Tabletop range hood

Abstract

The invention discloses a desktop range hood, and belongs to the technical field of range hoods. The table top range hood comprises a base, a wind wheel assembly, a wind shell and a filter screen. The base is provided with a containing cavity, an air inlet hole and an opening which are communicated; the wind wheel assembly is arranged in the containing cavity, and the wind wheel assembly can suck air through the air inlet and output the air to the opening. The air shell is arranged on the opening and provided with a lampblack channel and an annular air outlet, the lampblack channel penetrates through the two opposite ends of the air shell, the annular air outlet communicates with the opening and the lampblack channel, and the annular air outlet can output air of the opening towards the exhaust end of the lampblack channel, so that the suction end of the lampblack channel generates negative pressure to suck lampblack and the lampblack flows to the exhaust end. The table top range hood disclosed by the invention has the advantage of reducing the cleaning and maintenance burden.

Description

Technical Field

[0001] The invention relates to the technical field of range hoods, and in particular to a desktop range hood. Background Art

[0002] As people's quality of life continues to improve, desktop range hoods, as a miniaturized table fume purification equipment, have gradually become an indispensable auxiliary tool in dining scenes such as hot pot and barbecue. Its main function is to efficiently extract the fumes generated during the cooking process, thereby significantly improving the dining environment and creating a more comfortable and clean dining experience for users. At present, various desktop range hood products have emerged on the market, for example, a desktop range hood disclosed in the Chinese utility model patent with reference publication number CN220471708U. However, traditional desktop range hood designs mostly use an exposed fan blade structure. Although this structure can drive the fan blades to rotate through a motor to achieve the suction and discharge of fumes, it exposes some technical problems in actual applications.

[0003] Specifically, since the fan blades of the desktop range hood are directly exposed to the outside, after long-term use, oil smoke is very likely to adhere to the surface of the fan blades, causing oil and dirt to accumulate on the surface of the fan blades. This not only reduces the efficiency of the range hood's oil smoke extraction, but also increases the cleaning and maintenance burden of the user. The user needs to frequently disassemble and clean the fan blades, which is cumbersome and inconvenient for the user. Summary of the invention

[0004] The object of the present invention is to provide a desktop range hood, in which a wind wheel assembly is hidden in a receiving cavity of a base to avoid direct contact between the wind wheel assembly and oil smoke, thereby achieving an effect of easy cleaning and maintenance.

[0005] In a first aspect, the present invention provides a desktop range hood, comprising: A base having a communicating receiving cavity, an air inlet and an opening; A wind wheel assembly is disposed in the accommodating cavity, and the wind wheel assembly can inhale air through the air inlet hole and output it to the open port; A wind shell is arranged on the opening, and the wind shell is provided with an oil fume passage and an annular air outlet. The oil fume passage runs through the opposite ends of the wind shell, and the annular air outlet connects the opening and the oil fume passage. The annular air outlet can output the air of the opening toward the exhaust end of the oil fume passage, so that the suction end of the oil fume passage generates negative pressure to absorb the oil fume and flow it to the exhaust end.

[0006] The tabletop hood provided by the present invention hides the wind wheel assembly in the receiving cavity of the base to avoid direct contact with oil smoke, reduce oil and dirt accumulation, extend service life, and reduce the difficulty of cleaning and maintenance; the annular air outlet of the wind housing can output air toward the exhaust end of the oil smoke channel, generate negative pressure to absorb oil smoke, improve the efficiency of oil smoke extraction, and help ensure the clean air at the dining table; the oil smoke channel of the wind housing runs through both ends of the wind housing, with a simple structure and easy cleaning, avoiding oil smoke accumulation, reducing odor generation, and improving user experience. The filter is located at the exhaust end of the wind housing, which can effectively filter particulate matter in the oil smoke, improve the purification effect of the exhaust end of the wind housing, and is easy to replace and clean.

[0007] Further, the wind shell includes a first inner shell and a second inner shell, the first inner shell and the second inner shell are connected to form the oil fume passage; the outer diameter of the first inner shell is smaller than the inner diameter of the second inner shell, the first inner shell extends into the second inner shell, and the gap between the part of the first inner shell extending into the second inner shell and the second inner shell forms the annular air outlet; and / or the annular air outlet is provided at one end of the second inner shell away from the first inner shell.

