Telescopic smoke baffle and extractor hood

Abstract

This application relates to a telescopic smoke-blocking device and a range hood, which can reduce the cross-sectional width of the smoke collection chamber while ensuring smoke extraction effect, so as to meet the ultra-thin design requirements of the range hood. The telescopic smoke-blocking device includes: a smoke-blocking plate body, which is rotatably disposed on the front side of the smoke collection chamber to open or close the smoke inlet; and a flow guide assembly, which is telescopically disposed on the inner side of the smoke-blocking plate body, so as to switch between an extended state and a retracted state as the smoke-blocking plate body flips up and down; when the smoke-blocking plate body flips upward to open the smoke inlet, the flow guide assembly extends relative to the smoke-blocking plate body to be in the extended state, and a flow guide hood with a triangular cross-section is formed on the inner side of the smoke-blocking plate body; when the smoke-blocking plate body flips downward to close the smoke inlet, the flow guide assembly retracts relative to the smoke-blocking plate body to be in the retracted state, for being housed within the smoke collection chamber.

Description

Technical Field

[0001] This invention relates to the field of range hood technology, and in particular to a telescopic smoke-blocking device and a range hood. Background Technology

[0002] As people's living standards improve, range hoods have become an indispensable kitchen appliance in modern homes. They are usually installed above the kitchen stove and use the principle of fluid dynamics to extract the fumes generated during cooking and use a filter to filter out some of the grease particles, thereby purifying the kitchen environment and improving people's comfort while cooking.

[0003] To expand the smoke collection area, traditional range hoods typically use a flip-up baffle. However, the area created by the upward-flipping baffle is far from the smoke source, resulting in higher negative pressure and ultimately unsatisfactory smoke extraction. Furthermore, the gap between the top edge of the baffle and the range hood casing due to the flipping mechanism allows some smoke to escape as it enters the collection chamber. This leads to a buildup of grease at the bottom of the fan housing, reducing smoke extraction efficiency and impacting the user experience. To address this, the applicant has installed an L-shaped guide hood on the inner wall of the baffle. This not only lowers the negative pressure area during operation to improve smoke extraction but also alters the smoke's flow path, ensuring that only a small portion of the smoke rises to the gap as it enters the collection chamber, thus minimizing smoke escape.

[0004] However, when a range hood is not in use, it uses a baffle plate to seal the smoke inlet and places the L-shaped baffle inside the smoke collection chamber to reduce space occupation and improve the overall aesthetics. At the same time, in order to ensure a certain smoke extraction effect, the L-shaped baffle must be large enough. Therefore, the existing range hood's smoke collection chamber needs to be deep enough to accommodate the L-shaped baffle. Otherwise, the L-shaped baffle will structurally interfere with the back panel of the smoke collection chamber, which means that the depth of the smoke collection chamber cannot be reduced, making it difficult to achieve an ultra-thin design for the range hood. Summary of the Invention

[0005] To address the issues that existing range hoods require sufficient depth in their smoke collection chambers to accommodate L-shaped baffles and avoid structural interference, resulting in a relatively wide overall width of the smoke collection chamber from a side view and hindering the achievement of ultra-thin range hood designs, this application provides a telescopic smoke-blocking device and a range hood that can reduce the cross-sectional width of the smoke collection chamber while maintaining effective smoke extraction, thereby meeting the requirements for ultra-thin range hood designs.

[0006] To achieve at least one of the above-mentioned advantages or other advantages and objectives of the present invention, the present invention provides a telescopic smoke-blocking device, comprising:

[0007] A smoke baffle body, which is rotatably mounted on the front side of the smoke collection chamber to open or close the smoke inlet; and

[0008] A flow guide assembly is retractably disposed inside the smoke baffle body, switching between an extended state and a retracted state as the smoke baffle body flips up and down; when the smoke baffle body flips upward to open the smoke inlet, the flow guide assembly extends relative to the smoke baffle body to be in the extended state, and forms a flow guide with a triangular cross-section on the inner side of the smoke baffle body; when the smoke baffle body flips downward to close the smoke inlet, the flow guide assembly retracts relative to the smoke baffle body to be in the retracted state, and is housed within the smoke collection chamber.

