A fan, a range hood and a control method of the fan

Abstract

The application discloses a fan, an extractor hood and a control method of the fan, and comprises the following steps: a volute fan body is arranged in a volute; a liftable guide vane; a driving device; an air outlet channel is formed between the fan body and the volute; the liftable guide vane is driven by the driving device to descend into the air outlet channel or to ascend to the outside of the volute. When it is needed to guide the air flow in the fan, the liftable guide vane is driven by the driving device to descend into the air outlet channel between the volute and the fan body, the air flow can be guided, the efficiency of the fan is improved, and the noise of the air outlet is reduced. When it is not needed to guide the air flow in the fan, the liftable guide vane is driven by the driving device to ascend to the outside of the volute, the problem that the efficiency of the fan is reduced when the liftable guide vane is located in the air outlet channel with small air volume is avoided, and dynamic control of the guide vane in the fan is realized.

Description

TECHNICAL FIELD

[0001] The present application relates to the kitchen electrical technology field, and particularly relates to a fan, a range hood and a control method of the fan. BACKGROUND

[0002] The fan in the range hood has a large air outlet when the rotating speed is large, and the large air outlet leads to large air outlet resistance, and the large air outlet resistance greatly reduces the air outlet efficiency of the fan and causes large noise.

[0003] At present, for the volute fan, in order to improve the air outlet efficiency of the fan, a guide plate is arranged in the air outlet channel to guide the airflow when the air outlet resistance is large, so as to improve the air outlet efficiency of the fan and reduce the noise.

[0004] However, the guide plate in the existing volute fan is fixedly arranged in the volute, and cannot be moved, that is, the guide plate cannot be dynamically controlled, and the use is not flexible, so that when the air outlet resistance is small, the arrangement of the guide plate reduces the air outlet efficiency of the fan. SUMMARY

[0005] The present application provides a fan, a range hood and a control method of the fan to realize dynamic control of the guide plate.

[0006] According to an aspect of the present application, a fan is provided, comprising:

[0007] a volute;

[0008] a fan body arranged in the volute;

[0009] a liftable guide plate;

[0010] a driving device;

[0011] an air outlet channel formed between the fan body and the volute;

[0012] the liftable guide plate is lowered into the air outlet channel under the driving of the driving device, or is raised to the outside of the volute under the driving of the driving device.

[0013] Optionally, the driving device comprises a driving motor and a lead screw.

[0014] The liftable guide plate comprises a threaded groove, the threaded groove is adapted to the lead screw, and the thread of the threaded groove is adapted to the thread of the lead screw.

[0015] One end of the lead screw is fixedly connected with the driving motor, and at least part of the lead screw is located in the threaded groove on the side away from the driving motor.

[0016] The lead screw rotates under the driving of the driving motor.

[0017] Optionally, the fan further comprises a smooth guide rod.

[0018] The liftable baffle further comprises a fixing groove, the extending direction of the fixing groove is parallel to the extending direction of the screw groove, and the fixing groove is adapted to the smooth guide rod.

[0019] At least part of the smooth guide rod is accommodated in the fixing groove.

[0020] According to another aspect of the present application, there is provided an extractor hood, comprising: an air outlet cover mounting structure, a smoke collecting system and a connecting pipe;

[0021] One end of the connecting pipe is connected to the air inlet pipe of the air outlet cover mounting structure, and the other end of the connecting pipe is connected to the air outlet pipe of the smoke collecting system.

[0022] The air outlet cover mounting structure comprises the fan.

[0023] Optionally, the air outlet cover mounting structure comprises a top plate.

[0024] The top plate is located on the side of the fan away from the air inlet.

[0025] When the driving device comprises a driving motor and a screw rod, the driving motor is fixed to the top plate.

[0026] Optionally, when the fan comprises a smooth guide rod, the side of the smooth guide rod away from the liftable baffle is fixed to the top plate.

[0027] According to another aspect of the present application, there is provided a control method of a fan, for controlling the fan, comprising:

[0028] Continuously acquiring the air outlet resistance at the air outlet position of the fan and the position information of the liftable baffle;

[0029] Judging whether the air outlet resistance is greater than a preset resistance;

[0030] If yes, judging whether to drive the liftable baffle to descend according to the position information;

[0031] If yes, outputting a first control signal to the driving device to control the driving device to drive the liftable baffle to descend into the air outlet passage; and returning to the step of continuously acquiring the air outlet resistance at the air outlet position of the fan and the position information of the liftable baffle.

[0032] Optionally, the control method of the fan further comprises:

[0033] If it is determined that the air outlet resistance is not greater than the preset resistance, judging whether to drive the liftable baffle to ascend according to the position information;

[0034] If yes, output the second control signal to the driving device to control the driving device to drive the liftable guide vane to rise to the outside of the volute; and return to execute the step of continuously acquiring the air outlet resistance at the air outlet position of the fan and the position information of the liftable guide vane.

