A desktop range hood

Abstract

The utility model belongs to range hood technical field, especially relates to a kind of desktop range hood, including mounting seat and base, air duct is provided in mounting seat, filter assembly and fan are provided in air duct, fan drives air in air duct to pass through filter assembly, mounting seat includes the range hood main body and extension bar of rotation connection, extension bar is movably connected with base and the distance between range hood main body and base can be changed, air duct is arranged in range hood main body;Base is provided with oil storage box for storing oil dirt, the first oil guide hole that range hood main body lower side is provided with and is communicated with air duct, second oil guide hole is provided on base and is communicated with oil storage box, oil pipe is connected on the first oil guide hole, oil pipe is arranged in second oil guide hole, oil dirt filtered on filter assembly can be guided into oil storage box by the first oil guide hole, oil pipe and second oil guide hole, the purpose of the utility model is to provide a kind of desktop range hood with good stability and it is convenient for user to use.

Description

Technical Field

[0001] This utility model belongs to the field of range hood technology, and specifically relates to a desktop range hood. Background Technology

[0002] A range hood, also known as a kitchen exhaust fan, is a kitchen appliance that purifies the kitchen environment. It can quickly remove waste from stove combustion and harmful fumes produced during cooking, while condensing and collecting the fumes to reduce pollution, purify the air, and provide safety features such as protection against poisoning and explosions.

[0003] Traditional range hoods are mostly fixed to the wall and have gas ducts extending outdoors. However, these range hoods are generally fixed in the kitchen and cannot be moved, making them inconvenient for users in the dining room or living room. Therefore, some tabletop range hoods have appeared on the market, such as the one with Chinese utility model patent CN. A desktop range hood disclosed in 202321375025.0 includes a range hood body and a base. The range hood body is mounted on the base via a column. The range hood body includes a duct shell, with an air inlet front cover and an air outlet rear cover at the front and rear ends, respectively. A fan assembly is installed inside the duct shell. The air inlet front cover is detachably fixed to the front end of the duct shell. Filters made of different materials are replaceably installed inside the duct shell and in front of the fan assembly. The base has a side opening with a cavity for storing filter storage boxes containing various filter screens. A recess for storing an oil collection box is formed on the lower front end of the duct shell. The oil collection box is retractable and located in the recess, below the filter screen. An oil drain is provided on the rear side of the air inlet front cover below a fixing ring. Oil and gas absorbed by the filter screen are condensed and drip into the oil collection box through the oil drain.

[0004] In the above structure, the oil collection box is located on the lower front side of the duct shell. Although this structure is convenient for production and processing, it is small in size and requires frequent cleaning by the user. Moreover, this structure can easily cause the desktop range hood to be top-heavy and unstable, making it easy to tip over accidentally. Since the main body of the range hood and the base need to rotate relative to each other during use, the liquid in the oil collection box can easily spill out accidentally, affecting the normal use of the desktop range hood. Summary of the Invention

[0005] In order to overcome the defects in the prior art, the purpose of this utility model is to provide a desktop range hood that is stable and easy for users to use.

[0006] The purpose of this utility model is achieved as follows:

[0007] A desktop range hood includes a mounting base and a base. The mounting base has an air duct, a filter assembly, and a fan. The fan drives air in the air duct through the filter assembly. The mounting base includes a range hood body and an extension rod rotatably connected. The extension rod is movably connected to the base and can change the distance between the range hood body and the base. The air duct is located within the range hood body. The base has an oil collection box for storing grease. The lower side of the range hood body has a first oil guide hole communicating with the air duct. The base has a second oil guide hole communicating with the oil collection box. An oil pipe is connected to the first oil guide hole. The oil pipe is flexible and deformable, passes through the second oil guide hole, and can move relative to it. Grease filtered by the filter assembly can enter the oil collection box through the first oil guide hole, the oil pipe, and the second oil guide hole.

[0008] Controlling the relative rotation of the range hood body and the extension rod, or controlling the relative movement of the extension rod and the base, allows the range hood body to pull the oil pipe and make the oil pipe move relative to each other in the second oil guide hole.

[0009] The present invention is further configured such that: the base includes a base plate and a guide rod, the base plate is provided with a positioning slot, the guide rod is provided with a positioning part adapted to the positioning slot, and the side wall of the positioning slot and the side wall of the guide rod are respectively provided with a slot and an elastic hook, the slot and the elastic hook cooperate to keep the positioning slot and the positioning part connected, and to fix the base plate and the guide rod relatively.

