Vibration damping device and smoke exhaust system

Abstract

The utility model discloses a vibration damping device and a smoke exhaust system, the vibration damping device can reduce the vibration intensity of an air outlet pipe in the smoke exhaust system, the vibration damping device comprises: a vibration detection mechanism, which is in contact with the air outlet pipe and is used for obtaining the vibration direction and the vibration amplitude of the air outlet pipe; the vibration stopping mechanism is arranged on one side of the air outlet pipe and used for generating reverse vibration waves opposite to the vibration direction; the fixing bracket is used for fixing and supporting the vibration detection mechanism and the vibration stopping mechanism; the controller comprises a vibration signal input end and a control signal output end; the vibration signal input end is connected with the output end of the vibration detection mechanism, and the control signal output end is connected with the control end of the vibration stopping mechanism. By the adoption of the technical scheme, vibration generated at the air outlet pipe can be reduced or eliminated, and the smoke exhaust effect of the smoke exhaust system is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of household appliances, in particular to a vibration reduction device and a smoke exhaust system. Background Art

[0002] During the process of cooking food, a certain amount of oil smoke will be produced. By controlling the operation of the range hood, the range hood can discharge the oil smoke to the public exhaust duct through the outlet pipe, and then be discharged by the public exhaust duct to prevent the presence of oil smoke from affecting the physical and mental health of users.

[0003] However, during the operation of the range hood, the friction, shaking, collision, etc. of its various components will cause the air outlet duct to vibrate, and a certain amount of noise will be generated when the air outlet duct vibrates. When the air outlet duct vibrates strongly, the air outlet duct will be displaced to a certain extent, which will affect the sealing effect of the connection between the air outlet duct and the air outlet of the range hood, as well as the connection between the air outlet duct and the public smoke exhaust duct. In severe cases, the sealing structure of the connection between the air outlet duct, the air outlet of the range hood and the public smoke exhaust duct will be destroyed, allowing oil smoke to enter the room, affecting the smoke exhaust effect. Utility Model Content

[0004] The utility model provides a vibration reduction device and a smoke exhaust system, which can reduce or eliminate the vibration generated at the air outlet pipe, reduce the noise generated during the operation of the smoke exhaust machine in the smoke exhaust system, and ensure the smoke exhaust effect of the smoke exhaust system.

[0005] In a first aspect, the utility model provides a vibration reduction device, which is applied to a smoke exhaust system and is used to reduce the vibration of an air outlet pipe in the smoke exhaust system. The vibration reduction device includes:

[0006] A vibration detection mechanism, in contact with the air outlet pipe, for obtaining the vibration direction and vibration amplitude of the air outlet pipe;

[0007] A vibration prevention mechanism is arranged on one side of the air outlet pipe and is used to generate a reverse vibration wave opposite to the vibration direction;

[0008] A fixing bracket, used for supporting and fixing the vibration detection mechanism and the vibration prevention mechanism;

[0009] The controller comprises a vibration signal input terminal and a control signal output terminal; the vibration signal input terminal is connected to the output terminal of the vibration detection mechanism, and the control signal output terminal is connected to the control terminal of the vibration prevention mechanism.

[0010] Optionally, the fixed bracket includes an annular portion and a fixed portion; the annular portion is fixedly connected to the fixed portion;

[0011] The inner side of the annular portion is used to place the air outlet pipe;

[0012] The vibration preventing mechanism and the vibration detecting mechanism are both arranged on the annular portion.

[0013] Optionally, the annular portion includes an inner annular structure and an outer annular structure surrounding the inner annular structure;

[0014] A slide rail is arranged on the outer ring structure; a vibration prevention mechanism is arranged between the inner ring structure and the outer ring structure, and a part of the vibration prevention mechanism is located in the slide rail;

[0015] The vibration prevention mechanism is also used to move around the inner ring structure along the slide rail.

