Fan device, air-conditioning type range hood and control method

Abstract

The invention provides a fan device, an air conditioner type range hood and a control method, the fan device comprises a driving fan and a flow guide mechanism, the driving fan comprises a fan volute, an air inlet is formed in the fan volute, the flow guide mechanism comprises a flow guide ring, and a first inlet, a second inlet and a third inlet are formed in the flow guide ring; the flow guide ring has a first state, a second state and a third state which can be driven to be switched, when the flow guide ring is in the first state, the first inlet communicates the air inlet with an air conditioner exhaust area and an oil smoke suction area of the air conditioner type extractor hood, and when the flow guide ring is in the second state, the third inlet communicates the air inlet with the oil smoke suction area. And in the third state, the air inlet communicates with the air conditioner exhaust area through the third inlet. According to the range hood, the air inlet efficiency is at a high level no matter the range hood is under the working conditions of oil suction and smoke discharge, air-conditioning refrigeration or simultaneous oil suction and smoke discharge and air-conditioning refrigeration, so that the overall performance of equipment is improved.

Description

Technical Field

[0001] This invention belongs to the field of air conditioning technology, specifically relating to a fan device, an air-conditioning type range hood, and a control method. Background Technology

[0002] Currently, air-conditioning range hoods are gradually becoming an innovative product in the kitchen appliance field. Several cooling-type range hoods have been proposed in existing technologies, integrating an air conditioning system into the traditional range hood structure. This system connects the compressor, condenser, and evaporator via refrigerant piping, achieving the dual functions of fume extraction and indoor cooling. For example, Chinese invention patent CN120120617A discloses an air-conditioning range hood that uses a side panel on the fan frame to adjust the airflow distribution between the cooling fan and the range hood, achieving airflow balance when both are running simultaneously. However, this structure has significant limitations: when only the fume extraction or air conditioning (i.e., cooling) function is used, the fixed side panel obstructs part of the air intake area, leading to reduced air intake efficiency and affecting the overall performance of the equipment. Summary of the Invention

[0003] Therefore, the present invention provides a fan device, an air-conditioning range hood, and a control method, which can overcome the shortcomings of related technologies where, when only the single function of fume extraction or cooling is used, the fixed side panel will block part of the air intake area, resulting in a decrease in air intake efficiency and a reduction in the overall performance of the equipment.

[0004] To address the aforementioned problems, this invention provides a fan device for use in an air-conditioning range hood. The device includes a driving fan and a flow guiding mechanism. The driving fan includes a fan casing with an air inlet formed thereon. The flow guiding mechanism includes a flow guiding ring surrounding the air inlet, and the flow guiding ring has a first inlet, a second inlet, and a third inlet forming radially through its inner and outer sides. The flow guiding ring has a first state, a second state, and a third state. When the flow guiding ring is in the first state, the first inlet connects the air inlet to the air-conditioning range hood. In the second state, the air conditioning exhaust area of ​​the adjustable range hood is connected, the second inlet connects the air inlet to the fume extraction area of ​​the air conditioning range hood, and the third inlet is blocked. In the third state, the third inlet connects the air inlet to the fume extraction area, and both the first and second inlets are blocked. In the third state, the third inlet connects the air inlet to the air conditioning exhaust area, and both the first and second inlets are blocked. The guide ring can be driven to switch between the first, second, and third states.

[0005] In some embodiments, the fan assembly further includes a drive component for driving the guide ring to rotate about its central axis so that the guide ring switches between the first state, the second state, and the third state.

[0006] In some embodiments, the driving component includes a rotary motor fixed to the fan casing, a driving gear being provided on the free end of the rotating shaft of the rotary motor, and a toothed ring being arranged around its circumference on the guide ring, the driving gear meshing with the toothed ring.

[0007] In some embodiments, the gear ring is located on the inner wall of the guide ring, the rotary motor is located radially inside the guide ring, and the rotary motor is covered with a motor cover.