[0009] In some embodiments of this application, the air deflector assembly includes a fixed cover body fixed to the smoke baffle body and having a telescopic opening, and a movable cover body movably disposed on the fixed cover body; when the air deflector assembly is in the extended state, the movable cover body extends out of the fixed cover body from the telescopic opening; when the air deflector assembly is in the retracted state, the movable cover body retracts at least partially from the fixed cover body from the telescopic opening.

[0010] In some embodiments of this application, the fixed cover includes an upper plate fixedly connected to the upper part of the smoke baffle and a lower plate fixedly connected to the lower part of the smoke baffle; the upper plate and the lower plate extend gradually backward from the inner wall of the smoke baffle to form a trapezoidal cover.

[0011] In some embodiments of this application, the included angle between the upper plate and the smoke baffle is between 15° and 60°; the included angle between the lower plate and the smoke baffle is between 15° and 60°.

[0012] In some embodiments of this application, the included angle between the upper plate and the smoke baffle is greater than the included angle between the lower plate and the smoke baffle; when the smoke baffle is flipped upward to open the smoke inlet, the sum of the included angle between the lower plate and the smoke baffle and the flipping angle of the smoke baffle is less than or equal to 90°.

[0013] In some embodiments of this application, the fixed cover further includes a pair of side plates located on the left and right sides of the upper plate and the lower plate, respectively, and the two side plates are fixedly connected to the left and right sides of the upper plate and the lower plate.

[0014] In some embodiments of this application, the movable cover includes a first guide plate for overlapping with the upper plate and a second guide plate for overlapping with the lower plate, the second guide plate extending obliquely from one end of the first guide plate to form an L-shaped cover.

[0015] In some embodiments of this application, the first guide plate is parallel to the upper plate; the second guide plate is parallel to the lower plate; both the first guide plate and the second guide plate have free ends that bend outwards; and both the upper plate and the lower plate have free ends that bend inwards.

[0016] In some embodiments of this application, the movable cover further includes a pair of sealing plates located on the left and right sides of the first guide plate and the second guide plate, respectively, and the two sealing plates are fixedly connected to the left and right sides of the first guide plate and the second guide plate.

[0017] In some embodiments of this application, the first guide plate is slidably disposed on the inner wall surface of the upper plate.

[0018] In some embodiments of this application, the telescopic smoke barrier further includes a guide mechanism disposed between the movable hood and the smoke barrier plate, for guiding the movable hood to move closer to or away from the smoke barrier plate to extend or retract the fixed hood.

[0019] In some embodiments of this application, the guiding mechanism is a telescopic link or an electric telescopic rod that connects the smoke baffle body and the movable cover at both ends respectively.

[0020] According to another aspect of this application, this application further provides a range hood, comprising:

[0021] Fan box;

[0022] A smoke collection chamber is located below the fan box and has a smoke inlet; and

[0023] The telescopic smoke-blocking device described above is rotatably disposed in the smoke collection chamber for opening or closing the smoke inlet.

[0024] In summary, when the smoke baffle body flips upward to open the smoke inlet, the guide hood assembly extends relative to the smoke baffle body to be in an extended state, and forms a guide hood with a triangular cross-section on the inner side of the smoke baffle body. This allows the negative pressure area formed on the inner side of the smoke baffle body to move downward, improving the smoke extraction effect. At the same time, the guide hood with a triangular cross-section can also change the flow path of the smoke, so that less smoke escapes through the gap between the smoke baffle body and the smoke collection chamber, and can guide the oil flowing down from the fan box into the oil cup located at the bottom of the smoke collection chamber, avoiding the accumulation of oil on the inner surface of the smoke baffle body and preventing oil from dripping onto the cooking utensils along the inner surface of the smoke baffle body.

