Range hood
By designing a diversion structure in the range hood and using the rotating part and the extension part to adjust the channel size, the problem of wind and energy waste when using a single stove is solved, and efficient wind and energy utilization is achieved.
Patent Information
- Application Number
- CN202421564504.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-03
- Publication Date
- 2025-04-25
- Estimated Expiration
- 2034-07-03
AI Technical Summary
When the existing range hood is used with a single stove, there is a serious waste of wind power and energy, and the wind power distribution cannot be effectively adjusted.
A range hood is designed, which includes a shell and a diversion structure. The diversion structure divides the oil fume suction channel into a left channel and a right channel. The channel size is adjusted by a rotatable rotating part and an extension part, and the driving structure drives the extension part to slide to change the channel area.
When used with a single stove, the oil smoke suction rate is improved, the wind and energy waste is reduced, and the efficient use of wind and energy is achieved.
Smart Images
Figure CN222799102U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of range hoods, in particular to a range hood. Background Art
[0002] A range hood is a kitchen appliance used to purify the kitchen environment. Usually, the range hood is installed above the cooking equipment. It can quickly extract the fumes generated during the cooking process, purify the fumes and discharge them. As an important kitchen appliance, the range hood has entered more and more households.
[0003] In order to adapt to the layout of the kitchen with two stoves on the left and right, existing range hoods are often equipped with two air inlets on the left and right to match the stoves, with one air inlet for each stove to enhance the smoke extraction effect. However, in some cooking scenarios, users only use one stove for cooking. At this time, the wind power provided by the fan is still distributed to the two air inlets, resulting in a waste of wind power and energy. Utility Model Content
[0004] The main purpose of the utility model is to provide a range hood, aiming to reduce the waste of wind power and energy.
[0005] In order to achieve the above-mentioned object, the range hood proposed by the utility model comprises:
[0006] A housing having an oil fume suction passage therein; and
[0007] The diversion structure is used to divide the oil fume suction channel into a left channel and a right channel, and adjust the size of the left channel and the right channel. The diversion structure includes a rotating part rotatably installed in the oil fume suction channel, and an extension part provided on the rotating part. The extension part can change the length of the diversion structure to change the ability of the diversion structure to adjust the size of the left channel and the right channel.
[0008] In one embodiment, the rotating portion is provided with a limiting sliding groove, and the extension portion is slidably mounted in the limiting sliding groove.
[0009] In one embodiment, the rotating portion is provided with a driving structure, and the driving structure drives the extending portion to slide.
[0010] In one embodiment, the driving structure includes a driving motor and an adjusting rod, the extension portion is mounted on the adjusting rod, and the driving motor drives the adjusting rod to rotate, so as to drive the extension portion to slide relative to the rotating portion.
[0011] In one embodiment, the adjusting rod is configured as a screw rod, the extension portion is provided with a screw rod mounting hole, and an adjusting piece is fixed in the screw rod mounting hole, the screw rod is inserted into the screw rod mounting hole and threadedly cooperates with the adjusting piece.
[0012] In one embodiment, a fixing groove is further provided in the rotating part, the driving motor is fixed to the fixing groove, and a limiting hole is provided between the limiting slide groove and the fixing groove, and the adjusting rod passes through the limiting hole and extends into the limiting slide groove.
[0013] In one embodiment, a limiting ring protrusion is provided on one side of the extension portion close to the drive motor, and a limiting flange is provided on the opening edge of the limiting slide groove, and the limiting flange abuts against the limiting ring protrusion to prevent the extension portion from escaping from the limiting slide groove.
[0014] In one embodiment, one of the groove wall of the limiting sliding groove and the extension portion is arranged in the guide groove, and the other is provided with a guide rib, and the guide rib is slidably installed in the guide groove.
[0015] In one embodiment, the extension length of the extension portion relative to the rotating portion is greater than or equal to 80 mm and less than or equal to 120 mm.
[0016] In one embodiment, the extension portion is configured as a foldable extension structure.
[0017] In one embodiment, the extension portion is flippable relative to the rotation portion.
