CN111189085B - Range hood and control method thereof - Google Patents
Range hood and control method thereof Download PDFInfo
- Publication number
- CN111189085B CN111189085B CN202010006621.6A CN202010006621A CN111189085B CN 111189085 B CN111189085 B CN 111189085B CN 202010006621 A CN202010006621 A CN 202010006621A CN 111189085 B CN111189085 B CN 111189085B
- Authority
- CN
- China
- Prior art keywords
- range hood
- guide plate
- circuit
- side wall
- fan
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
- F24C15/00—Details
- F24C15/20—Removing cooking fumes
- F24C15/2021—Arrangement or mounting of control or safety systems
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/44—Fluid-guiding means, e.g. diffusers
- F04D29/441—Fluid-guiding means, e.g. diffusers especially adapted for elastic fluid pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
- F04D29/663—Sound attenuation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
- F04D29/667—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps by influencing the flow pattern, e.g. suppression of turbulence
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/68—Combating cavitation, whirls, noise, vibration or the like; Balancing by influencing boundary layers
- F04D29/681—Combating cavitation, whirls, noise, vibration or the like; Balancing by influencing boundary layers especially adapted for elastic fluid pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
- F24C15/00—Details
- F24C15/20—Removing cooking fumes
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Ventilation (AREA)
Abstract
The invention discloses a range hood, which comprises a smoke inlet assembly, a fan frame arranged above the smoke inlet assembly, a fan system arranged in the fan frame, two guide vanes and a guide plate, wherein the fan system is provided with a main air inlet facing backwards and an auxiliary air inlet facing forwards, the guide vanes and the guide plate are arranged in the fan frame, the two guide vanes extend in the front-back direction and are respectively arranged below the left side and the right side of the fan system, each guide vane is gradually inclined downwards from front to back, the guide plate is arranged at the rear side of the fan system and is close to the top, and the guide plate extends in the left-right direction and is gradually inclined downwards from front to back. The control method of the range hood is further disclosed. Compared with the prior art, the invention has the advantages that: through the cooperation of water conservancy diversion piece and guide plate, can carry out the rectification to the boundary layer separation of inside swirl of range hood and air current for the impeller of fan system receives the air current and strikes comparatively evenly.
Description
Technical Field
The invention relates to an oil fume purification device, in particular to a range hood and a control method of the range hood.
Background
The range hood is one of the essential kitchen equipment in modern family, and the range hood utilizes fluid dynamics principle to carry out work, inhales and discharges the oil smoke through the centrifugal fan who installs inside the range hood to use filter screen filtration part grease granule. The centrifugal fan comprises a volute, an impeller arranged in the volute and a motor driving the impeller to rotate. When the impeller rotates, negative pressure suction is generated in the center of the fan, oil smoke below the range hood is sucked into the fan, accelerated by the fan and then collected and guided by the volute to be discharged out of a room.
Common range hoods are roughly divided into top suction, side suction and low suction. Common products in the current market are top suction and side suction, and the low range hood is a new product in the market. The characteristic is that the distance between the suction inlet and the hearth is 380-.
At present, the following measures are adopted in the industry for internal flow stabilization and noise reduction:
(1) a fan system is reasonably placed, and the single-suction, double-suction and inclined placement are realized;
(2) and a mode of punching holes on the wall surface and sound absorbing cotton is adopted in the area with higher air flow speed.
However, there are the following problems: the low-suction range hood has a long and narrow suction inlet, airflow from the suction inlet to a fan box body generates diffusion loss and unstable turbulence, the impeller is periodically impacted by the unstable turbulence, and the fluctuation of the rotating speed of a motor of the fan is large, so that the range hood generates a gear jump condition under the condition of back pressure systems of users on different floors. And the problems of abnormal sound and unstable motor rotating speed cannot be completely solved by adopting an optimized fan system.
Disclosure of Invention
The first technical problem to be solved by the invention is to provide a range hood, which can stabilize and rectify the internal flow and improve the oil smoke absorption effect, aiming at the defects in the prior art.
The second technical problem to be solved by the present invention is to provide a control method for the above range hood.
