Range hood

Abstract

The utility model discloses a range hood which comprises a shell and a fan assembly, the shell is provided with a smoke collecting cavity, the front wall of the shell is provided with a front smoke inlet communicated with the smoke collecting cavity, and the top wall of the shell is provided with a smoke outlet communicated with the smoke collecting cavity. The draught fan assembly comprises a draught fan installed in the smoke collecting cavity, an air inlet of the draught fan is opposite to the front smoke inlet, an air outlet of the draught fan is arranged upwards and communicated with the smoke outlet, an air guide piece is installed at the air inlet, and the cross section of the outer wall of the air guide piece is gradually increased from front to back. The bottom wall of the machine shell is further provided with a bottom smoke inlet communicated with the smoke collecting cavity. Therefore, the oil fume can enter the fume collecting cavity from more directions, and the air guide piece can guide the oil fume to enter the fan, so that the fume suction efficiency of the range hood can be greatly improved. And compared with two smoke inlets formed in the front wall of the machine shell, the front smoke inlet and the bottom smoke inlet are arranged, so that the size of the machine shell can be reduced.

Description

Technical Field

[0001] This utility model relates to the field of range hood technology, and in particular to a range hood for absorbing cooking oil. Background Technology

[0002] A range hood typically consists of a casing with a smoke collection chamber. The front surface of the casing has a smoke inlet that communicates with the smoke collection chamber. To improve the smoke extraction efficiency of the range hood, the number of smoke inlets is usually increased, resulting in two smoke inlets along the vertical direction on the front surface of the casing. While this method improves smoke extraction efficiency, it typically results in a larger overall size for the range hood. Utility Model Content

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a range hood with high smoke extraction efficiency and a reduced overall size.

[0004] The range hood according to an embodiment of the present utility model includes: a housing having a smoke collection chamber, the front wall of the housing having a forward smoke inlet communicating with the smoke collection chamber, and the top wall of the housing having a smoke exhaust outlet communicating with the smoke collection chamber; a fan assembly including a fan installed in the smoke collection chamber, the fan's air inlet being arranged opposite to the forward smoke inlet, the fan's air outlet being arranged upward and communicating with the smoke exhaust outlet, and an air guide being installed at the air inlet, the cross-section of the outer wall of the air guide gradually increasing from front to back; wherein, the bottom wall of the housing also has a bottom smoke inlet communicating with the smoke collection chamber.

[0005] The range hood according to the embodiments of this utility model has at least the following beneficial effects:

[0006] In the range hood of this utility model embodiment, by opening a front smoke inlet on the front side wall of the casing and adding a bottom smoke inlet on the bottom wall of the casing, the fumes can not only enter the smoke collection chamber from the front smoke inlet but also flow directly upwards and enter the smoke collection chamber from the bottom smoke inlet. This allows the fumes to enter the smoke collection chamber from more directions, thereby greatly improving the smoke extraction efficiency of the range hood. Furthermore, compared to the prior art which has two smoke inlets on the front wall of the casing, the arrangement of the front and bottom smoke inlets not only improves smoke extraction efficiency but also helps to reduce the overall size of the range hood. By arranging the fan's air inlet towards the front smoke inlet, the fumes can be effectively drawn in from the front smoke inlet. In addition, by installing a guide component at the fan's air inlet, with the outer wall cross-section of the guide component gradually increasing from front to back, the fumes can be guided into the fan, optimizing the flow path of the fumes and further improving the smoke extraction effect of the range hood.

[0007] According to some embodiments of the present invention, the fan includes a volute, a rotor, and a motor. The volute has a wind cavity, and the air inlet and the air outlet are both located in the volute and communicate with the wind cavity. The motor is installed in the volute, and the motor shaft is located in the wind cavity and extends forward. The rotor is located in the wind cavity and is sleeved on the rotor. The air guide is located on the front side of the rotor and is installed on the rotor and abuts against the rotor.

[0008] According to some embodiments of this utility model, the rear surface of the air guide is provided with an installation hole, the front inner wall of the installation hole is provided with a threaded hole, the threaded hole is coaxially arranged with the installation hole, a fastening nut is installed in the installation hole, the front end of the rotating shaft passes through the fastening nut and the threaded hole, and is threadedly connected to the inner peripheral wall of the fastening nut and the threaded hole.