[0018] In one embodiment, the diversion structure further includes a fixed portion, the fixed portion is mounted on the housing, the rotating portion is rotatably mounted on the fixed portion, and the extension portion is mounted on the rotating portion.
[0019] The technical solution of the utility model is to set an oil suction channel on the shell, and a diversion structure is set in the oil fume suction channel. The diversion structure is used to divide the oil fume suction channel into a left channel and a right channel, so as to adapt to the layout of the left and right double stoves in the kitchen. The diversion structure includes a rotating part rotatably installed in the oil fume suction channel, and an extension part provided on the rotating part. The rotating part can adjust the size of the left channel and the right channel. In the first working state, please refer to Figure 1 If only the left air inlet needs to be opened, the rotating part rotates to the right, thereby increasing the flow area of the left channel and reducing the flow area of the side air duct; if only the right air inlet needs to be opened, the rotating part rotates to the left, thereby increasing the flow area of the right channel and reducing the flow area of the left air duct, thereby increasing the suction rate of oil smoke; in the second working state, please refer to Figure 2 At this time, the diversion structure rotates to a point where the flow areas of the left channel and the right channel are roughly equal, thereby ensuring uniform air intake.
[0020] The extension part can further extend the length of the rotating part, so that during the rotation of the diversion structure, it rotates at a shorter length (approximately equal to the length of the rotating part). When it is in the extreme position, the extension part changes the length of the diversion structure (greater than the length of the rotating part) to improve the diversion structure's ability to adjust the size of the left channel and the right channel, thereby reducing the waste of wind power and energy. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.
[0022] Figure 1 A schematic structural diagram of an embodiment of a range hood provided by the utility model in a first working state;
[0023] Figure 2 for Figure 1 A schematic diagram of the structure of the central range hood in the second working state;
[0024] Figure 3 for Figure 1 A schematic diagram of the structure of the rotating part of the central range hood;
[0025] Figure 4 for Figure 3 Schematic diagram of the cross-sectional structure of the middle rotating part along AA;
[0026] Figure 5 for Figure 1 A schematic diagram of the internal structure of the rotating part of the central range hood;
[0027] Figure 6 for Figure 1 An angled structural diagram of the extended portion of the central range hood;
[0028] Figure 7 for Figure 1 An exploded view of the extension of the central range hood;
[0029] Figure 8 for Figure 1 A schematic structural diagram of the extension of the central range hood from another angle;
[0030] Fig. 9 for Figure 8 Schematic diagram of the cross-sectional structure of the middle extension along BB;
[0031] Fig.10 for Fig. 9 A partial enlarged view of point A in the middle.
[0032] Description of Figure Numbers:
[0033] 100. Range hood; 1. Casing; 11. Range hood channel; 111. Left channel; 112. Right channel; 2. Diversion structure; 21. Rotating part; 211. Limiting slide groove; 212. Guide groove; 213. Fixed groove; 214. Limiting flange; 22. Extension part; 221. Screw mounting hole; 222. Adjusting part; 223. Limiting ring protrusion; 224. Guide rib; 225. First mounting part; 226. Second mounting part; 23. Driving structure; 231. Driving motor; 232. Adjusting rod; 24. Fixed part.
[0034] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION
[0035] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0036] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.
[0037] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the utility model.
[0038] The utility model provides a range hood 100 .
[0039] See also Figure 1 and Figure 2 In one embodiment of the present invention, the range hood 100 comprises:
[0040] The housing 1 is provided with an oil fume suction passage 11; and
[0041] The diversion structure 2 is used to divide the oil fume suction channel 11 into a left channel 111 and a right channel 112, and to adjust the sizes of the left channel 111 and the right channel 112. The diversion structure 2 includes a rotating part 21 rotatably installed in the oil fume suction channel 11, and an extension part 22 provided on the rotating part 21. The extension part 22 can change the length of the diversion structure 2 to change the ability of the diversion structure 2 to adjust the sizes of the left channel 111 and the right channel 112.