[0008] With the above technical solution, the air shell is composed of a first inner shell and a second inner shell, and the outer diameter of the first inner shell is smaller than the inner diameter of the second inner shell, so that the first inner shell can be accommodated in the second inner shell. The annular air outlet is arranged between the gap formed by the first inner shell and the second inner shell, and / or at the end of the second inner shell. This double-layer inner shell structure, by limiting the position of the annular air outlet, makes the airflow direction output from the annular air outlet more concentrated and can generate a larger airflow, thereby generating a stronger negative pressure at the exhaust end of the oil fume channel, thereby improving the oil fume absorption efficiency.

[0009] Furthermore, an inner diameter of an end of the second inner shell away from the first inner shell is gradually increased from close to the first inner shell to away from the first inner shell.

[0010] By adopting the above technical solution, the structure of the second inner shell away from the first inner shell and the structure of the annular air outlet are improved, aiming to guide the airflow more effectively and enhance the fume extraction effect. Specifically, the inner diameter of the second inner shell away from the first inner shell is designed to increase, which means that the airflow channel gradually expands at this point, which is conducive to the diffusion and uniform distribution of the airflow.

[0011] Furthermore, at least two of the annular air outlets are provided at one end of the second inner shell away from the first inner shell; a plurality of air guide grooves are also provided at one end of the second inner shell away from the first inner shell, and the plurality of air guide grooves are circumferentially spaced between two adjacent annular air outlets.

[0012] By adopting the above technical solution, a plurality of air guide grooves are added to the end of the second inner shell away from the first inner shell, and these air guide grooves are circumferentially spaced between two adjacent annular air outlets. The function of the air guide grooves is to guide and constrain the airflow discharged from the annular air outlet, so that the airflow that may originally diffuse or turbulent can be more concentratedly diffused at the exhaust end of the oil fume channel. By setting the air guide grooves, the flow field of the airflow discharged from the annular air outlet can be optimized, and the airflow turbulence can be reduced, thereby more effectively generating negative pressure at the exhaust end of the oil fume channel and improving the oil fume suction efficiency. The air guide grooves are like tiny nozzles, which perform secondary diffusion of the airflow discharged from the annular air outlet, thereby improving the oil fume purification performance of the entire desktop hood.

[0013] Furthermore, a first spherical bottom shell is provided on the side of the wind shell facing the base, a second spherical bottom shell is provided in the opening, a first rotating shaft and one of a support seat are provided in the spherical bottom shell, the other of the first rotating shaft and the support seat is provided in the second spherical bottom shell, a first rotating hole is provided on the support seat, the first rotating shaft is rotatably connected to the first rotating hole, so that a sliding sealing connection structure is formed between the first spherical bottom shell and the second spherical bottom shell.

[0014] The above technical solution is implemented by setting a first spherical bottom shell and a second spherical bottom shell. The first spherical bottom shell is set on the side of the wind shell facing the base, and the second spherical bottom shell is set in the opening of the base. The two spherical bottom shells can be inserted into each other and closed to form a structure similar to a ball joint, allowing the wind shell to be adjusted to a certain angle relative to the base. In addition, the first spherical bottom shell and the second spherical bottom shell can be tightly fitted no matter what angle they are rotated to, thereby maintaining the sealing between the wind shell and the base, reducing airflow loss, and improving the efficiency of oil fume suction.

[0015] Furthermore, it also includes a rotating seat and a rotating assembly, wherein the rotating seat is arranged at one end of the base away from the wind shell, and the rotating assembly is arranged between the rotating seat and the base, and the rotating assembly can drive the base to rotate relative to the rotating seat.

[0016] By adopting the above technical solution, a rotating seat and a rotating assembly are added so that the base of the range hood can rotate relative to the rotating seat, and the range hood can reciprocate in the horizontal direction, thereby increasing the fume suction range of the range hood to effectively capture fume from different sources or locations, thereby improving user convenience and improving fume extraction efficiency.

[0017] Further, the rotating assembly includes a driving motor, a first transmission gear and a second transmission gear, the driving motor is arranged on the base, the first transmission gear is arranged at the output end of the driving motor, the second transmission gear is fixedly arranged on the rotating seat, the second transmission gear is provided with a second rotating hole and one of the second rotating shafts, the base is provided with a second rotating hole and the other of the second rotating shaft at one end facing the rotating seat, the second rotating hole can be rotatably arranged on the second rotating shaft, and the second transmission gear is meshed with the first transmission gear.