[0008] In some embodiments, the flow guiding mechanism further includes an assembly ring, which is fixedly assembled to the fan volute, and an annular slide is formed on the end face of the assembly ring facing away from the fan volute, and the inner end face of the flow guiding ring is slidably inserted into the annular slide.

[0009] In some embodiments, a plurality of rolling elements are provided between the annular slide and the inner end face of the guide ring, arranged sequentially along the circumferential direction of the annular slide.

[0010] In some embodiments, the first inlet and the second inlet are symmetrically arranged about the rotation axis of the guide ring, and the third inlet is located between the first inlet and the second inlet.

[0011] In some embodiments, the fan casing is further provided with two sealing components. When the guide ring is in the second or third state, the two sealing components can respectively block the first inlet and the second inlet.

[0012] In some embodiments, each of the sealing components has a sealing arc plate, and a first axial limiting plate is provided on the side of the sealing arc plate away from the fan volute, the first axial limiting plate abutting against the outer end face of the guide ring.

[0013] In some embodiments, the first inlet, the second inlet, and the third inlet each have a rectangular frame on the outer wall of the guide ring, and the sealing arc plate is also provided with a second axial limiting plate on the side near the fan casing. When the position of the first inlet, the second inlet, or the third inlet corresponds to the sealing component, the rectangular frame is located between the first axial limiting plate and the second axial limiting plate.

[0014] In some embodiments, both the first inlet and the second inlet are provided with a plurality of spaced guide vanes, and each guide vane is inclined along the rotation direction of the centrifugal fan blades of the drive fan.

[0015] The present invention also provides an air-conditioning type range hood, including the above-mentioned fan device.

[0016] The present invention also provides a control method for the air-conditioning type range hood as described above, comprising the following steps: Obtain the operating mode of the air-conditioning type range hood; When the operating mode is a dual-unit operation mode for both air conditioner and range hood, the guide ring is controlled to be in the first state; or... When the operating mode is a single-smoke hood operating mode, the guide ring is controlled to be in the second state; or... When the operating mode is single air conditioner operating mode, the air guide ring is controlled to be in the third state.

[0017] The fan device, air-conditioning range hood, and control method provided by this invention have the following beneficial effects: A guide ring is installed outside the air inlet of the fan device. The guide ring has three inlets and can be driven to switch between different states. This allows the fan device of the present invention to adjust the guide ring to different states according to the operating mode of the air-conditioning range hood. This ensures that the air intake efficiency is at a high level whether the range hood is in the operation of oil extraction and exhaust, air conditioning and cooling, or both, thereby improving the overall performance of the equipment. Attached Figure Description

[0018] 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.

[0019] Figure 1 This is a three-dimensional structural schematic diagram of the fan device in an embodiment of the present invention; Figure 2 yes Figure 1 Side view of the fan unit (fan axial projection); Figure 3 yes Figure 1 Exploded view of the structure of the fan unit in the diagram; Figure 4 yes Figure 1 A three-dimensional structural diagram of the flow guiding mechanism and its matching components; Figure 5 yes Figure 1 A three-dimensional structural diagram of the sealing component in the middle; Figure 6 yes Figure 1 A front view of the assembly ring (axial projection of the fan); Figure 7 yes Figure 1 A schematic diagram of the air guide ring in the fan device when it is in the first state, with the arrows in the diagram indicating the airflow direction; Figure 8 yes Figure 1 A schematic diagram of the guide ring in the fan device when it is in the second state, with the arrows in the diagram indicating the airflow direction; Figure 9 yes Figure 1 The diagram shows the airflow direction when the guide ring in the fan device is in the third state.

[0020] The attached figures are labeled as follows: 1. Drive fan; 11. Fan casing; 111. Air inlet; 112. Air outlet; 12. Centrifugal fan blade; 13. Fan rotation drive motor; 2. Guide mechanism; 21. Guide ring; 211. First inlet; 212. Second inlet; 213. Third inlet; 214. Gear ring; 215. Rectangular frame; 216. Guide vane; 22. Assembly ring; 221. Circular slide rail; 222. Rolling element; 223. Mounting plate; 3. Drive component; 31. Rotary motor; 311. Drive gear; 32. Motor cover; 4. Sealing component; 41. Sealing arc plate; 42. First axial limiting plate; 43. Second axial limiting plate. Detailed Implementation

[0021] 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.

