Smoke deflector opening and closing structure of ceiling type range hood

Abstract

A smoke deflector opening and closing structure of a ceiling type range hood comprises a machine body, a smoke suction opening is formed in the bottom of the machine body, the two sides of the front end of a smoke deflector are movably installed in front of the smoke suction opening through a connecting structure, the two sides of the rear end of the smoke deflector are installed behind the smoke suction opening through a connecting rod device, and the connecting rod device comprises an upper hinged support connected to the rear side of the smoke suction opening. The lower hinged supports are connected to the two sides of the rear end of the smoke deflector, and the front connecting rod and the rear connecting rod stretch across the two hinged supports and are hinged. The upper end of the front connecting rod is hinged to the front end of the upper hinged support, and the lower end is hinged to the front end of the lower hinged support. The smoke deflector has the advantages that the connecting rod devices are arranged on the two sides of the rear end of the smoke deflector, the smoke deflector achieves the opening movement track of first translation and then downward swinging, an oil collecting groove is effectively avoided, interference is avoided, opening or cleaning and maintaining of the smoke deflector can be achieved without disassembling the oil collecting groove, and cleaning and maintaining operation is simplified.

Description

Technical Field

[0001] The invention relates to the technical field of range hoods, in particular to an opening and closing structure of a smoke guide plate of a top-suction range hood. Background Art

[0002] Traditional ceiling-type range hoods usually include a smoke guide plate that is fixed or has a limited opening and closing angle, and an oil collection tank is installed below the smoke guide plate. Since the oil collection tank is usually installed below the smoke guide plate, when the user needs to clean the smoke guide plate or the oil collection tank, it is often necessary to disassemble the oil collection tank first. This disassembly process is usually cumbersome and requires the use of tools. It is not only time-consuming and labor-intensive, but also increases the difficulty of operation for the user. Especially for users who are not familiar with the disassembly steps, it may even damage the range hood components. After cleaning is completed, the oil collection tank needs to be reinstalled in place, which further increases the complexity of maintenance. This inconvenience greatly reduces the frequency of daily cleaning by users, resulting in long-term accumulation of oil smoke and oil stains, which not only affects the appearance and service life of the range hood, but is also likely to breed bacteria, affect the kitchen hygiene environment, and reduce the service life of the range hood. Summary of the Invention

[0003] The purpose of the present invention is to overcome the shortcomings of the existing technology and provide a top-suction range hood smoke guide plate opening and closing structure with a simple structure and low production cost. The smoke guide plate first moves horizontally and then swings downward, effectively avoiding the oil collection tank to avoid interference, facilitating daily cleaning and maintenance, ensuring cleanliness and hygiene, and extending the service life.

[0004] The object of the present invention is achieved in the following way: a smoke guide plate opening and closing structure for a top-suction range hood, comprising a body, a smoke outlet opened at the bottom of the body, the front ends of the smoke guide plate are movably mounted in front of the smoke outlet via a connecting structure, the rear ends of the smoke guide plate are mounted on the rear of the smoke outlet via a connecting rod device, the connecting rod device comprises an upper hinge seat connected to the rear side of the smoke outlet, and a lower hinge seat connected to the rear ends of the smoke guide plate, and also comprises a front connecting rod and a rear connecting rod hinged across the two hinge seats; the upper end of the front connecting rod is hinged to the front end of the upper hinge seat, and the lower end thereof is hinged to the front end of the lower hinge seat; the upper end of the rear connecting rod is hinged to the rear end of the upper hinge seat, and the lower end thereof is hinged to the driving arm protruding at the rear end of the lower hinge seat.

[0005] The driving arm is arranged to extend forward in an inclined manner.

[0006] The cross-sectional height of the front connecting rod is greater than the cross-sectional height of the rear connecting rod.

[0007] The upper hinge seat is distributed in a U-shaped pattern and includes a top plate and side plates. The top plate is fixedly mounted on the machine body. The front connecting rod and the rear connecting rod are hinged to the lower portion of the side plates. The bottom of the side plates is recessed into a limiting groove.

[0008] A connecting plate is installed on the rear end protrusion of the back of the smoke guide plate, and the lower hinge seat is connected to the connecting plate.

[0009] The connecting structure includes a lock seat installed on both sides of the front end of the smoking port and a mounting seat installed on both sides of the front end of the smoke guide plate. The bottom of the lock seat is recessed with a movable groove, and the plug formed by the protrusion on the top of the mounting seat is inserted into the movable groove.

