A smoke collecting cavity of a range hood and a range hood

Abstract

The application discloses a smoke collecting cavity of an oil fume exhauster, and relates to the technical field of oil fume exhausters. The shell of the smoke collecting cavity is composed of an upper shell and a lower shell which are connected by buckling; an outer frame is detachably mounted on the outer periphery of the shell, and the outer frame shields the connecting position of the upper shell and the lower shell. The application has the following beneficial effects: the outer frame is arranged on the connecting position of the upper shell and the lower shell, so that the structural strength of the connecting position is improved; meanwhile, the connecting position is shielded, so that dust and insects cannot enter the connecting position, and the connecting position is kept clean and hygienic; in addition, the outer frame is detachably arranged, so that the user can conveniently disassemble, repair and / or clean the smoke collecting cavity, and the use experience of the user is improved.

Description

Technical Field

[0001] This invention belongs to the field of range hoods, specifically, it relates to a smoke collection chamber and a range hood. Background Technology

[0002] Currently, most range hoods on the market have a one-piece molded smoke collection chamber, which suffers from high defect rates during production, high mold costs and manufacturing expenses, and a relatively traditional appearance. To address these issues, a new design has emerged that uses separate upper and lower shells for the smoke collection chamber, which can then be reassembled to reduce the high defect rate.

[0003] However, the disadvantages of split manufacturing are that dust easily accumulates at the joints, making it difficult to keep clean; and the overall structural strength of the smoke collection chamber cannot be guaranteed, especially the joint between the upper and lower shells on the outer periphery of the smoke collection chamber, which is prone to deformation and cracking due to impacts, affecting the user experience.

[0004] In view of this, the present invention is proposed. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and to provide a smoke collection chamber and a range hood, wherein the connection of the smoke collection chamber is wrapped by a matching outer frame to improve the overall structural strength of the smoke collection chamber.

[0006] To solve the aforementioned technical problems, the basic concept of the present invention is as follows: a smoke collection chamber for a range hood, the shell of which is formed by an upper shell and a lower shell fastened together; an outer frame is detachably installed on the outer periphery of the shell, the outer frame shielding the connection between the upper and lower shells. By setting the outer frame at the connection between the upper and lower shells, the structural strength of the connection is improved; at the same time, shielding the connection prevents dust and insects from entering, ensuring cleanliness and hygiene; furthermore, the detachable outer frame facilitates disassembly, repair, and / or cleaning of the smoke collection chamber by the user, improving the user experience.

[0007] Furthermore, the side of the outer frame facing the outer periphery of the shell is the inner facade of the outer frame;

[0008] The main structure of the outer frame is composed of long decorative strips that extend along the outer periphery of the shell and at least cover the front and left and right sides of the shell.

[0009] Furthermore, the decorative strip is provided with fixing ribs on the upper and lower sides, and each fixing rib is connected to the upper shell and / or the lower shell.

[0010] Furthermore, each fixing rib is a horizontal flange set on the upper and lower sides of the decorative strip on the inner facade, and each fixing rib is set in the same direction as the inner surface of the corresponding connected decorative strip; each fixing rib is set flush with the corresponding side end of the decorative strip.

[0011] Furthermore, fixing grooves are provided on the upper and lower sides of the outer periphery of the shell, and each fixing groove is a pressed shape that is recessed into the shell along the corresponding side edge; the longitudinal section of each side of the outer periphery with fixing grooves is a Z-shape with the opening facing the inside of the shell.

[0012] Furthermore, the outer periphery of the upper shell is provided with a downwardly folded side rib; a fixing groove that is recessed into the upper shell is provided at the connection between the side rib of the upper shell and the outer periphery of the upper shell.

[0013] The outer periphery of the lower shell is provided with upwardly folded side ribs; at the connection between the side ribs of the lower shell and the outer periphery of the lower shell, there is a fixing groove that is recessed into the lower shell.

[0014] Each fixed slot has a vertical slot wall of the same height and a horizontal slot wall of the same width.

[0015] Furthermore, the upper and lower shells of the housing are connected by a connecting structure; the fixing ribs on the upper and lower sides of the outer frame are respectively engaged with the corresponding fixing grooves on the upper and lower sides of the housing; the inner surface of the outer frame is in contact with the outer surface of the side ribs of the upper and lower shells respectively;

[0016] The connecting structure has a recessed area on the outer periphery of the shell, which forms a gap with the inner surface of the outer frame. This gap allows the decorative strip to be cushioned by the impact when the smoke collection chamber is subjected to significant shaking or bumps during manufacturing or transportation, thus reducing the impact on the shell, preventing deformation, and improving the impact resistance of the smoke collection chamber.

[0017] Furthermore, the upper and lower shells are respectively provided with continuous fixing grooves extending along the connection between the side ribs and the corresponding shells; the upper and lower sides of the inner facade of the outer frame are respectively provided with continuous fixing ribs extending along the corresponding side edges.

[0018] The outer frame is slidably connected to the corresponding fixing grooves through each fixing rib.

[0019] Furthermore, the bottom of the casing is provided with a guide plate that protrudes upwards; the guide plate has an auxiliary smoke inlet on the inclined surface formed by the protrusion.

[0020] A range hood, wherein the range hood employs the smoke collection chamber of a range hood as described above.

[0021] After adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art: A smoke collection chamber for a range hood, the shell of the smoke collection chamber is composed of an upper shell and a lower shell fastened together; an outer frame is detachably installed on the outer periphery of the shell, and the outer frame shields the connection between the upper and lower shells. By setting the outer frame at the connection between the upper and lower shells, the structural strength of the connection is improved; at the same time, shielding the connection prevents dust and insects from entering the connection, ensuring the cleanliness and hygiene of the connection; then, the detachable setting of the outer frame facilitates the user to disassemble, repair and / or clean the smoke collection chamber, improving the user experience; finally, an upwardly protruding guide plate is set at the bottom of the smoke collection chamber to improve the oil guiding and smoke collecting effect of the guide plate, and improve the smoke extraction effect of the smoke collection chamber.

[0022] At the same time, the present invention has a simple structure, significant effects, and is suitable for widespread use.