[0018] With the above technical solution, when the driving motor is working, the first transmission gear drives the second transmission gear to rotate, and since the second transmission gear is fixed on the rotating seat and is rotatably connected to the base, the base is driven to rotate relative to the rotating seat. This gear transmission structure can provide a stable and efficient rotation effect, ensuring that the base can reliably reciprocate relative to the rotating seat.

[0019] Furthermore, the second transmission gear includes an integrally formed gear portion and a smooth portion, the gear portion is meshed with the first transmission gear, the smooth portion is provided with a reciprocating stopper facing away from the second rotating hole, and the rotating seat is also provided with a first limit block and a second limit block, the first limit block and the second limit block are arranged on opposite sides of the reciprocating stopper to limit the gear portion from rotating to disengage from the first transmission gear.

[0020] By adopting the above technical solution, the second transmission gear is designed to be an integrally formed gear portion and a smooth portion. The gear portion is responsible for meshing with the first transmission gear to transmit power, and the smooth portion is used to install a reciprocating block. The reciprocating block cooperates with the first limit block and the second limit block set on the rotating seat to jointly limit the rotation range of the gear portion to prevent the gear portion from excessively rotating and disengaging from the first transmission gear. When the second transmission gear rotates to a certain angle, the reciprocating block will approach or contact the limit block, thereby limiting the reciprocating block from always rotating back and forth between the first limit block and the second limit block. In this way, the exhaust end of the oil fume duct is conveniently aligned with the place where the oil fume is generated, and the exhaust end of the oil fume duct is away from the diners.

[0021] Furthermore, it also includes an oil collecting box, the air suction end of the wind shell is provided with an oil collecting port, the base is provided with an oil collecting cavity, the oil collecting port and the oil collecting cavity are connected through an oil pipe, and the oil collecting box is detachably arranged in the oil collecting cavity.

[0022] By adopting the above technical solution, the grease in the oil smoke is collected through the oil collecting box, which prevents the grease from accumulating inside the range hood, reducing the difficulty of cleaning and the frequency of maintenance.

[0023] Furthermore, it also includes a filter, which is arranged on the air suction end of the wind housing. The air suction end of the wind housing is provided with a semiconductor cooling plate around the oil fume channel, and the semiconductor cooling plate is arranged between the filter and the wind housing.

[0024] By adopting the above technical solution, the semiconductor refrigeration plate is arranged between the filter and the air casing, which can effectively reduce the temperature of the filter, thereby accelerating the condensation of oil smoke on the filter, improving the purification and filtration effect of the filter, and ensuring the efficient operation of the range hood.

[0025] As can be seen from the above, the desktop hood provided by the present invention avoids direct contact with oil smoke by hiding the wind wheel assembly in the receiving cavity of the base, reduces oil and dirt accumulation, prolongs the service life, and reduces the difficulty of cleaning and maintenance; the annular air outlet of the wind housing can output air toward the exhaust end of the oil smoke channel, generate negative pressure to absorb oil smoke, improve the efficiency of oil smoke extraction, and help ensure the clean air at the dining table; the oil smoke channel of the wind housing runs through both ends of it, with a simple structure and easy to clean, avoiding oil smoke accumulation, reducing odor generation, and improving user experience. The filter is located at the exhaust end of the wind housing, which can effectively filter particulate matter in the oil smoke, improve the purification effect of the exhaust end of the wind housing, and is easy to replace and clean.

[0026] Other features and advantages of the present application will be described in the following description, and partly become apparent from the description, or be understood by practicing the embodiments of the present application. The purpose and other advantages of the present application can be realized and obtained by the structures specifically pointed out in the written description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 The present invention is a schematic structural diagram of a desktop range hood.

[0028] Figure 2 The figure is a schematic cross-sectional structure diagram of a desktop range hood proposed by the present invention.

[0029] Figure 3 for Figure 1 Schematic diagram of the exploded structure of the stroke shell and base.

[0030] Figure 4 for Figure 3 Schematic diagram of the exploded structure of the mid-table range hood from another angle.

[0031] Figure 5 for Figure 1 Schematic diagram of the exploded structure of the middle base and rotating base.

[0032] Figure 6 for Figure 5 Schematic diagram of the exploded structure of the mid-table range hood from another angle.

