A range hood with an electrically operated smoke baffle

Abstract

A range hood with an electrically operated smoke baffle includes a housing. The front opening of the housing provides a smoke inlet. The smoke baffle is mounted on the housing via an electric drive device. The electric drive device includes a hinge seat mounted on one end of the housing and a connecting seat mounted on the back of the smoke baffle. The hinge seat and the connecting seat are connected as a single unit by a drive arm. The upper end of the drive arm is bent and extends out, hinged to the hinge seat, and the lower end of the drive arm is bent and extends, mounted on the connecting seat. The electric drive device also includes a telescopic rod installed inside the housing. The end of the telescopic rod is mounted on the connecting seat. A drive motor drives the telescopic rod to extend or retract, thereby opening and closing the smoke baffle. The advantages of this invention are: utilizing an electrically operated opening and closing structure to achieve the purpose of opening and closing the smoke baffle simplifies transmission components, reduces assembly difficulty, and results in a simple structure. The smoke baffle opens and closes more smoothly and steadily under electric drive, improving user comfort and reliability.

Description

Technical Field

[0001] This utility model relates to the field of range hood technology, specifically a range hood with an electrically operated smoke baffle. Background Technology

[0002] As an essential kitchen appliance, the range hood primarily extracts and removes cooking fumes, maintaining a clean kitchen environment. To improve smoke extraction, the range hood's baffle is designed to open and close. This baffle employs a complex gear transmission system or intricate guide rails for operation, resulting in numerous components. This not only increases the manufacturing difficulty and production cost but also makes assembly more complex, time-consuming, and labor-intensive. Due to its complex structure and numerous interoperable parts, many electric baffles are not smooth and stable during operation, easily generating friction noise and gear meshing noise during opening and closing, thus reducing the user experience. The baffle may also vibrate or jam during opening or closing, or even fail to accurately position itself when stopping, affecting the overall aesthetics and user experience. Furthermore, some electric mechanisms are located far from the baffle, leading to low transmission efficiency and directly causing slow opening or closing speeds, failing to respond quickly to user commands. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of existing technologies and provide a range hood with a smoke baffle that is simple in structure, low in manufacturing cost, smooth and stable in movement, effectively improves the smoke collection effect and smoke extraction efficiency, provides physical protection for the electric drive device to extend its service life, and ensures long-term stable operation.

[0004] The purpose of this utility model is achieved by the following method: a range hood with an electrically operated smoke baffle, comprising a housing, wherein the front end opening of the housing is provided with a smoke inlet, and a smoke baffle is connected to and covers the outside of the smoke inlet. The smoke baffle is mounted on the housing by an electric drive device, the electric drive device comprising a hinge seat mounted on one end of the housing and a connecting seat mounted on the back of the smoke baffle, the hinge seat and the connecting seat being connected as one unit by a drive arm; the upper end of the drive arm is bent and extends out and hinged to the hinge seat, and the lower end of the drive arm is bent and extended and mounted on the connecting seat; the electric drive device also... The device includes a telescopic rod installed inside the housing, with its end mounted on a connecting seat. A drive motor extends or retracts the telescopic rod to open and close the smoke baffle. Smoke gathering plates are fixedly installed on both sides of the smoke baffle. Hole-avoiding grooves are provided through the housing body on both sides of the smoke inlet, and the smoke gathering plates are movably installed in the hole-avoiding grooves. A concave smoke guiding area is provided inside the smoke inlet, with an air inlet at the bottom of the smoke guiding area. An oil filter screen is provided at the air inlet. A secondary suction port is also provided at the top of the smoke guiding area, located near the junction of the smoke baffle and the housing.

[0005] Two sets of the electric drive device are provided, symmetrically distributed and installed on both sides of the housing.

[0006] Only one set of the electric drive device is provided, which is installed on one side of the housing.

[0007] The drive arm includes an upper connecting plate with a bent protrusion at the upper end and a lower connecting plate with a bent protrusion at the lower end, and a groove is formed between the upper connecting plate and the lower connecting plate.

[0008] The upper connecting plate has a limiting boss protruding from the side facing the groove. Correspondingly, the hinge seat has a retaining plate bent on its side, and the limiting boss is installed on the inner side wall of the retaining plate.