[0022] 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.

[0023] 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.

[0024] 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.

[0025] See also Figures 1 to 9 As shown, according to an embodiment of the present invention, a fan device is provided for use in an air-conditioning type range hood, including a driving fan 1 and a flow guiding mechanism 2. The driving fan 1 includes a fan casing 11, on which an air inlet 111 is formed. In a specific embodiment, the driving fan 1 is a centrifugal fan, and the corresponding centrifugal fan blade 12 is located inside the fan casing 11. The centrifugal fan blade 12 is assembled on the output shaft of the fan rotation drive motor 13. The flow guiding mechanism 2 includes a flow guiding ring 21, which surrounds the air inlet 111. The flow guiding ring 21 has a first inlet 211, a second inlet 212, and a third inlet 213 that penetrate its radial inner and outer sides. The flow guiding ring 21 has a first state, a second state, and a third state. When the flow guiding ring 21 is in the first state (e.g., ...), the flow guiding mechanism 2 is in the third state. Figure 7When (as shown), the first inlet 211 connects the air inlet 111 to the air conditioning exhaust area of ​​the air-conditioning range hood, the second inlet 212 connects the air inlet 111 to the oil fume extraction area of ​​the air-conditioning range hood, and the third inlet 213 is blocked, it is in the second state (as shown). Figure 8 When (as shown), the third inlet 213 connects the air inlet 111 to the fume extraction area, and both the first inlet 211 and the second inlet 212 are blocked, resulting in the third state (as shown). Figure 9 When the third inlet 213 connects the air inlet 111 to the air conditioning exhaust area, the first inlet 211 and the second inlet 212 are both blocked, and the guide ring 21 can be driven to switch between the first state, the second state and the third state.

[0026] In this technical solution, a guide ring 21 is provided outside the air inlet 111 of the fan device. The guide ring 21 has three inlets and can be driven to switch between different states. This allows the fan device of the present invention to adjust the guide ring 21 to different states according to the operating mode of the air-conditioning range hood. This ensures that the air intake efficiency is at a high level whether the range hood is in the operation of oil fume extraction, air conditioning, or both, thereby improving the overall performance of the equipment. In addition, it is worth noting that the flow area (i.e., size) of the first inlet 211, the second inlet 212, and the third inlet 213 in this application can be reasonably selected according to the actual operating conditions. Especially when the range hood is operating in the air conditioning and oil fume extraction modes simultaneously, the guide ring 21 in the first state can significantly increase the effective air intake area, thereby improving the utilization efficiency of the air intake surface of the centrifugal fan blade 12 of the driving fan 1.

[0027] In some embodiments, the fan assembly further includes a drive component 3 for driving the guide ring 21 to rotate around its central axis so that the guide ring 21 switches between the first state, the second state, and the third state.

[0028] In this technical solution, the driving component 3 can drive the guide ring 21 to rotate around its central axis, thereby enabling the guide ring 21 to switch between the aforementioned first, second, and third states, thus adapting to different operating modes of the smoke machine. Using rotation to switch the state of the guide ring 21 simplifies the structure of the fan device and simplifies the control strategy. It is understood that, at this time, the aforementioned first inlet 211, second inlet 212, and third inlet 213 should all be spaced apart along the circumference of the guide ring 21.

[0029] In some embodiments, the drive component 3 includes a rotary motor 31 fixed to the fan volute 11, a drive gear 311 is provided on the free end of the rotating shaft of the rotary motor 31, and a toothed ring 214 is provided on the guide ring 21 along its circumferential direction, and the drive gear 311 meshes with the toothed ring 214.

