A range hood and method of discharging cooking fumes

Abstract

The application provides a range hood and a method for discharging oil fume, and belongs to the technical field of kitchen appliances. The range hood comprises a shell, a plurality of air inlets are arranged at the bottom of the shell, a suction device and a rotary driving device are arranged in the shell, and the suction device is hingedly connected in the shell. The rotary driving device drives the suction device to rotate, so that the air suction port of the suction device faces different air inlets. The range hood can adjust the air suction port of the suction device according to the oil fume distribution of different air inlets, can improve the extraction effect of oil fume, and can ensure smooth discharge of oil fume.

Description

Technical Field

[0001] This invention relates to the field of kitchen appliance technology, and in particular to a range hood and a method for exhausting cooking fumes. Background Technology

[0002] As people's living standards improve, kitchen equipment is also constantly being upgraded. Range hoods, as an indispensable piece of equipment in the kitchen, directly affect the comfort of the kitchen environment. However, existing range hoods often suffer from problems such as poor smoke extraction, high noise levels, and difficulty in cleaning. To solve the problem of poor smoke extraction in existing range hoods, manufacturers usually replace the motors with higher-powered ones to drive the fan blades, which increases production costs and noise levels. Existing technology discloses a vortex-type pressurized range hood, which includes a smoke-gathering hood, a blower, and a smoke delivery pipe. A turbocharger is connected to the top of the smoke-gathering hood, and a vortex tube is connected between the turbocharger and the smoke delivery pipe. The blower is installed outside and connected to the turbocharger. The vortex tube is a cone shape, wider at the bottom than the top. This range hood effectively draws the smoke below into the suction pipe and exhausts it outdoors, resulting in excellent smoke extraction.

[0003] However, the range hood's air intake direction is fixed and cannot be changed as needed, nor can it extract fumes from different locations, leaving room for improvement. Summary of the Invention

[0004] To overcome the problems existing in related technologies, one of the objectives of this invention is to provide a range hood that can adjust the air intake of the suction device according to the distribution of oil fumes at different air inlets, thereby improving the oil fume extraction effect and ensuring smooth oil fume discharge.

[0005] A range hood includes a housing with several air inlets at the bottom. The housing contains a suction device and a rotation drive device. The suction device is hinged to the housing. The rotation drive device drives the suction device to rotate so that the suction inlets of the suction device face different air inlets.

[0006] During use, the user can adjust the direction of the air intake of this range hood according to the situation of the stove head corresponding to each air inlet, so that the air intake is facing the stove head with more oil fumes. Therefore, the air intake can directly draw out the oil fumes, which helps to improve the oil fume extraction effect and ensure smooth oil fume discharge.

[0007] In a preferred embodiment of the present invention, the outer shell includes a first shell and a second shell that are interconnected, a connecting section is provided between the first shell and the second shell, and a plurality of air inlets are provided at the bottom of the first shell; the suction device and the rotary drive device are both disposed in the connecting section.

[0008] By using different air inlets in the first housing to correspond to different burners, the suction device can perform targeted fume extraction, thereby improving the efficiency of fume removal.

[0009] In a preferred embodiment of the present invention, the suction device includes an air duct, a fan wheel, and a first motor. The outer wall of the air duct is hinged to the inner wall of the connecting section via a bearing. The fan wheel and the first motor are both fixed in the air duct, and the output end of the first motor is fixedly connected to the fan wheel.

[0010] During the adjustment of the air intake of the suction device, the rotation of the entire air duct drives the impeller and the first motor to rotate. The first motor drives the impeller to rotate, enabling the impeller to draw in the flue gas.

[0011] In a preferred embodiment of the present invention, the rotary drive device includes a handwheel and a connecting rod, the handwheel being fixed to the outer wall of the housing, and the connecting rod being connected between the handwheel and the bearing.

[0012] This embodiment provides a manual adjustment method for the suction device. By rotating the handwheel, the handwheel drives the connecting rod to rotate, which in turn drives the bearing to rotate, thereby adjusting the orientation of the suction port of the suction device.

[0013] In a preferred embodiment of the present invention, the rotary drive device includes a second motor and a transmission shaft. One end of the transmission shaft is fixedly connected to the output end of the second motor, and the other end is fixedly connected to the bearing. The second motor drives the bearing to rotate through the transmission shaft.

[0014] A smoke detector is installed on the air inlet, and the smoke detector is electrically connected to the second motor.

[0015] This application uses a smoke detector to detect the smoke concentration at different air intakes and uses a second motor to drive the suction device to rotate, thereby achieving automatic adjustment of the air intake and making the range hood more convenient to use.

