective cover removed from a third viewing angle is shown; Figure 7 A schematic structural diagram showing an embodiment of a range hood of the present invention in which an infrared detection device is arranged on a third mounting plate; Figure 8 Shows Figure 7 A local enlarged view of point A; Fig. 9 A schematic diagram of a first viewing angle structure of a first phased array device and a second phased array device in an embodiment of a range hood of the present invention transmitting ultrasonic waves in a smoking mode is shown; Fig.10 A schematic diagram of a second viewing angle structure of the first phased array device and the second phased array device in the embodiment of the range hood of the present invention transmitting ultrasonic waves in the smoking mode is shown; Fig.11 A schematic diagram of the structure of the first viewing angle of the third phased array device in the embodiment of the range hood of the present invention transmitting ultrasonic waves in the smoking mode is shown; Fig.12 A schematic diagram of the structure of the range hood of the present invention in the second viewing angle in which the third phased array device transmits ultrasonic waves in the smoking mode is shown; Fig.13 A flow chart showing an embodiment of the control method of the present invention is shown.

[0029] The above drawings include the following reference numerals: 1. Shell; 11. Front panel; 110. Air inlet; 12. First mounting plate; 13. Second mounting plate; 14. Third mounting plate; 3. First phased array device; 31. First transmitting unit; 311. First transmitter; 4. Second phased array device; 41. Second transmitting unit; 411. Second transmitter; 5. Third phased array device; 51. Third transmitting unit; 511. Third transmitter; 6. Infrared detection device; 7. First protective cover; 8. Second protective cover; 9. Third protective cover. DETAILED DESCRIPTION

[0030] In order to enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work should fall within the scope of protection of the present application.

[0031] See also Figures 1 to 12 As shown, according to an embodiment of the present invention, the present invention provides a range hood, comprising: a shell 1, a first phased array device 3 and a second phased array device 4, the shell 1 having a front panel 11, a first mounting plate 12 and a second mounting plate 13 facing a stove area, the front panel 11, the first mounting plate 12 and the second mounting plate 13 all extending along a preset track; the first mounting plate 12, the front panel 11 and the second mounting plate 13 are sequentially arranged along the width direction of the shell 1, and the first mounting plate 12 and the second mounting plate 13 are respectively located on both sides of the front panel 11; an air inlet 110 is provided on the front panel 11; the first phased array device 3 and the second phased array device 4 are respectively arranged on the first mounting plate 12 and the second mounting plate 13, the first phased array device 3 and the second phased array device 4 are used to emit ultrasonic waves to the stove area; wherein, when the range hood turns on the smoking mode, the ultrasonic waves emitted by at least part of the first phased array device 3 and at least part of the second phased array device 4 and the negative pressure formed at the air inlet 110 limit the diffusion of oil smoke particles.

[0032] It can be seen that the range hood provided by the present invention comprises: a housing 1, a first phased array device 3 and a second phased array device 4, the housing 1 having a front panel 11 facing the stove area, a first mounting plate 12 and a second mounting plate 13, wherein the front panel 11, the first mounting plate 12 and the second mounting plate 13 all extend along a preset track, and the first mounting plate 12, the front panel 11 and the second mounting plate 13 are arranged along the width direction of the housing 1 (such as Figure 5The first and second phased array devices 12 and 13 are arranged in sequence along the direction indicated by the arrow B in the middle), and the first mounting plate 12 and the second mounting plate 13 are respectively located on both sides of the front panel 11. An air inlet 110 is provided on the front panel 11. In addition, the first phased array device 3 and the second phased array device 4 are respectively arranged on the first mounting plate 12 and the second mounting plate 13, and the main function of the first phased array device 3 and the second phased array device 4 is to emit ultrasonic waves to the stove area. When the range hood turns on the smoking mode, at least part of the first phased array device 3 and at least part of the second phased array device 4 emit ultrasonic waves toward the stove area, and then the ultrasonic waves emitted by at least part of the first phased array device 3 and at least part of the second phased array device 4 are combined with the negative pressure formed at the air inlet 110 to limit the diffusion of oil fume particles, so that the oil fume particles cannot be freely dispersed to the outside of the shell 1, and are finally drawn out of the stove area.

[0033] It can be seen that by setting the first phased array device 3 and the second phased array device 4, the range hood of the present invention can efficiently capture and guide the oil fume particles into the machine in the smoking mode. When the ultrasonic waves emitted by the first phased array device 3 and the second phased array device 4 act together with the negative pressure formed at the air inlet, the diffusion of oil fume in the kitchen can be significantly reduced. In addition, the ultrasonic wave can affect the air flow pattern, thereby making it easier for the oil fume particles to be sucked into the air inlet 110, thereby improving the overall efficiency of smoke exhaust. At the same time, the front panel 11, the first mounting plate 12 and the second mounting plate 13 extend along the preset trajectory and are arranged in sequence along the width direction of the housing 1, so that the overall layout is more compact and reasonable, saving space. In addition, the first phased array device 3 and the second phased array device 4 are respectively arranged on the first mounting plate 12 and the second mounting plate 13. This design simplifies the external shape and internal space layout of the range hood, reduces the manufacturing difficulty and cost, and improves the aesthetics and maintenance convenience. By optimizing the internal structure, the maintenance and cleaning of the range hood become more convenient and quick, the failure rate is reduced, the service life of the range hood is extended, and the reliability of the system is improved. In addition, compared with the traditional pneumatic structure or air curtain device, the present invention effectively reduces the operating noise of the range hood by utilizing ultrasonic technology, creating a quieter cooking environment for users. At the same time, by optimizing airflow control and ultrasonic-assisted smoke exhaust, the range hood of the present invention reduces the operating power while maintaining the same suction performance, thereby achieving efficient smoke exhaust effect at lower energy consumption, which helps to save energy and reduce emissions. The range hood of the present invention effectively solves the technical problem of the complicated appearance and internal structure caused by the pneumatic structure or air curtain device used to restrict the spread of oil smoke in the range hood in the prior art.

[0034] Alternatively, if Fig. 9 and Fig.10As shown, when the range hood is operated in the smoking mode, some components of the first phased array device 3 and the second phased array device 4 are turned on at the same time, and start to emit ultrasonic waves with a first preset power to the stove area. These ultrasonic waves have a specific frequency, thereby generating a standing wave effect.

[0035] The ultrasonic waves emitted by the first phased array device 3 and the second phased array device 4 are adjusted to be optimized with a set frequency and a first preset power, so that the sound waves interfere with each other on the surface of the stove. Through precise array design, the ultrasonic waves can generate standing waves in the stove area, which is a stationary wave pattern formed by the superposition of waves. The existence of standing waves constrains the oil fume particles under the action of the sound field and prevents them from freely diffusing to the outside of the range hood housing.

[0036] At the same time, when the ultrasonic waves (incident waves) emitted by the first phased array device 3 and the second phased array device 4 hit the surface of the stove, part of the waves will be reflected to form reflected waves. The combined effect of the incident wave and the reflected wave enhances the sound field intensity in the stove area, further restricting the movement of the oil fume particles. Through the interaction between the incident wave, the reflected wave and the negative pressure formed at the air inlet, the oil fume particles are constrained by a stronger force, thereby achieving effective isolation and extraction of the oil fume, and achieving the effect of ultrasonic smoke isolation.

