Exhaust fan of range hood, refrigeration type range hood and control method of refrigeration type range hood

Abstract

The invention provides a range hood exhaust fan, a refrigeration type range hood and a control method thereof.The range hood exhaust fan comprises a fan body and an airflow separation mechanism, and the airflow separation mechanism is located on a fan air inlet so as to divide the fan air inlet into a first air inlet channel and a second air inlet channel; the airflow separation mechanism comprises a fixed baffle and movable baffles located at the two ends of the fixed baffle, the airflow separation mechanism has a first state and a second state, when the airflow separation mechanism is in the first state, the two movable baffles are located in the projection range of the fixed baffle on the horizontal plane, and when the airflow separation mechanism is in the second state. The two movable baffles are located outside the projection range of the fixed baffle on the horizontal plane, the two movable baffles are located outside the projection range of the oil smoke suction port on the horizontal plane, and the airflow separation mechanism can be controlled to be switched between the first state and the second state. According to the range hood, high exhaust efficiency can be achieved during single-mode operation of the range hood, and low operation airflow impact noise can be achieved during dual-mode operation of the range hood.

Description

Technical Field

[0001] This invention belongs to the field of air conditioning technology, specifically relating to a range hood exhaust fan, a refrigerated range hood, and a control method thereof. Background Technology

[0002] Cooling-type range hoods integrate a cooling system to achieve cooling while absorbing cooking fumes, effectively reducing kitchen temperature and improving the working environment. However, during operation, the heat generated by the internal condenser components needs to be dissipated promptly. Existing technologies use two exhaust channels to expel the heat and cooking fumes from the condenser components. However, this design easily leads to interference between the cooling airflow and the cooking fume airflow, resulting in decreased fan performance, increased noise, and potential contamination of the condenser module by the cooking fumes, affecting the energy efficiency of the air conditioning system. Patent CN120120617A proposes adding a fixed baffle in the air inlet channel, which can alleviate the interference between the cooling airflow and the cooking fume airflow to some extent. However, when the cooling and fume extraction power are high, the cooling airflow still significantly disturbs the cooking fume airflow, and the high-speed airflow impacting the baffle generates noise. Furthermore, the baffle obstructs airflow, causing a decrease in exhaust efficiency when the range hood operates in either cooling or fume extraction mode. In other words, the fixed baffle structure in the existing technology lacks effective control over the airflow path, making it difficult to achieve coordinated optimization of fume extraction and heat dissipation, thus limiting the improvement of overall performance. Summary of the Invention

[0003] Therefore, the present invention provides a range hood exhaust fan, a refrigerated range hood and its control method, which can overcome the shortcomings of related technologies where a fixed baffle is set in the air inlet channel of a refrigerated range hood, which lacks effective control over the airflow path, makes it difficult to achieve coordinated optimization of oil fume extraction and heat dissipation, and limits the improvement of overall performance.

[0004] To address the aforementioned problems, this invention provides a range hood exhaust fan, comprising a fan body and an airflow separating mechanism. The fan body has a fan volute, and the fan volute has a fan inlet. The airflow separating mechanism is positioned on the fan inlet of the fan body to divide the fan inlet into a first air inlet channel and a second air inlet channel. The first air inlet channel is connected to the exhaust port of the condenser assembly of the range hood's air conditioning module, and the second air inlet channel is connected to the fume extraction port of the range hood. The airflow separating mechanism includes a fixed baffle and movable baffles at both ends of the fixed baffle. The airflow separation mechanism has a first state and a second state. Taking the orientation of the range hood in use as a reference, when the airflow separation mechanism is in the first state, the two movable baffles are within the projection range of the fixed baffle on the horizontal plane. When the airflow separation mechanism is in the second state, the two movable baffles are outside the projection range of the fixed baffle on the horizontal plane, and the two movable baffles are outside the projection range of the oil fume inlet on the horizontal plane. The airflow separation mechanism can be controlled to switch between the first state and the second state.

