Liftable wall suction structure and range hood

Abstract

The utility model relates to a liftable wall suction structure and a range hood. The wall suction structure comprises a shell and a flue assembly arranged in the shell; the flue assembly comprises an adapter, a telescopic pipe and a smoke collector which are sequentially communicated from top to bottom, the top of the adapter is connected with an air inlet in the bottom of the extractor hood through a pipeline, the bottom of the smoke collector is closed, and a plurality of transverse grooves are formed in the front side face of the smoke collector and are distributed in the vertical direction; the rear side face of the shell is installed on a wall, the top of the shell is connected with the bottom of the extractor hood, an access hole is formed in the bottom of the shell, the shape of the access hole is consistent with the shape of the maximum cross section of the smoke collector, the access hole is used for providing a lifting channel for the smoke collector, and a sliding rail assembly is further arranged in the shell. The sliding rail assembly comprises a sliding frame and a sliding rod installed on the sliding frame in a sliding mode, the sliding frame is installed on the rear side face of the interior of the shell, and the sliding rod is connected with the rear side face of the smoke collector and slides in the vertical direction. The smoke suction effect can be improved, and occupation of the space above the cookware is reduced.

Description

Technical Field

[0001] The present disclosure relates to the technical field of range hoods, and in particular to a liftable wall suction structure and a range hood. Background Art

[0002] A range hood is a kitchen appliance that purifies the kitchen environment. It is installed above the kitchen stove and has a fan inside. The fan generates negative pressure. Due to the existence of the negative pressure zone in the range hood, the air around the air inlet is sucked in, and the oil smoke is also sucked in. However, since the distance between the pot and the air inlet of the range hood is relatively far, the negative pressure zone preferentially sucks in the oil smoke from near the air inlet, and the air flow near the negative pressure zone drives the air near the pot to flow to the air inlet layer by layer. This process is not only time-consuming, but also because the air outside the range of the range hood that does not contain oil smoke will also be sucked in due to the existence of the negative pressure zone, so the closer to the pot, the smaller the remaining effective suction force, resulting in a decrease in the suction effect. Summary of the invention

[0003] In order to solve at least one of the technical problems mentioned above, the present disclosure proposes a liftable wall suction structure and a range hood.

[0004] According to some embodiments of the present disclosure, a liftable wall suction structure is provided, which is applied to a range hood, the wall suction structure comprising a shell and a flue assembly arranged inside the shell; the flue assembly comprises an adapter, a telescopic tube and a smoke collector which are connected in sequence from top to bottom, the top of the adapter is connected to the air inlet at the bottom of the range hood through a pipe, the bottom of the smoke collector is closed, a front side surface of the smoke collector is provided with a plurality of transverse grooves, and the plurality of transverse grooves are arranged in a vertical direction; the rear side surface of the shell is mounted on a wall, the top of the shell is connected to the bottom of the range hood, the bottom of the shell is provided with inlet and outlet holes, the shape of the inlet and outlet holes is consistent with the shape of the maximum cross-section of the smoke collector, the inlet and outlet holes are used to provide a lifting channel for the smoke collector, and a slide rail assembly is further provided inside the shell, the slide rail assembly comprises a slide frame and a slide rod slidably mounted on the slide frame, the slide frame is mounted on the rear side surface inside the shell, the slide rod is connected to the rear side surface of the smoke collector, and the slide rod slides in a vertical direction.

[0005] Based on the above scheme, the flue assembly is raised and lowered by the telescopic tube. When cooking, the flue assembly is lowered so that the smoke collector is close to the cooker, thereby sucking away the oil fume gas generated by the cooker and enhancing the suction effect; after cooking, the flue assembly rises and is hidden inside the shell, thereby improving the neatness and aesthetics of the range hood; and the flue assembly is set on the wall to absorb smoke through the horizontal groove on the front side, which can reduce the space above the cooker occupied by the range hood, thereby improving the user experience.