[0042] Specifically, the range hood 100 mainly includes a fume hood, a chassis, a filter, a fume suction channel 11, a fan system and other components. The fan system is arranged in the chassis. When the range hood 100 is working, the fan rotates at a high speed inside the range hood 100, so that there is a certain pressure difference inside and outside the range hood 100, so that the air outside the range hood 100 flows into the range hood 100 through the fume suction channel 11, and the fume generated when cooking food is discharged. Therefore, the smoke hood is provided with an air inlet, and a smoke suction channel 11 is provided in the shell 1 of the range hood 100. The air inlet end of the smoke suction channel 11 is connected to the air inlet, and the air outlet end is connected to the fan system. In order to adapt to the layout of the left and right double stoves in the kitchen, the range hood 100 is usually configured as a double-duct range hood 100, that is, two air inlets are provided on the air guide plate of the smoke hood, temporarily set as the left air inlet and the right air inlet. The diversion structure 2 is usually arranged on the inner side of the air guide plate and between the left air inlet and the right air inlet. The diversion structure 2 divides the smoke suction channel 11 into a left channel 111 and a right channel 112, so the diversion structure 2 is usually arranged below the fan system.
[0043] However, in some cases, the user may only operate a single stove, and only needs to open the left air inlet or the right air inlet. At this time, if the flow areas of the left channel 111 and the right channel 112 are the same, it will inevitably cause a waste of energy and wind power. Therefore, the rotating part 21 can rotate relatively in the oil fume suction channel 11, so as to adjust the size of the left channel 111 and the right channel 112. Suppose the state of the range hood 100 corresponding to the single stove operation is the first working state, and the state corresponding to the simultaneous operation of the two stoves is the second working state. In the first working state, please refer to Figure 1If only the left air inlet needs to be opened, the rotating part 21 rotates to the right, thereby increasing the flow area of the left channel 111 and reducing the flow area of the right channel 112; if only the right air inlet needs to be opened, the rotating part 21 rotates to the left, thereby increasing the flow area of the right channel 112 and reducing the flow area of the left channel 111, thereby improving the suction rate of oil smoke; in the second working state, please refer to Figure 2 At this time, the flow dividing structure 2 rotates to a position where the flow areas of the left channel 111 and the right channel 112 are approximately equal, thereby ensuring uniform air intake. The range hood 100 can also have other working states, that is, the flow areas of the left channel 111 and the right channel 112 can be adjusted arbitrarily according to actual needs.
[0044] Preferably, in the first working state, the smaller the flow area of the left channel 111 or the right channel 112 is, the better the working effect of the range hood 100 is, and the longer the length of the diverter structure 2 is, the easier it is to reduce the flow area of the left channel 111 or the right channel 112 at the extreme position. However, the longer the diverter structure 2 is, the more inconvenient it is to rotate in the smoking channel, and it may even interfere partially with the outer shell 1. However, if the diverter structure 2 is shorter, the effect of adjusting the flow area of the left channel 111 and the right channel 112 is worse. Therefore, an extension part 22 is installed on the rotating part 21, and the extension part 22 can further extend the length of the rotating part 21, so that during the rotation of the diverter structure 2, it rotates with a shorter length (approximately equal to the length of the rotating part 21). When it is at the extreme position, the extension part 21 changes the length of the diverter structure 2 (greater than the length of the rotating part 21) to improve the ability of the diverter structure 2 to adjust the size of the left channel 111 and the right channel 112, thereby reducing the waste of wind power and energy.
[0045] In the embodiment of the present utility model, the extension length of the extension part 22 to the rotating part 21 is greater than or equal to 80 mm and less than or equal to 120 mm. If the extension length of the extension part 22 to the rotating part 21 is less than 80 mm, the maximum length of the diverter structure 2 is too short, and the ability to adjust the size of the left channel 111 and the right channel 112 is limited. If the extension length of the extension part 22 to the rotating part 21 is greater than 120 mm, the maximum length of the diverter structure 2 is too long and may interfere with the housing 1. Specifically, the extension length of the extension part 22 to the rotating part 21 can be 80 mm, 90 mm, 100 mm, 110 mm, 120 mm, etc.
[0046] In the embodiment of the utility model, the rotating part 21 is provided with a limiting slide groove 211, and the extension part 22 is slidably installed in the limiting slide groove 211. Specifically, the extension part 22 adjusts the length of the diversion structure 2 by sliding relative to the rotating part 21, and in order to facilitate the installation of the extension part 22, the rotating part 21 is provided with a limiting slide groove 211, which can both limit the movement direction of the extension part 22 and facilitate the installation of the extension part 22.
