A range hood

Abstract

The application discloses a range hood, comprising a smoke collecting cavity with a smoke suction inlet on one side; an extension module is detachably arranged on the periphery of the smoke collecting cavity, the extension module has an extension smoke collecting cavity which is in communication with the smoke collecting cavity, and the extension smoke collecting cavity has a smoke inlet which is arranged on the same side as the smoke suction inlet. The application has the beneficial effects that: the extension smoke collecting cavity is arranged on the periphery of the smoke collecting cavity, the smoke around the smoke collecting cavity is sucked, the smoke suction range of the range hood is enlarged, and the phenomenon of smoke escaping is prevented; meanwhile, the smoke collecting cavity and the extension module are detachably connected, the user can selectively detach the extension module, the space occupied by the range hood in the kitchen is reduced, and the user is prevented from colliding with the range hood.

Description

Technical Field

[0001] This invention belongs to the field of kitchen appliances, and more specifically, relates to a range hood. Background Technology

[0002] A range hood mainly consists of a casing, duct, fan, and volute. The fan inside the volute creates negative pressure, drawing in cooking fumes and separating them to purify the air. The primary function of a range hood is to extract cooking fumes; it has excellent fume collection capabilities, ensuring that as much fume as possible enters the machine, providing the user with a good experience.

[0003] Most standard range hoods are suitable for two-burner cooktops. For multi-burner cooktops (three or more burners), when multiple burners are used simultaneously, the spread of cooking fumes increases, requiring a range hood with a sufficiently large smoke-collecting area to capture all the fumes. When users replace their two-burner cooktops with three-burner or more, standard-width range hoods often fail to capture enough fumes, leading to escaping fumes that pollute the kitchen air and harm health, necessitating a replacement range hood, which is not economical for users. Furthermore, due to limited kitchen space, large range hoods take up too much space, increasing the risk of bumping one's head when not using the hood, such as during food preparation or dishwashing. In daily life, users rarely use all three burners simultaneously for three meals a day, so large range hoods not only occupy too much space but also fail to make the most of available space, resulting in wasted space.

[0004] Chinese Patent CN 210801320U (A Side-Suction Range Hood, 2020.06.19) discloses a side-suction range hood, which improves the smoke collection effect of the smoke collection chamber by opening multiple smoke inlets on the front panel and both sides of the smoke collection chamber. However, by only opening smoke inlets, it cannot effectively collect the smoke from the front or left and right sides, and cannot effectively solve the technical problem that this invention aims to solve.

[0005] In view of this, the present invention is proposed. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide an expansion module for the smoke collection chamber of a range hood. By setting expansion modules on both sides of the smoke collection chamber and communicating with the inside of the chamber, the problem that small-sized smoke collection chambers cannot completely collect smoke from stoves with three or more burners is solved. At the same time, the problem that the range hood must be replaced when replacing a two-burner stove with a three-burner or higher stove is also solved. Furthermore, by detachably connecting the smoke collection chamber and the expansion module, the problem of large-sized range hoods occupying too much space is solved.

[0007] To solve the aforementioned technical problems, the basic concept of the technical solution adopted by this invention is as follows: A range hood includes a smoke collection chamber with a smoke inlet on one side; an expansion module is detachably disposed on the outer periphery of the smoke collection chamber, and the expansion module has an extended smoke collection chamber communicating with the interior of the smoke collection chamber, the extended smoke collection chamber having a smoke inlet opening on the same side as the smoke inlet. By setting an extended smoke collection chamber on the outer periphery of the smoke collection chamber, the smoke from the periphery of the smoke collection chamber is sucked in, thereby increasing the smoke extraction range of the range hood and preventing smoke escape; at the same time, the detachable connection between the smoke collection chamber and the expansion module allows the user to selectively remove the expansion module, thereby reducing the space occupied by the range hood in the kitchen and reducing the possibility of the user bumping into the range hood.