[0010] Connecting grooves are hollowed out between the two sides of the movable groove and the lock seat body, and a locking platform is installed inside the connecting groove. The locking platform extends into the movable groove and presses on the end surface of the plug plate to lock the smoke guide plate closed.

[0011] The locking platform is recessed to form a spring groove, and the spring is sleeved in the spring groove. One end of the spring presses against the bottom of the spring groove, and the other end extends out of the spring groove and presses against the inner wall of the connecting groove. The spring generates a thrust, pushing the locking platform inward and pressing against the plug plate, locking the smoke guide plate in a closed state.

[0012] A card platform is obliquely provided at the bottom of the movable slot, and correspondingly, a card slot is recessed at the inner end of the inserting plate, and the card slot is engaged with the card platform.

[0013] The beneficial effects of the present invention are: 1. Simple structure, low production cost and improved market competitiveness.

[0014] 2. The connecting rod device is set on both sides of the rear end of the smoke guide plate. The smoke guide plate realizes an opening motion trajectory of first moving horizontally and then swinging downward, effectively avoiding the oil collecting tank to avoid interference. The smoke guide plate can be opened or cleaned and maintained without removing the oil collecting tank, which simplifies the cleaning and maintenance operations and significantly improves the convenience of daily maintenance of the range hood.

[0015] 3. The connecting rod device adopts a four-link structure with a compact structure. The coordinated movement between the connecting rods ensures that the opening and closing process of the smoke guide plate is smooth, and the opening and closing structure of the smoke guide plate is stable and reliable.

[0016] 4. It is convenient for users to clean the inside of the range hood, keep the inside of the range hood clean and sanitary, improve the user experience, and extend the service life of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the smoke guide plate in the present invention in the open state.

[0018] Figure 2 For the present invention Figure 1 Enlarged view of point A.

[0019] Figure 3 Schematic diagram of the closed state of the smoke guide plate in the present invention.

[0020] Figure 4 This is a schematic diagram of the internal structure of the hidden part of the body of the present invention.

[0021] Figure 5 Schematic diagram of the structure of the connecting rod device in the present invention.

[0022] Figure 6 2 is a structural exploded view of the connecting rod device in the present invention.

[0023] Figure 7 It is a cross-sectional view of the lock seat in the present invention.

[0024] Figure 8 It is a cross-sectional view of the lock seat in the present invention. DETAILED DESCRIPTION

[0025] The present invention is further described below in detail with reference to the accompanying drawings. A top-suction range hood smoke deflector opening and closing structure comprises a housing 1, wherein a smoke inlet 11 is defined at the bottom of the housing 1, a smoke deflector 2 having two front ends movably mounted in front of the smoke inlet 11 via a connecting structure 4, and two rear ends movably mounted behind the smoke inlet 11 via a connecting rod device 3. The connecting rod device 3 comprises an upper hinge seat 31 connected to the inner side of the smoke inlet 11, and a lower hinge seat 32 connected to two rear ends of the smoke deflector 2, and further comprises a front connecting rod 33 and a rear connecting rod 34 hingedly connected across the two hinge seats; the upper end of the front connecting rod 33 is hinged to the front end of the upper hinge seat 31, and the lower end thereof is hinged to the front end of the lower hinge seat 32; the upper end of the rear connecting rod 34 is hinged to the rear end of the upper hinge seat 31, and the lower end thereof is hinged to a driving arm 321 protruding from the rear end of the lower hinge seat 32.

[0026] like Figure 1 、 Figure 2 、 Figure 3 、 Figure 4As shown: In the smoke deflector opening and closing structure of this top-suction range hood, the front ends of the smoke deflector are movably mounted in front of the smoke outlet via a connecting structure, while the rear ends of the smoke deflector are mounted behind the smoke outlet via a linkage mechanism. The linkage mechanism comprises an upper hinge fixedly mounted behind the smoke outlet and lower hinges fixedly mounted on either side of the rear end of the smoke deflector. The two hinges are articulated across the top and bottom hinges via a front link and a rear link. The upper hinge serves as a fixed hinge point, while the lower hinge serves as a movable hinge point, forming a four-bar linkage. To open the smoke deflector, the user pulls down, separating the front end of the smoke deflector from the range hood via the connecting structure. At this point, a force acts on the driving arm of the lower hinge, pushing the rear link forward. This swinging motion of the rear link synchronizes with the rearward swing of the front link, driving the lower hinge. During the initial swing of the smoke deflector, it is forced to perform a forward translation motion, effectively clearing the upper end of the smoke deflector from the oil sump, preventing interference with the oil sump. At this time, the user continues to open the smoke guide plate. Once the smoke guide plate moves horizontally to avoid the oil collecting tank position, the smoke guide plate will swing downward to open until it is fully opened. The use of a connecting rod device allows the smoke guide plate to achieve a compound motion trajectory of first moving horizontally and then swinging during the reopening and closing process. The user does not need to disassemble the oil collecting tank when opening the smoke guide plate, which significantly simplifies cleaning and maintenance, and improves the convenience of daily maintenance of the range hood. Secondly, the connecting rod device not only realizes complex compound motion, but also has a compact structure and occupies little space, which contributes to the overall integration of the range hood. During the actual opening and closing process, the coordinated movement between the connecting rods ensures the smoothness and stability of the opening and closing action of the smoke guide plate, avoiding the problems of jamming or unevenness that may occur in the existing technology.

