CN216790272U

CN216790272U - Fume exhaust fan

Info

Publication number: CN216790272U
Application number: CN202121434102.6U
Authority: CN
Inventors: 何立博
Original assignee: Ningbo Fotile Kitchen Ware Co Ltd
Current assignee: Ningbo Fotile Kitchen Ware Co Ltd
Priority date: 2021-06-25
Filing date: 2021-06-25
Publication date: 2022-06-21
Anticipated expiration: 2031-06-25

Abstract

The utility model discloses a range hood, which comprises an air inlet body and a smoke guide plate, wherein the front side of the air inlet body is opened to form an air inlet, and the range hood is characterized in that: the range hood also comprises a movement mechanism for driving the smoke guide plate to move, wherein the movement mechanism comprises a driving mechanism and a transmission mechanism for transmitting the output of the driving mechanism to the smoke guide plate, so that the smoke guide plate can be driven to pass through the air inlet to translate back and forth and turn over relative to the air inlet body through a rotating shaft extending in the left and right directions. Compared with the prior art, the utility model has the advantages that: the movement mechanism meets completely different user scene requirements at different positions, and the balance of the oil fume suction effect adaptive to multiple working conditions and the invasion sense of an operation space is realized.

Description

Fume exhaust fan

Technical Field

The utility model relates to an oil fume purification device, in particular to a range hood.

Background

The range hood has become one of the indispensable kitchen household electrical appliances in modern families. The range hood works by utilizing the fluid dynamics principle, sucks and exhausts oil smoke through a centrifugal fan arranged in the range hood, and filters partial grease particles by using a filter screen. 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.

In recent years, the low-suction range hood adopting the air inlet close to the smoke source and the smoke baffle plate is more and more popular due to good anti-interference effect. The chinese patent with application number 202020161585.6 discloses a low-suction range hood with a storage box, which comprises: the device comprises a shell, a smoke baffle, a box body, a storage box, a control panel, a fan and a power module; the smoke baffle plate is connected to the front side of the shell, and the lower part of the smoke baffle plate is provided with an air inlet; the box is connected in the top of casing, and the fan is fixed in the box.

The range hood has the following problems:

1. on one hand, because the air inlet of the common low-suction range hood is completely arranged on the side surface, the common low-suction range hood needs to block oil smoke from the upper end through fixing or turning the smoke baffle plate before the oil smoke is lifted, and then the oil smoke is sucked from the side surface, and the turning structure of the common low-suction range hood usually needs to be provided with special-shaped parts such as decorative strips and the like to fill the gap difference caused by rotation and combination. The static appearance effect is guaranteed to be flat, the cost of the decorating part needs to be additionally increased, the cost is high, the stability is poor, and the popularization difficulty is high.

2. The working state can only be an open state generally, and the cooking requirement of frequent cooking cannot be met while light oil smoke such as a high pot and the like is compatible, namely the requirement of the operating space of the high pot cannot be met.

SUMMERY OF THE UTILITY MODEL

The technical problem to be solved by the utility model is to provide a range hood aiming at the defects of the prior art, wherein a moving mechanism meets completely different user scene requirements at different positions, and the balance of oil smoke suction effect and operating space invasion feeling adapting to multiple groups of working conditions is realized.

The technical scheme adopted by the utility model for solving the technical problems is as follows: the utility model provides a range hood, includes the air inlet body and leads the cigarette board, thereby the uncovered constitution air intake of front side of the air inlet body, its characterized in that: the range hood further comprises a moving mechanism for driving the smoke guide plate to move, the moving mechanism comprises a driving mechanism and a transmission mechanism for transmitting the output of the driving mechanism to the smoke guide plate, and therefore the smoke guide plate can be driven to penetrate through the air inlet to translate front and back and turn over relative to the air inlet body through a rotating shaft extending in the left-right direction.

In order to realize the lifting and overturning of the smoke guide plate by single driving, the movement mechanism further comprises a bracket fixed relative to the air inlet body, a guide groove component is arranged on the bracket and comprises a first guide groove extending transversely and linearly and a second guide groove extending transversely and curvedly, and the first guide groove and the second guide groove are communicated with each other; the transmission mechanism comprises a connecting frame, the connecting frame is fixedly connected with the smoke guide plate, and the connecting frame is provided with a part capable of moving along the first guide groove and the second guide groove and another part capable of moving along the first guide groove.