[0023] The specific embodiments of the present invention will now be described in further detail with reference to the accompanying drawings. Attached Figure Description

[0024] The accompanying drawings, as part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments and descriptions of the invention are used to explain the invention, but do not constitute an undue limitation of the invention. Obviously, the drawings described below are merely some embodiments, and those skilled in the art can obtain other drawings based on these drawings without creative effort. In the drawings:

[0025] Figure 1 This is a schematic diagram of the appearance of a range hood according to an embodiment of the present invention;

[0026] Figure 2 This is a schematic diagram of the smoke collection chamber according to an embodiment of the present invention;

[0027] Figure 3 This is a side view of the housing according to an embodiment of the present invention;

[0028] Figure 4 This is an embodiment of the present invention. Figure 3 Enlarged view of a portion of region A in the middle;

[0029] Figure 5 This is a schematic diagram of the outer frame of an embodiment of the present invention;

[0030] Figure 6 This is a schematic diagram of the appearance of the guide plate according to an embodiment of the present invention;

[0031] Figure 7 This is a bottom view of the guide vane according to an embodiment of the present invention.

[0032] In the diagram: 1. Shell; 2. Deflector; 3. Main housing; 11. Lower shell; 12. Upper shell; 13. Back plate; 14. Rounded chamfer; 15. Side rib; 16. Connecting structure; 17. Outer frame; 18. Oil screen; 19. Oil cup; 111. Smoke inlet; 112. Lighting assembly; 113. Strong fixing hole; 141. Rounded chamfer; 151. Fixing groove; 161. Lower connecting rib; 162. Upper connecting rib; 163. Reinforcing part; 164. Connecting part; 165. Rivet hole ; 171. Decorative strip; 172. Fixing rib; 173. Fitting fixing hole; 174. Exterior facade; 175. Interior facade; 21. Flow guide; 22. Auxiliary smoke guide; 23. Auxiliary flow guide; 24. Baffle rib; 25. Snap-on structure; 26. Rotary connection structure; 27. Oil drain port; 211. Arc edge; 212. Straight edge; 221. Auxiliary smoke guide port; 231. Arc surface; 232. Vertical surface; 251. Bracket; 252. Snap-on base; 253. Snap-on groove.

[0033] It should be noted that these accompanying drawings and textual descriptions are not intended to limit the scope of the invention in any way, but rather to illustrate the concept of the invention to those skilled in the art by referring to specific embodiments. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0035] In the description of this invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are 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 limiting this invention.

[0036] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0037] Example 1

[0038] like Figures 1 to 4As shown, Embodiment 1 of the present invention provides a range hood, the main body of which includes a main casing 3, a smoke collection chamber, and a baffle plate 2; furthermore, the range hood is also equipped with common range hood accessories such as an oil filter 18, lights, and a control panel. The main unit of the range hood is equipped with a fan to provide air power to draw the fumes below the range hood into the range hood.

[0039] In an embodiment of the present invention, the housing 1 of the smoke collection chamber includes a lower housing 11, an upper housing 12, and a back plate 13; the housing 1 of the smoke collection chamber has a tower-shaped structure that gradually rises upward from the front and left and right sides towards the center and is vertically arranged at the rear; the smoke collection chamber is fixedly connected to the rear side of the main box 3; a conical smoke collection chamber is formed at the bottom of the housing 1, and a smoke inlet 111 is provided at the top of the housing 1 of the smoke collection chamber; the smoke inlet 111 is rectangular in shape; the front side and the left and right sides of the smoke inlet 111 are respectively connected to the top of the inclined surface of the corresponding side of the lower housing 11; the smoke inlet 111 is connected to the inner cavity of the main box 3, and an oil screen 18 is provided at the smoke inlet 111. When the range hood is running, the oil fumes flow from the lower housing 11 towards the smoke inlet 111, are filtered by the oil screen 18 provided on the smoke inlet 111, and then flow into the cavity of the main box 3; the oil screen 18 can filter the passing oil fumes and reduce the oil content in the oil fumes entering the inner cavity of the main box 3.

[0040] In an embodiment of the present invention, the upper shell 12 of the housing 1 of the smoke collection chamber covers the front side and the upper surfaces of the left and right sides of the lower shell 11; the top edge of the upper shell 12 is flush with the corresponding side of the air outlet of the lower shell 11; the rear side of the upper shell 12 and the rear side of the lower shell 11 are located on the same vertical plane; the rear sides of the lower shell 11 and the upper shell 12 are respectively covered by vertically arranged back plates 13, and the rear edges of the upper shell 12 and the lower shell 11 are respectively provided with vertical mating connecting ribs in the direction of the smoke collection chamber; the back plate 13 is fixed to the corresponding mating connecting ribs by riveting; the upper end of the back plate 13 is fixedly connected to the rear side of the main box 3.

[0041] With the above-mentioned configuration, by vertically mounting the back plate 13 on the rear side of the smoke collection chamber, making the rear side of the smoke collection chamber a vertical plane, it is not only convenient to install the smoke collection chamber against the wall, but also the bottom opening of the smoke collection chamber naturally faces downward after installation against the wall, reducing the workload of the installers. In addition, it also allows the rear side of the main box 3, which is connected to the air outlet, to contact the wall. On the one hand, this facilitates the fixed installation of the main box 3, and on the other hand, it reduces the vibration generated by the fan inside the main box 3 during operation by fixing it to the wall, thus preventing the internal structural connections of the range hood from loosening due to the shaking of the main box 3. This improves the overall structural strength and durability of the range hood, while also reducing the noise generated during the operation of the range hood and improving the user experience.

[0042] In an embodiment of the present invention, the rear side of the smoke collection chamber is placed against the wall, with its front side and left and right sides facing outwards, forming the outer periphery of the smoke collection chamber. The outer periphery of the upper housing 12 corresponds to the outer periphery of the lower housing 11, ensuring that the outer peripheries of the upper housing 12 and the lower housing 11 are both located on the same vertical plane. This ensures that the outer periphery of the smoke collection chamber is vertically positioned, resulting in uniform stress on the edges of the smoke collection chamber, reducing the likelihood of deformation and extending the service life of the range hood cavity. Simultaneously, the range hood cavity is more streamlined and regular, conforming to the aesthetic preferences of the user's kitchen design and enhancing the user's visual experience.

[0043] In an embodiment of the present invention, the front side of the lower housing 11 of the smoke collection chamber housing 1 is connected to the left and right sides respectively with rounded chamfers 141 of the same size; the rounded chamfers 141 of the lower housing 11 are all quarter-circle arcs with the same radius, and the two ends of the rounded chamfers 141 of the lower housing 11 are flush with the front side and the corresponding side of the lower housing 11 respectively; the front side of the upper housing 12 is also connected to the left and right sides respectively with rounded chamfers 141, and the rounded chamfers 141 of the upper housing 12 are the same shape as the rounded chamfers 141 of the corresponding side of the lower housing 11 and are located on the same vertical central axis.