The technical scheme adopted by the invention for solving the first technical problem is as follows: the utility model provides a range hood, is advancing the fan frame of cigarette subassembly top and the fan system of setting in the fan frame including advancing cigarette subassembly, setting, the fan system has main air intake backward and vice air intake forward, its characterized in that: the range hood further comprises flow deflectors and flow deflectors which are arranged in the fan frame, the flow deflectors are provided with two flow deflectors which extend in the front-back direction and are respectively arranged below the left side and the right side of the fan system, each flow deflector is gradually inclined downwards from front to back, the flow deflectors are arranged at the rear side of the fan system and are close to the top, and the flow deflectors extend in the left-right direction and are gradually inclined downwards from front to back.
In order to reduce noise conveniently, the flow deflector comprises a hollow box body, and a first noise reduction hole is formed in the bottom surface of the box body.
Preferably, in order to reduce low-frequency and high-frequency noise, sound-absorbing cotton is arranged in the box body.
In order to further reduce noise, the guide plate is of a hollow structure, and a second noise reduction hole is formed in the bottom surface of the guide plate. Preferably, in order to reduce low-frequency and high-frequency noise, sound-absorbing cotton is arranged in the flow guide plate.
Preferably, the smoke inlet assembly and the air rack are structurally characterized in that the flow deflector is convenient to play a role in guiding oil, the smoke inlet assembly comprises a first front side wall and a first rear side wall, an air inlet is formed in the first front side wall, and a first air inlet channel is formed between the first front side wall and the first rear side wall; the fan frame comprises a second front side wall and a second rear side wall, the second front side wall is positioned in front of the first front side wall, a second air inlet channel is formed between the rear side of the fan system and the second rear side wall of the fan frame, and the first air inlet channel and the second air inlet channel are communicated with the fan system; a certain gap is formed between the rear end of the flow deflector and the second rear side wall of the fan frame.
Preferably, in order to avoid the fluctuation phenomenon of the rotating speed of the range hood, the range hood for users on different floors can be ensured to stably operate without jumping under the condition of no loss of air volume, and the width of the flow deflector is 30-48 mm.
In order to adapt to different working conditions, the wind deflector further comprises a rotating shaft and a rotating motor, wherein one end of the left guide plate and the right guide plate is rotatably connected with the corresponding position of the fan frame through the rotating shaft, the other end of the left guide plate and the right guide plate are connected with an output shaft of the rotating motor, the rotating motor is fixed in the fan frame, and the rotating shaft extends in the left direction and the right direction.
For the automatic control rotating electrical machines, still include control circuit for being convenient for, control circuit is including the rotating electrical machines control circuit who is used for detecting the motor speed's of fan system rotational speed monitoring circuit, regulation loop, feedback circuit, judges the circuit and is used for controlling rotating electrical machines, rotating speed monitoring circuit is connected with feedback circuit's input, regulation loop is connected with feedback circuit's input, feedback circuit's output is connected with the input of judging the circuit, the output of judging the circuit is connected with rotating electrical machines control circuit's input.
The technical scheme adopted by the invention for solving the second technical problem is as follows: a control method of the range hood is characterized in that:
the range hood begins to work, and the current rotational speed of motor that rotational speed monitoring circuit surveyed is Ni to feedback the detected value to the judgement circuit and carry out the logic judgement:
1) when Ni is less than or equal to Npmin, the judging circuit controls the guide plate to adjust the inclination angle theta between the guide plate and the horizontal direction through the rotating motor control circuit1＝30°～40°；
2) When Ni is larger than or equal to Npmax, the judgment circuit controls the guide plate to adjust the inclination angle between the guide plate and the horizontal direction to be theta through the rotating motor control circuit2＝50°～60°；
3) When Npmax is more than Ni and more than Npmin, judging that the inclination angle between the guide plate and the horizontal direction is theta by controlling the control circuit of the rotating motor3＝40°～50°；
Where Npmin is the rotation speed of the preset low flow condition operation, and Npmax is the rotation speed of the preset high flow condition operation.