[0006] In some possible implementations, the length of the smoke collector in the left-right direction is greater than its width in the front-back direction, and there is a distance between the front side of the smoke collector and the stove.

[0007] Based on the above solution, the overall shape of the smoke collector is flattened, which can reduce the interference of the flue component on the cooker while ensuring the suction effect of the range hood, and help increase the volume of the space above the cooker.

[0008] In some possible implementations, the front side surface of the smoke collector is an inner curved surface, and the distance between the left and right sides of the inner curved surface and the stove is smaller than the distance between the middle part of the inner curved surface and the stove.

[0009] Based on the above solution, the smoke collector with an inner arc surface design is more compatible with the shape of the cookware, which can not only avoid the interference of the smoke collector with the cookware, but also enhance and improve the smoking effect.

[0010] In some possible implementations, each of the transverse grooves is provided with an edge, and the edge is inclined downward, and a plurality of the transverse grooves form a louver groove structure.

[0011] Based on the above scheme, the opening direction of the horizontal groove of the smoke collector can be aligned with the cookware, thereby enhancing the suction effect and reducing the possibility of inhaling air without oil smoke, thereby achieving the effect of reducing suction loss and improving effective suction.

[0012] In some possible implementations, a bottom cover is detachably mounted on the bottom of the smoke collector, and an oil collecting groove is disposed on the top of the bottom cover.

[0013] Based on the above solution, providing a detachable bottom cover helps to reduce the difficulty of cleaning. The bottom cover of the smoke collector can be regularly disassembled to clean the oil collecting tank, thereby avoiding the accumulation of oil smoke particles inside the smoke collector and ensuring that the smoke collector is clean and hygienic.

[0014] In some possible embodiments, the slide rail assembly also includes a ball retainer, steel balls are respectively arranged on both sides of the ball retainer, the outer wall of the ball retainer contacts the inner wall of the slide, the inner wall of the ball retainer contacts the slide rod, and the slide rod slides in the slide through the ball retainer.

[0015] Based on the above solution, by adding a ball retainer equipped with steel balls, the sliding friction between the slide rod and the slide rack can be converted into rolling friction, thereby reducing the driving force required for the slide rod to slide and improving the smoothness of the flue assembly's lifting and lowering.

[0016] In some possible embodiments, an electric telescopic rod is provided at the inner top of the shell, the electric telescopic rod is placed vertically, the fixed end of the electric telescopic rod is connected to the inner top of the shell, the movable end of the electric telescopic rod is connected to the smoke collector, and the movable end of the electric telescopic rod drives the smoke collector to rise or fall.

[0017] Based on the above solution, by providing an electric telescopic rod, the automatic lifting and lowering of the flue assembly can be achieved, thereby improving the degree of automation of the range hood and further improving the user experience.

[0018] In some possible embodiments, a motor and a wire drum are provided at the inner top of the shell, the wire drum is sleeved on the output shaft of the motor, the output shaft of the motor is placed horizontally, a rope is wound around the wire drum, the other end of the rope is connected to the smoke collector, and the motor drives the wire drum to rotate to control the smoke collector to rise or fall.

[0019] Based on the above scheme, by setting up a motor and a wire reel, the automatic lifting and lowering of the flue assembly can be realized, thereby improving the automation level of the range hood and further improving the user experience.

[0020] In some possible implementations, the number of the flue assemblies is consistent with the number of stove openings, and the positions of the flue assemblies correspond to the positions of the stove openings.

[0021] Based on the above scheme, the flue components correspond one-to-one with the stove mouth, which can reduce the flow volume of a single flue component, help improve the flow uniformity of the oil fume gas in the flue component, and then enhance the smoking effect and improve the effective suction; moreover, different flue components are independent of each other and can adapt to the smoking needs of different cooking processes.

[0022] According to some other embodiments of the present disclosure, a range hood is provided, comprising a liftable wall suction structure according to any one of the above embodiments.

[0023] It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure.