[0044] With the above configuration, the two corner surfaces at the front ends of the upper housing 12 and lower housing 11 of the smoke collection chamber are respectively set as rounded chamfers 141. Compared with the smoke collection chamber with the same specifications and parameters, which are set as right angles, the corner surfaces of the smoke collection chamber have better impact resistance and are less prone to deformation. This can effectively reduce the probability of deformation or cracking of the housing 1 due to violent shaking or drops during transportation or assembly. More importantly, compared with right angles, the rounded chamfers 141 have a smaller extension length to the outside of the smoke machine cavity at the connection points with the front side and the left and right sides of the smoke collection chamber, thus... To a certain extent, this addresses the pain point of top-mounted range hoods being prone to head bumps. Furthermore, even if a head bump does occur, the rounded chamfered corner (141°) is smoother and has no sharp edges compared to right-angled corners, effectively reducing the risk of injury to users. This alleviates users' reluctance to purchase top-mounted range hoods due to the risk of head bumps in the smoke collection chamber, making users more confident in using them and improving the user experience. Additionally, the rounded corners are visually simpler and more aesthetically pleasing, enhancing the overall appearance of the range hood and improving the user's visual experience.

[0045] Meanwhile, the two rounded chamfers 141 on the front side of the upper housing 12 and the lower housing 11 are set in the same shape, and the two rounded chamfers 141 set on the upper and lower sides are located on the same vertical plane to improve the consistency of the appearance of the smoke collection chamber; and it is convenient for the installer to horizontally position the upper housing 12 and the lower housing 11 of the smoke machine cavity during installation, and reduce the left and right misalignment of the smoke collection chamber.

[0046] In an embodiment of the present invention, the area formed by extending from both ends of each rounded chamfer 141 toward the corresponding corner of the air outlet on the surface of the lower housing 11 is set as a fan-shaped plane; this also improves the structural strength of the lower housing 11; the area formed by extending from both ends of each rounded chamfer 141 toward the corresponding corner of the air outlet on the surface of the upper housing 12 is set as a fan-shaped plane; through the above settings, the production and manufacturing of the lower housing 11 can be facilitated and the product defect rate can be reduced.

[0047] In an embodiment of the present invention, the outer periphery of the lower housing 11 is folded upward to form a side rib 15 of the lower housing 11; the outer periphery of the upper housing 12 is folded downward to form a side rib 15 of the upper housing 12; and the lower housing 11 and the chamfered edge 141 of the lower housing 11 are also provided with side ribs folded in the corresponding direction; the outer surface of each side rib 15 of the upper housing 12 and the outer surface of the corresponding side rib 15 of the lower housing 11 are located on the same vertical plane. The upward folded side ribs 15 can improve the impact resistance of the smoke machine cavity, avoid deformation of the outer periphery of the smoke collection cavity, thereby reducing the stability requirements of the smoke collection cavity during production, assembly, and transportation; and the design of the folded side ribs 15 makes the smoke collection cavity easier to press into shape, reducing the defect rate during the production process, thereby reducing production costs.

[0048] In an embodiment of the present invention, the upper shell 12 and the lower shell 11 of the smoke collection chamber are fixedly connected by a connecting structure 16. The connecting structure 16 includes a lower connecting rib 161 and an upper connecting rib 162. The lower connecting rib 161 is provided on the side rib 15 of the lower shell 11. The lower connecting rib 161 includes a reinforcing portion 163 that bends and extends towards the inside of the lower shell 11, and a connecting portion 164 that bends and extends upward from the reinforcing portion 163. The structural strength of the lower connecting rib 161 is enhanced by providing the inwardly bent reinforcing portion 163, making the lower connecting rib 161 less prone to deformation. The upper connecting rib 162 is provided on the side rib 15 of the upper shell 12. The upper connecting rib 162 first bends and extends towards the inside of the upper shell 12 and then bends and extends upward. This arrangement has the same bending effect as the lower connecting rib 161, thereby improving the structural strength of the upper connecting rib 162.

[0049] In embodiments of the present invention, lower connecting ribs 161 are spaced apart on the side ribs 15 of the lower housing 11; more specifically, lower connecting ribs 161 parallel to the extending direction of the front side ribs 15 are respectively provided at both ends of the side ribs 15 of the lower housing 11, and lower connecting ribs 161 parallel to the extending direction of the corresponding side ribs 15 are respectively provided on the left and right sides of the lower housing 11, and one end of the lower connecting ribs 161 on the left and right sides extends to the rear end of the corresponding side of the lower housing 11; upper connecting ribs 162 opposite to each connecting rib of the lower housing 11 are provided on the side ribs 15 of the upper housing 12, and the upper connecting ribs 162 are of the same length as the corresponding lower connecting ribs 161; no lower connecting ribs 161 are provided on the side ribs 15 of the arc chamfer 141 of the lower housing 11, and correspondingly, no upper connecting ribs 162 are provided on the side ribs 15 of the arc chamfer 141 of the upper housing 12.

[0050] With the above-mentioned arrangement, the spaced arrangement of the connecting structure 16 on the front side of the housing 1 can save on the production cost of the smoke collection chamber. Moreover, compared with the continuous connecting structure 16 on the side rib 15, the shorter connecting structure 16 has stronger structural strength and is less prone to deformation. At the same time, in order to facilitate the manufacturing of the upper and lower housings of the smoke collection chamber, no connecting ribs are provided on the side rib 15 at the rounded chamfer 141. Under the premise of ensuring that the connecting structure 16 can achieve a stable connection, the design difficulty of the housing 1 is greatly reduced, the defect rate, mold cost and manufacturing cost are reduced, the production efficiency of the smoke collection chamber is improved and the production cost is reduced.

[0051] The lower connecting rib 161 is disposed opposite to the upper connecting rib 162 on the corresponding side, and the length of the reinforcing part 163 of each upper connecting rib 162 is at least longer than the thickness of the lower connecting rib 161 relative to the length of the reinforcing part 163 of the corresponding lower connecting rib 161.

[0052] Through the above arrangement, the relative arrangement of the length of the reinforcing part 163 of the upper connecting rib 162 and the length of the corresponding lower connecting rib 161 creates a misalignment value between each upper connecting rib 162 and the corresponding lower connecting rib 161. This ensures that when the upper shell 12 is installed on the lower shell 11, each upper connecting rib 162 is positioned inside the corresponding lower connecting rib 161. This allows for horizontal positioning of the lower shell 11 relative to the upper shell 12 during the pre-installation of the smoke collection chamber shell 1, through the cooperation of each upper connecting rib 162 and the corresponding lower connecting rib 161. This reduces the positioning difficulty during the installation of the smoke collection chamber shell 1. Furthermore, the upper connecting rib 162 and the corresponding lower connecting rib 161 do not directly contact each other, reducing the production schedule requirements for the connecting structure 16. During installation, the upper shell 12 does not need to maintain a high degree of parallelism with the lower shell 11 to complete the installation of the upper shell 12 and the lower shell 11. The connection reduces the difficulty of production; at the same time, there is no force between the upper connecting rib 162 and the lower connecting rib 161, which avoids deformation of the connection structure 16 due to errors during production.

