Telescopic smoke blocking device and range hood

Abstract

The invention relates to a telescopic smoke blocking device and a range hood, which can reduce the section width of a smoke collecting cavity while ensuring the oil smoke suction effect so as to meet the ultra-thin design requirement of the range hood. The telescopic smoke blocking device comprises a smoke blocking plate body which is arranged on the front side of a smoke collecting cavity in a turnover mode so as to open or close a smoke inlet; the flow guide cover assembly is telescopically arranged on the inner side of the smoke baffle body so as to be switched between an extension state and a contraction state along with the up-and-down overturning of the smoke baffle body; when the smoke baffle body is turned upwards to open the smoke inlet, the flow guide cover assembly stretches relative to the smoke baffle body to be in the stretching state, and a flow guide cover with a triangular section is formed on the inner side of the smoke baffle body; when the smoke baffle body turns downwards to close the smoke inlet, the flow guide cover assembly is contracted relative to the smoke baffle body to be in the contracted state and used for being contained in the smoke collecting cavity.

Description

Technical Field

[0001] The invention relates to the technical field of range hoods, and in particular to a telescopic smoke shielding device and a range hood. Background Art

[0002] With the improvement of people's quality of life, range hoods have become one of the indispensable kitchen appliances in modern families. They are usually installed above the kitchen stove, using the principles of fluid dynamics to absorb the fumes generated during the cooking process, and using filters to filter out some grease particles, thereby purifying the kitchen environment and improving people's comfort when cooking.

[0003] In order to expand the smoke collection range, traditional range hoods usually use a flipping smoke baffle to expand the smoke collection area. However, the smoke collection area formed by flipping the smoke baffle upward is far away from the smoke source, and the negative pressure is high, resulting in an unsatisfactory oil fume extraction effect. In addition, there is a gap at the connection between the top edge of the smoke baffle and the range hood housing due to the need for flipping, resulting in part of the oil fume escaping from the gap when the oil fume enters the smoke collecting chamber along the smoke baffle, causing oil stains to accumulate at the bottom of the fan box all year round, which not only reduces the oil fume extraction effect, but also affects the user experience. To this end, the applicant sets an L-shaped air guide cover on the inner wall of the smoke baffle, so that when the range hood is working, it can not only use the L-shaped air guide cover to move the negative pressure area downward to improve the oil fume extraction effect, but also use the L-shaped air guide cover to change the flow path of the oil fume, so that only a very small part of the oil fume rises to the gap when it flows into the smoke collecting chamber, which helps to reduce the escape of oil fume.

[0004] However, since the range hood will use a smoke baffle to close the smoke inlet when not in operation, and the L-shaped air deflector will be located within the smoke collecting chamber to reduce space occupancy and improve the overall aesthetics; at the same time, in order to ensure a certain fume absorption effect, the L-shaped air deflector must be large enough; therefore, the smoke collecting chamber of the existing range hood needs to have a sufficient depth to accommodate the L-shaped air deflector, otherwise the L-shaped air deflector will have structural interference with the back plate of the smoke collecting chamber, which will result in the depth of the smoke collecting chamber cannot be reduced, making it difficult to achieve an ultra-thin design of the range hood. Summary of the invention

[0005] In view of the problem that the smoke collecting chamber in the existing range hood needs to ensure sufficient depth to avoid structural interference when accommodating the L-shaped air deflector, the overall width of the smoke collecting chamber is still relatively wide when viewed from the side, making it difficult to achieve an ultra-thin design of the range hood. The present application provides a telescopic smoke shielding device and a range hood, which can reduce the cross-sectional width of the smoke collecting chamber while ensuring the oil fume extraction effect, so as to meet the ultra-thin design requirements of the range hood.

[0006] In order to achieve at least one of the above advantages or other advantages and purposes of the present invention, the present invention provides a telescopic smoke barrier device, comprising:

[0007] A smoke baffle body, which is used to be flippably disposed on the front side of the smoke collecting chamber to open or close the smoke inlet; and

[0008] The air deflector assembly is telescopically arranged on the inner side of the smoke shield body to switch between an extended state and a retracted state as the smoke shield body is flipped up and down; when the smoke shield body is flipped upward to open the smoke inlet, the air deflector assembly is extended relative to the smoke shield body to be in the extended state, and forms an air deflector with a triangular cross-section on the inner side of the smoke shield body; when the smoke shield body is flipped downward to close the smoke inlet, the air deflector assembly is retracted relative to the smoke shield body to be in the retracted state, and is used to be accommodated in the smoke collecting chamber.