[0025] When the smoke baffle body flips down to close the smoke inlet, the flow guide assembly retracts relative to the smoke baffle body to be housed within the smoke collection chamber, allowing the smoke collection chamber to be designed to be ultra-thin without structural interference with the flow guide assembly. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the range hood assembly in the open state according to an embodiment of the present invention;

[0027] Figure 2 The above is shown Figure 1 The diagram shows a cross-sectional view of the range hood.

[0028] Figure 3 A schematic diagram showing the state of the range hood assembly in the closed state according to the above embodiments of this application is shown.

[0029] Figure 4 The above is shown Figure 3 The diagram shows a cross-sectional view of the range hood.

[0030] Figure 5 A modified example of a range hood according to the above embodiments of this application is shown, wherein the air guide assembly is in the open state;

[0031] Figure 6 A schematic diagram is shown of the state in which the deflector assembly in the range hood according to the above-described modified example of this application is in the closed state.

[0032] Explanation of key component symbols:

[0033] 1. Telescopic smoke baffle; 10. Smoke baffle plate; 20. Flow guide hood assembly; 21. Fixed hood; 210. Telescopic opening; 211. Upper plate; 212. Lower plate; 213. Side plate; 22. Movable hood; 221. First flow guide plate; 222. Second flow guide plate; 223. Sealing plate; 30. Guide mechanism; 31. Telescopic connecting rod; 311. First pull rod; 312. Second pull rod; 32. Electric push-pull rod; 2. Smoke collection chamber; 3. Smoke inlet; 4. Fan box.

[0034] The above description of the main component symbols, together with the accompanying drawings and specific embodiments, provides a more detailed explanation of the present invention. Detailed Implementation

[0035] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0036] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention 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 invention.

[0037] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0038] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0039] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0040] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0041] Considering that existing range hoods require sufficient depth in their smoke collection chamber to accommodate the L-shaped baffle and avoid structural interference, resulting in a relatively wide overall width of the smoke collection chamber from a side view, it is difficult to achieve an ultra-thin design for the range hood. Therefore, this application creatively provides a telescopic smoke-blocking device and a range hood that can reduce the cross-sectional width of the smoke collection chamber while ensuring effective smoke extraction, thus meeting the requirements for an ultra-thin range hood design.

[0042] Specifically, according to another aspect of this application, such as Figures 1 to 4As shown, one embodiment of this application provides a range hood, which may include a fan box 4, a smoke collection chamber 2 disposed below the fan box 4 and having a smoke inlet 3, and a retractable smoke baffle 1 disposed in the smoke collection chamber 2 for opening or closing the smoke inlet 3, so as to extract fumes when the smoke inlet 3 is open. It is understood that the range hood of this application may also include, but is not limited to, an oil cup, a water tank, a water collection box, and / or sensors to assist in completing the smoke extraction function; these will not be elaborated upon here.

[0043] More specifically, such as Figures 1 to 4 As shown, the telescopic smoke-blocking device 1 may include a smoke-blocking plate 10 and a flow guide assembly 20. The smoke-blocking plate 10 is rotatably disposed on the front side of the smoke collection chamber 2 to open or close the smoke inlet 3. The flow guide assembly 20 is telescopically disposed inside the smoke-blocking plate 10, so as to switch between an extended state and a retracted state as the smoke-blocking plate 10 flips up and down.

[0044] like Figure 1 and Figure 2 As shown, when the smoke baffle 10 is flipped upward to open the smoke inlet 3, the guide hood assembly 20 extends relative to the smoke baffle 10 to be in an extended state, and forms a guide hood with a triangular cross-section on the inner side of the smoke baffle 10, so that the negative pressure area formed on the inner side of the smoke baffle 10 is moved downward, improving the smoke extraction effect; at the same time, the guide hood with a triangular cross-section can also change the flow path of the smoke, so that less smoke escapes through the gap between the smoke baffle 10 and the smoke collection chamber 2, and can guide the oil flowing down from the fan box 4 into the oil cup located at the bottom of the smoke collection chamber 2, avoiding the accumulation of oil on the inner surface of the smoke baffle 10, and preventing oil from dripping onto the cooking utensils along the inner surface of the smoke baffle 10.

