Overhead range hood

Abstract

The utility model relates to kitchen appliance technical field discloses a top -mounted type range hood, including casing, centrifugal fan and axial flow fan. The casing has the smoke collecting chamber and with the smoke collecting chamber intercommunication's first air inlet, second air inlet and air outlet, the first air inlet is set up in the front panel of casing to be toward the range, the second air inlet is set up in the bottom of casing and is located below the first air inlet, the air outlet is located above the first air inlet, the centrifugal fan is located in the smoke collecting chamber, and the centrifugal fan is arranged at the air outlet, and the outlet of centrifugal fan is communicated with the outside flue through the air outlet, the axial flow fan is located in the smoke collecting chamber, and the axial flow fan is arranged at the second air inlet through the connecting component, and the connecting component is used for adjusting the position of axial flow fan, so that the included angle of the rotating center of axial flow fan and vertical direction is adjustable. The top -mounted type range hood can overcome the problem of fan suction attenuation, improve the smoke capturing efficiency, and maintain stable smoke exhaust performance.

Description

Technical Field

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

[0002] Top-mounted range hoods, by embedding the fan in the ceiling, aim to free up kitchen space and achieve a minimalist appearance. However, this structure means that the negative pressure area generated by existing top-mounted range hoods, due to the high installation position of the fan, is mainly concentrated near the external flue inlet, making it difficult to effectively cover the smoke diffusion area on the cooktop surface. Smoke tends to spread outwards as it rises, failing to be captured in time. Secondly, the long exhaust duct between the fan and the smoke source increases airflow resistance, significantly reducing the fan's effective suction power during transmission. To achieve the desired extraction effect, a higher-powered fan must be used, easily leading to problems such as high energy consumption, high noise, and strong vibration.

[0003] Long exhaust ducts can cause the temperature of the fumes to drop during transport, leading to condensation and adhesion of oil mist on the duct's inner walls. This not only increases cleaning difficulty but also further reduces the duct's cross-sectional area, increasing airflow resistance and creating a vicious cycle. To address this issue, most existing products still rely on simple speed-up switching, requiring users to manually judge the amount of fumes and select the appropriate fan speed. This delayed operation often results in fumes being forcefully expelled only after they have already diffused. In practice, to ensure effective extraction, the fan needs to operate at high speed continuously, wasting energy. Conversely, low-heat cooking often results in energy consumption due to the fan's continuous high-speed operation, and reducing the speed to save energy may lead to insufficient suction. Furthermore, the position, height, and operation of the cookware frequently change during cooking. A fixed suction direction design is ill-suited to diverse cooking scenarios, and a fixed airflow cannot effectively handle these dynamic changes, easily creating dead zones in airflow coverage and reducing collection efficiency.

[0004] Therefore, there is an urgent need to design a top-mounted range hood to solve the above technical problems. Utility Model Content

[0005] The purpose of this invention is to propose a top-mounted range hood that can overcome the problem of reduced suction power of the fan, improve the efficiency of smoke capture, and maintain stable smoke exhaust performance.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] A top-mounted range hood is provided, comprising:

[0008] The housing has a smoke collection chamber and a first air inlet, a second air inlet and an air outlet communicating with the smoke collection chamber. The first air inlet is opened on the front plate of the housing and faces the stove. The second air inlet is opened at the bottom of the housing and is located below the first air inlet. The air outlet is located above the first air inlet.

[0009] A centrifugal fan is located inside the smoke collection chamber. The centrifugal fan is positioned at the air outlet, and the outlet of the centrifugal fan is connected to an external flue through the air outlet.

[0010] An axial flow fan is located inside the smoke collection chamber. The axial flow fan is mounted at the second air inlet via a connecting assembly. The connecting assembly is used to adjust the position of the axial flow fan so that the angle between the rotation center of the axial flow fan and the vertical direction is adjustable.

[0011] Optionally, the top-mounted range hood also includes a temperature sensor disposed at the second air inlet, and the temperature sensor is signal-connected to both the centrifugal fan and the axial fan.

[0012] Optionally, the top-mounted range hood further includes a flap, which is rotatably mounted at the first air inlet by a drive component, and the temperature sensor is signal-connected to the drive component.