[0005] In some embodiments, the fixed baffle is an arc plate arched toward the exhaust port side of the condenser assembly; and / or, the exhaust fan of the range hood is a centrifugal fan.

[0006] In some embodiments, each of the movable baffles is a flat plate. When the airflow separation mechanism is in the first state, each of the movable baffles is in a vertical state. When the airflow separation mechanism is in the second state, the guide surface of each of the movable baffles is tangent to the guide surface of the corresponding end of the arc plate.

[0007] In some embodiments, the exhaust fan of the range hood is further provided with a driving component, wherein the first end of each of the movable baffles is hinged to the end of the fixed baffle, and the driving component is used to drive the movable baffles to rotate around the hinge point.

[0008] In some embodiments, the drive component includes a rotary motor fixed to the volute of the fan body and a linkage assembly connecting the output shaft of the rotary motor and the movable baffle; and / or, the drive component is configured with a set for each of the movable baffles.

[0009] In some embodiments, the fixed baffle has a flange on the side away from the fan inlet that protrudes toward the exhaust port side of the condenser assembly.

[0010] In some embodiments, the fixed baffle and / or the movable baffle has flow holes extending through both sides thereon.

[0011] In some embodiments, the flow area of ​​each of the flow holes is 10 mm².2 -80mm 2 .

[0012] The present invention also provides a refrigerated range hood, including the above-mentioned range hood exhaust fan. With the position of the refrigerated range hood in use as a reference, the fan casing gets closer and closer to the front side of the range hood from top to bottom, and the fan casing and the back plate of the range hood form an air inlet channel for the range hood exhaust fan.

[0013] The present invention also provides a control method for the above-mentioned refrigerated range hood, comprising the following steps: Obtain the operating mode of the range hood; When the operating mode is single cooling or single fume extraction mode, the airflow separation mechanism is controlled to be in the first state; When the operating mode is the cooling and fume extraction mode, the airflow separation mechanism is controlled to be in the second state.

[0014] The present invention provides a range hood exhaust fan, a refrigerated range hood, and a control method thereof, which have the following beneficial effects: The airflow separation mechanism has a first state with a smaller airflow obstruction area and a second state with a larger obstruction area, and can be controlled to switch between the aforementioned first and second states. In the range hood of the present invention, when operating in single cooling or single fume extraction mode, the airflow separation mechanism is controlled to be in the first state with a smaller obstruction area, so that the upper and lower separated first and second air inlet channels can form a certain degree of connection at the left and right ends of the fixed baffle, reducing the obstruction to the airflow. This allows the airflow from one air inlet channel to enter the fan through the other air inlet channel and be discharged, improving the exhaust efficiency of the range hood in single operation mode. When the range hood is operating in cooling and fume extraction mode, that is, when the range hood is operating both cooling and fume extraction simultaneously, the airflow separation mechanism is controlled to be in the second state with a larger obstruction area, increasing the obstruction area of ​​the airflow in the upper and lower separated first and second air inlet channels, thereby effectively reducing the interference between the heat dissipation airflow and the fume airflow, and avoiding the impact noise caused by excessive airflow. In other words, the state-switchable airflow separation mechanism of this application can take into account the advantages of high exhaust efficiency when the range hood is operating in single mode and low operating airflow impact noise when operating in dual mode. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention or related technologies, the accompanying drawings used in the description of the embodiments or related technologies will be briefly introduced below. The drawings described below are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0016] Figure 1This is a three-dimensional structural diagram of the exhaust fan of the range hood in an embodiment of the present invention; Figure 2 yes Figure 1 A magnified view of a section at point A in the middle; Figure 3 yes Figure 1 A magnified view of a section at point B in the middle; Figure 4 yes Figure 1 A three-dimensional structural diagram of the fixed baffle in the diagram; Figure 5 This is a schematic diagram (front view) of the refrigerated range hood in an embodiment of the present invention. Figure 6 yes Figure 5 A three-dimensional structural diagram of a refrigerated range hood (the outer casing of the range hood is omitted). Figure 7 This is a rear view of a refrigerated range hood in an embodiment of the present invention, in which the airflow separation mechanism is in the second state; Figure 8 This is a rear view of a refrigerated range hood in an embodiment of the present invention, in which the airflow separation mechanism is in the first state.