[0008] Furthermore, a connection hole is opened on the side wall of the smoke collection chamber, and a corresponding hook is set on the side wall of the expansion module; or, a connection hole is opened on the side wall of the expansion module, and a corresponding hook is set on the side wall of the smoke collection chamber, so that the expansion module can be detachably installed on the smoke collection chamber by using the hooks hung in the connection hole.

[0009] Preferably, the hook is a hook-shaped structure that extends horizontally outward from the connecting wall of the expansion module or the side wall corresponding to the smoke collection chamber, and bends vertically downward or upward; the opening height and width of the connecting hole are at least equal to the vertical height and width of the corresponding hook.

[0010] Furthermore, a magnet is provided on the side wall of the smoke collection chamber or the expansion module, and a magnet groove is provided on the corresponding side wall of the expansion module or the smoke collection chamber (5). The magnetic attraction between the magnet and the magnet groove is used to detachably install the expansion module on the smoke collection chamber.

[0011] Preferably, the magnet groove is arranged opposite to the magnet, and the magnet groove is a pressed shape that is recessed inward on the side wall of the smoke collection chamber or the connecting wall of the expansion module, and the depth of the magnet groove is not less than the thickness of the magnet protruding outward.

[0012] Furthermore, the main body of the expansion module is a shell, and a cavity is set inside the shell, which constitutes an expanded smoke collection chamber; one side of the shell is set as a connecting wall, and a connecting port is opened on the connecting wall to connect the expanded smoke collection chamber and the smoke collection chamber; the opposite side is an air inlet side wall with a smoke inlet; the side wall of the smoke collection chamber fits against the connecting wall, and a smoke inlet is opened on the side wall of the smoke collection chamber, which is connected to the connecting port.

[0013] Furthermore, the shell is an inverted frustum structure, with one side wall of the frustum shell being a connecting wall with a vertically extending surface; the side wall opposite to the connecting wall is an air inlet side wall with an inclined surface that gradually slopes away from the smoke collection chamber from bottom to top, and the air inlet side wall is provided with an air inlet grille, the grid through holes of the air inlet grille forming a smoke inlet.

[0014] Furthermore, the left and right ends of the connecting wall are connected to the air inlet side wall via the support wall, and at least one support wall has an installation port covered with a sealing cover, which is installed on the connecting wall in an openable and closable manner.

[0015] Furthermore, vertically extending sealing cover slides are provided on the support walls on both sides of the installation port; the left and right ends of the sealing cover are respectively inserted into the corresponding sealing cover slides, and an outwardly protruding stop is provided at the bottom of the installation port. The stop corresponds to the sealing cover slides below the sealing cover slides or directly stops the sealing cover, so that the sealing cover can slide from the top of the installation port to the bottom of the installation port to close the installation port.

[0016] Furthermore, an oil mesh is installed inside the cavity of the shell, which separates the connection port and the smoke inlet on both sides;

[0017] Preferably, the oil mesh is arranged parallel to the connecting wall, and the oil mesh is detachably installed inside the housing through the installation port;

[0018] In a further preferred embodiment, the bottom and top walls of the extended smoke collection chamber are respectively provided with slides, which extend vertically from the side where the installation port is located to the opposite side; the two slides are located on the same vertical plane, and the upper and lower ends of the oil screen can be slidably inserted into the slides on the corresponding sides.

[0019] Furthermore, the bottom wall of the extended smoke collection chamber is provided with an upwardly protruding oil baffle plate, located between the oil mesh and the connecting wall, and close to the installation port; the oil baffle plate is set inside the sealing cover, and the left and right ends of the oil baffle plate are connected to the connecting wall and the oil mesh respectively, and the height of the upper edge of the oil baffle plate is not lower than the height of the oil hole at the bottom of the oil mesh.

[0020] Furthermore, a fan is installed in the extended smoke collection chamber inside the extended module; the fan is located near the connection between the extended module and the smoke collection chamber, and the air outlet side is positioned directly opposite the connection between the extended module and the smoke collection chamber.