[0013] Optionally, the connecting assembly includes a universal joint and a first drive motor. The universal joint includes a cross universal joint, a first fork-shaped member, and a second fork-shaped member. The first fork-shaped member is disposed on the housing. The two ends of the first shaft of the cross universal joint are rotatably connected to the first fork-shaped member. The two ends of the second shaft of the cross universal joint are rotatably connected to the second fork-shaped member. The axial flow fan is disposed on the second fork-shaped member. The first drive motor drives the first shaft to rotate relative to the first fork-shaped member.

[0014] Optionally, the connecting assembly further includes a second drive motor, which drives the second fork-shaped member to rotate relative to the second shaft.

[0015] Optionally, a filter screen is provided at the second air inlet, and the connecting component is disposed on the filter screen.

[0016] Optionally, the second air inlet is a circular hole, and the outer diameter of the circular hole is not greater than the blade diameter of the axial flow fan.

[0017] Optionally, the second air inlet has multiple spaced-apart inlets, and each second air inlet is provided with one of the axial flow fans.

[0018] Optionally, the lower edge of the first air inlet is spaced from the axial flow fan in the vertical direction.

[0019] Optionally, the housing includes a first housing and a second housing arranged at an angle, the inner cavity of the first housing and the inner cavity of the second housing are connected to form the smoke collection chamber, the first housing is located above the ceiling of the kitchen, the air outlet is disposed on the first housing, the second housing is located below the ceiling of the kitchen, and both the first air inlet and the second air inlet are opened on the second housing.

[0020] The beneficial effects of this utility model include at least the following:

[0021] This utility model provides a top-mounted range hood, including a housing, a centrifugal fan, and an axial fan. The housing has a smoke collection chamber and a first air inlet, a second air inlet, and an air outlet communicating with the smoke collection chamber. The first air inlet is located on the front panel of the housing facing the cooktop, the second air inlet is located at the bottom of the housing below the first air inlet, and the air outlet is located above the first air inlet. The centrifugal fan is located inside the smoke collection chamber and is positioned at the air outlet, with its outlet communicating with the air outlet, which in turn communicates with an external flue. The axial fan is located inside the smoke collection chamber and is positioned at the second air inlet via a connecting assembly. The connecting assembly is used to adjust the position of the axial fan so that the angle between the rotation center of the axial fan and the vertical direction is adjustable. Smoke can enter the smoke collection chamber through the first and second air inlets, and the smoke entering the smoke collection chamber through the second air inlet is accelerated by the axial fan, thereby forming a directional and concentrated airflow that is actively blown upwards. The flue gas drawn in from the first air inlet and the flue gas accelerated upwards from the second air inlet converge in the middle and above of the smoke collection chamber. A centrifugal fan located at the air outlet completely captures these two converging flue gases and applies maximum energy, causing them to be discharged from the centrifugal fan outlet. The flue gas, further kineticly enhanced by the centrifugal fan, overcomes pipe resistance and is discharged at high speed into the external flue through the exhaust pipe, completing the entire suction and exhaust process. An axial flow fan is added at the second air inlet at the bottom of the casing. Utilizing the active air delivery function of the axial flow fan, it effectively overcomes the suction power attenuation problem caused by the installation height of traditional top-mounted range hoods. Simultaneously, the blowing and suction action of the axial flow fan results in a higher flow velocity of the flue gas over long distances in the flue, preventing the flue gas from cooling down during long-term transport and condensing on the inner wall of the exhaust channel, thus avoiding increased airflow resistance. Furthermore, the axial flow fan is positioned at the second air inlet via a connecting assembly. The angle between the fan's rotation center and the vertical direction is adjustable, allowing the airflow direction to be changed. This enables the axial flow fan to more precisely target different smoke sources on the cooktop, achieving directional airflow guidance, improving smoke capture efficiency, and maintaining stable exhaust performance. By placing the axial flow fan at the second air inlet at the bottom of the casing, directional smoke guidance is achieved, allowing the smoke to flow quickly through the exhaust duct, rather than simply increasing the power of a centrifugal fan. This effectively avoids the problems of high energy consumption, high noise, and strong vibration associated with using a more powerful centrifugal fan. Attached Figure Description

[0022] Figure 1 This is a partial structural perspective view of the top-mounted range hood provided in this embodiment of the utility model;

[0023] Figure 2 This is a partial structural schematic diagram of the top-mounted range hood provided in this embodiment of the utility model;

[0024] Figure 3 This is an assembly drawing of the axial flow fan and connecting components provided in this embodiment of the utility model.