[0035] Optionally, the control method of the fan further comprises:

[0036] If it is determined according to the position information that the liftable guide vane is not driven to rise when the air outlet resistance is not greater than the preset resistance, the output of the first control signal and the second control signal to the driving device is stopped; and the step of continuously acquiring the air outlet resistance at the air outlet position of the fan and the position information of the liftable guide vane is executed.

[0037] Optionally, the control method of the fan further comprises:

[0038] If it is determined according to the position information that the liftable guide vane is not driven to rise when the air outlet resistance is not greater than the preset resistance, the output of the first control signal and the second control signal to the driving device is stopped; and the step of continuously acquiring the air outlet resistance at the air outlet position of the fan and the position information of the liftable guide vane is executed.

[0039] Optionally, before continuously acquiring the air outlet resistance at the air outlet position of the fan, the method further comprises:

[0040] Continuously acquiring a gear signal of the fan;

[0041] Judging whether the running gear of the fan is a preset gear according to the gear signal;

[0042] If yes, acquiring the air outlet resistance at the air outlet position of the fan and the position information of the liftable guide vane;

[0043] If no, only acquiring the position information of the liftable guide vane, and executing the step of judging whether the liftable guide vane is driven to rise according to the position information.

[0044] The fan provided by the embodiment of the application is provided with the liftable guide vane and the driving device, so that when it is needed to guide the air flow in the fan, the driving device drives the liftable guide vane to descend to the air outlet passage between the volute and the fan body, the air flow can be guided, the efficiency of the fan is improved, and the air outlet noise is reduced; when it is not needed to guide the air flow in the fan, the driving device drives the liftable guide vane to rise to the outside of the volute, the problem that the liftable guide vane is located in the air outlet passage and the efficiency of the fan is reduced when the air volume is small is avoided, and the dynamic control of the guide vane in the fan is realized.

[0045] It should be understood that the content described in this part is not intended to identify the key or important features of the embodiments of the application, nor is it used to limit the scope of the application. Other features of the application will become apparent from the following description. Attached Figure Description

[0046] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0047] Figure 1 This is a schematic diagram of the structure of a fan provided in an embodiment of the present invention;

[0048] Figure 2 This is a schematic diagram of another type of fan provided in an embodiment of the present invention;

[0049] Figure 3 This is a schematic diagram of a liftable guide plate provided in an embodiment of the present invention;

[0050] Figure 4 This is a schematic diagram of the structure of a range hood provided in an embodiment of the present invention;

[0051] Figure 5 This is a schematic diagram of the structure of another range hood provided in an embodiment of the present invention;

[0052] Figure 6 This is a schematic diagram of the structure of another range hood provided in an embodiment of the present invention;

[0053] Figure 7 This is a flowchart of a fan control method provided in an embodiment of the present invention;

[0054] Figure 8 This is a flowchart of another fan control method provided in an embodiment of the present invention;

[0055] Figure 9 This is a flowchart of another fan control method provided in an embodiment of the present invention;

[0056] Figure 10 This is a schematic diagram of the structure of a fan control device provided in an embodiment of the present invention;

[0057] Figure 11 This is a schematic diagram of the structure of another fan control device provided in an embodiment of the present invention;

[0058] Figure 12 This is a schematic diagram of the structure of another fan control device provided in an embodiment of the present invention;

[0059] In the picture:

[0060] 01: fan; 1: volute; 2: fan body; 3: liftable guide plate; 4: driving device; 5: air outlet channel; 6: smooth guide rod; 31: threaded groove; 32: fixing groove; 41: driving motor; 42: screw rod;

[0061] 100: air outlet cover mounting structure; 200: smoke collection system; 300: connecting pipe; 110: air outlet cover; 120: box body; 121: air outlet of the box body 120; 122: top plate;

[0062] 1000: comprehensive information acquisition module; 2000: resistance judgment module; 3000: lowering control judgment module; 4000: first output and cycle control module; 5000: rising control judgment module; 6000: second output and cycle control module; 7000: third output and cycle control module. DETAILED DESCRIPTION

[0063] In order to enable the personnel in the technical field to better understand the present application scheme, the technical scheme in the embodiments of the present application will be described clearly and completely in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by the personnel in the field without making creative efforts should belong to the protection scope of the present application.