[0030] In this technical solution, by setting a surrounding toothed ring 214 on the wall of the guide ring 21 and setting a drive gear 311 on the free end of the rotating shaft of the rotary motor 31, the forward and reverse rotation of the rotary motor 31 can drive the drive gear 311 to rotate, and then the meshing connection between the drive gear 311 and the toothed ring 214 can realize the rotation drive of the guide ring 21, further simplifying the structural design.

[0031] In some embodiments, the gear ring 214 is located on the inner ring wall of the guide ring 21, the rotary motor 31 is located radially inside the guide ring 21, and the rotary motor 31 is covered with a motor cover 32.

[0032] In one specific embodiment, the gear ring 214 is disposed on the inner wall of the guide ring 21, and correspondingly, the rotary motor 31 is disposed in the radial inner space of the guide ring 21, making the device structure more compact. In order to prevent the oil fumes from causing adverse pollution to the rotary motor 31, a motor cover 32 is disposed outside the rotary motor 31 to effectively protect the rotary motor 31, improve the protection capability of the rotary motor 31 against water vapor and oil fumes, and increase the service life of the rotary motor 31.

[0033] In some embodiments, the flow guiding mechanism further includes an assembly ring 22, which is fixedly assembled onto the fan volute 11. An annular slide rail 221 is formed on the end face of the assembly ring 22 facing away from the fan volute 11. The inner end face of the flow guiding ring 21 is slidably inserted into the annular slide rail 221. In a specific embodiment, the aforementioned assembly ring 22 has a plurality of mounting plates 223 spaced apart along its circumference. Each mounting plate 223 is provided with a corresponding connection hole (not indicated in the figure). The assembly ring 22 and the fan volute 11 are detachably connected by turning the corresponding bolts.

[0034] In this technical solution, an assembly ring 22 is assembled on the volute 11 of the wind turbine, and a circular slide 221 is provided on the end face of the assembly ring 22 so that the inner end face of the guide ring 21 can be inserted into the circular slide 221, thereby achieving precise constraint on the rotation process of the guide ring 21 and ensuring accurate, stable and reliable switching of the guide ring 21 between different states.

[0035] In some embodiments, a plurality of rolling elements 222 are provided between the annular slide 221 and the inner end face of the guide ring 21, arranged sequentially along the circumferential direction of the annular slide 221.

[0036] In this technical solution, by setting a rolling element 222 between the annular slide 221 and the inner end face of the guide ring 21, the sliding friction between the guide ring 21 and the annular slide 221 can be converted into rolling friction, effectively reducing the friction between the guide ring 21 and the assembly ring 22, thereby reducing the wear of both during operation, improving the service life of the components, and ensuring the smooth rotation of the guide ring 21.

[0037] In some embodiments, the first inlet 211 and the second inlet 212 are symmetrically arranged about the rotation axis of the guide ring 21, and the third inlet 213 is located between the first inlet 211 and the second inlet 212. In a specific embodiment, the first inlet 211 and the second inlet 212 form a 180° angle, while the third inlet 213 forms a 90° angle with both the first inlet 211 and the second inlet 212. The calculation basis for the aforementioned angles is the projection of the line connecting the midpoint of the circumference of the corresponding inlet and the rotation center of the guide ring 21 onto the radial plane of the guide ring 21. It should be noted that the angle between the first inlet 211 and the second inlet 212 is specifically selected according to the layout of the air conditioning exhaust area and the range hood fume extraction area on the range hood. In a specific example of the present invention, the air conditioning exhaust area and the range hood fume extraction requirement are located in the upper and lower areas of the range hood's usage position, respectively. Therefore, the present invention designs the angle between the first inlet 211 and the second inlet 212 to be 180°.

[0038] In this technical solution, the first inlet 211 and the second inlet 212 are respectively set on both sides of the third inlet 213. This arrangement allows the guide ring 21 to be driven to rotate at a smaller angle between different states, and the state switching response rate is faster.

[0039] In some embodiments, the first inlet 211, the second inlet 212, and the third inlet 213 can be individually equipped with corresponding air valve structures to control their on / off states. However, this approach results in a larger mass and more complex structure for the guide ring 21. The increased mass leads to a higher power requirement for the corresponding drive component 3, while the complex guide ring structure increases product cost and is not conducive to a compact product design. As a preferred embodiment, the fan casing 11 is also provided with two sealing components 4. When the guide ring 21 is in the second or third state, the two sealing components 4 can respectively block the first inlet 211 and the second inlet 212.

[0040] In this technical solution, a sealing component 4 is set on the fan casing 11 and fixed on the fan casing 11. The guide ring 21 can rotate and move relative to the two fixed sealing components 4. By changing the relative positional relationship between each inlet on the guide ring 21 and the sealing component 4, the sealing or unsealing of the corresponding inlet can be achieved. The structure is particularly simple and there is no need to configure a moving drive component for the sealing component 4, which reduces the product design cost.

[0041] In some embodiments, each of the sealing components 4 has a sealing arc plate 41. It is understood that the shape of the sealing arc plate 41 should match the outer shape of each of the inlets to ensure the sealing effect of the sealing arc plate 41 on each inlet as much as possible. The sealing arc plate 41 is provided with a first axial limiting plate 42 on the side away from the fan volute 11. The first axial limiting plate 42 abuts against the outer end face of the guide ring 21.

[0042] In this technical solution, by abutting the first axial limiting plate 42 against the outer end face of the guide ring 21, a reliable restriction on the axial position of the guide ring 21 is formed, and the structure is simple.

[0043] In some embodiments, the first inlet 211, the second inlet 212, and the third inlet 213 each have a rectangular frame 215 on the outer wall of the guide ring 21. The sealing arc plate 41 is also provided with a second axial limiting plate 43 on the side near the fan volute 11. When the position of the first inlet 211, the second inlet 212, or the third inlet 213 corresponds to the sealing member 4, the rectangular frame 215 is located between the first axial limiting plate 42 and the second axial limiting plate 43.

[0044] In this technical solution, a limiting channel is formed by the first axial limiting plate 42 and the second axial limiting plate 43 to guide the rotation along the circumferential direction of the guide ring 21, which can further improve the sealing effect of each inlet when it is blocked.

[0045] In some embodiments, both the first inlet 211 and the second inlet 212 are provided with a plurality of spaced guide vanes 216. Each guide vane 216 is inclined along the rotation direction of the centrifugal fan blade 12 of the drive fan 1. For example, both the first inlet 211 and the second inlet 212 are provided with a plurality of guide vanes 216 inclined in the clockwise direction along the guide ring 21. Thus, when the guide ring 21 is in the first state, that is, when the air conditioning is cooling and the oil fume is being extracted at the same time, the oil fume airflow and the air conditioning exhaust airflow flow along the circumference of the guide ring 21 under the guidance of the guide vanes 216 in the first inlet 211 and the second inlet 212, respectively. In this way, the airflow entering the guide ring 21 is guided to form a vortex consistent with the rotation direction of the centrifugal fan blade 12. This can enhance the kinetic energy of the air intake, promote the smooth intake and rapid exhaust of the airflow, prevent the airflow from stagnating in the smoke machine cavity, and improve the overall exhaust efficiency. More importantly, the inclined guide vanes 216 installed in the first inlet 211 and the second inlet 212 can prevent airflow collisions when the guide ring 21 is in the first state, effectively solving the problem of mutual airflow interference and thus significantly reducing the noise during equipment operation. It should be noted that the aforementioned guide vanes 216 are not required in the third inlet 213, which can increase the effective flow area of ​​the third inlet 213, ensuring the air intake volume when the range hood is in a single operating mode (such as air conditioning cooling or fume extraction), and further ensuring the performance of the range hood in a single operating mode.

[0046] According to an embodiment of the present invention, an air-conditioning type range hood is also provided, including the above-described fan device.

[0047] According to an embodiment of the present invention, a control method for an air-conditioning type range hood as described above is also provided, comprising the following steps: Obtain the operating mode of the air-conditioning type range hood; When the operating mode is the dual-unit operation mode of air conditioner and range hood, that is, the range hood simultaneously operates the air conditioning cooling and oil fume extraction functions, the guide ring 21 is controlled in the first state. At this time, the first inlet 211 is directly facing the heat source area of ​​the stove below, while the second inlet 212 is directly facing the air conditioning exhaust area above the range hood (specifically, the hot airflow discharged from the condenser). At this time, under the driving action of the centrifugal fan 12, the air conditioning exhaust and oil fumes simultaneously enter the guide ring 21 and enter the flue to be discharged outdoors through the air inlet 111 and the air outlet 112. In particular, when the first inlet 211 and the second inlet 212 are each provided with the aforementioned inclined guide vanes 216, the guide vanes 216 guide the airflow to opposite directions (the airflow entering the second inlet 212 deflects downwards, and the airflow entering the first inlet 211 deflects upwards, forming a symmetrical double-spiral air intake), promoting... The airflow forms a circumferential flow along the circular smoke control area (i.e., the inner cavity of the guide ring 21). When the wind speed reaches a certain intensity, it can generate a vortex in the same direction as the rotation of the centrifugal fan blade 12. This not only makes fuller use of the impeller's air intake surface, improving air intake efficiency, but also enhances the axial dynamic pressure and tangential kinetic energy of the airflow. Furthermore, it ensures that the airflow has a pre-rotation angle matching the impeller's rotation before entering the centrifugal fan blade 12, thus significantly reducing airflow impact. Simultaneously, the airflow forms a more uniform flow field distribution within the fan casing 11, significantly improving the utilization rate of the impeller's air intake surface, enhancing suction and exhaust capacity, and accelerating the capture and emission of oil fumes. More importantly, this circumferential flow effectively suppresses unsteady flow phenomena common in traditional structures, such as airflow collisions, separation vortices, and recirculation zones, reducing turbulent kinetic energy and pressure pulsations, thus weakening aerodynamic noise at its source and achieving the goal of "high efficiency and low noise" operation. When the operating mode is single-range hood operation mode, the flow guide ring 21 is controlled to be in the second state. At this time, only the third inlet 213 is directly facing the heat source area of ​​the stove, achieving efficient capture and centralized flow of rising fumes. At the same time, the inlets on both sides, namely the first inlet 211 and the second inlet 212, are completely sealed by the synchronously linked sealing component 4, effectively blocking the interference of external airflow and leakage of the internal negative pressure zone, avoiding suction loss and fume escape caused by airflow diffusion, and achieving a highly efficient smoke control effect of "near-source strong suction and full-process sealing"; or, When the operating mode is single air conditioner operation mode, the flow guide ring 21 is controlled to be in the third state. At this time, only the third inlet 213 is facing the air conditioner exhaust area, so as to guide the exhaust of the hot air from the air conditioner. At the same time, the inlets on both sides, namely the first inlet 211 and the second inlet 212, are completely sealed by the synchronously linked sealing component 4, which effectively blocks the interference of external airflow and the leakage of the internal negative pressure area, and avoids suction loss caused by airflow diffusion.

[0048] 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.

[0049] 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 fan device applied to an air conditioner range hood, characterized in that, The device includes a drive fan (1) and a flow guiding mechanism (2). The drive fan (1) includes a fan casing (11) with an air inlet (111) formed thereon. The flow guiding mechanism (2) includes a flow guiding ring (21) surrounding the air inlet (111). The flow guiding ring (21) has a first inlet (211), a second inlet (212), and a third inlet (213) that penetrate its radial inner and outer sides. The flow guiding ring (21) has a first state, a second state, and a third state. When the flow guiding ring (21) is in the first state, the first inlet (211)... The air inlet (111) is connected to the air conditioning exhaust area of ​​the air-conditioning range hood, the second inlet (212) connects the air inlet (111) to the oil fume extraction area of ​​the air-conditioning range hood, and the third inlet (213) is blocked. In the second state, the third inlet (213) connects the air inlet (111) to the oil fume extraction area, and both the first inlet (211) and the second inlet (212) are blocked. In the third state, the third inlet (213) connects the air inlet (111) to the air conditioning exhaust area, and both the first inlet (211) and the second inlet (212) are blocked. The guide ring (21) can be driven to switch between the first state, the second state, and the third state.