[0017] The attached figures are labeled as follows: 1. Fan body; 10. Fan inlet; 11. Fan casing; 12. Fan blade; 13. Fan exhaust outlet; 2. Airflow separation mechanism; 20. Flow hole; 21. Fixed baffle; 211. Flange; 22. Movable baffle; 221. Hinge; 222. Connecting ear; 3. Drive component; 31. Rotary motor; 321. First connecting rod; 322. Second connecting rod; 4. Range hood housing; 41. Range hood back plate; 42. Range hood exhaust outlet; 100. First air inlet channel; 200. Second air inlet channel; 201. Oil fume inlet; 301. Compressor; 302. Condensation assembly; 3021. Condensation exhaust duct; 303. Evaporation assembly. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description. Unless otherwise stated, these directional terms 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, and therefore should not be construed as a limitation on the scope of protection of this invention; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0020] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90° or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0021] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention.

[0022] See also Figures 1 to 8 As shown, according to an embodiment of the present invention, a range hood exhaust fan is provided, including a fan body 1 and an airflow separating mechanism 2. The fan body 1 has a fan volute 11 and a fan blade 12 (in a specific embodiment, a centrifugal fan blade) located within the fan volute 11. The fan volute 11 has a fan inlet 10. When the fan blade 12 is a centrifugal fan blade, the corresponding fan volute 11 is a centrifugal volute. The aforementioned fan inlet 10 is an inlet located on the axial end face of the centrifugal volute. The airflow separating mechanism 2 is located on the fan inlet 10 of the fan body 1 to separate the fan inlet 10 into a first air inlet channel 100 and a second air inlet channel 200. See also... Figure 1As shown, with the range hood in use as a reference, the aforementioned airflow separation mechanism 2 divides the fan inlet 10 into two adjacent upper and lower parts. The upper part is the first air inlet channel 100, and the lower part is the second air inlet channel 200. The first air inlet channel 100 is connected to the exhaust port of the condenser assembly 302 of the range hood air conditioning module. It can be understood that the aforementioned range hood air conditioning module is located at the top of the range hood. The second air inlet channel 200 is connected to the oil fume inlet 201 of the range hood, which is located at the bottom of the range hood. The airflow separation mechanism 2 includes a fixed baffle 21 and movable baffles 22 at both ends of the fixed baffle 21. The airflow separation mechanism 2 has a first... The first and second states are based on the orientation of the range hood in use. When the airflow separating mechanism 2 is in the first state, the two movable baffles 22 are within the projection range of the fixed baffle 21 on the horizontal plane. When the airflow separating mechanism 2 is in the second state, the two movable baffles 22 are outside the projection range of the fixed baffle 21 on the horizontal plane, and the two movable baffles 22 are outside the projection range of the oil fume inlet 201 on the horizontal plane. The airflow separating mechanism 2 can be controlled to switch between the first and second states. That is, when the airflow separating mechanism 2 is in the second state, the area of ​​airflow obstruction and separation is greater than the area of ​​airflow obstruction and separation when it is in the first state.