[0053] Meanwhile, by staggeredly interlocking the upper connecting ribs 162 with the corresponding lower connecting ribs 161, the outer periphery and side ribs 15 of the upper shell 12 are aligned with the corresponding outer periphery and side ribs 15 of the lower shell 11. At the same time, the upper connecting ribs 162 can be matched with the lower connecting ribs 161 for interlocking and limiting, thereby improving the flatness of the smoke collection chamber.

[0054] In an embodiment of the present invention, the upper housing 12 and the lower housing 11 are fixed together by riveting. Specifically, two riveting holes 165 are respectively provided on the connecting portion 164 located on the front side of the lower housing 11 and the upper housing 12. The riveting holes 165 on the same connecting portion 164 are spaced apart, and the two riveting holes 165 are respectively located at both ends of the connecting portion 164. Three riveting holes 165 are respectively provided on the connecting portions 164 on the left and right sides of the upper housing 12 and the lower housing 11. The three riveting holes 165 on each connecting portion 164 on the left and right sides are respectively located at the middle and both ends of the corresponding connecting portion 164. The riveting holes 165 of the connecting portion 164 of the upper housing 12 and the corresponding connecting portion 164 of the lower housing 11 are concentrically arranged and fixedly connected by riveting.

[0055] With the above configuration, the smoke collection chamber can be manufactured separately as three parts: an upper shell 12, a lower shell 11, and a back plate 13. These parts are then fixedly connected to form the shell 1 of the smoke collection chamber, thereby reducing the defect rate during product production and also reducing mold and manufacturing costs. The connecting structure 16, through front-to-back misalignment, facilitates pre-installation while providing horizontal limitation. Furthermore, each connecting part 164 of the upper shell 12 and the lower shell 11 can be vertically arranged, so that when the smoke collection chamber is fixedly connected by the connecting structure 16, it only bears the force generated by gravity, thereby minimizing the deformation of the connecting structure 16 of the shell 1 due to its own weight. The fixed connection is achieved by inserting rivets into the matching rivet holes 165, using riveting to fix the structure. While ensuring a firm fixation, this significantly reduces the time for fixed assembly, improves production efficiency, and the riveting method is simple to implement with a low error rate, reducing the defect rate in manufacturing and effectively ensuring the high-quality and efficient production of the smoke collection chamber.

[0056] In this embodiment of the invention, the edge of the smoke inlet 111 at the bottom of the lower housing 11 is provided with a fixed flange, and an oil mesh 18 is provided at the bottom of the lower housing 11 corresponding to the smoke inlet 111; the oil mesh 18 covers the smoke inlet 111; two claw structures are symmetrically arranged side by side at the bottom of the lower housing 11 behind the smoke inlet 111, one end of each claw is fixed to the bottom of the lower housing 11, and the corresponding other end extends downward and bends to the rear side of the lower housing 11; an oil mesh 18 mounting hole is opened on the rear side of the oil mesh 18 corresponding to the claw, and the oil mesh 18 is detachably fixed to the bottom of the lower housing 11 by the claw engaging with the oil mesh 18 mounting hole; two screw holes are arranged side by side on the front side of the oil mesh 18, and a groove is provided on the lower surface of the oil mesh 18 around the screw holes. The internal recessed structure accommodates the screw head, preventing the top of the screw head from protruding above the lower surface of the oil filter 18. The bottom of the lower housing 11 has screw holes arranged side-by-side on the front side of the smoke inlet 111, corresponding to the screw holes on the front side of the oil filter 18. By screwing the screws into the corresponding screw holes on the oil filter 18 and the bottom plate of the lower housing 11, the front side of the oil filter 18 is fixed to the bottom of the lower housing 11, further securing the oil filter 18 to the smoke inlet 111. This arrangement ensures a stable connection between the oil filter 18 and the bottom of the lower housing 11, guaranteeing the stability of both the oil filter 18 and the range hood using it.

[0057] In an embodiment of the present invention, lighting components 112 are symmetrically arranged at both ends of the bottom front side of the lower housing 11 to supplement light when there is insufficient light, so as to improve the user experience when cooking.

[0058] Example 2

[0059] The difference between Embodiment 2 of the present invention and the above embodiments is that this embodiment further elaborates on the structural features of the smoke collection chamber in Embodiment 1:

[0060] In an embodiment of the present invention, the smoke collection chamber is composed of a shell 1 that is horizontally arranged and has a downward-facing smoke inlet 111; an outer frame 17 is provided on the outer periphery of the shell 1, and the outer frame 17 at least covers the front side and the left and right sides of the outer periphery of the shell 1.

[0061] In an embodiment of the present invention, the main structure of the outer frame 17 is a decorative strip 171, which is a long flat plate with the same width as the outer periphery of the shell 1. The decorative strip 171 is a U-shaped long flat plate with one concave side as the inner surface 175 and the other side as the outer surface 174. The inner surface 175 of the decorative strip 171 covers part of the outer periphery of the smoke collection chamber shell 1. The two ends of the outer frame 17 extend to the rear ends of the left and right sides of the shell 1, respectively, and the two ends of the outer frame 17 cover the rear ends of the left and right sides of the outer periphery of the smoke collection chamber.

[0062] In the embodiments of the present invention, the front side of the outer periphery of the shell 1 is connected to the left and right sides with rounded chamfers 141 respectively; the inner surface 175 of the outer frame 17 is respectively attached to each rounded chamfer 141 of the shell 1; the two corners of the decorative strip 171 are set as rounded corners, and the outer surface 174 of the outer frame 17 is bent at each rounded chamfer of the shell 1 to form a rounded chamfer surface 14.

[0063] With the above-mentioned design, the outer frame 17 can cover the gaps between the outer peripheral connecting structures 16 of the housing 1, preventing dust, insects, and fumes from entering the cavity between the upper housing 12 and the lower housing 11 through the gaps between the two connecting structures 16, thus keeping the range hood clean and hygienic. Furthermore, the outer frame 17 can cover and conceal the riveted fixing positions of the smoke collection chamber connecting structure 16, making the smoke collection chamber more aesthetically pleasing. Simultaneously, by surrounding and covering the edges of the smoke collection chamber, the structural strength of the smoke collection chamber can be strengthened, its impact resistance improved, preventing damage to the machine during transportation and drops, and enhancing the protection of the internal components of the smoke collection chamber. Finally, the curved corner design makes the overall appearance of the range hood more beautiful and harmonious, increasing users' desire to purchase the range hood provided in this embodiment.