[0037] In addition, when the ultrasonic waves (incident waves) emitted by the first phased array device 3 and the second phased array device 4 hit the surface of the stove, these ultrasonic waves will act on the oil stains on the stove, thereby decomposing the large area of ​​oil stains and reducing their adhesion. This effect significantly reduces the difficulty of cleaning the oil stains, making the cleaning process simpler and more efficient.

[0038] Its working principle is: Ultrasonic waves can induce tiny bubbles in the oil through high-frequency vibration (usually through the cavitation effect). These bubbles are constantly generated and collapsed with the vibration of ultrasonic waves, forming a strong impact force, which causes the oil particles to break or disperse. When the structure of the oil is broken down and granulated, the adhesion between the oil and the surface of the stove will be significantly reduced. In this way, the oil is easier to fall off the surface, which provides convenience for cleaning. Because the oil is effectively broken down and loosened, users can remove the oil more easily during cleaning, reducing the required detergents and physical cleaning efforts, and further improving the overall cleaning efficiency and effect.

[0039] The preset track refers to a shape or path predetermined during the design and manufacturing process of the front panel 11 , the first mounting plate 12 , and the second mounting plate 13 .

[0040] Optionally, the range hood is a side-suction range hood.

[0041] Optionally, the front panel 11, the first mounting plate 12 and the second mounting plate 13 all extend along a preset arc track, and the front panel 11, the first mounting plate 12 and the second mounting plate 13 are arc panels. With such a structure, the air inlet 110 can be used to achieve basic control of oil smoke.

[0042] Optionally, the front panel 11, the first mounting plate 12 and the second mounting plate 13 can also extend along a preset direction, and the extension direction of the front panel 11, the first mounting plate 12 and the second mounting plate 13 forms a preset angle with the vertical direction, and the front panel 11, the first mounting plate 12 and the second mounting plate 13 are all rectangular panels.

[0043] Furthermore, the mounting surfaces of the first mounting plate 12 and the second mounting plate 13 are both arranged facing the stove area, and the mounting surfaces of the first phased array device 3 and the second phased array device 4 are respectively arranged on the first mounting plate 12 and the second mounting plate 13 .

[0044] Specifically, Figures 4 to 6 As shown, the first phased array device 3 includes: at least two first transmitting units 31, at least two first transmitting units 31 are arranged on the first mounting plate 12 at intervals along the width direction of the housing 1; each first transmitting unit 31 is used to transmit ultrasonic waves to the stove area, and the transmitting direction of each first transmitting unit 31 is vertically downward; wherein, the first transmitting unit 31 includes at least one first transmitter 311. With such a structural arrangement, by arranging at least two first transmitting units 31 at intervals along the width direction of the housing 1, it is possible to ensure that the ultrasonic waves cover the entire stove area, and prevent the oil smoke from spreading to the uncovered area. The interval arrangement between each first transmitting unit 31 enables the ultrasonic waves to be evenly distributed above the stove, thereby improving the capture effect of the oil smoke particles. In addition, setting the transmitting direction of each first transmitting unit 31 vertically downward can facilitate the ultrasonic waves to act on the surface of the stove area (i.e., the surface of the stove), thereby effectively decomposing the oil stains on the surface of the stove area (i.e., the surface of the stove) and reducing its adhesion, and at the same time, it can also capture the newly generated oil smoke particles to the maximum extent to prevent them from spreading into the air. By directly aiming at the oil fume source, the chance of oil fume spreading during the rising process is reduced, so that more oil fume can be captured efficiently. In addition, the vertically downward ultrasonic wave can form a "virtual barrier" above the stove, limiting the upward diffusion of oil fume and ensuring that as much oil fume as possible is sucked into the air inlet. In addition, the vertically downward ultrasonic wave cooperates with the negative pressure formed at the air inlet 110 to enhance the effect of the negative pressure area. The ultrasonic wave can generate additional disturbances near the air inlet 110, further guiding the oil fume particles into the interior of the range hood.

[0045] Optionally, the first emitting unit 31 has a plurality of first emitting devices 311, and the plurality of first emitting devices 311 are arranged at intervals along the extension direction of the first mounting plate 12. Thus, the plurality of first emitting devices 311 in each first emitting unit 31 form an array.

[0046] Optionally, due to the small size of the first emitter 311, it can be integrated into a large-scale array, thereby improving the confinement effect, achieving lower operating power and lower noise to humans under the same suction performance, and reducing the impact of damage or changes to individual first emitters on the implementation effect.

[0047] Specifically, Figures 4 to 6 As shown, the second phased array device 4 includes: at least two second transmitting units 41, at least two second transmitting units 41 are arranged on the second mounting plate 13 at intervals along the width direction of the housing 1; each second transmitting unit 41 is used to transmit ultrasonic waves to the stove area, and the transmitting direction of each second transmitting unit 41 is vertically downward; wherein, the second transmitting unit 41 includes at least one second transmitter 411. With such a structural arrangement, by arranging at least two second transmitting units 41 at intervals along the width direction of the housing 1, it is possible to ensure that the ultrasonic waves cover the entire stove area and prevent the oil smoke from spreading to the uncovered area. The interval arrangement between each second transmitting unit 41 enables the ultrasonic waves to be evenly distributed above the stove, thereby improving the capture effect of the oil smoke particles. In addition, by setting the transmitting direction of each second transmitting unit 41 vertically downward, it is possible to facilitate the ultrasonic waves to act on the surface of the stove area (i.e., the surface of the stove), thereby effectively decomposing the oil stains on the surface of the stove area (i.e., the surface of the stove) and reducing its adhesion, and at the same time, it is possible to capture the newly generated oil smoke particles to the maximum extent and prevent them from spreading into the air. By directly aiming at the oil fume source, the chance of oil fume spreading during the rising process is reduced, so that more oil fume can be captured efficiently. In addition, the vertically downward ultrasonic wave can form a "virtual barrier" above the stove, limiting the upward diffusion of oil fume and ensuring that as much oil fume as possible is sucked into the air inlet. In addition, the vertically downward ultrasonic wave cooperates with the negative pressure formed at the air inlet 110 to enhance the effect of the negative pressure area. The ultrasonic wave can generate additional disturbances near the air inlet 110, further guiding the oil fume particles into the interior of the range hood.

[0048] Optionally, the second transmitting unit 41 has a plurality of second transmitters 411, and the plurality of second transmitting units 41 are arranged at intervals along the extension direction of the second mounting plate 13. Thus, the plurality of second transmitters 411 in each second transmitting unit 41 form an array.

[0049] Optionally, due to the small size of the second emitter 411, it can be integrated into a large-scale array, thereby improving the confinement effect, achieving lower operating power and lower noise to humans under the same suction performance, and reducing the impact of damage or changes to individual first emitters on the implementation effect.

[0050] Optionally, by setting a first phased array device 3 and a second phased array device 4, and the first phased array device 3 and the second phased array device 4 are respectively located on both sides of the stove area, and then in the smoking mode, the ultrasonic waves emitted by the first transmitting unit 31 and the second transmitting unit 41 form a "virtual barrier", thereby effectively restraining the oil smoke particles from spreading to both sides of the stove area.