[0016] Optionally, the vibration reduction device further comprises: a driving mechanism;

[0017] The controller also includes a drive signal output terminal; the control terminal of the drive mechanism is connected to the drive signal output terminal;

[0018] The driving mechanism is also mechanically connected to the vibration prevention mechanism; the driving mechanism is used to drive the vibration prevention mechanism to move along the slide rail around the inner ring structure.

[0019] Optionally, a groove is provided on a side of the fixing portion facing away from the annular portion;

[0020] The driving mechanism is arranged in the groove.

[0021] Optionally, the vibration detection mechanism includes a plurality of pressure detectors;

[0022] The pressure detectors are distributed on the inner surface of the annular portion.

[0023] Optionally, the pressure detector includes an elastic member and a pressure sensing sensor;

[0024] The pressure sensing sensor is used to obtain the deformation amount and / or elastic force of the elastic member.

[0025] Optionally, the pressure detectors are symmetrically arranged in pairs on the inner surface of the annular portion.

[0026] Optionally, the vibration prevention mechanism includes a vibration exciter.

[0027] In a second aspect, the utility model further provides a smoke exhaust system, which comprises: a smoke machine, an air outlet pipe and the vibration reduction device of the first aspect;

[0028] The air outlet of the range hood is connected to the public smoke exhaust duct through the air outlet pipe;

[0029] The air outlet pipe is sleeved in a fixed bracket of the vibration reduction device.

[0030] The technical solution of the utility model is to arrange the vibration detection mechanism and the vibration prevention mechanism on a fixed bracket, and the vibration detection mechanism is directly structured with the air outlet pipe, so that the vibration detection mechanism can be used to accurately detect the vibration direction and vibration amplitude of the air outlet pipe, and provide the detected vibration direction and vibration amplitude to the vibration signal input end of the controller, so that the control signal output end of the controller can output a corresponding vibration control signal to the vibration prevention mechanism, and control the vibration prevention mechanism to generate a reverse vibration wave, so that the reverse vibration wave can offset or reduce the vibration generated by the air outlet pipe itself, thereby reducing or eliminating the noise generated by the vibration of the air outlet pipe, improving the damage caused by the vibration of the air outlet pipe to the sealing structure at the connection between the two ends of the air outlet pipe, and thus being beneficial to improving the smoke exhaust effect of the smoke exhaust system. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a structural block diagram of a vibration reduction device provided by an embodiment of the utility model;

[0032] Figure 2 It is a structural schematic diagram of a smoke exhaust system provided by an embodiment of the utility model;

[0033] Figure 3 It is a structural schematic diagram of a vibration reduction device provided by an embodiment of the utility model;

[0034] Figure 4 It is a structural block diagram of another vibration reduction device provided in an embodiment of the utility model. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be fully described below in combination with the drawings in the embodiments of the utility model through specific implementation methods. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all of the embodiments. Various modifications and changes can be made in the utility model without departing from the spirit or scope of the utility model, which is obvious to those skilled in the art. Therefore, the utility model is intended to cover modifications and changes of the utility model that fall within the scope of the corresponding claims (technical solutions claimed for protection) and their equivalents.

[0036] Moreover, the words "first", "second" and similar words used in the embodiments of the present disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "one", "one" or "the" do not indicate a quantity limitation, but indicate the existence of at least one. Words such as "include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Words such as "connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly. In addition, the descriptions of the same, equal, etc. involved in the embodiments of the present disclosure do not mean that the two objects are completely equal in size and shape, and are allowed to be roughly the same or roughly equal within a certain error range.

[0037] It should be noted that the implementation methods provided in the embodiments of the present utility model can be combined with each other if there is no contradiction.

[0038] The utility model provides a vibration reduction device, which can be applied to a smoke exhaust system to reduce the vibration of an air outlet pipe in the smoke exhaust system. Figure 1 and 2 As shown, the vibration reduction device 10 includes: a vibration detection mechanism 110, a vibration prevention mechanism 120, a fixed bracket 130 and a controller 140; the vibration detection mechanism 110 is in contact with the air outlet duct 20, and is used to obtain the vibration direction and vibration amplitude of the air outlet duct 20; the vibration prevention mechanism 120 is arranged on one side of the air outlet duct 20, and is used to generate a reverse vibration wave opposite to the vibration direction and vibration amplitude; the fixed bracket 130 is used to support and fix the vibration detection mechanism 110 and the vibration prevention mechanism 120; the controller 140 includes a vibration signal input terminal and a control signal output terminal, the vibration signal input terminal is connected to the output terminal of the vibration detection mechanism 110, and the control signal output terminal is connected to the control terminal of the vibration prevention mechanism 120.

