Tabletop smoke machine

CN224837522UActive Publication Date: 2026-10-09HANGZHOU ROBAM APPLIANCES CO LTD
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Patent Information

Application Number
CN202522319416.6
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-10-31
Publication Date
2026-10-09
Estimated Expiration
2035-10-31

AI Technical Summary

Technical Problem

然而,该技术仍存在显著局限性:一方面,侧吸拢烟腔产生的负压区域覆盖范围有限,仅能有效吸吸风口附近油烟,对于远离吸风口区域的油烟捕捉能力不足;另一方面,拢烟板末端因壁面射流衰减效应,附壁气流速度随距离增加而减弱,导致康达效应显著退化,难以维持对逃逸油烟的持续捕集

Benefits of technology

[0021]该台式烟机包括主壳体和拢烟板,主壳体设置有第一负压腔,主壳体的侧板设置有连通第一负压腔的第一吸烟口;拢烟板与侧板枢接,拢烟板被配置为相对侧板在任意角度悬停,拢烟板设置有第二负压腔,拢烟板靠近第一吸烟口的一侧设置有连通第二负压腔的第二吸烟口,第二负压腔内能够产生负压。该台式烟机工作时,将台式烟机放置于烹饪设备旁,第一负压腔和第二负压腔都能产生负压,进而使得第一吸烟口附近的区域和第二吸烟口附近的区域均能够形成负压区域,以增大负压区域的体积,进而有利于吸收烹饪设备产生的油烟,提升对油烟的捕捉能力。同时,拢烟板上设置有第二吸烟口,进而改善了拢烟板末端的壁面射流衰减效应,有效的改善了拢烟板上油烟的逃逸。

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Abstract

The utility model relates to kitchen electrical appliances technical field, specifically disclose table type smoke machine, the table type smoke machine includes main casing and gathers smoke board, and the main casing is provided with first negative pressure cavity, and the lateral plate of main casing is provided with the first smoke suction mouth of intercommunication first negative pressure cavity, gathers the smoke board with lateral plate pivot joint, and the smoke board is configured to hover at any angle relative to lateral plate, and the smoke board is provided with second negative pressure cavity, and the side of the smoke board close to first smoke suction mouth is provided with the second smoke suction mouth of intercommunication second negative pressure cavity, and the second negative pressure cavity can produce negative pressure. Place table type smoke machine in cooking equipment, and first negative pressure cavity and second negative pressure cavity can produce negative pressure, and then make the area near first smoke suction mouth and the area near second smoke suction mouth can form negative pressure area, increase the volume of negative pressure area, improve the capture ability to oil fume. At the same time, the second smoke suction mouth is arranged on the smoke board, the wall surface jet decay problem of the end of the smoke board is improved, and the problem that the oil fume escapes on the smoke board is improved.
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Description

Technical Field

[0001] This utility model relates to the field of kitchen appliance technology, and in particular to a countertop range hood. Background Technology

[0002] In the catering environment, tabletop range hoods are the core equipment for ensuring the air quality of the restaurant, and their smoke extraction performance directly affects the control of oil fumes during the cooking process.

[0003] Currently, most mainstream products on the market adopt a design that combines side-suction fume extraction technology with a fume collection plate structure. This design captures cooking fumes through a negative pressure zone created by the air intake, and utilizes the wall-attached airflow at the edge of the fume collection plate to enhance the directional collection of fumes (based on the Coanda effect). However, this technology still has significant limitations: Firstly, the negative pressure zone generated by the side-suction fume collection chamber has a limited coverage area, effectively only capturing fumes near the air intake, and lacking sufficient ability to capture fumes far from the air intake. Secondly, due to the wall jet attenuation effect at the end of the fume collection plate, the velocity of the wall-attached airflow decreases with increasing distance, leading to a significant degradation of the Coanda effect and making it difficult to maintain continuous capture of escaping fumes. Furthermore, the high-temperature fumes generated during cooking are easily affected by airflow disturbances, further exacerbating the problem of fume diffusion far from the air intake. These shortcomings mean that existing countertop range hoods still experience fume leakage in practical applications, not only worsening restaurant air quality but also potentially negatively impacting customer experience and kitchen hygiene and safety.