[0024] Further features and aspects of the present disclosure will become apparent from the following detailed description of exemplary embodiments with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions and advantages in the embodiments of this specification or the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of this specification. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0026] Figure 1 A schematic structural diagram of a liftable wall suction structure according to an embodiment of the present disclosure is shown;

[0027] Figure 2 A schematic structural diagram showing a flue assembly of a wall suction structure according to an embodiment of the present disclosure;

[0028] Figure 3 A left side view of a smoke collector according to an embodiment of the present disclosure is shown;

[0029] Figure 4 A top view of a smoke collector according to an embodiment of the present disclosure is shown;

[0030] Figure 5 A rear view of a flue assembly according to an embodiment of the present disclosure is shown;

[0031] Figure 6 A structural diagram of a slide rail assembly according to an embodiment of the present disclosure is shown.

[0032] In the figure:

[0033] 1. Shell; 2. Adapter; 3. Telescopic tube; 4. Smoke collector; 41. Horizontal groove; 411. Edge; 5. Slide; 6. Slide rod; 7. Ball cage; 71. Steel ball. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of this specification to clearly and completely describe the technical solutions in the embodiments of this specification. Obviously, the described embodiments are only part of the embodiments of this specification, not all of the embodiments. Based on the embodiments in this specification, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product, or server that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products, or devices.

[0036] Various exemplary embodiments, features and aspects of the present disclosure will be described in detail below with reference to the accompanying drawings. The same reference numerals in the accompanying drawings represent elements with the same or similar functions. Although various aspects of the embodiments are shown in the accompanying drawings, the drawings are not necessarily drawn to scale unless otherwise specified.

[0037] The word “exemplary” is used exclusively herein to mean “serving as an example, example, or illustration.” Any embodiment described herein as “exemplary” is not necessarily to be construed as preferred or advantageous over other embodiments.

[0038] The term "and / or" herein is only a description of the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the term "at least one" herein represents any combination of at least two of any one or more of a plurality of. For example, including at least one of A, B, and C can represent including any one or more elements selected from the set consisting of A, B, and C.

[0039] Unless otherwise specified, the directions in this document should be understood as follows: the direction closer to the user is the front, and the direction away from the user is the rear.

[0040] In addition, in order to better illustrate the present disclosure, numerous specific details are given in the following specific embodiments. It should be understood by those skilled in the art that the present disclosure can also be implemented without certain specific details. In some examples, methods, means, components and circuits well known to those skilled in the art are not described in detail in order to highlight the subject matter of the present disclosure.

[0041] A range hood is a kitchen appliance that purifies the kitchen environment. It is installed above the kitchen stove and has a fan inside. The fan is used to generate negative pressure. Under the action of negative pressure, the fume gas from the pot is sucked into the range hood.

[0042] In the related art, whether it is a top-suction range hood or a side-suction range hood, the range hood is at a long distance from the stove top and the cooker, and the air inlet of the range hood is far away from the cooker, resulting in the negative pressure zone inside the range hood preferentially sucking air from near the air inlet, and then driving the air near the cooker to flow to the air inlet position layer by layer through the air flow near the negative pressure zone. This process is not only time-consuming, but also because the air outside the range of the range hood that does not contain oil smoke will also be sucked in due to the existence of the negative pressure zone, the closer to the cooker, the smaller the remaining effective suction force, resulting in a decrease in the suction effect.

[0043] In order to solve the above problems, the present disclosure provides a liftable wall suction structure. Figure 1 The wall suction structure includes a shell 1 and a flue assembly arranged inside the shell 1. The flue assembly is connected to the fan assembly inside the range hood, and a smoke outlet is arranged at the bottom of the flue assembly. The flue assembly can be raised or lowered in the vertical direction, so that the smoke outlet of the flue assembly is closer to the cookware; and the shell 1 serves as a decorative cavity, which provides a storage space for the flue assembly. When the flue assembly is not in use, it can be raised and stored inside the shell 1, thereby improving the overall aesthetics of the structure. The wall suction structure of the embodiment of the present disclosure establishes an external airflow channel that can be raised and lowered, so that the air inlet of the range hood is closer to the cookware, thereby avoiding the air without oil smoke near the bottom of the range hood from being sucked in, thereby improving the effective suction force.