Preferably, in order to facilitate smooth turning of the smoke guide plate, the second guide groove is arc-shaped.

In order to drive the connecting frame to rotate, the transmission mechanism further comprises a first connecting rod and a second connecting rod, one end of the first connecting rod is rotatably connected with the support and is driven by the driving mechanism to rotate, the other end of the first connecting rod is rotatably connected with one end of the second connecting rod, and the other end of the second connecting rod is rotatably connected with the connecting frame.

Preferably, in order to drive the first link, the driving mechanism is a motor, and an output end of the driving mechanism is directly or indirectly connected with an end of the first link.

In order to facilitate the relative movement of the connecting frame and the guide assembly, the transmission mechanism further comprises a first guide wheel and a second guide wheel which are arranged on the connecting frame, the first guide wheel can slide in the guide groove assembly, and the second guide wheel can slide in the second guide groove.

Preferably, for the link drives the smoke deflector and goes up and down and overturn, the link includes integrated into one piece's first support body, second support body and third support body, the second support body is buckled and is fashioned from the one end of first support body, the third support body is buckled and is fashioned by the one end that first support body was kept away from to the second support body, the extending direction of first support body and third support body is opposite, the tip that the second support body was kept away from to the third support body is connected fixedly with the smoke deflector, the one end of second support body is kept away from at first support body to first leading wheel setting, the second leading wheel setting is close to the one end of second support body at first support body.

In order to facilitate the connection of the connecting frame and the smoke guide plate, the connecting frame further comprises a fourth frame body, the fourth frame body is attached to and fixedly connected with the surface of the smoke guide plate, and the fourth frame body is formed by bending the end part of the third frame body far away from the second frame body.

Preferably, the rotation axes of the respective members of the transmission mechanism extend in the left-right direction.

Compared with the prior art, the utility model has the advantages that: utilize single drive both can adjust smoke deflector translation and upset around, satisfied on the one hand and had light oil cigarette such as high-pot but frequent cooking demand, on the other hand utilizes the clearance after the removal naturally can accomplish follow-up upset action, satisfy the effect that the oil smoke was intercepted from the top to the cigarette board under its big oil cigarette culinary art condition, let the oil smoke enter the air intake from the rear side, promote the oil absorption cigarette effect, and keep off the cigarette board natural embedding cavity in static time, it is uneven and the gap is poor to need not parts such as ornamental strip to fill to rotate, motion satisfies completely different user's scene demand in different positions, realize the balance that adaptation multiunit operating mode oil absorption cigarette effect and operating space invaded and feel.

Drawings

Fig. 1 is a schematic view of a range hood according to a first embodiment of the present invention in a first state;

fig. 2 is a sectional view of a range hood according to a first embodiment of the present invention in a first state;

FIG. 3 is a schematic view of the moving mechanism of the range hood of FIG. 2;

FIG. 4 is an exploded schematic view of the motion mechanism of FIG. 3;

fig. 5 is a schematic view of the range hood of the first embodiment of the present invention in a second state;

fig. 6 is a sectional view of the range hood of the first embodiment of the present invention in a second state;

FIG. 7 is a schematic view of the moving mechanism of the range hood of FIG. 5;

fig. 8 is a schematic view of a range hood according to the first embodiment of the present invention in a third state;

fig. 9 is a sectional view of a range hood according to the first embodiment of the present invention in a third state;

fig. 10 is a schematic view of a movement mechanism of the range hood of fig. 8;

fig. 11 is a schematic view of a range hood according to the first embodiment of the present invention in a fourth state;

fig. 12 is a sectional view of a range hood of the first embodiment of the present invention in a fourth state;

fig. 13 is a schematic view of a movement mechanism of the range hood of fig. 11;

fig. 14 is a schematic view of a range hood according to a second embodiment of the present invention in a first state;

fig. 15 is a schematic view of a range hood according to a second embodiment of the present invention in a second state;

fig. 16 is a schematic view of a range hood according to a second embodiment of the present invention in a third state;

fig. 17 is a schematic view of a range hood in a fourth state according to a second 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," "transverse," "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 illustrated in the drawings for the purposes of convenience in describing the utility model and to simplify the description, but are not intended to indicate or imply that the referenced devices or elements must be in a particular orientation, construction and operation, and that the disclosed embodiments of the utility model are arranged in different orientations, so that the directional terms are exemplary only and are not to be construed as limiting, e.g., "upper," "lower than," and the same, "" lower than, "etc., where the same, and the same than the like in the same than the other than the same than the other than the same in the same than the same in the same than in the same direction of the same, "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.