[0016] In a preferred embodiment of the present invention, the air duct includes a first air shell and a second air shell connected to each other. The first air shell is provided with an airflow inlet, and the second air shell is provided with an airflow outlet. The wind turbine is fixed in the first air shell, and the first motor is fixed in the second air shell.

[0017] The outer walls of both the first and second air casings are arc-shaped; along the gas flow direction, the cross-sectional area of ​​the first air casing gradually increases from the airflow inlet to the second air casing, and the cross-sectional area of ​​the second air casing gradually decreases from the first air casing to the airflow outlet.

[0018] In the air duct, along the direction of gas flow, the gas flow area goes through a process of increasing and then decreasing. This air duct design can increase the flow velocity of flue gas in the air duct, so that the flue gas can be discharged more quickly.

[0019] In a preferred embodiment of the present invention, a baffle plate is provided in the second air housing, the baffle plate is located near the airflow outlet, a motor fixing position is provided on the baffle plate, and multiple air passages are provided on the baffle plate.

[0020] The airflow outlet is connected to a smoke exhaust pipe.

[0021] The baffle plate provides a mounting position for the motor, and its design also reduces the flow area of ​​the flue gas at the air outlet, thereby increasing the pressure of the flue gas at that point and increasing its flow rate, allowing the flue gas to enter the exhaust pipe and be discharged more quickly.

[0022] In a preferred embodiment of the present invention, the wind turbine includes a guide ring and a blade hub. The blade hub is disposed on one side of the guide ring, and a blade mounting position is formed between the guide ring and the blade hub. Multiple blades are disposed in the blade mounting position, and the multiple blades are arranged in the blade mounting position along the circumference of the blade hub.

[0023] A connecting plate is provided in the middle of the impeller hub, and the output end of the first motor is fixedly connected to the connecting plate. The connecting plate is provided with multiple air passage holes.

[0024] During the rotation of the impeller, airflow enters through the guide ring, with some airflow exiting radially from the blades along the guide ring, and some airflow entering the downstream of the impeller through the air passages. The airflow exiting radially along the guide ring, under the action of the arc-shaped outer walls of the first and second housings, forms a tornado shape inside the duct, creating stronger suction and effectively improving the smoke extraction efficiency.

[0025] In a preferred embodiment of the present invention, the air suction device is provided with an air outlet, and both the air inlet and the air outlet are provided with filters.

[0026] Filters are used to remove grease and harmful substances from flue gas, improving the cleanliness of the exhaust gas.

[0027] A second objective of this invention is to provide a method for exhausting cooking fumes, implemented using the range hood described above, the method comprising the following steps:

[0028] Obtain the distribution of cooking fumes at different air inlets;

[0029] Adjust the direction of the air intake of the suction device according to the distribution of oil fumes at different air intakes, so that the air intake faces the air inlet with the most oil fumes, and start the suction device to extract the oil fumes.

[0030] The beneficial effects of this invention are as follows:

[0031] This invention provides a range hood comprising a housing with several air inlets at its bottom. A suction device and a rotary drive device are housed within the housing, with the suction device hinged to the housing. The rotary drive device rotates the suction device, directing its air inlets toward different air inlets. During use, the different air inlets of the housing face different burners. Different burners produce different cooking methods and thus different amounts of smoke; for example, burners used for stir-frying produce more smoke. Users can adjust the direction of the suction device's air inlets according to the burner's characteristics, directing them toward the burner producing more smoke. This allows the suction device to directly extract the smoke, improving extraction efficiency and ensuring smooth smoke discharge. Furthermore, the rotatable suction device maximizes smoke extraction even with limited motor power, helping to reduce manufacturing costs and operating noise.

[0032] This application also provides a method for exhausting oil fumes based on the above-mentioned range hood. This method can adjust the orientation of the air intake of the suction device according to the distribution of oil fumes, thereby reducing energy consumption and ensuring the oil fume extraction effect of the range hood. Attached Figure Description

[0033] Figure 1 This is a perspective view of the range hood provided by the present invention;

[0034] Figure 2 This is a perspective view of the interior of the range hood provided by the present invention;

[0035] Figure 3 A schematic diagram of the internal structure of the outer shell provided by this invention;

[0036] Figure 4 This is a schematic diagram of the structure of the suction device provided by the present invention arranged inside the outer shell;

[0037] Figure 5 This is a perspective view of the suction device provided by the present invention;

[0038] Figure 6This is a schematic diagram of the air duct structure provided by the present invention;

[0039] Figure 7 This is a schematic diagram of the structure of the suction device provided by the present invention rotating inside the outer casing;

[0040] Figure 8 This is a schematic diagram of the airflow inside the outer shell provided by the present invention;

[0041] Figure 9 This is a schematic diagram of the rotary drive device provided by the present invention, including a first wheel and a connecting rod;

[0042] Figure 10 This is a schematic diagram of the rotary drive device provided by the present invention, including a second motor and a transmission shaft;

[0043] Figure 11 This is a flowchart of the oil fume exhaust method provided by the present invention.