Compared with the prior art, the invention has the advantages that: the guide vane is arranged below the fan system, the guide plate is arranged on the rear side of the top of the fan system, and the guide vane and the guide plate are matched to control and rectify the separation of a vortex in the range hood and a boundary layer of airflow, so that the impeller of the fan system is uniformly impacted by the airflow, the impact noise of the airflow is reduced, and the load borne by the motor is stable, thereby preventing the range hood from jumping when the range hood operates at different gears, and ensuring good oil smoke absorption effect when a user uses the range hood under the condition of different back pressures at the outlet of the range hood; through setting up the rotating electrical machines who is used for driving guide plate pivoted to and the control circuit who controls rotating electrical machines, can adapt to different operating modes automatically, work in the most suitable position, play the best stationary flow and fall the effect of making an uproar.
Drawings
FIG. 1 is a schematic view of a range hood according to an embodiment of the present invention;
fig. 2 is a sectional view (left-right direction section) of the range hood according to the embodiment of the present invention;
fig. 3 is a sectional view (front-rear direction section) of the range hood according to the embodiment of the present invention;
fig. 4 is a schematic view of a flow deflector of the range hood according to the embodiment of the present invention;
fig. 5 is a sectional view of a flow deflector of the range hood according to the embodiment of the present invention;
fig. 6 is a schematic view of a deflector of the range hood according to the embodiment of the present invention;
FIG. 7 is a graph of performance curves for a range hood according to an embodiment of the present invention;
FIG. 8 is a block diagram of a control circuit of the range hood according to the embodiment of the present invention;
fig. 9 is a control flowchart of the range hood according to the embodiment of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar functions.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present invention and to simplify the description, but are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and that the directional terms are used for purposes of illustration and are not to be construed as limiting, for example, because the disclosed embodiments of the present invention may be oriented in different directions, "lower" is not necessarily limited to a direction opposite to or coincident with the direction of gravity. Furthermore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.
Referring to fig. 1 to 3, a range hood, in this embodiment, a low-suction range hood, includes a smoke inlet assembly 1, a fan frame 2, and a fan system 3 disposed in the fan frame 2. The fan system 3 includes a volute 31, an impeller 32 disposed within the volute 31, and a motor 33 for driving the impeller 32.
Wherein, advance cigarette subassembly 1, it is the box of cavity form and open at the top, advance on the front side wall face of cigarette subassembly 1, the position that is close to the bottom seted up air intake 11. The smoke inlet module 1 is preferably flat (flat in the front-rear direction). The fan frame 2 is provided above the smoke intake unit 1, is hollow, and has a suction port 23 formed by opening at a position corresponding to the smoke intake unit 1 at the bottom end thereof.
The thickness (the dimension in the front-rear direction) of the fan frame 2 is larger than that of the smoke intake assembly 1. The smoke inlet assembly 1 comprises a first front side wall 12 and a first rear side wall 13, and the air inlet 11 is arranged on the first front side wall 12. The wind stand 2 includes a second front sidewall 21 and a second rear sidewall 22, and the first rear sidewall 12 may be flush with the second rear sidewall 22. The second front side wall 21 of the blower housing 2 is located in front of the first front side wall 12 of the smoke intake assembly 1. A first air inlet channel 14 is formed between the first front side wall 12 and the first rear side wall 13 of the smoke inlet component 1, and the air inlet 11 is communicated with the first air inlet channel 14. The fan system 3 is disposed in the fan frame 2, a second air intake channel 24 is formed between the rear side of the fan system 3 and the second rear side wall 22 of the fan frame 2, and the suction port 23 is located at the bottom end of the second air intake channel 24.
The fan system 3 is a double-intake air intake, wherein a primary air inlet 34 formed on the volute casing 31 faces backwards to form a back suction mode, and a secondary air inlet 35 also formed on the volute casing 31 faces forwards. Preferably, the rear side of the fan system 3 does not exceed the first front side wall 12 of the smoke intake assembly 1. The suction port 23 of the fan frame 2 and the area of the fan frame 2 below the fan system 3 constitute a sudden expansion area 25.
The oil smoke gas flow is divided into two parts of gas flow in the process of flowing from the air inlet 11 of the smoke inlet assembly 1 to the main air inlet 34 and the auxiliary air inlet 35 of the fan system 3, the main gas flow starts to branch in the sudden expansion area 25, the gas flow in the sudden expansion area 25 is turbulent, and particularly, the gas flow is shown on the front side and the rear side of the fan frame 2, and the gas flow at the boundary has serious boundary layer separation to generate gas flow impact noise. And along with the change of different air quantities of the range hood, the air quantities entering the main air inlet 34 at the back side and the auxiliary air inlet 35 at the front side of the fan system 3 are changed abnormally.