[0009] According to some embodiments of the present invention, the outer peripheral wall of the air guide has multiple grooves extending rearward to the rear surface of the air guide, and all the grooves are arranged at intervals along the circumference of the air guide.

[0010] According to some embodiments of the present invention, the rear sidewall of the guide member is provided with an annular groove surrounding the outer periphery of the mounting hole. The annular groove is provided with a plurality of first reinforcing ribs connecting the outer periphery of the mounting hole and the inner sidewall of the annular groove. All the first reinforcing ribs are arranged at intervals along the circumference of the mounting hole. The outer periphery of the annular groove is also provided with at least one second reinforcing rib surrounding the outer periphery of the mounting hole and extending rearward. The second reinforcing rib is connected to all the first reinforcing ribs.

[0011] According to some embodiments of the present invention, the outer peripheral wall of the volute has a front surface and an annular surface. The annular surface is arranged around the outer periphery of the front surface and extends rearward relative to the front surface. The air inlet is opened on the front surface. The front surface is provided with a first rib around the outer periphery of the air inlet. The front surface is also provided with a plurality of second ribs connected to the first rib and extending outward to the annular surface. The end of the second rib away from the first rib extends rearward along the annular surface. Adjacent second ribs are arranged at intervals.

[0012] According to some embodiments of this utility model, the air inlet is equipped with an activated carbon filter assembly, and the smoke outlet is equipped with a protective net.

[0013] According to some embodiments of the present invention, a smoke guide plate capable of opening or closing the forward smoke inlet is movably installed on the front wall of the housing, and a gas spring device is also rotatably installed on the front wall of the housing. The output end of the gas spring device is rotatably connected to the smoke guide plate, and the gas spring device can drive the smoke guide plate to move closer to or away from the forward smoke inlet.

[0014] According to some embodiments of this utility model, the gas spring device includes a support base and a cylinder. The support base is fixedly installed on the front wall of the housing, and the lower end of the cylinder is rotatably installed on the support base. The cylinder has a first mounting channel, in which a first spring and a gas strut are movably installed. The gas strut extends upward to the outside of the cylinder and is rotatably connected to the smoke guide plate. The first spring is sleeved on the outer periphery of the gas strut. The upper end of the first spring abuts against the inner top wall of the first mounting channel, and the lower end of the first spring abuts against the outer peripheral wall of the gas strut. The gas strut can move upward along the first mounting channel and compress the first spring. The support base has a second mounting channel arranged vertically. A second spring and a movable component are installed in the second mounting channel. The lower end of the second spring abuts against the bottom wall of the first mounting channel, and the upper end of the second spring abuts against the movable component. The lower end of the cylinder is provided with a contact portion that can abut against the movable component. The contact portion can push the movable component downward along the second mounting channel and compress the second spring.

[0015] According to some embodiments of the present invention, the front wall of the housing is further provided with a first magnetic attracting member, and the smoke guide plate is provided with a second magnetic attracting member that can cooperate with the first magnetic attracting member to magnetically attract. When the smoke guide plate closes the forward smoke inlet, the first magnetic attracting member and the second magnetic attracting member magnetically attract each other.

[0016] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0017] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0018] Figure 1 This is a schematic diagram of a range hood according to an embodiment of the present utility model;

[0019] Figure 2 This is another schematic diagram of the range hood according to an embodiment of the present utility model;

[0020] Figure 3 This is a cross-sectional schematic diagram of the range hood according to an embodiment of the present utility model;

[0021] Figure 4 This is a schematic diagram of the fan assembly according to an embodiment of the present utility model;

[0022] Figure 5 This is an exploded view of the fan assembly according to an embodiment of the present utility model;

[0023] Figure 6 This is a schematic diagram of the air guide component according to an embodiment of the present utility model;

[0024] Figure 7 This is an exploded view of the air guide component according to an embodiment of the present utility model;

[0025] Figure 8 This is a cross-sectional schematic diagram of the opening of the smoke guide plate of the range hood according to an embodiment of the present utility model;

[0026] Figure 9 This is a cross-sectional schematic diagram of the closed smoke guide plate of the range hood according to an embodiment of the present utility model;

[0027] Figure 10 This is a schematic diagram of the gas spring device according to an embodiment of the present utility model;

[0028] Figure 11 This is a cross-sectional schematic diagram of the gas spring device according to an embodiment of the present invention.