Example one

Referring to fig. 1 to 4, a range hood comprises an air inlet body 1, a fan frame 2 arranged above the air inlet body 1, and a fan system 3 arranged in the fan frame 2, wherein the air inlet body 1 is communicated with the fan frame 2. The air inlet body 1 is in a hollow box shape, the front side of the air inlet body 1 is open to form an air inlet 11, and oil smoke can enter the air inlet frame 2 after being sucked from the air inlet 11 and is discharged through the fan system 3.

The range hood further comprises a smoke guide plate 41 and a movement mechanism thereof. The smoke guide 41 is a flat plate. The movement mechanism comprises a driving mechanism 42, a transmission mechanism and a bracket 44, the bracket 44 is flat and is arranged on the left side or the right side in the air inlet body 1, and the bracket 44 and the air inlet body 1 can be integrated. The transmission mechanism comprises a first connecting rod 431, a second connecting rod 432 and a connecting frame 433, one end of the first connecting rod 431 is rotatably connected with the support 44, the other end of the first connecting rod 431 is rotatably connected with one end of the second connecting rod 432, the other end of the second connecting rod 432 is rotatably connected with one end of the connecting frame 433, and the other end of the connecting frame 433 is fixedly connected with the smoke guide plate 41. The connection frame 433 includes a first frame 4331, a second frame 4332 and a third frame 4333 which are integrally formed, wherein one end of the first frame 4331 is rotatably connected to the second link 432, the second frame 4332 is bent and formed from an end of the first frame 4331 away from the second link 432, the third frame 4333 is bent and formed from an end of the second frame 4332 away from the first frame 4331, the first frame 4331 and the third frame 4333 extend in opposite directions, as shown in fig. 3, the first frame 4331 extends downward from a connection point with the second frame 4332, and the third frame 4333 extends rightward from a connection point with the second frame 4332. The end of the third frame body 433 far away from the second frame body 4332 is fixedly connected with the smoke guide plate 41.

The bracket 44 is provided with a guide groove assembly including a first guide groove 441 extending horizontally and a second guide groove 442 extending in a curved manner forwardly and downwardly from a position in an upper middle portion of the first guide groove 441 (here and below, the middle portion or middle refers to a position between a front end and a rear end of the first guide groove 441, and is not strictly required to be a position in the middle), and the first guide groove 441 and the second guide groove 442 communicate with each other. Of course, the second guide groove 442 may be formed on the first guide groove 441, and the bending direction of the connecting frame 433 may be adjusted as long as the first guide groove 441 linearly extends in the transverse direction to define a path along which the smoke guide plate 41 moves forward and backward, and the second guide groove 442 extends in a bent (preferably arc-shaped) manner in the transverse direction to define a path along which the smoke guide plate 41 turns. Here, the second guide groove 442 is curved and extends in a transverse direction, that is, the two ends thereof have a height difference in the transverse direction and are connected with each other in a curved line.

The end of the first frame body 4331 connected to the second link 432 is provided with a first guide wheel 434, the end of the first frame body 4331 remote from the second link 432 is provided with a second guide wheel 435, the first guide wheel 434 is preferably connected to both the first frame body 4331 and the second link 432, and the second guide wheel 435 is connected to the first frame body 4331. To facilitate rotation of the second link 432 and the connecting frame 433 relative to the guide slot assembly, the first guide wheel 434 and the second guide wheel 435 are rotatably coupled to the connecting frame 433. The first guide wheel 434 is slidable along the first guide groove 441 and the second guide groove 442, and the second guide wheel 435 is slidable along the first guide groove 441.

The driving mechanism 42 is a rotation driving mechanism, preferably a motor, and an output shaft thereof is directly or indirectly connected to an end of the first link 431 so as to drive the first link 431 to rotate.

The rotation axes of the components of the transmission mechanism extend in the left-right direction. The smoke guide 41 can be rotated without being fixed, but the rotation axis at any time extends in the left-right direction.

