Air deflector type smoke blocking device and extractor hood

Abstract

The application relates to a flow-guiding type smoke blocking device and an extractor hood, which can meet the design requirement of the ultra-thinization of the extractor hood and avoid structural interference between a flow guide cover and a smoke collecting cover. The flow-guiding type smoke blocking device comprises a smoke blocking plate with an opening state for opening an air inlet and a closing state for closing the air inlet, and a flow guide cover comprising a first flow guide plate rotationally connected with the upper part of the smoke blocking plate and a second flow guide plate rotationally connected with the lower part of the smoke blocking plate; when the smoke blocking plate is in the opening state, the first flow guide plate and the second flow guide plate are in mutual connection to form a triangular flow guide cover on the inner side of the smoke blocking plate; when the smoke blocking plate is in the closing state, the first flow guide plate and the second flow guide plate are mutually stacked on the inner side of the smoke blocking plate and are used for being accommodated in the smoke collecting cover.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of range hood, in particular to a flow guide type smoke blocking device and a range hood. BACKGROUND

[0002] With the improvement of people's living quality, the range hood has become one of the indispensable kitchen household appliances in modern families, which is usually installed above the kitchen stove and can suck the oil fume generated in the cooking process, thereby purifying the kitchen environment and improving the comfort of people when cooking.

[0003] The current ultra-thin design has become the mainstream direction of the range hood, and a reverse triangular flow guide cover is arranged on the smoke blocking plate, so that the range hood can move the negative pressure area downward by using the flow guide cover when working to improve the oil fume suction effect. However, since the range hood will use the smoke blocking plate to close the smoke inlet when not working, the reverse triangular flow guide cover is located inside the smoke collecting cover, so in order to accommodate the reverse triangular flow guide cover, the smoke collecting cover of the existing range hood needs to ensure sufficient depth, otherwise the reverse triangular flow guide cover will interfere with the back plate of the smoke collecting cover, which limits the ultra-thin design of the range hood. SUMMARY

[0004] In view of the problem that the smoke collecting cover of the existing range hood needs to ensure sufficient depth to avoid structural interference when accommodating the reverse triangular flow guide cover, which limits the ultra-thin design of the range hood, the present application provides a flow guide type smoke blocking device and a range hood, which can meet the requirement of the ultra-thin design of the range hood while avoiding structural interference between the flow guide cover and the smoke collecting cover.

[0005] In order to achieve at least one advantage or other advantages of the present application or the purpose, the present application provides a flow guide type smoke blocking device, comprising:

[0006] a smoke blocking plate having an open state for opening the smoke inlet and a closed state for closing the smoke inlet; and

[0007] a flow guide cover comprising a first flow guide plate rotatably connected to the upper part of the smoke blocking plate and a second flow guide plate rotatably connected to the lower part of the smoke blocking plate; when the smoke blocking plate is in the open state, the first flow guide plate and the second flow guide plate are in mutual connection to form a triangular flow guide cover on the inner side of the smoke blocking plate; when the smoke blocking plate is in the closed state, the first flow guide plate and the second flow guide plate are stacked on the inner side of the smoke blocking plate for being accommodated in the smoke collecting cover.

[0008] In some embodiments of the present application, the first deflector has a first pivot portion pivotally connected to an upper edge of the smoke screen and a first free end portion extending radially from the first pivot portion and configured to engage with the second deflector; the second deflector has a second pivot portion pivotally connected to a lower edge of the smoke screen and a second free end portion extending radially from the second pivot portion and configured to engage with the first deflector.

[0009] In some embodiments of the present application, when the smoke screen is in the open state, the second deflector extends horizontally or obliquely upward away from the smoke screen.

[0010] In some embodiments of the present application, when the smoke screen is in the closed state, the first deflector is stacked between the second deflector and the smoke screen.

[0011] In some embodiments of the present application, when the smoke screen is in the closed state, an angle between the first deflector and the smoke screen is less than or equal to 15°, and an angle between the second deflector and the smoke screen is less than or equal to 20°.

[0012] In some embodiments of the present application, the first deflector further has a first limiting end portion extending from the first pivot portion toward a direction away from the first free end portion, such that the first limiting end portion abuts against the smoke screen when the smoke screen is in the open state; the second deflector further has a second limiting end portion extending from the second pivot portion toward a direction away from the second free end portion, such that the second limiting end portion abuts against the smoke screen when the smoke screen is in the open state.