[0044] The disclosed embodiments do not limit the number of flue assemblies, and the number of flue assemblies may be one or more than two. It is understandable that the flue assemblies should correspond to the stove burners one by one, that is, the number of flue assemblies is consistent with the number of stove burners, and the positions of the flue assemblies also correspond to the positions of the stove burners. Based on the above scheme, the flow volume of a single flue assembly can be reduced, which helps to improve the uniformity of the flow of oil fume gas in the flue assembly, thereby enhancing the smoking effect and improving the effective suction; and different flue assemblies are independent of each other and can adapt to the smoking needs of different cooking processes. For example, when only one burner is used, the flue assembly at the corresponding position can be lowered for smoking, and the other flue assemblies are hidden in the shell 1 and not used; or, when multiple burners are in use and the height of the pots on each burner is different, the lowering height of each flue assembly can be adjusted separately.

[0045] In the embodiments of the present disclosure, please refer to Figure 2The flue assembly specifically includes an adapter 2, a telescopic tube 3 and a smoke collector 4 which are connected in sequence from top to bottom. The top of the adapter 2 is connected to the air inlet at the bottom of the range hood through a pipe. The air inlet at the bottom of the range hood refers to the air inlet of the range hood air duct assembly, and the bottom of the adapter 2 is connected to the telescopic tube 3. The reason for setting the adapter 2 is that, on the one hand, the position of the flue assembly is not completely aligned with the position of the air inlet at the bottom of the range hood. Directly using the telescopic tube 3 to connect the air inlet will cause the deformation process of the telescopic tube 3 to be unstable, thereby affecting the lifting effect; on the other hand, the number of flue assemblies is not limited to one. If there are multiple flue assemblies connected to the air inlet at the same time, they need to be connected through the adapter 2 respectively.

[0046] It should be understood that the adapter 2 is not a necessary component, and in some possible embodiments, the adapter 2 can also be removed. For example, the number of flue components is one, and at the same time, the flue component is aligned with the air inlet of the range hood, and the size of the telescopic tube 3 of the flue component is consistent with the size of the air inlet / inlet duct of the range hood. In this case, the telescopic tube 3 can be directly connected to the air inlet / inlet duct of the range hood.

[0047] The bottom of the telescopic tube 3 is connected to the top of the smoke collector 4, the bottom of the smoke collector 4 is closed, and a plurality of transverse grooves 41 are provided on the front side of the smoke collector 4, and the plurality of transverse grooves 41 are arranged in the vertical direction, so the smoke collector is a closed box structure with an opening at the top and slots on the front side, and the top opening is used to connect the telescopic tube 3, and the slots on the front side serve as a smoke outlet. Based on the above scheme, when the flue assembly is in use, the telescopic tube 3 is extended to make the smoke collector 4 drop until the height of the bottom of the smoke collector 4 corresponds to the height of the pot mouth of the cooker, at which time the smoke collector 4 is located behind the cooker, and there is a distance between the two, and the negative pressure area of ​​the range hood is diffused along the main body of the range hood, the adapter 2, the telescopic tube 3, and the smoke collector 4 in turn, so that the transverse grooves 41 on the front side of the smoke collector 4 have suction, and the air containing oil smoke generated by the cooker is sucked into the transverse grooves 41. Compared with the top suction smoking and side suction smoking in the related technology, during the above-mentioned smoking process, the oil fume gas generated by the cooker is exposed to the kitchen environment for a shorter time, and the oil fume gas is quickly sucked into the flue assembly after being generated. In addition, since the travel distance of the oil fume gas from the cooker to the smoke collector 4 is short, the oil fume content in the space between the cooker and the main body of the range hood is low. The user's vision will not be disturbed by the oil fume when cooking, and a better field of vision can be obtained, thereby improving the user experience.