[0029] Figure label:

[0030] 100 housing, 110 smoke collection chamber, 120 front smoke inlet, 130 bottom smoke inlet, 140 smoke guide plate, 141 clearance groove, 150 first magnetic suction component, 160 second magnetic suction component, 170 switch;

[0031] Fan assembly 200, volute 210, air cavity 211, air inlet 212, front surface 213, annular surface 214, first rib 215, second rib 216, impeller 220, air guide 230, mounting hole 231, threaded hole 232, fastening nut 233, groove 234, annular groove 235, first reinforcing rib 236, second reinforcing rib 237, activated carbon filter assembly 240, protective net 250, motor 260;

[0032] Gas spring device 300, cylinder 310, first mounting channel 311, gas strut 312, first spring 313, abutment part 314, support base 320, second mounting channel 321, movable part 322, second spring 323. Detailed Implementation

[0033] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0034] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0035] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0036] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0037] Reference Figures 1 to 11 This utility model provides a range hood, including a housing 100 and a fan assembly 200. The housing 100 has a smoke collection chamber 110, and a front smoke inlet 120 communicating with the smoke collection chamber 110 is provided on the front wall of the housing 100. A smoke exhaust outlet (not shown in the figure) communicating with the smoke collection chamber 110 is provided on the top wall of the housing 100. The fan assembly 200 includes a fan installed in the smoke collection chamber 110. The fan inlet 212 is arranged opposite to the front smoke inlet 120, and the fan outlet (not shown in the figure) is arranged upward and communicates with the smoke exhaust outlet. An air guide 230 is installed at the air inlet 212, and the cross-section of the outer wall of the air guide 230 gradually increases from front to back. The bottom wall of the housing 100 also has a bottom smoke inlet 130 communicating with the smoke collection chamber 110.

[0038] In the range hood of this embodiment, by opening a front smoke inlet 120 on the front side wall of the housing 100 and adding a bottom smoke inlet 130 on the bottom wall of the housing 100, the fumes can not only enter the smoke collection chamber 110 through the front smoke inlet 120, but also flow directly upwards and enter the smoke collection chamber 110 through the bottom smoke inlet 130. This allows the fumes to enter the smoke collection chamber 110 from more directions, thereby greatly improving the smoke extraction efficiency of the range hood. Furthermore, compared to the prior art where two smoke inlets are opened vertically on the front wall of the housing 100, the arrangement of the front smoke inlet 120 and the bottom smoke inlet 130 in this embodiment not only improves the smoke extraction efficiency but also helps to reduce the overall size of the range hood. By arranging the fan inlet 212 towards the front smoke inlet 120, the fumes entering the smoke collection chamber 110 from the front smoke inlet 120 can flow directly towards the fan inlet 212, ensuring that the fumes are effectively drawn in through the front smoke inlet 120. In addition, by setting an air guide 230 at the air inlet 212 of the fan, the cross-section of the outer wall of the air guide 230 gradually increases from front to back, which can guide the flow of oil fumes and guide the oil fumes into the fan, thus optimizing the flow path of oil fumes and further improving the smoke extraction effect of the range hood.

[0039] It is understood that the cross-section of the outer wall of the air guide 230 gradually increases from front to back. Specifically, the outer wall of the air guide 230 can be set as a conical surface, or it can be set as a pyramidal surface or a hemispherical surface. This utility model does not make specific limitations in this regard, as long as the cross-section of the outer wall of the air guide 230 gradually increases from front to back.

[0040] It is understood that in some embodiments, a duct cover (not shown in the figure) is also installed on the top of the housing 100. The duct cover is arranged around the outer periphery of the exhaust port and extends upward, thereby facilitating the guidance of oil fumes to the outside.

[0041] It is understood that in some embodiments, both the front smoke inlet 120 and the bottom smoke inlet 130 are equipped with filters (not shown in the figure), thereby enabling the fumes entering the smoke collection chamber 110 to be filtered.