[0045] And such Figure 3 and Figure 4 As shown, when the smoke baffle 10 flips downward to close the smoke inlet 3, the flow guide assembly 20 retracts relative to the smoke baffle 10 to be housed within the smoke collection chamber 2, allowing the smoke collection chamber 2 to be designed to be ultra-thin without structural interference with the flow guide assembly 20. It can be understood that flipping the smoke baffle 10 upward means that the smoke baffle 10 flips towards the fan housing 4 to move away from the smoke collection chamber 2 and open the smoke inlet 3; flipping the smoke baffle 10 downward means that the smoke baffle 10 flips away from the fan housing 4 to move closer to the smoke collection chamber 2 and close the smoke inlet 3; the inner side of the smoke baffle 10 refers to the side of the smoke baffle 10 facing the smoke collection chamber 2.

[0046] For example, such as Figure 2 and Figure 4As shown, the flow guide assembly 20 may include a fixed cover 21 fixed to the smoke baffle 10 and having a telescopic opening 210, and a movable cover 22 movably disposed on the fixed cover 21. When the flow guide assembly 20 is in the extended state, the movable cover 22 extends out of the fixed cover 21 from the telescopic opening 210 to connect with the fixed cover 21 to form a flow guide with a triangular cross-section. This ensures that while achieving a downward shift in negative pressure height, it also provides good smoke and oil guiding effects, which helps reduce oil fume escape and prevents oil dripping. When the flow guide assembly 20 is in the retracted state, the movable cover 22 retracts at least partially from the telescopic opening 210 back into the fixed cover 21 to occupy less space and be easily housed within the ultra-thin smoke collection chamber 2 without structural interference with the smoke collection chamber 2.

[0047] It is worth noting that, in the above examples of this application, such as Figure 1 and Figure 2 As shown, when the fairing assembly 20 is in the extended state, the movable cover 22 can only extend partially from the telescopic opening 210 of the fixed cover 21 to directly form a fairing with the fixed cover 21 having a triangular cross-section. In other examples of this application, the fairing assembly 20 may also include one or more connecting covers disposed between the fixed cover 21 and the movable cover 22, so that when the fairing assembly 20 is in the extended state, the movable cover 22 can fully extend from the telescopic opening 210 of the fixed cover 21 to form a fairing with the fixed cover 21 having a triangular cross-section together with the fixed cover 21 through the connecting cover. This application will not elaborate further on this aspect.

[0048] Optionally, such as Figure 2 and Figure 4 As shown, the fixed cover 21 includes an upper plate 211 fixedly connected to the upper part of the smoke baffle 10 and a lower plate 212 fixedly connected to the lower part of the smoke baffle 10; the upper plate 211 and the lower plate 212 extend gradually rearward from the inner wall of the smoke baffle 10 to form a trapezoidal cover. In other words, the front end of the upper plate 211 and the front end of the lower plate 212 are respectively fixedly connected to the upper and lower parts of the smoke baffle 10 to form a trapezoidal cross-sectional space between the upper plate 211 and the lower plate 212 for fully or partially accommodating the movable cover 22, such that the telescopic opening 210 formed between the rear end of the upper plate 211 and the rear end of the lower plate 212 is implemented as the top bottom opening of the trapezoidal cover. It is understood that the front end mentioned in this application refers to the fixed end on the upper plate 211 and / or the lower plate 212 that is fixedly connected to the smoke baffle 10, and the rear end mentioned in this application refers to the free end on the upper plate 211 and / or the lower plate 212 that is away from the smoke baffle 10.