[0009] The outer end of the telescopic rod is provided with a hinge seat, which is hinged to the connecting seat.

[0010] The drive motor is a geared motor.

[0011] The housing is provided with a surrounding plate, and an oil-separating cavity is formed between the surrounding plate and the housing. The electric drive device is installed in the oil-separating cavity.

[0012] The beneficial effects of this utility model are: 1. Simple structure, low manufacturing cost, and improved market competitiveness.

[0013] 2. The smoke baffle is opened and closed by an electric opening and closing structure, which simplifies the transmission parts, reduces the assembly difficulty, and has a simple structure. The smoke baffle opens and closes more smoothly and steadily under electric drive, improving the comfort and reliability of user operation.

[0014] 3. The dual smoke inlets enhance smoke collection and extraction efficiency, effectively solving the problem of oil fume diffusion and significantly improving the extraction effect.

[0015] 4. An oil-separating chamber is installed to physically protect the electric drive unit, preventing it from being exposed to oily environments, significantly extending its service life, and ensuring the stability and reliability of the electric drive unit. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the smoke baffle in the closed state of this utility model.

[0017] Figure 2 This is a schematic diagram of the smoke baffle in the open state of this utility model.

[0018] Figure 3 This is a schematic diagram of the internal structure of the smoke baffle in this utility model.

[0019] Figure 4 This is a schematic diagram of the installation state of the electric drive device in this utility model.

[0020] Figure 5This is an exploded view of the smoke baffle and the shell in this utility model.

[0021] Figure 6 This is a schematic diagram showing the installation position of the electric drive device in this utility model.

[0022] Figure 7 This is a schematic diagram of the electric drive device in this utility model.

[0023] Figure 8 This is an exploded view of the electric drive device in this utility model. Detailed Implementation

[0024] The present invention will be further described in detail below with reference to the accompanying drawings. A range hood with an electrically operated smoke baffle includes a housing 1. The front opening of the housing 1 has a smoke inlet, and a smoke baffle 2 covers and connects to the outside of the smoke inlet. The smoke baffle 2 is mounted on the housing 1 via an electric drive device 3. The electric drive device 3 includes a hinge seat 31 mounted on one end of the housing 1 and a connecting seat 32 mounted on the back of the smoke baffle 2. The hinge seat 31 and the connecting seat 32 are connected as one unit by a drive arm 33. The upper end of the drive arm 33 is bent and extends out to hinge to the hinge seat 31, and the lower end of the drive arm 33 is bent and extends to be mounted on the connecting seat 32. The electric drive device 3 also includes components mounted on the housing... 1. An internal telescopic rod 34 is installed at the end of the telescopic rod 34 on the connecting seat 32. The drive motor 35 drives the telescopic rod 34 to extend or retract, thereby opening and closing the smoke baffle 2. Smoke gathering plates 4 are fixedly installed on both sides of the smoke baffle 2. A clearance groove 10 is provided through the body of the housing 1 on both sides of the smoke inlet. The smoke gathering plate 4 is movably installed in the clearance groove 10. A concave smoke guiding area is provided in the smoke inlet. An air inlet is opened at the bottom of the smoke guiding area. An oil filter screen 5 is covered at the air inlet. A secondary suction port 6 is also provided at the top of the smoke guiding area. The secondary suction port 6 is located near the junction of the smoke baffle 2 and the housing 1.

[0025] like Figure 1 , Figure 2 , Figure 3 As shown: In this range hood structure, the front opening of the shell is provided with a smoke inlet, and the smoke baffle is installed on the shell through an electric drive device, which realizes the opening and closing function of the smoke baffle.

[0026] When the user needs to open the smoke baffle, the drive motor starts, driving the telescopic rod of the electric drive device to extend. The telescopic rod connects to the connecting seat installed on the back of the smoke baffle. It should be noted that a hinge seat is installed on the back of the housing. The hinge seat and the connecting seat are connected as one unit via a drive arm. The upper end of the drive arm bends and extends to hinge with the hinge seat, while the lower end bends and extends to connect with the connecting seat. The thrust of the drive motor on the telescopic rod acts directly on the connecting seat. Through the connection between the connecting seat and the drive arm, the smoke baffle moves downward. Simultaneously, the drive arm rotates around the hinge seat, causing the smoke baffle to open. During the opening process of the smoke baffle, the smoke-gathering plates installed on both sides of the smoke baffle slide freely in the clearance grooves on both sides of the smoke inlet as the smoke baffle opens or closes, ensuring the smooth opening and closing of the smoke baffle without obstruction. At the same time, the smoke-gathering plates continuously form a smoke-gathering chamber, effectively preventing the diffusion of oil fumes. Working together with the smoke baffle, they improve the smoke extraction effect.