[0044] Figure label:

[0045] 1. Outer shell; 11. First shell; 111. Air inlet; 112. Filter screen; 12. Connecting section; 13. Second shell; 2. Exhaust pipe; 3. Suction device; 31. Baffle plate; 311. Air outlet; 32. First motor; 33. Air duct; 331. First air casing; 332. Second air casing; 34. Impeller; 341. Guide ring; 342. Blade; 343. Impeller hub; 344. Connecting plate; 345. Air passage hole; 35. Airflow inlet; 36. Airflow outlet; 4. Bearing; 5. Handwheel; 51. Connecting rod; 6. Second motor; 61. Drive shaft; 7. Smoke detector. Detailed Implementation

[0046] Preferred embodiments of the invention will now be described in more detail with reference to the accompanying drawings. While preferred embodiments of the invention are shown in the drawings, it should be understood that the invention can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that the invention will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

[0047] To address the problem of poor fume extraction in existing range hoods, manufacturers typically replace the motors with higher-powered ones to drive the fan blades. This increases production costs and noise levels. Existing technology discloses a vortex-type booster range hood, which includes a fume hood, a blower, and a fume delivery pipe. A turbocharger is connected to the top of the fume hood, and a vortex tube is connected between the turbocharger and the fume delivery pipe. The blower is installed outside and connected to the turbocharger. The vortex tube is a cone shape, wider at the bottom than the top. This range hood effectively draws the fumes from below into the suction pipe and exhausts them outdoors, resulting in good fume extraction. However, the suction direction of this range hood is fixed and cannot be changed as needed, nor can it extract fumes from different locations. Therefore, this application provides a range hood.

[0048] Example 1

[0049] like Figures 1-10 As shown, the range hood provided in this embodiment includes a housing 1. The bottom of the housing 1 has several air inlets 111. The housing 1 contains a suction device 3 and a rotary drive device, with the suction device 3 hinged within the housing 1. The rotary drive device drives the suction device 3 to rotate, causing the suction inlets of the suction device 3 to face different air inlets 111. In practical applications, a filter 112 and an oil-blocking grille are provided at the air inlets 111. The filter 112 removes grease and harmful substances from the fumes, improving the cleanliness of the exhaust fumes. The oil-blocking grille collects the fumes, preventing them from escaping into the kitchen air. The filter 112 can be installed on one side wall of the oil-blocking grille; the combined installation of the filter 112 and the oil-blocking grille enhances the cleaning ability of the kitchen fumes.

[0050] Specifically, the hinge method of this application can be that the suction device 3 is connected to the outer shell 1 via a rotating shaft or via a ball joint. It should be noted that different hinge methods require different rotary drive devices to drive the suction device 3 so that it can rotate at a set angle as needed.

[0051] During use, the different air inlets 111 of the outer casing 1 face different burners. Different burners have different cooking methods and often produce different amounts of smoke; for example, burners used for stir-frying produce more smoke. Users can adjust the direction of the air intake of the suction device 3 according to the situation of each burner, so that the air intake is facing the burner with more smoke. This allows the suction device 3 to directly extract the smoke, which helps to improve the smoke extraction effect and ensure smooth smoke discharge. Moreover, the rotatable suction device 3 can make full use of the smoke extraction effect even when the motor power is limited. This helps to reduce the manufacturing cost of the range hood and reduce the operating noise of the range hood.

[0052] It should be noted that, in addition to the outer casing 1, the suction device 3, and the rotary drive device, the range hood of this application also includes a control system, a display screen, and an operation panel. The display screen and the operation panel are both connected to the control system. The display screen can show the working status of the range hood, and the control panel is used for intelligent control of the range hood.

[0053] Example 2

[0054] like Figures 1-10 As shown, this embodiment includes the aforementioned range hood, which includes a housing 1. The bottom of the housing 1 is provided with a plurality of air inlets 111. The housing 1 is provided with a suction device 3 and a rotary drive device. The suction device 3 is hinged in the housing 1. The rotary drive device drives the suction device 3 to rotate so that the suction port of the suction device 3 faces different air inlets 111.