For this reason, a guide vane 4 and a guide vane 5 are also arranged in the fan frame 2. The guide vanes 4 are provided with two guide vanes, and are respectively arranged at the left side and the right side below the fan system 3. The front end of each guide vane 4 is connected to the bottom of the fan system 3 and extends gradually obliquely backwards and downwards to above the suction inlet 23. Preferably, it is inclined at an angle of 60 ° to the horizontal. The distance between the rear end of the guide vane 4 and the second rear side wall 22 of the fan frame 2 is 8-15 mm, so that oil is guided conveniently.
The flow deflector 4 rectifies and distributes the airflow at the boundary of the fan frame 2 in the sudden expansion area 25 through the reasonable structure and installation position design, so that the airflow at the back and the front air inlet is stable in flowing, the airflow impact on the impeller 32 of the fan system 3 is uniform, and the load on the motor 33 is stable. The motor 33 has stable rotating speed, can prevent the condition of gear jumping of the range hood when operating at different gears, and ensures good oil fume suction effect when a user uses the range hood under the condition of different backpressure at the outlet of the range hood. In addition, the guide vane 4 also has a good oil guiding function.
The baffle 4 includes a case 41, a first connecting portion 42 disposed at a front side of the case 41, and a second connecting portion 43 disposed below the case 41. The box body 41 is hollow, the first connecting portion 42 is used for being connected with the fan system 3, and the second connecting portion 43 is used for being connected with the fan frame 2. The box body 41 is hollow, a first noise reduction hole 44 is formed in the bottom surface (facing the oil fume flow surface) of the box body 41, and sound absorption cotton 45 is arranged in a cavity in the box body 41. Therefore, the air flow noise generated by the sudden expansion region 25 can be absorbed, and the low-frequency noise and the high-frequency noise have noise reduction effects, so that the noise reduction effect is achieved.
Under different operating conditions of the range hood, a turbulent flow region (vortex) appears in an inlet region of the main air inlet 34 at the back of the fan system 3, so that the guide plate 5 is arranged at the rear side of the fan system 3 and close to the top, and is matched with the guide plate 4 to stabilize the flow. The baffle 5 may be flat and extend in the left-right direction. Because the intensity and the scope distribution of different operating mode vortex district are different, in order to carry out the pertinence control of different operating modes to this vortex district, consequently need carry out flow control according to the angle of different operating mode adjustment guide plate 5. One end of the left and right of the guide plate 5 is rotatably connected with the corresponding position of the fan frame 2 through a rotating shaft 51, the other end is connected with an output shaft of a rotating motor 52, and the rotating motor 52 is fixed in the fan frame 2. Thus, the deflector 5 is driven by the rotating motor 52 to rotate, and the rotating shaft thereof is the rotating shaft 51 and extends in the left-right direction. The reasonable size and the installation position of the guide plate 5 can ensure that the range hood of users on different floors can stably run without jumping. The guide plate 5 can be made into a hollow structure, the second noise reduction hole 53 is formed in the bottom surface (facing the oil fume flowing surface) of the guide plate 5, and similarly, sound absorption cotton can be arranged in the guide plate 5 to ensure that the noise reduction effect is achieved on low-frequency and high-frequency noise. The matching of the flow deflector 4 and the flow deflector 5 plays the roles of improving the sound quality of the range hood and reducing noise. On the premise of not losing air volume, the noise of the laboratory is reduced by 1-2 dB.
The width (the size in the left-right direction) L2 of the guide vane 4 is 30-48 mm, when the width L2 of the guide vane 4 is less than 30mm and L2 is more than 45mm, the rotating speed of the range hood fluctuates, and the rotating speed fluctuation delta n is more than 20 rpm. The reasonable matching design of the width value of the guide vane 4 and the rotation angle theta of the guide vane 5 can ensure that the range hoods of users on different floors can stably run without jumping under the condition of not losing air volume.