[0027] To further enhance smoke extraction efficiency, a recessed smoke-guiding zone is incorporated within the smoke inlet. An air inlet is located at the bottom of this zone, covered by an oil filter. The smoke-guiding zone directs incoming fumes, drawing them in through the inlet and subjecting them to initial filtration by the oil filter. Simultaneously, a secondary suction inlet is located at the top of this zone, near the junction of the baffle plate and the casing. This secondary inlet assists in drawing in escaping fumes, minimizing their escape and significantly improving smoke extraction efficiency and kitchen hygiene. This dual-smoke inlet structure, with both the main and secondary inlets, creates a more efficient and comprehensive smoke extraction path compared to a traditional single-smoke inlet, effectively addressing the issue of smoke diffusion.

[0028] Compared to manual opening and closing or complex traditional mechanisms, this utility model achieves electric opening and closing through a simple structure of motor, telescopic rod, and drive arm, making it easier for users to operate and more intelligent.

[0029] Two sets of electric drive devices 3 are symmetrically distributed and installed on both sides of the housing 1. These two sets of electric drive devices work together. When the drive motor starts, the telescopic rods on both sides extend or retract synchronously, simultaneously driving the drive arms on both sides to open and close the smoke baffle. The symmetrical arrangement of two sets provides a more even pushing and pulling force to the smoke baffle, avoiding uneven force, swaying, or twisting that may occur with unilateral drive, making the opening and closing process of the smoke baffle smoother and more reliable. Furthermore, the dual-drive system can distribute the weight and running resistance of the smoke baffle, providing more abundant driving force for larger and heavier smoke baffles, ensuring smooth opening and closing and stronger load-bearing capacity. Even if one set of electric drive devices fails, the other set can still maintain the movement of the smoke baffle to a certain extent, ensuring the normal operation of the range hood.

[0030] Only one set of the electric drive device 3 is provided, installed on one side of the housing 1. The electric drive device, installed on one side of the housing, drives the telescopic rod to extend or retract via a drive motor, directly causing the entire smoke baffle to open and close. The other side of the smoke baffle is kept balanced by appropriate guidance or support, significantly reducing the number of parts and assembly complexity, lowering manufacturing costs, and better aligning with the pursuit of economy and simplicity. It occupies less space, providing more room for other components, and is suitable for lighter and smaller smoke baffles, achieving product lightweighting while meeting the basic functional requirements of the range hood.

[0031] The drive arm 33 includes an upper connecting plate 331 with a bent and protruding upper end and a lower connecting plate with a bent and protruding lower end, and a groove 333 is formed between the upper connecting plate 331 and the lower connecting plate.

[0032] like Figure 7 , Figure 8 As shown: In this case, the drive arm includes an upper connecting plate with a bent protrusion at the top and a lower connecting plate with a bent protrusion at the bottom, with a recess forming a groove between the two connecting plates. The upper connecting plate is hinged to the hinge seat, and the lower connecting plate is connected to the connecting seat. This integrated design enhances the overall strength of the drive arm without adding extra materials. The groove allows the drive arm to provide clearance for other components during movement, enabling a compact arrangement of parts, optimizing the utilization of the internal space of the range hood, and avoiding interference with other components.

[0033] The upper connecting plate 331 has a limiting boss 334 protruding from the side facing the groove 333. Correspondingly, the hinge seat 31 has a retaining plate 311 bent on the side. The limiting boss 334 is installed on the inner side wall of the retaining plate 311.