[0064] It should be noted that the terms "first", "second" and the like in the specification and claims of the present application and the above-described drawings are used to distinguish similar objects, and do not have to be used to describe a specific order or sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device that includes a series of steps or units does not have to be limited to those steps or units clearly listed, but can include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0065] Figure 1 is a structural schematic diagram of a fan provided by an embodiment of the present application, Figure 2 is a structural schematic diagram of another fan provided by an embodiment of the present application, in combination with reference to Figure 1 and Figure 2The fan 01 comprises: a volute 1; a fan body 2 arranged in the volute 1; a liftable guide plate 3; a driving device 4; an air outlet channel 5 formed between the fan body 2 and the volute 1; and the liftable guide plate 3 is driven by the driving device 4 to descend into the air outlet channel 5 or to ascend outside the volute 1.

[0066] Specifically, the air outlet channel 5 formed by the circular fan body 2 and the volute 1 is curved, and the radius of curvature of the liftable guide plate 3 can be the same as that of the air outlet channel 5 to guide the air flow when the liftable guide plate 3 is located in the air outlet channel 5. The driving device 4 can drive the liftable guide plate 3 to ascend or descend, and when the air flow needs to be guided, the driving device 4 can drive the liftable guide plate 3 to descend into the air outlet channel 5 between the fan body 2 and the volute 1, as shown in FIG. 2, so that the air flow can be guided, the efficiency of the fan is improved, and the noise of the fan is reduced. When the air flow does not need to be guided, the driving device 4 can drive the liftable guide plate 3 to ascend outside the volute 1, as shown in FIG. 3, so that the liftable guide plate 3 does not interfere with the flow direction of the air flow in the air outlet channel 5. Figure 2 Figure 3

[0067] For example, when the fan 01 is applied to an extractor hood, the liftable guide plate 3 can be driven to descend into the air outlet channel 5 when the air outlet resistance of the fan 01 is large, so that the air flow can be guided, the efficiency of the fan is improved, and the noise of the air outlet is reduced. When the resistance of the air outlet of the fan 01 is small, the liftable guide plate 3 is driven to ascend outside the volute 1, so that the liftable guide plate 3 does not reduce the efficiency of the fan 01 when the air volume is small.

[0068] The fan provided by the embodiment of the present application is provided with a liftable guide plate and a driving device, so that when the air flow in the fan needs to be guided, the liftable guide plate can be driven by the driving device to descend into the air outlet channel between the volute and the fan body, the air outlet flow can be guided, the efficiency of the fan is improved, and the noise of the air outlet is reduced. When the air flow in the fan does not need to be guided, the liftable guide plate can be driven by the driving device to ascend outside the volute, the problem that the liftable guide plate reduces the efficiency of the fan when the air volume is small can be avoided, and dynamic control of the guide plate in the fan is realized.

[0069] Optionally, Figure 3 is a structural diagram of the liftable guide plate provided by the embodiment of the present application, as shown in FIG. 4. Figure 3 ​​As shown, the driving device 4 comprises a driving motor 41 and a screw rod 42; the liftable baffle 3 comprises a threaded groove 31, which is adapted to the screw rod 42 and the thread of the threaded groove 31 is adapted to the thread of the screw rod 42; one end of the screw rod 42 is fixedly connected with the driving motor 41; at least part of the screw rod 42 is located in the threaded groove 31 on the side away from the driving motor 41; the screw rod 42 rotates under the driving of the driving motor 41.

[0070] Specifically, the inner diameter of the threaded groove 31 should be the same as the diameter of the screw rod 42, that is, the threaded groove 31 is adapted to the screw rod 42, so that the screw rod 42 can just pass through the threaded groove 31 to fix the liftable baffle 3. When the screw rod 42 rotates, the liftable baffle 3 can descend in the direction away from the screw rod 42, or the liftable baffle 3 can ascend in the direction close to the driving motor 41. For example, when the driving motor 41 rotates forward, it drives the screw rod 42 to rotate forward, at this time the liftable baffle 3 can descend in the direction away from the screw rod 42. When the driving motor 41 reverses, it drives the screw rod 42 to reverse, at this time the liftable baffle 3 can ascend in the direction close to the driving motor 41. In this way, the driving of the liftable baffle 3 ascending or descending can be realized.

[0071] Among them, the length of the screw rod 42 should be at least greater than the height between the driving motor 41 and the volute 1, so that the length of the screw rod 42 is long enough to avoid the liftable baffle 3 from completely separating from the screw rod 42 when it descends into the air outlet channel 5.

[0072] Optionally, in combination with reference to Figure 1 , Figure 2 and Figure 3 , the fan 01 further comprises a smooth guide rod 6, and the liftable baffle 3 further comprises a fixing groove 32; the extension direction of the fixing groove 32 is parallel to the extension direction of the threaded groove 31, and the fixing groove 32 is adapted to the smooth guide rod; at least part of the smooth guide rod 6 is accommodated in the fixing groove 32.