[0051] Specifically, Figures 4 to 8 As shown, the shell 1 also includes: a third mounting plate 14, the third mounting plate 14 is located above the front panel 11, and the third mounting plate extends along the width direction of the shell 1; one side of the third mounting plate 14 is respectively connected to the first mounting plate 12 and the second mounting plate 13, and the other side of the third mounting plate 14 is protruded from the first mounting plate 12 and the second mounting plate 13; the mounting surface of the third mounting plate 14 is set toward the stove area; the range hood also includes: a third phased array device 5, the third phased array device 5 is set on the mounting surface of the third mounting plate 14, and the third phased array device 5 is used to emit ultrasonic waves to the stove area; wherein, when the range hood turns on the smoking mode and the third phased array device 5 is turned on, the third phased array device 5 guides the oil smoke particles to move toward the air inlet 110 by periodically adjusting the phase difference of the ultrasonic wave. With such a structural setting, by setting up the third phased array device, in the smoking mode, the first phased array device 3 and the second phased array device 4 are combined to emit ultrasonic waves from both sides to form a three-dimensional ultrasonic network, which more comprehensively covers the entire stove area and ensures that the oil fume particles are efficiently captured. In addition, the third phased array device 5 can dynamically adjust the direction and intensity of the ultrasonic wave by periodically adjusting the phase difference of the ultrasonic wave, further optimizing the airflow path, so that the oil fume particles move more smoothly toward the air inlet 110, and reduce the diffusion of oil fume.

[0052] Furthermore, the first mounting plate 12 , the second mounting plate 13 and the third mounting plate 14 are all arranged in sequence along the edge of the front panel 11 .

[0053] Optionally, the third mounting plate 14 is a rectangular plate, and the third mounting plate 14 is arranged opposite to the stove area.

[0054] Specifically, Figures 4 to 8As shown, the third phased array device 5 includes: at least two third transmitting units 51, at least two third transmitting units 51 are arranged on the mounting surface of the third mounting plate 14 at intervals along the direction from the side of the third mounting plate 14 close to the first mounting plate 12 to the side of the third mounting plate 14 away from the first mounting plate 12; each third transmitting unit 51 is used to transmit ultrasonic waves to the stove area, and the initial transmitting direction of each third transmitting unit 51 is vertically downward; wherein, the third transmitting unit 51 includes at least one third transmitter 511. With such a structural arrangement, each third transmitting unit 51 is evenly distributed along the width direction, so that the ultrasonic wave can fully cover the entire stove area, thereby preventing the oil smoke from spreading to the uncovered area. The vertically downward ultrasonic wave can directly act on the oil smoke source, maximize the capture of the newly generated oil smoke particles, and prevent them from spreading into the air. In addition, by periodically adjusting the ultrasonic wave phase difference between each third transmitting unit 51, the direction and intensity of the ultrasonic wave can be dynamically adjusted, and the airflow path can be further optimized, so that the oil smoke particles can move more smoothly toward the air inlet 110, thereby realizing high-frequency smoke sweeping and achieving the effect of efficient oil smoke removal.

[0055] Alternatively, if Fig.11 and Fig.12 As shown, it is determined whether to turn on the third phased array device 5 according to the smoking gear. If the smoking gear is at the highest gear, the third phased array device 5 is turned on. In the initial state, the direction of each third transmitting unit 51 emitting ultrasonic waves is vertically downward, and then by periodically adjusting the phase difference between each third transmitting unit 51, the propagation direction of the combined beam will gradually change from vertically downward to the inclined direction toward the air inlet 110 within one cycle. At the end of each cycle, the combined beam is reset to the vertical downward state again, and then enters the next cycle to form a continuous ultrasonic emission mode. In the sound field formed by the ultrasonic wave, the ultrasonic wave not only effectively isolates the oil smoke, but also exerts force on the oil smoke particles to move them toward the air inlet 110, thereby achieving the effect of high-frequency smoke sweeping. This method helps to capture newly generated oil smoke particles and reduce their concentration in the air. It can be seen that through the phased array mode, the efficiency of oil smoke removal can be improved, and at the same time, the demand for ultrasonic output power can be reduced while ensuring the implementation effect, thereby saving energy.

[0056] The combined beam mentioned above refers to the superposition of ultrasonic waves emitted by each third transmitting unit 51 in space. By adjusting the phase of each third transmitting unit 51, the emitted waves can be superimposed on each other, thereby forming a new combined beam direction.

[0057] Optionally, the third transmitting unit 51 has a plurality of third transmitters 511, and the plurality of third transmitters 511 are arranged at intervals along the width direction of the housing 1. Thus, the plurality of third transmitters 511 in each third transmitting unit 51 form an array.

[0058] Specifically, Figure 7 and Figure 8 As shown, the range hood further includes: at least one infrared detection device 6, which is arranged on the third mounting plate 14, and is located between two adjacent third emitters 511 in each third emitter 511; the infrared detection device 6 is arranged at intervals from two adjacent third emitters 511; the infrared detection device 6 is used to detect whether the user is located below the third phased array device 5; wherein, when the third phased array device 5 is turned on, and the infrared detection device 6 detects that the user is located below the third phased array device 5, the phase difference between each third transmitting unit 51 is adjusted to make the combined beam avoid the user. With such a result setting, by setting the infrared detection device 6, it is possible to monitor in real time whether the user is located below the third phased array device 5, and then when the infrared detection device 6 detects that the user is located below the third phased array device 5, the system automatically adjusts the phase difference between each third transmitting unit 51 to make the combined beam avoid the user. This effectively avoids the direct effect of ultrasound on the human body and improves the safety of use. The infrared detection device 6 can monitor the user's movement in real time to ensure that the system can respond in time when the user approaches or leaves, avoiding safety hazards caused by misoperation. In addition, the infrared detection device 6 monitors the user's position in real time, and the system can dynamically adjust the ultrasonic emission parameters to achieve intelligent avoidance and provide a more user-friendly experience. It can also flexibly adjust the ultrasonic phase difference according to the user's actual position to ensure the best smoke exhaust effect while ensuring the comfort and safety of the user.

[0059] Specifically, the infrared detection device 6 is also used to detect whether the stove area is in a burning state and the oil fume concentration; the range hood also includes: an alarm device, the alarm device is arranged on the housing 1, the alarm device is connected to the infrared detection device 6, and the detection result of the infrared detection device 6 is used to control the opening and closing of the alarm device according to the detected result; wherein, when the infrared detection device 6 detects that the stove area is in a burning state and the stove area is unattended, the infrared detection device 6 detects that the oil fume concentration is greater than or equal to the first preset value, and controls the alarm device to turn on. With such a structural setting, the infrared detection device 6 monitors whether the stove area is in a burning state in real time, ensuring that the alarm is issued in time when there is no one to guard, to prevent safety hazards such as fire. When it is detected that the stove area is unattended and the oil fume concentration exceeds the standard, the system will automatically trigger the alarm device to remind the user to take measures to avoid potential dangers.

[0060] Optionally, the infrared detection device 6 has the function of detecting the position of the user (i.e., the user) and determining whether the user is directly below the third phased array device 5. In addition, it is also used to detect whether the stove area is in a ignition state and the smoke concentration. Preferably, the infrared detection device 6 is an infrared thermal imaging sensor.

[0061] Optionally, the infrared detection device 6 (ie, infrared thermal imaging sensor) detects whether the user is located below the third phased array device 5 by capturing infrared radiation emitted by a human body.