[0034] like Figure 7 , Figure 8 As shown: A limiting boss is provided on the side of the upper connecting plate facing the groove. Corresponding to the position of the limiting boss, a retaining plate is bent on the side of the hinge seat. During the opening and closing movement of the smoke baffle, the limiting boss on the drive arm slides on the inner wall of the retaining plate. When the smoke baffle moves to the preset opening and closing limit position, the limiting boss will press against the retaining plate, thereby limiting the further rotation of the drive arm and ensuring that the smoke baffle can accurately stop at the fully open or fully closed position. This prevents the smoke baffle from over-opening or closing and provides a reliable mechanical limit function for the opening and closing movement of the smoke baffle. It ensures that the smoke baffle can accurately stop at the preset open and closed position every time, avoiding positioning errors that may exist in the motor or sensor, and enhancing the stability and safety of the smoke baffle movement.

[0035] The outer end of the telescopic rod 34 is provided with a hinge seat 341, which is hingedly installed with the connecting seat 32. Figure 5 As shown, a hinged seat and a connecting seat are installed on the telescopic rod for hinged installation. During the opening and closing movement of the smoke baffle, the force of the telescopic rod pushing the connecting seat is linear, while the movement trajectory of the connecting seat and the drive arm is arc-shaped. Through the hinge, the telescopic rod can adapt to the angle changes during the movement of the smoke baffle, avoiding stress concentration that may occur with rigid connections, thereby effectively protecting the telescopic rod and the connecting seat and extending the service life of the components. Secondly, the hinge makes the pushing operation of the telescopic rod smoother, further improving the operational stability of the smoke baffle.

[0036] The drive motor 35 is a geared motor. The opening and closing of the smoke baffle requires a certain driving force. A geared motor is a device that integrates a motor and a reducer. The motor's output shaft is connected to the reducer's input end. Through gear transmission, the high speed of the motor is converted to a lower speed, while significantly increasing the output torque. This allows for stable driving of the telescopic rod, overcoming the weight and movement resistance of the smoke baffle, ensuring that the smoke baffle opens and closes more smoothly and powerfully even when encountering resistance. Simultaneously, the low-speed movement makes it easier for users to achieve precise position control of the smoke baffle. Compared to traditional pure motor control, geared motors maintain lower noise levels during operation, improving the user experience and increasing the energy efficiency of the entire drive system.

[0037] A surrounding plate 7 is provided inside the housing 1, forming an oil-separating cavity between the surrounding plate 7 and the housing 1. The electric drive device 3 is installed inside this oil-separating cavity. Figure 6 As shown: To protect the electric drive unit, a surrounding plate is installed inside the housing. This surrounding plate, together with the housing body, forms a relatively sealed oil-separating cavity, within which the electric drive unit is installed. The oil-separating cavity directly isolates the electric drive unit from oil fumes and other contaminants, forming an effective physical barrier. This fundamentally solves the problems of oil buildup and corrosion on precision components such as the electric drive unit, preventing malfunctions such as short circuits and mechanical jamming caused by oil contamination. This significantly extends the service life of the electric drive unit and even the entire range hood, substantially improving the reliability and stability of the electric drive unit and ensuring its operation in a clean environment. Furthermore, because the electric drive unit is effectively protected, users do not need to perform frequent cleaning and maintenance, enhancing user convenience.

[0038] In summary: When the range hood is turned on, the drive motor and geared motor of the electric drive unit start working, driving the telescopic rod to extend slowly and smoothly. Because the outer end of the telescopic rod is hinged to the connecting seat installed on the back of the smoke baffle via its own hinge seat, it ensures that while the telescopic rod moves linearly, it can flexibly adapt to the arc movement of the connecting seat. The extension of the telescopic rod generates a direct thrust on the connecting seat, which connects to the lower connecting plate of the drive arm. The upper connecting plate of the drive arm is hinged to the hinge seat installed inside the housing, allowing the drive arm to rotate around its hinge point. With the combined action of the drive arm and the telescopic rod, the smoke baffle moves slowly outward from the closed state until it is fully open. During the opening and closing process of the smoke baffle, the smoke collecting plates installed on both sides of the smoke baffle slide freely in the clearance grooves on both sides of the smoke inlet, ensuring not only the smooth movement of the smoke baffle but also forming a smoke collecting chamber with the smoke baffle after opening, enhancing the collection of oil fumes and improving the smoke extraction effect.

[0039] Furthermore, a smoke guide zone is set in the smoke inlet, with an air inlet at the bottom and a secondary suction port at the top. The dual suction ports can more effectively draw in any escaping fumes, ensuring that all banquet food in the smoke guide zone is completely removed, thus improving the overall smoke extraction efficiency.