[0021] After adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art: By connecting the smoke inlet and the corresponding connection port, the negative pressure zone generated by the smoke collection chamber is used to collect the smoke below the expansion module through the smoke inlet of the connected expansion module, avoiding the escape of oil fumes due to the smoke collection chamber not being able to cover all the stove heads, reducing the pollution of oil fumes to the air and protecting the health of users; Furthermore, the detachable connection between the smoke collection chamber and the expansion module allows users to remove the expansion module according to their own needs, reducing the space occupied by the range hood in the kitchen and reducing the occurrence of collisions between users and the side wall of the smoke collection chamber; Finally, the connection structure between the smoke collection chamber and the expansion module is relatively simple, making it convenient to modify old range hoods, and the modification is small and will not affect the structural strength of the range hood.

[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 external structure of the extended module according to an embodiment of the present invention;

[0026] Figure 2 This is a schematic diagram of the external structure of the extended module in another embodiment of the present invention;

[0027] Figure 3 This is a cross-sectional schematic diagram of the extended module according to an embodiment of the present invention;

[0028] Figure 4 This is a schematic diagram of the appearance of an extension module with another connection structure according to an embodiment of the present invention;

[0029] Figure 5 This is a schematic diagram of the appearance of a preferred extension module according to an embodiment of the present invention;

[0030] Figure 6 This is a schematic diagram of the flue gas flow direction with expansion modules installed on the left and right sides of the smoke collection chamber according to an embodiment of the present invention;

[0031] Figure 7 This is a schematic diagram of the flue gas flow direction with an expansion module installed on the front side of the smoke collection chamber according to an embodiment of the present invention;

[0032] Figure 8 This is a cross-sectional schematic diagram of the connection structure according to an embodiment of the present invention;

[0033] Figure 9 This is a cross-sectional schematic diagram of the connection structure according to another embodiment of the present invention;

[0034] Figure 10 This is a side view of the smoke collection chamber according to an embodiment of the present invention.

[0035] In the diagram: 1. Shell; 2. Connecting structure; 3. Oil screen; 4. Expansion module; 5. Smoke collection chamber; 101. Connecting wall; 102. Connecting port; 103. Air inlet grille; 104. Smoke inlet; 105. Sealing cover; 106. Oil baffle; 107. Mounting port; 108. Air inlet side wall; 109. Support arm; 110. Top wall; 111. Bottom wall; 112. Sealing cover slide; 113. Stop; 114. Slide; 201. Hook; 202. Connecting hole; 203. Magnet; 204. Magnet slot; 401. Expanded smoke collection chamber; 501. Smoke inlet.

[0036] 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

[0037] 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.

[0038] 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.

[0039] 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.

[0040] like Figure 1-9As shown in the embodiment of the present invention, a range hood is introduced, which includes at least a smoke collection chamber 5. The negative pressure zone generated in the chamber draws out the fumes generated by the stove below the smoke collection chamber 5, thereby improving the working efficiency of the fan in the range hood. Smoke inlets 501 are provided on the side walls of the left and right sides and / or the front side of the smoke collection chamber 5. An expansion module 4 is detachably provided on the outer periphery of the smoke collection chamber 5. The expansion module 4 has an expansion smoke collection chamber 401 that communicates with the interior of the smoke collection chamber 5. The expansion smoke collection chamber 401 has a smoke inlet 104 that faces the same side as the smoke inlet 501.

[0041] like Figure 1-3 As shown, in this embodiment of the invention, the main body of the expansion module 4 is a housing 1, and the housing 1 has an internal cavity that forms an expansion smoke collection chamber 401. One side of the housing 1 is a connecting wall 101, and the connecting wall 101 has a connecting port 102 that connects the expansion smoke collection chamber 401 and the smoke collection chamber 5. The opposite side is an air inlet side wall 108 with a smoke inlet 104. This opposite arrangement ensures that the internal cavity of the expansion module 4 can smoothly guide airflow. The side wall of the smoke collection chamber 5 is fitted to the connecting wall 101, and a smoke inlet 501 is provided on the side wall of the smoke collection chamber 5, which is connected to the connecting port 102. The connecting wall 101 has corresponding connecting structures 2 on the outer side of the housing 1 and the corresponding side wall of the smoke collection chamber 5, allowing the expansion module 4 and the smoke collection chamber 5 to be detachably connected.