[0062] Furthermore, the flame will also emit strong infrared radiation, so the infrared detection device 6 (ie, infrared thermal imaging sensor) can also identify the presence of the flame.

[0063] Working principle of detecting oil fume concentration: The infrared detection device 6 (infrared thermal imaging sensor) uses physical laws to directly receive infrared radiation generated by particulate matter in oil fume (such as grease particles, smoke, etc.). The received infrared radiation will be converted into an electrical signal by the infrared detection device 6 (infrared thermal imaging sensor). By analyzing the change in the intensity of the converted electrical signal, the system can determine the concentration level of oil fume in real time. When the concentration is detected to exceed the set threshold, the alarm device will be automatically activated, thereby realizing effective monitoring of the oil fume concentration.

[0064] In addition, the infrared detection device 6 can also have the function of emitting infrared rays. When emitting infrared rays, these infrared light waves can penetrate the particles in the air. Since the particles in the fume (such as grease particles, smoke, etc.) will absorb infrared rays, this means that when the infrared light passes through the air containing the fume, part of the infrared light will be absorbed by the fume particles.

[0065] When infrared light passes through the air mixed with oil smoke, the unabsorbed infrared light will be reflected back to the infrared detection device. Therefore, the infrared light intensity will be weakened when it reaches the infrared detection device 6. The degree of this weakening is proportional to the oil smoke concentration: the higher the oil smoke concentration, the more infrared light is absorbed, and the weaker the intensity of the infrared signal reflected back.

[0066] By analyzing the changes in the intensity of infrared signals, the system can determine the concentration level of oil smoke in real time. When the concentration exceeds the set threshold, the alarm device will automatically activate.

[0067] Specifically, Figures 1 to 3As shown, the front panel 11 protrudes from the mounting surface of the third mounting plate 14; the range hood also includes: a first protective cover 7, the first protective cover 7 is arranged on the mounting surface of the third mounting plate 14, and the first protective cover 7 and the third mounting plate 14 enclose a first sealed cavity; the third phased array device 5 and the infrared detection device 6 are both located in the first sealed cavity. With such a structural arrangement, the third phased array device 5 and the infrared detection device 6 can be protected by arranging the first protective cover 7, and the first protective cover 7 and the third mounting plate 14 enclose a first sealed cavity, thereby effectively preventing external pollutants such as dust, water vapor, and oil smoke particles from entering, ensuring the normal operation of the third phased array device 5 and the infrared detection device 6, and extending their service life. In addition, by arranging the first protective cover 7, the third phased array device 5 and the infrared detection device 6 can be prevented from being damaged by external impact or accidental damage, thereby improving the reliability of the equipment. In addition, the third phased array device 5 and the infrared detection device 6 are hidden in the first sealed cavity, thereby keeping the housing clean and smooth, and enhancing the visual beauty.

[0068] Optionally, the first protective cover 7 is horizontally arranged with the front panel 11 , so that when the first protective cover 7 is mounted on the third mounting plate 14 , it can form a continuous and flat outer surface with the front panel 11 .

[0069] Specifically, the first phased array device 3 also includes: at least one first receiving unit, the first receiving unit is arranged between two adjacent first transmitting units 31 in each first transmitting unit 31, and the first receiving unit is arranged at intervals from the two adjacent first transmitting units 31; the first receiving unit is used for ultrasonic ranging; wherein, when the stove area is in an unlit state and the range hood is not in a smoking mode, the first receiving unit performs ultrasonic ranging. With such a structural setting, the range hood can use the first receiving unit to perform ultrasonic ranging when it is not in a smoking mode, so as to monitor the situation of the stove area in real time. Based on the ranging data, the range hood can execute corresponding operating modes and actions, thereby improving safety. In addition, the range hood can also dynamically adjust the working parameters according to the ranging results of the first receiving unit, further enhancing the level of intelligence and improving the user experience.

[0070] Furthermore, the first receiving unit is a first receiver.

[0071] Optionally, in an actual working process, at least one of the multiple first transmitters 311 in the first transmitting unit 31 may be replaced by a first receiver.

[0072] Specifically, the second phased array device 4 also includes: at least one second receiving unit, the second receiving unit is arranged between two adjacent second transmitting units 41 in each second transmitting unit 41, and the second receiving unit is arranged at intervals from the two adjacent second transmitting units 41; the second receiving unit is used for ultrasonic ranging; wherein, when the stove area is in an unlit state and the range hood is not in the smoking mode, the second receiving unit performs ultrasonic ranging. With such a structural setting, the range hood can use the second receiving unit to perform ultrasonic ranging when it is not in the smoking mode, so as to monitor the situation of the stove area in real time. Based on the ranging data, the range hood can execute the corresponding operating mode and action, so as to improve safety. In addition, the range hood can also dynamically adjust the working parameters according to the ranging results of the second receiving unit, further enhance the level of intelligence, and improve the user experience.

[0073] Furthermore, the second receiving unit is a second receiver.

[0074] Optionally, in actual operation, at least one of the multiple second transmitters 411 in the second transmitting unit 41 may be replaced with a second receiver.

[0075] Furthermore, when the range hood is not in the smoking mode, the infrared detection device 6 detects whether the stove area is not in a ignited state. If the range hood is not in the smoking mode, and within the first preset time, the infrared detection device 6 detects that the stove area is not in a ignited state, the range hood enters the radar mode. Alternatively, the user issues a command to the range hood to enter the radar mode.

[0076] If the range hood enters the radar mode, each first transmitting unit 31 and each second transmitting unit 41 periodically transmits ultrasonic pulses, the first receiving unit performs ultrasonic ranging on the ultrasonic pulses emitted by each first transmitting unit 31, and the second receiving unit performs ultrasonic ranging on the ultrasonic pulses emitted by each second transmitting unit 41, and then judges whether an animal has entered the stove area according to the results of ultrasonic ranging by the first receiving unit and / or the second receiving unit; if so, each first transmitting unit 31 and each second transmitting unit 41 both transmit ultrasonic waves at a second preset power to drive away the animal. The second preset power is greater than the first preset power, and at this time, the output frequency of each first transmitting unit 31 and each second transmitting unit 41 changes continuously between 20 and 64 kHz.

[0077] The advantages of this radar mode are: 1. It improves the problem that the infrared detection device 6 cannot perceive spatial changes and is difficult to detect cold-blooded animals such as cockroaches; the output frequency domain of each first transmitting unit 31 and each second transmitting unit 41 covers the hearing range of animals such as dogs, cats, and mice, and is highly effective and harmless to humans. When a certain frequency and power are reached, pests can also be killed directly.

[0078] Ultrasonic ranging refers to a technology that uses the propagation characteristics of ultrasonic waves to measure the distance between objects. It determines the distance of an object by emitting ultrasonic pulses and receiving the reflected signals, calculating the time it takes for the ultrasonic waves to travel back and forth between the transmitter and the target object.