[0027] The driving arm 321 is arranged to extend forward in an inclined manner. Figure 5 As shown in the figure: the forward tilted extension design of the driving arm can more effectively transmit the external driving force to the rear connecting rod. When the smoke deflector is in the closed state, the driving arm is in a better initial position, providing a more favorable point of action and lever arm for the opening action of the smoke deflector, thereby ensuring the smoothness of the opening action, optimizing the driving force transmission efficiency and the transmission direction and lever arm of the driving force, and making the opening action of the smoke deflector more labor-saving and smooth.

[0028] The cross-sectional height of the front link 33 is greater than the cross-sectional height of the rear link 34. Figure 5 As shown: During the traditional opening and closing process of the smoke deflector, the front link will be subjected to greater pressure than the rear link. By increasing the cross-sectional height of the front link, the structural strength and rigidity of the front link can be effectively improved, and the deformation effect of the external pressure on the front link can be reduced. The accuracy, stability and reliability of the movement trajectory of the smoke deflector are ensured, thereby effectively extending the service life of the connecting rod device.

[0029] The upper hinge seat 31 is distributed in a 7 shape, including a top plate 311 and a side plate 312. The top plate 311 is fixedly installed on the body 1; the front connecting rod 33 and the rear connecting rod 34 are hinged to the lower part of the side plate 312, and the bottom of the side plate 312 is recessed into a limiting groove 313.

[0030] like Figure 5 、 Figure 6 As shown: the internal structure of the upper hinge seat includes a top plate and side plates distributed in a 7-shape, wherein the top plate is fixedly mounted on the body, providing a stable fixed base for the entire connecting rod device. The side plates extend downward, and the front and rear connecting rods are hinged at the lower part of the side plates, providing sufficient space for the front and rear connecting rods to move, ensuring that the two connecting rods will not interfere with the upper hinge seat or other components during movement, and ensuring the movement accuracy and movement trajectory of the connecting rod device. This time, a limiting groove is recessed in the bottom of the side plate. When the smoke guide plate is opened or closed to the preset maximum angle, the limiting groove is pressed against the components of the connecting rod device or other mating components, thereby limiting the connecting rod device and preventing the excessive opening and closing of the smoke guide plate, effectively protecting the connecting rod device and the smoke guide plate body from damage, and extending the service life.

[0031] The back end of the smoke guide plate 2 is provided with a connecting plate 21, and the lower hinge seat 32 is connected to the connecting plate 21. Figure 6 As shown: A connecting plate is installed on the rear end of the back of the smoke guide plate, and the lower hinge seat is installed and connected to this connecting plate, rather than directly connecting the lower hinge seat to the smoke guide plate body. The design of the connecting plate can better disperse the connection stress between the lower hinge seat and the smoke guide plate, preventing stress concentration and damage to the smoke guide plate. At the same time, the raised connecting plate can also enhance the structural strength of the local rear end of the smoke guide plate, better able to withstand the driving force transmitted by the connecting rod device, and the connection is more stable. Furthermore, the indirect connection method facilitates the installation and removal of the lower hinge seat, as well as the adjustment of the position of the lower hinge seat, simplifying the assembly process.

[0032] The connecting structure 4 includes a lock seat 41 installed on both sides of the front end of the smoking port 11 and a mounting seat 42 installed on both sides of the front end of the smoke guide plate 2. The bottom of the lock seat 41 is recessed with a movable groove 411, and the top of the mounting seat 42 is formed with a protruding plug 421 inserted into the movable groove 411. Figure 4 、 Figure 6 As shown: The connection structure includes lock seats fixedly installed on both sides of the front end of the smoking port, and mounting seats installed on both sides of the front end of the smoke guide plate. The movable groove recessed at the bottom of the lock seat and the plug plate protruding at the top of the mounting seat are used for plugging and installation to preliminarily fix the front end position of the smoke guide plate, ensure that the smoke guide plate is stable and firm when closed, avoid accidental opening causing the smoke guide plate to fall, and have high safety.