[0042] With the above configuration, by setting expansion modules 4 on both sides of the smoke collection chamber 5 and communicating with the interior of the chamber, specifically, by connecting the smoke inlet 501 and the corresponding connection port 102, the negative pressure zone generated by the smoke collection chamber 5 can collect the smoke below the expansion module 4 through the smoke inlet 104 of the connected expansion module 4. This prevents the smoke from escaping because the smoke collection chamber 5 cannot cover all the stove heads, reducing the pollution of the air by the smoke and protecting the health of users. Furthermore, because the smoke collection chamber 5 and the expansion module 4 are detachably connected, users can selectively remove the expansion module 4 when the range hood is not in use, thereby increasing the space near the range hood, reducing the space occupied by the range hood in the kitchen, and also reducing the occurrence of collisions between users and the side wall of the smoke collection chamber 5.

[0043] In embodiments of the present invention, when the smoke collection chamber 5 is not connected to the expansion module 4, the corresponding smoke inlet 501 is sealed by a cover baffle to avoid reducing the suction force of the smoke collection chamber 5 on the smoke below, causing the smoke to escape and affecting the user's cooking experience.

[0044] In another embodiment of the present invention, when the range hood smoke collection chamber 5 is not connected to the expansion module 4, the corresponding smoke inlet 501 is set open to ensure the suction power of the range hood for the smoke below the smoke collection chamber 5. When the smoke generated outside the outer periphery of the smoke collection chamber 5 rises to the vicinity of the side wall of the smoke collection chamber 5, the smoke collection chamber 5 can suck it in through the open smoke inlet 501, further improving the smoke collection capacity of the smoke collection chamber 5, reducing the density of smoke in the kitchen, and improving the user's cooking experience.

[0045] like Figure 1-5 As shown, the housing 1 has an inverted frustum structure, and one side wall of the frustum housing 1 is a connecting wall 101 with a vertical extension surface; the side wall opposite to the connecting wall 101 is an air inlet side wall 108 with an inclined surface that gradually slopes away from the smoke collection chamber 5 from bottom to top. The air inlet side wall 108 is provided with an air inlet grille 103, and the grid through holes of the air inlet grille 103 form a smoke inlet (104). The inclined setting of the air inlet side wall 108 is conducive to increasing the contact area with the smoke, and the air inlet angle is also improved accordingly, thereby improving the smoke collection effect of the filling module.

[0046] In the embodiments of the present invention, the bottom of each expansion module 4 is flush with the bottom of the corresponding side of the smoke collection chamber 5 to improve the consistency of the range hood and enhance the user's visual experience. At the same time, it can reduce the vertical height of the smoke inlet 104 of the expansion module 4, further improving the smoke collection effect.

[0047] Preferably, the connecting wall 101 of the expansion module 4 is configured to be the same shape as the corresponding side wall of the smoke collection chamber 5, so that the connecting wall 101 and the corresponding side wall of the smoke collection chamber 5 can overlap and connect, thereby improving the overall integrity of the range hood.

[0048] In embodiments of the present invention, the expansion module 4 is formed by welding or other common processes from multiple plates, or the expansion module 4 is integrally formed.

[0049] like Figure 1 , 4 As shown in Figures 8 and 9, an expansion module 4 is detachably provided on the outer periphery of the smoke collection chamber 5 via a connecting structure 2. The connecting structure includes a connecting hole 202 opened on the side wall of the smoke collection chamber 5, and a hook 201 correspondingly provided on the side wall of the expansion module 4; or, a connecting hole 202 opened on the side wall of the expansion module 4, and a hook 201 correspondingly provided on the side wall of the smoke collection chamber 5, and the expansion module 4 is detachably installed on the smoke collection chamber 5 by using the hook 201 hung in the connecting hole 202.