[0010] The present invention is further configured such that: the extension rod is slidably connected to the base, and the base is provided with a positioning component for controlling the extension rod to be relatively fixed to the base, and the base is provided with a connecting pipe, the second oil guide hole is provided in the connecting pipe, and the extension rod is provided with a connecting groove that is slidably connected to the connecting pipe.

[0011] The present invention is further configured such that: a plurality of positioning grooves are provided at intervals on the extension rod, the positioning grooves are provided at intervals along the sliding direction of the extension rod, and a first elastic element is provided on the base. The first elastic element can drive the positioning element to cooperate with the positioning groove and fix the extension rod and the base relatively. The distance between the range hood body and the base is different when the positioning element cooperates with different positioning grooves.

[0012] The present invention is further configured such that: a limiting flange is provided on the extension rod, and a limiting wall adapted to the limiting flange is provided on the base. The limiting wall can abut against the limiting flange to limit the sliding range of the extension rod and the base, thereby preventing the extension rod from separating from the base and preventing the oil pipe from separating from the second oil guide hole.

[0013] The present invention is further configured such that: the extension rod is provided with an installation cavity, and the oil pipe passes through the installation cavity and is connected to the second oil guide hole.

[0014] The present invention is further configured such that: a limiting rod is provided on the extension rod, and a limiting swing groove is provided on the range hood body; the limiting rod and the limiting swing groove cooperate to limit the rotation range of the range hood body and the extension rod.

[0015] The present invention is further configured such that: the extension rod is provided with a hinge groove, the range hood body is provided with a hinge part adapted to the hinge groove, and at least two fixing grooves are provided on the side wall of the hinge groove; the hinge part is provided with a second elastic member and a locking member; the second elastic member can drive the locking member to cooperate with the fixing groove and fix the range hood body and the extension rod relatively; and the locking member cooperates with different fixing grooves to make the tilt angle between the range hood body and the extension rod different.

[0016] The present invention is further configured such that: a storage cavity is provided in the base, an oil storage box is slidably disposed in the storage cavity, a second oil guide hole is connected to the upper end of the storage cavity, one side of the storage cavity extends to the side of the base and forms an opening, and the liquid storage cavity can pass through the opening.

[0017] The present invention is further configured such that: an oil outlet is provided on the upper side of the receiving cavity, which communicates with the second oil guide hole; an annular anti-cavity groove is provided on the outer periphery of the oil outlet; an oil inlet is provided at the upper end of the oil storage box; and the oil outlet is located above the oil inlet.

[0018] The advantages of this utility model compared to the prior art are:

[0019] 1. In this utility model, the oil storage box is set in the base, which prevents the oil storage box from shaking during the movement and adjustment of the desktop range hood, avoiding accidental spillage of oil. Manufacturers can also use a larger oil storage box, which allows for the storage of more oil, reducing the need for frequent cleaning and improving user convenience. The oil storage box and the oil within it also increase the weight of the base, improving the stability of the desktop range hood and preventing accidental tipping. Furthermore, because the oil pipe passes through the second oil guide hole and can move relative to it, the oil pipe is less prone to bending or deformation during relative movement between the range hood body and the base, preventing interference with oil flow and further enhancing user convenience.

[0020] 2. In this utility model, the base plate and guide rod are positioned by positioning slots and positioning parts, and are relatively fixed by slots and elastic hooks. This structure is simple, facilitates the production of the base and quick assembly, and can avoid the large size of the desktop range hood caused by the base and guide rod being relatively fixed during the movement and transportation, making it convenient for the storage and transportation of the desktop range hood.

[0021] 3. In this utility model, the positioning component and the slidingly connected extension rod and base facilitate the user's adjustment of the height of the range hood body, making it convenient for flexible use of the desktop range hood. The sliding connection of the connecting pipe and connecting groove facilitates the stable sliding of the extension rod and the stable movement of the oil pipe and the second oil guide hole, preventing the oil pipe from bending or separating from the second oil guide hole during use. The simple structure of the positioning component and several positioning grooves facilitates the positioning connection between the extension rod and the base. The first elastic component facilitates the adjustment and control of the positioning component and ensures that the positioning component and the positioning groove maintain a connection and fit. The simple structure of the limiting flange and limiting wall facilitates production and processing. This structure not only prevents the extension rod from separating from the base but also prevents the oil pipe from separating from the second oil guide hole, making it convenient for the adjustment and use of the desktop range hood.

