Kitchen range hood

Abstract

The utility model discloses a kitchen range hood, which comprises an air suction and exhaust port, a range hood outer shell, a double-air-duct fan, an oil throwing spoke and a rotating wing, an oil throwing spoke shell is arranged in the range hood outer shell, the oil throwing spoke is arranged in the oil throwing spoke shell at the air suction port of the range hood, and the rotating wing is arranged in the oil throwing spoke shell. The double-air-duct draught fan is of a double-air-duct structure with an inner air duct and an outer air duct, fan blades of the double-air-duct draught fan face an outer air duct air inlet guide-in opening formed in the outer air duct, an outer air duct shell of the double-air-duct draught fan is connected to the upper portion of the oil throwing spoke shell, and after air is output by the double-air-duct draught fan, airflow is located in an exhaust cavity channel where the air suction and exhaust port is located. And rotating fin plates are connected to the two sides of the range hood outer shell correspondingly. The oil fume interception treatment capacity can be effectively achieved, the phenomenon that oil fume escapes from the two sides of the range hood can be avoided, an existing static collision filtering mode is set to be a dynamic filtering mode, and the kitchen oil fume interception treatment effect can be improved. The structure is simple and the use experience is good.

Description

Technical Field

[0001] This utility model relates to a kitchen range hood, and more particularly to a kitchen exhaust range hood used in the kitchen to extract and intercept kitchen fumes. Background Technology

[0002] Kitchen range hoods have become commonplace in households, helping people reduce or avoid the harm or pollution caused by kitchen fumes. However, most existing range hoods rely on filters to filter oil, water, and fumes, a static collision filtration method with poor filtration efficiency. The fan's main function is to draw in and exhaust fumes, which is a direct exhaust method with weak fume interception capabilities. Fumes can still escape from the sides and front of the range hood, especially when food is added to hot oil, where the amount of fumes rushing upwards is significant, making escape from the sides and front even more severe. This hinders effective fume interception and results in a poor user experience.

[0003] Patent No. ZL202420598791.1, published on November 26, 2024, discloses a range hood, relating to the field of kitchen appliance technology, addressing the problem of inconvenient oil cup disassembly in related technologies. This range hood includes a housing, an oil cup, and a mounting component. The housing has a smoke collection chamber, within which the oil cup is located. The mounting component is disposed within the smoke collection chamber, covering the oil cup and detachably connected to it. The housing also has a detachable opening, allowing the oil cup to enter or exit the smoke collection chamber, enabling installation or separation of the oil cup from the mounting component. The oil cup's mounting on the component prevents fumes from being directly blown onto it when entering the smoke collection chamber, thus reducing grease buildup on its surface. Furthermore, because the oil cup is located inside the housing, fumes adhere less to its surface during prolonged cooking. Therefore, users are less affected by grease when removing the oil cup by touching its surface, improving the user experience. However, this range hood still relies on a static filtration method. Utility Model Content

[0004] This invention addresses the shortcomings of existing kitchen range hoods, which rely on static collision filtration, resulting in weak fume interception and processing capabilities. Fumes can escape from the sides or even the front of the range hood, hindering effective fume interception and providing a poor user experience. The invention replaces the existing static collision filtration method with a dynamic filtration method, significantly improving fume interception and processing. This results in a simple structure and a superior user experience for the kitchen range hood.

[0005] The specific technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: a kitchen range hood, including an exhaust port, a range hood shell, and oil-slinging spokes, characterized in that: it also includes a dual-duct fan and rotating blades, the dual-duct fan having a dual-duct structure with an inner duct and an outer duct, the fan blades of the dual-duct fan being positioned at the air inlet of the outer duct, the dual-duct fan being positioned above the oil-slinging spokes, and the airflow after the dual-duct fan is exhausted is within the exhaust cavity where the exhaust port is located, the oil-slinging spokes... Rotating fins are connected to both sides of the range hood's outer casing at the bottom. When the range hood starts working, the rotating fins simultaneously flip downwards and outwards, positioning themselves on both sides of the lower end of the casing. This prevents kitchen fumes from escaping from the sides of the casing, improving the effectiveness of fume interception. When the range hood stops working, the rotating fins flip inwards and upwards, covering the grease trap area, effectively preventing backflow of air from the range hood and the formation of odors, as well as preventing foreign objects from entering the room. It also provides effective dust protection for the range hood. The dual-duct design effectively improves the stability of the dual-duct axial flow fan, effectively reduces noise during operation, and increases the efficiency of fume interception. It effectively achieves fume purification while preventing fumes from escaping from the sides of the range hood, thus improving the overall fume purification effect. The simple structure enhances the user experience. It effectively improves and ensures the stable operation of the dual-duct axial flow fan, preventing kitchen fumes from escaping from both sides of the oil-spraying spokes and improving the effectiveness of fume purification; it also effectively reduces the operating noise of the range hood and improves the range hood's efficiency in purifying kitchen fumes.