[0079] Specifically, the front panel 11 is protruding from the first mounting plate 12 and the second mounting plate 13; the range hood further includes: a second protective cover 8 and a third protective cover 9, which are respectively arranged on the first mounting plate 12 and the second mounting plate 13; the second protective cover 8 and the first mounting plate 12 form a second sealed cavity, in which the first phased array device 3 is located; the third protective cover 9 and the second mounting plate 13 form a third sealed cavity, in which the second phased array device 4 is located. With such a structural arrangement, the first phased array device 3 and the second phased array device 4 can be protected by arranging the second protective cover 8 and the third protective cover 9, respectively, and the second protective cover 8 and the first mounting plate 12 form a second sealed cavity, and the third protective cover 9 and the second mounting plate 13 form a third sealed cavity, thereby effectively preventing external pollutants such as dust, water vapor, and oil fume particles from entering, ensuring the normal operation of the first phased array device 3 and the second phased array device 4, and extending their service life. Furthermore, by providing the second protective cover 8 and the third protective cover 9, the first phased array device 3 and the second phased array device 4 can be prevented from being damaged by external impact or accident, thereby improving the reliability of the device. In addition, the first phased array device 3 and the second phased array device 4 are hidden in the second sealed cavity and the third sealed cavity, respectively, thereby keeping the housing clean and smooth, and enhancing the visual beauty.

[0080] Optionally, the second protective cover 8 and the third protective cover 9 are both arranged horizontally with the front panel 11 , so that when the second protective cover 8 and the third protective cover 9 are respectively mounted on the first mounting plate 12 and the second mounting plate 13 , they can form a continuous and flat outer surface with the front panel 11 .

[0081] Optionally, the first protective cover 7, the second protective cover 8 and the third protective cover 9 may be integrally formed.

[0082] Optionally, the first protective cover 7, the second protective cover 8 and the third protective cover 9 are all thin shell structures, which form a continuous and flat outer surface with the front panel 11 after installation; the first protective cover 7, the second protective cover 8 and the third protective cover 9 are all made of materials that have no obvious barrier to the propagation of ultrasonic waves and infrared rays, thereby minimizing the attenuation of ultrasonic waves when passing through the first protective cover 7, the second protective cover 8 and the third protective cover 9 respectively.

[0083] The present invention provides a control method, which is applied to the range hood of the above embodiment. Fig.13 As shown, the control method includes: S11. After the range hood is turned on, whether to execute the smoking mode is determined according to a user instruction or the current oil smoke concentration.

[0084] S12, if the range hood is in the smoking mode, the smoking gear is adaptively adjusted according to the user's instruction or the current smoke concentration; S13, controlling at least a portion of the first phased array device 3 and at least a portion of the second phased array device 4 to emit ultrasonic waves according to the adjusted smoking gear.

[0085] With this control method, the system can intelligently determine whether to enter the smoking mode based on user instructions and real-time monitored fume concentration, providing a more flexible operation mode. In addition, the system can dynamically adjust the smoking gear according to the actual fume concentration to ensure the best exhaust effect while saving energy and providing a smarter user experience. By adaptively adjusting the smoking gear, the system can more accurately control the emission parameters of the ultrasound to ensure that the ultrasound and negative pressure work together to maximize the capture of fume particles. In addition, the intelligent control system can adjust the working mode according to actual needs, improve the exhaust efficiency, and reduce the spread of fume in the kitchen. And dynamically adjust the working mode according to the actual fume concentration to avoid unnecessary high-power operation and further save energy.

[0086] Specifically, the first phased array device 3 includes at least four first transmitting units 31, and the at least four first transmitting units 31 are arranged at intervals along the width direction of the housing 1; the second phased array device 4 includes at least four second transmitting units 41, and the at least four second transmitting units 41 are arranged at intervals along the width direction of the housing 1; if the smoking gear is divided into N gears, N≥2; the method for controlling at least part of the first phased array device 3 and at least part of the second phased array device 4 to transmit ultrasonic waves according to the adjusted smoking gear includes: controlling the number of ultrasonic waves emitted by each first transmitting unit 31 and each second transmitting unit 41 to be proportional to the smoking gear. With such a control method, by dynamically adjusting the number of transmitting units according to the smoking gear, the system can more accurately control the emission intensity and coverage of the ultrasonic wave to ensure that the oil smoke particles are efficiently captured. The system automatically selects a suitable smoking gear according to the real-time monitored oil smoke concentration, and adjusts the number of transmitting units accordingly, thereby providing a more intelligent operation experience. In addition, the adjustment of the number of transmitting units under different gears enables the system to flexibly respond to different cooking scenarios (such as light cooking or heavy cooking) to ensure the best smoke exhaust effect.

[0087] Specifically, the number of ultrasonic waves emitted by each first transmitting unit 31 and each second transmitting unit 41 is controlled to be proportional to the smoking gear, specifically: if the smoking gear is raised, the number of ultrasonic waves emitted by each first transmitting unit 31 and each second transmitting unit 41 is controlled to increase. With such a control method, the number of transmitting units emitting ultrasonic waves in the first phased array device 3 and the second phased array device 4 is dynamically adjusted according to the current smoking gear, thereby enhancing the intensity and coverage of the ultrasonic field, more effectively capturing oil fume particles, and reducing oil fume diffusion. Therefore, at each gear, the oil fume particles can be more smoothly guided to the air inlet 110, thereby further improving the smoke exhaust efficiency. In addition, the working mode is dynamically adjusted according to the actual oil fume concentration to avoid unnecessary high-power operation and further save energy.

[0088] Specifically, if the smoking gear is raised, the method for controlling each first transmitting unit 31 and each second transmitting unit 41 to emit an increasing number of ultrasonic waves includes: if the smoking gear is the first gear, controlling the two first transmitting units 31 of the first phased array device 3 close to the air inlet 110 and the two second transmitting units 41 of the second phased array device 4 close to the air inlet 110 to emit ultrasonic waves; if the smoking gear is the second gear, controlling the number of emissions of each first transmitting unit 31 and each second transmitting unit 41 to be 2+n, n≥1; wherein the opening order of each first transmitting unit 31 and each second transmitting unit 41 is starting from the side close to the air inlet 110 and opening in sequence in the direction away from the air inlet 110; the power of the ultrasonic waves emitted by the first phased array device 3 and the second phased array device 4 is the first preset power. By adopting such a control method, when the smoking gear is the first gear, the two first transmitting units 31 of the first phased array device 3 close to the air inlet 110 and the two second transmitting units 41 of the second phased array device 4 close to the air inlet 110 are controlled to transmit ultrasonic waves, thereby confining the oil fume particles near the air inlet 110, ensuring that the ultrasonic field can effectively guide the oil fume particles into the air inlet and reduce diffusion. As the smoking gear is raised, more transmitting units are activated to form a stronger ultrasonic field, further optimizing the airflow path and improving the smoke exhaust efficiency. In summary, when the smoking gear is raised, the number of transmitting units that transmit ultrasonic waves in the first phased array device 3 and the second phased array device 4 is gradually increased, and these transmitting units are turned on in a specific order. This design significantly improves the smoke exhaust efficiency, enhances the level of intelligence, improves the user experience, and achieves energy-saving and environmental protection effects.