[0033] Connecting grooves 412 are hollowed out between the two sides of the movable groove 411 and the body of the lock seat 41. A locking platform 5 is installed inside the connecting groove 412. The locking platform 5 extends into the movable groove 411 and presses on the end surface of the plug plate 421 to lock the smoke guide plate 2 closed.

[0034] like Figure 7 、 Figure 8 As shown: Connecting grooves are hollowed out between the two sides of the movable groove and the lock base body, and a locking platform is installed inside the connecting groove. When the smoke deflector is closed, the insert plate is inserted into the movable groove. At this time, the locking platform extends into the movable groove and presses against the end face of the insert plate, securely fixing the insert plate in the movable groove, thereby locking the smoke deflector and ensuring the closed state of the smoke deflector. This effectively prevents the smoke deflector from accidentally opening when the range hood is operating or vibrating, improving the stability and safety of the smoke deflector and ensuring user safety.

[0035] The locking platform 5 is recessed to form a spring groove 51, and the spring is sleeved in the spring groove 51. One end of the spring 6 is pressed against the bottom of the spring groove 51, and the other end extends out of the spring groove 51 and presses against the inner wall of the connecting groove 412. The spring 6 generates a thrust, pushing the locking platform 5 inward and pressing against the insert plate 421, locking the smoke guide plate 2 in a closed state.

[0036] like Figure 8 As shown: A spring is installed inside the lock platform, with one end of the spring pressing against the bottom of the spring groove of the lock platform, and the other end pressing against the inner wall of the connecting groove. Since the spring itself has a preload, the spring will generate a certain thrust, always pushing the lock platform inward to press against the end face of the plug plate. The lock platform always keeps the plug plate locked, thereby reliably ensuring the closed state of the smoke guide plate and realizing the self-locking function of the smoke guide plate. No additional operation is required by the user, and the locking is reliable and stable. When the smoke guide plate needs to be opened, the smoke guide plate is pulled. The external pulling force overcomes the thrust of the spring, causing the lock platform to detach from the plug plate, realizing the unlocking of the smoke guide plate, which is easy to operate.

[0037] A latching platform 413 is obliquely provided at the bottom of the movable slot 411 , and correspondingly, a latching slot 422 is recessed at the inner end of the inserting plate 421 , and the latching slot 422 is engaged with the latching platform 413 .

[0038] like Figure 6 、 Figure 7As shown: To further strengthen the locking of the smoke deflector, a latching platform is installed at an angle at the bottom of the movable groove. A latching slot is formed at the inner end of the insert plate, corresponding to the position of the latching platform. When the smoke deflector is closed, the insert plate is inserted into the movable groove, and the latching slot and latching platform cooperate to lock. When the smoke deflector is fully closed, the latching structure can provide additional effective mechanical limit, further enhancing the stability of the smoke deflector in the closed state and effectively preventing the smoke deflector from shaking or accidentally falling off. The inclined latching structure helps the insert plate slide in smoothly and automatically lock, improving the convenience of operation when closing the smoke deflector and ensuring the complete closure of the smoke deflector with high security.

[0039] To sum up: in the opening and closing structure of the smoke guide plate, the front end of the smoke guide plate is movably installed in front of the smoking port through a connecting structure, while the rear end of the smoke guide plate is installed behind the smoking port through a connecting rod device. When the user needs to open the smoke guide plate, the smoke guide plate is pulled down to force the lock seat in the connecting structure to separate from the mounting seat. At this time, the front end of the smoke guide plate is separated from the smoking port. During the initial opening of the smoke guide plate, the smoke guide plate does not rotate directly downward as traditionally, but first performs a forward translation movement through the connecting rod device. This translation movement enables the end face of the smoke guide plate to avoid the oil collecting tank located below the smoke guide plate. When the smoke guide plate is separated from the space above the oil collecting tank, the smoke guide plate continues to swing downward until it opens to the preset maximum angle. The compound motion trajectory of first translation and then swinging solves the problem of the existing smoke guide plate needing to disassemble the oil collecting tank during cleaning and maintenance, significantly improves the cleaning and maintenance of the smoke guide plate, and improves user convenience. Among them, the cross-sectional height of the front connecting rod is greater than that of the rear connecting rod, which ensures the strength and stability of the connecting rod mechanism; and the 7-shaped design and limit groove of the upper hinge seat ensure stable installation and movement limitation.