The connecting frame 433 may further include a fourth frame 4334, and the fourth frame 4334 is attached to and fixed to the surface of the smoke guide plate 41. The fourth body 4334 is formed by bending an end of the third body 4333 away from the second body 4332, and preferably, the fourth body 4334 and the third body 4333 are perpendicular to each other.

The driving mechanism 41 drives the first connecting rod 431 to rotate, the smoke guide plate 41 can be driven to move back and forth and extend or retract in the first stage, and at the moment, the first guide wheel 434 runs back and forth in the first guide groove 441, so that the cooking requirements of light oil smoke such as a high pot and the like but frequent cooking can be met (the high pot is higher, but generally cooking or cooking is carried out with less oil smoke, a circle of light oil smoke around the smoke suction port is distributed, and the smoke suction port can suck back in case of escape of a top gap); on the other hand, the subsequent overturning action can be naturally finished by utilizing the moved gap.

In the second stage, if a high pot is not used, but a scene of stir-frying large oil smoke is adopted, the driving connecting rod further rotates, the first guide wheel 434 enters the second guide groove 442 to operate, the smoke guide plate 41 turns outwards on the basis of forward movement and is deformed into a large smoke baffle plate similar to general low-suction or side-suction, and smoke sources such as a pot and the like are further covered under the smoke baffle plate, so that the large oil smoke is conveniently and quickly sucked away.

Under the condition of closing, the smoke guide plate 41 and the air inlet body 1 can be perfectly embedded and leveled because the smoke guide plate can move back and forth, and the smoke guide plate and the air inlet body are more attractive and better matched.

Referring to fig. 2 and 3, at this time, the first guide wheel 434 is located at the rear end of the first guide groove 441, the second guide wheel 435 is located in the middle of the first guide groove 441, the first frame body 4331 and the third frame body 4333 of the connecting frame 433 are in a horizontal state and the second frame body 4332 is in a vertical state, at this time, the smoke guide plate 41 is in a vertical or nearly vertical state, and is located at the air inlet 11 of the air inlet body 1 to close the air inlet 11, which is in the first state.

Referring to fig. 5 to 7, at this time, the first guide wheel 434 is located in the middle of the first guide slot 411, the second guide wheel 435 is located at the front end of the first guide slot 411, the first frame 4331 and the third frame 4333 of the connecting frame 433 are in a horizontal state, the second frame 4332 is in a vertical state, the smoke guide plate 41 is located in front of the air inlet 11 of the air inlet body 1 at intervals, the second state is a second state, and light oil smoke such as a high-pot is generated but cooking is frequently performed, or in a stage before turning over, the requirements of light oil smoke such as a high-pot and cooking is frequently performed, because the high-pot is higher, but cooking or cooking is generally performed with less oil smoke, the smoke suction port is distributed to absorb a circle of light oil smoke around, and can suck back in case there is an escaping top gap; on the other hand, as an intermediate state, the subsequent turning action can be naturally completed by utilizing the moved gap.

Referring to fig. 8 to 10, the first link 431 continues to rotate, the smoke guide plate 41 turns outwards on the basis of forward movement until the first guide wheel 434 is located in the second guide groove 442, for example, the middle position, the second guide wheel 435 is located in the first guide groove 441, the second guide wheel 435 is located at the front side of the first guide wheel 434, the first frame body 4331, the second frame body 4332 and the third frame body 4333 of the connecting frame 433 are all in a state of inclining to the horizontal direction, at this time, the smoke guide plate 41 turns over relative to the air inlet body 1, gradually inclines forwards from top to bottom, deforms to be a large smoke baffle plate similar to general low suction or side suction, further covers a smoke source such as a pot and the like below the smoke source cage, and is convenient for rapidly sucking away large oil smoke, and is in a third state, and is suitable for a situation of explosion stir-frying of large oil smoke when there is no high pot.

Referring to fig. 11 to 13, the first link 431 continues to rotate until the first guide wheel 434 is located at the front end of the second guide groove 442, the second guide wheel 435 is located at the front end of the first guide groove 441, the first frame body 4331 and the third frame body 4333 of the connecting frame 433 are in a vertical state and the second frame body 4332 is in a horizontal state, and at this time, the smoke guide plate 41 is in a horizontal or nearly horizontal state, which is a fourth state, so that the inner cavity of the intake body 1 can be conveniently cleaned.