[0013] In some embodiments of the present application, the first limiting end portion extends obliquely relative to the first free end portion; the second limiting end portion extends straight relative to the second free end portion.

[0014] In some embodiments of the present application, the deflector further comprises a shield protruding from the first free end portion or the second free end portion, such that a gap between the first free end portion and the second free end portion is shielded when the first free end portion engages with the second free end portion.

[0015] In some embodiments of the present application, the shield comprises a lapping plate extending upward from the second free end portion and a flexible pad fixed to the lapping plate; the first deflector further has a lapping groove formed in the first free end portion and matching the lapping plate.

[0016] In some embodiments of the present application, the smoke deflector further comprises a driving mechanism arranged between the deflector cover and the smoke deflector plate, for driving the first deflector plate and / or the second deflector plate to rotate relative to the smoke deflector plate, so as to adjust the included angle between the first deflector plate and / or the second deflector plate and the smoke deflector plate.

[0017] In some embodiments of the present application, the driving mechanism comprises an electromagnet fixed to the smoke deflector plate and a magnetic attraction member fixed to the second deflector plate and cooperating with the electromagnet; or the driving mechanism comprises an electromagnet fixed to the smoke deflector plate, and the second deflector plate is made of a magnetic attraction material cooperating with the electromagnet.

[0018] In some embodiments of the present application, the driving mechanism is an electric push-pull rod arranged on the smoke deflector plate, and the electric push-pull rod is drivingly connected to the second deflector plate.

[0019] In some embodiments of the present application, the driving mechanism is a non-electric telescopic rod, one end of the non-electric telescopic rod is connected to the smoke deflector plate, and the other end of the non-electric telescopic rod is connected to the second deflector plate.

[0020] In some embodiments of the present application, the smoke deflector further comprises a smoke detector arranged on the deflector cover and used for collecting the concentration of oil fume, and a controller communicatively connected with the smoke detector and the driving mechanism; the controller is used for obtaining the information of the concentration of oil fume collected by the smoke detector, judging the current concentration level of oil fume, and controlling the driving mechanism to adjust the included angle between the first deflector plate and / or the second deflector plate and the smoke deflector plate based on the current concentration level of oil fume.

[0021] According to another aspect of the present application, the present application further provides an oil fume extractor, comprising:

[0022] a fan box;

[0023] a smoke collecting cover arranged below the fan box and provided with an oil fume inlet; and

[0024] The smoke deflector described above, which is reversibly arranged on the smoke collecting cover and used for opening or closing the oil fume inlet.

[0025] In summary, when the smoke baffle is in the open state, the first guide plate and the second guide plate are connected to each other to form a triangular guide hood on the inner side of the smoke baffle, so that the negative pressure area formed below the smoke baffle is moved downward, improving the smoke extraction effect; when the smoke baffle is in the closed state, the first guide plate and the second guide plate are stacked on the inner side of the smoke baffle to be accommodated within the smoke collection hood, so that the smoke collection hood can be designed to be ultra-thin without structural interference with the guide hood.

[0026] Furthermore, the flow-guiding smoke-blocking device of this application can acquire the oil fume concentration information collected by the oil fume detector to determine the current oil fume concentration level, and based on the current oil fume concentration level, control the drive mechanism to adjust the angle between the first flow guide plate and / or the second flow guide plate and the smoke-blocking plate, so that the degree of negative pressure area reduction automatically matches the current oil fume concentration level. Attached Figure Description

[0027] Figure 1 This is a schematic diagram showing the smoke baffle in the open state of a range hood according to an embodiment of the present invention;

[0028] Figure 2 A schematic diagram showing the state in which the smoke baffle is in the closed state in the range hood according to the above embodiment of this application is shown;

[0029] Figure 3 The above is shown Figure 1 The diagram shows a cross-sectional view of the range hood.

[0030] Figure 4 The above is shown Figure 3 An enlarged schematic diagram of part A in the range hood shown;

[0031] Figure 5 The above is shown Figure 2 The diagram shows a cross-sectional view of the range hood.

[0032] Figure 6 A first example of a flow-guiding smoke-blocking device in a range hood according to the above embodiments of this application is shown;

[0033] Figure 7 A second example of a flow-guiding smoke-blocking device in a range hood according to the above embodiments of this application is shown, wherein the smoke-blocking plate is in an open state;

[0034] Figure 8 A second example of a flow-guiding smoke-blocking device in a range hood according to the above embodiments of this application is shown, wherein the smoke-blocking plate is in a closed state.