[0025] Figure Labels

[0026] 1. Housing; 11. First housing; 12. Second housing; 100. Smoke collection chamber; 101. First air inlet; 102. Second air inlet; 2. Centrifugal fan; 21. Outlet; 3. Axial flow fan; 4. Universal joint; 41. First fork-shaped component; 42. Second fork-shaped component; 43. Universal joint; 431. First shaft; 432. Second shaft; 5. Filter screen; 6. Flip plate; 7. Temperature sensor. Detailed Implementation

[0027] To make the technical problem solved by this utility model, the technical solution adopted, and the technical effect achieved clearer, the technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely for explaining this utility model and not for limiting it. Furthermore, it should be noted that, for ease of description, only the parts related to this utility model are shown in the accompanying drawings, not all of them.

[0028] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between 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.

[0029] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0030] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, 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. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0031] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0032] like Figures 1 to 3 As shown, this embodiment provides a top-mounted range hood, including a housing 1, a centrifugal fan 2, and an axial fan 3. The housing 1 has a smoke collection chamber 100 and a first air inlet 101, a second air inlet 102, and an air outlet communicating with the smoke collection chamber 100. The first air inlet 101 is located on the front panel of the housing 1 facing the cooktop. The second air inlet 102 is located at the bottom of the housing 1 and below the first air inlet 101. The air outlet is located above the first air inlet 101. The centrifugal fan 2 is located inside the smoke collection chamber 100 and is positioned at the air outlet. The outlet 21 of the centrifugal fan 2 communicates with the air outlet, which in turn communicates with an external flue. The axial fan 3 is located inside the smoke collection chamber 100 and is positioned at the second air inlet 102 via a connecting assembly. The connecting assembly is used to adjust the position of the axial fan 3 so that the angle between the rotation center of the axial fan 3 and the vertical direction is adjustable.

[0033] The flue gas can enter the smoke collection chamber 100 through the first air inlet 101 and the second air inlet 102. The flue gas entering the smoke collection chamber 100 through the second air inlet 102 can be accelerated by the axial flow fan 3, thereby forming a directional and concentrated airflow that is actively blown upward. The flue gas drawn in from the first air inlet 101 and the flue gas accelerated and blown upward from the second air inlet 102 converge in the middle and above area of ​​the smoke collection chamber 100. The centrifugal fan 2 located at the air outlet can completely capture these two converged flue gases and apply maximum energy to them, causing them to be discharged from the outlet 21 of the centrifugal fan 2. The flue gas, further given kinetic energy by the centrifugal fan 2, can overcome the pipe resistance and be discharged at high speed into the external flue through the exhaust pipe, completing the entire suction and exhaust process. The top-mounted range hood provided in this embodiment adds an axial flow fan 3 at the second air inlet 102 at the bottom of the housing 1. Utilizing the active airflow function of the axial flow fan 3, it effectively overcomes the suction power attenuation problem caused by the installation height of traditional top-mounted range hoods. Simultaneously, the blowing and suction action of the axial flow fan 3 results in a higher flow velocity of the smoke within the long-distance flue, preventing the smoke from cooling down during long-term transport and condensing on the inner wall of the exhaust channel, thus avoiding increased airflow resistance. Furthermore, the axial flow fan 3 is connected to the second air inlet 102 via a connecting component. The angle between the rotation center of the axial flow fan 3 and the vertical direction is adjustable, allowing the direction of the airflow generated by the axial flow fan 3 to be changed. This enables the axial flow fan 3 to more accurately target different smoke sources on the cooktop, achieving directional airflow guidance, improving smoke capture efficiency, and maintaining stable exhaust performance. By setting an axial flow fan 3 at the second air inlet 102 at the bottom of the casing 1, the flue gas is guided in a directional manner so that the flue gas can flow quickly through the exhaust channel, instead of simply increasing the wind power of the centrifugal fan 2. This effectively avoids the problems of high energy consumption, high noise, and strong vibration caused by using a more powerful centrifugal fan 2.