[0004] Therefore, there is an urgent need to address the shortcomings of existing technologies and propose a tabletop range hood to solve the above problems. Utility Model Content

[0005] The purpose of this utility model is to provide a tabletop range hood to solve the problem that the negative pressure area generated by the side suction smoke collection chamber has a limited coverage range, which can only effectively suck up the oil fumes near the air inlet and is not able to capture oil fumes far away from the air inlet; due to the wall jet attenuation effect at the end of the smoke collection plate, the velocity of the airflow attached to the wall decreases with the increase of distance, making it difficult to maintain the continuous capture of escaped oil fumes.

[0006] This utility model provides a tabletop range hood, which includes:

[0007] The main housing has a first negative pressure chamber, and the side plate of the main housing has a first smoke inlet that communicates with the first negative pressure chamber.

[0008] The smoke-collecting plate is pivotally connected to the side plate. The smoke-collecting plate is configured to hover at any angle relative to the side plate. The smoke-collecting plate is provided with a second negative pressure chamber. A second smoke-collecting port that connects to the second negative pressure chamber is provided on the side of the smoke-collecting plate near the first smoke-collecting port. Negative pressure can be generated in the second negative pressure chamber.

[0009] As a preferred technical solution for tabletop range hoods, the first negative pressure chamber and the second negative pressure chamber are connected.

[0010] As a preferred technical solution for tabletop range hoods, the smoke collection plate includes a plate body and a damping shaft. The damping shaft is used to pivotally connect the plate body and the side plate so that the plate body can be suspended at any angle relative to the side plate. The second negative pressure chamber and the second smoke inlet are both located on the plate body.

[0011] As a preferred technical solution for tabletop range hoods, the smoke collection plate also includes an air duct. One end of the air duct is connected to the second negative pressure chamber, and the other end of the air duct passes through the first smoke inlet and extends into the first negative pressure chamber.

[0012] As a preferred technical solution for tabletop range hoods, the damping shaft includes a first pivot frame, a damping body, and a second pivot frame. The first pivot frame is disposed in the first negative pressure chamber and fixedly connected to the side plate, while the second pivot frame is disposed at the other end of the air passage. The damping body is used to pivotally connect the first pivot frame and the second pivot frame.

[0013] As a preferred technical solution for tabletop range hoods, the smoke collection plate includes a stop position that covers and closes the first smoke inlet;

[0014] An oil cup is installed inside the first negative pressure chamber, and the oil cup is located below the first smoking port;

[0015] The peripheral wall of the first smoke inlet is provided with a first oil leak port that connects to the first negative pressure chamber. The first oil leak port is opposite to the oil cup. The plate is provided with a second oil leak port that connects to the second negative pressure chamber. When the smoke collecting plate is in the stopped position, the first oil leak port and the second oil leak port are opposite to each other.

[0016] As a preferred technical solution for tabletop range hoods, the main housing also includes an oil guide plate, which is located in the first negative pressure chamber and between the oil cup and the first oil drain port. The oil leaking from the first oil drain port flows to the oil cup through the oil guide plate.

[0017] As a preferred technical solution for tabletop range hoods, the smoke collection plate also includes oil-absorbing cotton, and oil-absorbing cotton is installed in the second negative pressure chamber.

[0018] As a preferred technical solution for tabletop range hoods, the smoke collection plate includes a plate body and a damping shaft. The plate body includes a top cover and a bottom plate. The top cover and bottom plate are detachably connected and form a second negative pressure chamber. The damping shaft is used to pivotally connect the bottom plate and the side plate. The second smoke inlet is located on the bottom plate.

[0019] As a preferred technical solution for tabletop range hoods, multiple second smoke inlets are provided, and these multiple second smoke inlets are arranged sequentially at intervals around the axial direction of the base plate.