[0035] Explanation of key component symbols:

[0036] 1. Smoke deflector; 10. Smoke baffle; 20. Deflector hood; 21. First deflector plate; 211. First rotating shaft; 212. First free end; 213. First limiting end; 214. Overlap groove; 22. Second deflector plate; 221. Second rotating shaft; 222. Second free end; 223. Second limiting end; 23. Lighting fixture; 24. Protective component; 241. Overlap plate; 242. Flexible pad; 30. Drive mechanism; 31. Electromagnet; 32. Magnetic suction component; 33. Electric push-pull rod; 2. Smoke hood; 3. Smoke inlet; 4. Fan box.

[0037] 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

[0038] 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.

[0039] 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.

[0040] 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.

[0041] 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.

[0042] 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.

[0043] Considering that existing range hoods require sufficient depth to accommodate an inverted triangular baffle, otherwise the baffle will structurally interfere with the back panel of the range hood, limiting the ultra-thin design of the range hood and hindering the realization of an ultra-thin range hood design, this application creatively provides a baffle-type smoke-blocking device and range hood that can meet the requirements of an ultra-thin range hood design while avoiding structural interference between the baffle and the range hood.

[0044] Specifically, according to another aspect of this application, such as Figures 1 to 8 As shown, one embodiment of this application provides a range hood, which may include a fan box 4, a smoke collection hood 2 disposed below the fan box 4 and having a smoke inlet 3, and a flow-guiding smoke-blocking device 1 rotatably disposed on the smoke collection hood 2 for opening or closing the smoke inlet 3, for smoke extraction 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, 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.

[0045] More specifically, such as Figures 1 to 5As shown, the flow-guiding smoke-blocking device 1 may include a smoke-blocking plate 10 and a flow-guiding hood 20. The smoke-blocking plate 10 is rotatably disposed on the smoke collection hood 2, and the smoke-blocking plate 10 has an open state for opening the smoke inlet 3 and a closed state for closing the smoke inlet 3. The flow guide hood 20 includes a first flow guide plate 21 rotatably connected to the upper part of the smoke baffle 10 and a second flow guide plate 22 rotatably connected to the lower part of the smoke baffle 10. When the smoke baffle 10 is in the open state, the first flow guide plate 21 and the second flow guide plate 22 are connected to each other to form a triangular flow guide hood inside the smoke baffle 10, so that the negative pressure area formed below the smoke baffle 10 is moved downward, improving the smoke extraction effect. When the smoke baffle 10 is in the closed state, the first flow guide plate 21 and the second flow guide plate 22 are stacked on each other inside the smoke baffle 10 and are accommodated within the smoke collection hood 2, so that the smoke collection hood 2 can be designed to be ultra-thin without structural interference with the flow guide hood 20. It is understood that the upper part of the smoke baffle 10 refers to the part of the smoke baffle 10 that is close to the fan box 4, and the lower part of the smoke baffle 10 refers to the part of the smoke baffle 10 that is far away from the fan box 4; the inner side of the smoke baffle 10 refers to the side of the smoke baffle 10 facing the smoke collection hood 2.

[0046] For example, such as Figure 3 and Figure 5 As shown, the first guide plate 21 has a first pivot portion 211 rotatably connected to the upper edge of the smoke baffle 10 and a first free end portion 212 extending radially from the first pivot portion 211 and used for engaging with the second guide plate 22; the second guide plate 22 has a second pivot portion 221 rotatably connected to the lower edge of the smoke baffle 10 and a second free end portion 222 extending radially from the second pivot portion 221 and used for engaging with the first guide plate 21. It is understood that the rotation axes of the first pivot portion 211 and the second pivot portion 221 mentioned in this application are substantially parallel to the smoke baffle 10, so as to ensure that the first free end portion 212 and the second free end portion 222 can move away from or towards the smoke baffle 10 when rotating about the first pivot portion 211 and the second pivot portion 221 respectively.