[0064] In an embodiment of the present invention, the outer frame 17 is a decorative strip 171 arranged along the outer periphery of the range hood. The inner surface 175 of the decorative strip 171 is in contact with the front and left and right side ribs 15 of the upper shell 12 and the lower shell 11 of the smoke collection cavity, respectively. Furthermore, the upper shell 12 and the lower shell 11 are fixedly connected by upper connecting ribs 162 and lower connecting ribs 161, which are respectively arranged to bend into the smoke collection cavity and extend towards each other, so that the connecting structure 16 has a recessed area into the shell 1 on the outer periphery side of the shell 1.

[0065] With the above configuration, the recessed areas formed on the outer periphery of the front and left and right sides of the housing 1 by the connecting structure 16 and the gaps between the connecting structures 16 allow the decorative strip 171 of the outer frame 17 to be fitted onto the outer periphery of the housing 1. This creates a clearance area between the inner vertical surface 175 of the decorative strip 171 of the outer frame 17 and the housing 1. When the smoke collection chamber is subjected to significant shaking or impact during manufacturing or transportation, the impact received by the decorative strip 171 can be buffered through the clearance area, thereby reducing the impact on the housing 1, preventing deformation of the housing 1, and improving the impact resistance of the smoke collection chamber.

[0066] In this embodiment of the invention, the two ends of the outer frame 17 correspond to the rear ends of the left and right sides of the outer periphery of the housing 1, respectively; the housing 1 has strong fixing holes 113 respectively opened at the rear ends of the side ribs 15 on the left and right sides of the outer periphery; in this embodiment, the strong fixing holes 113 are respectively opened on the lower housing 11, and the outer periphery of the strong fixing holes 113 is provided with a pressing shape that is recessed to the inner side of the lower housing 11; the two ends of the decorative strip 171 of the outer frame 17 are provided with mating fixing holes 173 corresponding to the strong fixing holes 113 of the lower housing 11, and the outer surface 174 of the decorative strip 171 is provided with an inward-facing surface 175 on the outer periphery of the mating fixing holes 173. The decorative strip 171 has a recessed molding; the mating fixing hole 173 of the decorative strip 171 is coaxially arranged with the corresponding strong fixing hole 113 of the lower housing 11; each strong fixing hole 113 and the corresponding mating fixing hole 173 are screw holes or through holes, and each mating fixing hole 173 of the outer frame 17 is fixedly connected to the corresponding strong fixing hole 113 of the housing 1 by screws; at the same time, by setting molding on the side ribs 15 on both sides of the decorative strip 171 and the lower housing 11, the structural strength of the decorative strip 171 and the side ribs 15 of the lower housing 11 is enhanced, and the strong fixing is avoided from causing deformation or cracking of the decorative strip 171 or the side ribs 15 of the lower housing 11.

[0067] Example 3

[0068] The difference between Embodiment 3 of the present invention and the above embodiments is that this embodiment provides a connection method between the outer frame 17 and the housing 1:

[0069] In an embodiment of the present invention, the decorative strips 171 of the outer frame 17 are respectively provided with horizontal flanges on the upper side of the inner facade 175, forming fixing ribs 172 of the outer frame 17. The lower side of the outer frame 17 is provided with the same fixing ribs 172 corresponding to the upper side. The upper side of the side ribs 15 of the upper shell 12 and the lower side of the side ribs 15 of the lower shell 11 are respectively provided with fixing grooves 151 that are recessed into the shell 1, corresponding to the fixing ribs 172 on the corresponding side of the outer frame 17. The longitudinal section of each fixing groove 151 on the side rib 15 is L-shaped or inverted L-shaped. Each fixing groove 151 of the upper shell 12 is provided on the same vertical plane 232 as the corresponding fixing groove 151 of the lower shell 11. The longitudinal section of the side of the outer periphery of the shell 1 is Z-shaped. The height of the vertical groove wall of each fixing groove 151 is the same as the thickness of the fixing rib 172, and the width of the horizontal groove wall of each fixing groove 151 is the same as the extension length of the fixing rib 172; the outer frame 17 is engaged with the corresponding fixing groove 151 through the fixing rib 172 and is locked onto the outer periphery of the shell 1.

[0070] Through the above-described configuration, the decorative strip 171 is fixed to the housing 1. Furthermore, the vertical alignment of the fixing groove 151 ensures that the fixing rib 172 on the upper side of the outer frame 17 is flush with the upper surface of the side rib 15 on the outer periphery of the upper housing 12, and the fixing rib 172 on the lower surface of the outer frame 17 is flush with the lower surface of the side rib 15 on the outer periphery of the lower housing 11, thereby improving the consistency between the outer frame 17 and the housing 1. Simultaneously, the horizontal alignment of the fixing groove 151 allows the outer frame 17 to fit snugly against the front and left / right sides of the housing 1. The inner surface 175 of the outer frame 17 can be fitted against the outer periphery of the side ribs 15 of the upper and lower housings 12 and 11. Moreover, the vertical sidewall of the fixing groove 151 and the front end of the fixing rib 172 can abut against each other without gaps, preventing dust accumulation in the gaps and keeping the connection between the outer frame 17 and the housing 1 clean, thus improving the user experience.

[0071] In embodiments of the present invention, the fixing grooves 151 provided on the side ribs 15 of the upper shell 12 and the lower shell 11 are continuous fixing grooves 151 extending along the front side and the left and right sides of the outer perimeter; correspondingly, the upper and lower sides of the inner facade 175 of the U-shaped outer frame 17 are continuous fixing ribs 172 extending along the corresponding side edges, so that the outer frame 17 is inserted into the shell 1 from front to back on the corresponding side wall of the outer perimeter of the shell 1 by the fixing ribs 172 on the left and right sides.