[0089] Specifically, the control method further includes: if the range hood operates in the smoking mode, judging whether to turn on the third phased array device 5 according to the smoking gear; if the smoking gear is the highest gear, turning on the third phased array device 5, so that the first phased array device 3, the second phased array device 4 and the third phased array device 5 all emit ultrasonic waves; wherein the power of the ultrasonic waves emitted by the third phased array device 5 is the first preset power. With such a control method, when the smoking gear is the highest gear, by turning on the third phased array device 5, the three phased array devices work simultaneously, thereby forming a three-dimensional ultrasonic field, covering the entire stove area to the maximum extent, ensuring that the oil fume particles are efficiently captured and reduced in diffusion. And the third phased array device 5 emits ultrasonic waves from above, and cooperates with the ultrasonic waves emitted from both sides by the first and second phased array devices, thereby enhancing the negative pressure effect, further optimizing the airflow path, and improving the smoke exhaust efficiency. In addition, more transmitting units are gradually activated according to actual needs to ensure that the best smoke exhaust effect can be provided at any gear, while avoiding excessive consumption of resources.

[0090] Specifically, the third phased array device 5 includes: at least two third transmitting units 51, each of which is arranged at intervals along the direction from the side of the third mounting plate 14 close to the first mounting plate 12 to the side of the third mounting plate 14 away from the first mounting plate 12; the control method also includes: when the third phased array device 5 is turned on, the phase difference of the ultrasonic wave is periodically adjusted between each third transmitting unit 51, so that in a single cycle, the propagation direction of the combined beam changes continuously from vertical downward to inclined in the direction of the air inlet 110, thereby guiding the oil fume particles to move toward the air inlet 110. With such a control method, after the third phased array device 5 is turned on, the phase difference of the ultrasonic wave is periodically adjusted between each third transmitting unit 51, so that the combined beam can dynamically adjust the propagation direction, forming a guiding path that gradually tilts from vertical downward, more effectively capturing and guiding the oil fume particles into the air inlet 110, and reducing the diffusion of oil fume. In addition, the airflow path is further optimized through the dynamic change of the ultrasonic wave, ensuring that the oil fume particles are more smoothly sucked into the air inlet, thereby improving the overall smoke exhaust efficiency.

[0091] Specifically, the control method also includes: if the third phased array device 5 is turned on, detecting whether the user is located below the third phased array device 5; if the user is located below the third phased array device 5, periodically adjusting the phase difference of the ultrasonic wave between each third transmitting unit 51 so that the propagation direction of the combined beam avoids the user. With such a control method, when the third phased array device 5 is turned on and the user is located below it, the phase difference of the ultrasonic wave will be periodically adjusted between each third transmitting unit 51 so that the propagation direction of the combined beam avoids the user. This effectively avoids the direct effect of ultrasonic waves on the human body, thereby improving the safety of use. In addition, the system dynamically adjusts the emission parameters of the ultrasonic wave according to the detected results, realizes intelligent avoidance, and provides a more humane use experience. At the same time, the system can flexibly adjust the phase difference of the ultrasonic wave according to the actual position of the user, ensuring the comfort and safety of the user while optimizing the smoke exhaust effect.

[0092] Specifically, the first phased array device 3 also includes: at least one first receiving unit, which is arranged between two adjacent first transmitting units 31 in each first transmitting unit 31; the second phased array device 4 also includes: at least one second receiving unit, which is arranged between two adjacent second transmitting units 41 in each second transmitting unit 41; the control method also includes: judging whether the range hood enters the radar mode according to the user instruction or the operation mode of the range hood and the situation of the stove area; if the range hood enters the radar mode, each first transmitting unit 31 and the second transmitting unit 41 periodically transmits ultrasonic pulses, the first receiving unit performs ultrasonic ranging on the ultrasonic pulses emitted by each first transmitting unit 31, and the second receiving unit performs ultrasonic ranging on the ultrasonic pulses emitted by each second transmitting unit 41; judging whether an animal has entered the stove area according to the results of ultrasonic ranging performed by the first receiving unit and / or the second receiving unit; if so, each first transmitting unit 31 and the second transmitting unit 41 both emit ultrasonic waves at a second preset power to drive away the animal. With this control method, the stove area is monitored in real time through ultrasonic ranging, and animals that stray into the stove area can be found and driven away in time, thus effectively preventing animals from entering the stove area. At the same time, the system can automatically activate the protection mechanism when there is no one on duty, further improving the safety of the kitchen. In addition, the system automatically enters the radar mode according to user instructions or real-time monitored environmental conditions, providing a more intelligent operation experience.

[0093] The second preset power is greater than the first preset power.

[0094] Specifically, the method for judging whether the range hood enters the radar mode according to the operation mode of the range hood and the situation of the stove area includes: if the range hood is not in the smoking mode, and the stove area is not in the ignition state within the first preset time, the range hood enters the radar mode. With such a control method, by setting specific conditions to enter the radar mode, the system can automatically start the ultrasonic ranging function when no one is using it, monitor the kitchen environment in real time, and prevent accidents. In addition, the system can automatically decide whether to enter the radar mode according to the operation mode of the range hood and the actual situation of the stove area, providing a more intelligent operation experience. And the automatic adjustment in different scenarios enables the system to flexibly respond to various situations to ensure the best safety and use effect.

[0095] Specifically, the control method also includes: detecting whether the stove area is in a burning state and whether there is a user in the stove area; if the stove area is in a burning state and there is no user in the stove area, determining whether the current oil fume concentration is greater than or equal to a first preset value; if the current oil fume concentration is greater than or equal to the first preset value, controlling the alarm device to turn on to prompt the user to handle it. With such a control method, by real-time monitoring of the state of the stove area, the alarm device can be automatically activated when no one is watching, reminding the user to pay attention to safety, avoiding safety hazards caused by no one watching (such as fire, overheating of the oil pan, etc.), and further improving the safety of the kitchen. And according to the burning state of the stove area, the presence of the user and the oil fume concentration, it is automatically determined whether the alarm device needs to be turned on, providing a more intelligent operation experience.

[0096] Optionally, the specific steps of the range hood control method are: Among them, the first phased array device 3 includes at least four first transmitting units 31, and the at least four first transmitting units 31 are arranged at intervals along the width direction of the shell 1; the second phased array device 4 includes at least four second transmitting units 41, and the at least four second transmitting units 41 are arranged at intervals along the width direction of the shell 1; if the smoking gear is divided into N gears, N≥2; the third phased array device 5 includes: at least two third transmitting units 51, and each third transmitting unit 51 is arranged at intervals from the side of the third mounting plate 14 close to the first mounting plate 12 to the side of the third mounting plate 14 away from the first mounting plate 12.

[0097] Step 1: After the range hood is turned on, determine whether to execute the smoking mode according to the user's instructions or the current smoke concentration; if the range hood is running in the smoking mode, execute the corresponding smoking gear according to the user's instructions or the current smoke concentration; according to the smoking gear, adjust the number of transmitting units that transmit ultrasonic waves in the first phased array device 3 and the second phased array device 4, and select whether to turn on the third phased array device 5.

[0098] Step 2: If the smoking gear is the first gear, the two first transmitting units 31 of the first phased array device 3 close to the air inlet 110 and the two second transmitting units 41 of the second phased array device 4 close to the air inlet 110 are controlled to transmit ultrasonic waves; if the smoking gear is the second gear, the number of transmissions of each first transmitting unit 31 and each second transmitting unit 41 is controlled to be 2+n, n≥1; wherein, the opening order of each first transmitting unit 31 and each second transmitting unit 41 is to start from the side close to the air inlet 110 and turn on in the direction away from the air inlet 110 in sequence. If the smoking gear is the highest gear, the third phased array device 5 is turned on, so that the first phased array device 3, the second phased array device 4 and the third phased array device 5 all transmit ultrasonic waves. wherein, the power of the ultrasonic waves emitted by the first phased array device 3, the second phased array device 4 and the third phased array device 5 is the first preset power.