[0047] Thus, as Figure 1 and Figure 3 As shown, when the smoke baffle 10 is in the open state, the first free end 212 of the first guide plate 21 and the second free end 222 of the second guide plate 22 are both away from the smoke baffle 10 and connected to each other to form a triangular guide shroud on the inner side of the smoke baffle 10; Figure 2 and Figure 5As shown, when the smoke baffle 10 is in the closed state, the first free end 212 of the first guide plate 21 and the second free end 222 of the second guide plate 22 are close to the smoke baffle 10 and separated from each other to be stacked on the inner side of the smoke baffle 10 so as to be accommodated in the smoke collection hood 2.

[0048] It is worth noting that, since the first guide plate 21 and the second guide plate 22 in the flow-guiding smoke-blocking device 1 of this application are rotatable relative to the smoke-blocking plate 10, the first free end 212 of the first guide plate 21 and the second free end 222 of the second guide plate 22 can simultaneously move away from or towards the smoke-blocking plate 10. Therefore, the flow-guiding smoke-blocking device 1 of this application can not only connect the first free end 212 and the second free end 222 that are simultaneously moving away from the smoke-blocking plate 10 when the smoke-blocking plate 10 is in the open state, but also... The first guide plate 21, the second guide plate 22, and the inner wall of the smoke baffle 10 together form an interconnected triangular guide hood, which facilitates the downward movement of the negative pressure area below the smoke baffle 10; moreover, when the smoke baffle 10 is in the closed state, the first free end 212 and the second free end 222 that are close to the smoke baffle 10 can be separated from each other, so that the first guide plate 21 and the second guide plate 22 are stacked inside the smoke baffle 10 so that they can be accommodated within the ultra-thin smoke collection hood 2 without structural interference.

[0049] Optionally, such as Figure 2 As shown, when the smoke baffle 10 is in the open state, the first guide plate 21 is arranged vertically and the second guide plate 22 is arranged horizontally, such that the first guide plate 21 and the second guide plate 22 intersect, thereby connecting with the smoke baffle 10 to form a triangular guide hood, realizing the downward shift of the negative pressure area. In other words, when the smoke baffle 10 is in the open state, the first free end 212 of the first guide plate 21 extends downward from the first pivot portion 211, and the second free end 222 of the second guide plate 22 extends backward from the second pivot portion 221, so as to ensure that the first free end 212 can connect with the second free end 222 to form a triangular guide hood.

[0050] Optionally, such as Figure 2As shown, when the smoke baffle 10 is in the open state, the angle α between the extension line of the second guide plate 22 and the back plate of the smoke hood 2 is less than or equal to 90°. That is, the second guide plate 22 extends horizontally or obliquely upward in a direction away from the smoke baffle 10 (i.e., towards the back plate of the smoke hood 2), so as to better guide the fumes into the smoke hood 2 while moving the negative pressure area downward, thereby improving the fume extraction effect. It can be understood that if the angle α between the extension line of the second guide plate 22 and the back plate of the smoke hood 2 is greater than 90°, that is, if the second guide plate 22 extends obliquely downward in a direction away from the smoke baffle 10, the fumes will first turn downward along the second guide plate 22 to enter the smoke hood 2, and then flow upward in the opposite direction under the suction of the fan. After two turns, the flow velocity of the fumes at the smoke inlet will decrease, resulting in a poorer fume extraction effect.

[0051] Optionally, such as Figure 5 As shown, when the smoke baffle 10 is in the closed state, the first guide plate 21 is stacked between the second guide plate 22 and the smoke baffle 10 to increase the space between the second guide plate 22 and the smoke baffle 10, facilitating the arrangement of various electrical devices between the second guide plate 22 and the smoke baffle 10. It is understood that in other examples of this application, when the smoke baffle 10 is in the closed state, the second guide plate 22 can be stacked between the first guide plate 21 and the smoke baffle 10, so that the second free end 222 of the second guide plate 22 can always contact the first guide plate 21, effectively preventing the second free end 222 of the second guide plate 22 from hitting the back plate of the smoke hood 2.

[0052] Optionally, such as Figure 5 As shown, when the smoke baffle 10 is in the closed state, the included angle β1 between the first guide plate 21 and the smoke baffle 10 is less than or equal to 15°, and the included angle β2 between the second guide plate 22 and the smoke baffle 10 is less than or equal to 20°. It is understood that the sizes of the included angles β1 and β2 mentioned in this application depend on whether the electrical equipment needs to be hidden within the guide shroud 20; the angle is larger when hiding is required and smaller when not hiding, and can even be equal to 0°.