[0047] In another embodiment of the present invention, the extension part 22 is configured as a foldable extension structure, that is, the extension part 22 itself can be telescopically folded, and when in the extreme position, the extension part 22 can be opened to extend the length of the diverter structure 2, and when in other positions, the extension part 22 can be retracted to shorten the length of the diverter structure 2. In this case, the extension part 22 can be fixed to the rotating part 21, or can be slidably installed on the rotating part 21.
[0048] In another embodiment of the utility model, the extension portion 22 can be flipped relative to the rotating portion 21, so as to extend the length of the diverter structure 2. The rotating portion 21 and the extension portion 22 can be regarded as an integral foldable plate-like structure, so as to achieve length adjustment of the diverter structure 2.
[0049] When the extension portion 22 is able to slide relative to the rotating portion 21, in the embodiment of the present invention, please refer to Figure 2 and Figure 4 The rotating part 21 is provided with a driving structure 23, and the driving structure 23 drives the extension part 22 to slide. Specifically, the extension part 22 can slide relative to the rotating part 21 under the drive of the driving structure 23, that is, the extension part 22 can be electrically driven or driven by a cylinder to slide, which helps to improve the automation and intelligence of the range hood 100. Of course, in other embodiments, the extension part 22 can also be manually driven to slide relative to the rotating part 21.
[0050] Further, the driving structure 23 includes a driving motor 231 and an adjusting rod 232, and the extension 22 is mounted on the adjusting rod 232, and the driving motor 231 drives the adjusting rod 232 to rotate, so as to drive the extension 22 to slide relative to the rotating part 21. Specifically, one end of the adjusting rod 232 is fixed to the output end of the driving motor 231, so that the adjusting rod 232 is driven to rotate by the driving motor 231, and then the extension 22 is driven to slide relative to the rotating part 21, that is, the adjusting rod 232 can convert the rotational motion of the driving motor 231 into the sliding motion of the extension 22, so as to facilitate the driving motor 231 to drive the extension 22 to move. In other embodiments, the motor can also be configured as a telescopic driving motor 231, that is, the driving motor 231 directly drives the extension 22 to slide, or the driving motor 231 is replaced by a driving cylinder, and the driving cylinder directly drives the extension 22 to slide. In other embodiments, the driving motor 231 and the extension 22 can also be driven by gear rack engagement to achieve a change in the direction of movement.
[0051] For further information, see Figures 3 to 10 , the adjusting rod 232 is configured as a screw rod, the extension part 22 is provided with a screw rod mounting hole 221, and an adjusting member 222 is fixed in the screw rod mounting hole 221, the screw rod is inserted into the screw rod mounting hole 221, and is threadedly matched with the adjusting member 222. Specifically, the adjusting rod 232 is configured as a screw rod, and the extension part 22 is threadedly engaged with the screw rod, thereby ensuring the matching installation of the extension part 22 and the adjusting rod 232, and improving the control accuracy of the driving motor 231 on the movement of the extension part 22. In other embodiments, a threaded groove can also be provided on the adjusting rod 232, and a sliding block can be provided on the corresponding extension part 22, and the sliding block can be slidably installed in the threaded groove.
[0052] See also Figures 7 to 10 , the extension part 22 is provided with a screw rod mounting hole 221, and an adjusting member 222 is fixed in the screw rod mounting hole 221, the screw rod is inserted into the screw rod mounting hole 221, and is threadedly matched with the adjusting member 222, that is, only a part of the hole section of the screw rod mounting hole 221 is threadedly matched. If the extension part 22 is threadedly matched with the entire screw rod mounting hole 221, the threaded matching length of the two is too long, which may cause the adjusting rod 232 to break. And for the convenience of processing, an adjusting member 222 is fixed in the screw rod mounting hole 221, the screw rod is inserted into the screw rod mounting hole 221, and is threadedly matched with the adjusting member 222. For the convenience of installation, the extension part 22 usually includes a first mounting part 225 and a second mounting part 226 spliced together, and the first mounting part 225 and the second mounting part 226 are spliced together to form the screw rod mounting hole 221, and the adjusting member 222 is arranged between the first mounting part 225 and the second mounting part 226. The adjusting member 222 may be configured as a screw nut, and preferably, the adjusting member 222 is disposed at one end of the screw mounting hole 221 facing the driving motor 231 .