[0022] 4. The installation cavity in this utility model facilitates the concealment of the oil pipe, preventing external objects from contacting the oil pipe during use, avoiding accidental detachment of the oil pipe from the second oil guide hole, and preventing oil spillage. This makes it convenient for users. The limiting rod and limiting swing groove limit the rotation range of the range hood body and extension rod, preventing excessive rotation angles that could cause the oil pipe to bend and become blocked. This also makes it convenient for users. The hinge groove and hinge part facilitate a stable connection between the range hood body and the extension rod. The structure of the second elastic element, locking element, and multiple fixing grooves allows the range hood body and extension rod to be relatively fixed at multiple angles, preventing free rotation of the range hood body and extension rod during use and avoiding interference with the use of the desktop range hood.

[0023] 5. The storage cavity in this utility model facilitates the concealment and storage of the oil storage box, while the opening on the side of the storage slot allows the user to control the oil storage box to slide laterally and detach from the base, making it convenient for the user to remove the oil storage box and clean the oil stains; the oil outlet and the anti-cavity groove prevent oil stains from flowing to the outer periphery of the oil outlet, which helps to keep the base clean and hygienic and is convenient for the user. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of this utility model;

[0025] Figure 2 This is a diagram showing the usage state of this utility model.

[0026] Figure 3 This is a cross-sectional view of the utility model in use;

[0027] Figure 4 This is an exploded view of the present invention;

[0028] Figure 5 This is a cross-sectional view of the connection structure between the hinge and the extension rod in this utility model;

[0029] Figure 6This is a schematic diagram of the structure of the base plate in this utility model;

[0030] Figure 7 This is a cross-sectional view of the guide rod in this utility model;

[0031] Figure 8 This is a schematic diagram of the guide rod structure in this utility model;

[0032] Figure 9 This is a schematic diagram of the main body of the range hood in this utility model;

[0033] Figure 10 This is a schematic diagram of the extension rod in this utility model;

[0034] Figure 11 This is a cross-sectional view of the extension rod in this utility model;

[0035] Figure 12 This is a cross-sectional view of the oil storage box in this utility model.

[0036] The labels in the diagram mean: 1-base; 11-base plate; 12-guide rod; 13-second oil guide hole; 14-connecting pipe; 15-storage cavity; 16-through hole; 17-positioning slot; 18-slot; 121-slide groove; 122-through groove;

[0037] 123-Positioning part; 124-Elastic hook; 125-Guide surface; 126-Oil outlet; 127-Void relief groove;

[0038] 128-Limiting wall; 2-Mounting base; 21-Range hood body; 22-Extension rod; 211-Hinge;

[0039] 212-Limiting swing groove; 213-Mounting hole; 214-Flow guide seat; 215-First oil guide hole; 216-Air duct; 217-Mounting groove; 221-Positioning groove; 222-Limiting flange; 223-Hinge groove; 224-Mounting cavity;

[0040] 225 - Limiting rod; 226 - Fixing groove; 227 - Connecting groove; 3 - Positioning component; 31 - First elastic component;

[0041] 4-Filter assembly; 41-Fan; 5-Handle; 6-Oil pipe; 7-Oil reservoir; 71-Housing shell; 72-Top cover; 73-Pull rope; 74-Oil inlet; 75-Storage cavity; 8-Locking element; 81-Second elastic element. Detailed Implementation

[0042] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0043] See Figures 1 to 12As shown, a desktop range hood includes a mounting base 2 and a base 1. The mounting base 2 has an air duct 216, a filter assembly 4, and a fan 41. The fan 41 drives air in the air duct 216 through the filter assembly 4. The mounting base 2 includes a range hood body 21 rotatably connected to an extension rod 22. The extension rod 22 is movably connected to the base 1 and can change the distance between the range hood body 21 and the base 1. The air duct 216 is disposed in the range hood body 21. The base 1 has a [missing information - likely a device or feature] for... The oil collection box 7 is installed in the base 1 to store oil. During the movement and adjustment of the desktop range hood, the oil collection box 7 is not easy to shake, which prevents the oil in the oil collection box 7 from accidentally spilling. In addition, the manufacturer can use a larger oil collection box 7, which is conducive to storing more oil. Users do not need to clean the oil collection box 7 frequently, which is convenient for users. In this structure, the oil collection box 7 and the oil in the oil collection box 7 will increase the weight of the base 1, which will help improve the stability of the desktop range hood and prevent the desktop range hood from accidentally tipping over.