[0053] Optionally, such as Figure 3 and Figure 5 As shown, the fairing 20 further includes a lighting fixture 23 mounted on the second fairing 22 for providing illumination when the smoke deflector 10 is in the open state. It is understood that in other examples of this application, the fairing 20 may also include other electrical devices, which will not be elaborated upon here.

[0054] Optionally, such as Figure 3As shown, the first guide plate 21 further has a first limiting end 213 extending from the first pivot portion 211 toward a direction away from the first free end 212, so that when the smoke baffle 10 is in the open state, the first limiting end 213 abuts against the smoke baffle 10, preventing the first guide plate 21 from rotating further relative to the smoke baffle 10, which helps to physically limit the maximum value of the included angle β1 between the first guide plate 21 and the smoke baffle 10.

[0055] Similarly, such as Figure 3 As shown, the second guide plate 22 further has a second limiting end 223 extending from the second pivot portion 221 toward a direction away from the second free end 222, so that when the smoke baffle 10 is in the open state, the second limiting end 223 abuts against the smoke baffle 10, preventing the second guide plate 22 from rotating further relative to the smoke baffle 10, which helps to physically limit the maximum value of the included angle β2 between the second guide plate 22 and the smoke baffle 10.

[0056] Optionally, such as Figure 3 and Figure 5 As shown, the first limiting end 213 extends obliquely relative to the first free end 212 so as to abut against the bracket on the smoke baffle 10 that is pivotally connected to the first rotating shaft portion 211, so as to avoid structural interference between the first guide plate 21 and the front panel of the smoke collection hood 2 when the first guide plate 21 rotates relative to the smoke baffle 10.

[0057] Optionally, such as Figure 3 and Figure 5 As shown, the second limiting end 223 extends straight relative to the second free end 222 so as to directly abut against the plate of the smoke baffle 10, thereby preventing a large gap between the second guide plate 22 and the smoke baffle 10 from causing oil fumes to enter the space between the second guide plate 22 and the smoke baffle 10 and pollute electrical equipment such as lighting fixtures 23.

[0058] It is worth noting that, since the first free end 212 of the first guide plate 21 and the second free end 222 of the second guide plate 22 are connected to each other when the smoke baffle 10 is in the open state and separated from each other when the smoke baffle 10 is in the closed state, gaps are likely to appear when the first free end 212 of the first guide plate 21 and the second free end 222 of the second guide plate 22 are connected to each other. As a result, when the oil fumes are guided by the guide hood 20, they will enter the internal space of the triangular guide hood from the gap between the first free end 212 and the second free end 222. This will not only cause oil accumulation in the guide hood 20, but also easily contaminate electrical equipment such as lighting fixtures 23.

[0059] To solve this problem, such as Figures 3 to 5As shown, the air deflector 20 of this application may further include a protective member 24 protruding from the first free end 212 or the second free end 222, so as to cover the gap between the first free end 212 and the second free end 222 when the first free end 212 is connected to the second free end 222, thereby preventing oil fumes from entering the internal space of the triangular air deflector formed.

[0060] For example, such as Figure 4 As shown, the protective member 24 may include an overlapping plate 241 extending upward from the second free end 222. When the smoke baffle 10 is in the open state, the overlapping plate 241 overlaps the first free end 212 in order to better cover the gap between the first free end 212 and the second free end 222.

[0061] Optionally, such as Figure 4 As shown, the overlapping plate 241 is integrally connected to the second free end 222 of the second guide plate 22; that is, the overlapping plate 241 can be directly bent from the second free end 222 of the second guide plate 22. It is understood that in other examples of this application, the overlapping plate 241 can also be implemented as a plastic plate or rubber plate fixedly installed on the second free end 222.

[0062] Optionally, such as Figure 4 As shown, the protective component 24 further includes a flexible pad 242 fixed to the overlapping plate 241. The flexible pad 242 is located on the side of the overlapping plate 241 facing the smoke baffle 10, and serves to buffer the overlap between the overlapping plate 241 and the first free end 212 to prevent collisions. Simultaneously, it also serves to dampen vibrations, preventing the overlapping plate 241 from colliding with the first free end 212 of the first guide plate 21 and generating noise when the fan vibrates during operation. It is understood that the flexible pad 242 mentioned in this application can be, but is not limited to, a silicone pad, a rubber pad, or a sponge pad, etc., and will not be elaborated further in this application.