[0049] For example, the included angle γ1 between the upper plate 211 and the smoke baffle 10 can be between 15° and 60°, i.e., γ1∈[15°,60°]; the included angle γ2 between the lower plate 212 and the smoke baffle 10 can be between 15° and 60°, i.e., γ2∈[15°,60°].

[0050] Optionally, such as Figure 2 As shown, the included angle γ1 between the upper plate 211 and the smoke baffle 10 is greater than the included angle γ2 between the lower plate 212 and the smoke baffle 10, i.e., γ1 > γ2. This makes the lower plate 212 closer to the smoke baffle 10 than the upper plate 211, so that while the lower plate 212 can better guide the oil fumes into the smoke collection chamber 2, the upper plate 211 can also better guide the oil stains into the smoke collection chamber 2 so that they can be collected by the oil cup set at the bottom of the smoke collection chamber 2.

[0051] Optionally, when the smoke baffle 10 is flipped upward to open the smoke inlet 3, the sum of the angle γ2 between the lower plate 212 and the smoke baffle 10 and the flipping angle α of the smoke baffle 10 is less than or equal to 90°, so that the angle β between the extension line of the lower plate 212 and the back plate of the smoke collection chamber 2 is less than or equal to 90°, ensuring that the lower plate 212 extends horizontally or obliquely upward from the inner wall of the smoke baffle 10, so as to better guide the oil fumes into the smoke collection chamber 2 while lowering the negative pressure height of the smoke control area.

[0052] Optionally, such as Figure 2 and Figure 4 As shown, the fixed cover 21 also includes a pair of side plates 213 located on the left and right sides of the upper plate 211 and the lower plate 212, respectively. The two side plates 213 are fixedly connected to the left and right sides of the upper plate 211 and the lower plate 212, respectively, to seal the left and right side gaps between the upper plate 211 and the lower plate 212, and prevent oil fumes from entering the internal space of the fixed cover 21 through the left and right side gaps.

[0053] According to the above embodiments of this application, as Figure 2 and Figure 4 As shown, the movable cover 22 may include a first guide plate 221 for overlapping with the upper plate 211 and a second guide plate 222 for overlapping with the lower plate 212. The second guide plate 222 extends obliquely from one end of the first guide plate 221 to form an L-shaped cover. Thus, when the cover assembly 20 is in the extended state, the first guide plate 221 overlaps with the free end of the upper plate 211, and the second guide plate 222 overlaps with the free end of the lower plate 212, forming a triangular cross-section cover inside the smoke baffle 10 for guiding smoke and oil.

[0054] Optionally, such as Figure 2 and Figure 4 As shown, the first guide plate 221 is substantially parallel to the upper plate 211, and the second guide plate 222 is substantially parallel to the lower plate 212. In this way, the oil sludge guided by the upper plate 211 can flow smoothly through the first guide plate 221 and drip into the smoke collection chamber 2; simultaneously, the oil fumes guided by the lower plate 212, without changing their flow direction, are guided through the second guide plate 222 to the smoke inlet 3 of the smoke collection chamber 2, thus achieving a better smoke and oil guiding effect.

[0055] Optionally, such as Figure 2 and Figure 4 As shown, the movable cover 22 also includes a pair of sealing plates 223 located on the left and right sides of the first guide plate 221 and the second guide plate 222, respectively. The two sealing plates 223 are fixedly connected to the left and right sides of the first guide plate 221 and the second guide plate 222, so as to seal the left and right side openings between the first guide plate 221 and the second guide plate 222, and prevent oil fumes from entering the internal space of the movable cover 22 through the left and right side openings.

[0056] It is worth noting that, in the above examples of this application, such as Figure 2 and Figure 4 As shown, the first guide plate 221 is integrally connected to the second guide plate 222, meaning that the first guide plate 221 and the second guide plate 222 can be formed by bending a single piece of guide plate. Of course, in other examples of this application, the first guide plate 221 and the second guide plate 222 can also be assembled by welding or riveting, which will not be elaborated further in this application.