[0048] In the embodiment of the present disclosure, the function of the smoke collector 4 is to provide a position-variable smoking port, which is a plurality of vertically arranged transverse grooves 41 on the front side of the smoke collector 4. The reason for using a plurality of transverse grooves 41 to form the smoking port instead of opening a single large-sized hole is that a single large-sized hole will produce airflow exchange, and the inhaled oil smoke gas may escape from the smoke collector 4, which will also cause the negative pressure in the smoke collector 4 to not be well maintained, thereby causing the suction force to decrease and the smoking effect to deteriorate. It is understandable that the embodiment of the present disclosure does not limit the shape of the transverse groove 41, and the transverse groove 41 can be a straight-line transverse groove 41, or a corrugated, dotted-line or other-shaped transverse groove 41. A plurality of transverse grooves 41 are arranged vertically, that is, the smoking port is distributed vertically. Since the bottom of the smoke collector 4 corresponds to the height of the pot mouth of the cooker, the height of the smoking port is greater than the height of the pot mouth of the cooker. The oil fume gas generated by the cooker is sucked into the smoking port during the rising process. The vertically distributed transverse grooves 41 can ensure the amount of oil fume gas sucked in and avoid incomplete absorption of oil fume gas. The greater the vertical distribution height of the transverse grooves 41, the stronger the smoking effect.

[0049] In some possible implementations, when the total height of the smoking port remains unchanged, the plurality of vertically distributed transverse grooves 41 may be replaced by a plurality of laterally distributed vertical grooves.

[0050] Based on the above-mentioned solution of the transverse groove 41, in a further embodiment, please refer to Figure 3 Each transverse groove 41 is provided with an edge 411, and the edge 411 is inclined downward, and multiple transverse grooves 41 form a louver groove structure / louver structure, that is, the smoking port is a louver groove structure. The purpose of setting the louver groove structure is to align the smoking port with the pot mouth of the cookware, maintain the flow direction of the oil smoke through the edge 411 with a certain angle, reduce the inhalation of air without oil smoke, and thus enhance the smoking effect.

[0051] In some possible implementations, the edge 411 is rotatably mounted on the transverse groove 41. When the user replaces cookware of different heights, the user can manually adjust the angle between the edge 411 and the front side of the smoke collector 4 so that the smoking port is aligned with the pot mouth of the replaced cookware to ensure the smoking effect.

[0052] In the disclosed embodiment, the shape of the smoke collector 4 is not limited, and the smoke collector 4 may be a cylinder, an elliptical cylinder, a square cylinder or other shapes. It should be noted that the shape of the smoke collector 4 affects the smoking effect. Based on the above content, it can be known that the negative pressure zone of the smoke collector 4 is formed by the gradual diffusion of the negative pressure zone of the range hood. The flow channel volume should be avoided to be too large in the smoke collector 4, otherwise it will cause uneven air flow, thereby affecting the smoking effect. Since the smoke collector 4 is located behind the cooker, the structure of the smoke collector 4 should be flattened. In some specific embodiments, the length of the smoke collector 4 in the left-right direction is greater than its width in the front-back direction, and there is a distance between the front side of the smoke collector 4 and the cooker.

[0053] In order to further reduce the distance between the smoke collector 4 and the cookware, the shape of the smoke collector 4 may be adaptively adjusted. For example, in some possible implementations, please refer to Figure 4 The front side of the smoke collector 4 is an inner arc surface, and the distance between the left and right sides of the inner arc surface and the stove is smaller than the distance between the middle part of the inner arc surface and the stove. Since the shape of the pot mouth of the cooker is mostly circular, the smoke collector 4 with an inner arc surface design is more suitable for the shape of the cooker. When the distance between the smoke collector 4 and the cooker is shortened, the smoke collector 4 with the inner arc surface can avoid the interference of the smoke collector 4 with the cooker and can also enhance and improve the smoking effect.