[0073] Specifically, when the liftable baffle 3 ascends or descends under the rotation of the screw rod 42, due to the rotating action of the screw rod 42, the liftable baffle 3 may appear rotating motion with the screw rod 42 as the rotating shaft and consistent with the rotating direction of the screw rod 42, and when rotating in the volute 1, it will make one end of the liftable baffle 3 away from the volute 1, or even in contact with the volute 1, and the other end away from the fan body 2, or even in contact with each other, which will greatly reduce the flowable space of the air outlet channel 5, causing the problem of blocking air flow. The liftable baffle 3 is provided with the fixing groove 32, and at least part of the smooth guide rod 6 is accommodated in the fixing groove 32, which can make the liftable baffle 3 only have position movement of ascending or descending, and will not have transverse swing in the air outlet channel 5, playing a role in fixing the liftable baffle 3.

[0074] The length of the smooth guide rod 6 should also be long enough to avoid the liftable deflector 3 from being completely separated from the smooth guide rod 6 when the liftable deflector 3 is lowered into the air outlet channel 5. For example, the length of the smooth guide rod 6 can be greater than or equal to the length of the screw rod 42.

[0075] In addition, the fixed groove 32 and the threaded groove 31 can have a certain distance therebetween to achieve better fixing effect.

[0076] Based on the same inventive concept, the application also provides an extractor hood, Figure 4 is a structural schematic diagram of an extractor hood provided by the application, as Figure 4 shown, the extractor hood comprises an air outlet cover mounting structure 100, a smoke collecting system 200 and a connecting pipe 300; one end of the connecting pipe 300 is connected with an air inlet pipe of the air outlet cover mounting structure 100, and the other end of the connecting pipe 300 is connected with an air outlet pipe of the smoke collecting system 200; the air outlet cover mounting structure 100 comprises the fan 01 provided by any of the embodiments of the application, so the extractor hood provided by the embodiments of the application comprises the technical features of the fan provided by any of the embodiments of the application, and can achieve the beneficial effects of the fan provided by any of the embodiments of the application; the same parts can refer to the above description of the fan provided by the embodiments of the application, and will not be described here.

[0077] Specifically, the smoke collecting system 200 is arranged indoors, i.e. in a kitchen, and is usually located above a cooking appliance; one end of the connecting pipe 300 is connected with the air inlet pipe of the air outlet cover mounting structure 100, and the other end of the connecting pipe 300 is connected with the air outlet pipe of the smoke collecting system 200, so that the air outlet cover mounting structure 100 and the smoke collecting system 200 are connected in communication through the connecting pipe 300; the fan 01 can generate negative pressure when operating, and the negative pressure can make the oil fume sequentially pass through the smoke collecting system 200, the connecting pipe 300 and the air outlet cover mounting structure 100 and then be discharged to the outdoor.

[0078] Figure 5 is a structural schematic diagram of another extractor hood provided by the application, which is combined with reference to Figure 4 and Figure 5The air outlet cover mounting structure 100 comprises an air outlet cover 110, a box body 120, and a fan 01 arranged in the box body 120. The fan 01 comprises a volute 1 and a fan body 2 arranged in the volute 1. The volute 1 is provided with a fan air inlet and a fan air outlet (not shown in the figure). The volute 1 and the fan body 2 form an air outlet channel 5. The fan 01 is horizontally arranged in the box body 120, i.e. the fan air inlet of the fan 01 faces downward, so as to be communicated with the connecting pipe 300, so that the oil fume gas flows to the fan air inlet through the connecting pipe 300. The fan air outlet is communicated with an air outlet 121 of the box body 120. The air outlet cover 110 is arranged at the air outlet 121 of the box body 120. The air outlet cover 110 connects the box body 120 with an exhaust pipe (not shown in the figure). The exhaust pipe is communicated with the external environment. The air outlet cover 110 can play a role of air gathering and flow guiding.

[0079] Optionally, referring to Figure 4 , the air outlet cover mounting structure 100 comprises a top plate 122. The top plate 122 is arranged on a side of the fan 01 away from the fan air inlet. When the driving device 4 comprises a driving motor 41 and a lead screw 42, the driving motor 41 is fixed to the top plate 122.

[0080] Specifically, the top plate 122 can be understood as a box plate arranged on a side of the box body 120 away from the connecting pipe 300. The top plate 122 is arranged above the fan 01. The driving motor 41 can be fixedly connected to the top plate 122. In this way, the position of the driving motor 41 and the lead screw 42 fixedly connected to the driving motor 41 can be fixed. When the driving motor 41 drives the lead screw 42 to rotate, it can be ensured that only the liftable flow guide plate 3 has a position movement.