[0057] Optionally, such as Figure 2 and Figure 4 As shown, both the first guide plate 221 and the second guide plate 222 have outwardly bent free ends; simultaneously, both the upper plate 211 and the lower plate 212 have inwardly bent free ends, achieving a better overlapping fit. Thus, when the air deflector assembly 20 is in the extended state, the free end of the first guide plate 221 adheres to the inner side of the free end of the upper plate 211; simultaneously, the free end of the second guide plate 222 adheres to the inner side of the free end of the lower plate 212, thereby forming a good overlapping sealing effect. This prevents oil from flowing into the internal space of the air deflector assembly 20 through the overlap between the first guide plate 221 and the upper plate 211, and also prevents fumes from entering the internal space of the air deflector assembly 20 through the overlap between the second guide plate 222 and the lower plate 212.

[0058] It is worth noting that the ends of the sealing plate 223 and the side plate 213 mentioned in this application can also be bent to fit together when the fairing assembly 20 is in the extended state, forming a better sealing and limiting effect and preventing the movable fairing 22 from detaching from the fixed fairing 21. In addition, one of the plates in the movable fairing 22 can slide and extend along the inner wall of the corresponding plate on the fixed fairing 21 to improve the expansion and contraction stability of the fairing assembly 20.

[0059] Exemplarily, in one example of this application, such as Figure 2 and Figure 4 As shown, the first guide plate 221 of the movable cover 22 is slidably disposed on the inner wall surface of the upper plate 211 of the fixed cover 21, so that the movable cover 22 can extend or retract along the inner wall surface of the upper plate 211; at this time, the second guide plate 222 of the movable cover 22 is correspondingly closer to or farther from the inner wall surface of the lower plate 212. Of course, in another example of this application, the second guide plate 222 of the movable cover 22 is slidably disposed on the inner wall surface of the lower plate 212 of the fixed cover 21, so that the movable cover 22 can extend or retract along the inner wall surface of the lower plate 212; at this time, the first guide plate 221 of the movable cover 22 is correspondingly closer to or farther from the inner wall surface of the upper plate 211.

[0060] It is worth noting that in the two examples described above in this application, when the flow guide assembly 20 is in a retracted state, the first flow guide plate 221 and the second flow guide plate 222 of the movable cover 22 are respectively located inside the upper plate 211 and the lower plate 212 of the fixed cover 21, so that the movable cover 22 is completely contained in the internal space of the fixed cover 21.

[0061] Of course, in other examples of this application, one of the plates in the movable cover 22 can slide and extend along the outer wall of the corresponding plate on the fixed cover 21, which can still improve the telescopic stability of the flow guide assembly 20. For example, the first flow guide plate 221 is slidably disposed on the outer wall of the upper plate 211, so that when the flow guide assembly 20 is in the retracted state, the first flow guide plate 221 is located outside the upper plate 211, and the second flow guide plate 222 is located inside the lower plate 212, so that the movable cover 22 is partially housed in the internal space of the fixed cover 21.

[0062] Furthermore, in order to better guide the movable cover 22 to extend or retract relative to the fixed cover 21, such as Figure 2 and Figure 4As shown, the telescopic smoke-blocking device 1 of this application may further include a guide mechanism 30 disposed between the movable cover 22 and the smoke-blocking plate 10, for guiding the movable cover 22 to approach or move away from the smoke-blocking plate 10, so as to extend or retract the fixed cover 21, so that the guide cover assembly 20 smoothly switches between the extended state and the retracted state.

[0063] Optionally, the guide mechanism 30 has a guide direction parallel to the extension direction of the upper plate 211, for guiding the movable cover 22 to slide along the upper plate 211.