[0006] Preferably, the dual-duct fan includes a fan housing, an inner duct, an outer duct, a motor, and fan blades. An inner shell is housed within the fan housing, forming an inner cavity that is the inner duct. The motor is fixedly connected to the inner duct and drives the fan blades. The cavity between the outer wall of the inner shell and the inner wall of the fan housing forms the outer duct. The fan blades are positioned between the lower part of the motor and the upper part of the oil-slinging spokes, coaxially mounted with the blade tips pointing towards the air inlet of the outer duct. The outer edge of the oil-slinging spokes is located within the area covered by the fan housing. This effectively reduces the operating noise of the dual-duct axial flow fan and the range hood, and improves the efficiency of the range hood in intercepting and treating kitchen fumes.

[0007] Preferably, an oil collection chamber is provided on the lower side of the oil-slinging spoke housing, with the outer edge of the oil-slinging spoke positioned at the inlet of the oil collection chamber, meaning the outer edge of the oil-slinging spoke extends into the oil collection chamber. This improves the simplicity, reliability, and effectiveness of collecting, summarizing, and exporting oil droplets or liquid droplets thrown out by the oil-slinging spoke.

[0008] Preferably, the outer circumference of the outer wall of the oil collection chamber is larger than the outer circumference of the outer wall of the fan housing connected to it. This improves the simplicity, reliability, and effectiveness of collecting, summarizing, and discharging oil droplets or liquid droplets thrown out by the oil-throwing spokes. It also improves the reliability and effectiveness of airflow discharge after oil fume interception and treatment.

[0009] Preferably, the dual-duct blower is equipped with a drip pipe. The drip pipe extends from the blower casing to a position above the oil-slinging spoke area, and is used to introduce cleaning fluid into the oil-slinging spoke area for cleaning. Introducing cleaning fluid enables automatic cleaning, improving the simplicity, reliability, and effectiveness of cleaning the oil-slinging spokes.

[0010] Preferably, the oil collection chamber has a drain outlet at the bottom, and a drain connection pipe is connected to the drain outlet. This improves the simplicity and effectiveness of collecting and discharging oil droplets or liquid droplets after the range hood has intercepted and treated kitchen fumes.

[0011] Preferably, multiple support plates are provided between the outer wall of the inner shell and the inner wall of the fan outer shell, supporting and connecting the inner shell and the fan outer shell. The support plates extend from bottom to top, dividing the external air duct into multiple external air duct channels. This improves the stability, reliability, and effectiveness of the installation support for the inner and outer shells, and enhances the operational stability and airflow discharge stability of the dual-duct fan.

[0012] Preferably, the range hood housing is equipped with an intelligent baffle at the front. The intelligent baffle includes a human body sensor, a lifting device, and a baffle. The human body sensor triggers the lifting device, which drives the connected baffle. When a human body approaches, the lifting device triggers the baffle to rise.

[0013] Preferably, the rotating fin plate includes a rotating baffle, a rotating shaft, and a drive motor. The drive motor drives the rotating shaft, which in turn connects to the rotating baffle. The drive motor is a type of motor capable of both forward and reverse rotation, and its power supply is synchronized with the range hood's power supply. This improves the structural simplicity and effectiveness of the rotating fin plate.

[0014] Preferably, a plasma purification processor is installed above the dual-duct fan, and the plasma purification processor is located within the exhaust duct where the intake and exhaust ports are located. This improves the oil fume purification efficiency of the kitchen range hood.

[0015] Preferably, the oil collecting chamber has an inclined outer wall structure that slopes downwards and outwards, and an inclined inner wall structure that is parallel to the inclined outer wall. This allows oil droplets thrown from the oil-slinging spokes to collide with the inclined inner wall at a small angle before flowing into the oil collecting chamber, thus overcoming the shortcomings of oil droplets thrown from the oil-slinging spokes colliding vertically and splashing, and being carried out of the outlet by the airflow.