[0033] Figure 7 for Figure 2 Schematic diagram of the enlarged structure of area A of the mid-table range hood.

[0034] In the attached drawings: 100, base; 110, receiving cavity; 120, air inlet; 130, open; 140, second spherical bottom shell; 150, oil collecting cavity; 200, wind wheel assembly; 300, wind shell; 301, oil collecting port; 310, oil fume channel; 320, annular air outlet; 330, first inner shell; 340, second inner shell; 350, air guide groove; 360, first spherical bottom shell; 370, first rotating shaft; 380, support Seat; 390, first rotating hole; 400, filter; 500, rotating seat; 510, first limit block; 520, second limit block; 600, rotating assembly; 610, driving motor; 620, first transmission gear; 630, second transmission gear; 631, gear part; 632, smooth part; 640, second rotating hole; 650, second rotating shaft; 660, reciprocating block; 700, oil collecting box; 800, semiconductor cooling plate. DETAILED DESCRIPTION

[0035] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0036] The disclosure below provides many different embodiments or examples to implement different structures of the present invention. In order to simplify the disclosure of the present invention, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present invention. In addition, the present invention can repeat reference numbers and / or reference letters in different examples, and this repetition is for the purpose of simplification and clarity, which itself does not indicate the relationship between the various embodiments and / or settings discussed.

[0037] The desktop range hood disclosed in the present invention is mainly used in dining scenarios such as hot pot and barbecue to purify the oil fume on the table. The desktop range hood hides the wind wheel assembly in the receiving cavity of the base to avoid direct contact between the wind wheel assembly and the oil fume, thereby achieving the effect of easy cleaning and maintenance.

[0038] Reference Figure 1 , Attachment Figure 2In one embodiment, the desktop hood includes a base 100, a wind wheel assembly 200, a wind housing 300 and a filter 400. The base 100 is provided with a accommodating cavity 110, an air inlet 120 and an opening 130 which are connected to each other; the wind wheel assembly 200 is arranged in the accommodating cavity 110, and the wind wheel assembly 200 can inhale air through the air inlet 120 and output it to the opening 130; the wind housing 300 is arranged on the opening 130, and the wind housing 300 is provided with an oil smoke passage 310 and an annular air outlet 320, the oil smoke passage 310 runs through the opposite ends of the wind housing 300, and the annular air outlet 320 connects the opening 130 and the oil smoke passage 310, and the annular air outlet 320 can output the air of the opening 130 toward the exhaust end of the oil smoke passage 310, so that the suction end of the oil smoke passage 310 generates negative pressure to absorb the oil smoke and flow to the exhaust end.

[0039] Specifically, the base 100 is set as a supporting structure of the tabletop range hood, the accommodating cavity 110 is set as a space for accommodating the wind wheel assembly 200, the air inlet 120 is set as an inlet for air to enter the tabletop range hood, the opening 130 is set as an outlet for air to be discharged from the base 100, and the opening 130 also serves as a base for installing the wind housing 300. The wind wheel assembly 200 is installed in the accommodating cavity 110, so that the airflow generated by the wind wheel assembly 200 can enter from the air inlet 120 and be discharged from the opening 130. The wind housing 300 is installed on the opening 130 of the base 100, so that the opening 130 is closed. The wind housing 300 is provided with an oil fume channel 310 that runs through both ends of the wind housing 300 to guide the passage of oil fume. The annular air outlet 320 is provided on the wind housing 300 and communicates with the opening 130 of the base 100, so that the airflow discharged from the wind wheel assembly 200 can enter the wind housing 300 through the annular air outlet 320. The annular air outlet 320 faces the exhaust end of the oil fume channel 310, and the airflow is ejected toward the exhaust end of the oil fume channel 310, and a negative pressure is generated at the exhaust end of the oil fume channel 310 by using the high-speed airflow, so that the oil fume can be sucked into the oil fume channel 310. The filter 400 is installed at the exhaust end of the air housing 300 to perform preliminary filtering on the inhaled oil fume. Through the cooperation of the above structural components, the oil fume suction function of the desktop hood is realized.

[0040] It is worth noting that the shape of the wind housing 300 can be set to be cylindrical or funnel-shaped. When the wind housing 300 is funnel-shaped, the end of the oil fume channel 310 with a larger opening can be selected as the suction end or the exhaust end as needed (for example, when the product needs to ensure that the wind force for smoke extraction is strong, the end of the oil fume channel 310 with a larger opening can be selected as the exhaust end; when the product needs to extract oil fumes over a large range, the end of the oil fume channel 310 with a larger opening can be selected as the suction end).