[0039] It is understandable that if Figure 2As shown, in addition to the air outlet pipe 20, the smoke exhaust system 100 may also include a range hood 30. During the operation of the range hood 30, a certain oil fume absorption capacity is generated, so that the oil fume enters the range hood 30 and is discharged to the air outlet pipe 20 through the range hood 30; because the air outlet pipe 20 is connected to the public smoke exhaust duct, the oil fume entering the air outlet pipe 20 can be discharged to the public smoke exhaust duct through the air outlet pipe 20, and then discharged to the outdoors through the public smoke exhaust duct. Among them, during the operation of the range hood 30, the various components inside it will vibrate due to friction, collision, shaking, etc., so that the air outlet pipe 20 connected to the air outlet of the range hood 30 will also vibrate to a certain extent; at the same time, during the process of the range hood 30 absorbing oil smoke, its internal pressure is constantly changing, so that the pressure in the air outlet pipe 20 will also change accordingly. The change in pressure will also cause the air outlet pipe 20 to vibrate to a certain extent. When the air outlet pipe 20 vibrates, it will generate a certain noise. When the noise is large, it will make the user feel uncomfortable, thereby affecting the user's experience; at the same time, the air outlet pipe 20 exists between the public smoke exhaust duct and the range hood 30 as a separate component. One end of the air outlet pipe 20 needs to be sealed and connected to the air outlet of the range hood 30, and the other end of the air outlet pipe 20 needs to be sealed and connected to the public smoke exhaust duct. When the vibration of the air outlet pipe 20 is strong, it will cause tension at the connection between it and the air outlet of the range hood 30 and the public smoke exhaust duct, causing air leakage at the connection, thereby causing the oil smoke to spread in the environment where it is located, affecting the smoke exhaust effect of the smoke exhaust system 100.

[0040] To solve the above problems, refer to Figure 1 and Figure 2 The vibration reduction device 10 provided in this embodiment can reduce or eliminate the vibration generated by the air outlet duct 20. The vibration detection mechanism 110 in the vibration reduction device 10 can be in direct contact with the air outlet duct 20, so that it can directly obtain the vibration direction and vibration amplitude of the air outlet duct 20 when it vibrates. The vibration direction and vibration amplitude can be output to the vibration signal input end of the controller 140 in the form of vibration parameters, so that the controller 140 can determine the specific vibration direction and vibration amplitude of the air outlet duct 20 according to the vibration parameters, and based on the determined vibration direction and vibration amplitude, the control signal output end of the controller 140 outputs a corresponding vibration control signal, and the vibration control signal can control the working state of the vibration prevention mechanism 120, so that the vibration prevention structure 120 generates a reverse vibration wave that is opposite to the vibration direction of the air outlet duct 20 and equivalent to the vibration amplitude of the air outlet duct 20, and the reverse vibration wave can offset part or all of the vibration generated by the air outlet duct 20 itself, thereby achieving the purpose of reducing or eliminating the vibration generated by the air outlet duct 20.

[0041] In addition, when the air outlet duct 20 vibrates, the vibration detection mechanism 110 and the vibration prevention mechanism 20 that are in direct contact with the air outlet duct 20 will move, resulting in the vibration detection mechanism 110 being unable to accurately detect the vibration direction and vibration amplitude of the air outlet duct 20, and being unable to accurately act the reverse vibration wave generated by the vibration prevention mechanism 120 on the air outlet duct 20. At this time, by providing a fixed bracket 130 in the vibration reduction device 10, the fixed bracket 130 can play a certain role in fixing and supporting the vibration detection mechanism 110 and the vibration prevention mechanism 120 to prevent the vibration detection mechanism 110 and the vibration prevention mechanism 120 from moving, thereby ensuring that the vibration detection mechanism 110 can accurately detect the vibration direction and vibration amplitude of the air outlet duct 20, and ensuring that the reverse vibration wave generated by the vibration prevention mechanism 120 accurately acts on the air outlet duct 20.