[0016] The beneficial effects of this utility model are: it transforms the existing static collision filtration method into a dynamic filtration method, utilizing the high-speed rotation of the oil-slinging spokes to intercept and capture oil and water droplets in the oil and water fumes using centrifugal force and Coriolis force. After capture, the oil and water droplets are thrown into the oil collection chamber, thus achieving dynamic interception. This effectively intercepts and treats the oil and water contained in the oil and water fumes; it effectively achieves the oil fume interception and treatment capacity, and the rotating fins can prevent oil fumes from escaping from both sides of the range hood, which is conducive to improving the oil fume interception and treatment effect in the kitchen. The structure is simple, and the introduction of cleaning liquid can also achieve automatic cleaning, improving the user experience. The dual-duct design of the fan effectively improves and ensures the stable operation of the dual-duct axial flow fan, effectively reduces the operating noise of the dual-duct axial flow fan and the range hood, reduces turbulence and flow generated between the blade tips and the casing, ensures smooth airflow, minimizes fan noise, prevents kitchen fumes from escaping from both sides of the oil-spraying spokes, and improves the effectiveness of fume purification. It also enhances the range hood's efficiency in purifying kitchen fumes. When the range hood stops working, the rotating fins flip inward and upward to cover the oil-spraying spokes' intake and exhaust areas, effectively preventing backflow of air from the range hood into the room and preventing foreign objects from entering the room, while also providing effective dust protection for the range hood. Attached image description:

[0017] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0018] Figure 1 This is a structural schematic diagram of the kitchen exhaust range hood of this utility model.

[0019] Figure 2 This is a schematic diagram of the structure of the dual-duct fan in the kitchen range hood of this utility model.

[0020] Figure 3 This is a schematic diagram of the electrical structure of the kitchen exhaust range hood of this utility model. Detailed Implementation

[0021] Figure 1 , Figure 2 In the illustrated embodiment, a kitchen range hood includes an exhaust port 03, a range hood housing 01, and a housing 04 with oil-spraying spokes. It also includes a dual-duct fan 02 and rotating fins. The dual-duct fan 02 has an inner duct 21 and an outer duct 11. The fan blades 40 of the dual-duct fan 02 face the outer duct air inlet 112, with the blade tips positioned at the outer duct air inlet. The dual-duct fan 02 and the outer duct housing are mounted above the housing 04 with oil-spraying spokes. After the dual-duct fan 02 exits, the airflow is within the exhaust chamber of the exhaust port 03. Rotating fins are connected to both sides of the range hood housing 01. When the range hood starts working, the rotating fins simultaneously flip downwards and outwards, positioned on both sides of the lower end of the range hood housing 01 (see...). Figure 2 (As indicated by arrow B) When the range hood stops working, the rotating fins flip inward and upward to cover the area of ​​the oil-slinging spokes and exhaust vents (see...). Figure 2(Indicated by arrow B). The dual-duct fan 02 includes a fan housing 10, an inner duct 21, an outer duct 11, a motor 30, a fan blade 40, and a liquid collection chamber 13. An inner housing 20 is installed inside the fan housing 10, forming the inner cavity duct 21. The motor 30 is installed and fixedly connected within the inner duct 21. The motor 30 drives the upper section 31 and lower section 33 of the output shaft to drive the fan blade 40 and the oil-throwing spokes 50. The fan blade 40 and the oil-throwing spokes 50 are coaxially mounted, and the diameter of the oil-throwing spokes 50 is larger than the diameter of the fan blade 40. The cavity space between the outer wall of body 20 and the inner wall of the fan housing 10 forms an outer air duct 11. The fan blade 40 is installed between the lower part of the motor 30 and the upper part of the oil-throwing spoke 50. The tip of the fan blade 40 faces the air inlet 112 of the outer air duct 11. The outer edge 51 of the oil-throwing spoke is located inside the area covered by the fan housing 10. Alternatively, in addition to the above-mentioned dual-duct fan 02 technical solution, the axial flow fan solution in the applicant's previously filed patent application 2025102627970, "Axial Flow Fan and Anti-collision Method to Avoid Airflow Collision with the Inner Wall of the Housing," can also be used. The fan housing 10 extends downward and has an oil collection chamber groove 13 on the outer side of the outer end of the oil-throwing spoke. The outer edge 51 of the oil-throwing spoke is located in the groove inlet of the oil collection chamber groove 13, that is, the outer edge 51 of the oil-throwing spoke extends into the oil collection chamber groove 13. A plasma purification processor 60 is installed and connected above the dual-duct fan 02, and the plasma purification processor 60 is located in the exhaust duct where the intake and exhaust ports 03 are located. The plasma purification processor can adopt or borrow existing plasma purification processor technology to further improve the oil fume purification efficiency of the range hood after passing through the oil-slinging spokes. The outer circumference of the outer wall surface 12 of the oil collection chamber 13 is larger than the outer circumference of the outer wall of the fan housing 10 connected above it. A drip pipe 15 is installed and connected to the dual-duct fan 02. The drip pipe 15 extends from the fan housing 10 to the area above the oil-slinging spokes 50, and is used to introduce cleaning fluid into the area above the oil-slinging spokes 50 for cleaning fluid input. When cleaning the oil-slinging spokes, the cleaning fluid can be introduced into the area above the oil-slinging spokes 50. This allows for automatic addition of cleaning fluid to the oil-slinging spokes while the oil-slinging spokes 50 are rotating at high speed, resulting in a cleaner and more effective cleaning. The oil collection chamber 13 has a drain port 16 at the bottom, connected to a drain connection pipe. Through the drain port and its drain connection pipe, the oil droplets or cleaning fluid collected in the oil collection chamber can be effectively collected and drained into a designated removable receiving box or a temporarily placed receiving device. Multiple support plates 22 are installed between the outer wall of the inner shell 20 and the inner wall of the fan outer shell 10, supporting and connecting the inner shell 20 and the fan outer shell 10. The support plates 22 extend from bottom to top, dividing the external air duct 11 into multiple external air duct channels 111.