[0053] To facilitate the fixing of the driving structure 23, in the embodiment of the present utility model, please refer to Figure 4 , a fixing groove 213 is also provided in the rotating part 21, the driving motor 231 is fixed to the fixing groove 213, and a limiting hole is provided between the limiting slide groove 211 and the fixing groove 213, and the adjusting rod 232 passes through the limiting hole and extends into the limiting slide groove 211. Specifically, a fixing groove 213 is provided in the rotating part 21, and the shape of the fixing groove 213 is adapted to the shape of the driving motor 231, or a clamping structure or a limiting structure is provided inside to fix the driving motor 231. The fixing groove 213 is often spaced apart from the limiting slide groove 211, so a limiting hole is provided between the limiting slide groove 211 and the fixing groove 213, and the adjusting rod 232 passes through the limiting hole and extends into the limiting slide groove 211, and the size of the limiting hole is smaller than the cross-sectional area of the extension part 22, so as to reduce the possibility that the extension part 22 excessively moves in the direction close to the driving motor 231, causing it to penetrate into the limiting hole.
[0054] In order to reduce the possibility of the extension part 22 being separated from the limiting slide groove 211, in the embodiment of the utility model, a limiting ring protrusion 223 is convexly provided on the side of the extension part 22 close to the driving motor 231, and a limiting flange 214 is provided on the opening edge of the limiting slide groove 211, and the limiting flange 214 abuts against the limiting ring protrusion 223 to prevent the extension part 22 from being separated from the limiting slide groove 211. Specifically, a limiting ring protrusion 223 is convexly provided on the side of the extension part 22 close to the driving motor 231, and a limiting flange 214 is provided on the opening edge of the limiting slide groove 211. When the extension part 22 moves to the opening of the limiting slide groove 211, the limiting flange 214 abuts against the side of the limiting ring protrusion 223 away from the driving motor 231 to prevent the extension part 22 from being separated from the limiting slide groove 211.
[0055] The limiting annular protrusion 223 can be integrally formed on the extension portion 22, thereby ensuring the structural stability of the extension portion 22 and reducing the assembly process of the limiting annular protrusion 223 and the extension portion 22. Of course, in other embodiments, the limiting annular protrusion 223 can also be bonded or clamped to the extension portion 22. The limiting slide groove 211 can be integrally formed on the extension portion 22, thereby ensuring the convenient installation stability of the limiting, and reducing the assembly process of the limiting annular protrusion 223 and the limiting slide groove 211. Of course, in other embodiments, the limiting annular protrusion 223 can also be bonded or clamped to the limiting slide groove 211.
[0056] In order to ensure the movement stability of the extension portion 22, in the embodiment of the present utility model, please refer to Figure 5 and Figure 6, one of the groove wall of the limiting slide groove 211 and the extension part 22 is arranged in the guide groove 212, and the other is provided with a guide rib 224, and the guide rib 224 is slidably installed in the guide groove 212. Specifically, the guide rib 224 extends along the movement direction of the extension part 22, and the guide rib 224 is slidably installed in the guide groove 212, so as to guide the movement of the extension part 22 and reduce the friction resistance. The guide groove 212 is configured as a plurality of groove sections arranged at intervals, that is, a plurality of convex ribs arranged at intervals along the movement direction of the extension part 22 are provided in the limiting slide groove 211, and the guide groove 212 is opened at the convex rib.
[0057] The guide groove 212 is provided in the position-limiting slide groove 211, and the guide rib 224 is correspondingly provided in the extension portion 22; or, the guide groove 212 is provided in the extension portion 22, and the guide rib 224 is correspondingly provided in the position-limiting slide groove 211. In other embodiments, one of the groove wall of the position-limiting slide groove 211 and the extension portion 22 is provided in the guide groove 212, and the other is provided with a guide slider, and the guide rib 224 is slidably mounted on the guide slider.