[0072] With the above configuration, by extending each fixing groove 151 along the front and left and right sides of the corresponding outer periphery of the housing 1, the fixing groove 151 is a connected groove that runs from the left rear end of the corresponding side of the housing 1, sequentially from the left side rib 15, the arc chamfer 141 side rib 15 where the left side intersects with the front side, the front side rib 15, the arc chamfer 141 side rib 15 where the front side intersects with the right side rib 15, the right side rib 15, and finally to the rear end of the right side rib 15. This allows the left and right side ribs 15 to form a slide that allows the fixing rib 172 of the outer frame 17 to slide. This allows the outer frame 17 to be slidably fastened onto the outer periphery of the housing 1. Simultaneously, each fixing rib 172 of the outer frame 17 is correspondingly positioned extending along the corresponding side edge of the inner facade 175, so that when the outer frame 17 is fastened onto the housing 1, each fixing rib 172 abuts against the corresponding fixing groove 151. This improves the consistency between the outer frame 17 and the housing 1, enhances the overall appearance of the smoke collection chamber, and prevents dust accumulation at the connection between the fixing groove 151 and the fixing rib 172, maintaining the cleanliness of the fixing groove 151 and improving the user experience.

[0073] In another embodiment of the present invention, each fixing groove 151 is spaced apart on the side rib 15 of the corresponding side of the housing 1; the fixing rib 172 of the corresponding outer frame 17 is configured to cooperate with the corresponding fixing groove 151. Preferably, in order to facilitate the manufacturing of the housing 1 and the outer frame 17, the side rib 15 of the arc chamfer 141 at the connection between the front side and the left and right sides of the housing 1 is not provided with fixing groove 151; correspondingly, the inner surface 175 of the outer frame 17 is not provided with fixing groove 151 on the upper and lower sides of the two arc chamfer surfaces 14. The outer frame 17 has a certain elasticity, and the outer frame 17 has elastic deformation that allows the two ends corresponding to the left and right sides of the housing 1 to deform to the corresponding sides by a certain angle; by deforming the left and right sides of the outer frame 17 to the sides, the outer frame 17 is opened to the left and right sides by a certain angle, so that the outer frame 17 can be directly engaged with the side wall of the outer periphery of the housing 1 of the smoke collection chamber, thereby making the outer frame 17 and the housing 1 engage as one.

[0074] Example 4

[0075] The difference between Embodiment 4 of the present invention and the above embodiments is that this embodiment provides a guide plate 2 structure:

[0076] In an embodiment of the present invention, a guide plate 2 is provided below the smoke inlet 111 of the smoke collection chamber; the outer edge of the guide plate 2 does not contact the lower housing 11, and a main smoke inlet is provided between the outer edge of the guide plate 2 and the conical lower surface of the lower housing 11 for the passage of oil fumes; when the range hood is working, the fan in the main box 3 operates to draw the gas below the smoke collection chamber into the inner cavity of the main box 3. The guide plate 2 provided below the smoke collection chamber reduces the ventilation area around the guide plate 2, so that a negative pressure zone is formed between the guide plate 2 and the conical bottom of the smoke collection chamber, thereby increasing the wind speed flowing around the guide plate 2 and improving the suction capacity of the oil fumes below the smoke collection chamber.

[0077] In an embodiment of the present invention, the guide plate 2 is a rectangular plate with rounded corners; baffles 24 extending vertically upward from the upper surface of the guide plate 2 are provided on the edges around the guide plate 2; an oil drain port 27 is provided at the bottom of the baffles 24 on the rear side of the guide plate 2; the oil drain port 27 extends along the straight edge 212 on the rear side of the guide plate 2; a strip-shaped oil cup 19 is provided on the rear side of the guide plate 2; a connector for connecting to the rear bottom of the lower housing 11 is provided on the top of the rear side wall of the strip-shaped oil cup 19; the upward opening of the oil cup 19 is located directly below the oil drain port 27 of the guide plate 2.

[0078] In an embodiment of the present invention, a guide portion 21 is provided on the guide plate 2, which gradually protrudes upward from the rear side to the front side of the guide plate 2; the guide portion 21 is a left-right symmetrical curved plate with a slope that gradually decreases from the top to the bottom; the top and bottom edges of the guide portion 21 are respectively horizontally arranged and are parallel to the front side edge of the guide portion 21.

[0079] With the above configuration, by providing an inclined guide section 21 on the guide plate 2, oil droplets falling onto the guide section 21 can flow smoothly to the rear side of the guide plate 2 through the inclined surface of the guide section 21, thus avoiding oil droplets remaining on the surface of the guide plate 2 and accumulating impurities, reducing the difficulty of cleaning the guide plate 2 for users and improving the user experience; at the same time, by setting the guide section 21 to gradually become parallel to the bottom plate of the guide plate 2, the velocity direction of the oil droplets guided by the guide section 21 gradually becomes parallel to the bottom plate of the guide plate 2, avoiding splashing when flowing from the guide section 21 to the guide plate 2; and by making the surface of the guide section 21 parallel to the rear side, the movement direction of the oil droplets is perpendicular to the rear side of the guide plate 2, thereby better guiding the oil droplets.

[0080] In an embodiment of the present invention, the guide plate 2 is provided with an auxiliary smoke inlet 221 that cooperates with the guide portion 21. More specifically, the left and right sides of the guide portion 21 each include an arc-shaped edge 211 extending downward along the guide portion 21 from the top corresponding side and gradually expanding towards the corresponding side, and a straight edge 212 connected to the end of the arc-shaped edge 211 on the corresponding side, and each straight edge 212 is perpendicular to the bottom edge.

[0081] In an embodiment of the present invention, the top of the guide portion 21 is located directly below or slightly in front of the front edge of the upper smoke inlet 111, so that the guide portion 21 is located below the smoke inlet 111; and the top side length of the guide portion 21 is greater than or equal to the corresponding front side length of the smoke inlet 111, so that the guide portion 21 covers the area below the smoke inlet 111, allowing the guide portion 21 to receive all the oil droplets falling from the smoke inlet 111.

[0082] With the above configuration, the guide plate 2 collects all the oil droplets dripping from the oil mesh 18 on the curved surface of the guide section 21. By setting the curved surface that is inclined to the rear side of the guide plate 2, the oil droplets are guided to the rear side of the guide plate 2. Then, the oil is discharged into the oil cup 19 set below the oil cup 27 through the oil drain port 27 opened at the bottom of the baffle 24 on the rear side of the guide plate 2. This prevents the oil droplets from accumulating on the upper surface of the guide plate 2, thereby avoiding the accumulation of thick impurities on the upper surface of the guide plate 2 due to the accumulation of oil droplets after long-term use of the range hood.