[0042] Reference Figures 1 to 11 In some embodiments, the bottom wall of the housing 100 is also provided with a light strip (not shown in the figure). The light strip is located on one side of the bottom smoke inlet 130. The light strip can provide illumination for the user from the bottom of the housing 100, making it convenient for the user to operate and improving the user experience.

[0043] Reference Figures 1 to 6In some embodiments, the fan includes a volute 210, an impeller 220, and a motor 260. The volute 210 has an air cavity 211, an air inlet 212 and an air outlet are both located in the volute 210 and communicate with the air cavity 211. The motor 260 is installed in the volute 210, and the shaft of the motor 260 is located in the air cavity 211 and extends forward. The impeller 220 is located in the air cavity 211 and is sleeved on the shaft. The air guide 230 is located on the front side of the impeller 220, and the air guide 230 is installed on the shaft and abuts against the impeller 220.

[0044] In the above structure, the volute 210 provides an air cavity 211 to accommodate the impeller 220 and the motor 260. The arrangement of the air inlet 212 and the air outlet allows for effective gas flow. The shaft of the motor 260 extends into the air cavity 211 and connects to the impeller 220, ensuring the stable rotation of the impeller 220. The air guide 230 is mounted on the shaft and abuts against the impeller 220, thereby making the installation of the impeller 220 more secure, the structure of the fan more compact and stable, and effectively guiding the flow of oil fumes, reducing air resistance, and allowing the oil fumes to smoothly enter the air cavity 211 and be discharged from the exhaust port, greatly improving the smoke extraction efficiency.

[0045] Reference Figures 1 to 7 In some embodiments, the rear surface of the air guide 230 is provided with a mounting hole 231, and the front inner wall of the mounting hole 231 is provided with a threaded hole 232. The threaded hole 232 is coaxially arranged with the mounting hole 231. A fastening nut 233 is installed in the mounting hole 231. The front end of the rotating shaft passes through the fastening nut 233 and the threaded hole 232, and is threadedly connected to the inner peripheral wall of the fastening nut 233 and the threaded hole 232.

[0046] By adopting the above structure, the fan shaft is simultaneously installed in both the fastening nut 233 and the threaded hole 232, thereby achieving a stable connection between the air guide 230 and the fan. This prevents the air guide 230 from loosening or falling off during operation, improving the operational stability and safety of the range hood. Furthermore, installing the fastening nut 233 in the mounting hole 231 of the air guide 230 and threading it to the fan shaft makes the installation of the fastening nut 233 more secure. The fastening nut 233 can press the impeller 220, making the installation of the impeller 220 more secure and stable, and making the structure of the fan assembly more compact and stable.

[0047] It is understood that the mounting hole 231 can be designed in various forms. For example, the mounting hole 231 can be circular, elliptical, or other polygonal to accommodate different types of fastening nuts 233. This utility model does not specifically limit the design of the mounting hole 231. The fastening nut 233 can be made of high-strength materials, such as stainless steel or alloy steel, to increase the strength and durability of the connection. This utility model also does not specifically limit the fastening nut 233.

[0048] Understandably, referring to Figure 7 The outer peripheral wall of the fastening nut 233 is provided with multiple protrusions (not shown in the figure). The multiple protrusions are evenly arranged along the circumference of the fastening nut 200. When the fastening nut 233 is installed in the mounting hole 231 of the guide member 230, all the protrusions abut against the inner wall of the mounting hole 231. This can reduce the risk of relative slippage between the fastening nut 233 and the guide member 230 during use, thereby helping to ensure the normal operation of the fan assembly and improve the operating stability of the range hood.

[0049] Reference Figures 1 to 7 In some embodiments, the outer peripheral wall of the air guide 230 has a plurality of grooves 234 extending rearward to the rear surface of the air guide 230, and all grooves 234 are arranged at intervals along the circumference of the air guide 230.

[0050] In the above structure, the multiple grooves 234 provided on the outer peripheral wall of the air guide 230 can effectively guide airflow. These grooves 234 are arranged at intervals along the circumference of the air guide 230, allowing air to pass through the air guide 230 more evenly, thereby improving airflow efficiency. In addition, the design of the grooves 234 can also increase the roughness of the outer peripheral wall of the air guide 230, facilitating the installation and disassembly of the air guide 230 and preventing users from slipping when installing or disassembling the air guide 230 due to its excessively smooth outer peripheral wall.