[0034] In specific implementation, the connecting component can adopt a rotating shaft structure. The base of the axial flow fan 3 can be installed on the rotating shaft, and a drive motor can be used to drive the rotating shaft to rotate, thereby causing the axial flow fan 3 to rotate with the rotating shaft, so as to adjust the rotation center of the axial flow fan 3. In this embodiment, the angle between the rotation center of the axial flow fan 3 and the vertical direction can be preset according to different working conditions. For example, when the axial flow fan 3 is in the initial position, the rotation center of the axial flow fan 3 forms an initial angle a0 with the vertical direction, a0=0°; when the axial flow fan 3 is in the first position, the axial flow fan 3 deflects towards the back plate of the housing 1, and the rotation center of the axial flow fan 3 forms a first angle a1 with the vertical direction, a1=10°; when the axial flow fan 3 is in the second position, the axial flow fan 3 continues to deflect towards the back plate of the housing 1, and the rotation center of the axial flow fan 3 forms a second angle a2 with the vertical direction, a2=25°. The distinction between different operating conditions can be based on the detection of temperature and / or flow rate of the flue gas in the smoke collection chamber 100 by the top-mounted range hood, thereby limiting the axial flow fan 3 to switch to the corresponding position when the temperature and / or flow rate reach the preset range.

[0035] In this embodiment, the top-mounted range hood also includes a temperature sensor 7 located at the second air inlet 102. The temperature sensor 7 is signal-connected to both the centrifugal fan 2 and the axial fan 3. Specifically, in practice, the temperature of the flue gas and / or the rate of temperature change of the flue gas collected by the temperature sensor 7 at the second air inlet 102 can be used to determine whether to turn on the axial fan 3 and to adjust the axial fan 3 to the corresponding position. Furthermore, the start and stop of the centrifugal fan 2 can also be controlled based on the temperature of the flue gas and / or the rate of temperature change of the flue gas collected by the temperature sensor 7 at the second air inlet 102.

[0036] During cooking, the fumes generated are first captured by the first air inlet 101 and the second air inlet 102. When the temperature detected by the temperature sensor 7 is low, the system only activates the energy-saving mode, i.e., only the axial fan 3 is activated. By adjusting the connecting components, the air intake direction of the axial fan 3 can be directed towards the burner, achieving source capture of the fumes. The axial fan 3 accelerates the small amount of fumes drawn in and gently blows it towards the area where the centrifugal fan 2 is located. At this time, the centrifugal fan 2 may be in standby or low-speed operation, relying solely on negative pressure and the pushing force of the axial fan 3 to complete the transport and exhaust of fumes. When the temperature detected by the temperature sensor 7 is high, the system enters high-speed mode, with both channels activating simultaneously to create the strongest suction and exhaust effect. The fumes generated by the cooktop naturally rise under the action of thermal lift. The first air inlet 101, located on the front panel, faces the source of the flue gas. Under the strong negative pressure suction generated by the centrifugal fan 2 at the top, most of the flue gas is directly drawn in. The second air inlet 102, located at the bottom, also starts operating, with its internal axial flow fan 3 activating to generate auxiliary suction, capturing and drawing in flue gas that may diffuse around the edges of the cooktop and some of the flue gas surrounding the main exhaust. The axial flow fan 3's role is not only to "draw in" but, more importantly, to "blow out." It accelerates the drawn-in flue gas, forming a directional, concentrated airflow that actively blows it upwards. During its ascent, the flue gas accelerated by the axial flow fan 3 is further accelerated and pressurized by the centrifugal fan 2, ultimately being discharged outdoors through the exhaust pipe. The cascaded operation of the axial flow fan 3 and the centrifugal fan 2 improves exhaust efficiency and reduces the load on the centrifugal fan 2. Simultaneously, the dual air inlet design ensures stable exhaust performance under different operating conditions.

[0037] Optionally, the top-mounted range hood also includes a flap 6, which is rotatably mounted at the first air inlet 101 via a drive mechanism. A temperature sensor 7 is signal-connected to the drive mechanism. In this embodiment, the flap 6 is a rectangular plate, with its long side rotatably connected to the housing 1 via a drive mechanism. The drive mechanism may include a rotating shaft and a drive motor. The rotating shaft is located on the long side of the flap 6 and connected to the housing 1. One axial end of the rotating shaft is connected to the drive motor, which drives the rotating shaft to rotate, thereby rotating the flap 6 and opening or closing the first air inlet 101. Different rotation angles of the flap 6 result in different channel cross-sections provided by the first air inlet 101 for the flue gas. As the flap 6 rotates away from the housing 1, the channel cross-section at the first air inlet 101 gradually increases, reducing flow resistance. Therefore, when the temperature sensor 7 detects a high temperature, the controller controls the flap 6 to fully open, providing the maximum channel cross-section for the flue gas to enter. In other embodiments, a sliding plate may also be provided at the first air inlet 101, and the first air inlet 101 can be opened or closed by controlling the up and down movement of the sliding plate.