[0020] The tabletop range hood provided by this utility model has at least the following beneficial effects:

[0021] This countertop range hood includes a main housing and a smoke-collecting plate. The main housing has a first negative pressure chamber, and a side plate of the main housing has a first smoke inlet communicating with the first negative pressure chamber. The smoke-collecting plate is pivotally connected to the side plate and is configured to hover at any angle relative to the side plate. The smoke-collecting plate has a second negative pressure chamber, and a second smoke inlet communicating with the second negative pressure chamber is located on the side of the smoke-collecting plate near the first smoke inlet. Negative pressure can be generated within the second negative pressure chamber. When the countertop range hood is in operation, placing it next to cooking equipment will generate negative pressure in both the first and second negative pressure chambers. This creates negative pressure areas near both the first and second smoke inlets, increasing the volume of these areas and thus facilitating the absorption of cooking fumes and improving the fume capture capability. Simultaneously, the second smoke inlet on the smoke-collecting plate improves the wall jet attenuation effect at the end of the smoke-collecting plate, effectively reducing the escape of fumes from the plate. Attached Figure Description

[0022] Figure 1 This is a cross-sectional view of a tabletop range hood in the prior art (with the smoke collection plate in the working position).

[0023] Figure 2 This is a schematic diagram of the structure of the tabletop range hood in this embodiment of the present invention;

[0024] Figure 3 This is a cross-sectional view of a tabletop range hood in an embodiment of the present invention (with the smoke collection plate in the working position).

[0025] Figure 4 This is a cross-sectional view of a tabletop range hood in an embodiment of the present invention (the smoke collection plate is located in the stopped position).

[0026] Figure 5 This is an exploded schematic diagram of the tabletop range hood in an embodiment of this utility model.

[0027] In the picture:

[0028] 1. Main housing; 11. First negative pressure chamber; 12. Side plate; 121. First smoke inlet; 1211. First oil leakage outlet; 13. Oil guide plate; 14. Air outlet;

[0029] 2. Smoke collecting plate; 21. Plate body; 211. Top cover; 212. Second negative pressure chamber; 213. Bottom plate; 2131. Second smoke inlet; 2132. Female fastener; 214. Second oil leakage port; 22. Damping shaft; 221. First pivot frame; 222. Damping body; 223. Second pivot frame; 23. Air passage; 24. Oil-absorbing cotton;

[0030] 3. Oil cup; 4. First blower; 5. Filter screen. Detailed Implementation

[0031] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0032] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The terms "first position" and "second position" refer to two different positions. Moreover, "above," "on top of," and "over" the first feature in relation to the second feature includes the first feature directly above and diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "under," and "below" the first feature in relation to the second feature includes the first feature directly below and diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0033] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0034] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0035] like Figure 1As shown, existing tabletop range hoods typically include a main housing 1, a smoke collection plate 2, a filter screen 5, and a first fan 4. The main housing 1 is provided with a first negative pressure chamber 11, and the side plate 12 of the main housing 1 is provided with a first smoke inlet 121 communicating with the first negative pressure chamber 11. The top wall of the main housing 1 is provided with an air outlet 14 communicating with the first negative pressure chamber 11. The filter screen 5 and the first fan 4 are respectively located in the first negative pressure chamber 11. When the first fan 4 works, it creates a negative pressure in the first negative pressure chamber 11, thereby drawing in oil fumes through the first smoke inlet 121. After being filtered by the filter screen 5, the oil fumes are discharged from the air outlet 14. The smoke collection plate 2 is pivotally connected to the side plate 12, and the wall-attached airflow at the edge of the smoke collection plate 2 enhances the directional collection of oil fumes. In this process, on the one hand, the negative pressure area generated by the side-suction smoke collection chamber has a limited coverage area, effectively only able to draw in fumes near the air vent, and insufficient for capturing fumes far from the air vent; on the other hand, due to the wall jet attenuation effect at the end of the smoke collection plate 2 (the end far from the main housing 1), the velocity of the airflow attached to the wall decreases with increasing distance, resulting in a significant degradation of the Coanda effect, making it difficult to maintain continuous capture of escaping fumes. Furthermore, the high-temperature fumes generated during cooking are easily affected by airflow disturbances, further exacerbating the problem of fume diffusion far from the air vent. These defects mean that existing countertop range hoods still experience fume leakage in practical applications, not only worsening restaurant air quality but also potentially negatively impacting customer experience and kitchen hygiene and safety.