[0081] Optionally, continuing to refer to Figure 4 , when the fan comprises the smooth guide rod 6, a side of the smooth guide rod 6 away from the liftable flow guide plate 3 is fixed to the top plate 122. In this way, the position of the smooth guide rod 6 can be fixed, so as to limit the liftable flow guide plate 3 from rotating in the air outlet channel 5 with the lead screw 42 as the rotating shaft.

[0082] Specifically, when it is needed to guide the air flow in the fan, the driving motor 41 drives the lead screw 42 to rotate, so that the liftable flow guide plate 3 is lowered to the air outlet channel between the volute 1 and the fan body 2 in a direction away from the lead screw 42 (as shown in Figure 5 ). In this way, the air flow can be guided, the efficiency of the fan can be improved, and the air outlet noise can be reduced. Figure 6 is another structural schematic diagram of the range hood provided by the embodiment of the present application. As shown in Figure 6 , when it is not needed to guide the air flow in the fan, the driving motor 41 drives the lead screw 42 to rotate in the opposite direction, so that the liftable flow guide plate 3 is raised to the outside of the volute 1 in a direction close to the driving motor 41. In this way, the problem that the efficiency of the fan is reduced when the liftable flow guide plate 3 is arranged in the air outlet channel when the air volume is small can be avoided.

[0083] Based on the same inventive concept, the embodiment of the present application also provides a control method of a fan, which is used for controlling the fan provided by any of the embodiments of the present application. The control method of the fan can be executed by the control device of the fan provided by the embodiment of the present application. The control device of the fan can be realized by software and / or hardware. The control device of the fan can be integrated into a fan controller. The fan controller can be arranged in the range hood provided by any of the embodiments of the present application.

[0084] Figure 7 is a flow chart of the control method of the fan provided by the embodiment of the present application, as shown in Figure 7 The control method of the fan includes the following steps.

[0085] S110, continuously acquiring the outflow resistance at the outlet position of the fan and the position information of the liftable guide vane.

[0086] Specifically, the size of the outflow resistance at the outlet position of the fan can be acquired by a pressure sensor. The position information of the liftable guide vane can be acquired by a displacement sensor. Alternatively, the current rotation angle of the rotor of the driving motor can be acquired by an angle sensor of the motor. The position information of the liftable guide vane can be acquired according to the rotation angle. During the operation of the fan, the outflow resistance at the outlet position of the fan and the position information of the liftable guide vane can be continuously acquired.

[0087] S120, judging whether the outflow resistance is greater than a preset resistance. If yes, step S130 is executed.

[0088] S130, judging whether the liftable guide vane is driven to descend according to the position information. If yes, step S140 is executed.

[0089] Specifically, the size of the preset resistance can be set according to design requirements. The embodiment of the present application does not make specific limitation on this. For example, when the outflow resistance is large, the efficiency of the fan is reduced. Therefore, the preset resistance can be determined according to the relationship between the outflow efficiency and the outflow resistance. When the outflow resistance is greater than the preset resistance, it can be determined that the efficiency of the fan is low at this time. Therefore, the liftable guide vane should be located in the outflow passage to guide the airflow at this time. Therefore, after it is determined that the outflow resistance is greater than the preset resistance, it can be firstly judged whether the liftable guide vane is located in the outflow passage according to the current position information. If the liftable guide vane is not located in the outflow passage, the liftable guide vane should be driven to descend into the outflow passage.

[0090] S140, outputting a first control signal to the driving device to control the driving device to drive the liftable guide vane to descend into the outflow passage. Step S110 is executed again.

[0091] Specifically, when it is determined that the liftable guide vane needs to be driven to descend, a first control signal is output to the driving device, so that the driving device drives the liftable guide vane to move in a direction away from the lead screw until the liftable guide vane descends into the air outlet passage. In this way, the liftable guide vane can guide the air flow when the air outlet resistance of the fan is large, so as to effectively improve the fan efficiency and reduce the air outlet noise.

[0092] The control method of the fan provided in the embodiment of the application continuously acquires the air outlet resistance at the air outlet position of the fan and the position information of the liftable guide vane during the operation of the fan, judges whether the current air outlet resistance is greater than a preset resistance, judges whether the liftable guide vane needs to be driven to descend according to the position information when the air outlet resistance is greater than the preset resistance, and outputs a first control signal to the driving device to drive the liftable guide vane to descend into the air outlet passage if the liftable guide vane needs to be controlled to descend. In this way, the liftable guide vane can guide the air flow in the air outlet passage when the air outlet resistance is large, so as to effectively improve the fan efficiency and reduce the air outlet noise, and the dynamic control of the guide vane in the fan is realized.

[0093] Optionally, Figure 8 is a flow chart of another control method of a fan provided in the embodiment of the application, as shown in Figure 8 The control method of the fan comprises the following steps.