[0044] The lower side of the range hood body 21 is provided with a first oil guide hole 215 communicating with the air duct 216, and the base 1 is provided with a second oil guide hole 13 communicating with the oil collection box 7. An oil pipe 6 is connected to the first oil guide hole 215. The oil pipe 6 is flexible and deformable. The oil pipe 6 passes through the second oil guide hole 13 and can move relative to the second oil guide hole 13. The oil sludge filtered by the filter assembly 4 can enter the oil collection box 7 through the first oil guide hole 215, the oil pipe 6 and the second oil guide hole 13. By controlling the relative rotation of the range hood body 21 and the extension rod 22, or by controlling the relative movement of the extension rod 22 and the base 1, the range hood body 21 can pull the oil pipe 6 to move and make the oil pipe 6 move relative to the second oil guide hole 13. In this structure, since the oil pipe 6 passes through the second oil guide hole 13 and can move relative to the second oil guide hole 13, the oil pipe 6 is not easy to bend or deform during the relative movement of the range hood body 21 and the base 1, so as to avoid affecting the passage of oil sludge through the oil pipe 6 and making it convenient for users.

[0045] In this utility model, the filter assembly 4 and the fan 41 are common structures found in desktop range hoods and kitchen exhaust fans. Therefore, although the structure of the filter assembly 4 and the fan 41 is not specifically described in this utility model, those skilled in the art can implement this technical solution by combining the existing technology. In this embodiment, the filter assembly 4 is provided with a stainless steel filter screen, an aluminum foil filter screen, or a non-woven fabric filter membrane, and the fan 41 includes fan blades and a motor for driving the fan blades. The motor housing is electrically connected to a battery pack or a household power supply.

[0046] In this embodiment, a handle 5 is rotatably provided on the main body 21 of the range hood, which allows the user to lift the desktop range hood through the handle 5, making it convenient to move the desktop range hood and use it.

[0047] The base 1 includes a base plate 11 and a guide rod 12. To improve the stability of the desktop range hood, the base plate 11 typically occupies a large area, and the base plate 11 and guide rod 12 are arranged in a T-shape. This structure is bulky, inconvenient for storage and transportation, and the base plate 11 and guide rod 12 are easily bent and damaged. To facilitate the sale and movement of the desktop range hood, it is preferable that the base plate 11 and guide rod 12 can be separated from each other. The base plate 11 is provided with a positioning slot 17, and the guide rod 12 is provided with a positioning part 123 that matches the positioning slot 17. The side walls of the positioning slot 17 and the side walls of the guide rod 12 are respectively provided with... The base 11 is provided with a slot 18 and a flexible hook 124. The slot 18 and the flexible hook 124 cooperate to keep the positioning slot 17 and the positioning part 123 connected, and to fix the base plate 11 and the guide rod 12 relatively. In this structure, the base plate 11 and the guide rod 12 are positioned by the positioning slot 17 and the positioning part 123, and are relatively fixed by the slot 18 and the flexible hook 124. This structure is simple, convenient for the production of the base 1 and quick assembly. In addition, this structure can avoid the base 1 and the guide rod 12 being relatively fixed during the movement and transportation, resulting in a large volume of the desktop range hood, which is convenient for the storage and transportation of the desktop range hood.

[0048] In this embodiment, the elastic hook 124 is provided with a guide surface 125 near the end or bottom of the positioning slot 17. The guide surface 125 can abut against the side wall of the positioning slot 17 and deform the elastic hook 124, so that the elastic hook 124 can cooperate with the slot 18. This structure facilitates the rapid assembly of the base plate 11 and the guide rod 12.

[0049] In this utility model, the extension rod 22 is slidably connected to the base 1, and the base 1 is provided with a positioning component 3 to control the extension rod 22 and the base 1 to be relatively fixed. The slidably connected extension rod 22 and base 1 make it easy for the user to adjust the height of the range hood body 21, which facilitates the flexible use of the desktop range hood, and also facilitates the stable movement of the oil pipe 6 and the second oil guide hole 13, avoiding the oil pipe 6 from bending or separating from the second oil guide hole 13 during use.