[0099] Step 3: When the smoking gear is at the highest gear, each third transmitting unit 51 periodically adjusts the phase difference of the ultrasonic wave, so that in a single cycle, the propagation direction of the combined beam continuously changes from vertically downward to tilted toward the air inlet 110, thereby guiding the oil smoke particles to move toward the air inlet 110. At the same time, the infrared detection device 6 detects whether the user is located directly below the third phased array device 5; if the user is located directly below the third phased array device 5, each third transmitting unit 51 periodically re-adjusts the phase difference of the ultrasonic wave, so that the propagation direction of the combined beam avoids the user.

[0100] Step 4: If the range hood is not in the smoking mode, and within the first preset time, the infrared detection device 6 detects that the stove area has not been in a ignited state, the range hood enters the radar mode, or the range hood executes the radar mode by user instruction.

[0101] Step 5: When the radar mode is in operation, each first transmitting unit 31 and the second transmitting unit 41 periodically transmit ultrasonic pulses, the first receiving unit performs ultrasonic ranging on the ultrasonic pulses emitted by each first transmitting unit 31, and the second receiving unit performs ultrasonic ranging on the ultrasonic pulses emitted by each second transmitting unit 41. When the first receiving unit and the second receiving unit perform ultrasonic ranging and determine that an animal has entered the stove area, each first transmitting unit 31 and the second transmitting unit 41 both transmit ultrasonic waves at the second preset power to drive the animal away. When each first transmitting unit 31 and the second transmitting unit 41 both transmit ultrasonic waves at the second preset power, the output frequency of each first transmitting unit 31 and the second transmitting unit 41 continuously changes between 20 and 64 kHz.

[0102] Step 6: When the infrared detection device 6 detects that the stove area is in a ignited state and there is no user in the stove area, it will start to detect the oil fume concentration. When the oil fume concentration is detected to be greater than or equal to the first preset value, the alarm device will be turned on to remind the user to take action.

[0103] The alarm device may be a buzzer.

[0104] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable when appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0105] Optionally, the specific examples in this embodiment may refer to the examples described in the above embodiments, and this embodiment will not be described in detail here.

[0106] The serial numbers of the above-mentioned embodiments of the present application are for description only and do not represent the advantages or disadvantages of the embodiments.

[0107] In the above embodiments of the present application, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, please refer to the relevant description of other embodiments.

[0108] The above is only a preferred embodiment of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. A range hood, characterized in that: include: A shell (1), the shell (1) comprising a front panel (11) facing a stove top area, a first mounting plate (12) and a second mounting plate (13), the front panel (11), the first mounting plate (12) and the second mounting plate (13) all extending along a preset track; the first mounting plate (12), the front panel (11) and the second mounting plate (13) are arranged in sequence along a width direction of the shell (1), and the first mounting plate (12) and the second mounting plate (13) are respectively located on both sides of the front panel (11); an air inlet (110) is provided on the front panel (11); A first phased array device (3) and a second phased array device (4), wherein the first phased array device (3) and the second phased array device (4) are respectively arranged on the first mounting plate (12) and the second mounting plate (13), and the first phased array device (3) and the second phased array device (4) are used to transmit ultrasonic waves to the stove area; When the range hood is in smoking mode, the diffusion of smoke particles is restricted by the negative pressure formed at the air inlet (110) and by the ultrasonic waves emitted by at least part of the first phased array device (3) and at least part of the second phased array device (4).

2. The range hood according to claim 1, characterized in that: The first phased array device (3) comprises: at least two first transmitting units (31), the at least two first transmitting units (31) being arranged on the first mounting plate (12) at intervals along the width direction of the shell (1); each first transmitting unit (31) is used to transmit ultrasonic waves to the stove area, and the transmitting direction of each first transmitting unit (31) is vertically downward; Wherein, the first transmitting unit (31) comprises at least one first transmitter (311).

3. The range hood according to claim 1, characterized in that: The second phased array device (4) comprises: at least two second transmitting units (41), the at least two second transmitting units (41) being arranged on the second mounting plate (13) at intervals along the width direction of the shell (1); each second transmitting unit (41) is used to transmit ultrasonic waves to the stove area, and the transmitting direction of each second transmitting unit (41) is vertically downward; Wherein, the second transmitting unit (41) comprises at least one second transmitter (411).

4. The range hood according to claim 1, characterized in that: The shell (1) further comprises: a third mounting plate (14), the third mounting plate (14) being located above the front panel (11), and the third mounting plate extending along the width direction of the shell (1); one side of the third mounting plate (14) being connected to the first mounting plate (12) and the second mounting plate (13) respectively, and the other side of the third mounting plate (14) being arranged to protrude from the first mounting plate (12) and the second mounting plate (13); the mounting surface of the third mounting plate (14) being arranged to face the stove top area; the range hood further comprises: a third phased array device (5), the third phased array device (5) being arranged on a mounting surface of the third mounting plate (14), the third phased array device (5) being used to transmit ultrasonic waves to the stove top area; When the range hood is in smoking mode and the third phased array device (5) is turned on, the third phased array device (5) guides the oil fume particles to move towards the air inlet (110) by periodically adjusting the phase difference of the ultrasonic wave.

5. The range hood according to claim 4, characterized in that: The third phased array device (5) comprises: at least two third transmitting units (51), at least two of the third transmitting units (51) being arranged on the mounting surface of the third mounting plate (14) at intervals along a direction from a side of the third mounting plate (14) close to the first mounting plate (12) to a side of the third mounting plate (14) away from the first mounting plate (12); each of the third transmitting units (51) is used to transmit ultrasonic waves to the stove area, and an initial transmitting direction of each of the third transmitting units (51) is vertically downward; Wherein, the third transmitting unit (51) comprises at least one third transmitter (511).

6. The range hood according to claim 5, characterized in that: The range hood further comprises: at least one infrared detection device (6), the infrared detection device (6) being arranged on the third mounting plate (14), and the infrared detection device (6) being located between two adjacent third emitters (511) among the third emitters (511); the infrared detection device (6) being arranged at intervals from two adjacent third emitters (511); the infrared detection device (6) being used to detect whether a user is located below the third phased array device (5); When the third phased array device (5) is turned on and the infrared detection device (6) detects that the user is located below the third phased array device (5), the phase difference between each of the third transmitting units (51) is adjusted so that the combined beam avoids the user.

7. The range hood according to claim 6, characterized in that: The infrared detection device (6) is used to detect whether the stove area is in a burning state and the concentration of oil smoke; the range hood further comprises: an alarm device, the alarm device is arranged on the housing (1), the alarm device is connected to the infrared detection device (6), and the detection result of the infrared detection device (6) is used to control the opening and closing of the alarm device according to the detection result; When the infrared detection device (6) detects that the stove area is in a burning state and that there is no one guarding the stove area, and when the infrared detection device (6) detects that the oil smoke concentration is greater than or equal to a first preset value, the alarm device is controlled to be turned on.