[0009] In some embodiments of the present application, the air deflector assembly includes a fixed cover body fixed to the smoke shield body and having a telescopic opening, and a movable cover body movably arranged 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 contracted state, the movable cover body at least partially retracts from the telescopic opening into the fixed cover body.

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

[0011] In some embodiments of the present application, the angle between the upper plate body and the smoke shield body is between 15° and 60°; the angle between the lower plate body and the smoke shield body is between 15° and 60°.

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

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

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

[0015] In some embodiments of the present application, the first guide plate body is parallel to the upper plate body; the second guide plate body is parallel to the lower plate body; the first guide plate body and the second guide plate body both have free ends bent outward; the upper plate body and the lower plate body both have free ends bent inward.

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

[0017] In some embodiments of the present application, the first guide plate body can be slidably disposed on the inner wall surface of the upper plate body.

[0018] In some embodiments of the present application, the telescopic smoke shield device further includes a guiding mechanism, which is arranged between the movable cover body and the smoke shield body, and is used to guide the movable cover body to approach or move away from the smoke shield body to extend or retract the fixed cover body.

[0019] In some embodiments of the present application, the guide mechanism is a telescopic connecting rod or an electric telescopic rod having two ends respectively connected to the smoke baffle body and the movable cover body.

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

[0021] Fan box;

[0022] A smoke collecting chamber is arranged below the fan box and is provided with a smoke inlet; and

[0023] Any of the telescopic smoke blocking devices described above, wherein the telescopic smoke blocking device is flippably arranged in the smoke collecting chamber to open or close the smoke inlet.

[0024] In summary, when the smoke baffle body is flipped upward to open the smoke inlet, the air deflector assembly is extended relative to the smoke baffle body to be in an extended state, and a air deflector with a triangular cross-section is formed on the inner side of the smoke baffle body, so that the negative pressure area formed on the inner side of the smoke baffle body can be moved downward, thereby improving the oil fume absorption effect; at the same time, the air deflector with a triangular cross-section can also change the flow path of the oil fume, so that less oil fume escapes through the gap between the smoke baffle body and the smoke collecting chamber, and can guide the oil stains flowing down from the fan box into the oil cup at the bottom of the smoke collecting chamber, thereby avoiding the accumulation of oil stains on the inner surface of the smoke baffle body and preventing the oil stains from dripping onto the cooking utensils along the inner surface of the smoke baffle body.

[0025] When the smoke baffle body flips downward to close the smoke inlet, the deflector assembly shrinks relative to the smoke baffle body to be in a retracted state, and is used to be accommodated in the smoke collecting chamber, so that the smoke collecting chamber can be designed to be ultra-thin without structural interference with the deflector assembly. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0027] Figure 2 Shown above Figure 1 A schematic cross-sectional view of a range hood shown;

[0028] Figure 3 A schematic diagram showing a state in which the air guide cover assembly of the range hood according to the above embodiment of the present application is in a closed state;

[0029] Figure 4 Shown above Figure 3 A schematic cross-sectional view of a range hood shown;

[0030] Figure 5 A modified example of the range hood according to the above embodiment of the present application is shown, wherein the air guide cover assembly is in an open state;

[0031] Figure 6 A schematic diagram showing a state in which the air guide cover assembly of the range hood according to the above-mentioned modified example of the present application is in a closed state.

[0032] Description of main component symbols:

[0033] 1. Telescopic smoke shield device; 10. Smoke shield body; 20. Air deflector assembly; 21. Fixed shield body; 210. Telescopic opening; 211. Upper plate body; 212. Lower plate body; 213. Side plate body; 22. Movable shield body; 221. First air deflector body; 222. Second air deflector body; 223. Sealing plate body; 30. Guide mechanism; 31. Telescopic connecting rod; 311. First pull rod; 312. Second pull rod; 32. Electric push-pull rod; 2. Smoke collecting chamber; 3. Smoke inlet; 4. Fan box.