Referring to fig. 3 to 6, in the present embodiment, preferably, the first noise reduction holes 44 of the baffle 4 have a hole diameter of 3mm, a hole pitch of 8mm, a hole plate thickness of 0.7mm, a cavity thickness of 6.4mm, a perforation rate of 11.8%, and a sound absorption cotton thickness of 3 mm. The guide vane 4 has a length (dimension in the front-rear direction) L1 of 125mm, an L2 of 34mm, and a total thickness of 8mm, and the second connection portion 43 connected to the fan frame 2 has a length S4 of 4.2mm, and the first connection portion 42 connected to the fan system 3 has a length S5 of 8.7 mm.
The aperture of the noise reduction hole of the guide plate 5 is 3mm, the hole interval is 8mm, the thickness of the hole plate is 0.7mm, the perforation rate is 10%, and the sound absorption cotton is 5 mm. The length L3 of the baffle 5 is 378mm, the depth L4 is 74mm, the height L5 is 63mm, and the initial position forms an angle of 35 ° with the horizontal direction.
When the guide vanes 4 and the guide vanes 5 are not arranged, the rotating speed change delta n of each working point is 20-30 rpm; after the guide vane 4 and the guide vane 5 are added, the rotating speed change delta n of each working condition point is less than 10 rpm. The performance curve of the range hood is almost unchanged with or without the guide vanes 4 and the guide plates 5, see fig. 7.
The low-suction range hood has a long and narrow smoke inlet assembly 1, airflow from an air inlet 11 of the smoke inlet assembly 1 to a fan frame 2 generates diffusion loss and unstable turbulence, the impeller 32 is periodically impacted by the unstable turbulence, and the fluctuation of the rotating speed of the motor 33 is large, so that the range hood generates gear jumping and abnormal sound under the conditions of back pressure systems of users on different floors. The low-suction range hood has different internal flow fields in small-flow, high-efficiency areas, working conditions and large-flow working conditions, and the noise of a laboratory and a kitchen is different. The targeted noise reduction measures are adopted for different working conditions of the low-suction range hood, the operating working condition range of the low-suction range hood is judged through the performance curve of the range hood according to the operating rotating speed Ni of the range hood, and the corresponding optimal steady flow and noise reduction effects are achieved by adjusting the inclination angle of the guide plate 5, so that the good experience of a user is guaranteed.
Referring to fig. 8, the control circuit includes a rotational speed monitoring circuit 61, a regulation loop 62, a feedback circuit 63, and a judgment circuit 64. The rotation speed monitoring circuit 61 may be an electromagnetic sensor, and is connected to an input end of the feedback circuit 63, and the feedback circuit 63 may be an amplifying circuit, which plays a role in enhancing the original input signal (rotation speed signal) and making the input signal enhanced or weakened. The electromagnetic sensor has a simple structure, is not influenced by vibration, temperature and dust, the detection gear is arranged on an output shaft of a motor 33 of the fan system 3, the sensor is close to the tooth tip of the gear, the gap between the sensor and the gear is 0.5-1mm, and a frequency signal proportional to the rotating speed is taken out. The advantages of using an electromagnetic sensor are as follows: 1. the structure is simple, the rigidity is good, the environment resistance is good, and the influence of vibration, temperature, oil dust and the like is avoided; 2. because the signal is detected in a non-contact way, the rotating body is not loaded, and the safety measurement can be realized; 3. because the self-generating type is not required to be powered, the power generation type is most suitable for being arranged on the site.
The regulation loop 62 is a potentiometer, connected to the input of the feedback circuit 63, and is used for pre-zeroing as a reference for the electromagnetic sensor. An output terminal of the feedback circuit 63 is connected to an input terminal of a judgment circuit 64, and an output terminal of the judgment circuit 64 is connected to an input terminal of a rotating electric machine control circuit 65 for controlling the rotating electric machine 52. The judgment circuit 64 is a logic circuit and functions as a circuit for performing logic operation.
The low flow operating condition Q shown in this embodimentmin＝8.5m3Min, large flow Qmax＝16m3Min, 8.5m working condition of high-efficiency zone3/min＜Qbep＜16m3And/min. Obtaining the rotating speeds of the range hood in the working conditions of small flow, large flow and high-efficiency area respectively as N according to the linear difference valuepmin＝、Npmax＝、＜Npbep<. Wherein Q ispbepThe range hood is indicated to operate in a high-efficiency flow range area; n is a radical ofpbepIs corresponding to QpbepLinear differential rotational speed over a range of flow rates. N is as defined abovepminAnd NpmaxIs a preset value.