The range hood of the embodiment has the following control methods. In the first control method, a position sensor can be arranged on the connecting rod or the smoke guide plate 41, a distance sensor such as a radar, a camera and the like is arranged at the bottom of the air inlet body 1, whether a high pan is arranged below the air inlet body is detected, the range hood is used by combining the oil smoke sensor, and the range hood has no power or current detection feedback. The method specifically comprises the following steps:

1) starting the range hood and operating in a default gear;

2) reading sensor information including information of a distance sensor and an oil smoke sensor;

3) judging whether the bottom is provided with a high pot and other space occupying appliances, if so, extending the smoke guide plate 41 forwards, absorbing oil smoke in a circle around the smoke guide plate, and entering the step 5); if not, entering step 4);

4) comparing the oil smoke concentration ya detected by the current oil smoke sensor with a set threshold value m3, judging whether ya is larger than m3, if yes, indicating that the oil smoke is in an ultra-large oil smoke stir-frying state, deforming the smoke guide plate 41 into an overturning state, and entering the step 5);

5) acquiring current position information through a position sensor;

6) judging whether the position is matched with the current cooking scene, if so, returning to the step 2), if not, driving the smoke guide plate 41 to the corresponding state by the driving mechanism 42, and after waiting for the time interval delta ta, returning to the step 5).

The second control method is different from the range hood structure used by the first control method in that the range hood has power or current detection feedback and can adjust air volume or gears. The method specifically comprises the following steps:

1) starting the range hood and operating in a default gear;

5) acquiring current position information through a position sensor;

6) judging whether the position is matched with the current cooking scene, if so, entering step 7), if not, driving the smoke guide plate 41 to a corresponding state by the driving mechanism 42, and after waiting for a time interval delta ta, returning to step 5);

7) acquiring current power or rotation speed and a power or rotation speed coefficient of a current position, and calculating to obtain current flow Qm;

8) judging whether Qm is in [ Qx, Qd ] of the corresponding scene, wherein Qx and Qd are respectively the upper and lower limit values of the corresponding scene, if yes, entering step 9), and if not, entering step 10);

9) continuing monitoring, wherein the monitoring frequency s is s +1, judging whether s is greater than or equal to s1, s1 is a preset threshold value for the monitoring frequency, and if so, writing the gear and the position of the current scene into a storage updating preset value and resetting s to be 0; if not, continuing to monitor, and returning to the step 2);

10) judging whether Qm is larger or smaller, if larger, namely Qm is larger than Qd, entering step 11), and if smaller, namely Qm is smaller than Qs, entering step 13);

11) judging whether the current gear or the rotating speed is lowest, and if so, entering step 12); if not, the 1 st gear is adjusted down, and the step 7) is returned;

12) judging whether the current smoke guide plate 41 is at the highest position, and if so, prompting maintenance; if not, heightening the smoke guide plate 41, reducing the air inlet channel, and returning to the step 7);

13) judging whether the current gear or the rotating speed is highest, if so, entering step 14); if not, the 1 st gear is increased, and the step 7) is returned;

14) and (4) judging whether the air inlet channel at the position of the current smoke guide plate 41 is the maximum or not, if so, prompting to clean, otherwise, enlarging the channel, and returning to the step 7).

Example two

Referring to fig. 14, in the present embodiment, the difference from the first embodiment is that the smoke guide plate 41 has two smoke guide plates arranged side by side in the left-right direction, and each smoke guide plate 41 corresponds to one moving mechanism, whereby the two smoke guide plates 41 can be moved independently. As shown in fig. 14, both the smoke guide plates 41 are in the first state of being closed, as shown in fig. 15, both the smoke guide plates 41 are in the third state of being turned over, as shown in fig. 16, and both the smoke guide plates 41 are in the fourth state of being cleaned, as shown in fig. 17, the left smoke guide plate 41 is turned over, and the right smoke guide plate 41 is moved forward.