[0034] The above description of the main component symbols is combined with the accompanying drawings and specific implementation methods to further illustrate the present invention in detail. DETAILED DESCRIPTION

[0035] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0036] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0037] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0038] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0040] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0041] Considering that the smoke collecting chamber in the existing range hood needs to have sufficient depth to avoid structural interference when accommodating the L-shaped air guide cover, the overall width of the smoke collecting chamber is still relatively wide when viewed from the side, making it difficult to achieve an ultra-thin design of the range hood. Therefore, the present application creatively provides a telescopic smoke shielding device and a range hood, which can reduce the cross-sectional width of the smoke collecting chamber while ensuring the oil smoke extraction effect, so as to meet the ultra-thin design requirements of the range hood.

[0042] Specifically, according to another aspect of the present application, Figures 1 to 4As shown, one embodiment of the present application provides a range hood, which may include a fan box 4, a smoke collecting chamber 2 disposed below the fan box 4 and provided with a smoke inlet 3, and a telescopic smoke shielding device 1 that is flippably disposed in the smoke collecting chamber 2 and is used to open or close the smoke inlet 3, so as to absorb oil smoke when the smoke inlet 3 is opened. It is understandable that the range hood of the present application may also include, but is not limited to, an oil cup, a water tank, a water receiving box and / or a sensor to assist in completing the oil smoke absorption function, which will not be described in detail in the present application.

[0043] More specifically, if Figures 1 to 4 As shown, the telescopic smoke shield device 1 may include a smoke shield body 10 and a guide cover assembly 20. The smoke shield body 10 is used to be flippably arranged at the front side of the smoke collecting chamber 2 to open or close the smoke inlet 3. The guide cover assembly 20 is telescopically arranged on the inner side of the smoke shield body 10 to switch between an extended state and a retracted state as the smoke shield body 10 is flipped up and down.

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

[0045] And as Figure 3 and Figure 4 As shown, when the smoke baffle body 10 is flipped downward to close the smoke inlet 3, the air deflector assembly 20 is contracted relative to the smoke baffle body 10 to be in a contracted state, and is used to be accommodated in the smoke collecting chamber 2, so that the smoke collecting chamber 2 can be designed to be ultra-thin without structural interference with the air deflector assembly 20. It can be understood that the upward flipping of the smoke baffle body 10 refers to the flipping of the smoke baffle body 10 toward the direction close to the fan box 4 to flip away from the smoke collecting chamber 2 and open the smoke inlet 3, and the downward flipping of the smoke baffle body 10 refers to the flipping of the smoke baffle body 10 away from the fan box 4 to get close to the smoke collecting chamber 2 and close the smoke inlet 3; the inner side of the smoke baffle body 10 refers to the side of the smoke baffle body 10 facing the smoke collecting chamber 2.

[0046] For example, Figure 2 and Figure 4As shown, the air deflector assembly 20 may include a fixed cover body 21 fixed to the smoke baffle body 10 and having a telescopic opening 210, and a movable cover body 22 movably arranged on the fixed cover body 21. When the air deflector assembly 20 is in an extended state, the movable cover body 22 extends out of the fixed cover body 21 from the telescopic opening 210 to connect with the fixed cover body 21 to form an air deflector with a triangular cross-section, ensuring that while achieving a downward shift in the negative pressure height, it has a better smoke and oil guiding effect, which is beneficial to reduce the escape of oil smoke and avoid oil pollution from dripping. When the air deflector assembly 20 is in a retracted state, the movable cover body 22 at least partially retracts from the telescopic opening 210 to the fixed cover body 21 to occupy a smaller space, so as to be accommodated in the ultra-thin smoke collecting chamber 2 without causing structural interference with the smoke collecting chamber 2.