[0050] Preferably, the hook 201 is a hook-shaped structure that extends horizontally outward from the connecting wall 101 of the expansion module 4 or the side wall corresponding to the smoke collection chamber 5, and bends vertically downward or upward; the opening height and width of the connecting hole 202 are at least equal to the vertical height and width of the corresponding hook 201.

[0051] When the user needs to install the expansion module 4 in the smoke collection chamber 5, the bent parts of the hooks 201 on the side wall of the smoke collection chamber 5 or the connecting wall 101 of the expansion module 4 should be inserted into the interior of the expansion module 4 or the smoke collection chamber 5 through the corresponding connecting holes 202. Then, the expansion module 4 should be lowered a certain distance so that the bent parts hook onto the corresponding side wall, thus fixing the expansion module 4 in place. When disassembly is required, the expansion module 4 should be lifted up until the bent parts of the hooks 201 are completely away from the corresponding hooked side wall. Then, the expansion module 4 should be moved outward to disassemble it.

[0052] Through the above settings, while ensuring a stable connection of the expansion module 4, the expansion module 4 can be fixed with simple operations, facilitating the user's disassembly and installation of the expansion module 4. At the same time, the connection structure 2 is relatively simple. When the user needs to modify the old range hood to be used with the expansion module 4 after replacing the gas stove, it is only necessary to open the smoke inlet 501 and the corresponding connection hole 202 on the corresponding side wall of the smoke collection chamber 5. Under the premise of convenient modification and without significantly reducing the structural strength of the smoke collection chamber 5, the old range hood can be upgraded, reducing the user's concerns when purchasing multi-burner stoves and improving the user's consumer experience.

[0053] like Figure 1 , 4 As shown in Figures 8 and 9, the connecting structure 2 also includes a magnet 203 provided on the side wall of the smoke collection chamber 5 or the expansion module 4, and a magnet groove 204 provided on the corresponding side wall of the expansion module 4 or the smoke collection chamber 5. The expansion module 4 is detachably installed on the smoke collection chamber 5 by the magnetic attraction between the magnet 203 and the magnet groove 204.

[0054] Preferably, the magnetic groove 204 is arranged opposite to the magnet 203. The magnetic groove 204 is a pressed shape that is recessed inward on the side wall of the smoke collection chamber 5 or the connecting wall 101 of the expansion module 4, and the groove depth of the magnetic groove 204 is not less than the thickness of the outward protrusion of the magnet 203. The magnet 203 can be at least one magnet 203 randomly arranged on the overlapping surface of the connecting wall 101 and the side wall of the smoke collection chamber 5, or it can be symmetrically arranged, or it can be arranged along the vertical line, or it can be arranged in an array. The arrangement of the magnet 203 further realizes the stability of the connection of the expansion module 4, and since the smoke collection chamber 5 is mostly made of metal, the magnetic design is also suitable for most range hoods.

[0055] With the above settings, the smoke collection chamber 5 and the corresponding expansion module 4 are further fixed by the magnet 203; and the corresponding setting of the magnet slot 204 and the magnet 203 can make the side wall of the smoke collection chamber 5 fit and connect with the connecting wall 101 of the corresponding expansion module 4, so as to avoid the gap between the two side walls caused by the magnet 203 lifting the connected side walls at a certain angle, which would cause air leakage between the connection port 102 and the smoke inlet 501.

[0056] like Figure 1-5 As shown, in an embodiment of the present invention, the left and right ends of the connecting wall 101 are connected to the air inlet side wall 108 via the support wall 109, and at least one support wall 109 is provided with an installation port 107. The installation port 107 is covered with a sealing cover 105, and the sealing cover 105 is detachably installed on the corresponding support wall 109.