[0083] In an embodiment of the present invention, the top of the flow guide 21 is connected to a downwardly inclined auxiliary smoke guide 22; the auxiliary smoke guide 22 is a rectangular surface with rounded corners; the top straight edge 212 of the auxiliary smoke guide 22 is of equal length to the top of the flow guide 21; the bottom of the auxiliary smoke guide 22 is connected to the bottom plate of the flow guide plate 2; the left and right sides of the flow guide 21 are respectively integrated with the corresponding sides of the auxiliary smoke guide 22 and are connected to the bottom plate of the flow guide plate 2; each auxiliary flow guide 23 is an arc surface 231 that is connected to the arc edge 211 of the corresponding side, and each auxiliary flow guide 23 is flush with the corresponding rounded top corner and side edge of the auxiliary smoke guide 22 on one side; the straight edges 212 on the left and right sides of the flow guide 21 are respectively provided with vertically downward extending vertical surfaces 232 that are connected to the bottom plate of the flow guide plate 2.

[0084] With the above configuration, each auxiliary guide section 23 is flush with the arc-shaped top corner and side edge of the corresponding side of the auxiliary smoke guide section 22, so that the oil droplets can flow smoothly from the guide section 21 to both sides, further preventing the oil droplets from accumulating on the guide plate 2. At the same time, the arc surface set with the two arc-shaped chamfers at the top of the auxiliary smoke guide section 22 provides convenience for the mold manufacturing of the guide plate 2, reducing the manufacturing difficulty of the guide plate 2 mold; at the same time, the curved surface design is more beautiful and improves the user's visual experience.

[0085] In an embodiment of the present invention, the bottom width of the guide section 21 is less than or equal to the length of the straight edge 212 on the rear side of the guide plate 2, and the vertical surfaces 232 on the left and right sides of the guide section 21 are respectively spaced with the baffles on the corresponding sides of the guide plate 2; the bottom plates on the left and right sides of the guide section 21 are respectively connected to the bottom plate located on the rear side of the guide plate 2, so that the oil droplets flowing from the upper surface of the auxiliary guide section 23 to the left and right sides of the upper plate surface of the guide plate 2 flow through the bottom plates on the corresponding sides to the oil outlet 27.

[0086] The baffle plate has an auxiliary smoke guide port 221 that cooperates with the baffle section 21. More specifically, the auxiliary smoke guide port 221 is formed on the auxiliary smoke guide section 22 of the baffle plate; the auxiliary smoke guide port 221 can be any shape, such as a strip or a round hole; the opening area of ​​the auxiliary smoke guide port 221 on the auxiliary smoke guide section 22 does not exceed 30% of the auxiliary smoke guide section 22, so as to avoid affecting the negative pressure value of the negative pressure zone above the baffle plate 2 due to the excessive opening area of ​​the auxiliary smoke guide port 221.

[0087] In this embodiment of the invention, by gradually narrowing the lower surface of the guide section 21 from bottom to top, a smoke-gathering area is formed on the lower surface of the guide plate 2, and the top of the guide plate 2 is connected to the top straight edge 212 of the auxiliary smoke guide section 22. An auxiliary smoke guide port 221 is provided on the auxiliary smoke guide section 22, so that the oil fumes rising below the guide section 21 can flow directly to the bottom of the smoke collection chamber through the auxiliary smoke guide port 221, thereby improving the smoke extraction effect; and the lower surface of the guide section 21 gradually narrows from bottom to the auxiliary smoke guide section 22 The gathering design allows the oil fumes rising to the lower surface of the baffle plate 2 to converge towards the auxiliary smoke inlet 221 through the inclined direction of the guide section 21, further improving the smoke gathering effect of the baffle plate 2. At the same time, the downward inclination of the lower surface of the guide section 21 from the front to the rear causes the liquefied oil or water droplets on the lower surface of the guide section 21 to flow along the guide section 21 to the rear of the baffle plate and into the oil cup 19 set on the rear of the baffle plate, preventing oil droplets from falling onto the stove and improving the user experience.

[0088] In an embodiment of the present invention, the guide portion 21 is located below the oil mesh 18, and the front end of the guide portion 21 is located vertically at the front edge of the oil mesh 18 or below the bottom front side wall of the lower housing 11; so that all the oil droplets dripping from the oil mesh 18 fall onto the guide portion 21, and prevent the oil droplets from falling onto the auxiliary guide plate 2, dripping onto the stove through the auxiliary guide port of the auxiliary guide plate 2 or solidifying on the auxiliary guide port and blocking the guide plate 2.

[0089] In one practical application of this embodiment, when a user is cooking, the range hood provided in this embodiment is turned on to extract the fumes generated by cooking methods such as stir-frying or deep-frying. The operation of the main unit creates a negative pressure zone between the smoke collection chamber and the guide plate 2, promoting the flow of fumes towards the range hood. Most of the fumes flow into the smoke collection chamber through the gaps between the baffle plate and the smoke collection chamber. The remaining fumes that flow to the bottom of the baffle plate's protruding structure are guided by the guide section 21 to the auxiliary guide section 22, and then flow into the smoke collection chamber through the auxiliary guide port 221 opened on the auxiliary guide section 22.

[0090] Meanwhile, before the fumes flow into the fume collection chamber, the oil droplets in the fumes need to be filtered by the oil mesh 18 and collected on the oil mesh 18. After being collected, the oil droplets on the oil mesh 18 will drip down onto the guide section 21 of the guide plate 2. The oil droplets flow to the rear side of the guide plate 2 or to the bottom plate along the inclined direction of the guide section 21 or along the oil guiding arc surfaces set on both sides of the guide section 21. The rear side of the bottom plate is inclined downward, so that the oil droplets flowing to the bottom plate gradually flow to the rear side of the guide plate 2 and flow out through the oil outlet 27 on the rear side of the guide plate 2, falling into the oil cup 19 set below the oil outlet 27.

[0091] In an embodiment of the present invention, brackets 251 are symmetrically arranged on both sides of the flow guiding portion 21 on the upper surface of the flow guide plate 2. Each bracket 251 is a Z-shaped bracket 251. The two legs at the bottom of each bracket 251 are welded to the upper surface. A snap-fit ​​base 252 is provided on the top plane of each bracket 251. Each corner of each Z-shaped bracket 251 is provided with a pressing protrusion that protrudes inward to the corner, so as to improve the structural strength of the bracket 251 and prevent the bracket 251 from deforming after long-term use, thereby affecting the balance and fixation of the flow guide plate 2.