[0047] It is worth noting that in the above examples of this application, Figure 1 and Figure 2 As shown, when the air deflector assembly 20 is in the extended state, the movable cover body 22 can only partially extend from the fixed cover body 21 from the telescopic opening 210, so as to directly form a deflector with a triangular cross-section with the fixed cover body 21. In other examples of the present application, the air deflector assembly 20 may further include one or more connecting covers disposed between the fixed cover body 21 and the movable cover body 22, so that when the air deflector assembly 20 is in the extended state, the movable cover body 22 can completely extend from the fixed cover body 21 from the telescopic opening 210, so as to form a deflector with a triangular cross-section together with the fixed cover body 21 by means of the connecting covers, which will not be described in detail in the present application.

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

[0049] For example, the angle γ1 between the upper plate body 211 and the smoke shield body 10 can be between 15° and 60°, that is, γ1∈[15°,60°]; the angle γ2 between the lower plate body 212 and the smoke shield body 10 can be between 15° and 60°, that is, γ2∈[15°,60°].

[0050] Alternatively, if Figure 2 As shown, the angle γ1 between the upper plate body 211 and the smoke baffle body 10 is greater than the angle γ2 between the lower plate body 212 and the smoke baffle body 10, that is, γ1>γ2, so that the lower plate body 212 is closer to the smoke baffle body 10 than the upper plate body 211, so that while the oil smoke can be better guided into the smoke collecting chamber 2 through the lower plate body 212, the oil stains can also be better guided into the smoke collecting chamber 2 through the upper plate body 211 to be collected by the oil cup arranged at the bottom of the smoke collecting chamber 2.

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

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

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

[0054] Alternatively, if Figure 2 and Figure 4 As shown, the first guide plate body 221 is substantially parallel to the upper plate body 211, and the second guide plate body 222 is substantially parallel to the lower plate body 212. In this way, the oily dirt guided through the upper plate body 211 can smoothly flow through the first guide plate body 221 to drip into the smoke collecting chamber 2; at the same time, the oily smoke guided through the lower plate body 212 is guided to the smoke inlet 3 of the smoke collecting chamber 2 through the second guide plate body 222 without changing the flow direction, so as to better achieve the smoke and oil guiding effect.

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

[0056] It is worth noting that in the above examples of this application, Figure 2 and Figure 4 As shown, the first guide plate body 221 is integrally connected to the second guide plate body 222, that is, the first guide plate body 221 and the second guide plate body 222 can be formed by bending a whole guide plate. Of course, in other examples of the present application, the first guide plate body 221 and the second guide plate body 222 can also be spliced ​​by welding or riveting, which will not be described in detail in the present application.

[0057] Alternatively, if Figure 2 and Figure 4 As shown, the first deflector body 221 and the second deflector body 222 both have free ends bent outward; at the same time, the upper plate body 211 and the lower plate body 212 both have free ends bent inward to achieve a better overlap fit. In this way, when the deflector assembly 20 is in an extended state, the free end of the first deflector body 221 fits the inner side of the free end of the upper plate body 211; at the same time, the free end of the second deflector body 222 fits the inner side of the free end of the lower plate body 212, thereby forming a better overlap sealing effect, which can prevent oil from flowing into the internal space of the deflector assembly 20 through the overlap between the first deflector body 221 and the upper plate body 211, and can also prevent oil smoke from entering the internal space of the deflector assembly 20 through the overlap between the second deflector body 222 and the lower plate body 212.

[0058] It is worth noting that the ends of the sealing plate 223 and the side plate 213 mentioned in the present application can also be designed to be bent so as to fit each other when the air deflector assembly 20 is in the extended state, thereby forming a better sealing and limiting effect and preventing the movable cover 22 from being separated from the fixed cover 21. In addition, one of the plates in the movable cover 22 can slide and extend along the inner wall of the corresponding plate on the fixed cover 21, so as to improve the telescopic stability of the air deflector assembly 20.

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

[0060] It is worth noting that in the above two examples of the present application, when the deflector assembly 20 is in a retracted state, the first deflector body 221 and the second deflector body 222 of the movable cover body 22 are correspondingly located on the inner sides of the upper plate body 211 and the lower plate body 212 of the fixed cover body 21, so that the movable cover body 22 is completely accommodated in the internal space of the fixed cover body 21.