[0036] To solve the above problems, such as Figures 2 to 5 As shown, this embodiment provides a tabletop range hood, which includes a main housing 1 and a smoke-collecting plate 2. The main housing 1 is provided with a first negative pressure chamber 11, and a side plate 12 of the main housing 1 is provided with a first smoke inlet 121 communicating with the first negative pressure chamber 11. The smoke-collecting plate 2 is pivotally connected to the side plate 12 and is configured to hover at any angle relative to the side plate 12. The smoke-collecting plate 2 is provided with a second negative pressure chamber 212, and a second smoke inlet 2131 communicating with the second negative pressure chamber 212 is provided on the side of the smoke-collecting plate 2 near the first smoke inlet 121. Negative pressure can be generated in the second negative pressure chamber 212. When the tabletop range hood is working, it is placed next to the cooking equipment. Both the first negative pressure chamber 11 and the second negative pressure chamber 212 can generate negative pressure, thereby forming negative pressure areas near the first smoke inlet 121 and the second smoke inlet 2131. This increases the volume of the negative pressure areas, which is beneficial for absorbing the oil fumes generated by the cooking equipment and improving the ability to capture oil fumes. Meanwhile, a second smoke inlet 2131 is provided on the smoke collection plate 2, which improves the wall jet attenuation effect at the end of the smoke collection plate 2 and effectively improves the escape of oil fumes on the smoke collection plate 2.

[0037] Optionally, since the fumes rise, to achieve better smoke collection, the pivot point of the smoke-collecting plate 2 and the side plate 12 is positioned above the first smoke inlet 121. When the smoke-collecting plate 2 and the side plate 12 form an angle, the smoke-collecting plate 2 can prevent the fumes from rising. In other embodiments, the pivot point of the smoke-collecting plate 2 and the side plate 12 can also be positioned below the first smoke inlet 121, or the pivot point of the smoke-collecting plate 2 and the side plate 12 can be positioned on one side of the first smoke inlet 121 along the horizontal direction.

[0038] Optionally, the included angle α between the smoke collecting plate 2 and the side plate 12 is 0° ≤ α ≤ 120°. When the included angle α between the smoke collecting plate 2 and the side plate 12 is 0°, the desktop range hood is in the stopped position, at which time the smoke collecting plate 2 covers and closes the first smoke inlet 121. The included angle α between the smoke collecting plate 2 and the side plate 12 can also be one of 30°, 40°, 50°, 60°, 70°, 80°, 90°, 100°, 110°, and 120°, at which time the desktop range hood is in the working position.

[0039] Optionally, the first negative pressure chamber 11 and the second negative pressure chamber 212 are connected. In this embodiment, since the first negative pressure chamber 11 generates negative pressure under the action of the first fan 4, and since the first negative pressure chamber 11 and the second negative pressure chamber 212 are connected, the gas in the second negative pressure chamber 212 is drawn into the first negative pressure chamber 11, so that the second negative pressure chamber 212 also forms negative pressure.

[0040] Optionally, a second fan can be installed in the second negative pressure chamber 212. The gas in the second negative pressure chamber 212 is drawn into the first negative pressure chamber 11 by the second fan, thereby forming a negative pressure in the second negative pressure chamber 212. In this embodiment, the pressure of the negative pressure in the second negative pressure chamber 212 is greater than the pressure without the second fan.

[0041] In other embodiments, a second fan and an oil suction screen can be installed inside the second negative pressure chamber 212. The second negative pressure chamber 212 is also provided with an exhaust port. Under the action of the second fan, oil fumes are drawn into the second negative pressure chamber 212 through the second smoke inlet 2131, and then discharged from the exhaust port of the second negative pressure chamber 212 after being filtered by the oil suction screen.

[0042] Optionally, the smoke-collecting plate 2 includes a plate body 21 and a damping shaft 22. The damping shaft 22 is used to pivotally connect the plate body 21 and the side plate 12, so that the plate body 21 can be suspended at any angle relative to the side plate 12. The second negative pressure chamber 212 and the second smoke inlet 2131 are both disposed on the plate body 21. In this embodiment, the relative suspension of the plate body 21 and the side plate 12 is achieved by the damping shaft 22. In other embodiments, the plate body 21 and the side plate 12 are pivotally connected by a conventional pivot shaft. The smoke-collecting plate 2 also includes an air support rod, one end of which is pivotally connected to the side plate 12 and the other end of which is pivotally connected to the plate body 21, so that the plate body 21 can be suspended at any angle relative to the side plate 12.