1) starting the range hood and operating in a default gear;

3) judging whether the bottom is provided with a high pot and other space occupying devices, if so, judging whether both sides are provided, if both sides are provided, the two smoke guide plates 41 extend forwards, entering the step 5), and if one side is provided with the high pot, the smoke guide plate 41 on the corresponding side extends forwards, entering the step 5); if not, entering step 4);

5) acquiring current position information through a position sensor;

The second control method is different from the range hood structure utilized by the first control method in that the range hood has power or current detection feedback and can adjust air volume or gears. The method specifically comprises the following steps:

1) starting the range hood and operating in a default gear;

5) acquiring current position information through a position sensor;

6) judging whether the position is matched with the current cooking scene, if so, entering the step 7), if not, driving the smoke guide plate 41 to a corresponding state by the driving mechanism 42, and returning to the step 5 after waiting for a time interval delta ta);

7) acquiring current power or rotation speed, and power or rotation speed coefficient of the current position, thereby calculating to obtain current flow Qm;

14) and (4) judging whether the air inlet channel at the position of the current smoke guide plate 41 is the maximum, if so, prompting to clean, otherwise, enlarging the channel, and returning to the step 7).

The third control method is different from the range hood structure used in the second control method in that the range hood is used only by detecting the rotation step by the driving mechanism 42 or calculating the rotation angle to judge based on the rotation speed and the time product, the range hood is provided with a temperature sensor to use, the on-off range hood state can be automatically switched, and whether the current mode is met or not is confirmed according to the feedback of the air volume calculation so as to adjust the state. The method specifically comprises the following steps:

1) standby of the range hood, and monitoring operation of the temperature sensor;

2) recording a group of left and right temperature information, and acquiring the numerical value of a left temperature sensor and the numerical value of a right temperature sensor;

3) judging whether 2 groups of different time values exist, and if so, entering a step 4); if not, returning to the step 2) after waiting for the time interval delta t;

4) calculating left and right temperature change slopes, wherein the left temperature change slope kL is (TL2-TL 1)/delta t, and the right temperature change slope kR is (TR2-TR 1)/delta t; TL2 and TL1 are values of two groups of left side temperature sensors, wherein TL2 time is later, TR2 and TR1 are values of two groups of right side temperature sensors, wherein TR2 time is later;

5) reading the stored left and right temperature change slope reference values kLa and kRa;

6) respectively comparing kL with kLa, kR and kRa, if the kL is greater than kLa and the kL is positive, starting the range hood to smoke, and entering the step 8); if | kL | is more than kLa and kL is negative, or | kL | is less than or equal to kLa, then entering step 7); if the absolute value of kR is more than kRa and kR is positive, starting the range hood to smoke and entering the step 8); if | kR | > kRa and kR is negative, or | kR | ≦ kRa, then proceed to step 7);

7) judging whether TR2 and TL2 are respectively smaller than reference values Tra and TLa, if so, not starting the range hood, otherwise, starting the range hood to smoke, and entering step 8);

8) comparing kL and kR, if kL-kR is more than ktheta, indicating that smoking on the left side is dominant, and entering the step 9); if the | kL-kR | is less than k theta, the left side and the right side are similar, and the step 9) is carried out; if kR-kL is more than ktheta, indicating that smoking on the right side is dominant, and entering step 9);

9) judging whether the temperature value changes suddenly, if so, adjusting to the large smoke position of each state for operation, defaulting a large gear for a fan system, and entering the step 10); if not, adjusting to the small smoke position in each state to operate, defaulting the small gear of the fan system, and entering the step 10);

10) acquiring current position information through the rotation steps or angles of the motor;

11) judging whether the position matches the current cooking scene, if yes, entering step 12), if not, driving the smoke guide plate 41 to the corresponding state by the driving mechanism 42, and returning to step 10 after waiting for the time interval delta ta).

12) Acquiring current power or rotation speed and a power or rotation speed coefficient of a current position, and calculating to obtain current flow Qm;

13) judging whether Qm is in [ Qx, Qd ] of the corresponding scene, wherein Qx and Qd are respectively the upper and lower limit values of the corresponding scene, if yes, entering step 14), and if not, entering step 15);

14) continuing monitoring, wherein the monitoring frequency s is s +1, judging whether s is greater than or equal to s1, s1 is a preset threshold value for the monitoring frequency, and if so, writing the gear and the position of the current scene into a storage updating preset value and resetting s to be 0; if not, continuing to monitor, and returning to the step 2);