[0057] In an embodiment of the present invention, an oil mesh 3 is provided inside the cavity of the housing 1, which separates the connection port 102 and the smoke inlet 104 on both sides. By providing the oil mesh 3, the oil content of the smoke entering the smoke collection chamber 5 through the expansion module 4 can be significantly reduced, thereby reducing the workload of the oil filter structure set in the range hood body and improving the oil filter efficiency of the range hood. At the same time, the filtration of the oil mesh 3 significantly reduces the oil smoke accumulated at the connection port 102, keeping the connection port 102 clean, avoiding blockage of the connection port 102, reducing the user's cleaning work, and improving the user experience.

[0058] In an embodiment of the present invention, the oil mesh 3 is arranged parallel to the connecting wall 101, and the oil mesh 3 is detachably installed in the housing 1 through the mounting port 107; the bottom wall 111 and the top wall 110 of the extended smoke collection chamber 401 are respectively provided with slides 114, and the slides 114 extend vertically from the side where the mounting port 107 is provided to the opposite side; the two slides 114 are respectively located on the same vertical plane, and the upper and lower ends of the oil mesh 3 are slidably inserted into the corresponding slides 114.

[0059] With the above-mentioned configuration, the installation port 107 allows users to clean the interior of the cavity of the expansion module 4. The installation port 107 also serves as the inlet / outlet for the detachable installation of the oil mesh 3. The slide rail 114 allows the oil mesh 3 to slide smoothly within the cavity, ensuring stable installation while facilitating its installation and removal, and making it convenient for users to clean the oil mesh 3. The sealing cover 105 ensures that the expansion module 4 will not leak air during operation, thus guaranteeing its working efficiency.

[0060] In an embodiment of the present invention, vertically extending sealing cover slides 112 are provided on the support walls 109 on both sides of the mounting port 107; the left and right ends of the sealing cover 105 are respectively inserted into the corresponding sealing cover slides 112; the bottom of the mounting port 107 is provided with an outwardly protruding stop portion 113, which corresponds to closing the lower side of the sealing cover slide 112 or directly stopping the sealing cover 105, so that the sealing cover 105 can slide from the upper side of the mounting port 107 to the bottom of the mounting port 107 to close the mounting port 107.

[0061] like Figure 5 As shown, in an embodiment of the present invention, the bottom wall of the extended smoke collection chamber 401 is provided with an upwardly protruding oil baffle 106, located between the oil mesh 3 and the connecting wall 101, and on the side near the mounting port 107; the oil baffle 106 is disposed inside the sealing cover 105, and the left and right ends of the oil baffle 106 are respectively connected to the connecting wall 101 and the oil mesh 3, and the height of the upper edge of the oil baffle 106 is not lower than the height of the oil hole at the bottom of the oil mesh 3.

[0062] With the above settings, when the sealing cover 105 is opened, the accumulated grease in the cavity is prevented from flowing out directly, thus avoiding grease contamination of the kitchen; at the same time, the grease is prevented from directly contacting the sealing cover slide 112 of the sealing cover 105, which would make the sealing cover slide 112 difficult to clean.

[0063] like Figure 6 and 7 As shown, with the above settings, the working process of the extended module 4 of the range hood smoke collection chamber 5 provided in the embodiment of the present invention is as follows:

[0064] After installing the expansion module 4 on the left and right sides and / or front of the smoke collection chamber 5, the user turns on the range hood and stove and cooks the food. The fumes generated below the smoke collection chamber 5 are directly sucked away by the smoke collection chamber 5 and filtered out by the inside of the range hood. At the same time, the fumes generated on the left and right sides and / or front of the smoke collection chamber 5 are sucked in by the expansion modules 4 located on the left and right sides and / or front of the smoke collection chamber 5. Specifically, the fumes are sucked into the cavity of the corresponding housing 1 through the smoke inlets 104 opened on the air inlet grilles 103 of each expansion module 4. Then, the fumes reach the connection port 102 through the oil mesh 3 set in the cavity. The oil droplets in the fumes are filtered by the oil mesh 3 and accumulated at the bottom of the cavity. Finally, the fumes filtered by the oil mesh 3 are discharged from the expansion module 4 through the connection port 102, discharged into the smoke collection chamber 5 through the corresponding smoke inlet 501, and filtered again by the inside of the range hood before being discharged.