Referring to fig. 9, when the range hood starts to work, the rotation speed monitoring circuit 61 (electromagnetic sensor) detects that the current rotation speed is Ni, and feeds the detection value back to the judging circuit 64 for logic judgment:
1) when Ni is less than or equal to Npmin, the judgment circuit 64 controls the guide plate 5 to adjust the inclination angle theta with the horizontal direction through the rotating motor control circuit 65130-40 °, θ is taken in this embodiment1Matching the current flow by 35 degrees to obtain the optimal steady flow and noise reduction effect;
2) when Ni is larger than or equal to Npmax, the judgment circuit 64 controls the guide plate 5 to adjust the inclination angle theta with the horizontal direction through the rotating motor control circuit 65250-60 degrees, in this example, θ is taken2At 55 deg. and adapted to current flow rate to obtain optimum steady flow sumNoise reduction effect;
3) when Npmax is more than Ni and more than Npmin, the judgment circuit 64 controls the guide plate 5 to adjust the inclination angle theta with the horizontal direction through the rotating motor control circuit 65340-50 deg., in this embodiment, θ is taken3And (4) matching the current flow by 45 degrees to obtain the optimal flow stabilization and noise reduction effects.
Claims (9)
1. The utility model provides a range hood, is advancing cigarette subassembly (1), setting up fan frame (2) and fan system (3) of setting in fan frame (2) advancing cigarette subassembly (1) top, fan system (3) have main air intake (34) backward and vice air intake (35) forward, its characterized in that: the range hood also comprises two flow deflectors (4) and two flow deflectors (5) which are arranged in the fan frame (2), wherein the two flow deflectors (4) extend in the front-back direction and are respectively arranged below the left side and the right side of the fan system (3), each flow deflector (4) gradually inclines downwards from front to back, the flow deflectors (5) are arranged at the rear side of the fan system (3) and close to the top, and the flow deflectors (5) extend in the left-right direction and gradually incline downwards from front to back; the range hood further comprises a rotating shaft (51) and a rotating motor (52) which are used as rotating shafts of the guide plates (5), wherein the left end and the right end of each guide plate (5) are rotatably connected with the corresponding position of the fan frame (2) through the rotating shaft (51), the other end of each guide plate is connected with an output shaft of the rotating motor (52), and the rotating shaft (51) extends in the left-right direction.
2. The range hood of claim 1, wherein: the flow deflector (4) comprises a hollow box body (41), and a first noise reduction hole (44) is formed in the bottom surface of the box body (41).
3. The range hood of claim 2, wherein: the box body (41) is internally provided with sound absorption cotton (45).
4. The range hood of claim 1, wherein: the guide plate (5) is of a hollow structure, and a second noise reduction hole (53) is formed in the bottom surface of the guide plate.
5. The range hood according to any one of claims 1 to 4, wherein: the smoke inlet assembly (1) comprises a first front side wall (12) and a first rear side wall (13), an air inlet (11) is formed in the first front side wall (12), and a first air inlet channel (14) is formed between the first front side wall (12) and the first rear side wall (13); the fan frame (2) comprises a second front side wall (21) and a second rear side wall (22), the second front side wall (21) is located in front of the first front side wall (12), a second air inlet channel (24) is formed between the rear side of the fan system (3) and the second rear side wall (22) of the fan frame (2), and the first air inlet channel (14) and the second air inlet channel (24) are communicated with the fan system (3); a certain gap is formed between the rear end of the flow deflector (4) and the second rear side wall (22) of the fan frame (2).
6. The range hood according to any one of claims 1 to 4, wherein: the width of the flow deflector (4) is 30-48 mm.
7. The range hood according to any one of claims 1 to 4, wherein: the rotating motor (52) is fixed in the fan frame (2).
8. The range hood of claim 7, wherein: still include control circuit, control circuit is including rotational speed monitoring circuit (61), regulation loop (62), feedback circuit (63), judgement circuit (64) that are used for detecting motor (33) the rotational speed of fan system (3) and be used for controlling rotating electrical machines control circuit (65) of rotating electrical machines (52), rotational speed monitoring circuit (61) are connected with feedback circuit (63)'s input, regulation loop (62) are connected with feedback circuit (63)'s input, feedback circuit (63)'s output is connected with judgement circuit (64)'s input, judgement circuit (64)'s output is connected with rotating electrical machines control circuit (65)'s input.