[0023] In this technical solution, the airflow separating mechanism 2 has a first state with a smaller airflow obstruction area and a second state with a larger obstruction area, and can be controlled to switch between the aforementioned first and second states. When the range hood in this invention operates in single cooling or single fume extraction mode, the airflow separating mechanism 2 is controlled to be in the first state with a smaller obstruction area, so that the upper and lower separated first air inlet channel 100 and second air inlet channel 200 can form a certain degree of communication at the left and right ends of the fixed baffle 21, reducing obstruction to the airflow. This allows the airflow escaping from one air inlet channel to enter the fan from the other air inlet channel and be discharged, improving efficiency. The exhaust efficiency of the range hood in single operation mode; while when the range hood is running in cooling and fume extraction mode, that is, when the range hood is running both cooling and fume extraction simultaneously, the airflow separation mechanism 2 is controlled to be in a second state with a larger blocking and separation area, which increases the blocking and isolation area of ​​the airflow in the upper and lower separated first air inlet channel 100 and second air inlet channel 200, thereby effectively reducing the interference between the heat dissipation airflow and the fume airflow, and avoiding the impact noise caused by excessive airflow. That is, the state-switchable airflow separation mechanism 2 in this application can take into account the advantages of high exhaust efficiency when the range hood is running in single mode and low operating airflow impact noise when running in dual mode.

[0024] It is worth emphasizing that when the aforementioned airflow separation mechanism 2 is in the second state, the two movable baffles 22 on the left and right are outside the projection range of the fume extraction port 201 on the horizontal plane. This allows the heat dissipation airflow that escapes when the range hood is running in both cooling and fume extraction modes to be guided to an area far away from the coverage of the fume extraction port 201. This effectively reduces the adverse interference to the fume extraction path caused by the heat dissipation airflow overflowing to the second air intake channel 200 side, ensuring the efficient extraction of fumes from the kitchen interior by the range hood.

[0025] In some embodiments, the fixed baffle 21 is an arc plate that arches toward the exhaust port side of the condensation assembly 302.

[0026] In this technical solution, by designing the fixed baffle 21 as an arc plate arched towards the exhaust port side of the condensing component 302, the heat dissipation airflow sent from the condensing exhaust duct 3021 of the condensing component 302 can be guided to the left and right sides along its smooth arc surface to achieve uniform flow. Compared with the V-shaped plate or L-shaped plate structure, the heat dissipation gas flow rate is more stable and the noise generated is less.

[0027] In some embodiments, each of the movable baffles 22 is a flat plate. When the airflow separation mechanism 2 is in the first state, each of the movable baffles 22 is in a vertical state. When the airflow separation mechanism 2 is in the second state, the guide surface of each of the movable baffles 22 is tangent to the guide surface of the corresponding end of the arc plate.

[0028] In this technical solution, the movable baffle 22 is a flat plate, and when the airflow separation mechanism 2 is in the second state, the guide surface of the movable baffle 22 is tangent to the guide surface of the arc plate, which can further improve the smoothness of the movable baffle 22 in guiding the heat dissipation airflow to both ends of the fixed baffle 21 in the aforementioned second state and reduce the airflow resistance.

[0029] In some embodiments, the exhaust fan of the range hood is further provided with a driving component 3, and the first end of each of the movable baffles 22 is hinged to the end of the fixed baffle 21. The driving component 3 is used to drive the movable baffles 22 to rotate around the hinge point. Specifically, the first end of the aforementioned movable baffles 22 and the fixed baffle 21 are rotatably connected by a hinge 221.

[0030] In this technical solution, the movable baffle 22 is hinged to one end of the fixed baffle 21 and a corresponding driving component 3 is provided to drive the movable baffle 22 to rotate around the hinge point between it and the fixed baffle 21, thereby realizing the switching of the aforementioned airflow separation mechanism 2 between the first state and the second state. The design is simple and the structure is compact.

[0031] In one specific embodiment, the drive component 3 is configured with a set for each of the movable baffles 22. This eliminates the need to consider the transmission structure required for the movable baffles 22 at both ends to share the same drive component 3, which can further simplify the design of the internal structure of the smoke machine.

[0032] In some embodiments, the driving component 3 includes a rotary motor 31 fixed to the fan casing 11 of the fan body 1 and a linkage assembly connected between the output shaft of the rotary motor 31 and the movable baffle 22. The linkage assembly specifically includes a first linkage 321 fixedly connected to the output shaft of the rotary motor 31 and a second linkage 322 hinged to the movable baffle 22. The first linkage 321 and the second linkage 322 are hinged at one end respectively, so that the rotation of the rotary motor 31 can be used to drive the movable baffle 22 to swing and rotate via the linkage assembly.