[0058] To facilitate the installation of the diversion structure 2, please refer to Figure 1 and Figure 2 In an embodiment of the utility model, the diverter structure 2 further includes a fixed portion 24, the fixed portion 24 is mounted on the housing 1, the rotating portion 21 is rotatably mounted on the fixed portion 24, and the extension portion 22 is mounted on the rotating portion 21. Specifically, the fixed portion 24 and the rotating portion 21 together separate the oil fume suction channel 11 into a left channel 111 and a right channel 112, and the rotating portion 21 is mounted on the housing 1 through the fixed portion 24, thereby facilitating the installation of the diverter structure 2. And preferably, the rotating portion 21 is rotatably mounted on one end of the fixed portion 24, and the extension portion 22 is mounted on the end of the rotating portion 21 away from the fixed portion 24. Compared with directly mounting the rotating portion 21 on the housing 1, this solution helps to improve the installation stability of the diverter structure 2. Of course, in other embodiments, it can also be directly mounted on the housing 1 through the rotating portion 21.
[0059] The above are only exemplary embodiments of the present invention, and are not intended to limit the patent scope of the present invention. All equivalent structural changes made using the contents of the present invention specification and drawings under the technical concept of the present invention, or direct / indirect applications in other related technical fields are included in the patent protection scope of the present invention.
Claims
1. A range hood, characterized in that: include: The outer shell is provided with an oil fume suction passage; as well as The diversion structure is used to divide the oil fume suction channel into a left channel and a right channel, and adjust the size of the left channel and the right channel. The diversion structure includes a rotating part rotatably installed in the oil fume suction channel, and an extension part provided on the rotating part. The extension part can change the length of the diversion structure to change the ability of the diversion structure to adjust the size of the left channel and the right channel.
2. The range hood according to claim 1, characterized in that: The rotating part is provided with a limiting sliding groove, and the extension part is slidably installed in the limiting sliding groove.
3. The range hood according to claim 2, characterized in that: The rotating part is provided with a driving structure, and the driving structure drives the extending part to slide.
4. The range hood according to claim 3, characterized in that: The driving structure comprises a driving motor and an adjusting rod, the extension part is mounted on the adjusting rod in cooperation, and the driving motor drives the adjusting rod to rotate, so as to drive the extension part to slide relative to the rotating part.
5. The range hood according to claim 4, characterized in that: The adjusting rod is configured as a screw rod, the extension portion is provided with a screw rod mounting hole, and an adjusting piece is fixed in the screw rod mounting hole. The screw rod is inserted into the screw rod mounting hole and is threadedly matched with the adjusting piece.
6. The range hood according to claim 4, characterized in that: A fixing groove is also provided in the rotating part, the driving motor is fixed in the fixing groove, and a limiting hole is provided between the limiting sliding groove and the fixing groove, and the adjusting rod passes through the limiting hole and extends into the limiting sliding groove.
7. The range hood according to claim 4, characterized in that: A limiting ring protrusion is convexly provided on one side of the extension portion close to the drive motor, and a limiting flange is provided on the opening edge of the limiting slide groove, and the limiting flange abuts against the limiting ring protrusion to prevent the extension portion from escaping from the limiting slide groove.
8. The range hood according to claim 2, characterized in that: One of the groove wall of the limiting sliding groove and the extension part is arranged in the guide groove, and the other is provided with a guide rib, and the guide rib is slidably installed in the guide groove.
9. The range hood according to claim 1, characterized in that: The extension length of the extension portion relative to the rotating portion is greater than or equal to 80 mm and less than or equal to 120 mm.
10. The range hood according to claim 1, characterized in that: The extension portion is configured as an extension structure that can be folded.
11. The range hood according to claim 1, characterized in that: The extension portion can be flipped relative to the rotation portion.
12. The range hood according to any one of claims 1 to 11, characterized in that: The diversion structure further includes a fixed portion, the fixed portion is mounted on the housing, the rotating portion is rotatably mounted on the fixed portion, and the extension portion is mounted on the rotating portion.