[0055] In this embodiment, the outer shell 1 includes a first shell 11 and a second shell 13 that are interconnected. A connecting section 12 is provided between the first shell 11 and the second shell 13. A plurality of air inlets 111 are provided at the bottom of the first shell 11. The suction device 3 and the rotary drive device are both disposed in the connecting section 12.

[0056] By using different air inlets 111 of the first housing 11 to correspond to different stove heads, the suction device 3 can perform targeted oil fume extraction, thereby improving the efficiency of oil fume discharge.

[0057] The first housing 11, the second housing 13, and the connecting section 12 of this application can be made of stainless steel or aluminum alloy. The interconnection between the first housing 11, the second housing 13, and the connecting section can be fixed to each other by bolts or welded to form an integral structure of the outer shell 1.

[0058] Example 3

[0059] like Figures 1-10 As shown, this embodiment includes the aforementioned range hood, which includes a housing 1. The bottom of the housing 1 is provided with a plurality of air inlets 111. The housing 1 is provided with a suction device 3 and a rotary drive device. The suction device 3 is hinged in the housing 1. The rotary drive device drives the suction device 3 to rotate so that the suction port of the suction device 3 faces different air inlets 111.

[0060] The outer shell 1 includes a first shell 11 and a second shell 13 that are interconnected. A connecting section 12 is provided between the first shell 11 and the second shell 13. A plurality of air inlets 111 are provided at the bottom of the first shell 11. The suction device 3 and the rotary drive device are both disposed in the connecting section 12.

[0061] In this embodiment, the suction device 3 includes a duct 33, a fan wheel 34, and a first motor 32. The outer wall of the duct 33 is hinged to the inner wall of the connecting section 12 through a bearing 4. The fan wheel 34 and the first motor 32 are both fixed in the duct 33, and the output end of the first motor 32 is fixedly connected to the fan wheel 34.

[0062] The outer wall of the bearing 4 and the outer wall of the air duct 33 are fixed to each other, while the inner ring of the bearing 4 can rotate. The outer wall of the air duct 33 can be set on a rotating shaft that is fixed to the inner ring of the bearing 4, so that the air duct 33 can rotate inside the outer casing 1 through mutual cooperation with the bearing 4.

[0063] During the adjustment of the air intake of the suction device 3, the rotation of the entire air duct 33 drives the impeller 34 and the first motor 32 to rotate, changing the air intake direction of the impeller 34 and thus adjusting the air intake. During the process of sucking up flue gas, the first motor 32 drives the impeller 34 to rotate, enabling the impeller 34 to attract flue gas.

[0064] Example 4

[0065] like Figures 1-10 As shown, this embodiment includes the aforementioned range hood, which includes a housing 1. The bottom of the housing 1 is provided with a plurality of air inlets 111. The housing 1 is provided with a suction device 3 and a rotary drive device. The suction device 3 is hinged in the housing 1. The rotary drive device drives the suction device 3 to rotate so that the suction port of the suction device 3 faces different air inlets 111.

[0066] The outer shell 1 includes a first shell 11 and a second shell 13 that are interconnected. A connecting section 12 is provided between the first shell 11 and the second shell 13. A plurality of air inlets 111 are provided at the bottom of the first shell 11. The suction device 3 and the rotary drive device are both disposed in the connecting section 12.

[0067] The suction device 3 includes a duct 33, a fan wheel 34, and a first motor 32. The outer wall of the duct 33 is hinged to the inner wall of the connecting section 12 through a bearing 4. The fan wheel 34 and the first motor 32 are both fixed in the duct 33, and the output end of the first motor 32 is fixedly connected to the fan wheel 34.

[0068] In this embodiment, the rotary drive device includes a handwheel 5 and a connecting rod 51. The handwheel 5 is fixed to the outer wall of the housing 1, and the connecting rod 51 is connected between the handwheel 5 and the bearing 4.

[0069] like Figure 9As shown, this embodiment provides a manual adjustment method for the suction device 3. By rotating the handwheel 5, the handwheel 5 drives the connecting rod 51 to rotate, thereby driving the bearing 4 to rotate, so as to realize the adjustment of the direction of the suction port of the suction device 3.

[0070] In practical applications, the handwheel 5 should not be positioned too high to avoid inconvenience during adjustment. A swivel wheel can be used for the handwheel 5 to save effort during adjustment. Additionally, one end of the connecting rod 51 can be fixedly connected to the inner ring of the bearing 4, allowing the connecting rod 51 to drive the inner ring of the bearing 4 to rotate, which in turn drives the air duct 33 to rotate.

[0071] More preferably, a damping device can be provided at the connection between the connecting rod 51 and the inner ring of the bearing 4 to maintain a limited angle during the adjustment of the suction device 3. This damping device can be implemented using existing dampers.