[0064] For example, such as Figure 2 and Figure 4 As shown, the guide mechanism 30 can be implemented as a telescopic link 31, one end of which is connected to the smoke baffle 10, and the other end of which is connected to the movable cover 22. Thus, when the smoke baffle 10 flips upward to open the smoke inlet 3, the movable cover 22 slides downward under its own weight to extend the airflow guide assembly 20. At this time, the telescopic link 31 extends under the drive of the movable cover 22 and applies a pulling force to it, thereby slowing down the downward speed of the movable cover 22 and preventing it from descending too quickly under gravity, which could affect its service life. When the smoke baffle 10 flips downward to close the smoke inlet 3, the movable cover 22 abuts against the back plate of the smoke collection chamber 2 and is pushed upward, causing the movable cover 22 to slide upward so that the guide shroud assembly 20 is in a retracted state. At this time, the telescopic link 31 retracts under the action of the movable cover 22, so that the movable cover 22 can be stored in the cavity of the smoke collection chamber 2 without interference. It is understood that the telescopic link 31 mentioned in this application is implemented as a non-powered guide mechanism.

[0065] Optionally, such as Figure 2 and Figure 4 As shown, the telescopic link 31 is parallel to the upper plate 211 of the fixed cover 21 to guide the movable cover 22 to slide along the upper plate 211.

[0066] Optionally, such as Figure 2 and Figure 4 As shown, the telescopic link 31 includes a first pull rod 311 fixedly connected to the smoke baffle body 10 and a second pull rod 312 fixedly connected to the second guide plate body 222 of the movable cover 22. The first pull rod 311 is slidably sleeved on the periphery of the second pull rod 312 to guide the first guide plate body 221 of the movable cover 22 to slide along the wall surface of the upper plate body 211.

[0067] Furthermore, in one modified example of this application, such as Figure 5 and Figure 6As shown, the guide mechanism 30 can be implemented as an electric push-pull rod 32, one end of which is connected to the smoke baffle 10, and the other end of which is connected to the movable cover 22. Thus, when the smoke baffle 10 flips upward to open the smoke inlet 3, the electric push-pull rod 32 can push the movable cover 22 downward to slowly slide it, causing the guide hood assembly 20 to be in an extended state. When the smoke baffle 10 flips downward to close the smoke inlet 3, the electric push-pull rod 32 can pull the movable cover 22 upward to slide it, causing the guide hood assembly 20 to be in a retracted state. Without needing to abut against the back plate of the smoke collection chamber 2, the movable cover 22 can be stored without interference within the cavity of the smoke collection chamber 2. It is understood that the electric push-pull rod 32 mentioned in this application is implemented as a powered guide mechanism; in addition, the guide mechanism 30 of this application can also be implemented as other guide components such as cylinders, hydraulic rods or linear motors, which will not be described in detail here.

[0068] It is worth noting that, according to the above embodiments of this application, the telescopic smoke-blocking device 1 may further include a flipping drive mechanism drivenly connected to the smoke-blocking plate 10, for driving the smoke-blocking plate 10 to flip up and down, so that during the process of flipping the smoke-blocking plate 10 upward to open the smoke inlet 3, the guide shroud assembly 20 is switched from the retracted state to the extended state. It is understood that the flipping drive mechanism mentioned in this application may, but is not limited to, be implemented as an electric push rod mechanism, and this application will not elaborate further on this.

[0069] Furthermore, since the guide hood assembly 20 in the telescopic smoke baffle 1 can switch between an extended state and a retracted state, the telescopic smoke baffle 1 can not only form a guide hood with a triangular cross-section to move the negative pressure area downward, but also can overlay the fixed hood 21 and the movable hood 22 inside the smoke baffle plate 10 to be accommodated within the smoke collection chamber 2. Therefore, the smoke collection chamber 2 in the range hood of this application can be implemented as a wedge-shaped hood that is wider at the top and narrower at the bottom or a rectangular hood that is equal in width at the top and bottom, so as to meet the ultra-thin design of the smoke collection chamber 2.

[0070] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0071] The above embodiments are merely illustrative of several implementations of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of this application.