[0041] As can be seen from the above, the desktop hood provided by the present invention avoids direct contact with oil smoke by hiding the wind wheel assembly 200 in the receiving cavity 110 of the base 100, reduces oil and dirt accumulation, prolongs the service life, and reduces the difficulty of cleaning and maintenance; the annular air outlet 320 of the wind housing 300 can output air toward the exhaust end of the oil smoke channel 310, generates negative pressure to absorb oil smoke, improves the efficiency of oil smoke extraction, and helps to ensure the clean air at the dining table; the oil smoke channel 310 of the wind housing 300 runs through both ends of it, has a simple structure and is easy to clean, avoids oil smoke accumulation, reduces odor generation, and improves user experience. The filter 400 is located at the exhaust end of the wind housing 300, which can effectively filter particulate matter in the oil smoke, improve the purification effect of the exhaust end of the wind housing 300, and is easy to replace and clean.

[0042] In one embodiment, the air shell 300 includes a first inner shell 330 and a second inner shell 340, and the first inner shell 330 and the second inner shell 340 are connected to form an oil fume passage 310; the outer diameter of the first inner shell 330 is smaller than the inner diameter of the second inner shell 340, and the first inner shell 330 extends into the second inner shell 340, and the gap between the part of the first inner shell 330 extending into the second inner shell 340 and the second inner shell 340 forms an annular air outlet 320; and / or, an annular air outlet 320 is provided at one end of the second inner shell 340 away from the first inner shell 330.

[0043] With the above technical solution, the air housing 300 is composed of a first inner housing 330 and a second inner housing 340, and the outer diameter of the first inner housing 330 is smaller than the inner diameter of the second inner housing 340, so that the first inner housing 330 can be accommodated in the second inner housing 340. The annular air outlet 320 is arranged between the gap formed by the first inner housing 330 and the second inner housing 340, and / or is arranged at the end of the second inner housing 340. This double-layer inner housing structure, by limiting the position of the annular air outlet 320, makes the airflow direction output from the annular air outlet 320 more concentrated and can generate a larger airflow, thereby generating a stronger negative pressure at the exhaust end of the oil fume channel 310, and improving the oil fume absorption efficiency.

[0044] In one embodiment, the inner diameter of the end of the second inner shell 340 away from the first inner shell 330 is gradually increased from close to the first inner shell 330 to away from the first inner shell 330 .

[0045] Specifically, one end of the second inner shell 340 away from the first inner shell 330 is designed to be a trumpet-shaped structure, and the inner diameter of the trumpet-shaped structure gradually increases from a position close to the oil fume channel 310 toward a position away from the oil fume channel 310, thereby forming a gradually expanding airflow channel; a plurality of annular air outlets 320 are arranged along the axial direction of the oil fume channel 310, and a multi-layer air outlet structure is formed at the end of the second inner shell 340; the plurality of annular air outlets 320 are centered on the central axis of the oil fume channel 310, and the central axis of the annular air outlet 320 coincides with the central axis of the oil fume channel 310; the outer diameter of the plurality of annular air outlets 320 gradually increases from a position close to the oil fume channel 310 toward a position away from the oil fume channel 310, and the annular air outlet 320 with a smaller outer diameter is arranged at a position close to the oil fume channel 310, and the annular air outlet 320 with a larger outer diameter is arranged at a position away from the oil fume channel 310.

[0046] By adopting the above technical solution, the structure of the end of the second inner shell 340 away from the first inner shell 330 and the structure of the annular air outlet 320 are improved, aiming to more effectively guide the airflow and enhance the fume extraction effect. Specifically, the inner diameter of the end of the second inner shell 340 away from the first inner shell 330 is designed to increase progressively, which means that the airflow channel gradually expands at this location, which is conducive to the diffusion and uniform distribution of the airflow.

[0047] In one embodiment, at least two annular air outlets 320 are provided at one end of the second inner shell 340 away from the first inner shell 330; a plurality of air guide grooves 350 are also provided at one end of the second inner shell 340 away from the first inner shell 330, and the plurality of air guide grooves 350 are circumferentially spaced between two adjacent annular air outlets 320.