[0072] Example 5

[0073] like Figures 1-10 As shown, this embodiment includes the aforementioned range hood, which includes a housing 1. The bottom of the housing 1 is provided with a plurality of air inlets 111. The housing 1 is provided with a suction device 3 and a rotary drive device. The suction device 3 is hinged in the housing 1. The rotary drive device drives the suction device 3 to rotate so that the suction port of the suction device 3 faces different air inlets 111.

[0074] The outer shell 1 includes a first shell 11 and a second shell 13 that are interconnected. A connecting section 12 is provided between the first shell 11 and the second shell 13. A plurality of air inlets 111 are provided at the bottom of the first shell 11. The suction device 3 and the rotary drive device are both disposed in the connecting section 12.

[0075] The suction device 3 includes a duct 33, a fan wheel 34, and a first motor 32. The outer wall of the duct 33 is hinged to the inner wall of the connecting section 12 through a bearing 4. The fan wheel 34 and the first motor 32 are both fixed in the duct 33, and the output end of the first motor 32 is fixedly connected to the fan wheel 34.

[0076] like Figure 10 As shown, in this embodiment, automatic adjustment of the suction device 3 is provided. The rotary drive device includes a second motor 6 and a drive shaft 61. One end of the drive shaft 61 is fixedly connected to the output end of the second motor 6, and the other end is fixedly connected to the bearing 4. The second motor 6 drives the bearing 4 to rotate through the drive shaft 61. A smoke detector 7 is provided on the air inlet 111, and the smoke detector 7 is electrically connected to the second motor 6.

[0077] This application uses a smoke detector 7 to detect the smoke concentration at different air intakes and uses a second motor 6 to drive the suction device 3 to rotate, thereby achieving automatic adjustment of the air intake and making the range hood more convenient to use.

[0078] During operation, the smoke detector 7, once activated, detects the smoke concentration at different air intakes and feeds the data back to the range hood's control system. Based on this data, the control system determines which air intake has the highest smoke concentration and then activates the second motor 6, driving the suction device 3 to rotate so that its intake faces the intake with the highest smoke concentration. Finally, the first motor 32 activates to extract the smoke. Because the intake faces the area with the highest smoke concentration, the range hood can directly extract smoke from the area with the highest smoke concentration, maximizing its effectiveness.

[0079] Example 6

[0080] like Figures 1-10 As shown, this embodiment includes the aforementioned range hood, which includes a housing 1. The bottom of the housing 1 is provided with a plurality of air inlets 111. The housing 1 is provided with a suction device 3 and a rotary drive device. The suction device 3 is hinged in the housing 1. The rotary drive device drives the suction device 3 to rotate so that the suction port of the suction device 3 faces different air inlets 111.

[0081] The outer shell 1 includes a first shell 11 and a second shell 13 that are interconnected. A connecting section 12 is provided between the first shell 11 and the second shell 13. A plurality of air inlets 111 are provided at the bottom of the first shell 11. The suction device 3 and the rotary drive device are both disposed in the connecting section 12.

[0082] The suction device 3 includes a duct 33, a fan wheel 34, and a first motor 32. The outer wall of the duct 33 is hinged to the inner wall of the connecting section 12 through a bearing 4. The fan wheel 34 and the first motor 32 are both fixed in the duct 33, and the output end of the first motor 32 is fixedly connected to the fan wheel 34.

[0083] The rotary drive device includes a second motor 6 and a transmission shaft 61. One end of the transmission shaft 61 is fixedly connected to the output end of the second motor 6, and the other end is fixedly connected to the bearing 4. The second motor 6 drives the bearing 4 to rotate through the transmission shaft 61. A flue gas detector 7 is provided on the air inlet 111, and the flue gas detector 7 is electrically connected to the second motor 6.

[0084] In this embodiment, the air duct 33 includes a first air shell 331 and a second air shell 332 connected to each other. The first air shell 331 is provided with an airflow inlet 35, and the second air shell 332 is provided with an airflow outlet 36. The impeller 34 is fixed in the first air shell 331, and the first motor 32 is fixed in the second air shell 332.

[0085] The outer walls of the first air casing 331 and the second air casing 332 are both arc-shaped; along the gas flow direction, the cross-sectional area of ​​the first air casing 331 gradually increases from the airflow inlet 35 to the second air casing 332, and the cross-sectional area of ​​the second air casing 332 gradually decreases from the first air casing 331 to the airflow outlet 36.