Claims

1. A telescopic smoke-blocking device, characterized in that, include: A smoke baffle body is rotatably mounted on the front side of the smoke collection chamber to open or close the smoke inlet; and A flow guide assembly is retractably disposed inside the smoke baffle body, switching between an extended state and a retracted state as the smoke baffle body flips up and down; when the smoke baffle body flips upward to open the smoke inlet, the flow guide assembly extends relative to the smoke baffle body to be in the extended state, and forms a flow guide with a triangular cross-section on the inner side of the smoke baffle body; when the smoke baffle body flips downward to close the smoke inlet, the flow guide assembly retracts relative to the smoke baffle body to be in the retracted state, for being housed within the smoke collection chamber; The air deflector assembly includes a fixed cover body fixed to the smoke baffle body and having a telescopic opening, and a movable cover body movably disposed on the fixed cover body; when the air deflector assembly is in the extended state, the movable cover body extends out of the fixed cover body from the telescopic opening; when the air deflector assembly is in the retracted state, the movable cover body retracts at least partially from the telescopic opening back into the fixed cover body. The fixed cover includes an upper plate fixedly connected to the upper part of the smoke baffle and a lower plate fixedly connected to the lower part of the smoke baffle; the upper plate and the lower plate extend gradually backward from the inner wall of the smoke baffle to form a trapezoidal cover; The movable cover includes a first guide plate for overlapping with the upper plate and a second guide plate for overlapping with the lower plate. The second guide plate extends obliquely from one end of the first guide plate to form an L-shaped cover.

2. The telescopic smoke-blocking device according to claim 1, characterized in that, The included angle between the upper plate and the smoke baffle is between 15° and 60°; the included angle between the lower plate and the smoke baffle is between 15° and 60°.

3. The telescopic smoke-blocking device according to claim 2, characterized in that, The included angle between the upper plate and the smoke baffle is greater than the included angle between the lower plate and the smoke baffle; when the smoke baffle is flipped upward to open the smoke inlet, the sum of the included angle between the lower plate and the smoke baffle and the flipping angle of the smoke baffle is less than or equal to 90°.

4. The telescopic smoke-blocking device according to claim 1, characterized in that, The fixed cover also includes a pair of side plates located on the left and right sides of the upper plate and the lower plate, respectively, and the two side plates are fixedly connected to the left and right sides of the upper plate and the lower plate, respectively.

5. The telescopic smoke-blocking device according to any one of claims 1 to 4, characterized in that, The first guide plate is parallel to the upper plate; the second guide plate is parallel to the lower plate; both the first and second guide plates have free ends that bend outwards; both the upper and lower plates have free ends that bend inwards.

6. The telescopic smoke-blocking device according to any one of claims 1 to 4, characterized in that, The movable cover also includes a pair of sealing plates located on the left and right sides of the first guide plate and the second guide plate, respectively, and the two sealing plates are fixedly connected to the left and right sides of the first guide plate and the second guide plate.

7. The telescopic smoke-blocking device according to any one of claims 1 to 4, characterized in that, The first guide plate is slidably disposed on the inner wall surface of the upper plate.

8. The telescopic smoke-blocking device according to any one of claims 1 to 4, characterized in that, It also includes a guiding mechanism disposed between the movable hood and the smoke baffle, for guiding the movable hood to move closer to or away from the smoke baffle to extend or retract the fixed hood.

9. The telescopic smoke-blocking device according to claim 8, characterized in that, The guiding mechanism is a telescopic connecting rod that connects the smoke baffle body and the movable cover at both ends.

10. The telescopic smoke-blocking device according to claim 8, characterized in that, The guiding mechanism is an electric push-pull rod whose two ends are respectively connected to the smoke baffle and the movable cover.

11. A range hood, characterized in that, include: Fan box; The smoke collection chamber is located below the fan box and has a smoke inlet. as well as The telescopic smoke-blocking device as described in any one of claims 1 to 10, wherein the telescopic smoke-blocking device is rotatably disposed in the smoke collection chamber for opening or closing the smoke inlet.

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