[0051] It is understood that all the grooves 234 can be evenly arranged along the circumference of the air guide 230, thereby guiding the fumes more evenly into the air cavity 211 of the fan. Furthermore, the multiple grooves 234 formed on the outer peripheral wall of the air guide 230 can adopt different shapes and sizes, for example, rectangular, trapezoidal, or arc-shaped grooves 234; this invention does not specifically limit this. In addition, the depth and width of these grooves 234 can be adjusted according to actual needs to achieve the best air guiding effect; this invention also does not specifically limit this.

[0052] Reference Figures 1 to 7 In some embodiments, the rear sidewall of the guide member is provided with an annular groove 235 surrounding the outer periphery of the mounting hole 231. The annular groove 235 is provided with a plurality of first reinforcing ribs 236 connecting the outer periphery of the mounting hole 231 and the inner sidewall of the annular groove 235. All the first reinforcing ribs 236 are arranged at intervals along the circumference of the mounting hole 231. The outer periphery of the annular groove 235 is also provided with at least one second reinforcing rib 237 surrounding the outer periphery of the mounting hole 231 and extending rearward. The second reinforcing rib 237 is connected to all the first reinforcing ribs 236.

[0053] By adopting the above structure, the annular groove 235 can save raw materials for the guide component, which helps to reduce the production cost of the guide component. At the same time, it can also reduce the weight of the guide component and reduce the impact of the guide component on the rotation of the impeller 220 after installation. In addition, by setting the first reinforcing rib 236 and the second reinforcing rib 237, the structural strength and stability of the guide component can be effectively enhanced, ensuring that it can withstand greater mechanical stress during operation and avoiding deformation or damage.

[0054] It is understood that the first reinforcing rib 236 and the second reinforcing rib 237 can be integrally formed with the guide component, thereby further improving the overall integrity and strength of the structure. Furthermore, the depth and width of the annular groove 235 can be adjusted according to specific needs to achieve the best reinforcement effect; this utility model does not specifically limit this aspect.

[0055] Reference Figures 1 to 5 In some embodiments, the outer peripheral wall of the volute 210 has a front surface 213 and an annular surface 214. The annular surface 214 is arranged around the outer periphery of the front surface 213 and extends rearward relative to the front surface 213. The air inlet 212 is opened on the front surface 213. The front surface 213 is provided with a first rib 215 that is arranged around the outer periphery of the air inlet 212. The front surface 213 is also provided with a plurality of second ribs 216 that are connected to the first rib 215 and extend outward to the annular surface 214. One end of the second rib 216 away from the first rib 215 extends rearward along the annular surface 214. Adjacent second ribs 216 are arranged at intervals.

[0056] In the above structure, the first rib 215 and the second rib 216 can effectively enhance the structural strength of the volute 210, and at the same time reduce the whistling sound caused by vibration or deformation of the volute 210 during use, ensuring smooth airflow and the stability of the volute 210 structure.

[0057] It is understood that both the first rib 215 and the second rib 216 can be integrally formed with the volute 210 to ensure a tight connection and structural stability. Furthermore, the number and spacing of the second ribs 216 can be adjusted according to actual needs to achieve optimal structural strength and airflow, and this invention does not impose specific limitations in this regard. For example, the second ribs 216 can be evenly spaced to ensure uniform stress on the annular surface 214 and smooth airflow.

[0058] Reference Figures 1 to 9 In some embodiments, the air inlet 212 is equipped with an activated carbon filter assembly 240, and the smoke outlet is equipped with a protective net 250.