[0086] In the air duct 33, along the direction of gas flow, the gas flow area goes through a process of increasing from small to large and then decreasing from large to small. The design of the air duct 33 can increase the flow velocity of the flue gas in the air duct 33, so that the flue gas can be discharged more quickly.

[0087] The first air casing 331 and the second air casing 332 of this application can be fixed together with bolts, and the use of a split air duct 33 can reduce the assembly difficulty of the suction device 3. The outer wall of the air casing is arc-shaped, which can reduce the friction between the inner wall of the air casing and the airflow and improve the oil fume extraction effect of the suction device 3.

[0088] Example 7

[0089] like Figures 1-10 As shown, this embodiment includes the aforementioned range hood, which includes a housing 1. The bottom of the housing 1 is provided with a plurality of air inlets 111. The housing 1 is provided with a suction device 3 and a rotary drive device. The suction device 3 is hinged in the housing 1. The rotary drive device drives the suction device 3 to rotate so that the suction port of the suction device 3 faces different air inlets 111.

[0090] The outer shell 1 includes a first shell 11 and a second shell 13 that are interconnected. A connecting section 12 is provided between the first shell 11 and the second shell 13. A plurality of air inlets 111 are provided at the bottom of the first shell 11. The suction device 3 and the rotary drive device are both disposed in the connecting section 12.

[0091] The suction device 3 includes a duct 33, a fan wheel 34, and a first motor 32. The outer wall of the duct 33 is hinged to the inner wall of the connecting section 12 through a bearing 4. The fan wheel 34 and the first motor 32 are both fixed in the duct 33, and the output end of the first motor 32 is fixedly connected to the fan wheel 34.

[0092] The rotary drive device includes a second motor 6 and a transmission shaft 61. One end of the transmission shaft 61 is fixedly connected to the output end of the second motor 6, and the other end is fixedly connected to the bearing 4. The second motor 6 drives the bearing 4 to rotate through the transmission shaft 61. A flue gas detector 7 is provided on the air inlet 111, and the flue gas detector 7 is electrically connected to the second motor 6.

[0093] In this embodiment, the air duct 33 includes a first air housing 331 and a second air housing 332 connected to each other. The first air housing 331 is provided with an airflow inlet 35, and the second air housing 332 is provided with an airflow outlet 36. The impeller 34 is fixed in the first air housing 331, and the first motor 32 is fixed in the second air housing 332. The outer walls of both the first air housing 331 and the second air housing 332 are arc-shaped. Along the gas flow direction, the cross-sectional area of ​​the first air housing 331 gradually increases from the airflow inlet 35 towards the second air housing 332, and the cross-sectional area of ​​the second air housing 332 gradually decreases from the first air housing 331 towards the airflow outlet 36.

[0094] In this embodiment, a baffle plate 31 is provided in the second air casing 332. The baffle plate 31 is located near the airflow outlet 36. A motor fixing position is provided on the baffle plate 31. Multiple air passages 311 are provided on the baffle plate 31. The airflow outlet 36 is connected to a smoke exhaust pipe 2.

[0095] The air vents 311 can be evenly distributed on the wind deflector 31 along the circumference of the wind deflector 31.

[0096] The baffle plate 31 provides a mounting position for the motor. On the other hand, the baffle plate 31 reduces the flow area of ​​the flue gas at the airflow outlet 36, thereby increasing the pressure of the flue gas at this point and increasing the flow rate of the flue gas, so that the flue gas can enter the exhaust pipe 2 and be discharged more quickly.

[0097] Example 8

[0098] like Figures 1-10 As shown, this embodiment includes the aforementioned range hood, which includes a housing 1. The bottom of the housing 1 is provided with a plurality of air inlets 111. The housing 1 is provided with a suction device 3 and a rotary drive device. The suction device 3 is hinged in the housing 1. The rotary drive device drives the suction device 3 to rotate so that the suction port of the suction device 3 faces different air inlets 111.

[0099] The outer shell 1 includes a first shell 11 and a second shell 13 that are interconnected. A connecting section 12 is provided between the first shell 11 and the second shell 13. A plurality of air inlets 111 are provided at the bottom of the first shell 11. The suction device 3 and the rotary drive device are both disposed in the connecting section 12.

[0100] The suction device 3 includes a duct 33, a fan wheel 34, and a first motor 32. The outer wall of the duct 33 is hinged to the inner wall of the connecting section 12 through a bearing 4. The fan wheel 34 and the first motor 32 are both fixed in the duct 33, and the output end of the first motor 32 is fixedly connected to the fan wheel 34.