15) judging whether Qm is larger or smaller, if larger, namely Qm is larger than Qd, entering step 16), and if smaller, namely Qm is smaller than Qs, entering step 18);

16) judging whether the current gear or the rotating speed is lowest, and if so, entering a step 17); if not, the 1 st gear is adjusted down, and the step 12) is returned to;

17) judging whether the current smoke guide plate 41 is at the highest position, and if so, prompting maintenance; if not, heightening the smoke guide plate 41, reducing the air inlet channel, and returning to the step 12);

18) judging whether the current gear or the rotating speed is highest, if so, entering a step 19); if not, the 1 st gear is increased, and the step 12) is returned;

19) and (4) judging whether the air inlet channel at the position of the current smoke guide plate 41 is the maximum or not, if so, prompting to clean, otherwise, enlarging the channel, and returning to the step 12).

Claims

1. The utility model provides a range hood, includes the air inlet body (1) and leads cigarette board (41), thereby the front side of the air inlet body (1) is uncovered constitutes air intake (11), its characterized in that: the range hood further comprises a movement mechanism for driving the smoke guide plate (41) to move, wherein the movement mechanism comprises a driving mechanism (42) and a transmission mechanism for transmitting the output of the driving mechanism (42) to the smoke guide plate (41), so that the smoke guide plate (41) can be driven to pass through the air inlet (11) to translate back and forth and turn over relative to the air inlet body (1) through a rotating shaft extending in the left-right direction.

2. The range hood of claim 1, wherein: the moving mechanism further comprises a support (44) fixed relative to the air inlet body (1), a guide groove assembly is formed in the support (44), the guide groove assembly comprises a first guide groove (441) extending in a transverse straight line mode and a second guide groove (442) extending in a transverse bending mode, and the first guide groove (441) and the second guide groove (442) are communicated with each other; the transmission mechanism comprises a connecting frame (433), the connecting frame (433) is fixedly connected with the smoke guide plate (41), and the connecting frame (433) is provided with a part capable of moving along the first guide groove (441) and the second guide groove (442) and another part capable of moving along the first guide groove (441).

3. The range hood of claim 2, wherein: the second guide groove (442) is arc-shaped.

4. The range hood of claim 2, wherein: the transmission mechanism further comprises a first connecting rod (431) and a second connecting rod (432), one end of the first connecting rod (431) is rotatably connected with the support (44) and is driven by the driving mechanism (42) to rotate, the other end of the first connecting rod (431) is rotatably connected with one end of the second connecting rod (432), and the other end of the second connecting rod (432) is rotatably connected with the connecting frame (433).

5. The range hood of claim 4, wherein: the driving mechanism (42) is a motor, and the output end of the driving mechanism (42) is directly or indirectly connected with the end part of the first connecting rod (431).

6. The range hood of claim 2, wherein: the transmission mechanism further comprises a first guide wheel (434) and a second guide wheel (435) which are arranged on the connecting frame (433), wherein the first guide wheel (434) can slide in the guide groove component, and the second guide wheel (435) can slide in the second guide groove (442).

7. The range hood of claim 6, wherein: the connecting frame (433) comprises a first frame body (4331), a second frame body (4332) and a third frame body (4333) which are integrally formed, the second frame body (4332) is formed by bending one end of the first frame body (4331), the third frame body (4333) is formed by bending one end, away from the first frame body (4331), of the second frame body (4332), the third frame body (4333) is formed by bending one end, away from the first frame body (4331), of the second frame body (4333), the extending directions of the first frame body (4331) and the third frame body (4333) are opposite, the end, away from the second frame body (4332), of the third frame body (4333) is fixedly connected with the smoke guide plate (41), the first guide wheel (434) is arranged at one end, away from the second frame body (4332), of the second guide wheel (435) is arranged at one end, close to the second frame body (4332), of the first frame body (4331).

8. The range hood of claim 7, wherein: the connecting frame (433) further comprises a fourth frame body (4334), the fourth frame body (4334) is attached to and fixedly connected with the surface of the smoke guide plate (41), and the fourth frame body (4334) is formed by bending the end part, far away from the second frame body (4332), of the third frame body (4333).

9. The range hood according to any one of claims 4 to 8, wherein: the rotating shafts of all the components of the transmission mechanism extend in the left-right direction.