CN216557276U - Fume exhaust fan - Google Patents

Abstract

The utility model discloses a range hood, which comprises a smoke collecting hood, wherein the bottom of the smoke collecting hood is provided with an air inlet, a smoke baffle plate capable of opening and closing the air inlet is arranged at the air inlet, the range hood also comprises a first motion mechanism for driving the smoke baffle plate to overturn relative to the smoke collecting hood, the range hood also comprises a second motion mechanism for driving the smoke baffle plate to overturn relative to the smoke collecting hood, the first motion mechanism and the second motion mechanism are respectively arranged at two sides of the smoke baffle plate in the length direction, and the first motion mechanism and the second motion mechanism both comprise a driving mechanism and a transmission mechanism for transmitting the output of the driving mechanism to the smoke baffle plate; the output end of the driving mechanism of the second movement mechanism is connected with the input end of the transmission mechanism through the elastic piece, so that the elastic piece applies torque in the opening direction to the input end of the transmission mechanism when the smoke baffle is in the opening state, and the elastic piece applies torque in the closing direction to the input end of the transmission mechanism when the smoke baffle is closed.

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. Generally, the range hood comprises a top suction type range hood and a side suction type range hood, and the top suction type range hood has more and more extensive application due to the advantages of neatness, lightness, small occupied space and the like. The top-suction type range hood generally includes a fume collecting hood, a fan housing located on the fume collecting hood, and a volute, an impeller, and a motor for driving the impeller are installed in the fan housing.

The existing top-suction type range hood is higher in hanging height, generally has a complex smoke collecting cavity body in order to ensure the oil smoke suction effect, for example, a smoke collecting hood assembly and a range hood disclosed in the Chinese patent with the application number of 202110514970.3, and relates to the technical field of kitchen appliances, the smoke collecting hood assembly comprises a smoke collecting hood, a smoke inlet of the smoke collecting hood is provided with a baffle, the baffle is movably connected to the smoke collecting hood or detachably connected to the smoke collecting hood, and the baffle divides the smoke inlet of the smoke collecting hood into a first air inlet and a second air inlet; the first air inlet can be dismantled and be connected with first filter screen, and the second air inlet can be dismantled and be connected with the second filter screen. The range hood with the form has more smoke collection cavity corners, complex appearance and poor cleanness.

In addition, a pure flat top suction type range hood without a cavity is provided, but the range hood has a range hood effect which cannot adapt to the use environment of a Chinese kitchen. The ceiling-mounted range hood disclosed in chinese patent application No. 202011335153.3, comprising: the smoke collecting cover is provided with a smoke collecting cavity, and the bottom of the smoke collecting cavity is provided with a smoke inlet; the smoke collecting plate covers the oil smoke inlet and can be turned out towards the lower front; and a control panel which is hidden in the front end area of the bottom of the smoke collection cavity and can be turned out downwards.

Moreover, the range hood has larger smoke collecting plate and longer length, and the smoke collecting plate is hung upside down when being closed, so that the gravity causes the opened moment of the smoke collecting plate to be larger. If adopt traditional both sides pivot unilateral drive scheme, the drive end is closed back, and the driven end can lead to holding together cigarette board and organism of driven side to have the clearance about 5mm because of the whole deformation of mechanism, directly influences complete machine outward appearance. If both sides all adopt traditional motor drive scheme, the corner synchronism requirement to both sides motor is higher, to other use scenes that require synchronization, generally uses step motor in the household electrical appliances trade, but the step motor output torque that the volume is suitable can't satisfy the requirement of this model (big glass, long distance arm of force, shutdown closing torque is more than 2 N.M), and its control part is complicated, and is with high costs. And the stepping motor may be out of step when the load changes in the use process, and serious faults such as distortion of the smoke collecting plate, deformation of the glass back plate and the like can be caused in the machine.

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 in the prior art, which not only can enable two sides of a smoke baffle plate in the length direction to be tightly closed, but also can ensure the smoke baffle plate to be normally opened.

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 collection petticoat pipe, the air intake has been seted up to the bottom of collection petticoat pipe, air intake department is provided with the cigarette board that keeps off that can open and close the air intake, range hood is still including being used for the drive to keep off the first motion of the relative collection petticoat pipe upset of cigarette board, its characterized in that:

the range hood also comprises a second motion mechanism for driving the smoke baffle plate to overturn relative to the smoke collecting cover, the first motion mechanism and the second motion mechanism are respectively arranged at two sides of the smoke baffle plate in the length direction, and both the first motion mechanism and the second motion mechanism comprise a driving mechanism and a transmission mechanism for transmitting the output of the driving mechanism to the smoke baffle plate;

the output end of the driving mechanism of the second movement mechanism is connected with the input end of the transmission mechanism through the elastic piece, so that the elastic piece applies torque in the opening direction to the input end of the transmission mechanism when the smoke baffle is in the opening state, and the elastic piece applies torque in the closing direction to the input end of the transmission mechanism when the smoke baffle is closed.