[0101] The rotary drive device includes a second motor 6 and a transmission shaft 61. One end of the transmission shaft 61 is fixedly connected to the output end of the second motor 6, and the other end is fixedly connected to the bearing 4. The second motor 6 drives the bearing 4 to rotate through the transmission shaft 61. A flue gas detector 7 is provided on the air inlet 111, and the flue gas detector 7 is electrically connected to the second motor 6.

[0102] In this embodiment, the air duct 33 includes a first air housing 331 and a second air housing 332 connected to each other. The first air housing 331 is provided with an airflow inlet 35, and the second air housing 332 is provided with an airflow outlet 36. The impeller 34 is fixed in the first air housing 331, and the first motor 32 is fixed in the second air housing 332. The outer walls of both the first air housing 331 and the second air housing 332 are arc-shaped. Along the gas flow direction, the cross-sectional area of ​​the first air housing 331 gradually increases from the airflow inlet 35 towards the second air housing 332, and the cross-sectional area of ​​the second air housing 332 gradually decreases from the first air housing 331 towards the airflow outlet 36.

[0103] A baffle plate 31 is provided in the second air casing 332. The baffle plate 31 is located near the airflow outlet 36. A motor fixing position is provided on the baffle plate 31. Multiple air passages 311 are provided on the baffle plate 31. The airflow outlet 36 is connected to a smoke exhaust pipe 2.

[0104] In this embodiment, the wind turbine 34 includes a guide ring 341 and a blade hub 343. The blade hub 343 is disposed on one side of the guide ring 341, and a blade mounting position is formed between the guide ring 341 and the blade hub 343. Multiple blades 342 are disposed in the blade mounting position, and the multiple blades 342 are arranged in the blade mounting position along the circumference of the blade hub 343.

[0105] A connecting plate 344 is provided in the middle of the impeller hub 343. The output end of the first motor 32 is fixedly connected to the connecting plate 344. A plurality of air passage holes 345 are provided on the connecting plate 344.

[0106] During the rotation of the impeller 34, airflow enters through the guide ring 341, flowing axially along the guide ring 341. After passing the guide ring 341, some airflow exits radially from the blades 342 along the guide ring 341, exhibiting centrifugal diffusion; the remaining airflow continues axially along the guide ring 341, passing through the air passage 345 and entering the downstream of the impeller 34. The centrifugally diffused airflow, under the action of the arc-shaped outer walls of the first housing 11 and the second housing 13, combined with the axial airflow, forms a tornado shape inside the duct 33, creating stronger suction and effectively improving the smoke extraction effect.

[0107] Example 9

[0108] like Figures 1-10 As shown, this embodiment provides a method for exhausting cooking fumes. This method is implemented based on the range hood described above. The range hood includes a housing 1, with several air inlets 111 at the bottom. A suction device 3 and a rotary drive device are disposed within the housing 1. The suction device 3 is hinged within the housing 1. The rotary drive device drives the suction device 3 to rotate, causing the suction inlets of the suction device 3 to face different air inlets 111.

[0109] The outer casing 1 includes a first casing 11 and a second casing 13 that are interconnected. A connecting section 12 is provided between the first casing 11 and the second casing 13. A plurality of air inlets 111 are provided at the bottom of the first casing 11. The suction device 3 and the rotary drive device are both disposed in the connecting section 12. The suction device 3 includes an air duct 33, a fan wheel 34, and a first motor 32. The outer wall of the air duct 33 is hinged to the inner wall of the connecting section 12 through a bearing 4. The fan wheel 34 and the first motor 32 are both fixed in the air duct 33. The output end of the first motor 32 is fixedly connected to the fan wheel 34. The rotary drive device includes a second motor 6 and a drive shaft 61. One end of the drive shaft 61 is fixedly connected to the output end of the second motor 6, and the other end is fixedly connected to the bearing 4. The second motor 6 drives the bearing 4 to rotate through the drive shaft 61. A smoke detector 7 is provided on the air inlet 111, and the smoke detector 7 is electrically connected to the second motor 6.

[0110] The air duct 33 includes a first air housing 331 and a second air housing 332 connected to each other. The first air housing 331 is provided with an airflow inlet 35, and the second air housing 332 is provided with an airflow outlet 36. The impeller 34 is fixed in the first air housing 331, and the first motor 32 is fixed in the second air housing 332. The outer walls of the first air housing 331 and the second air housing 332 are both arc-shaped. Along the gas flow direction, the cross-sectional area of ​​the first air housing 331 gradually increases from the airflow inlet 35 towards the second air housing 332, and the cross-sectional area of ​​the second air housing 332 gradually decreases from the first air housing 331 towards the airflow outlet 36.