[0063] Preferably, such as Figure 4 As shown, the first guide plate 21 further has an overlap groove 214 formed at the first free end 212 and matching the protective member 24. Thus, when the smoke baffle 10 is in the open state, the protective member 24 overlaps with the overlap groove 214 of the first guide plate 21, so that the inner surface of the protective member 24 can be flush with the inner surface of the first guide plate 21, which helps to reduce the resistance to the flow of oil fumes.

[0064] In addition, in order to further reduce the resistance of oil fumes, such as Figure 4As shown, the connection between the overlapping plate 241 of the protective component 24 and the second free end 222 of the second guide plate 22 is implemented as an arc-shaped bend to better guide the flow of oil fumes.

[0065] It is worth noting that, in order to adjust the degree of descent of the negative pressure zone when the smoke baffle 10 is in the open state, such as Figures 3 to 8 As shown, the flow-guiding smoke-blocking device 1 of this application may further include a driving mechanism 30 disposed between the flow guide hood 20 and the smoke-blocking plate 10, for driving the first flow guide plate 21 and / or the second flow guide plate 22 in the flow guide hood 20 to rotate relative to the smoke-blocking plate 10, so as to adjust the included angle between the first flow guide plate 21 and / or the second flow guide plate 22 and the smoke-blocking plate 10, thereby adjusting the degree of descent of the negative pressure area.

[0066] Furthermore, the flow-guiding smoke-blocking device 1 may further include an oil fume detector (not shown in the figure) disposed on the flow guide hood 20 for collecting oil fume concentration, and a controller (not shown in the figure) communicatively connected to the oil fume detector and the drive mechanism 30; the controller is used to acquire the oil fume concentration information collected by the oil fume detector to determine the current oil fume concentration level, and based on the current oil fume concentration level, control the drive mechanism 30 to adjust the angle between the first flow guide plate 21 and / or the second flow guide plate 22 and the smoke-blocking plate 10, so that the degree of negative pressure area reduction automatically matches the current oil fume concentration level. It is understood that the oil fume detector mentioned in this application may be implemented as an infrared sensor or a camera, but is not limited to that implemented in this application.

[0067] Optionally, the angle between the first guide plate 21 and / or the second guide plate 22 and the smoke baffle 10 is positively correlated with the current oil fume concentration level. For example, the higher the current oil fume concentration level, the larger the required angle between the first guide plate 21 and / or the second guide plate 22 and the smoke baffle 10, resulting in a greater decrease in the negative pressure area to meet the demand for large oil fumes; conversely, the lower the current oil fume concentration level, the greater the demand for small oil fumes.

[0068] Exemplarily, in the first example of this application, such as Figure 6As shown, the driving mechanism 30 may include an electromagnet 31 fixed to the smoke baffle 10 and a magnetic attractor 32 fixed to the second guide plate 22 and cooperating with the electromagnet 31. When the electromagnet 31 is energized to magnetically attract the magnetic attractor 32, the second free end 222 of the second guide plate 22 moves closer to the smoke baffle 10 under the action of magnetic attraction to reduce the angle between the second guide plate 22 and the smoke baffle 10, thereby reducing the degree of descent of the negative pressure area. When the electromagnet 31 is de-energized to release the magnetic attractor 32, the second free end 222 of the second guide plate 22 moves away from the smoke baffle 10 under the action of gravity to increase the angle between the second guide plate 22 and the smoke baffle 10, thereby increasing the degree of descent of the negative pressure area.

[0069] It is worth noting that the second guide plate 22 mentioned in this application can be implemented as a non-magnetic material such as a plastic plate or a stainless steel plate; of course, in other examples of this application, the second guide plate 22 can also be implemented as a magnetic material such as an iron plate or a steel plate that cooperates with the electromagnet 31. In this case, the electromagnet 31 can directly magnetically attract the second guide plate 22 when energized, so the magnetic attractor 32 can be omitted. In addition, the positions of the electromagnet 31 and the magnetic attractor 32 can be interchanged, which will not be elaborated further in this application.

[0070] Optionally, the magnetic member 32 is made of a magnetic material such as an iron sheet or a steel sheet, and is welded to the second free end 222 of the second guide plate 22.