[0054] In the wall suction structure disclosed in the present invention, since the bottom of the smoke collector 4 is closed, after long-term use, the inner bottom of the smoke collector 4 will inevitably accumulate oil smoke particles to form oil accumulation cooling. In order to facilitate the cleaning of the oil accumulation, the bottom of the smoke collector 4 is detachably installed with a bottom cover, and the user can manually remove the bottom cover to clean the internal oil accumulation of the smoke collector 4. In order to further reduce the difficulty of cleaning, an oil collecting groove can be set on the top of the bottom cover, and the oil collecting groove is used to stack and collect oil smoke particles. When cleaning the smoke collector 4, the user can directly clean the oil collecting groove after removing the bottom cover.

[0055] In the disclosed embodiment, the shell 1 serves to decorate the cavity. The rear side of the shell 1 is mounted on the wall. The top of the shell 1 is connected to the bottom of the range hood. The bottom of the shell 1 is provided with an inlet and outlet hole. The shape of the inlet and outlet hole is consistent with the shape of the maximum cross-section of the smoke collector 4. The inlet and outlet hole is used to provide a lifting channel for the smoke collector 4. In addition, a slide rail assembly is also provided inside the shell 1. Please refer to Figure 5 The slide rail assembly includes a slide 5 and a slide rod 6 slidably mounted on the slide 5. The slide 5 is mounted on the rear side of the interior of the shell 1. The slide rod 6 is connected to the rear side of the smoke collector 4, and the slide rod 6 slides in the vertical direction. The reason why the slide rail assembly is provided in the embodiment of the present disclosure is that, although the telescopic tube 3 in the flue assembly can independently realize the lifting function of the smoke collector 4, there is instability in the deformation process of the telescopic tube 3. For example, when the telescopic tube 3 is a corrugated tube, when the smoke collector 4 is lifted for contraction, if there is a deviation in the direction of the force during the process, local disorder of the corrugated tube section may occur, causing the telescopic tube 3 to bend, thereby causing the inlet and outlet of the smoke collector 4 and the bottom of the shell 1 to be stuck. Therefore, the provision of the slide rail assembly can ensure that the telescopic tube 3 always remains in a vertical state, ensuring that the lifting function of the flue assembly is normally realized.

[0056] In a specific embodiment, in order to reduce the driving force required for the slide rail assembly, please refer to Figure 6The slide rail assembly further includes a ball retainer 7, on both sides of which steel balls 71 are respectively arranged, the outer wall of the ball retainer 7 contacts the inner wall of the slide frame 5, the inner wall of the ball retainer 7 contacts the slide bar 6, and the slide bar 6 slides in the slide frame 5 through the ball retainer 7. By adding the ball retainer 7 equipped with steel balls 71, the sliding friction between the slide bar 6 and the slide frame 5 can be converted into rolling friction, reducing the driving force required for the slide bar 6 to slide, and improving the smoothness of the flue assembly when it is lifted and lowered.

[0057] In the embodiment of the present disclosure, the driving method for lifting and lowering the wall suction structure is not limited. That is to say, the wall suction structure can be pushed and pulled manually by the user, or it can be automatically lifted and lowered by electric, pneumatic or other transmission parts.

[0058] In a specific embodiment, the wall suction structure is electrically driven. Specifically, an electric telescopic rod (not shown in the figure) is provided on the inner top of the shell 1. The electric telescopic rod is placed vertically, and the fixed end of the electric telescopic rod is connected to the inner top of the shell 1. The movable end of the electric telescopic rod is connected to the smoke collector 4. The movable end of the electric telescopic rod drives the smoke collector 4 to rise or fall.

[0059] In another specific embodiment, the wall suction structure is electrically driven. Specifically, a motor and a wire drum (not shown in the figure) are arranged on the inner top of the shell 1. The wire drum is sleeved on the output shaft of the motor. The output shaft of the motor is placed horizontally. A wire rope is wound on the wire drum. The other end of the wire rope is connected to the smoke collector 4. The motor drives the wire drum to rotate to control the smoke collector 4 to rise or fall.