[0048] By adopting the above technical solution, a plurality of air guide grooves 350 are added to the end of the second inner shell 340 away from the first inner shell 330, and these air guide grooves 350 are arranged circumferentially between two adjacent annular air outlets 320. The function of the air guide grooves 350 is to guide and constrain the airflow discharged from the annular air outlet 320, so that the airflow that may originally diffuse or turbulent can be more concentratedly diffused at the exhaust end of the oil fume channel 310. By setting the air guide grooves 350, the flow field of the airflow discharged from the annular air outlet 320 can be optimized, and the airflow turbulence can be reduced, thereby more effectively generating negative pressure at the exhaust end of the oil fume channel 310 and improving the oil fume suction efficiency. The air guide grooves 350 are like tiny nozzles, which perform secondary diffusion of the airflow discharged from the annular air outlet 320, thereby improving the oil fume purification performance of the entire desktop range hood.

[0049] In conventional desktop hoods, in order to facilitate users to adjust the angle of fume extraction according to different scenarios, a pitch-adjustable rotating structure is usually provided between the wind housing 300 and the base 100. However, the conventional rotating structure cannot meet the sealing requirements between the wind housing 300 and the base 100, because in the present application, it is necessary to ensure that the air drawn from the outside of the base 100 by the wind wheel assembly 200 can be output to the fume passage 310 as much as possible, and it is necessary to ensure the sealing between the wind housing 300 and the base 100 to avoid affecting the wind force of the desktop hood to extract fume.

[0050] For this purpose, refer to the attached Figure 3 , Attachment Figure 4 In one embodiment, a first spherical bottom shell 360 is provided on the side of the wind shell 300 facing the base 100, a second spherical bottom shell 140 is provided in the opening 130, a first rotating shaft 370 and a support seat 380 are provided in the spherical bottom shell, the other of the first rotating shaft 370 and the support seat 380 is provided in the second spherical bottom shell 140, a first rotating hole 390 is provided on the support seat 380, and the first rotating shaft 370 is rotatably connected to the first rotating hole 390 to form a sliding sealing connection structure between the first spherical bottom shell 360 and the second spherical bottom shell 140.

[0051] The above technical solution is implemented by setting a first spherical bottom shell 360 and a second spherical bottom shell 140. The first spherical bottom shell 360 is set on the side of the wind shell 300 facing the base 100, and the second spherical bottom shell 140 is set in the opening 130 of the base 100. The two spherical bottom shells can be inserted into each other and closed to form a structure similar to a ball joint, allowing the wind shell 300 to be adjusted to a certain angle relative to the base 100. In addition, the first spherical bottom shell 360 and the second spherical bottom shell 140 can be tightly fitted no matter what angle they are rotated to, thereby maintaining the sealing between the wind shell 300 and the base 100, reducing airflow loss, and improving the efficiency of oil fume suction.

[0052] Reference Figure 2 , Attachment Figure 5 , Attachment Figure 6 In one embodiment, it also includes a rotating seat 500 and a rotating assembly 600. The rotating seat 500 is arranged at one end of the base 100 away from the wind shell 300, and the rotating assembly 600 is arranged between the rotating seat 500 and the base 100. The rotating assembly 600 can drive the base 100 to rotate relative to the rotating seat 500.

[0053] By adopting the above technical solution, adding a rotating seat 500 and a rotating assembly 600, the base 100 of the range hood can rotate relative to the rotating seat 500, and the range hood can reciprocate in the horizontal direction, thereby increasing the oil fume suction range of the range hood to effectively capture oil fume from different sources or locations, thereby improving user convenience and improving the oil fume suction efficiency.

[0054] In one embodiment, the rotating assembly 600 includes a driving motor 610, a first transmission gear 620 and a second transmission gear 630. The driving motor 610 is disposed on the base 100, the first transmission gear 620 is disposed at the output end of the driving motor 610, the second transmission gear 630 is fixedly disposed on the rotating seat 500, and the second transmission gear 630 is provided with a second rotating hole 640 and one of the second rotating shafts 650. The base 100 is provided with the other of the second rotating hole 640 and the second rotating shaft 650 at one end facing the rotating seat 500. The second rotating hole 640 can be rotatably disposed on the second rotating shaft 650, and the second transmission gear 630 is meshed with the first transmission gear 620.