[0038] In this embodiment, the connecting assembly includes a universal joint 4 and a first drive motor. The universal joint 4 includes a cross universal joint 43, a first fork-shaped member 41, and a second fork-shaped member 42. The first fork-shaped member 41 is disposed on the housing 1. The two ends of the first shaft 431 of the cross universal joint 43 are rotatably connected to the first fork-shaped member 41, and the two ends of the second shaft 432 of the cross universal joint 43 are rotatably connected to the second fork-shaped member 42. An axial flow fan 3 is disposed on the second fork-shaped member 42, and the first drive motor drives the first shaft 431 to rotate relative to the first fork-shaped member 41. Figure 3 As shown, the first fork-shaped member 41 has two first support portions, and the two first support portions are correspondingly provided with two first mounting holes. The two ends of the first shaft 431 of the universal joint 43 are rotatably inserted into the two first mounting holes. The first drive motor drives the first shaft 431 to rotate, which in turn drives the universal joint 43 to rotate relative to the first fork-shaped member 41, thereby driving the axial flow fan 3 to rotate around the first shaft 431. In this embodiment, the axial direction of the first shaft 431 is perpendicular to the direction opposite to the front plate and the back plate of the housing 1. The rotation of the axial flow fan 3 around the first shaft 431 can meet the requirement that the axial flow fan 3 rotates towards the side closer to the back plate of the housing 1.

[0039] Optionally, the connecting assembly further includes a second drive motor, which drives the second fork-shaped member 42 to rotate relative to the second shaft 432. For example... Figure 3 As shown, the second fork-shaped member 42 has two second support portions, and the two second support portions are correspondingly provided with two second mounting holes. The two ends of the second shaft 432 of the universal joint 43 are rotatably inserted into the two second mounting holes. The second drive motor drives the second fork-shaped member 42 to rotate, which in turn drives the axial flow fan 3 to rotate around the second shaft 432. In this embodiment, the axial direction of the second shaft 432 is parallel to the direction opposite to the front plate and the back plate of the housing 1. The rotation of the axial flow fan 3 around the second shaft 432 can meet the controller's needs for adjusting the position of the axial flow fan 3 under other operating conditions.

[0040] Optionally, a filter screen 5 is installed at the second air inlet 102, and a connecting component is installed on the filter screen 5. Flue gas enters the smoke collection chamber 100 through the filter screen 5. To ensure the initial position of the axial flow fan 3 is parallel to the vertical direction and to guarantee the blowing and suction effect of the axial flow fan 3 on the flue gas at the second air inlet 102, the first fork-shaped component 41 is directly installed on the filter screen 5. In specific implementations, the center position of the filter screen 5 can be set as the installation area, without any perforated structure, to ensure the fixing effect of the first fork-shaped component 41. The first fork-shaped component 41 can be fixed to the filter screen 5 by welding or threaded connection.

[0041] Optionally, the second air inlet 102 is a circular hole, and the outer diameter of the circular hole is not greater than the blade diameter of the axial flow fan 3. Setting the size of the second air inlet 102 to be no larger than the blade diameter of the axial flow fan 3 can ensure the blowing and suction effect of the axial flow fan 3 on the flue gas entering the second air inlet 102, ensure the rapid flow of flue gas in the smoke collection chamber 100, and prevent some flue gas from accumulating and condensing in the smoke collection chamber 100.

[0042] Optionally, multiple second air inlets 102 are spaced apart, and each second air inlet 102 is equipped with an axial flow fan 3. The number of second air inlets 102 is determined according to the size of the cooktop to which the top-mounted range hood is adapted, to ensure effective ventilation of fumes throughout the cooktop. Preferably, the number of second air inlets 102 can exceed the number of burners in the cooktop, with at least one burner corresponding to one second air inlet 102, thereby improving the efficiency of the axial flow fan 3 in capturing fumes at the burner.

[0043] Optionally, the lower edge of the first air inlet 101 is vertically spaced from the axial flow fan 3. Flue gas can enter the smoke collection chamber 100 from the first air inlet 101 and the second air inlet 102 respectively. The axial flow fan 3 can accelerate the flue gas entering through the second air inlet 102. Therefore, it is necessary to avoid the first air inlet 101 being too close to the axial flow fan 3, so that the accelerated flue gas does not leave the smoke collection chamber 100 from the first air inlet 101.