[0022] An operation panel 091 and a smart baffle 09 are installed and connected to the front of the range hood housing 10. The smart baffle 09 includes a human body sensor, a lifting device, and a baffle. The human body sensor triggers the lifting device, which drives the baffle. When a person approaches, the lifting device triggers the baffle to rise. The operation panel 091 is equipped with a control circuit 093 and an indicator light 092. The rotating fin plate includes a rotating baffle 05, a rotating shaft 08, and a drive motor 07. The drive motor 07 drives the rotating shaft 08, which is connected to the rotating baffle 05. The drive motor is a type of motor that can rotate in both directions. The power supply of the drive motor is synchronized with the power supply of the range hood. The rotation drive control of the rotating fin plate can be found in [reference needed]. Figure 3 The circuit diagram shown is an electrical schematic. Of course, the rotation drive structure and drive circuit of the rotating fin plate can also adopt or borrow other existing drive structures that allow the plate to rotate and flip, as long as they can satisfy the function of rotating the baffle to open or rotating the cover. The oil collecting chamber 13 has an inclined outer wall groove 12 structure that slopes downwards and outwards, and the inner wall 14 of the oil collecting chamber 13 has an inclined inner wall groove structure parallel to its inclined outer wall. The intelligent baffle 09 and the up-and-down lifting drive control can be referred to... Figure 3 The circuit diagram shown is shown. The range hood housing 01 is equipped with a liquid inlet 011, and the inner end of the liquid inlet 011 is connected to the drip tube 15.

[0023] When the range hood is started, the rotating baffles 05 on both sides of the range hood housing simultaneously activate, flip downwards, and are positioned on both sides of the lower end of the range hood housing 01 (see...). Figure 2 (As indicated by arrow B), to prevent kitchen fumes from escaping from both sides of the casing, thus improving the effectiveness of fume interception and treatment; fumes rise from bottom to top (see... Figure 1 As indicated by arrow A, the oil fumes are flung into the oil collection chamber by the oil-throwing spokes. Simultaneously, the fan blades 40 of the dual-duct fan 02, driven by the motor 30, rotate at high speed, further drawing the oil fumes upwards from the oil-throwing spokes 50 into the inner duct 21. At the same time, the tips of the fan blades 40 of the dual-duct fan 02, facing the air inlet 112 of the outer duct 11, guide any leakage and turbulent flow that may form between the airflow at the blade tips and the inner wall of the fan casing into the outer duct, and then out of the dual-duct axial flow fan output port. This effectively improves the stability of the dual-duct axial flow fan's operation, effectively reduces the noise of the dual-duct axial flow fan and the range hood, and improves the range hood's efficiency in intercepting and treating kitchen fumes. When the range hood stops working, the rotating fins flip inwards and upwards to cover the oil-throwing spoke suction and exhaust area (see...). Figure 2 As shown by arrow B, this effectively prevents air from the range hood from flowing back into the room and causing odors, as well as foreign objects from entering the room, and also provides effective dust protection for the range hood.