[0060] An embodiment of the present disclosure further provides a range hood, which includes a liftable wall suction structure according to any one of the above embodiments.

[0061] The embodiments of the present disclosure have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The selection of terms used herein is intended to best explain the principles of the embodiments, practical applications, or technical improvements in the market, or to enable other persons of ordinary skill in the art to understand the embodiments disclosed herein.

Claims

1. A liftable wall suction structure, used in a range hood, characterized by: The wall suction structure comprises a shell (1) and a flue assembly arranged inside the shell (1); The flue assembly comprises an adapter (2), a telescopic pipe (3) and a smoke collector (4) which are connected in sequence from top to bottom, the top of the adapter (2) is connected to the air inlet at the bottom of the range hood via a pipeline, the bottom of the smoke collector (4) is closed, and a front side surface of the smoke collector (4) is provided with a plurality of transverse grooves (41), and the plurality of transverse grooves (41) are arranged in a vertical direction; The rear side of the shell (1) is installed on the wall, the top of the shell (1) is connected to the bottom of the range hood, the bottom of the shell (1) is provided with an inlet and outlet hole, the shape of the inlet and outlet hole is consistent with the shape of the maximum cross-section of the smoke collector (4), the inlet and outlet hole is used to provide a lifting channel for the smoke collector (4), and the interior of the shell (1) is also provided with a slide rail assembly, the slide rail assembly includes a slide frame (5) and a slide rod (6) slidably mounted on the slide frame (5), the slide frame (5) is installed on the rear side of the interior of the shell (1), the slide rod (6) is connected to the rear side of the smoke collector (4), and the slide rod (6) slides in a vertical direction.

2. A liftable wall suction structure according to claim 1, characterized in that: The length of the smoke collector (4) in the left-right direction is greater than its width in the front-back direction, and there is a distance between the front side of the smoke collector (4) and the stove.

3. The liftable wall suction structure according to claim 2 is characterized in that: The front side surface of the smoke collector (4) is an inner arc surface, and the distance between the left and right side parts of the inner arc surface and the stove is smaller than the distance between the middle part of the inner arc surface and the stove.

4. The liftable wall suction structure according to claim 1 is characterized in that: Each of the transverse grooves (41) is provided with an edge (411), and the edge (411) is inclined downward, and a plurality of the transverse grooves (41) form a louver groove structure.

5. The liftable wall suction structure according to claim 1 is characterized in that: A bottom cover is detachably mounted on the bottom of the smoke collector (4), and an oil collecting groove is arranged on the top of the bottom cover.

6. The liftable wall suction structure according to claim 1, characterized in that: The slide rail assembly also includes a ball retainer (7), and steel balls (71) are respectively arranged on both sides of the ball retainer (7). The outer wall of the ball retainer (7) contacts the inner wall of the slide (5), and the inner wall of the ball retainer (7) contacts the slide rod (6). The slide rod (6) slides in the slide (5) through the ball retainer (7).

7. The liftable wall suction structure according to claim 1, characterized in that: An electric telescopic rod is provided at the inner top of the shell (1), the electric telescopic rod is placed vertically, the fixed end of the electric telescopic rod is connected to the inner top of the shell (1), the movable end of the electric telescopic rod is connected to the smoke collector (4), and the movable end of the electric telescopic rod drives the smoke collector (4) to rise or fall.

8. The liftable wall suction structure according to claim 1, characterized in that: A motor and a wire drum are provided at the inner top of the shell (1); the wire drum is sleeved on the output shaft of the motor, and the output shaft of the motor is placed horizontally; a wire rope is wound around the wire drum, and the other end of the wire rope is connected to the smoke collector (4); the motor drives the wire drum to rotate to control the smoke collector (4) to rise or fall.

9. The liftable wall suction structure according to claim 1, characterized in that: The number of the flue assemblies is consistent with the number of stove openings, and the positions of the flue assemblies correspond to the positions of the stove openings.

10. A range hood, characterized in that: A liftable wall suction structure comprising any one of claims 1-9.

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