[0092] In this embodiment of the invention, the range hood provided in this embodiment has a guide plate 2, and a rotating connection structure 26 is provided on the rear side of the guide plate 2. The rear side of the guide plate 2 is hinged to the bottom of the lower housing 11 through the rotating connection structure 26, so that the guide plate 2 can rotate around an axis. The rotating connection structure 27 can be a hinge or a connector that can rotate around an axis. In order to securely fix the guide plate 2 to the bottom panel of the lower housing 11, a snap-fit ​​structure 25 is symmetrically provided at both ends of the front side of the upper surface of the guide plate 2. Each snap-fit ​​structure 25 includes a bracket 251. The upper part 51 is provided with a buckle base 252, and each buckle base 252 has a buckle groove 253 in the middle of its top. Each buckle groove 253 has a spring-loaded structure on both sides. The bottom of the lower housing 11 is provided with a plug corresponding to each buckle groove 253. Each plug has a groove on its corresponding side. Each plug is inserted into the spring-loaded groove of the corresponding buckle base 252. The grooves on both sides of the plug and the corresponding spring-loaded structure on the side engage to snap the plug into the corresponding buckle base 252, so that each plug can be detachably engaged with the corresponding buckle base 252.

[0093] In an embodiment of the present invention, when the guide plate 2 is fixedly connected below the smoke collection chamber, it is inclined downward from the front to the rear. By being inclined, the oil flowing to the upper surface of the bottom plate of the guide plate 2 can automatically flow into the oil cup 19 by gravity, preventing the oil from stagnating and solidifying on the surface of the bottom plate, which is difficult to clean.

[0094] In an embodiment of the present invention, the oil cup 19 is detachably connected to the bottom rear side of the smoke collection chamber, so as to facilitate the user to disassemble, empty and install the oil cup 19.

[0095] With the above setup, when installing the guide plate 2, first hinge the rear side of the guide plate 2 to the bottom of the smoke collection chamber via the rotating connection structure 26. Then rotate the guide plate 2 counterclockwise and insert the corresponding snap-fit ​​structures 25 on the front side of the guide plate 2 into the corresponding snap-fit ​​protrusions on the bottom of the lower housing 11 to achieve fixed installation of the guide plate 2. When it is necessary to disassemble the guide plate 2 for inspection and maintenance of the smoke collection chamber or cleaning of the smoke machine, first separate the snap-fit ​​groove 253 on the front top of the guide plate 2 from the corresponding snap-fit ​​protrusion, and then rotate the guide plate 2 clockwise to expose the oil screen 18 and the smoke inlet 111 above the guide plate 2 for easy maintenance and cleaning.

[0096] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-described technical content to create equivalent embodiments without departing from the scope of the present invention. The implementation schemes in the above embodiments can be further combined or replaced. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A smoke collection chamber for a range hood, wherein the shell (1) of the smoke collection chamber is formed by a snap-fit ​​connection between an upper shell (12) and a lower shell (11); characterized in that, The outer periphery of the shell (1) is detachably fitted with an outer frame (17), which shields the connection between the upper and lower shells; the outer periphery of the upper shell (12) of the shell (1) is provided with a downwardly folded side rib (15); the connection between the side rib (15) of the upper shell (12) and the outer periphery of the upper shell (12) is provided with a fixing groove (151) that is recessed into the interior of the upper shell (12); the outer periphery of the lower shell (11) is provided with an upwardly folded side rib (15); the connection between the side rib (15) of the lower shell (11) and the outer periphery of the lower shell (11) is provided with a fixing groove (151) that is recessed into the interior of the lower shell (11); the upper shell (12) and the lower shell (11) of the shell (1) are connected by a connecting structure (16); the upper and lower sides of the outer frame (17) are fixed The fixed ribs (172) are respectively engaged with the corresponding fixing grooves (151) on the upper and lower sides of the shell (1); the inner surface (175) of the outer frame (17) is in contact with the outer surface of the side ribs (15) of the upper shell (12) and the lower shell (11); the connecting structure (16) includes a lower connecting rib (161) and an upper connecting rib (162); the lower connecting rib (161) is provided on the side rib (15) of the lower shell (11), and the upper connecting rib (162) is provided on the side rib (15) of the upper shell (12), and the lower connecting rib (161) is provided opposite to the upper connecting rib (162) on the corresponding side; the connecting structure (16) has a recessed area on the outer periphery side of the shell (1) that is recessed into the shell (1); the recessed area forms a clearance with the inner surface (175) of the outer frame (17).

2. The smoke collection chamber of a range hood according to claim 1, characterized in that, The side of the outer frame (17) facing the outer periphery of the shell (1) is the inner facade of the outer frame (17); the main structure of the outer frame (17) is composed of a long decorative strip (171), which extends along the outer periphery of the shell (1) and at least covers the front and left and right sides of the shell (1).

3. The smoke collection chamber of a range hood according to claim 2, characterized in that, The decorative strip (171) has fixing ribs (172) on its upper and lower sides respectively, and each fixing rib (172) is connected to the upper shell (12) and / or the lower shell (11).

4. The smoke collection chamber of a range hood according to claim 3, characterized in that, Each fixing rib (172) is a horizontal flange provided on the upper and lower sides of the inner facade of the decorative strip (171), and each fixing rib (172) is arranged in the same direction as the inner surface of the corresponding connected decorative strip (171); each fixing rib (172) is flush with the corresponding side end of the decorative strip (171).

5. The smoke collection chamber of a range hood according to any one of claims 1 to 4, characterized in that, Each fixed groove (151) has a vertical groove wall of the same height and a horizontal groove wall of the same width.

6. The smoke collection chamber of a range hood according to any one of claims 1 to 4, characterized in that, The upper shell (12) and the lower shell (11) are respectively provided with continuous fixing grooves (151) extending along the connection between the side ribs (15) and the corresponding shells (1); the upper side of the inner facade (175) of the outer frame (17) and The lower side is provided with continuous fixing ribs (172) extending along the corresponding side edges; the outer frame (17) is slidably connected to the corresponding fixing grooves (151) through each fixing rib (172).

7. The smoke collection chamber of a range hood according to any one of claims 1 to 4, characterized in that, The bottom of the shell (1) is provided with a guide plate (2) with the plate surface protruding upward; the guide plate (2) has an auxiliary smoke guide port (221) on the inclined surface formed by the protrusion.

8. The smoke collection chamber of a range hood according to any one of claims 1 to 4, characterized in that, The lower connecting rib (161) includes a reinforcing portion (163) that bends and extends into the inner side of the lower shell (11); the upper connecting rib (162) includes a reinforcing portion (163) that bends and extends into the inner side of the upper shell (12); and the length of the reinforcing portion (163) of each upper connecting rib (162) is at least greater than the thickness of the lower connecting rib (161) relative to the length of the reinforcing portion (163) of the corresponding lower connecting rib (161).

9. A range hood, characterized in that, The range hood uses the smoke collection chamber of a range hood as described in any one of claims 1 to 8.

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