[0050] Preferably, a connecting pipe 14 is provided on the base 1, and a second oil guide hole 13 is provided in the connecting pipe 14. The extension rod 22 is provided with a connecting groove 227 that is slidably connected to the connecting pipe 14. This structure is beneficial to further improve the stability of the movement of the oil pipe 6 and the second oil guide hole 13, and avoid the oil pipe 6 bending or the oil pipe 6 separating from the second oil guide hole 13 during use. In this embodiment, the connecting pipe 14 is detachably provided on the base 1, and the manufacturer can install connecting pipes 14 of different specifications on the base 1 as needed.

[0051] The extension rod 22 is provided with a plurality of positioning grooves 221 at intervals. The positioning grooves 221 are arranged at intervals along the sliding direction of the extension rod 22. The base 1 is provided with a first elastic element 31. The first elastic element 31 can drive the positioning element 3 to cooperate with the positioning grooves 221 and fix the extension rod 22 and the base 1 relatively. When the positioning element 3 cooperates with different positioning grooves 221, the distance between the range hood body 21 and the base 1 is different. The structure of the positioning element 3 and the plurality of positioning grooves 221 is simple and facilitates the positioning connection between the extension rod 22 and the base 1. The setting of the first elastic element 31 facilitates the adjustment and control of the positioning element 3 and facilitates the connection and cooperation between the positioning element 3 and the positioning grooves 221.

[0052] In this embodiment, the base 1 is provided with a sliding groove 121, the extension rod 22 is slidably disposed in the sliding groove 121, the positioning member 3 is rotatably disposed on the outside of the base 1, and a through groove 122 is provided on the side wall of the sliding groove 121. The first elastic member 31 drives the positioning member 3 to swing, and the positioning member 3 passes through the through groove 122 and cooperates with the positioning groove 221.

[0053] The extension rod 22 is provided with a limiting flange 222, and the base 1 is provided with a limiting wall 128 adapted to the limiting flange 222. The limiting wall 128 can abut against the limiting flange 222 to limit the sliding range of the extension rod 22 and the base 1, which can prevent the extension rod 22 from separating from the base 1 and prevent the oil pipe 6 from separating from the second oil guide hole 13. The structure of the limiting flange 222 and the limiting wall 128 is simple and convenient for production and processing. Moreover, this structure can not only prevent the extension rod 22 from separating from the base 1, but also prevent the oil pipe 6 from separating from the second oil guide hole 13, which is convenient for the adjustment and use of the desktop range hood.

[0054] The extension rod 22 is provided with a mounting cavity 224. The oil pipe 6 passes through the mounting cavity 224 and is connected to the second oil guide hole 13. The mounting cavity 224 is designed to facilitate the concealment of the oil pipe 6, prevent external objects from contacting the oil pipe 6 during use, prevent the oil pipe 6 from accidentally detaching from the second oil guide hole 13 and the resulting oil spillage, and make it convenient for users to use.

[0055] In this invention, the extension rod 22 is provided with a limiting rod 225, and the range hood body 21 is provided with a limiting swing groove 212. The limiting rod 225 and the limiting swing groove 212 cooperate to limit the rotation range of the range hood body 21 and the extension rod 22. The setting of the limiting rod 225 and the limiting swing groove 212 can limit the rotation range of the range hood body 21 and the extension rod 22, and prevent the oil pipe 6 from bending and getting blocked due to excessive rotation angle of the range hood body 21 and the extension rod 22, which is convenient for users.

[0056] The extension rod 22 is provided with a hinge groove 223, and the range hood body 21 is provided with a hinge part 211 adapted to the hinge groove 223. At least two fixing grooves 226 are provided on the side wall of the hinge groove 223. The hinge part 211 is provided with a second elastic element 81 and a locking element 8. The second elastic element 81 can drive the locking element 8 to cooperate with the fixing groove 226 and fix the range hood body 21 and the extension rod 22 relative to each other. The locking element 8 cooperates with different fixing grooves 226 to make the tilt angle of the range hood body 21 and the extension rod 22 different. The setting of the hinge groove 223 and the hinge part 211 facilitates the stable connection between the range hood body 21 and the extension rod 22. The structure of the second elastic element 81, the locking element 8 and the multiple fixing grooves 226 facilitates the fixation of the range hood body 21 and the extension rod 22 at multiple angles, and avoids the free rotation of the range hood body 21 and the extension rod 22 during use, which affects the use of the desktop range hood.