[0094] S210, continuously acquiring the air outlet resistance at the air outlet position of the fan and the position information of the liftable guide vane.

[0095] S220, judging whether the air outlet resistance is greater than a preset resistance; if yes, executing step S230; if no, executing step S250.

[0096] S230, judging whether the liftable guide vane needs to be driven to descend according to the position information; if yes, executing step S240; if no, executing step S270.

[0097] S240, outputting a first control signal to the driving device to control the driving device to drive the liftable guide vane to descend into the air outlet passage; returning to execute step S210.

[0098] S250, judging whether the liftable guide vane needs to be driven to ascend according to the position information; if yes, executing step S260; if no, executing step S270.

[0099] Specifically, if the air outlet resistance is not greater than the preset resistance, it can be determined that the gas in the air outlet passage does not need to be guided at this time, and the liftable guide vane should be located outside the volute at this time. Therefore, after it is determined that the air outlet resistance is not greater than the preset resistance, the liftable guide vane can be first judged to be located in the air outlet passage according to the current position information, and the liftable guide vane should be driven to ascend to the outside of the volute if it is located in the air outlet passage.

[0100] S260, outputting the second control signal to the driving device to control the driving device to drive the liftable guide vane to rise to the outside of the volute; returning to execute step S210.

[0101] Specifically, when it is determined that the liftable guide vane needs to be driven to rise, the second control signal can be outputted to the driving device, so that the driving device drives the liftable guide vane to move in the direction close to the driving motor until the liftable guide vane rises to the outside of the volute, which can avoid that the liftable guide vane is located in the air outlet passage when the air volume is small, thereby reducing the efficiency of the fan.

[0102] S270, stopping outputting the first control signal and the second control signal to the driving device; returning to execute step S210.

[0103] Specifically, if the air outlet resistance is greater than the preset resistance, and it is determined according to the position information that the liftable guide vane is located in the air outlet passage, the liftable guide vane does not need to be driven to move, and at this time, the output of the control signal to the driving device can be stopped, that is, the output of the first control signal and the second control signal is stopped. Similarly, if the air outlet resistance is not greater than the preset resistance, and it is determined according to the position information that the liftable guide vane is located outside the volute, the liftable guide vane does not need to be driven to move, and at this time, the output of the control signal to the driving device can be stopped, that is, the output of the first control signal and the second control signal is stopped.

[0104] Optionally, Figure 9 is a flow chart of another control method of a fan provided by an embodiment of the present application, as shown in the figure, the control method of the fan comprises the following steps: Figure 9

[0105] S311, continuously acquiring the gear signal of the fan.

[0106] S312, judging whether the running gear of the fan is a preset gear according to the gear signal; if yes, executing step S314; if no, executing step S313.

[0107] S313, acquiring the position information of the liftable guide vane; executing step S318.

[0108] ​Specifically, before the air outlet resistance at the air outlet position of the fan and the position information of the liftable guide vane are acquired, the current gear signal of the fan can be acquired first, and the current running gear of the fan is determined according to the current gear signal of the fan. If the running gear is a higher gear, for example, a strong gear or a stir-fry gear, it indicates that the fan speed is fast at this time, and the air outlet resistance may reach the preset resistance, so the air outlet resistance at the air outlet position of the fan and the position information of the liftable guide vane can be further acquired at this time. If the running gear is a lower gear, for example, a weak gear or a standby state, it indicates that the fan speed is low at this time, and the air outlet resistance is also small, so only the position information of the liftable guide vane can be acquired at this time, to determine whether the liftable guide vane is in the air outlet channel according to the current position information. If it is in the air outlet channel, the liftable guide vane is lifted outside the volute, and if it is outside the volute, the output of the control signal is stopped, that is, the output of the first control signal and the second control signal is stopped. The preset gear can be a strong gear and a stir-fry gear.

[0109] S314, the air outlet resistance at the air outlet position of the fan and the position information of the liftable guide vane are continuously acquired.

[0110] S315, it is judged whether the air outlet resistance is greater than the preset resistance; if yes, step S316 is executed; if no, step S318 is executed.

[0111] S316, it is judged whether the liftable guide vane is driven to descend according to the position information; if yes, step S317 is executed; if no, step S320 is executed.

[0112] S317, the first control signal is output to the driving device to control the driving device to drive the liftable guide vane to descend into the air outlet channel.

[0113] S318, it is judged whether the liftable guide vane is driven to ascend according to the position information; if yes, step S319 is executed; if no, step S320 is executed.

[0114] S319, the second control signal is output to the driving device to control the driving device to drive the liftable guide vane to ascend outside the volute.

[0115] S320, the first control signal and the second control signal are stopped to be output to the driving device.