9. A control method of a range hood as claimed in claim 8, wherein:
the range hood starts to work, the current rotating speed of the motor (33) is measured to be Ni by the rotating speed monitoring circuit (61), and the detected value is fed back to the judging circuit (64) for logic judgment:
1) when Ni is less than or equal to Npmin, the judgment circuit (64) controls the guide plate (5) to adjust the inclination angle theta with the horizontal direction through the rotating motor control circuit (65)1＝30°～40°；
2) When Ni is larger than or equal to Npmax, the judgment circuit (64) controls the guide plate (5) to adjust the inclination angle theta with the horizontal direction through the rotating motor control circuit (65)2＝50°～60°；
3) When Npmax is more than Ni and more than Npmin, the judgment circuit (64) controls the guide plate (5) to adjust the inclination angle theta with the horizontal direction through the rotating motor control circuit (65)3＝40°～50°；
Where Npmin is the rotation speed of the preset low flow condition operation, and Npmax is the rotation speed of the preset high flow condition operation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010006621.6A CN111189085B (en) | 2020-01-03 | 2020-01-03 | Range hood and control method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010006621.6A CN111189085B (en) | 2020-01-03 | 2020-01-03 | Range hood and control method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111189085A CN111189085A (en) | 2020-05-22 |
| CN111189085B true CN111189085B (en) | 2022-03-18 |
Family
ID=70705979
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010006621.6A Active CN111189085B (en) | 2020-01-03 | 2020-01-03 | Range hood and control method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111189085B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111853891B (en) * | 2020-07-06 | 2022-01-21 | 宁波方太厨具有限公司 | Range hood and control method thereof |
| CN112484111B (en) * | 2020-11-16 | 2022-10-21 | 嵊州市浙江工业大学创新研究院 | Auxiliary air inlet system of integrated stove and control method |
| CN112856514A (en) * | 2021-01-11 | 2021-05-28 | 宁波方太厨具有限公司 | Range hood and control method thereof |
| CN113203111B (en) * | 2021-04-29 | 2022-10-21 | 宁波方太厨具有限公司 | Range hood and noise reduction control method thereof |
Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19744661A1 (en) * | 1997-10-09 | 1999-04-15 | Bernd Beck | Meal preparation unit |
| KR20110105739A (en) * | 2009-08-21 | 2011-09-27 | 유한회사 대동 | A range hood using swirler |
| CN203907715U (en) * | 2014-06-10 | 2014-10-29 | 樱花卫厨（中国）股份有限公司 | Air channel oil guide structure of range hood |
| CN206073203U (en) * | 2016-09-28 | 2017-04-05 | 宁波方太厨具有限公司 | Hood with liftable exhaust fume collecting kitchen hood |
| CN107965830A (en) * | 2018-01-22 | 2018-04-27 | 广东美的厨房电器制造有限公司 | A kind of range hood with double air intake structures |
| CN207674519U (en) * | 2017-11-10 | 2018-07-31 | 宁波方太厨具有限公司 | A kind of noise reduction guiding device and application have the range hood of the noise reduction guiding device |
| CN208169206U (en) * | 2018-01-31 | 2018-11-30 | 宁波方太厨具有限公司 | A kind of deflector and the blower for being equipped with the deflector |
| CN208269228U (en) * | 2018-01-24 | 2018-12-21 | 迅达科技集团股份有限公司 | Near-suction type oil smoke suction machine with diversion air duct |
| CN109681933A (en) * | 2017-10-18 | 2019-04-26 | 宁波方太厨具有限公司 | A kind of range hood |
| CN208920166U (en) * | 2018-09-27 | 2019-05-31 | 佛山市顺德区美的洗涤电器制造有限公司 | Range hood |
| CN208920159U (en) * | 2018-09-27 | 2019-05-31 | 佛山市顺德区美的洗涤电器制造有限公司 | Range hood |
| CN110094368A (en) * | 2018-01-31 | 2019-08-06 | 宁波方太厨具有限公司 | A kind of deflector and the blower for being equipped with the deflector |