[0033] To ensure a reliable connection between the second link 322 and the movable baffle 22, the movable baffle 22 is also provided with a connecting lug 222, and the second link 322 is hinged to the connecting lug 222.

[0034] In some embodiments, the fixed baffle 21 has a flange 211 protruding toward the exhaust port side of the condenser assembly 302 on the side away from the fan inlet 10.

[0035] In this technical solution, by providing a flange 211 on the fixed baffle 21, the heat dissipation airflow flowing outward along the axial direction of the fan volute 11 can be guided toward the side of the condenser assembly 302, preventing this part of the heat dissipation airflow from entering the second air inlet channel 200 from the first air inlet channel 100 at the end face of the fixed baffle 21 away from the fan volute 11, and further reducing the probability of the heat dissipation airflow and the oil fume airflow coming into direct contact and impact within the shielding range of the fixed baffle 21.

[0036] In some embodiments, the fixed baffle 21 and / or the movable baffle 22 have flow holes 20 extending through both sides of them.

[0037] In this technical solution, the flow holes 20 that pass through the upper and lower sides of the fixed baffle 21 and the movable baffle 22 can block the direct impact of the heat dissipation airflow and the oil fume airflow on the fixed baffle 21 and the movable baffle 22, while also increasing the air intake of the fan inlet 10 when the range hood is running in single cooling or single oil fume suction mode, thereby improving the exhaust efficiency in single mode.

[0038] In some embodiments, the flow area of ​​each of the flow holes 20 is 10 mm². 2 -80mm 2This ensures that the fixed baffle 21 and the movable baffle 22 prevent the direct impact of the heat dissipation airflow and the oil fume airflow when the range hood is simultaneously cooling and absorbing oil fumes, while also increasing the airflow passage area when the range hood is operating in a single mode.

[0039] According to an embodiment of the present invention, a refrigerated range hood is also provided, including the aforementioned range hood exhaust fan. With reference to the orientation of the refrigerated range hood in its operating state, the fan casing 11 moves from top to bottom closer to the front of the range hood. An air inlet channel for the exhaust fan is formed between the fan casing 11 and the range hood back plate 41 (i.e., the portion of the range hood outer casing 4 located at the rear of the range hood). At this time, the drive motor of the aforementioned fan blade 12 is located on the side of the fan casing 11 closest to the front plate of the range hood (not indicated in the figure). In a specific embodiment, when the fan casing 11 is a centrifugal casing, the aforementioned airflow separation mechanism 2 is provided between the fan inlet 10 on the rear side of the centrifugal casing and the back plate 41 of the range hood. However, due to space limitations, the aforementioned airflow separation mechanism 2 is not provided at the fan inlet 10 on the front side of the centrifugal casing, thereby making the overall structure of the range hood compact and reducing its overall volume. Of course, in some working conditions where installation space is not a concern, the aforementioned airflow separation mechanism 2 can also be provided at the fan inlet 10 on the front side of the centrifugal casing. See details. Figure 6 As shown, the air conditioning module of the refrigerated range hood of the present invention further includes a compressor 301 and an evaporation component 303, wherein the evaporation component 303 is used to cool the airflow in the kitchen interior space.

[0040] According to an embodiment of the present invention, a control method for the above-described refrigerated range hood is also provided, comprising the following steps: Obtain the operating mode of the range hood; When the operating mode is single cooling or single fume extraction, the airflow separation mechanism 2 is controlled to be in the first state, specifically by controlling the aforementioned rotary motor 31 to operate so that the movable baffle 22 is in a vertical state. Figure 8 As shown; When the operating mode is the cooling and fume extraction mode, the airflow separation mechanism 2 is controlled to be in the second state. Specifically, the aforementioned rotary motor 31 is controlled to operate so that the movable baffle 22 opens from the side closer to the fume extraction port 201 of the range hood to the side farther away to a preset maximum angle. Figure 7 As shown.