[0040] To protect the electric drive unit, a surrounding plate is installed inside the housing. This surrounding plate, together with the housing body, forms a relatively sealed oil-separating cavity, within which the electric drive unit is installed. The oil-separating cavity directly isolates the electric drive unit from oil fumes and other contaminants, forming an effective physical barrier. This fundamentally solves the problems of oil buildup and corrosion on precision components such as the electric drive unit, significantly extending the service life of the electric drive unit and even the entire range hood. It also significantly improves the reliability and stability of the electric drive unit, ensuring it operates in a clean environment.

[0041] When the range hood is not in use, the drive motor and geared motor rotate in reverse, driving the telescopic rod to retract and move the baffle plate inward along the opposite path until it is completely closed, covering the smoke inlet. This serves to prevent dust, improve aesthetics, and save space, and therefore can be widely used.

[0042] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification 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.

Claims

1. A range hood with an electrically operated smoke baffle, comprising a housing (1), wherein the front end opening of the housing (1) is provided with a smoke inlet, and a smoke baffle (2) is connected to and covers the outside of the smoke inlet, the smoke baffle (2) being installed on the housing (1) by an electric drive device (3), characterized in that: The electric drive device (3) includes a hinge seat (31) installed at one end of the housing (1) and a connecting seat (32) installed on the back of the smoke baffle (2). The hinge seat (31) and the connecting seat (32) are connected as one unit by a drive arm (33). The upper end of the drive arm (33) is bent and extended to be hinged to the hinge seat (31), and the lower end of the drive arm (33) is bent and extended to be installed on the connecting seat (32). The electric drive device (3) also includes a telescopic rod (34) installed inside the housing (1). The end of the telescopic rod (34) is installed on the connecting seat (32). The drive motor (35) drives the telescopic rod (34) to extend or retract, thereby opening and closing the smoke baffle (2). Smoke-gathering plates (4) are fixedly installed on both sides of the smoke baffle (2), and air-avoiding grooves (10) are provided on both sides of the smoke inlet through the body of the housing (1). The smoke-gathering plates (4) are movably installed in the air-avoiding grooves (10). The smoke inlet is provided with a concave smoke guiding area, and an air inlet is provided at the bottom of the smoke guiding area. An oil filter screen (5) is provided at the air inlet. A secondary suction port (6) is also provided at the top of the smoke guiding area. The secondary suction port (6) is located near the junction of the smoke baffle (2) and the shell (1).

2. The electrically opened and closed range hood with a smoke baffle according to claim 1, characterized in that: The electric drive device (3) is provided in two sets, which are symmetrically distributed and installed on both sides of the housing (1).

3. The electrically operated oil fume exhaust machine with a smoke baffle according to claim 1, characterized in that: Only one set of the electric drive device (3) is provided, which is installed on one side of the housing (1).

4. The electrically operated oil fume exhaust machine with a smoke baffle according to claim 1, characterized in that: The drive arm (33) includes an upper connecting plate (331) with a bent protrusion at the upper end and a lower connecting plate with a bent protrusion at the lower end, and a groove (333) is formed between the upper connecting plate (331) and the lower connecting plate.

5. The electrically operated smoke extractor with a smoke baffle according to claim 4, characterized in that: The upper connecting plate (331) is provided with a limiting boss (334) protruding towards the groove (333). Correspondingly, the hinge seat (31) is provided with a retaining plate (311) bent on the side. The limiting boss (334) is installed on the inner wall of the retaining plate (311).

6. The electrically operated oil fume exhaust machine with a smoke baffle according to claim 1, characterized in that: The outer end of the telescopic rod (34) is provided with a hinge seat (341), and the hinge seat (341) is hinged to the connecting seat (32).

7. The electrically operated oil fume exhaust machine with a smoke baffle according to claim 1, characterized in that: The drive motor (35) is a geared motor.

8. A range hood with an electrically operated smoke baffle as described in claim 1, characterized in that: The housing (1) is provided with a surrounding plate (7), and an oil-separating cavity is formed between the surrounding plate (7) and the housing (1). The electric drive device (3) is installed in the oil-separating cavity.

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