[0061] Of course, in other examples of the present application, one of the plates of the movable cover body 22 can slide and stretch along the outer wall of the corresponding plate body on the fixed cover body 21, which can still improve the telescopic stability of the air deflector assembly 20. For example, the first air deflector body 221 can be slidably disposed on the outer wall of the upper plate body 211, so that when the air deflector assembly 20 is in a retracted state, the first air deflector body 221 is located on the outer side of the upper plate body 211, and the second air deflector body 222 is located on the inner side of the lower plate body 212, so that the movable cover body 22 is partially accommodated in the inner space of the fixed cover body 21.

[0062] In addition, in order to better guide the movable cover 22 to extend or retract relative to the fixed cover 21, as shown in FIG. Figure 2 and Figure 4As shown, the telescopic smoke shield device 1 of the present application may further include a guiding mechanism 30 arranged between the movable cover body 22 and the smoke shield body 10, for guiding the movable cover body 22 to approach or move away from the smoke shield body 10 to extend or retract the fixed cover body 21, so that the deflector assembly 20 can smoothly switch between the extended state and the contracted state.

[0063] Optionally, the guide mechanism 30 has a guiding direction parallel to the extending direction of the upper plate body 211 , and is used to guide the movable cover body 22 to slide along the upper plate body 211 .

[0064] For example, 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 shield body 10, and the other end of which is connected to the movable cover body 22. In this way, when the smoke shield body 10 is flipped upward to open the smoke inlet 3, the movable cover body 22 slides downward under its own gravity to put the air guide cover assembly 20 in an extended state; at this time, the telescopic link 31 is extended under the drive of the movable cover body 22 and applies a pulling force to the movable cover body 22, so as to slow down the sliding speed of the movable cover body 22, so as to prevent the movable cover body 22 from falling too fast under the action of gravity and affecting its service life. When the smoke baffle body 10 is turned down to close the smoke inlet 3, the movable cover body 22 abuts against the back plate of the smoke collecting chamber 2 and is pushed back, so that the movable cover body 22 slides upward to put the air guide cover assembly 20 in a retracted state; at this time, the telescopic connecting rod 31 is retracted under the drive of the movable cover body 22, so that the movable cover body 22 can be stored in the cavity of the smoke collecting chamber 2 without interference. It can be understood that the telescopic connecting rod 31 mentioned in the present application is implemented as a non-powered guide mechanism.

[0065] Alternatively, if Figure 2 and Figure 4 As shown, the telescopic connecting rod 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] Alternatively, if Figure 2 and Figure 4 As shown, the telescopic connecting rod 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 body 22. The first pull rod 311 can be slidably mounted on the periphery of the second pull rod 312 to guide the first guide plate body 221 of the movable cover body 22 to slide along the wall of the upper plate body 211.

[0067] In addition, in a modified example of the present application, 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 body 10, and the other end of which is connected to the movable cover body 22. In this way, when the smoke baffle body 10 is flipped upward to open the smoke inlet 3, the electric push-pull rod 32 can push the movable cover body 22 to slide downward slowly so that the air guide cover assembly 20 is in an extended state. When the smoke baffle body 10 is flipped downward to close the smoke inlet 3, the electric push-pull rod 32 can pull the movable cover body 22 to slide upward so that the air guide cover assembly 20 is in a retracted state, and the movable cover body 22 can be stored in the cavity of the smoke collection chamber 2 without interference without abutting the back plate of the smoke collection chamber 2. It can be understood that the electric push-pull rod 32 mentioned in the present application is implemented as a powered guide mechanism; in addition, the guide mechanism 30 of the present application can also be implemented as other guide components such as cylinders, hydraulic rods or linear motors, which will not be described in detail in the present application.

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

[0069] In addition, since the air deflector assembly 20 in the telescopic smoke shielding device 1 can switch between an extended state and a retracted state, the telescopic smoke shielding device 1 can not only form an air deflector with a triangular cross-section to move the negative pressure area downward, but also can overlap the fixed cover body 21 and the movable cover body 22 on the inner side of the smoke shielding plate body 10 to be accommodated in the smoke collecting chamber 2. Therefore, the smoke collecting chamber 2 in the range hood of the present application can be implemented as a wedge-shaped cover body that is wide at the top and narrow at the bottom, or a rectangular cover body with equal width at the top and bottom, so as to meet the ultra-thin design of the smoke collecting chamber 2.