[0116] For example, in the embodiment of the application, after the liftable guide vane is lowered into the air outlet channel by outputting the first control signal to the driving device, after the liftable guide vane is lifted outside the volute by outputting the second control signal to the driving device, and when the output of the control signal to the driving device is stopped, the step of acquiring the current gear signal of the fan can be returned to be executed, so that the control program can be simplified and the fan control efficiency can be improved.

[0117] Based on the same inventive concept, the embodiment of the present application further provides a fan control device for executing the fan control method provided by any of the embodiments of the present application, which can be realized by software and / or hardware, and can be integrated into a fan controller, and the fan controller can be arranged in the range hood provided by any of the embodiments of the present application, so that the fan control device provided by the embodiment of the present application comprises the technical features of the fan control method provided by any of the embodiments of the present application, and can achieve the beneficial effects of the fan control method provided by any of the embodiments of the present application, and the same parts can be referred to the above description of the fan control method provided by the embodiment of the present application, which will not be repeated here.

[0118] Figure 10 is a structural schematic diagram of a fan control device provided by the embodiment of the present application, as shown in Figure 10 the control device comprises: a comprehensive information acquisition module 1000 for continuously acquiring the outflow resistance at the outlet position of the fan and the position information of the liftable guide vane; a resistance judgment module 2000 for judging whether the outflow resistance is greater than a preset resistance; a lowering control judgment module 3000 for judging whether to drive the liftable guide vane to lower according to the position information when the resistance judgment module 2000 determines that the outflow resistance is greater than the preset resistance; and a first output and circulation control module 4000 for outputting a first control signal to the driving device to control the driving device to drive the liftable guide vane to lower into the outflow passage when the lowering control judgment module 3000 determines to drive the liftable guide vane to lower according to the position information, and returning to the comprehensive information acquisition module 1000 to continuously acquire the outflow resistance at the outlet position of the fan and the position information of the liftable guide vane.

[0119] The fan control device provided by the embodiment of the present application can make the liftable guide vane guide the airflow in the outflow passage when the outflow resistance is large, which can effectively improve the fan efficiency, reduce the outflow noise, and realize the dynamic control of the guide vane in the fan.

[0120] Optionally, Figure 11 is a structural schematic diagram of another fan control device provided by the embodiment of the present application, as shown in Figure 11As shown, the control device of the fan further comprises a lifting control judging module 5000, configured to determine whether to drive the liftable guide vane to lift according to the position information when the resistance judging module 2000 determines that the air resistance is not greater than the preset resistance; a second output and circulation control module 6000, configured to output a second control signal to the driving device to control the driving device to drive the liftable guide vane to lift to the outside of the volute when the lifting control judging module 5000 determines to drive the liftable guide vane to lift according to the position information; and return to the comprehensive information acquisition module 1000 to execute the step of continuously acquiring the air resistance at the air outlet position of the fan and the position information of the liftable guide vane.

[0121] Optionally, Figure 12 is another structural schematic diagram of a control device of a fan provided by an embodiment of the present application, as shown in Figure 12 As shown, the control device of the fan further comprises a third output and circulation control module 7000, configured to stop outputting the first control signal and the second control signal to the driving device when the lowering control judging module 3000 determines not to drive the liftable guide vane to lower; and return to the comprehensive information acquisition module 1000 to execute the step of continuously acquiring the air resistance at the air outlet position of the fan and the position information of the liftable guide vane.

[0122] Optionally, referring to Figure 12 , the third output and circulation control module 7000 is further configured to stop outputting the first control signal and the second control signal to the driving device when the lifting control judging module 5000 determines not to drive the liftable guide vane to lift; and return to the comprehensive information acquisition module 1000 to execute the step of continuously acquiring the air resistance at the air outlet position of the fan and the position information of the liftable guide vane.

[0123] Optionally, the control device of the fan further comprises a gear signal acquisition module, configured to continuously acquire a current gear signal of the fan before the comprehensive information acquisition module continuously acquires the air resistance at the air outlet position of the fan; a gear judging module, configured to determine whether the running gear of the fan is a preset gear according to the gear signal; the comprehensive information acquisition module is further configured to acquire the air resistance at the air outlet position of the fan and the position information of the liftable guide vane when it is determined that the running gear of the fan is the preset gear; a position information acquisition module, configured to acquire the position information of the liftable guide vane when the gear judging module determines that the running gear of the fan is not the preset gear; and the lifting control judging module is further configured to determine whether to drive the liftable guide vane to lift according to the position information after the position information acquisition module acquires the position information of the liftable guide vane.

[0124] It should be understood that the various forms of flow shown above can be used to reorder, add, or remove steps. For example, the steps recited in the present application can be performed in parallel, in series, or in a different order, as long as the desired results of the technical solutions of the present application can be achieved, which are not limited herein.