2. The fan arrangement of claim 1, wherein It also includes a driving component (3) for driving the guide ring (21) to rotate around its central axis so that the guide ring (21) switches between the first state, the second state and the third state.

3. The fan arrangement of claim 2, wherein The drive component (3) includes a rotary motor (31) fixed on the fan volute (11). The free end of the rotating shaft of the rotary motor (31) is provided with a drive gear (311). The guide ring (21) has a toothed ring (214) arranged around its circumference. The drive gear (311) meshes with the toothed ring (214).

4. The fan arrangement of claim 3, wherein The gear ring (214) is located on the inner wall of the guide ring (21), the rotary motor (31) is located on the radial inner side of the guide ring (21), and the rotary motor (31) is covered with a motor cover (32).

5. The fan device according to claim 2, characterized in that, The flow guiding mechanism also includes an assembly ring (22), which is fixedly assembled on the fan volute (11), and a circular slide (221) is formed on the end face of the assembly ring (22) facing away from the fan volute (11), and the inner end face of the flow guiding ring (21) is slidably inserted into the circular slide (221).

6. The fan device according to claim 5, characterized in that, A plurality of rolling elements (222) are arranged sequentially along the circumferential direction of the annular slide (221) between the inner end face of the guide ring (21) and the annular slide (221).

7. The fan arrangement of any one of claims 1 to 6, wherein, The first inlet (211) and the second inlet (212) are symmetrically arranged about the rotation axis of the guide ring (21), and the third inlet (213) is located between the first inlet (211) and the second inlet (212).

8. The fan arrangement of claim 7, wherein, The fan casing (11) is also provided with a sealing component (4). There are two sealing components (4). When the guide ring (21) is in the second state or the third state, the two sealing components (4) can respectively block the first inlet (211) and the second inlet (212).

9. The fan arrangement of claim 8, wherein, Each of the sealing components (4) has a sealing arc plate (41), and the sealing arc plate (41) is provided with a first axial limiting plate (42) on the side away from the fan volute (11), and the first axial limiting plate (42) abuts against the outer end face of the guide ring (21).

10. The fan arrangement of claim 9, wherein, The first inlet (211), the second inlet (212), and the third inlet (213) each have a rectangular frame (215) on the outer wall of the guide ring (21). The sealing arc plate (41) is also provided with a second axial limiting plate (43) on the side near the fan volute (11). When the position of the first inlet (211), the second inlet (212), or the third inlet (213) corresponds to the sealing member (4), the rectangular frame (215) is located between the first axial limiting plate (42) and the second axial limiting plate (43).

11. The fan arrangement of claim 7, wherein Both the first inlet (211) and the second inlet (212) are provided with a plurality of spaced guide vanes (216), and each guide vane (216) is inclined along the rotation direction of the centrifugal fan blade (12) of the drive fan (1).

12. An air-conditioning type range hood, characterized by comprising: The wind turbine assembly includes any one of claims 1 to 11.

13. The control method of the air-conditioning type range hood according to claim 12, characterized by, Includes the following steps: Obtain the operating mode of the air-conditioning type range hood; When the operating mode is the dual-machine operating mode of air conditioner and range hood, the guide ring (21) is controlled to be in the first state; or, When the operating mode is a single-smoke machine operating mode, the guide ring (21) is controlled to be in the second state; or, When the operating mode is single air conditioning operating mode, the flow guide ring (21) is controlled to be in the third state.

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