[0040] When the user needs to close the smoke deflector, the smoke deflector swings up, and the insert plate of the front mounting seat of the smoke deflector is inserted into the movable groove of the lock seat. At this time, the spring thrust of the lock base automatically extends and presses against the end face of the insert plate, thereby automatically locking the front end of the smoke deflector and ensuring the stability of the smoke deflector in the closed state. Secondly, the matching buckle between the inclined clamping plate at the bottom of the movable groove and the clamping slot at the inner end of the insert plate provides additional mechanical limit and fixation for the smoke deflector, further enhancing the stability of the closed state and effectively preventing the smoke deflector from accidentally opening when the range hood is working or vibrating, so it can be widely promoted and used.

[0041] The basic principles, main features and advantages of the present invention are shown and described above. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and modifications fall within the scope of the invention as claimed.

Claims

1. A smoke guide plate opening and closing structure for a top-suction range hood, comprising a body (1), a smoke outlet (11) being provided at the bottom of the body (1), two front ends of the smoke guide plate (2) being movably mounted in front of the smoke outlet (11) via a connecting structure (4), and two rear ends of the smoke guide plate (2) being mounted on the rear of the smoke outlet (11) via a connecting rod device (3), characterized in that: The connecting rod device (3) includes an upper hinge seat (31) connected to the rear side of the smoking port (11), and a lower hinge seat (32) connected to both sides of the rear end of the smoke guide plate (2), and also includes a front connecting rod (33) and a rear connecting rod (34) hinged across the two hinge seats; the upper end of the front connecting rod (33) is hinged to the front end of the upper hinge seat (31), and the lower end is hinged to the front end of the lower hinge seat (32); the upper end of the rear connecting rod (34) is hinged to the rear end of the upper hinge seat (31), and the lower end is hinged to a driving arm (321) provided on the rear end of the lower hinge seat (32).

2. The smoke guide plate opening and closing structure of a top-suction range hood according to claim 1, characterized in that: The driving arm (321) is arranged to extend forward in an inclined manner.

3. The smoke guide plate opening and closing structure of a top-suction range hood according to claim 1, characterized in that: The cross-sectional height of the front connecting rod (33) is greater than the cross-sectional height of the rear connecting rod (34).

4. The smoke guide plate opening and closing structure of a top-suction range hood according to claim 1, characterized in that: The upper hinge seat (31) is arranged in a 7-shaped pattern and includes a top plate (311) and side plates (312). The top plate (311) is fixedly mounted on the machine body (1). The front connecting rod (33) and the rear connecting rod (34) are hinged to the lower portion of the side plate (312). The bottom of the side plate (312) is recessed into a limiting groove (313).

5. The smoke guide plate opening and closing structure of a top-suction range hood according to claim 1, characterized in that: A connecting plate (21) is mounted on the rear end protrusion of the back of the smoke guide plate (2), and the lower hinge seat (32) is connected to the connecting plate (21).

6. The smoke guide plate opening and closing structure of a top-suction range hood according to claim 1, characterized in that: The connecting structure (4) comprises a lock seat (41) mounted on both sides of the front end of the smoking port (11) and a mounting seat (42) mounted on both sides of the front end of the smoke guide plate (2). The bottom of the lock seat (41) is recessed to form a movable groove (411), and a plug plate (421) formed as a protrusion on the top of the mounting seat (42) is inserted into the movable groove (411).

7. The smoke guide plate opening and closing structure of a top-suction range hood according to claim 6, characterized in that: Connecting grooves (412) are hollowed out between the two sides of the movable groove (411) and the body of the lock seat (41). A locking platform (5) is installed inside the connecting groove (412). The locking platform (5) extends into the movable groove (411) and presses against the end surface of the plug plate (421), locking the smoke guide plate (2) to close.

8. The smoke guide plate opening and closing structure of a top-suction range hood according to claim 7, characterized in that: The locking platform (5) is recessed to form a spring groove (51), and a spring is sleeved in the spring groove (51). One end of the spring (6) presses against the bottom of the spring groove (51), and the other end extends out of the spring groove (51) and presses against the inner wall of the connecting groove (412). The spring (6) generates a thrust, pushing the locking platform (5) inward and pressing against the plug plate (421), thereby locking the smoke guide plate (2) in a closed state.

9. The smoke guide plate opening and closing structure of a top-suction range hood according to claim 7, characterized in that: A card platform (413) is obliquely provided at the bottom of the movable slot (411), and correspondingly, a card slot (422) is formed in a recessed manner at the inner end of the inserting plate (421), and the card slot (422) is engaged with the card platform (413) in a buckle manner.

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