[0043] Optionally, the smoke-collecting plate 2 also includes an air passage 23, one end of which is connected to the second negative pressure chamber 212, and the other end of which passes through the first smoke inlet 121 and extends into the first negative pressure chamber 11. In this embodiment, the air passage 23 is fixedly connected to the plate body 21, and the air passage 23 can be a flexible tube or a rigid tube.

[0044] Optionally, the air passage 23 and the plate 21 are integrally formed.

[0045] Optionally, the damping shaft 22 includes a first pivot frame 221, a damping body 222, and a second pivot frame 223. The first pivot frame 221 is disposed within the first negative pressure chamber 11 and fixedly connected to the side plate 12. The second pivot frame 223 is disposed at the other end of the airway 23. The damping body 222 is used to pivotally connect the first pivot frame 221 and the second pivot frame 223. In this embodiment, two first pivot frames 221 are provided, spaced apart. Two second pivot frames 223 are provided, disposed on both sides of the airway and fixedly connected to the airway. Two damping bodies 222 are provided. The two first pivot frames 221, the two second pivot frames 223, and the two damping bodies 222 are arranged in a one-to-one correspondence. The first shaft of the damping body 222 is fixedly connected to the corresponding first pivot frame 221, and the second shaft of the damping body 222 is fixedly connected to the corresponding second pivot frame 223. There is a damping force between the first shaft and the second shaft. The specific structure of the damper 222 is existing technology and will not be described in detail here.

[0046] Optionally, the smoke collecting plate 2 includes a stop position that covers and closes the first smoke inlet 121; an oil cup 3 is provided in the first negative pressure chamber 11, and the oil cup 3 is located below the first smoke inlet 121; a first oil drain 1211 communicating with the first negative pressure chamber 11 is provided on the peripheral wall of the first smoke inlet 121, and the first oil drain 1211 is opposite to the oil cup 3; the plate body 21 is provided with a second oil drain 214 communicating with the second negative pressure chamber 212; when the smoke collecting plate 2 is in the stop position, the first oil drain 1211 and the second oil drain 214 are opposite to each other. In this embodiment, since the first oil drain 1211 is opposite to the oil cup 3 and the oil cup 3 is located below the first oil suction port, the first oil drain 1211 is located on the bottom peripheral wall of the first smoke inlet 121. When the smoke collecting plate 2 is in the stopped position, the second oil suction port is located at the lowest position of the plate 21. Therefore, the oil adhering to the inner wall of the second negative pressure chamber 212 flows to the position of the second oil drain 214 under the action of gravity. After passing through the second oil drain 214 and the first oil drain 1211, the oil flows to the oil cup 3.

[0047] Optionally, the main housing 1 further includes an oil guide plate 13, which is disposed within the first negative pressure chamber 11 and located between the oil cup 3 and the first oil drain 1211. The oil leaking from the first oil drain 1211 flows through the oil guide plate 13 to the oil cup 3. In this embodiment, the oil guide plate 13 serves to guide the oil, thereby directing the oil leaking from the first oil drain 1211 to the oil cup 3, preventing it from flowing to the bottom wall of the first negative pressure chamber 11.

[0048] Optionally, the smoke collecting plate 2 also includes oil-absorbing cotton 24, which is disposed in the second negative pressure chamber 212. In this embodiment, the oil-absorbing cotton 24 can absorb the oil in the smoke entering the second negative pressure chamber 212, which can reduce the burden of smoke filtration in the first negative pressure chamber 11 on the one hand, and reduce the amount of oil adhering to the first negative pressure chamber 11 flowing to the oil cup 3 on the other hand.

[0049] Optionally, the plate 21 includes a top cover 211 and a bottom plate 213. The top cover 211 and the bottom plate 213 are detachably connected and form a second negative pressure chamber 212. The damping shaft 22 is used to pivotally connect the bottom plate 213 and the side plate 12. The second smoke inlet 2131 is disposed on the bottom plate 213. In this embodiment, the top cover 211 is provided with a plurality of male buckles, which are arranged sequentially and spaced apart around the circumference of the top cover 211. The bottom plate 213 is provided with a plurality of female buckles 2132, which are arranged sequentially and spaced apart around the circumference of the bottom plate 213. The plurality of male buckles and the plurality of female buckles 2132 are engaged one-to-one, thereby realizing the detachable connection between the top cover 211 and the bottom plate 213.

