Air door adjusting device, gas stove and air door adjusting control method and device

Abstract

The invention relates to the technical field of gas stoves, and discloses an air door adjusting device, a gas stove, an air door adjusting control method and an air door adjusting control device. The air door rotating sheet is provided with a second air inlet hole; the ultrasonic motor comprises piezoelectric ceramics and an ultrasonic motor stator, the piezoelectric ceramics make contact with the ultrasonic motor stator, the ultrasonic motor stator makes contact with the air door rotating piece, and the air door rotating piece can rotate relative to the air door fixing piece under driving of the ultrasonic motor stator. After a certain period of sine excitation signals with the phase difference ranging from 70 degrees to 110 degrees are applied to piezoelectric ceramics, the rotating angle of the air door rotating piece can be very small, and therefore the air door can be adjusted more accurately.

Description

Technical Field

[0001] The present invention relates to the technical field of gas stoves, and in particular to a damper regulating device and a damper regulating control method and a control device. Background Art

[0002] Gas stoves are one of the indispensable cooking appliances in modern kitchens. In order to ensure the best combustion effect and flame stability, gas stoves are designed with a damper structure, whose main function is to adjust the amount of air entering the burner, thereby optimizing the combustion process.

[0003] The damper adjustment of traditional gas stoves mostly relies on manual operation by users, which increases the complexity of operation and affects the smoothness of the cooking process. At the same time, the damper adjustment accuracy is limited, which may lead to incomplete combustion, reduce energy utilization, and increase the emission of harmful gases. Summary of the invention

[0004] In view of this, the present invention provides a damper adjustment device, a gas stove, a damper adjustment control method, and a control device to solve the problem of limited damper adjustment accuracy in the related art.

[0005] In a first aspect, the present invention provides a damper adjustment device, comprising:

[0006] The air door fixing plate has a first air inlet hole;

[0007] The air door rotating piece has a second air inlet hole;

[0008] The ultrasonic motor comprises a piezoelectric ceramic and an ultrasonic motor stator, wherein the piezoelectric ceramic contacts the ultrasonic motor stator, the ultrasonic motor stator contacts the damper rotating piece, and the damper rotating piece can rotate relative to the damper fixed piece under the drive of the ultrasonic motor stator.

[0009] Beneficial effect: When a sinusoidal excitation signal with a phase difference of 70°-110° is applied to the piezoelectric ceramics at a certain period, the center of gravity of the positive and negative charges inside the piezoelectric ceramic crystal will shift, causing the crystal to deform. This deformation is called the inverse piezoelectric effect. The crystal deformation will cause the surface of the ultrasonic motor stator to vibrate, thereby driving the damper rotating piece to rotate through friction, and then adjusting the size of the overlap between the second air inlet hole on the damper rotating piece and the first air inlet hole on the damper fixed piece, so as to adjust the primary air coefficient. The air passes through the second air inlet hole and the first air inlet hole and mixes with the gas.

[0010] The damper adjustment device drives the damper rotating piece to rotate by an ultrasonic motor, without the need for an additional transmission structure, and has a simple structure and a small number of parts. Moreover, after applying a sinusoidal excitation signal with a phase difference of 70°-110° for a certain period to the piezoelectric ceramic, the damper rotating piece can rotate at a very small angle, thereby enabling more accurate damper adjustment.

[0011] In an optional embodiment, the stator of the ultrasonic motor includes a plurality of convex teeth distributed at intervals along the circumferential direction, and the convex teeth are in contact with the damper rotating blades.

[0012] Beneficial effects: The ultrasonic motor stator includes a plurality of convex teeth distributed at intervals along the circumferential direction, which can enhance the vibration effect of the ultrasonic motor stator and increase the friction with the damper rotating blade.

[0013] In an optional embodiment, the ultrasonic motor stator includes an annular body, the convex teeth are arranged on the annular body, and the damper fixing plate is arranged on the inner side of the annular body.

[0014] Beneficial effects: The ultrasonic motor stator includes an annular body, the inner side of the annular body is hollow, the damper fixing plate is arranged on the inner side of the annular body, the damper fixing plate will not move with the ultrasonic motor stator, the space inside the annular body can be used to fix the damper fixing plate, and the structure is compact.

[0015] In an optional embodiment, the damper adjustment device further includes an ejector, and the ultrasonic motor stator is fixedly connected to the ejector.

[0016] Beneficial effect: Since the ultrasonic motor stator is fixedly connected to the ejector, the inside of the ultrasonic motor stator can be connected to the ejector, and after the ultrasonic motor stator is fixedly connected to the ejector, the piezoelectric ceramic is clamped between the ultrasonic motor stator and the ejector, and there is no need to use additional connecting parts to fix the piezoelectric ceramic.