[0071] Thus, as Figure 3 , Figure 5 as well as Figure 6 As shown, when the smoke baffle 10 switches from the closed state to the open state, the electromagnet 31 is energized to maintain the attraction of the second guide plate 22 and prevent the second free end 222 of the second guide plate 22 from contacting the back plate of the smoke hood 2; when the smoke baffle 10 switches to the open state, the electromagnet 31 is de-energized, and the first guide plate 21 and the second guide plate 22 begin to move downward under their own gravity to overlap each other and form a triangular guide hood; when the smoke baffle 10 switches from the open state to the closed state, the electromagnet 31 can still be de-energized. At this time, the second guide plate 22 will first touch the back plate of the smoke hood 2, so that under the pushing force of the back plate, the second guide plate 22 will be pushed to rotate toward the smoke baffle 10, and the first guide plate 21 will also rotate toward the smoke baffle 10, so that the first guide plate 21 and the second guide plate 22 are stacked on the inner side of the smoke baffle 10. It is understandable that when the smoke baffle 10 switches from the open state to the closed state, the electromagnet 31 can also be energized so as to use magnetic attraction to accelerate the stacking of the first guide plate 21 and the second guide plate 22, and prevent the second free end 222 of the second guide plate 22 from hitting the back plate of the smoke hood 2.

[0072] It is worth noting that in other examples of this application, the drive mechanism 30 can also be implemented as a mechanism such as a push-pull rod or a telescopic rod. For example, in the second example of this application, such as Figure 7 and Figure 8 As shown, the drive mechanism 30 is implemented as an electric push-pull rod 33 disposed on the smoke baffle 10. The electric push-pull rod 33 is driven to be connected to the second guide plate 22 to drive the second free end 222 to approach or move away from the smoke baffle 10.

[0073] Thus, as Figure 8 As shown, when the electric push-pull rod 33 pulls the second free end 222 close to the smoke baffle 10, the first free end 212 of the first guide plate 21, driven by the second guide plate 22, approaches the smoke baffle 10, so as to achieve the stacking of the first guide plate 21 and the second guide plate 22, thereby reducing the degree of descent of the negative pressure area; and as Figure 7 As shown, when the electric push-pull rod 33 pushes the second free end 222 away from the smoke baffle 10, the first free end 212 of the first guide plate 21 moves away from the smoke baffle 10 under the action of gravity, so as to achieve the overlap of the first guide plate 21 and the second guide plate 22, thereby increasing the degree of descent of the negative pressure area.

[0074] Optionally, such as Figure 7 and Figure 8 As shown, the push-pull end of the electric push-pull rod 33 is slidably pivotally connected to the second free end 222 of the second guide plate 22 to avoid jamming when pushing or pulling the second guide plate 22. It is understood that in other examples of this application, an additional electric push-pull rod (not shown in the figure) can also be provided between the first guide plate 21 and the smoke baffle 10 to independently control the rotation of the first guide plate 21 and the second guide plate 22, which helps to improve motion coordination and avoid jamming that may occur when a single guide plate rotates.

[0075] Of course, in other examples of this application, the drive mechanism 30 can also be implemented as a non-electric telescopic rod (not shown in the figure), with one end connected to the smoke baffle 10 and the other end connected to the second guide plate 22, so as to slow down the rotation speed of the second guide plate 22 and prevent the second guide plate 22 from falling too quickly under the action of gravity, thus affecting its service life. In addition, the drive mechanism 30 of this application can also be implemented as other drive components such as cylinders, hydraulic rods or linear motors, which will not be described in detail here.

[0076] It is worth noting that, since the guide hood 20 in the flow-guiding smoke-blocking device 1 can switch between the connected state and the stacked state, the flow-guiding smoke-blocking device 1 can not only form a triangular guide hood to move the negative pressure area downward, but also stack the first guide plate 21 and the second guide plate 22 on the inner side of the smoke-blocking plate 10 to be accommodated in the smoke collection hood 2. Therefore, the smoke collection hood 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 hood 2.

[0077] 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.

[0078] The above embodiments merely illustrate several implementation methods 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 the present invention.