[0057] Preferably, the hinge groove 223 is provided with a limiting rod 225 and a fixing groove 226 on both sides, the hinge part 211 is provided with a limiting swing groove 212 on both sides, and the hinge part 211 is provided with a mounting hole 213 on both sides. The second elastic member 81 and the locking member 8 are both provided in the mounting hole 213. In this embodiment, the locking member 8 is a spherical ball, and the fixing groove 226 is an arc-shaped groove adapted to the spherical ball. When the external force controls the smoke machine body 21 and the extension rod 22, the locking member 8 can disengage from the fixing groove 226 and make the smoke machine body 21 and the extension rod 22 rotate relative to each other.

[0058] In this embodiment, the hinge portion 211 is provided with a mounting groove 217, and the first oil guide hole 215 is provided in the mounting groove 217. The mounting groove 217 communicates with the mounting cavity 224. The limiting rod 225 cooperates with the limiting swing groove 212 to avoid the mounting groove 217 and the mounting cavity 224 from squeezing and shearing the oil pipe 6, thus avoiding the blockage of the oil pipe 6 and making it convenient for users to use. Preferably, the hinge portion 211 is provided with a flow guide seat 214, and the first oil guide hole 215 is provided below the flow guide seat 214. The flow guide seat 214 extends to the front and rear sides of the filter assembly 4 respectively. During use, the oil on the front and rear sides of the filter assembly 4 can flow into the flow guide seat 214 and enter the oil pipe 6 through the first oil guide hole 215.

[0059] The base 1 is provided with a storage cavity 15, and the oil storage box 7 is slidably disposed in the storage cavity 15. The second oil guide hole 13 is connected to the upper end of the storage cavity 15. One side of the storage cavity 15 extends to the side of the base 1 and forms an opening. The liquid storage cavity can pass through the opening. The storage cavity 15 is designed to facilitate the concealment and storage of the oil storage box 7. The opening on the side of the storage cavity makes it easy for the user to control the oil storage box 7 to slide laterally and detach from the base 1, making it convenient for the user to take out the oil storage box 7 and clean the oil stains.

[0060] Preferably, a pull rope 73 is provided on the side of the oil storage box 7, and the user can control the oil storage box 7 to detach from the storage cavity 15 by pulling the rope 73.

[0061] In this utility model, the upper side of the storage cavity 15 is provided with an oil outlet 126 that communicates with the second oil guide hole 13. The outer periphery of the oil outlet 126 is provided with an annular clearance groove 127. The upper end of the oil storage box 7 is provided with an oil inlet 74. The oil outlet 126 is located above the oil inlet 74. The oil outlet 126 and the clearance groove 127 prevent oil from flowing to the outer periphery of the oil outlet 126, which helps to keep the base 1 clean and hygienic and is convenient for users.

[0062] In this embodiment, the oil storage box 7 includes a detachably connected shell 71 and a top cover 72, which are formed between the shell 71 and the top cover 72. An oil inlet 74 is provided on the top cover 72 and communicates with the storage cavity 75. The bottom plate 11 is provided with a through hole 16 that communicates with the storage cavity 15 and the positioning slot 17. An oil outlet 126 and an oil inlet 74 are respectively provided on the upper and lower sides of the through hole 16.

[0063] The above embodiments are merely preferred embodiments of the present utility model and are not intended to limit the scope of protection of the present utility model. Therefore, all equivalent changes made to the structure, shape, and principle of the present utility model should be covered within the scope of protection of the present utility model.

Claims

1. A desktop range hood, comprising a mounting base (2) and a base (1), wherein the mounting base (2) is provided with an air duct (216), and the air duct (216) is provided with a filter assembly (4) and a fan (41), the fan (41) driving air in the air duct (216) through the filter assembly (4), characterized in that: The mounting base (2) includes a range hood body (21) and an extension rod (22) rotatably connected. The extension rod (22) is movably connected to the base (1) and can change the distance between the range hood body (21) and the base (1). The air duct (216) is set in the range hood body (21). The base (1) is provided with an oil collection box (7) for storing oil. The lower side of the range hood body (21) is provided with a first oil guide hole (2) communicating with the air duct (216). 15) The base (1) is provided with a second oil guide hole (13) that communicates with the oil storage box (7). An oil pipe (6) is connected to the first oil guide hole (215). The oil pipe (6) can be bent and deformed. The oil pipe (6) passes through the second oil guide hole (13) and can move relative to the second oil guide hole (13). The oil sludge filtered by the filter assembly (4) can enter the oil storage box (7) through the first oil guide hole (215), the oil pipe (6) and the second oil guide hole (13). Control the relative rotation of the range hood body (21) and the extension rod (22), or control the relative movement of the extension rod (22) and the base (1), so that the range hood body (21) can pull the oil pipe (6) to move and make the oil pipe (6) move relative to each other in the second oil guide hole (13).