Preferably, the elastic part is a torsion spring, the driving mechanism of the second movement mechanism is provided with an output shaft as an output end, the torsion spring is fixedly sleeved on the periphery of the output shaft, one end of the torsion spring is fixedly connected with the output shaft, and the other end of the torsion spring is fixedly connected with the input end of the transmission mechanism.

Preferably, for the output of actuating mechanism transmits the cigarette board that keeps off in order to, drive mechanism includes drive swing arm, execution swing arm and the connecting rod as the input, first motion and second motion still all are including the mount pad that is used for installing drive mechanism, the output shaft rotates with the mount pad to be connected, first drive swing arm is fixed with the output shaft, drive swing arm still is connected with execution swing arm through the connecting rod, be the rotation connection between drive swing arm and the connecting rod and between connecting rod and the execution swing arm, execution swing arm still rotates with the mount pad to be connected.

For the convenience of fixing the end parts of the torsion springs, the two end parts of the torsion springs are respectively connected and fixed with the corresponding output shafts and the driving swing arms through screws.

In order to limit the rotation angle of the output shaft conveniently, a rotating shaft limiting column used for stopping a screw fixed with the output shaft so as to limit the rotation angle of the output shaft is arranged on the mounting base.

Gather together the cigarette and improve the oil absorption cigarette effect when starting for being convenient for, and be convenient for clean when shutting down, the collection petticoat pipe is including the bottom plate that is located the bottom, the air intake is seted up on the bottom plate, the preceding tip border of air intake is located behind the preceding tip of bottom plate, and when keeping off the cigarette board and being in the closed condition, keep off the bottom plate of cigarette board and collection petticoat pipe and flush.

In order to output large torque, the driving mechanism is a direct current motor.

The technical scheme adopted by the utility model for solving the technical problems is as follows: the main drive is arranged on one side of the smoke baffle, and the auxiliary drive is arranged on the other side of the smoke baffle, so that torque can be applied to assist the smoke baffle to open and close when the smoke baffle is opened and closed, the normal opening of the smoke baffle is ensured, and both sides of the smoke baffle can be tightly closed when the smoke baffle is closed; the torsion spring is used for transmitting torque, and the auxiliary drive is used for tensioning the smoke baffle plate by running a certain angle when the smoke baffle plate is fully opened and fully closed; the requirement on the rotating speed stability of the driving mechanism is low, and the obvious distortion and deformation of the smoke baffle plate cannot be caused by the rotating speed fluctuation in the motion process.

Drawings

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

fig. 2 is a schematic view (closed state) of a part of a smoke collecting hood, a moving assembly and a smoke baffle of the range hood according to the embodiment of the utility model;

fig. 3 is a sectional view (closed state) of a hidden fan frame of the range hood according to the embodiment of the present invention;

fig. 4 is a schematic view (closed state) of the moving components and the smoke baffle of the range hood according to the embodiment of the present invention;

fig. 5 is a schematic view (closed state) of the first moving mechanism of the moving assembly of the range hood according to the embodiment of the present invention;

fig. 6 is a schematic view (closed state) of a second movement mechanism of the movement assembly of the range hood according to the embodiment of the present invention;

fig. 7 is a partial schematic view (closed state) of a second movement mechanism of the movement assembly of the range hood according to the embodiment of the present invention;

fig. 8 is a schematic view of an open state of the range hood according to the embodiment of the present invention;

fig. 9 is a sectional view (open state) of a hidden fan frame of the range hood according to the embodiment of the present invention;

fig. 10 is a schematic view of the moving components and the smoke barrier of the range hood according to the embodiment of the present invention (open state;

fig. 11 is a schematic view (open state) of the first moving mechanism of the moving assembly of the range hood according to the embodiment of the present invention;

fig. 12 is a schematic view (open state) of the second movement mechanism of the movement assembly of the extractor hood according to the embodiment of the present invention;

fig. 13 is a partial schematic view (open state) of the second moving mechanism of the moving assembly of the extractor 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, 8 and 9, a range hood, which is a ceiling range hood, includes a fume collecting hood 1 and a fan frame 2 disposed above the fume collecting hood 1, and a fan system (not shown) is disposed in the fan frame 2.

The smoke collecting hood 1 comprises a bottom plate 11 located at the bottom, an air inlet 12 is formed in the bottom plate 11, the edge of the front end of the air inlet 12 is located behind the front end of the bottom plate 11, and the air inlet 12 is communicated with fluid in the fan frame 2.

The air inlet 12 is provided with a smoke baffle 3, the front end part of the smoke baffle 3 is rotatably connected with the smoke collecting hood 1, and the rear end part of the smoke baffle 3 is a free end. When the range hood does not work, the smoke baffle 3 is in a closed state, and the air inlet 12 is closed at the moment; when the range hood needs to work, the smoke baffle 3 is turned forwards, so that the air inlet 12 is opened. When the smoke barrier 3 is in a closed state, it is flush with the bottom plate 11 of the smoke collecting hood 1, thereby constituting a pure flat structure.

A filter screen 4 is arranged above the air inlet 12 in the smoke collecting hood 1, the filter screen 4 is preferably a grid screen, an oil cup 5 is arranged below the rear side of the smoke collecting hood 1, and the filter screen 4 is inclined downwards gradually from front to back, so that oil dropping on the filter screen 4 can be guided into the oil cup 5. A grid net can also be arranged at the joint of the smoke collecting cover 1 and the wind frame 2.

The smoke collecting hood 1 of the utility model cancels a complex smoke collecting cavity, adopts a simple grid air inlet mode in a starting working state, and has a pure flat structure at the bottom in a shutdown non-working state. Combine to keep off cigarette board 3, realized the start and do not run the cigarette, shut down easy cleanness.

In order to drive the smoke baffle 3 to rotate, the range hood further comprises a movement assembly, the movement assembly comprises a first movement mechanism and a second movement mechanism which are arranged on the left side and the right side in the smoke collecting cover 1, and the first movement mechanism and the second movement mechanism respectively comprise a driving mechanism 61, a driving swing arm 62 and an execution swing arm 63. Referring to fig. 4 to 7, and fig. 10 to 13, in which the driving mechanism 61 is a rotary driving mechanism having an output shaft 611 extending in the left-right direction, the driving mechanism 61 is preferably a dc motor. The first motion mechanism and the second motion mechanism further each include a mounting seat 64 for mounting the drive mechanism 61, and the output shaft 611 is rotatably connected with the mounting seat 64. The driving swing arm 62 is fixedly connected with the output shaft 611, in addition, the driving swing arm 62 is further connected with the executing swing arm 63 through a connecting rod 65, the driving swing arm 62 and the connecting rod 65 are rotatably connected, the executing swing arm 63 is further rotatably connected with the mounting base 64, and the rotating axis of each rotating connection extends in the left-right direction. The execution swing arm 63 is further connected and fixed with the smoke baffle 3 towards one side in the smoke collecting hood 1, preferably indirectly connected, provided with a smoke baffle bracket as commonly used, and connected through the smoke baffle bracket. Therefore, the first movement mechanism and the second movement mechanism are respectively connected with the left side and the right side of the smoke baffle plate 3 (two sides of the smoke baffle plate 3 in the length direction) to ensure that the left side and the right side are tightly closed.

The first motion mechanism is used as a main driving part, and therefore, the driving mechanism 61 is started to directly drive the driving swing arm 62 to rotate, and then the actuating swing arm 63 is driven to rotate through the connecting rod 65, so as to drive the smoke baffle 3 to rotate. The driving swing arm 62 and the executing swing arm 63 have the same rotation angle, such as 135 ° in the present embodiment, and the mounting seat 64 may form a limit for the driving swing arm 62, such as a protrusion or the like provided on the rotation path of the driving swing arm 62 on the mounting seat 64 interfering with the driving swing arm 62, thereby ensuring the rotation angle of the driving swing arm 62. In this embodiment, the rotation angles of the output shaft of the driving mechanism 61 of the first movement mechanism and the smoke barrier 3 are both 135 ° during the opening and closing process.

The second movement mechanism serves as an auxiliary drive member. The second motion mechanism further comprises a torsion spring 66 and a screw 67, the torsion spring 66 is wound around the periphery of the output shaft 611 of the driving mechanism 61 of the second motion mechanism, one end of the torsion spring 66 is fixedly connected with the output shaft 611, and the other end of the torsion spring 66 is fixedly connected with the driving swing arm 62 of the second motion mechanism. The torsion spring 66 may be fixedly coupled to the corresponding output shaft 611 and the driving swing arm 62 by a screw 67.

By the provision of the torsion spring 66, a flexible connection between the drive mechanism 61 of the second motion mechanism and the drive swing arm 62 is achieved. The output rotational angular velocity of the drive mechanism 71 becomes an output variable torque with respect to the rigid connection. The mounting seat 64 is provided with a rotation shaft stopper 641 capable of stopping the screw 67 for fixing the torsion spring 66 and the output shaft 611, thereby limiting the rotation angle of the output shaft 611 and assisting the return of the driving mechanism 61. In this structure, the drive swing arm 62 rotates through an angular range of 130 °, and the output shaft 611 rotates through an angular range of 310 °. The output shaft 611 rotates 180 more than the driving swing arm 62 in the whole process, and here, the relative angle between the output shaft 611 and the driving swing arm 62 is θ (clockwise is positive), when the second motion mechanism is in the fully open state, θ is 90 °, and when the second motion mechanism is in the fully closed state, θ is-90 °. When θ is 0 °, the torsion spring 66 is in a non-torque state, when θ is greater than 0 °, the torsion spring 66 has a torque in the opening direction to the driving swing arm 62, and when θ is less than 0 °, the torsion spring 66 has a torque in the closing direction to the driving swing arm 62.

The driving swing arm 62, the executing swing arm 63 and the connecting rod 65 form a transmission mechanism, and alternatively, the transmission mechanism may also adopt other existing mechanisms, as long as the torsion spring 66 is fixedly connected with the input end of the transmission mechanism, and the output end of the transmission mechanism is fixedly connected with the smoke baffle 3. The torsion spring 66 may be replaced by other elastic members, such as a spring plate, etc., as long as the connection between the driving mechanism 61 and the driving swing arm 62 of the second motion mechanism is not rigid, and can apply torque to the driving swing arm 62 at the opening and closing positions.

The control method of the range hood comprises the following steps:

1) judging whether the smoke baffle 3 needs to be driven, if so, entering the step 2);

2) if the smoke baffle 3 needs to be driven to open, the step 2.1) is carried out; if the smoke baffle 3 needs to be driven to close, the step 2.2) is carried out;

2.1) before the smoke barrier 3 performs an opening operation, the smoke barrier 3 is in a closed state, and at this time, θ is equal to-90 °, that is, after the driving mechanism 61 of the second movement mechanism rotates by more than 90 degrees in the opening direction until θ is greater than 0 °, the second movement mechanism gives an opening moment to the smoke barrier 3; executing the opening operation of the smoke barrier 3, firstly controlling the driving mechanism 61 of the second motion mechanism to act along the direction of driving the smoke barrier 3 to open at the rotating speed omega, and after the time t (t is pi/2 omega), controlling the driving mechanism 61 of the first motion mechanism to act along the direction of driving the smoke barrier 3 to open at the rotating speed omega; in the process, if the rotating speeds of the driving mechanism 61 of the first moving mechanism and the driving mechanism 61 of the second moving mechanism 62 are inconsistent, the angle of the smoke barrier 3 is consistent with the angle of the first moving mechanism, while the relative angle theta between the driving swing arm 62 of the second moving mechanism and the corresponding output shaft 611 fluctuates around 0 degrees along with the inconsistency of the rotating speeds of the two, the driving mechanism 61 of the second moving mechanism gives a small torque to the corresponding driving swing arm 62, but the torque is small, so that the opening action of the smoke barrier 3 cannot be influenced; when the first motion mechanism reaches the full opening angle and stops rotating, the second motion mechanism keeps moving (rotating) to the opening limit position, see fig. 12 and 13, at this time, θ is 90 °, the torsion spring 66 has torque in the opening direction to the driving swing arm 62, and the corresponding side of the auxiliary smoke barrier 3 can also be opened in place;

2.2) before the smoke barrier 3 performs the closing operation, the smoke barrier 3 is in a fully opened state, and at this time, θ is 90 °, that is, after the driving mechanism 61 of the second motion mechanism rotates by more than 90 degrees towards the closing direction until θ is less than 0 °, the second motion mechanism gives a closing moment to the smoke barrier 3; and (3) executing the closing operation of the smoke baffle plate 3, firstly controlling the driving mechanism 61 of the second movement mechanism to act along the direction of driving the smoke baffle plate 3 to close at the rotating speed omega, and after the time t (t is pi/2 omega) elapses, controlling the driving mechanism 61 of the first movement mechanism to act along the direction of driving the smoke baffle plate 3 to close at the rotating speed omega, wherein if the rotating speeds of the driving mechanism 61 of the first movement mechanism and the driving mechanism 61 of the second movement mechanism 62 are inconsistent, the angle of the smoke baffle plate 3 is consistent with the angle of the first movement mechanism, and the relative angle theta of the driving swing arm of the second movement mechanism and the rotating shaft of the motor fluctuates around 0 degrees along with the inconsistency of the rotating speeds of the two, the driving mechanism 61 of the second movement mechanism gives a small torque to the corresponding driving swing arm 62, but the opening operation of the smoke baffle plate 3 cannot be influenced because the torque is small. When the first motion mechanism reaches the full closing angle and stops rotating, the second motion mechanism keeps moving (rotating) to the closing limit position, see fig. 6 and 7, at this time, θ is-90 °, the torsion spring 66 drives the swing arm 62 to rotate in the closing direction, and the corresponding side of the auxiliary smoke barrier 3 can be closed tightly.

Through the structure and the control logic thereof, the first motion mechanism plays a main role in the opening and closing process of the smoke baffle plate 3, the second motion mechanism plays an auxiliary role, and the first motion mechanism mainly plays an auxiliary role in two states of maximum opening and tightest closing. In the process, if the rotating speeds of the driving mechanism 61 of the first movement mechanism and the driving mechanism 61 of the second movement mechanism 62 are not consistent, a large deformation torque cannot be caused to the whole smoke baffle 3.

Claims (7)

1. The utility model provides a range hood, includes collection petticoat pipe (1), air intake (12) have been seted up to the bottom of collection petticoat pipe (1), air intake (12) department is provided with and keeps off cigarette board (3) that can open and close air intake (12), range hood is still including being used for the drive to keep off the first motion of cigarette board (3) relative collection petticoat pipe (1) upset, its characterized in that:

the range hood also comprises a second motion mechanism for driving the smoke baffle plate (3) to overturn relative to the smoke collecting cover (1), the first motion mechanism and the second motion mechanism are respectively arranged on two sides of the smoke baffle plate (3) in the length direction, and both the first motion mechanism and the second motion mechanism comprise a drive mechanism (61) and a transmission mechanism for transmitting the output of the drive mechanism (61) to the smoke baffle plate (3);

the output end of the driving mechanism (61) of the second movement mechanism is connected with the input end of the transmission mechanism through the elastic piece, so that the elastic piece applies torque in the opening direction to the input end of the transmission mechanism when the smoke baffle plate (3) is in the opening state, and applies torque in the closing direction to the input end of the transmission mechanism when the smoke baffle plate (3) is closed.

2. The range hood of claim 1, wherein: the elastic component is a torsion spring (66), the driving mechanism (61) of the second movement mechanism is provided with an output shaft (611) as an output end, the periphery of the output shaft (611) is fixedly sleeved with the torsion spring (66), one end of the torsion spring (66) is fixedly connected with the output shaft (611), and the other end of the torsion spring (66) is fixedly connected with the input end of the transmission mechanism.

3. The range hood of claim 2, wherein: the transmission mechanism comprises a driving swing arm (62) serving as an input end, an executing swing arm (63) and a connecting rod (65), the first movement mechanism and the second movement mechanism further comprise a mounting seat (64) used for mounting the driving mechanism (61), the output shaft (611) is rotatably connected with the mounting seat (64), the driving swing arm (62) is fixedly connected with the output shaft (611), the driving swing arm (62) is further connected with the executing swing arm (63) through the connecting rod (65), the driving swing arm (62) and the connecting rod (65) and the executing swing arm (63) are rotatably connected, and the executing swing arm (63) is further rotatably connected with the mounting seat (64).

4. The range hood of claim 3, wherein: and two ends of the torsion spring (66) are respectively connected and fixed with the corresponding output shaft (611) and the driving swing arm (62) through screws (67).

5. The range hood of claim 4, wherein: the mounting seat (64) is provided with a rotating shaft limiting column (641) which is used for stopping a screw (67) fixed with the output shaft (611) so as to limit the rotating angle of the output shaft (611).

6. The range hood according to any one of claims 1 to 5, wherein: collection petticoat pipe (1) is including bottom plate (11) that are located the bottom, air intake (12) are seted up on bottom plate (11), after the preceding tip border of air intake (12) is located the preceding tip of bottom plate (11), when keeping off cigarette board (3) and being in the closed condition, keep off cigarette board (3) and flush with bottom plate (11) of collection petticoat pipe (1).

7. The range hood according to any one of claims 1 to 5, wherein: the driving mechanism (61) is a direct current motor.

Images