[0059] In the above structure, by installing an activated carbon filter assembly 240 at the air inlet 212 of the fan, the oil fumes can smoothly enter the smoke collection chamber 110 through the smoke inlet. The activated carbon filter assembly 240 can filter and clean the oil fumes that are about to enter the fan in the smoke collection chamber 110, effectively adsorbing harmful substances in the oil fumes, improving air quality, and thus improving the cleanliness of the exhaust gas. This enables the internal exhaust of oil fumes, which is beneficial to meeting different user needs and facilitating diverse user choices. By installing a protective net 250 at the exhaust port, it is possible to prevent foreign objects or small animals from entering the smoke collection chamber 110 through the exhaust port and damaging the internal parts of the smoke collection chamber 110, thereby ensuring the normal operation of the range hood and the smooth and safe exhaust of smoke.

[0060] It is understood that the activated carbon filter assembly 240 can take various forms, such as a filter box containing activated carbon granules or a filter screen containing activated carbon fibers; this utility model does not specifically limit its application in this regard. Furthermore, the activated carbon filter assembly 240 can be installed at the air inlet 212 of the fan via a snap-fit ​​structure, or it can be installed at the air inlet 212 of the fan using screws or other fasteners; this utility model does not specifically limit its application in this regard either.

[0061] It is understood that the protective net 250 can be installed at the exhaust port on the top of the housing 100 by means of a snap-fit ​​structure, or the protective net 250 can also be installed at the exhaust port on the top of the housing 100 by screws or other fasteners. This utility model does not make any specific limitation in this regard.

[0062] Reference Figures 1 to 11 In some embodiments, a smoke guide plate 140 capable of opening or closing the forward smoke inlet 120 is movably installed on the front wall of the housing 100. A gas spring device 300 is also rotatably installed on the front wall of the housing 100. The output end of the gas spring device 300 is rotatably connected to the smoke guide plate 140. The gas spring device 300 can drive the smoke guide plate 140 to move closer to or away from the forward smoke inlet 120.

[0063] In the above structure, the opening and closing of the smoke guide plate 140 is controlled by a gas spring device 300, allowing the smoke guide plate 140 to move smoothly and ensuring that the inlet 120 can be flexibly opened or closed as needed. Furthermore, since the gas spring device 300 is directly mounted on the front wall of the housing 100, i.e., outside the smoke collection chamber 110, it facilitates the disassembly, assembly, and cleaning of the gas spring device 300, making it convenient for users to use and operate.

[0064] Reference Figures 1 to 11In some embodiments, the gas spring device 300 includes a support base 320 and a cylinder 310. The support base 320 is fixedly installed on the front wall of the housing 100, and the lower end of the cylinder 310 is rotatably installed on the support base 320. The cylinder 310 has a first mounting channel 311, in which a first spring 313 and a gas strut 312 are movably installed. The gas strut 312 extends upward to the outside of the cylinder 310 and is rotatably connected to the smoke guide plate 140. The first spring 313 is sleeved on the outer periphery of the gas strut 312, with the upper end of the first spring 313 abutting against the inner top wall of the first mounting channel 311 and the lower end of the first spring 313 abutting against the gas strut. The outer peripheral wall of 312 allows the gas strut 312 to move upward along the first mounting channel 311 and compress the first spring 313. The support base 320 has a second mounting channel 321 arranged in the vertical direction. The second mounting channel 321 contains a second spring 323 and a movable member 322. The lower end of the second spring 323 abuts against the bottom wall of the first mounting channel 311, and the upper end of the second spring 323 abuts against the movable member 322. The lower end of the cylinder body 310 is provided with an abutting part 314 that can abut against the movable member 322. The abutting part 314 can push the movable member 322 downward along the second mounting channel 321 and compress the second spring 323.

[0065] By adopting the above structure, the smoke guide plate 140 can open or close more smoothly. The cooperation of the first spring 313 and the gas strut 312 can effectively support the smoke guide plate 140 and prevent it from shaking during opening or closing. The design of the second spring 323 and the moving part 322 can provide additional cushioning and support, further improving the stability and ease of operation of the smoke guide plate 140. Specifically, during the opening of the smoke guide plate 140, the cylinder 310 will rotate forward relative to the support seat 320, and the gas strut 312 can move upward along the first mounting channel 311 and compress the first spring 313. The first spring 313 can provide a buffering force during the opening of the smoke guide plate 140, preventing the smoke guide plate 140 from opening too quickly and causing injury to the user, greatly improving the movement stability of the smoke guide plate 140 when it is opened. During the closing of the smoke guide plate 140, the cylinder 310 rotates backward relative to the support base 320, and the gas strut 312 moves downward along the first mounting channel 311. At this time, the abutment part 314 on the cylinder 310 will rotate backward with the cylinder 310 and abut downward against the movable part 322. Under the pressure of the abutment part 314, the movable part 322 can move downward along the second mounting channel 321 and compress the second spring 323. This allows the second spring 323 to provide additional buffering force during the closing of the smoke guide plate 140, preventing the smoke guide plate 140 from closing quickly and causing a rigid collision with the housing 100. This improves the movement stability and safety of the smoke guide plate 140 during the closing process and protects the smoke guide plate 140 and the housing 100.