[0024] In the description of the positional relationship in this utility model, terms such as "inner", "outer", "upper", "lower", "left", and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0025] The above content and structure describe the basic principles, main features, and advantages of this utility model, which should be understood by those skilled in the art. The examples and descriptions above are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A kitchen range hood, comprising an intake and exhaust port and a range hood housing, characterized in that: It also includes a dual-duct fan, oil-slinging spokes, and rotating blades. The oil-slinging spoke housing is set inside the range hood casing, and the oil-slinging spokes are set in the oil-slinging spoke housing at the air intake of the range hood. The dual-duct fan has a dual-duct structure with an inner duct and an outer duct. The fan blades of the dual-duct fan are set at the air intake of the outer duct. The dual-duct fan and the outer duct housing are connected above the oil-slinging spoke housing, and the airflow after the dual-duct fan is discharged is in the exhaust duct where the air intake and exhaust ports are located. Rotating blades are connected to both sides of the range hood casing. When the range hood is started, the rotating blades flip down and outward and are set on both sides of the lower end of the range hood casing. When the range hood is stopped, the rotating blades flip inward and upward to cover the air intake area of ​​the oil-slinging spokes.

2. The kitchen range hood according to claim 1, characterized in that: The lower side of the oil-slinging spoke housing is provided with an oil collection cavity groove, and the outer edge of the oil-slinging spoke is located at the groove inlet of the oil collection cavity groove, that is, the outer edge of the oil-slinging spoke extends into the oil collection cavity groove; the outer circumference of the outer wall of the oil collection cavity groove is larger than the outer circumference of the outer wall of the fan housing connected above it.

3. The kitchen range hood according to claim 1, characterized in that: The dual-duct fan includes a fan housing, an inner duct, an outer duct, a motor, and fan blades. An inner shell is installed inside the fan housing, and the inner cavity formed by the inner shell is the inner duct. The motor is connected and fixed inside the inner duct and drives the fan blades. The cavity space between the outer wall of the inner shell and the inner wall of the fan housing forms the outer duct. The fan blades are located between the lower part of the motor and the upper part of the oil-slinging spokes. The fan blades and the oil-slinging spokes are coaxially installed. The tips of the fan blades face the air inlet of the outer duct, and the outer edge of the oil-slinging spokes is inside the area covered by the fan housing.

4. The kitchen range hood according to claim 1, characterized in that: The rotating fin plate includes a rotating baffle, a rotating shaft, and a drive motor. The drive motor drives the rotating shaft, which is connected to the rotating baffle. The drive motor is a type of drive motor that can rotate in both directions. The power supply of the drive motor is synchronized with the power supply of the range hood.

5. The kitchen range hood according to claim 1, characterized in that: The dual-duct fan is equipped with a drip pipe. The drip pipe is introduced from the fan housing and extends to the position above the oil-slinging spoke area. The drip pipe is used to introduce cleaning fluid into the oil-slinging spoke area for cleaning.

6. The kitchen range hood according to claim 2, characterized in that: The oil collecting chamber has a drain outlet at the bottom, and a drain connection pipe is connected to the drain outlet.

7. The kitchen range hood according to claim 3, characterized in that: Multiple support plates are provided between the outer wall of the inner shell and the inner wall of the fan shell to support and connect the inner shell and the fan shell. The support plates extend from bottom to top and divide the external air duct into multiple external air duct channels.

8. The kitchen range hood according to claim 1, characterized in that: The range hood housing is equipped with an intelligent baffle at the front. The intelligent baffle includes a human body sensor, a lifting device, and a baffle. The human body sensor triggers the lifting device, which drives the baffle. When a human body approaches, the lifting device triggers the baffle to rise.

9. The kitchen range hood according to claim 1, characterized in that: The dual-duct fan is equipped with a plasma purification processor above it, and the plasma purification processor is located in the exhaust duct where the intake and exhaust ports are located.

10. The kitchen range hood according to claim 2, characterized in that: The oil collecting chamber has an inclined outer wall structure that slopes downward and outward, and the inner wall of the oil collecting chamber has an inclined inner wall structure that is parallel to its inclined outer wall. The outer edge of the oil-throwing spoke corresponds to the inclined inner wall surface in the horizontal direction.

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