[0042] In this embodiment, the vibration detection mechanism and the vibration prevention mechanism are arranged on a fixed bracket, and the vibration detection mechanism is directly structured with the air outlet pipe, so that the vibration detection mechanism can be used to detect the vibration direction and vibration amplitude of the air outlet pipe, and the detected vibration direction and vibration amplitude are provided to the vibration signal input end of the controller, so that the control signal output end of the controller can output a corresponding vibration control signal to the vibration prevention mechanism, and control the vibration prevention mechanism to generate a reverse vibration wave, so that the reverse vibration wave can offset or reduce the vibration generated by the air outlet pipe itself, thereby reducing or eliminating the noise generated by the vibration of the air outlet pipe, improving the damage to the sealing structure at the connection between the two ends of the air outlet pipe caused by the vibration of the air outlet pipe, and thus being beneficial to improving the smoke exhaust effect of the smoke exhaust system.

[0043] Optional, combined with reference Figure 1 and Figure 3 As shown, the fixed bracket 130 includes an annular portion 131 and a fixed portion 132; the annular portion 131 is fixedly connected to the fixed portion 132; the inner side of the annular portion 131 is used to place the air outlet duct; the vibration prevention mechanism 120 and the vibration detection mechanism 110 are both arranged on the annular portion 131.

[0044] It is understandable that the annular portion 131 is fixedly connected to the fixing portion 132, so that the annular portion 131 and the fixing portion 132 can be an integral structure, or the annular portion 131 and the fixing portion 132 can be connected by welding, or the annular portion 131 and the fixing portion 132 can also be fixedly connected by fasteners. Under the premise that the annular portion 131 and the fixing portion 132 can be fixedly connected, the embodiment of the utility model does not specifically limit the connection method of the annular portion 131 and the fixing portion 132.

[0045] Among them, the inner side of the annular portion 131 is a hollow shape, and the hollow shape can be consistent with the shape of the air outlet pipe, that is, when the cross-section of the air outlet pipe is circular, the hollow shape of the inner side of the annular portion 131 can also be circular, and the circular diameter of the hollow shape should be larger than the cross-sectional diameter of the air outlet pipe, so that the air outlet pipe will not be deformed when installed on the inner side of the annular portion 131, ensuring that the air outlet pipe has a large gas flow rate. At the same time, the vibration detection mechanism 110 and the vibration prevention mechanism 120 are both arranged on the annular portion 131, so that the vibration detection mechanism 110 can directly contact the air outlet pipe placed on the inner side of the annular portion 131, so as to accurately detect the vibration direction and vibration amplitude of the air outlet pipe, and at the same time, the vibration prevention mechanism 120 can directly act on the air outlet pipe with the reverse vibration wave it generates, or act on the air outlet pipe through the annular portion 131, so as to quickly and accurately reduce or eliminate the vibration generated by the air outlet pipe itself.

[0046] The fixing portion 132 can be fixed to any non-movable structure in the environment where the air outlet duct is located, such as Figure 2 As shown, when the air outlet duct 20 is in the suspended ceiling of the kitchen, the fixing portion 132 can be fixed on the suspended ceiling, or, when the air outlet duct 20 is in a cabinet, the fixing portion 132 can be fixed on the partition or wall panel of the cabinet, or, the fixing portion 132 can also be fixed on the wall of the kitchen, etc., to ensure that the annular portion 131 connected to the fixing portion 132 will not be displaced due to the vibration of the air outlet duct 20, and at the same time, the displacement degree of the air outlet duct 20 can be limited.

[0047] Optional, continue to refer to Figure 3 The vibration detection mechanism 110 includes a plurality of pressure detectors; each pressure detector is distributed on the inner surface of the annular portion 131 .