[0044] In this embodiment, the housing 1 includes a first housing 11 and a second housing 12 arranged at an angle. The inner cavities of the first housing 11 and the second housing 12 are connected to form a smoke collection chamber 100. The first housing 11 is located above the kitchen ceiling, and the air outlet is located on the first housing 11. The second housing 12 is located below the kitchen ceiling, and both the first air inlet 101 and the second air inlet 102 are located on the second housing 12. The top-mounted range hood provided in this embodiment adopts a layered modular design, with each functional component vertically distributed in space, forming a highly efficient and collaborative smoke treatment system. The centrifugal fan 2 adopts a concealed installation method, being fully embedded in the internal space of the kitchen ceiling, without affecting the overall aesthetics of the kitchen.

[0045] The above embodiments merely illustrate the basic principles and characteristics of this utility model. This utility model is not limited to the above embodiments. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A top-mounted range hood, characterized in that, include: The housing (1) has a smoke collection chamber (100) and a first air inlet (101), a second air inlet (102) and an air outlet communicating with the smoke collection chamber (100). The first air inlet (101) is opened on the front plate of the housing (1) and faces the stove. The second air inlet (102) is opened at the bottom of the housing (1) and is located below the first air inlet (101). The air outlet is located above the first air inlet (101). Centrifugal fan (2) is located inside the smoke collection chamber (100). The centrifugal fan (2) is located at the air outlet. The outlet (21) of the centrifugal fan (2) is connected to the external flue through the air outlet. An axial flow fan (3) is located inside the smoke collection chamber (100). The axial flow fan (3) is set at the second air inlet (102) through a connecting component. The connecting component is used to adjust the position of the axial flow fan (3) so that the angle between the rotation center of the axial flow fan (3) and the vertical direction is adjustable.

2. The top-mounted range hood according to claim 1, characterized in that, The top-mounted range hood also includes a temperature sensor (7) located at the second air inlet (102), and the temperature sensor (7) is signal connected to the centrifugal fan (2) and the axial fan (3).

3. The top-mounted range hood according to claim 2, characterized in that, The top-mounted range hood also includes a flap (6), which is rotated and positioned at the first air inlet (101) by a drive component, and the temperature sensor (7) is signal-connected to the drive component.

4. The top-mounted range hood according to claim 1, characterized in that, The connecting assembly includes a universal joint (4) and a first drive motor. The universal joint (4) includes a cross universal joint (43), a first fork-shaped member (41), and a second fork-shaped member (42). The first fork-shaped member (41) is disposed on the housing (1). The two ends of the first shaft (431) of the cross universal joint (43) are rotatably connected to the first fork-shaped member (41). The two ends of the second shaft (432) of the cross universal joint (43) are rotatably connected to the second fork-shaped member (42). The axial flow fan (3) is disposed on the second fork-shaped member (42). The first drive motor drives the first shaft (431) to rotate relative to the first fork-shaped member (41).

5. The top-mounted range hood according to claim 4, characterized in that, The connecting assembly also includes a second drive motor, which drives the second fork (42) to rotate relative to the second shaft (432).

6. The top-mounted range hood according to claim 1, characterized in that, A filter (5) is provided at the second air inlet (102), and the connecting component is provided on the filter (5).

7. The top-mounted range hood according to claim 1, characterized in that, The second air inlet (102) is a circular hole, and the outer diameter of the circular hole is not greater than the blade diameter of the axial flow fan (3).

8. The top-mounted range hood according to claim 1, characterized in that, The second air inlet (102) has multiple spaced-apart inlets, and each second air inlet (102) is provided with one of the axial flow fans (3).

9. The top-mounted range hood according to claim 1, characterized in that, The lower edge of the first air inlet (101) is spaced from the axial flow fan (3) in the vertical direction.

10. The top-mounted range hood according to any one of claims 1 to 9, characterized in that, The housing (1) includes a first housing (11) and a second housing (12) arranged at an angle. The inner cavity of the first housing (11) and the inner cavity of the second housing (12) are connected to form the smoke collection chamber (100). The first housing (11) is located above the ceiling of the kitchen. The air outlet is located on the first housing (11). The second housing (12) is located below the ceiling of the kitchen. The first air inlet (101) and the second air inlet (102) are both opened on the second housing (12).

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