[0050] Optionally, multiple second smoke inlets 2131 are provided, and the multiple second smoke inlets 2131 are arranged sequentially at intervals around the axial direction of the base plate 213. In this embodiment, this arrangement can increase the volume of the formed negative pressure area on the one hand, and enhance the wall adhesion effect at various positions of the smoke collecting plate 2 on the other hand, effectively improving the escape of oil fumes.

[0051] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A tabletop range hood, characterized in that, include: The main housing (1) is provided with a first negative pressure chamber (11), and the side plate (12) of the main housing (1) is provided with a first smoking port (121) that communicates with the first negative pressure chamber (11). A smoke-collecting plate (2) is pivotally connected to the side plate (12). The smoke-collecting plate (2) is configured to hover at any angle relative to the side plate (12). The smoke-collecting plate (2) is provided with a second negative pressure chamber (212). A second smoking port (2131) communicating with the second negative pressure chamber (212) is provided on the side of the smoke-collecting plate (2) near the first smoking port (121). Negative pressure can be generated in the second negative pressure chamber (212).

2. The tabletop range hood according to claim 1, characterized in that, The first negative pressure chamber (11) and the second negative pressure chamber (212) are connected.

3. The tabletop range hood according to claim 2, characterized in that, The smoke-collecting plate (2) includes a plate body (21) and a damping shaft (22). The damping shaft (22) is used to pivotally connect the plate body (21) and the side plate (12) so that the plate body (21) can be suspended at any angle relative to the side plate (12). The second negative pressure chamber (212) and the second smoking port (2131) are both located on the plate body (21).

4. The tabletop range hood according to claim 3, characterized in that, The smoke-collecting plate (2) also includes an air passage (23), one end of which is connected to the second negative pressure chamber (212), and the other end of which passes through the first smoking port (121) and extends into the first negative pressure chamber (11).

5. The tabletop range hood according to claim 4, characterized in that, The damping shaft (22) includes a first pivot frame (221), a damping body (222), and a second pivot frame (223). The first pivot frame (221) is disposed in the first negative pressure chamber (11) and fixedly connected to the side plate (12). The second pivot frame (223) is disposed at the other end of the air passage (23). The damping body (222) is used to pivot the first pivot frame (221) and the second pivot frame (223).

6. The tabletop range hood according to claim 3, characterized in that, The smoke collection plate (2) includes a stop position that covers the first smoke inlet (121) and closes the first smoke inlet (121); An oil cup (3) is provided inside the first negative pressure chamber (11), and the oil cup (3) is located below the first smoking port (121); The first smoke inlet (121) has a first oil leak (1211) connected to the first negative pressure chamber (11) on its peripheral wall. The first oil leak (1211) is opposite to the oil cup (3). The plate (21) has a second oil leak (214) connected to the second negative pressure chamber (212). When the smoke collecting plate (2) is in the stop position, the first oil leak (1211) and the second oil leak (214) are opposite to each other.

7. The tabletop range hood according to claim 6, characterized in that, The main housing (1) also includes an oil guide plate (13), which is disposed in the first negative pressure chamber (11) and located between the oil cup (3) and the first oil leak (1211). The oil leaking from the first oil leak (1211) flows to the oil cup (3) through the oil guide plate (13).

8. The tabletop range hood according to any one of claims 1-7, characterized in that, The smoke-collecting plate (2) also includes oil-absorbing cotton (24), and the oil-absorbing cotton (24) is provided in the second negative pressure chamber (212).

9. The tabletop range hood according to claim 8, characterized in that, The smoke-collecting plate (2) includes a plate body (21) and a damping shaft (22). The plate body (21) includes a top cover (211) and a bottom plate (213). The top cover (211) and the bottom plate (213) are detachably connected and form the second negative pressure chamber (212). The damping shaft (22) is used to pivotally connect the bottom plate (213) and the side plate (12). The second smoking port (2131) is disposed on the bottom plate (213).

10. The tabletop range hood according to claim 9, characterized in that, Multiple second smoke inlets (2131) are provided, and the multiple second smoke inlets (2131) are arranged sequentially at intervals around the axial direction of the base plate (213).