[0048] Among them, the pressure detector can detect the size of the pressure generated by the annular portion 131 and / or the pressure detector when the air outlet pipe vibrates, so as to determine the vibration direction and vibration amplitude of the air outlet pipe according to the size and direction of the pressure; at the same time, because the vibration detection mechanism 110 includes multiple pressure detectors, and each pressure detector is distributed on the inner surface of the annular portion 131, so that the air outlet pipe placed on the inner side of the annular portion 131 is provided with pressure detectors in various directions around the air outlet pipe, at this time, according to the position of the pressure detector that detects the pressure generated when the air outlet pipe vibrates, the specific position where the air outlet pipe vibrates can be determined. In this way, by arranging multiple pressure detectors on the inner surface of the annular portion 131, the vibration direction and vibration amplitude of the air outlet pipe can be detected at the same time by adopting a simple structure and setting method, which is conducive to the low cost of the vibration reduction device.

[0049] It is understandable that the pressure detectors can be evenly distributed on the inner surface of the annular portion 131, so that the pressure at various positions inside the annular portion 131 can be detected. In an optional embodiment, the pressure detectors can be symmetrically arranged on the inner surface of the annular portion 131 in pairs, so that the two symmetrical pressure detectors can respectively detect the pressure in two opposite directions, so that the vibration direction of the air outlet duct and the vibration amplitude in its vibration direction can be accurately determined.

[0050] Optional, continue to refer to Figure 3 The pressure detector includes an elastic member 111A and a pressure sensing sensor (not shown in the figure); the pressure sensing sensor can obtain the deformation amount or elastic force of the elastic member 111A.

[0051] Among them, the elastic member 111A may include a spring, etc. When the air outlet duct vibrates, a certain pressure will be applied to the elastic member 111A, so that the elastic member 111A is deformed by pressure / tension and has a certain deformation amount. In order to overcome this deformation amount, the elastic member 111A will generate an elastic force in the opposite direction of its pressure / tension. At this time, the pressure sensing detection sensor can determine the deformation amount of the elastic member 111A by real-time detection of the size of the elastic member 111A in its deformation direction, and comparing the detected size with the size of the elastic member 111A when it is not under pressure / tension. Alternatively, the pressure sensing detection sensor can also directly detect the size and direction of the elastic force generated by the elastic member 111A, so as to determine the vibration amplitude and vibration direction of the air outlet duct according to the size and direction of the detected elastic force.

[0052] In an optional embodiment, to facilitate the detection of the vibration direction and amplitude of the air outlet duct, when the air outlet duct is placed on the inner side of the annular portion 131, the side of the elastic member away from the inner surface of the annular portion 131 abuts against the air outlet duct, so that when the air outlet duct vibrates, the vibration amplitude and direction of the air outlet duct can be detected quickly and accurately.

[0053] In addition, when the air outlet duct vibrates, the air outlet duct will generate a compressive / tensile force on the elastic member 111A, and the elastic member 111A will generate an elastic force in the opposite direction of the compressive / tensile force it is subjected to. This elastic force acts on the air outlet duct to reduce the vibration amplitude of the air outlet duct to a certain extent, which serves as a primary vibration reduction for the air outlet duct. Subsequently, the vibration prevention mechanism 120 can be controlled by the controller to start working, so as to perform a secondary vibration reduction on the air outlet duct.

[0054] Optional, continue to refer to Figure 3The annular portion 131 includes an inner ring structure 131A and an outer ring structure 131B surrounding the inner ring structure 131A; a slide rail is arranged on the outer ring structure 131B; the vibration prevention mechanism 120 is arranged between the inner ring structure 131A and the outer ring structure 131B, and part of the vibration prevention mechanism 120 is located in the slide rail 1301; the vibration prevention mechanism 120 is also used to move around the inner ring structure 131A along the slide rail 1301.