2. A desktop range hood according to claim 1, characterized in that: The base (1) includes a base plate (11) and a guide rod (12). The base plate (11) is provided with a positioning slot (17), and the guide rod (12) is provided with a positioning part (123) adapted to the positioning slot (17). The side wall of the positioning slot (17) and the side wall of the guide rod (12) are respectively provided with a slot (18) and an elastic hook (124). The slot (18) and the elastic hook (124) cooperate to keep the positioning slot (17) and the positioning part (123) connected, and to fix the base plate (11) and the guide rod (12) relatively.

3. A desktop range hood according to claim 1 or 2, characterized in that: The extension rod (22) is slidably connected to the base (1), and the base (1) is provided with a positioning component (3) to control the extension rod (22) to be relatively fixed to the base (1). The base (1) is provided with a connecting pipe (14), the second oil guide hole (13) is provided in the connecting pipe (14), and the extension rod (22) is provided with a connecting groove (227) that is slidably connected to the connecting pipe (14).

4. A desktop range hood according to claim 3, characterized in that: The extension rod (22) is provided with a number of positioning grooves (221) spaced apart. The positioning grooves (221) are spaced apart along the sliding direction of the extension rod (22). The base (1) is provided with a first elastic element (31). The first elastic element (31) can drive the positioning element (3) to cooperate with the positioning groove (221) and fix the extension rod (22) and the base (1) relatively. When the positioning element (3) cooperates with different positioning grooves (221), the distance between the range hood body (21) and the base (1) is different.

5. A desktop range hood according to claim 4, characterized in that: The extension rod (22) is provided with a limiting flange (222), and the base (1) is provided with a limiting wall (128) adapted to the limiting flange (222). The limiting wall (128) can abut against the limiting flange (222) to limit the sliding range of the extension rod (22) and the base (1), thereby preventing the extension rod (22) from separating from the base (1) and preventing the oil pipe (6) from separating from the second oil guide hole (13).

6. A desktop range hood according to claim 1, 2, 4, or 5, characterized in that: The extension rod (22) is provided with a mounting cavity (224), and the oil pipe (6) is inserted into / passes through the mounting cavity (224) and connected to the second oil guide hole (13).

7. A desktop range hood according to claim 6, characterized in that: The extension rod (22) is provided with a limiting rod (225), and the range hood body (21) is provided with a limiting swing groove (212). The limiting rod (225) and the limiting swing groove (212) cooperate to limit the rotation range of the range hood body (21) and the extension rod (22).

8. A desktop range hood according to claim 6, characterized in that: The extension rod (22) is provided with a hinge groove (223), and the range hood body (21) is provided with a hinge part (211) adapted to the hinge groove (223). At least two fixing grooves (226) are provided on the side wall of the hinge groove (223). The hinge part (211) is provided with a second elastic element (81) and a locking element (8). The second elastic element (81) can drive the locking element (8) to cooperate with the fixing groove (226) and fix the range hood body (21) and the extension rod (22) relative to each other. The locking element (8) cooperates with different fixing grooves (226) to make the tilt angle of the range hood body (21) and the extension rod (22) different.

9. A desktop range hood according to any one of claims 1, 2, 4, 5, 7, or 8, characterized in that: The base (1) is provided with a storage cavity (15), and the oil storage box (7) is slidably disposed in the storage cavity (15). The second oil guide hole (13) is connected to the upper end of the storage cavity (15). One side of the storage cavity (15) extends to the side of the base (1) and forms an opening, through which the oil storage box (7) can pass.

10. A desktop range hood according to claim 9, characterized in that: The upper side of the receiving cavity (15) is provided with an oil outlet (126) that communicates with the second oil guide hole (13). An annular anti-cavity groove (127) is provided on the outer periphery of the oil outlet (126). An oil inlet (74) is provided at the upper end of the oil storage box (7), and the oil outlet (126) is located above the oil inlet (74).

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