[0055] With the above technical solution, when the driving motor 610 is working, the first transmission gear 620 drives the second transmission gear 630 to rotate, and since the second transmission gear 630 is fixed on the rotating seat 500 and is rotatably connected to the base 100, the base 100 is driven to rotate relative to the rotating seat 500. This gear transmission structure can provide a stable and efficient rotation effect, ensuring that the base 100 can reliably reciprocate relative to the rotating seat 500.

[0056] During actual use, the desktop hood needs to ensure as much as possible that the suction end of the oil fume duct 310 is facing the place where the oil fume is generated, and the exhaust end of the oil fume duct 310 is away from the diners. Therefore, the desktop hood does not need to rotate 360 ​​degrees to extract the oil fume, but only needs to rotate a certain angle.

[0057] To this end, in one embodiment, the second transmission gear 630 includes an integrally formed gear portion 631 and a smooth portion 632, the gear portion 631 is meshed with the first transmission gear 620, the smooth portion 632 is provided with a reciprocating stopper 660 facing away from the second rotating hole 640, and the rotating seat 500 is also provided with a first limit block 510 and a second limit block 520, the first limit block 510 and the second limit block 520 are arranged on opposite sides of the reciprocating stopper 660 to limit the gear portion 631 from rotating to disengage from the first transmission gear 620.

[0058] By adopting the above technical solution, the second transmission gear 630 is designed to be an integrally formed gear portion 631 and a smooth portion 632. The gear portion 631 is responsible for meshing with the first transmission gear 620 to transmit power, and the smooth portion 632 is used to install the reciprocating block 660. The reciprocating block 660 cooperates with the first limit block 510 and the second limit block 520 set on the rotating seat 500 to jointly limit the rotation range of the gear portion 631 to prevent the gear portion 631 from rotating excessively and disengaging from the meshing with the first transmission gear 620. When the second transmission gear 630 rotates to a certain angle, the reciprocating block 660 will approach or contact the limit block, thereby limiting the reciprocating block 660 from always reciprocating between the first limit block 510 and the second limit block 520. In this way, it is convenient for the exhaust end of the oil fume duct 310 to be aligned with the oil fume generating area, and the exhaust end of the oil fume duct 310 to be away from the diners.

[0059] Reference Figure 2 , Attachment Figure 5 In one embodiment, an oil collecting box 700 is further included. An oil collecting port 301 is provided on the air suction end of the wind housing 300, and an oil collecting cavity 150 is provided on the base 100. The oil collecting port 301 and the oil collecting cavity 150 are connected through an oil pipe, and the oil collecting box 700 is detachably arranged in the oil collecting cavity 150.

[0060] By adopting the above technical solution, the grease in the oil smoke is collected by the oil collecting box 700, so as to avoid the accumulation of grease inside the range hood, and reduce the cleaning difficulty and maintenance frequency.

[0061] Reference Figure 7 In one embodiment, a filter screen 400 is further included. The filter screen 400 is arranged on the exhaust end of the air housing 300. A semiconductor cooling sheet 800 is arranged around the oil fume passage 310 at the exhaust end of the air housing 300. The semiconductor cooling sheet 800 is arranged between the filter screen 400 and the air housing 300.

[0062] By adopting the above technical solution, the semiconductor refrigeration plate 800 is arranged between the filter 400 and the air housing 300, which can effectively reduce the temperature of the filter 400, thereby accelerating the condensation of oil smoke on the filter 400, improving the purification and filtering effect of the filter 400, and ensuring the efficient operation of the range hood.

[0063] In the description of this specification, the description with reference to the terms "one embodiment", "certain embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0064] The above are only some embodiments of the present invention. For those skilled in the art, several modifications and improvements can be made without departing from the creative concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A desktop range hood, characterized in that: include: The base (100) is provided with a accommodating cavity (110), an air inlet (120), and an opening (130) which are connected to each other; A wind wheel assembly (200) is disposed in the accommodating cavity (110), and the wind wheel assembly (200) is capable of sucking in air through the air inlet hole (120) and outputting the air to the opening (130); The wind housing (300) is arranged on the opening (130), and the wind housing (300) is provided with an oil fume passage (310) and an annular air outlet (320). The oil fume passage (310) runs through two opposite ends of the wind housing (300), and the annular air outlet (320) connects the opening (130) and the oil fume passage (310). The annular air outlet (320) can output air from the opening (130) toward an exhaust end of the oil fume passage (310), so that a negative pressure is generated at the exhaust end of the oil fume passage (310) to absorb the oil fume and flow it to the exhaust end.