[0055] In an optional embodiment, the vibration prevention mechanism 120 may include a vibration exciter. Thus, by arranging the vibration exciter in the vibration prevention mechanism and controlling the vibration exciter to generate a vibration amount of a certain direction and magnitude, the vibration amount is opposite to the vibration direction of the air outlet pipe and is equal to the vibration amplitude of the air outlet pipe, that is, the vibration amplitude of the air outlet pipe can be offset or reduced.

[0056] Among them, the vibration prevention mechanism 120 can run along the slide rail 1301 around the inner ring structure 131A, so that the vibration prevention mechanism 120 can move according to the specific vibration direction of the air outlet duct, so that the arrangement direction of the vibration prevention mechanism 120 and the air outlet duct can be consistent with the vibration direction of the air outlet duct, so that the reverse vibration wave generated by the vibration prevention structure can directly act in the vibration direction, so as to minimize the vibration amplitude of the air outlet duct.

[0057] Based on the above embodiments, Figure 3 and Figure 4 The vibration reduction device 10 may further include a driving mechanism 150; at this time, the controller 140 may further include a driving signal output end, which is connected to the control end of the driving mechanism 150; the driving mechanism 150 is also mechanically connected to the vibration prevention mechanism 120; the driving mechanism 150 is used to drive the vibration prevention mechanism 120 to move along the slide rail around the inner ring structure.

[0058] Among them, the driving mechanism 150 can be composed of a driving motor and a driving circuit, etc. At this time, the driving signal output end of the controller 140 can be directly electrically connected to the input end of the driving circuit through a wire or wirelessly connected, and can be designed according to actual needs. The embodiment of the utility model does not specifically limit this. The controller 140 can output a corresponding driving control signal to the driving circuit, so that the driving circuit provides an electrical signal to the driving motor under the control of the driving control signal received by it to control the rotation of the driving motor. The output shaft of the driving motor can be mechanically connected to the vibration prevention mechanism 120 through a corresponding driving rod, etc., so that when the driving motor rotates, the corresponding driving force can be transmitted to the vibration prevention mechanism 120 through the driving rod, so that the vibration prevention mechanism 120 can be driven to move around the inner ring structure 131A along the slide rail 1301.

[0059] As a feasible embodiment, in combination with reference Figure 2-4 When the exhaust system 100 is working, the air outlet duct 20 will generate a certain vibration, and the vibration force is fed back to the inner surface of the inner ring structure 131A through the elastic member 111A. The pressure sensing detection sensor on the inner ring structure 131A can respectively obtain the elastic force fed back by each elastic member 111A, so as to determine the vibration amplitude and vibration direction of the air outlet duct 20 according to the elastic force fed back by each elastic member 111A, and feed back the detected vibration amplitude and vibration direction to the controller 140 in the form of vibration parameters, so that the controller 140 can determine whether to start the vibration prevention mechanism 120 and the driving mechanism 150 according to the vibration parameters it receives. For example, when the controller 140 determines according to the vibration parameters that the vibration amplitude of the air outlet duct 20 in a certain vibration direction exceeds the set amplitude, it is necessary to control the vibration prevention mechanism 120 to start the vibration prevention mechanism 150 for the vibration direction. The vibration amplitude in the vibration direction is suppressed; at this time, the controller 140 can determine the vibration direction of the air outlet duct with the largest vibration amplitude according to the vibration parameters corresponding to the elastic member 111A; the controller 140 can first provide a certain driving control signal to the driving mechanism 150, so that the driving mechanism 150 drives the vibration prevention mechanism 120 to move to the corresponding position along the slide rail, so that the arrangement direction of the vibration prevention mechanism 120 and the air outlet duct can be consistent with the vibration direction with the maximum vibration amplitude. At this time, the controller 140 can provide a corresponding vibration control signal to the vibration prevention mechanism 120, so that the vibration prevention mechanism 120 can generate a reverse vibration wave opposite to the vibration direction of the maximum vibration amplitude, thereby offsetting or reducing the vibration amplitude in this vibration direction, thereby achieving the purpose of reducing the vibration of the air outlet duct 20.