[0065] The following problems may arise after installing the expansion module 4: After installing the expansion module 4 on the range hood, the expansion module 4 will divert some of the wind pressure generated by the smoke collection chamber 5, which will reduce the range hood's smoke extraction capacity. This is especially true for older range hoods, where the fan power is usually matched to the opening area of ​​the range hood itself. When the smoke collection chamber 5 is modified and the expansion module 4 is installed, although the coverage area of ​​the smoke collection chamber 5 is ensured to be greater than or equal to the smoke generation surface of the stove, the reduced wind pressure will still lead to a decrease in the range hood's smoke extraction capacity, and the problem of smoke escaping will still exist.

[0066] To address the aforementioned issues, in an embodiment of the present invention, a fan (not shown in the accompanying drawings) is provided in the extended smoke collection chamber 401 inside the extended module 4; the fan is located near the connection between the extended smoke collection chamber 401 and the smoke collection chamber 5, and the air outlet side of the fan is positioned directly opposite the connection between the extended module 4 and the smoke collection chamber 5.

[0067] With the above settings, an independent low-pressure zone is formed in the extended smoke collection chamber 401 by the fan, thereby ensuring the smoke collection capacity of the extended smoke collection chamber 401. Furthermore, the extended smoke collection chamber 401 will not cause diversion of the wind pressure formed in the smoke collection chamber 5, and can also ensure the smoke collection effect of the smoke collection chamber 5 on the oil fumes directly below the smoke collection chamber 5.

[0068] Preferably, the fan is an axial flow fan, with its outlet closely attached to the connection port 102 and fixed to the inner side of the connection wall 101 by means of screws, rivets, etc. The bottom of the axial flow fan does not contact the bottom of the housing 1. The axial flow fan is relatively thin and easy to install, which can reduce the space occupied by the housing 1 in the horizontal direction. Furthermore, the fixing method by screws and other means ensures stable fixing while preventing the axial flow fan from contacting the bottom of the housing 1, thus avoiding the accumulation of impurities and oil on the bottom of the housing 1 that could contaminate the fan.

[0069] 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 range hood, comprising a smoke collecting cavity (5) having a smoke suction inlet (501) on one side; characterized in that, The outer periphery of the smoke collecting cavity (5) is detachably provided with an expansion module (4), the expansion module (4) has an expansion smoke collecting cavity (401) which is in communication with the inside of the smoke collecting cavity (5), and the expansion smoke collecting cavity (401) has a smoke inlet (104) which is arranged on the same side as the smoke inlet (501). The main body of the expansion module (4) is a shell (1), the inside of the shell (1) is provided with a cavity which constitutes the expansion smoke collecting cavity (401); one side of the shell (1) is provided with a connecting wall (101), the connecting wall (101) is provided with a connecting hole (102) which connects the expansion smoke collecting cavity (401) and the smoke collecting cavity (5); and the opposite side is provided with an air inlet side wall (108) which is provided with the smoke inlet (104). The side wall of the smoke collecting cavity (5) is attached to the connecting wall (101), and the smoke inlet (501) is arranged on the side wall of the smoke collecting cavity (5) and is in communication with the connecting hole (102).

2. The range hood according to claim 1, characterized in that A connecting hole (202) is arranged on the side wall of the smoke collecting cavity (5), and a hook (201) is arranged on the side wall of the expansion module (4) correspondingly. Alternatively, a connecting hole (202) is arranged on the side wall of the expansion module (4), and a hook (201) is arranged on the side wall of the smoke collecting cavity (5) correspondingly, and the expansion module (4) is detachably mounted on the smoke collecting cavity (5) by means of the hook (201) hung in the connecting hole (202).

3. A range hood according to claim 2, characterized in that The hook (201) is a hook-shaped structure which extends horizontally outward from the connecting wall (101) or the corresponding side wall of the smoke collecting cavity (5) and is bent vertically downward or upward; the opening height and width of the connecting hole (202) are at least equal to the vertical height and width of the corresponding hook (201).