[0066] Reference Figures 1 to 11 In some embodiments, the front wall of the housing 100 is also provided with a first magnetic member 150, and the smoke guide plate 140 is provided with a second magnetic member 160 that can cooperate with the first magnetic member 150 to magnetically attract each other. When the smoke guide plate 140 closes the forward smoke outlet 120, the first magnetic member 150 and the second magnetic member 160 magnetically attract each other.

[0067] In the above structure, the magnetic attraction between the first magnetic member 150 and the second magnetic member 160 enables the smoke guide plate 140 to fit tightly against the front wall of the housing 100, thereby effectively solving the sealing problem after the front smoke inlet 120 is closed, preventing smoke leakage, improving the performance of the range hood, and also preventing the smoke guide plate 140 from being opened accidentally.

[0068] The first magnetic chuck 150 and the second magnetic chuck 160 can be made of common magnetic materials, such as magnets, neodymium iron boron magnets, or ferrite magnets. Specifically, the first magnetic chuck 150 can be fixed at an appropriate position on the front wall of the housing 100, while the second magnetic chuck 160 is fixed to the smoke guide plate 140, so that when the smoke guide plate 140 closes the forward smoke inlet 120, the two can be accurately aligned and generate sufficient magnetic attraction. As a preferred embodiment, the first magnetic chuck 150 and the second magnetic chuck 160 can be designed in annular shape to ensure a larger contact area and stronger magnetic attraction. In addition, the first magnetic chuck 150 and the second magnetic chuck 160 can be installed by means of adhesive, screw fixing, etc., to ensure their firmness and durability.

[0069] Reference Figure 1 and Figure 2 The front wall of the housing 100 is also provided with a switch 170 located on the side of the inlet 120. The switch 170 can be used to control the operation of the range hood. The edge of the guide plate 140 is provided with a clearance groove 141 to make way for the switch 170. This can prevent the guide plate 140 from colliding with the switch 170 when it is closed, which would reduce the sensitivity of the switch 170 or cause it to be directly damaged.

[0070] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A range hood, characterized in that, include: The housing (100) has a smoke collection chamber (110), and the front wall of the housing (100) is provided with a forward smoke inlet (120) communicating with the smoke collection chamber (110), and the top wall of the housing (100) is provided with a smoke exhaust port communicating with the smoke collection chamber (110). The fan assembly (200) includes a fan installed in the smoke collection chamber (110), the air inlet (212) of the fan is arranged opposite to the forward smoke outlet (120), the air outlet of the fan is arranged upward and connected to the smoke exhaust outlet, and a guide (230) is installed at the air inlet (212), the cross-section of the outer wall of the guide (230) gradually increases from front to back; The bottom wall of the housing (100) is also provided with a bottom smoke inlet (130) that communicates with the smoke collection chamber (110).

2. The range hood according to claim 1, characterized in that, The fan includes a volute (210), a wind turbine (220), and a motor (260). The volute (210) has a wind cavity (211). The air inlet (212) and the air outlet are both located on the volute (210) and connected to the wind cavity (211). The motor (260) is mounted on the volute (210). The shaft of the motor (260) is located in the air cavity (211) and extends forward. The impeller (220) is located in the air cavity (211) and sleeved on the shaft. The air guide (230) is located on the front side of the impeller (220). The air guide (230) is mounted on the shaft and abuts against the impeller (220).