[0125] The above detailed description does not constitute a limitation on the protection scope of the present application. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A fan, characterized by, Comprise: The volute (1); Fan body (2), provided in the volute (1); Liftable guide vane (3); Drive device (4); The fan body (2) and the volute (1) form the air outlet channel (5) between; The liftable guide vane (3) is driven by the drive device (4) to drop into the air outlet channel (5), or driven by the drive device (4) to rise to the outside of the volute (1); Wherein, the circular fan body (2) and the volute (1) form the air outlet channel (5) is curved, the curvature radius of the liftable guide vane (3) and the curvature radius of the air outlet channel (5) are same; The drive device (4) comprises: drive motor (41) and screw rod (42); The liftable guide vane (3) comprises screw groove (31), the screw groove (31) is adapted to the screw rod (42), and the thread of the screw groove (31) is adapted to the thread of the screw rod (42); One end of the screw rod (42) is fixedly connected with the drive motor (41); The side away from the drive motor (41), at least part of the screw rod (42) is located in the screw groove (31); The screw rod (42) is rotated under the drive of the drive motor (41); The fan further comprises smooth guide rod (6); The liftable guide vane (3) further comprises fixed groove (32); The extension direction of the fixed groove (32) is parallel to the extension direction of the screw groove (31), and the fixed groove (32) is adapted to the smooth guide rod (6); At least part of the smooth guide rod (6) is contained in the fixed groove (32); It can make the liftable guide vane (3) only have the position movement of rising or falling, and will not have the transverse swing in the air outlet channel (5).

2. A range hood characterized by, Comprise: Air outlet cover mounting structure (100), smoke collecting system (200) and connecting pipe (300); One end of the connecting pipe (300) is connected with the air inlet pipe of the air outlet cover mounting structure (100), and the other end of the connecting pipe (300) is connected with the air outlet pipe of the smoke collecting system (200); The air outlet cover mounting structure (100) comprises the fan (01) of claim 1.

3. The hood according to claim 2, characterized in that, The air outlet cover mounting structure (100) comprises a top plate (122); The top plate (122) is located on the side of the fan away from the air inlet; When the drive device (4) comprises drive motor (41) and screw rod (42), the drive motor (41) is fixed on the top plate (122).

4. The hood according to claim 3, characterized in that, When the fan (01) comprises smooth guide rod (6), the side away from the liftable guide vane (3) of the smooth guide rod (6) is fixed on the top plate (122).

5. A control method of a blower for controlling the blower according to claim 1, characterized by Comprise: Continuously acquire the air outlet resistance at the air outlet position of the fan and the position information of the liftable guide vane; Determine whether the air outlet resistance is greater than the preset resistance; If yes, determine whether to drive the liftable guide vane to drop according to the position information; If yes, output a first control signal to the driving device to control the driving device to drive the liftable guide vane to descend into the air outlet passage; And return to execute the step of continuously acquiring the air outlet resistance at the air outlet position of the fan and the position information of the liftable guide vane.

6. The control method of a blower according to claim 5, wherein Further comprising: If it is determined that the air outlet resistance is not greater than the preset resistance, determine whether to drive the liftable guide vane to ascend according to the position information; If yes, output a second control signal to the driving device to control the driving device to drive the liftable guide vane to ascend outside the volute; And return to execute the step of continuously acquiring the air outlet resistance at the air outlet position of the fan and the position information of the liftable guide vane.

7. The control method of a ventilator according to claim 5, wherein Further comprising: If it is determined that the air outlet resistance is not greater than the preset resistance, determine whether to drive the liftable guide vane to ascend according to the position information; If yes, output a second control signal to the driving device to control the driving device to drive the liftable guide vane to ascend outside the volute; 8. The control method of a ventilator according to claim 6, characterized by, And return to execute the step of continuously acquiring the air outlet resistance at the air outlet position of the fan and the position information of the liftable guide vane. Further comprising: If it is determined that the air outlet resistance is not greater than the preset resistance, determine whether to drive the liftable guide vane to ascend according to the position information; 9. The control method of a ventilator according to claim 6, wherein If yes, output a second control signal to the driving device to control the driving device to drive the liftable guide vane to ascend outside the volute; And return to execute the step of continuously acquiring the air outlet resistance at the air outlet position of the fan and the position information of the liftable guide vane. Before continuously acquiring the air outlet resistance at the air outlet position of the fan, further comprising: Continuously acquire a current gear signal of the fan; Determine whether the running gear of the fan is a preset gear according to the gear signal; If yes, acquire the air outlet resistance at the air outlet position of the fan and the position information of the liftable guide vane; If no, only acquire the position information of the liftable guide vane, and execute the step of determining whether to drive the liftable guide vane to ascend according to the position information.

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