[0060] In an optional embodiment, if Figure 3 As shown, a groove is provided on the side of the fixing portion 132 away from the annular portion 131; the driving mechanism 150 is arranged in the groove, so that no additional space is required for setting the driving mechanism 150, which is conducive to simplifying the structure of the vibration reduction device and miniaturizing the vibration reduction device.

[0061] Based on the same utility model concept, the utility model embodiment also provides a smoke exhaust system, such as Figure 2 As shown, the smoke exhaust system 100 includes: a range hood 30, an air outlet pipe 20 and a vibration reduction device 10 provided by the present invention; wherein the air outlet of the range hood 30 is connected to a common smoke exhaust duct through the air outlet pipe 20; the air outlet pipe 20 is sleeved in a fixed bracket 130 of the vibration reduction device 10.

[0062] It is understandable that the smoke exhaust system includes any one of the vibration reduction devices provided in the above embodiments. Therefore, the smoke exhaust system also has the beneficial effects of the vibration reduction devices in the above embodiments. The similarities can be understood by referring to the above explanation of the display panel, and will not be repeated below.

[0063] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention is described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A vibration reduction device, used in a smoke exhaust system, for reducing the vibration of an air outlet pipe in the smoke exhaust system, characterized in that: include: A vibration detection mechanism, in contact with the air outlet pipe, for obtaining the vibration direction and vibration amplitude of the air outlet pipe; A vibration prevention mechanism, disposed on one side of the air outlet pipe, for generating a reverse vibration wave in the opposite direction to the vibration direction; A fixing bracket, used for supporting and fixing the vibration detection mechanism and the vibration prevention mechanism; The controller comprises a vibration signal input terminal and a control signal output terminal; the vibration signal input terminal is connected to the output terminal of the vibration detection mechanism, and the control signal output terminal is connected to the control terminal of the vibration prevention mechanism.

2. The vibration reduction device according to claim 1, characterized in that: The fixing bracket comprises an annular portion and a fixing portion; the annular portion is fixedly connected to the fixing portion; The inner side of the annular portion is used for placing the air outlet pipe; The vibration preventing mechanism and the vibration detecting mechanism are both arranged on the annular portion.

3. The vibration reduction device according to claim 2, characterized in that: The annular portion includes an inner ring structure and an outer ring structure surrounding the inner ring structure; The outer ring structure is provided with a slide rail; the vibration prevention mechanism is provided between the inner ring structure and the outer ring structure, and a portion of the vibration prevention mechanism is located in the slide rail; The vibration prevention mechanism is also used to move around the inner ring structure along the slide rail.

4. The vibration reduction device according to claim 3, characterized in that: Also includes: Driving mechanism; The controller also includes a drive signal output terminal; the control terminal of the drive mechanism is connected to the drive signal output terminal; The driving mechanism is also mechanically connected to the vibration prevention mechanism; the driving mechanism is used to drive the vibration prevention mechanism to move along the slide rail around the inner ring structure.

5. The vibration reduction device according to claim 4, characterized in that: A groove is provided on one side of the fixing portion away from the annular portion; The driving mechanism is arranged in the groove.

6. The vibration reduction device according to claim 2, characterized in that: The vibration detection mechanism includes a plurality of pressure detectors; The pressure detectors are distributed on the inner surface of the annular portion.

7. The vibration reduction device according to claim 6, characterized in that: The pressure detector includes an elastic member and a pressure sensing sensor; The pressure sensing sensor is used to obtain the deformation amount and / or elastic force of the elastic member.

8. The vibration reduction device according to claim 6, characterized in that: The pressure detectors are symmetrically arranged in pairs on the inner surface of the annular portion.

9. The vibration reduction device according to claim 1, characterized in that: The vibration prevention mechanism includes a vibration exciter.

10. A smoke exhaust system, characterized in that: include: A range hood, an air outlet pipe and a vibration reduction device according to any one of claims 1 to 9; The air outlet of the range hood is connected to the public smoke exhaust duct through the air outlet pipe; The air outlet pipe is sleeved in the fixing bracket of the vibration reduction device.

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