2. A desktop range hood according to claim 1, characterized in that: The wind shell (300) comprises a first inner shell (330) and a second inner shell (340), the first inner shell (330) and the second inner shell (340) being connected to form the oil fume passage (310); the outer diameter of the first inner shell (330) is smaller than the inner diameter of the second inner shell (340), the first inner shell (330) extends into the second inner shell (340), and the gap between the portion of the first inner shell (330) extending into the second inner shell (340) and the second inner shell (340) forms the annular air outlet (320); and / or the annular air outlet (320) is provided at one end of the second inner shell (340) away from the first inner shell (330).

3. A desktop range hood according to claim 2, characterized in that: The inner diameter of an end of the second inner shell (340) away from the first inner shell (330) is arranged to increase gradually from close to the first inner shell (330) to away from the first inner shell (330).

4. A desktop range hood according to claim 3, characterized in that: At least two of the annular air outlets (320) are arranged at one end of the second inner shell (340) away from the first inner shell (330); a plurality of air guide grooves (350) are also arranged at one end of the second inner shell (340) away from the first inner shell (330), and the plurality of air guide grooves (350) are arranged circumferentially at intervals between two adjacent annular air outlets (320).

5. The desktop range hood according to claim 1, characterized in that: A first spherical bottom shell (360) is provided on a side of the wind shell (300) facing the base (100), and a second spherical bottom shell (140) is provided in the opening (130); a first rotating shaft (370) and a supporting seat (380) are provided in the first spherical bottom shell (360), and the other of the first rotating shaft (370) and the supporting seat (380) is provided in the second spherical bottom shell (140); a first rotating hole (390) is provided on the supporting seat (380), and the first rotating shaft (370) is rotatably connected to the first rotating hole (390) so that a sliding sealing connection structure is formed between the first spherical bottom shell (360) and the second spherical bottom shell (140).

6. The desktop range hood according to claim 1, characterized in that: It also includes a rotating seat (500) and a rotating assembly (600), wherein the rotating seat (500) is arranged at one end of the base (100) away from the wind housing (300), and the rotating assembly (600) is arranged between the rotating seat (500) and the base (100), and the rotating assembly (600) can drive the base (100) to rotate relative to the rotating seat (500).

7. The desktop range hood according to claim 6, characterized in that: The rotating assembly (600) comprises a driving motor (610), a first transmission gear (620) and a second transmission gear (630); the driving motor (610) is arranged on the base (100); the first transmission gear (620) is arranged at the output end of the driving motor (610); the second transmission gear (630) is fixedly arranged on the rotating seat (500); the second transmission gear (630) is provided with one of a second rotating hole (640) and a second rotating shaft (650); the other of the second rotating hole (640) and the second rotating shaft (650) is provided at one end of the base (100) facing the rotating seat (500); the second rotating hole (640) is rotatably arranged on the second rotating shaft (650), and the second transmission gear (630) is meshed with the first transmission gear (620).

8. The desktop range hood according to claim 7, characterized in that: The second transmission gear (630) comprises an integrally formed gear portion (631) and a smooth portion (632); the gear portion (631) meshes with the first transmission gear (620); the smooth portion (632) is provided with a reciprocating stopper (660) facing away from the second rotating hole (640); the rotating seat (500) is also provided with a first limit block (510) and a second limit block (520); the first limit block (510) and the second limit block (520) are arranged on opposite sides of the reciprocating stopper (660) to limit the gear portion (631) from rotating to disengage from the first transmission gear (620).

9. The desktop range hood according to claim 1, characterized in that: It also comprises an oil collecting box (700), the air extraction end of the wind housing (300) is provided with an oil collecting port (301), the base (100) is provided with an oil collecting cavity (150), the oil collecting port (301) and the oil collecting cavity (150) are connected via an oil pipe, and the oil collecting box (700) is detachably arranged in the oil collecting cavity (150).

10. The desktop range hood according to claim 1, characterized in that: It also comprises a filter screen (400), the filter screen (400) being arranged on the air extraction end of the wind housing (300), the air extraction end of the wind housing (300) being provided with a semiconductor cooling sheet (800) surrounding the oil fume passage (310), the semiconductor cooling sheet (800) being arranged between the filter screen (400) and the wind housing (300).

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