Claims

1. A flow-guiding smoke-blocking device, characterized in that, include: The smoke baffle has an open state for opening the smoke inlet and a closed state for closing the smoke inlet; and The airflow guide includes a first airflow guide plate rotatably connected to the upper part of the smoke baffle and a second airflow guide plate rotatably connected to the lower part of the smoke baffle; when the smoke baffle is in the open state, the first airflow guide plate and the second airflow guide plate are connected to each other to form a triangular airflow guide inside the smoke baffle; when the smoke baffle is in the closed state, the first airflow guide plate and the second airflow guide plate are stacked on each other inside the smoke baffle for being accommodated within the smoke collection hood; The first guide plate has a first pivot portion rotatably connected to the upper edge of the smoke baffle and a first free end portion extending radially from the first pivot portion and used for engaging with the second guide plate; the second guide plate has a second pivot portion rotatably connected to the lower edge of the smoke baffle and a second free end portion extending radially from the second pivot portion and used for engaging with the first guide plate.

2. The flow-guiding smoke-blocking device according to claim 1, characterized in that, When the smoke baffle is in the open state, the second guide plate extends horizontally or obliquely upward in a direction away from the smoke baffle.

3. The flow-guiding smoke-blocking device according to claim 1, characterized in that, When the smoke baffle is in the closed state, the first guide plate is stacked between the second guide plate and the smoke baffle.

4. The flow-guiding smoke-blocking device according to claim 3, characterized in that, When the smoke baffle is in the closed state, the angle between the first guide plate and the smoke baffle is less than or equal to 15°, and the angle between the second guide plate and the smoke baffle is less than or equal to 20°.

5. The flow-guiding smoke-blocking device according to claim 1, characterized in that, The first guide plate further has a first limiting end extending from the first pivot portion toward a direction away from the first free end, so that when the smoke baffle is in the open state, the first limiting end abuts against the smoke baffle; the second guide plate further has a second limiting end extending from the second pivot portion toward a direction away from the second free end, so that when the smoke baffle is in the open state, the second limiting end abuts against the smoke baffle.

6. The flow-guiding smoke-blocking device according to claim 5, characterized in that, The first limiting end extends obliquely relative to the first free end; the second limiting end extends straight relative to the second free end.

7. The flow-guiding smoke-blocking device according to claim 1, characterized in that, The flow guide further includes a protective member protruding from the first free end or the second free end, so as to cover the gap between the first free end and the second free end when the first free end is connected to the second free end.

8. The flow-guiding smoke-blocking device according to claim 7, characterized in that, The protective component includes an overlapping plate extending upward from the second free end and a flexible pad fixed to the overlapping plate; the first guide plate further has an overlapping groove formed at the first free end and matching the overlapping plate.

9. The flow-guiding smoke-blocking device according to any one of claims 1 to 8, characterized in that, The flow-guiding smoke-blocking device further includes a driving mechanism disposed between the flow guide hood and the smoke-blocking plate, for driving the first flow guide plate and / or the second flow guide plate to rotate relative to the smoke-blocking plate, so as to adjust the included angle between the first flow guide plate and / or the second flow guide plate and the smoke-blocking plate.

10. The flow-guiding smoke-blocking device according to claim 9, characterized in that, The driving mechanism includes an electromagnet fixed to the smoke baffle and a magnetic attracting component fixed to the second guide plate and cooperating with the electromagnet; or, the driving mechanism includes an electromagnet fixed to the smoke baffle and the second guide plate is a magnetic attracting material component cooperating with the electromagnet.

11. The flow-guiding smoke-blocking device according to claim 9, characterized in that, The driving mechanism is an electric push-pull rod disposed on the smoke baffle, and the electric push-pull rod is driven and connected to the second guide plate.

12. The flow-guiding smoke-blocking device according to claim 9, characterized in that, The driving mechanism is a non-electric telescopic rod, one end of which is connected to the smoke baffle, and the other end of which is connected to the second guide plate.

13. The flow-guiding smoke-blocking device according to claim 9, characterized in that, The flow-guiding smoke-blocking device further includes an oil fume detector disposed on the flow guide hood and used for collecting oil fume concentration, and a controller communicatively connected to the oil fume detector and the drive mechanism; the controller is used to acquire oil fume concentration information collected by the oil fume detector to determine the current oil fume concentration level, and based on the current oil fume concentration level, control the drive mechanism to adjust the angle between the first flow guide plate and / or the second flow guide plate and the smoke-blocking plate.

14. A range hood, characterized in that, include: Fan box; A smoke hood is installed below the fan box and has a smoke inlet. as well as The flow-guiding smoke-blocking device as described in any one of claims 1 to 13, wherein the flow-guiding smoke-blocking device is rotatably disposed on the smoke collection hood for opening or closing the smoke inlet.

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