[0041] It will be readily understood by those skilled in the art that, without conflict, the advantageous technical features of the above-mentioned methods can be freely combined and superimposed.

[0042] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention. The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the protection scope of the present invention.

Claims

1. A range hood exhaust fan, characterized in that, The device includes a fan body (1) and an airflow separation mechanism (2). The fan body (1) has a fan volute (11) and a fan inlet (10). The airflow separation mechanism (2) is located on the fan inlet (10) to divide the fan inlet (10) into a first air inlet channel (100) and a second air inlet channel (200). The first air inlet channel (100) is connected to the exhaust port of the condenser assembly (302) of the range hood air conditioning module, and the second air inlet channel (200) is connected to the oil fume inlet (201) of the range hood. The airflow separation mechanism (2) includes a fixed baffle (21) and movable baffles located at both ends of the fixed baffle (21). The movable baffle (22) and the airflow separation mechanism (2) have a first state and a second state. Taking the position of the range hood in use as a reference, when the airflow separation mechanism (2) is in the first state, the two movable baffles (22) are within the projection range of the fixed baffle (21) on the horizontal plane. When the airflow separation mechanism (2) is in the second state, the two movable baffles (22) are outside the projection range of the fixed baffle (21) on the horizontal plane, and the two movable baffles (22) are outside the projection range of the oil fume inlet (201) on the horizontal plane. The airflow separation mechanism (2) can be controlled to switch between the first state and the second state.

2. The exhaust fan for a smoke hood according to claim 1, characterized in that, The fixed baffle (21) is an arc plate arched towards the exhaust port side of the condenser assembly (302); and / or, the exhaust fan of the smoke hood is a centrifugal fan.

3. The exhaust fan for a range hood according to claim 2, characterized in that, Each of the movable baffles (22) is a flat plate. When the airflow separation mechanism (2) is in the first state, each of the movable baffles (22) is in a vertical state. When the airflow separation mechanism (2) is in the second state, the guide surface of each of the movable baffles (22) is tangent to the guide surface of the corresponding end of the arc plate.

4. The exhaust fan for a smoke hood according to claim 3, characterized in that, A driving component (3) is also provided, wherein the first end of each of the movable baffles (22) is hinged to the end of the fixed baffle (21), and the driving component (3) is used to drive the movable baffles (22) to rotate around the hinge point.

5. The exhaust fan for a range hood according to claim 4, characterized in that, The drive component (3) includes a rotary motor (31) fixed on the fan casing (11) of the fan body (1) and a linkage assembly connected between the output shaft of the rotary motor (31) and the movable baffle (22); and / or, the drive component (3) is configured with a set for each of the movable baffles (22).

6. The exhaust fan for a smoke hood according to claim 1, characterized in that, The fixed baffle (21) has a flange (211) protruding towards the exhaust port side of the condenser assembly (302) on the side away from the fan inlet (10).

7. The exhaust fan for a smoke hood according to claim 1, characterized in that, The fixed baffle (21) and / or the movable baffle (22) have flow holes (20) that pass through both sides of them.

8. The exhaust fan for a smoke hood according to claim 7, characterized in that, The flow area of ​​each of the aforementioned flow holes (20) is 10 mm². 2 -80mm 2 .

9. A refrigerated range hood, characterized in that, The exhaust fan of the range hood included in any one of claims 1 to 8, with reference to the position of the refrigerated range hood in use, the fan volute (11) gets closer and closer to the front side of the range hood from top to bottom, and the fan volute (11) and the range hood back plate (41) form the air inlet channel of the exhaust fan.

10. A control method for a refrigerated range hood as described in claim 9, characterized in that, Includes the following steps: Obtain the operating mode of the range hood; When the operating mode is single cooling or single fume extraction mode, the airflow separation mechanism (2) is controlled to be in the first state; When the operating mode is the cooling and fume extraction mode, the airflow separation mechanism (2) is controlled to be in the second state.

Images