[0070] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, 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 only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of this application.

Claims

1. Telescopic smoke barrier device, characterized in that: include: A smoke baffle body is used to be flippably arranged at the front side of the smoke collecting chamber to open or close the smoke inlet; and The air deflector assembly is telescopically arranged on the inner side of the smoke shield body to switch between an extended state and a retracted state as the smoke shield body is flipped up and down; when the smoke shield body is flipped upward to open the smoke inlet, the air deflector assembly is extended relative to the smoke shield body to be in the extended state, and forms an air deflector with a triangular cross-section on the inner side of the smoke shield body; when the smoke shield body is flipped downward to close the smoke inlet, the air deflector assembly is retracted relative to the smoke shield body to be in the retracted state, and is used to be accommodated in the smoke collecting chamber.

2. The telescopic smoke barrier device according to claim 1, characterized in that: 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 arranged 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 contracted state, the movable cover body at least partially retracts from the telescopic opening into the fixed cover body.

3. The telescopic smoke barrier device according to claim 2, characterized in that: The fixed cover body includes an upper plate body fixedly connected to the upper part of the smoke baffle body and a lower plate body fixedly connected to the lower part of the smoke baffle body; the upper plate body and the lower plate body gradually extend backward from the inner wall of the smoke baffle body to form a trapezoidal cover body.

4. The telescopic smoke barrier device according to claim 3, characterized in that: The angle between the upper plate body and the smoke shield body is between 15° and 60°; the angle between the lower plate body and the smoke shield body is between 15° and 60°.

5. The telescopic smoke barrier device according to claim 4, characterized in that: The angle between the upper plate body and the smoke baffle body is greater than the angle between the lower plate body and the smoke baffle body; when the smoke baffle body is flipped upward to open the smoke inlet, the sum of the angle between the lower plate body and the smoke baffle body and the flipping angle of the smoke baffle body is less than or equal to 90°.

6. The telescopic smoke barrier device according to claim 3, characterized in that: The fixed cover body also includes a pair of side plates respectively located at the left and right sides of the upper plate body and the lower plate body, and the two side plates are respectively fixedly connected to the left and right sides of the upper plate body and the lower plate body.

7. The telescopic smoke barrier device according to any one of claims 3 to 6, characterized in that: The movable cover body includes a first guide plate body for overlapping with the upper plate body and a second guide plate body for overlapping with the lower plate body, and the second guide plate body extends obliquely from one end of the first guide plate body to form an L-shaped cover body.

8. The telescopic smoke barrier device according to claim 7, characterized in that: The first guide plate body is parallel to the upper plate body; the second guide plate body is parallel to the lower plate body; the first guide plate body and the second guide plate body both have free ends bent outward; the upper plate body and the lower plate body both have free ends bent inward.

9. The telescopic smoke barrier device according to claim 7, characterized in that: The movable cover body also includes a pair of sealing plate bodies respectively located at the left and right sides of the first guide plate body and the second guide plate body, and the two sealing plate bodies are respectively fixedly connected to the left and right sides of the first guide plate body and the second guide plate body.

10. The telescopic smoke barrier device according to claim 7, characterized in that: The first guide plate body is slidably disposed on the inner wall surface of the upper plate body.

11. The telescopic smoke barrier device according to any one of claims 2 to 6, characterized in that: The invention also comprises a guiding mechanism, which is arranged between the movable cover body and the smoke baffle body and is used for guiding the movable cover body to approach or move away from the smoke baffle body so as to extend or retract the fixed cover body.

12. The telescopic smoke barrier device according to claim 11, characterized in that: The guide mechanism is a telescopic connecting rod or an electric telescopic rod with two ends respectively connected to the smoke baffle body and the movable cover body.

13. A range hood, characterized in that: include: Fan box; A smoke collecting chamber is arranged below the fan box and is provided with a smoke inlet; as well as The telescopic smoke barrier device according to any one of claims 1 to 12, wherein the telescopic smoke barrier device is flippably arranged in the smoke collecting chamber to open or close the smoke inlet.

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