| CN110319471A (en) * | 2019-07-19 | 2019-10-11 | 杭州德意电器股份有限公司 | A kind of water conservancy diversion treatment facilities and kitchen ventilator for kitchen ventilator and water conservancy diversion purification method |
-
2020
- 2020-01-03 CN CN202010006621.6A patent/CN111189085B/en active Active
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19744661A1 (en) * | 1997-10-09 | 1999-04-15 | Bernd Beck | Meal preparation unit |
| KR20110105739A (en) * | 2009-08-21 | 2011-09-27 | 유한회사 대동 | A range hood using swirler |
| CN203907715U (en) * | 2014-06-10 | 2014-10-29 | 樱花卫厨（中国）股份有限公司 | Air channel oil guide structure of range hood |
| CN206073203U (en) * | 2016-09-28 | 2017-04-05 | 宁波方太厨具有限公司 | Hood with liftable exhaust fume collecting kitchen hood |
| CN109681933A (en) * | 2017-10-18 | 2019-04-26 | 宁波方太厨具有限公司 | A kind of range hood |
| CN207674519U (en) * | 2017-11-10 | 2018-07-31 | 宁波方太厨具有限公司 | A kind of noise reduction guiding device and application have the range hood of the noise reduction guiding device |
| CN107965830A (en) * | 2018-01-22 | 2018-04-27 | 广东美的厨房电器制造有限公司 | A kind of range hood with double air intake structures |
| CN208269228U (en) * | 2018-01-24 | 2018-12-21 | 迅达科技集团股份有限公司 | Near-suction type oil smoke suction machine with diversion air duct |
| CN208169206U (en) * | 2018-01-31 | 2018-11-30 | 宁波方太厨具有限公司 | A kind of deflector and the blower for being equipped with the deflector |
| CN110094368A (en) * | 2018-01-31 | 2019-08-06 | 宁波方太厨具有限公司 | A kind of deflector and the blower for being equipped with the deflector |
| CN208920166U (en) * | 2018-09-27 | 2019-05-31 | 佛山市顺德区美的洗涤电器制造有限公司 | Range hood |
| CN208920159U (en) * | 2018-09-27 | 2019-05-31 | 佛山市顺德区美的洗涤电器制造有限公司 | Range hood |
| CN110319471A (en) * | 2019-07-19 | 2019-10-11 | 杭州德意电器股份有限公司 | A kind of water conservancy diversion treatment facilities and kitchen ventilator for kitchen ventilator and water conservancy diversion purification method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111189085A (en) | 2020-05-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111189085B (en) | Range hood and control method thereof | |
| CN111197780B (en) | Range hood and control method thereof | |
| CN212618543U (en) | Fume exhaust fan | |
| CN111023218B (en) | Range hood and control method thereof | |
| CN207080414U (en) | A kind of snail tongue structure for radial fan | |
| CN111336558B (en) | Air outlet hood, range hood applying air outlet hood and control method of range hood | |
| CN112344403A (en) | Oil smoke escape prevention structure and range hood with same | |
| CN112856514A (en) | Range hood and control method thereof | |
| CN112484114B (en) | Noise reduction device, range hood applying noise reduction device and control method of range hood | |
| CN111829032B (en) | Noise reduction device, range hood applying noise reduction device and control method of range hood | |
| CN216111362U (en) | Volute type energy-saving fan | |
| CN112253494B (en) | Fan system, range hood applying fan system and control method of range hood | |
| JP2011226407A (en) | Multi-blade fan, air conditioner, and guide member | |
| CN111322649B (en) | Fume exhaust fan | |
| CN210440279U (en) | Volute, centrifugal fan and air conditioner | |
| CN112377960A (en) | Range hood and control method | |
| KR100690695B1 (en) | Exhaust hood with flow guide | |
| CN205806008U (en) | A kind of lampblack absorber wind wheel assembly | |
| CN219572022U (en) | Range hood with air blocking curtain | |
| CN218522848U (en) | Stable volute structure for centrifugal fan | |
| CN111156559B (en) | Range hood and control method thereof | |
| CN219691821U (en) | Volute structure for centrifugal fan, centrifugal fan and range hood | |
| CN215001768U (en) | Volute structure and range hood | |
| CN219103087U (en) | Fume exhaust fan | |
| CN216346477U (en) | Thin type smoke machine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |