CN214621741U - Smoke exhaust ventilator - Google Patents

Abstract

The present disclosure relates to a range hood. The smoke exhaust ventilator comprises a host machine, a controller, a smoke collecting device and a smoke baffle opening and closing structure; when the smoke baffle opening and closing structure is started, a motor in the smoke baffle opening and closing structure drives a first push rod to move through a rotating shaft system, the first push rod drives a second push rod to move, the second push rod drives a connecting rod to move, the connecting rod drives a main smoke baffle to rotate to open and close, a pressure detection assembly is used for detecting the pressure between the first push rod and the second push rod in the opening and closing process of the main smoke baffle, and a rotating number detection assembly is used for detecting the rotating number of turns of the rotating shaft system; the controller is connected with the pressure detection assembly and the rotation number detection assembly and is used for controlling the opening and closing of the main smoke baffle plate according to the pressure detected by the pressure detection assembly and the rotation number detected by the rotation number detection assembly. This technical scheme can avoid for a long time through button or touch screen control owner keep off the condition that the control that the cigarette board opened and shut and cause is malfunctioning, has improved smoke ventilator's life, user experience preferred.

Description

Smoke exhaust ventilator

Technical Field

The utility model relates to an intelligence kitchen utensils and appliances technical field especially relates to a smoke ventilator.

Background

The kitchen is usually provided with a smoke exhaust ventilator to rapidly exhaust waste burned by the stove and oil smoke harmful to human bodies generated in the cooking process, and discharge the waste and the oil smoke to the outside, thereby reducing pollution, purifying air and having the safety guarantee functions of gas defense and explosion prevention.

In the related art, the range hood can control the opening and closing of the main smoke baffle plate of the range hood through a button or a touch screen and the like. However, the long-term use of the button or the touch screen to control the opening and closing of the main smoke baffle plate may overcome the condition that the sensitivity of the button or the touch screen is reduced, the button or the touch screen may be seriously failed, and the service life of the range hood is shortened.

SUMMERY OF THE UTILITY MODEL

In order to overcome the problem that exists among the correlation technique, this disclosed embodiment provides smoke ventilator. The technical scheme is as follows:

the embodiment of the disclosure provides a range hood, which comprises a host, a controller, a smoke collecting device and a smoke baffle opening and closing structure;

the host includes: the fan is arranged inside the host shell;

the smoke collecting device comprises: the smoke collection cavity bottom shell is fixedly connected with the host, and the main smoke baffle plate is rotatably connected with the smoke collection cavity bottom shell;

keep off cigarette board open and shut structure includes: the device comprises a base, a motor, a rotating shaft system, a first push rod, a second push rod, a connecting rod, a pressure detection assembly and a rotation number detection assembly;

wherein the base is fixed on the bottom shell of the smoke collection cavity; the rotating shaft system is fixed on the base and connected with the motor and the first push rod, and is used for converting the torque force of the motor into the thrust force of the first push rod; the second push rod is connected with the second push rod through the pressure detection assembly, the second push rod is connected with the connecting rod, the connecting rod is connected with the main smoke baffle plate, and the rotation number detection assembly is fixed on the rotating shaft system;

the motor drives the first push rod to move through the rotating shaft system when being started, the first push rod drives the second push rod to move, the second push rod drives the connecting rod to move, the connecting rod drives the main smoke baffle to rotate, the pressure detection assembly is used for detecting the pressure between the first push rod and the second push rod in the opening and closing processes of the main smoke baffle, and the rotating circle number detection assembly is used for detecting the rotating circle number of the rotating shaft system;

the controller is connected with the pressure detection assembly and the rotating number detection assembly and used for controlling the opening and closing of the main smoke baffle plate according to the pressure detected by the pressure detection assembly and the rotating number detected by the rotating number detection assembly.

In one embodiment, the pressure detection assembly includes a pressure sensor.

In one embodiment, the rotation number detection assembly includes a magnet fixed to a rotating portion of the rotating shaft system and a hall sensor fixed to a fixed portion of the rotating shaft system.

In one embodiment, the hall sensor is fixed on the fixing part of the rotating shaft system through a mounting seat.

In one embodiment, the main smoke baffle is rotatably connected with the smoke collection cavity bottom shell through a rotary supporting structure.

In one embodiment, the rotary supporting structure comprises a fixed part, a first rotating shaft and a rotating part, the fixed part is fixedly connected with the first rotating shaft, the rotating part is rotatably connected with the first rotating shaft, the rotating part rotates around the first rotating shaft, the fixed part is connected with the bottom shell of the smoke collection cavity, and the rotating part is connected with the main smoke baffle.

In one embodiment, the main smoke baffle is provided with a connecting piece, the connecting rod is rotatably connected with the connecting piece through a second rotating shaft, and the connecting rod drives the main smoke baffle to rotate along the second rotating shaft when rotating.

In one embodiment, the range hood further comprises: the side keeps off the cigarette board, connect collection smoke chamber drain pan with the side that the main kept off the cigarette board, the side keeps off the cigarette board and is the foldable plate.

The technical scheme provided by the embodiment of the disclosure can have the following beneficial effects:

this embodiment is through driving this owner keep off the cigarette board that the cigarette board opened and shut and set up pressure detection subassembly and rotatory number of turns detection subassembly monitors this owner and keeps off the stroke position and the atress condition of cigarette board, judges that the owner keeps off the cigarette board and whether meet the barrier at the in-process that opens and shuts to and whether receive pressure in the maximum position department of opening and control the owner keeps off opening and shutting of cigarette board, has avoided for a long time keeping off the control failure's condition that the cigarette board opened and shut and cause through button or touch screen control owner, has improved smoke ventilator's life, user experience preferred.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure.

Fig. 1 is a schematic structural view of a hood according to an exemplary embodiment.

Fig. 2 is a schematic side view of a smoke barrier opening and closing structure of a range hood according to an exemplary embodiment.

Fig. 3 is a schematic side view of a smoke barrier opening and closing structure of a range hood according to an exemplary embodiment.

Fig. 4 is a schematic bottom view of a range hood according to an exemplary embodiment.

Fig. 5 is a schematic side view of a smoke barrier opening and closing structure of a range hood according to an exemplary embodiment.

Fig. 6 is a schematic structural view of a range hood according to an exemplary embodiment.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The embodiment of the disclosure provides a range hood, and fig. 1 is a schematic structural diagram of the range hood shown according to an exemplary embodiment. As shown in fig. 1, the range hood 1 includes: a main machine 11, a controller (not shown in the figure), a smoke collecting device 12 and a smoke baffle plate opening and closing structure 13.

As shown in fig. 1, the host 11 includes: a host housing 111 and a fan (not shown) disposed inside the host housing 111; the fume collecting device 12 includes: the smoke collection cavity comprises a smoke collection cavity bottom shell 121 and a main smoke baffle plate 122, wherein the smoke collection cavity bottom shell 121 is fixedly connected with the host 11, and the main smoke baffle plate 122 is rotatably connected with the smoke collection cavity bottom shell 121; the cigarette blocking plate opening and closing structure 13 can drive the main cigarette blocking plate 122 to rotate relative to the cigarette collecting cavity bottom shell 121, and different included angles are formed between the main cigarette blocking plate and the cigarette collecting cavity bottom shell 121.

Here, when the user does not use the range hood 1, the controller can control the smoke barrier opening and closing structure 13 to rotate relative to the smoke collection chamber bottom case 121 to be close to the smoke collection chamber bottom case 121, so as to prevent the main smoke barrier 122 from obstructing the user. When the user uses this smoke ventilator 1, can control this keep off cigarette board open and shut structure 13 and drive main keep off cigarette board 122 is relative collection smoke chamber drain pan 121 rotates to form certain contained angle such as the 45 degrees angle that fig. 1 shows with this collection smoke chamber drain pan 121, and the fan produces negative pressure suction when beginning to operate simultaneously, and this negative pressure suction can be with the oil smoke that produces on the cooking utensils collection smoke chamber drain pan 121 on advance the mouth of cigarette and inhale the collection smoke chamber of smoke ventilator, and this main keep off cigarette board 122 can block the oil smoke excessive, improves the smoke extraction efficiency of this smoke ventilator.

Fig. 2 is a schematic side view of a smoke barrier opening and closing structure of a range hood according to an exemplary embodiment. Fig. 3 is a schematic side view of a smoke barrier opening and closing structure of a range hood according to an exemplary embodiment. As shown in fig. 2 and 3, the smoke barrier opening and closing structure 13 includes: the base 131, the motor 132, the rotating shaft system 133, the first push rod 134, the second push rod 135, the connecting rod 136, the pressure detecting assembly 137 and the rotation number detecting assembly 138.

As shown in fig. 2 and 3, the base 131 is fixed to the bottom shell 121 of the smoke collection cavity; the rotating shaft system 133 is fixed on the base 131, and the rotating shaft system 133 is connected to the motor 132 and the first push rod 134, and is configured to convert a torque force of the motor 132 into a thrust force of the first push rod 134; the first push rod 134 is connected to the second push rod 135 through the pressure detection assembly 137, the second push rod 135 is connected to the connecting rod 136, the connecting rod 136 is connected to the main smoke baffle 122, and the rotation number detection assembly 138 is fixed to the rotating shaft system 133.

Here, the motor 132 is connected to a rotating shaft system 133, the motor 132 can provide a driving force for the rotating shaft system 133, and the rotating shaft system 133 converts the torque of the motor 132 into the thrust of the first push rod 134, so that when the motor 132 is started, the first push rod 134 can be driven by the rotating shaft system 133 to move, the first push rod 134 drives the second push rod 135 to move, the second push rod 135 drives the connecting rod 136 to move, and the connecting rod 136 drives the main smoke baffle 122 to rotate. Thus, when the controller controls the smoke barrier opening and closing structure 13 to drive the main smoke barrier 122 to open or close, the motor 132 can be started to rotate in the corresponding direction, and the main smoke barrier 122 is further pushed to open or close by the rotating shaft system 133, the first push rod 134, the second push rod 135 and the connecting rod 136.

Here, when the smoke barrier opening and closing structure 13 is opened or closed, the first push rod 134 will push/pull the second push rod 135 through the pressure detection component 137, and at this time, the pressure detection component 137 can detect the pressure between the first push rod 134 and the second push rod 135 during the opening and closing process of the main smoke barrier 122. Meanwhile, when the smoke barrier opening and closing structure 13 is opened or closed, the rotating shaft system 133 is driven by the motor 132 to rotate, and the number of rotations of the rotating shaft system 133 can be detected by the number-of-rotations detecting assembly 138, so as to determine the stroke position of the push rod.

Here, the controller in the present disclosure may be connected to the pressure detecting assembly 137 and the rotation number detecting assembly 138, and configured to control opening and closing of the main smoke barrier 122 according to the pressure detected by the pressure detecting assembly 137 and the rotation number detected by the rotation number detecting assembly 138.

In one possible embodiment, the method for the controller to control the opening and closing of the main smoke baffle plate can be as follows:

first, preliminary measurement: measuring a relation curve between the rotation number of the rotating shaft system 133 and the stroke of the push rod, and recording as phi (n); measuring the relationship between the pressure detected by the pressure detection assembly 137 and the push rod stroke during the opening of the main smoke barrier 122, and recording as f1 (phi); measuring the relationship between the pressure detected by the pressure detection assembly 137 and the push rod stroke during the closing of the main smoke barrier 122, and recording as f2 (phi); the pressure Fmax detected by the pressure detection assembly 137 when the main smoke barrier 122 is opened to a maximum is measured.

And step two, calculating: when the controller controls the smoke barrier opening and closing structure 13 to drive the main smoke barrier 122 to open, when no obstacle exists, the pressure F1 detected by the pressure detection assembly 137 when the main smoke barrier 122 is at each stroke position is calculated through phi (N) and F1 (phi). When the controller controls the smoke barrier opening and closing structure 13 to drive the main smoke barrier 122 to close, and when no obstacle is found through phi (N) and F2 (phi), the pressure F2 detected by the pressure detection assembly 137 when the main smoke barrier 122 is at each stroke position.

Thirdly, opening and closing of the main smoke baffle 122:

the pressure F between the first push rod 134 and the second push rod 135 is measured in real time by the pressure detecting assembly 137, the stroke position phi (N) of the push rod at this time is recorded (N is the number of rotations of the rotating shaft system 133), and whether the main smoke baffle 122 is in an open state or a closed state is recorded.

When this keeps off cigarette board structure 13 and drives the process that this main cigarette board 122 opened in controller control, if at same stroke position, pressure F > F1+ F0 of pressure detection subassembly 137 real-time measurement (F0 is for presetting the threshold value, the example, this F0 can be 10N), then the controller can judge in view of the above that there is the barrier for the in-process that this main cigarette board 122 opened, can control smoke ventilator and send out the police dispatch newspaper, the main cigarette board 122 that keeps off of automatic shutdown simultaneously, prevent this barrier from damaging this main cigarette board 122.

When the controller controls the smoke baffle opening and closing structure 13 to drive the main smoke baffle 122 to close, if the pressure F measured in real time by the pressure detection component 137 is less than F2-F0 (F0 is a preset threshold value and is taken as 10N) at the same stroke position, the controller can judge that there is an obstacle in the closing process of the main smoke baffle 122 according to the pressure F, and can send out an alarm, and the main smoke baffle 122 is automatically opened at the same time, so that the main smoke baffle 122 is prevented from being damaged by the obstacle.

When the main smoke barrier 122 is opened to the maximum, i.e. N is at the maximum, the pressure F is measured in real time by the pressure detection module 137, and if F > Fmax + F0(F0 is a preset threshold, which is 10N), the main smoke barrier 122 is closed.

Using the above control method, when the main smoke baffle 122 encounters an obstacle during opening, the first push rod 134 will push the second push rod 135 with great force under the driving of the motor 132, and the second push rod 135 cannot move under the obstacle, so that the pressure between the first push rod 134 and the second push rod 135 is too great, the pressure F measured in real time by the pressure detection assembly 137 at this position will be greater than the pressure F1 without the obstacle, when F > F1+ F0(F0 is a preset threshold, for example, F0 may be 10N), the controller may automatically close the main smoke baffle 122 in order to avoid the obstacle from damaging the main smoke baffle 122 due to the push rod continuing to push; when the main smoke barrier 122 encounters an obstacle during the closing process, the first push rod 134 will strongly pull the second push rod 135 under the driving of the motor 132, and the second push rod 135 cannot move under the obstruction of the obstacle, so that the pressure between the first push rod 134 and the second push rod 135 is too small, the pressure F measured in real time by the pressure detection assembly 137 at this position will be less than the pressure F2 without the obstacle, when F < F2-F0^ (F0 is a preset threshold value, taken as 10N), in order to avoid the push rod continuing to pull and cause the obstacle to damage the main smoke barrier 122, the controller can automatically open the main smoke barrier 122; when the main smoke barrier 122 is opened to the maximum, the user only needs to press the main smoke barrier 122 lightly to make the pressure detecting assembly 137 measure the pressure F > Fmax + F0 in real time, and then the controller will control the smoke barrier opening and closing structure 13 to close the main smoke barrier 122. Just so improved the degree of automation that the main cigarette board that keeps off opened and shut and the convenience of user operation, avoided long-term through button or touch screen control main cigarette board open and shut the control malfunctioning condition that causes, improved smoke ventilator's life, user experience preferred.

In another possible embodiment, the method for the controller to control the opening and closing of the main smoke baffle 122 can be as follows:

step one, measurement and recording: during the opening of the main smoke barrier 122, the position φ (N1) (N1 is the number of rotations of the rotating shaft system 133) where the main smoke barrier 122 most easily meets the obstacle is recorded, and the pressure F1 detected by the pressure detecting assembly 137 at the position in the barrier-free state is recorded; during the closing of the main smoke barrier 122, the position φ (N2) (N2 is the number of rotations of the shaft system 133) where the main smoke barrier 122 most easily meets the obstacle is recorded, and the pressure F2 detected by the pressure detection module 137 at this position in the barrier-free state is recorded; and storing the two groups of data into a controller; the measurement records the pressure Fmax detected by the pressure detection assembly 137 when the main smoke barrier 122 is opened to a maximum.

And step two, opening and closing control of the main smoke baffle plate:

monitoring whether the main smoke baffle is in an opening process, a closing process or a maximum opening state in real time;

when this keeps off cigarette board structure 13 and drives the process that this main cigarette board 122 opened in controller control, real time monitoring motor 132 position phi (N), if phi (N) phi (N1), and this pressure detection subassembly 137 real-time measurement's pressure F > F1+ F0 this moment (F0 is for predetermineeing the threshold value, can be the value 10N), then the controller can judge in view of the above that there is the barrier for the in-process that this main cigarette board 122 opened, can control smoke ventilator and send out the police dispatch newspaper, simultaneously automatic closing main cigarette board 122, prevent this barrier from damaging this main cigarette board 122.

When the controller controls the process that the smoke baffle opening and closing structure 13 drives the main smoke baffle 122 to close, the position phi (N) of the motor 132 is monitored in real time, if phi (N) is phi (N2), and the pressure F < F2-F0 (F0^ is a preset threshold value, can be taken as 10N) measured by the pressure detection assembly 137 in real time at the moment, the controller can judge that there is an obstacle in the process that the main smoke baffle 122 closes according to the above, an alarm can be given, the main smoke baffle 122 is automatically opened at the same time, and the main smoke baffle 122 is prevented from being damaged by the obstacle.

When the main smoke barrier 122 is opened to the maximum, that is, N is the maximum, the pressure F is measured in real time by the pressure detection module 137, and if F > Fmax + F0(F0 is a preset threshold, which is 10N), the main smoke barrier 122 is closed.

Using the above control method, the pressure detection assembly 137 measures the force applied at a specific location in real time for determining whether the main smoke barrier 122 encounters an obstacle; when the main smoke barrier 122 encounters an obstacle at a specific position during opening, the pressure detected by the pressure detecting assembly 137 is too high, and if F > F1+ F0(F0 is a preset threshold, for example, the F0 may be 10N), the controller may automatically close the main smoke barrier 122 in order to prevent the obstacle from damaging the main smoke barrier 122 by the push of the push rod; when the main smoke baffle 122 encounters an obstacle at a specific position in the closing process, the pressure detected by the pressure detection component 137 is too small, if F < F2-F0^ (F0^ is a preset threshold and is taken as 10N), in order to avoid that the push rod continues to pull to cause the obstacle to damage the main smoke baffle 122, the controller can automatically open the main smoke baffle 122; when the main smoke barrier 122 is opened to the maximum, the user only needs to press the main smoke barrier 122 lightly, and the controller controls the smoke barrier opening and closing structure 13 to close the main smoke barrier 122. Just so improved the degree of automation that main cigarette board 122 opened and shut and the convenience of user operation, avoided long-term through button or touch screen control main cigarette board open and shut the control malfunctioning condition that causes, improved smoke ventilator's life, user experience preferred.

It should be noted that fig. 4 is a schematic bottom view of a range hood according to an exemplary embodiment. As shown in fig. 4, the range hood 1 may further be provided with a control panel 14, the control panel 14 may be provided with a button or a touch screen for a user to control the opening and closing of the main smoke baffle 122 of the range hood, and the user may manually control the opening and closing of the main smoke baffle 122 of the range hood through the button or the touch screen.

This embodiment is through driving this owner and keeping off the structural pressure detection subassembly 137 that sets up of cigarette board that keeps off that cigarette board 122 opens and shuts and set up in the cigarette board that keeps off structure with rotatory number of turns detection subassembly 138 monitors this owner and keeps off the stroke position and the atress condition of cigarette board 122, judges that the owner keeps off cigarette board 122 whether meet the barrier at the in-process that opens and shuts to and whether receive pressure in the maximum position department of opening and shut and control the owner keeps off opening and shutting of cigarette board 122, has avoided for a long time through button or touch screen control owner and keeps off the control malfunctioning condition that cigarette board 122 opened and shut and cause, has improved smoke ventilator's life, user experience preferred.

In a possible embodiment, the pressure detecting assembly 137 includes a pressure sensor, which senses the pressure between the first push rod 134 and the second push rod 135 and converts the pressure signal into an electrical signal according to a certain rule. The electrical pressure signal detected by the pressure sensor in this disclosure is output to the controller.

In one possible embodiment, fig. 5 is a schematic side view of a smoke barrier opening and closing structure of a range hood according to an exemplary embodiment. As shown in fig. 5, the rotation-number detecting assembly 138 includes a magnet 1381 and a hall sensor 1382, the magnet 1381 is fixed to a rotating portion, such as a rotating shaft, of the rotating shaft system 133 and can rotate along with the rotation of the rotating portion of the rotating shaft system 133, and the hall sensor 1382 is fixed to a fixed portion, such as a housing of the rotating shaft system 133, of the rotating shaft system 133. Thus, when the magnet 1381 rotates to approach the hall sensor 1382 along with the rotating part, the magnetic induction intensity changes, the hall sensor 1382 can convert the magnetic induction intensity changes into the changes of the electric signals, the number of the changes of the electric signals is the number of the rotating turns of the rotating shaft system 133, the number of the rotating turns of the rotating shaft system 133 can be detected through the magnet 1381 and the hall sensor 1382, and the detection is simple to realize and low in cost.

In a possible embodiment, as shown in fig. 5, the hall sensor 1382 is fixed to the fixed portion of the rotating shaft system 133 by a mounting base 1383, so as to facilitate the mounting and fixing of the hall sensor 1382.

In one possible embodiment, as shown in fig. 4, the main smoke baffle 122 is rotatably connected to the smoke collecting cavity bottom case 121 by a rotary support structure 15, for example, the rotary support structure 15 may be a hinge or the like.

In a possible embodiment, the rotating support structure includes a fixing member, a first rotating shaft and a rotating member, the fixing member is fixedly connected to the first rotating shaft, the rotating member is rotatably connected to the first rotating shaft, the rotating member rotates around the first rotating shaft, the fixing member is connected to the bottom shell 121 of the smoke collection chamber, and the rotating member is connected to the main smoke baffle 122, so that the main smoke baffle 122 can rotate around the first rotating shaft to change an included angle with the bottom shell 121 of the smoke collection chamber, thereby realizing the opening and closing of the main smoke baffle 122.

In one possible embodiment, fig. 6 is a schematic structural view of a range hood according to an exemplary embodiment. As shown in fig. 6, a connecting piece 1221 is arranged on the main smoke baffle 122, the connecting rod 136 is rotatably connected to the connecting piece 1221 through a second rotating shaft, and the connecting rod 136 drives the main smoke baffle 122 to rotate along the second rotating shaft, so that an included angle between the connecting rod 136 and the main smoke baffle 122 is also changed, and the main smoke baffle 122 is opened and closed.

In one possible embodiment, as shown in fig. 6, the smoking machine 1 may further include a side smoke barrier 16 disposed between the main smoke barrier 122 and the bottom case 121 of the smoke collecting cavity, the side smoke barrier 16 connects the main smoke barrier 122 and the side edge of the bottom case 121 of the smoke collecting cavity, the side smoke barrier 16 is a foldable plate, when the main smoke barrier 122 of the smoking machine is rotated to open, the side smoke barrier 16 may be correspondingly extended, and when the main smoke barrier 122 of the smoking machine is rotated to close, the side smoke barrier 16 may be correspondingly extended and folded.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims (8)

1. A range hood is characterized by comprising a host, a controller, a smoke collecting device and a smoke baffle opening and closing structure;

the host includes: the fan is arranged inside the host shell;

the smoke collecting device comprises: the smoke collection cavity bottom shell is fixedly connected with the host, and the main smoke baffle plate is rotatably connected with the smoke collection cavity bottom shell;

keep off cigarette board open and shut structure includes: the device comprises a base, a motor, a rotating shaft system, a first push rod, a second push rod, a connecting rod, a pressure detection assembly and a rotation number detection assembly;

wherein the base is fixed on the bottom shell of the smoke collection cavity; the rotating shaft system is fixed on the base and connected with the motor and the first push rod, and is used for converting the torque force of the motor into the thrust force of the first push rod; the second push rod is connected with the second push rod through the pressure detection assembly, the second push rod is connected with the connecting rod, the connecting rod is connected with the main smoke baffle plate, and the rotation number detection assembly is fixed on the rotating shaft system;

the motor drives the first push rod to move through the rotating shaft system when being started, the first push rod drives the second push rod to move, the second push rod drives the connecting rod to move, the connecting rod drives the main smoke baffle to rotate, the pressure detection assembly is used for detecting the pressure between the first push rod and the second push rod in the opening and closing processes of the main smoke baffle, and the rotating circle number detection assembly is used for detecting the rotating circle number of the rotating shaft system;

the controller is connected with the pressure detection assembly and the rotating number detection assembly and used for controlling the opening and closing of the main smoke baffle plate according to the pressure detected by the pressure detection assembly and the rotating number detected by the rotating number detection assembly.

2. The range hood of claim 1, wherein the pressure detection assembly comprises a pressure sensor.

3. The range hood of claim 1, wherein the rotation number detection assembly comprises a magnet fixed to a rotating portion of the rotating shaft system and a hall sensor fixed to a stationary portion of the rotating shaft system.

4. The range hood of claim 3,

the Hall sensor is fixed on the fixing part of the rotating shaft system through the mounting seat.

5. The range hood of claim 1,

the main smoke baffle is rotatably connected with the smoke collection cavity bottom shell through a rotary supporting structure.

6. The range hood of claim 5,

rotatory bearing structure includes mounting, first pivot and rotating member, the mounting with first pivot fixed connection, the rotating member with first pivot swivelling joint, the rotating member winds first pivot is rotatory, the mounting is connected collection cigarette chamber drain pan, the rotating member is connected main cigarette board that keeps off.

7. The range hood of claim 1, wherein the main smoke baffle is provided with a connecting member, the connecting rod is rotatably connected to the connecting member through a second rotating shaft, and the connecting rod drives the main smoke baffle to rotate along the second rotating shaft.

8. The range hood of claim 1, further comprising:

the side keeps off the cigarette board, connect collection smoke chamber drain pan with the side that the main kept off the cigarette board, the side keeps off the cigarette board and is the foldable plate.

Images