[0111] A baffle plate 31 is provided in the second air casing 332. The baffle plate 31 is located near the airflow outlet 36. A motor fixing position is provided on the baffle plate 31. Multiple air passages 311 are provided on the baffle plate 31. The airflow outlet 36 is connected to a smoke exhaust pipe 2.

[0112] See Figure 11 The method for removing cooking fumes includes the following steps:

[0113] S100. Obtain the distribution of oil fumes at different air inlets 111. The method of obtaining the information can be through the smoke detector 7 or by the user making a manual judgment based on the on-site conditions.

[0114] S200. According to the distribution of oil fumes at different air inlets, adjust the direction of the air inlet of the suction device 3 so that the air inlet faces the air inlet 111 with the largest amount of oil fumes, and start the suction device 3 to extract the oil fumes.

[0115] This method can adjust the orientation of the air intake of the suction device 3 according to the distribution of oil fumes, thereby reducing energy consumption and ensuring the oil fume extraction effect of the range hood.

[0116] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0117] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this application.

[0118] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A range hood, comprising a housing (1), characterized in that: The bottom of the outer shell (1) is provided with several air inlets (111). The outer shell (1) is provided with a suction device (3) and a rotary drive device. The suction device (3) is hinged in the outer shell (1). The rotary drive device drives the suction device (3) to rotate so that the suction port of the suction device (3) faces different air inlets (111). The outer shell (1) includes a first shell (11) and a second shell (13) that are interconnected. A connecting section (12) is provided between the first shell (11) and the second shell (13). A plurality of air inlets (111) are provided at the bottom of the first shell (11). The suction device (3) and the rotary drive device are both located in the connecting section (12). The suction device (3) includes a duct (33), a fan (34) and a first motor (32). The outer wall of the duct (33) is hinged to the inner wall of the connecting section (12) through a bearing (4). The fan (34) and the first motor (32) are both fixed in the duct (33). The output end of the first motor (32) is fixedly connected to the fan (34). The air duct (33) includes a first air shell (331) and a second air shell (332) connected to each other. The first air shell (331) is provided with an airflow inlet (35), and the second air shell (332) is provided with an airflow outlet (36). The impeller (34) is fixed in the first air shell (331), and the first motor (32) is fixed in the second air shell (332). Along the gas flow direction, the cross-sectional area of ​​the first wind shell (331) gradually increases from the airflow inlet (35) toward the second wind shell (332), and the cross-sectional area of ​​the second wind shell (332) gradually decreases from the first wind shell (331) toward the airflow outlet (36). A baffle plate (31) is provided in the second air casing (332). The baffle plate (31) is located near the airflow outlet (36). A motor fixing position is provided on the baffle plate (31). A plurality of air passages (311) are provided on the baffle plate (31). The air outlet (36) is connected to a smoke exhaust pipe (2).

2. The range hood according to claim 1, characterized in that: The rotary drive device includes a handwheel (5) and a connecting rod (51). The handwheel (5) fixes the outer wall of the housing (1), and the connecting rod (51) connects the handwheel (5) and the bearing (4).

3. The range hood according to claim 1, characterized in that: The rotary drive device includes a second motor (6) and a transmission shaft (61). One end of the transmission shaft (61) is fixedly connected to the output end of the second motor (6), and the other end is fixedly connected to the bearing (4). The second motor (6) drives the bearing (4) to rotate through the transmission shaft (61). A flue gas detector (7) is provided on the air inlet (111), and the flue gas detector (7) is electrically connected to the second motor (6).

4. The range hood according to claim 1, characterized in that: The wind turbine (34) includes a guide ring (341) and a blade hub (343). The blade hub (343) is disposed on one side of the guide ring (341). A blade mounting position is formed between the guide ring (341) and the blade hub (343). Multiple blades (342) are disposed in the blade mounting position. The multiple blades (342) are arranged in the blade mounting position along the circumference of the blade hub (343). A connecting plate (344) is provided in the middle of the impeller hub (343), and the output end of the first motor (32) is fixedly connected to the connecting plate (344). The connecting plate (344) is provided with a plurality of air passage holes (345).

5. The range hood according to any one of claims 1-4, characterized in that: The suction device (3) is provided with an air outlet, and both the air inlet (111) and the air outlet are provided with filters (112).

6. A method for exhausting cooking fumes, characterized in that: Based on the range hood as described in any one of claims 1-5, the method for exhausting cooking fumes includes the following steps: Obtain the distribution of oil fumes at different air inlets (111); According to the distribution of oil fumes at different air inlets, adjust the direction of the air inlet of the suction device (3) so that the air inlet faces the air inlet (111) with the largest amount of oil fumes, and start the suction device (3) to extract the oil fumes.

Images