3. The range hood according to claim 2, characterized in that, The rear surface of the air guide (230) is provided with a mounting hole (231), and the front inner wall of the mounting hole (231) is provided with a threaded hole (232). The threaded hole (232) is coaxially arranged with the mounting hole (231). A fastening nut (233) is installed in the mounting hole (231). The front end of the rotating shaft passes through the fastening nut (233) and the threaded hole (232), and is threadedly connected to the inner circumferential wall of the fastening nut (233) and the threaded hole (232).

4. The range hood according to claim 3, characterized in that, The outer peripheral wall of the air guide (230) has a plurality of grooves (234) extending rearward to the rear surface of the air guide (230), and all the grooves (234) are arranged at intervals along the circumference of the air guide (230).

5. The range hood according to claim 3, characterized in that, The rear sidewall of the air guide is provided with an annular groove (235) surrounding the outer periphery of the mounting hole (231). The annular groove (235) is provided with a plurality of first reinforcing ribs (236) connecting the outer periphery of the mounting hole (231) and the inner sidewall of the annular groove (235). All the first reinforcing ribs (236) are arranged at intervals along the circumference of the mounting hole (231). The outer periphery of the annular groove (235) is also provided with at least one second reinforcing rib (237) surrounding the outer periphery of the mounting hole (231) and extending rearward. The second reinforcing rib (237) is connected to all the first reinforcing ribs (236).

6. The range hood according to claim 2, characterized in that, The outer peripheral wall of the volute (210) has a front surface (213) and an annular surface (214). The annular surface (214) is arranged around the outer periphery of the front surface (213) and extends rearward relative to the front surface (213). The air inlet (212) is opened on the front surface (213). The front surface (213) is provided with a first rib (215) surrounding the outer periphery of the air inlet (212). The front surface (213) is also provided with a plurality of second ribs (216) connected to the first rib (215) and extending outward to the annular surface (214). The end of the second rib (216) away from the first rib (215) extends backward along the annular surface (214), and adjacent second ribs (216) are arranged at intervals.

7. The range hood according to claim 1, characterized in that, The air inlet (212) is equipped with an activated carbon filter assembly (240), and the smoke outlet is equipped with a protective net (250).

8. The range hood according to claim 1, characterized in that, The front wall of the housing (100) is movably mounted with a smoke guide plate (140) capable of opening or closing the forward smoke inlet (120). The front wall of the housing (100) is also rotatably mounted with a gas spring device (300). The output end of the gas spring device (300) is rotatably connected to the smoke guide plate (140). The gas spring device (300) can drive the smoke guide plate (140) to move closer to or away from the forward smoke inlet (120).

9. The range hood according to claim 8, characterized in that, The gas spring device (300) includes a support base (320) and a cylinder (310). The support base (320) is fixedly installed on the front wall of the housing (100), and the lower end of the cylinder (310) is rotatably installed on the support base (320). The cylinder body (310) has a first installation channel (311). A first spring (313) and a gas strut (312) are movably installed in the first installation channel (311). The gas strut (312) extends upward to the outside of the cylinder body (310) and is rotatably connected to the smoke guide plate (140). The first spring (313) is sleeved on the outer periphery of the gas strut (312). The upper end of the first spring (313) abuts against the inner top wall of the first installation channel (311), and the lower end of the first spring (313) abuts against the outer peripheral wall of the gas strut (312). The gas strut (312) can move upward along the first installation channel (311) and compress the first spring (313). The support base (320) has a second mounting channel (321) arranged in the vertical direction. A second spring (323) and a movable part (322) are installed in the second mounting channel (321). The lower end of the second spring (323) abuts against the bottom wall of the first mounting channel (311), and the upper end of the second spring (323) abuts against the movable part (322). The lower end of the cylinder (310) is provided with an abutting part (314) that can abut against the movable part (322). The abutting part (314) can push the movable part (322) to move downward along the second mounting channel (321) and compress the second spring (323).

10. The range hood according to claim 8, characterized in that, The front wall of the housing (100) is also provided with a first magnetic suction member (150), and the smoke guide plate (140) is provided with a second magnetic suction member (160) that can cooperate with the first magnetic suction member (150) to magnetically attract each other. When the smoke guide plate (140) closes the forward smoke inlet (120), the first magnetic suction member (150) and the second magnetic suction member (160) magnetically attract each other.

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