4. The range hood according to claim 1, wherein A magnet (203) is arranged on the side wall of the smoke collecting cavity (5) or the expansion module (4), and a magnet groove (204) is arranged on the corresponding side wall of the expansion module (4) or the smoke collecting cavity (5) correspondingly, and the expansion module (4) is detachably mounted on the smoke collecting cavity (5) by means of the magnetic attraction between the magnet (203) and the magnet groove (204).

5. A range hood according to claim 4, characterized in that The magnet groove (204) is arranged opposite to the magnet (203), and the magnet groove (204) is recessed inwardly in the connecting wall (101) or the corresponding side wall of the smoke collecting cavity (5), and the groove depth of the magnet groove (204) is not less than the thickness of the magnet (203) protruding outwardly.

6. The range hood according to any one of claims 1 to 5, characterized in that The shell (1) is a reverse truncated pyramid structure, one side wall of the truncated pyramid shell (1) is a vertical extension surface which is the connecting wall (101); the side wall opposite to the connecting wall (101) is an air inlet side wall (108) which is inclined to the direction away from the smoke collecting cavity (5) from bottom to top, and the air inlet side wall (108) is provided with an air inlet grille (103), and the grid through holes of the air inlet grille (103) constitute the smoke inlet (104).

7. A range hood according to claim 6, characterized in that The left and right ends of the connecting wall (101) are connected to the air inlet side wall (108) through support walls (109) respectively, at least one side of the support wall (109) is provided with a mounting hole (107), and the mounting hole (107) is covered with a sealing cover (105), and the sealing cover (105) is detachably mounted on the corresponding support wall (109).

8. A range hood according to claim 7, characterized in that Support walls (109) on the left and right sides of the installation opening (107) are provided with vertically extending sealing cover sliding channels (112); the left and right ends of the sealing cover (105) are respectively inserted into the sealing cover sliding channels (112) on the corresponding side, and the bottom of the installation opening (107) is provided with an outwardly protruding stop portion (113) corresponding to the lower side of the sealing cover sliding channel (112) or directly stopping the sealing cover (105), so that the sealing cover (105) can slide from the upper side of the installation opening (107) to the bottom of the installation opening (107) to close the installation opening (107).

9. The range hood according to claim 7, wherein An oil screen (3) is arranged in the cavity of the shell (1), and the oil screen (3) separates the connecting port (102) and the smoke inlet (104) on both sides.

10. A range hood according to claim 9, wherein The oil screen (3) is arranged in parallel with the connecting wall (101), and the oil screen (3) is detachably installed in the shell (1) through the installation opening (107).

11. A range hood according to claim 10, wherein The bottom wall (111) and the top wall (110) of the expanded smoke collecting cavity (401) are respectively provided with sliding channels (114), and the sliding channels (114) vertically extend from one side provided with the installation opening (107) to the opposite side; the two sliding channels (114) are respectively located on the same vertical plane, and the upper and lower ends of the oil screen (3) are respectively slidably inserted into the sliding channels (114) on the corresponding side.

12. The range hood according to claim 9, wherein The bottom wall of the expanded smoke collecting cavity (401) is provided with an upwardly protruding oil baffle (106) extending from one side of the oil screen (3) to the connecting wall (101) and close to the installation opening (107); the oil baffle (106) is arranged on the inner side of the sealing cover (105), the left and right ends of the oil baffle (106) are respectively connected with the connecting wall (101) and the oil screen (3), and the height of the oil baffle (106) is not lower than the height of the oil hole at the bottom of the oil screen (3).

13. A range hood according to any one of claims 1-5, characterized in that A fan is arranged in the expanded smoke collecting cavity (401) in the expansion module (4); the fan is close to the communication between the expanded smoke collecting cavity (401) and the smoke collecting cavity (5), and the air outlet side of the fan is arranged opposite to the communication between the expansion module (4) and the smoke collecting cavity (5).

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