8. The range hood according to claim 7, characterized in that: The front panel (11) protrudes from the mounting surface of the third mounting plate (14); the range hood further comprises: a first protective cover (7), the first protective cover (7) being arranged on the mounting surface of the third mounting plate (14), the first protective cover (7) and the third mounting plate (14) enclosing a first sealed cavity; the third phased array device (5) and the infrared detection device (6) are both located in the first sealed cavity.

9. The range hood according to claim 2, characterized in that: The first phased array device (3) further comprises: at least one first receiving unit, the first receiving unit being arranged between two adjacent first transmitting units (31) in each of the first transmitting units (31), and the first receiving unit being arranged at intervals from the two adjacent first transmitting units (31); the first receiving unit being used for ultrasonic ranging; Wherein, when the stove area is in an unlit state and the range hood is not in a smoking mode, the first receiving unit performs ultrasonic ranging.

10. The range hood according to claim 3, characterized in that: The second phased array device (4) further comprises: at least one second receiving unit, the second receiving unit being arranged between two adjacent second transmitting units (41) in each of the second transmitting units (41), and the second receiving unit being arranged at intervals from the two adjacent second transmitting units (41); the second receiving unit being used for ultrasonic ranging; Wherein, when the stove area is in an unlit state and the range hood is not in a smoking mode, the second receiving unit performs ultrasonic ranging.

11. The range hood according to claim 1, characterized in that: The front panel (11) is protruding from the first mounting plate (12) and the second mounting plate (13); the range hood further comprises: a second protective cover (8) and a third protective cover (9), the second protective cover (8) and the third protective cover (9) being respectively arranged on the first mounting plate (12) and the second mounting plate (13); the second protective cover (8) and the first mounting plate (12) enclose a second sealed cavity, and the first phased array device (3) is located in the second sealed cavity; the third protective cover (9) and the second mounting plate (13) enclose a third sealed cavity, and the second phased array device (4) is located in the third sealed cavity.

12. A control method, characterized in that: The control method is applied to the range hood according to any one of claims 1 to 11, and the control method comprises: After the range hood is turned on, it is determined whether to execute the smoking mode according to the user's instructions or the current oil smoke concentration; If the range hood is in smoke mode, the smoke level can be adaptively adjusted according to user instructions or current smoke concentration; According to the adjusted smoking gear, at least part of the first phased array device (3) and at least part of the second phased array device (4) are controlled to emit ultrasonic waves.

13. The control method according to claim 12, characterized in that: The first phased array device (3) comprises at least four first emitting units (31), and the at least four first emitting units (31) are arranged at intervals along the width direction of the shell (1); the second phased array device (4) comprises at least four second emitting units (41), and the at least four second emitting units (41) are arranged at intervals along the width direction of the shell (1); if the smoking gear is divided into N gears, N≥2; The method of controlling at least part of the first phased array device (3) and at least part of the second phased array device (4) to emit ultrasonic waves according to the adjusted smoking gear comprises: The number of ultrasonic waves emitted by each of the first emitting units (31) and each of the second emitting units (41) is controlled to be proportional to the smoking gear.

14. The control method according to claim 13, characterized in that: The controlling of the number of ultrasonic waves emitted by each of the first emitting units (31) and each of the second emitting units (41) is proportional to the smoking gear, specifically: If the smoking gear is raised, the number of ultrasonic waves emitted by each of the first emitting units (31) and each of the second emitting units (41) is controlled to increase.

15. The control method according to claim 14, characterized in that: The method of controlling each of the first transmitting units (31) and each of the second transmitting units (41) to increase the number of ultrasonic waves emitted if the smoking gear is raised comprises: If the smoking gear is the first gear, controlling the two first transmitting units (31) of the first phased array device (3) close to the air inlet (110) and the two second transmitting units (41) of the second phased array device (4) close to the air inlet (110) to transmit ultrasonic waves; If the smoking gear is the second gear, the emission quantity of each of the first emission units (31) and each of the second emission units (41) is controlled to be 2+n, where n≥1; The order of opening each of the first transmitting units (31) and each of the second transmitting units (41) is to start from the side close to the air inlet (110) and to open in sequence in a direction away from the air inlet (110); the power of the ultrasonic waves emitted by the first phased array device (3) and the second phased array device (4) is a first preset power.

16. The control method according to claim 12, characterized in that: The control method is applied to the range hood according to claim 4, and the control method further comprises: If the range hood is running in a smoking mode, determining whether to turn on the third phased array device (5) according to the smoking gear; If the smoking gear is at the highest gear, the third phased array device (5) is turned on, so that the first phased array device (3), the second phased array device (4) and the third phased array device (5) all emit ultrasonic waves; Wherein, the power of the ultrasonic wave emitted by the third phased array device (5) is a first preset power.

17. The control method according to claim 16, characterized in that: The third phased array device (5) comprises: at least two third transmitting units (51), each of the third transmitting units (51) being arranged at intervals along a direction from a side of the third mounting plate (14) close to the first mounting plate (12) to a side of the third mounting plate (14) away from the first mounting plate (12); the control method further comprises: When the third phased array device (5) is turned on, the phase difference of the ultrasonic waves is periodically adjusted between the third transmitting units (51), so that within a single cycle, the propagation direction of the combined beam continuously changes from vertically downward to tilted in the direction of the air inlet (110), thereby guiding the oil fume particles to move towards the air inlet (110).

18. The control method according to claim 17, characterized in that: The control method further comprises: If the third phased array device (5) is turned on, detecting whether a user is located below the third phased array device (5); If a user is located below the third phased array device (5), the phase difference of the ultrasonic waves is periodically adjusted between the third transmitting units (51) so that the propagation direction of the combined beam avoids the user.

19. The control method according to claim 13, characterized in that: The first phased array device (3) further comprises: at least one first receiving unit, the first receiving unit being arranged between two adjacent first transmitting units (31) in each of the first transmitting units (31); the second phased array device (4) further comprises: at least one second receiving unit, the second receiving unit being arranged between two adjacent second transmitting units (41) in each of the second transmitting units (41); the control method further comprises: to determine whether the range hood enters the radar mode according to a user instruction or the operation mode of the range hood and the situation of the stove area; If the range hood enters the radar mode, each of the first transmitting units (31) and the second transmitting unit (41) periodically transmits ultrasonic pulses, the first receiving unit performs ultrasonic ranging on the ultrasonic pulses emitted by each of the first transmitting units (31), and the second receiving unit performs ultrasonic ranging on the ultrasonic pulses emitted by each of the second transmitting units (41); to determine whether an animal has entered the stove area according to the result of ultrasonic ranging performed by the first receiving unit and / or the second receiving unit; If so, each of the first transmitting unit (31) and the second transmitting unit (41) transmits ultrasonic waves at a second preset power to drive away the animals.

20. The control method according to claim 19, characterized in that: The method for determining whether the range hood enters the radar mode according to the operation mode of the range hood and the situation of the stove area includes: If the range hood is not in the smoking mode, and the stove area is not in the ignition state within the first preset time, the range hood enters the radar mode.

21. The control method according to claim 13, characterized in that: The control method is applied to the range hood according to claim 7, and the control method further comprises: Detecting whether the stove area is in a ignition state and whether there is a user in the stove area; If the stove area is in a ignition state and there is no user in the stove area, determining whether the current oil smoke concentration is greater than or equal to a first preset value; If the current oil smoke concentration is greater than or equal to the first preset value, the control alarm device is turned on to prompt the user to take action.

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