[0017] In an optional embodiment, the ejector is provided with a first fixing hole, the ultrasonic motor stator is provided with a second fixing hole, the damper fixing plate is provided with a third fixing hole, and the bolt passes through the third fixing hole and the second fixing hole and is fixed to the first fixing hole.

[0018] Beneficial effect: By setting a first fixing hole on the ejector, a second fixing hole on the ultrasonic motor stator, and a third fixing hole on the damper fixing plate, the damper fixing plate and the ultrasonic motor stator can be fixed to the ejector at the same time by one bolt.

[0019] In an optional embodiment, the damper adjustment device further includes a nozzle, which passes through the damper rotating plate, the damper fixing plate, the ultrasonic motor and is connected to the ejector.

[0020] Beneficial effects: The nozzle passes through the damper rotating piece, damper fixing piece, ultrasonic motor and is connected with the ejector. The gas enters the ejector through the nozzle and is mixed with the air entering the ejector through the damper rotating piece and damper fixing piece before combustion. The nozzle can also play a role in positioning the damper rotating piece, damper fixing piece and ultrasonic motor.

[0021] In an optional embodiment, the damper adjustment device further comprises an elastic member, one end of which abuts against the damper rotating blade, and the other end of which is fixed outside the nozzle.

[0022] Beneficial effects: One end of the elastic member is against the damper rotating piece, and the other end is fixed outside the nozzle. The elastic member provides a certain pressure on the damper rotating piece. When a sinusoidal excitation signal with a phase difference of 90° for a certain period is applied to the piezoelectric ceramic, the particles on the surface of the stator of the ultrasonic motor will move along an elliptical trajectory, and finally drive the damper rotating piece to rotate through friction with the damper rotating piece. The setting of the elastic member can facilitate the rotation of the damper rotating piece, and enable the damper rotating piece to remain in the rotated position after rotation.

[0023] In an optional implementation, the damper adjustment device further includes a controller, and the controller is electrically connected to the piezoelectric ceramic.

[0024] Beneficial effects: The controller is electrically connected to the piezoelectric ceramic, and a sinusoidal excitation signal with a predetermined periodic phase difference of 70°-110° can be applied to the piezoelectric ceramic by the controller to rotate the damper rotating piece by a preset angle. Specifically, the controller applies a sinusoidal voltage to the piezoelectric ceramic, and the sinusoidal voltage will produce periodic stress changes inside the piezoelectric ceramic, causing the surface of the ultrasonic motor stator to vibrate. The vibration of the ultrasonic motor stator surface can be decomposed into two vibration components in perpendicular directions: longitudinal vibration and transverse vibration. When these two vibration components exist at the same time and the phase difference is 90°, the particles on the surface of the ultrasonic motor stator will move along an elliptical trajectory, and finally drive the damper rotating piece to rotate through friction with the damper rotating piece.

[0025] In an optional embodiment, the damper adjustment device further includes a detection component, which is capable of detecting parameters representing the combustion state, and the controller is communicatively connected to the detection component.

[0026] Beneficial effects: The detection component can detect parameters characterizing the combustion state. The controller is connected to the detection component for communication. The controller can control whether to apply a sinusoidal excitation signal with a predetermined period phase difference of 70°-110° to the piezoelectric ceramic according to the parameters detected by the detection component, thereby realizing automatic adjustment of the damper to achieve an ideal combustion state.

[0027] In a second aspect, the present invention further provides a gas stove, comprising the damper regulating device.

[0028] Beneficial effects: When a sinusoidal excitation signal with a phase difference of 70°-110° for a certain period is applied to the piezoelectric ceramics, the center of gravity of the positive and negative charges inside the piezoelectric ceramic crystal will be displaced, causing the crystal to deform. This deformation is called the inverse piezoelectric effect. The crystal deformation will cause the surface of the ultrasonic motor stator to vibrate, thereby driving the damper rotating piece to rotate through friction, and then adjusting the size of the overlap between the second air inlet hole on the damper rotating piece and the first air inlet hole on the damper fixed piece, so as to adjust the air coefficient once, and the air is mixed with the gas after passing through the second air inlet hole and the first air inlet hole. The gas stove drives the damper rotating piece to rotate through an ultrasonic motor, without the need for an additional transmission structure, and has a simple structure and a small number of parts. After a sinusoidal excitation signal with a phase difference of 70°-110° for a certain period is applied to the piezoelectric ceramics, the angle of rotation of the damper rotating piece can be very small, so that the damper can be adjusted more accurately.

[0029] In a third aspect, the present invention further provides a damper adjustment control method, which is applied to the damper adjustment device or the gas stove, and the control method comprises:

[0030] Get the combustion status;

[0031] Determine whether the combustion state is a preset state;

[0032] If not, a sinusoidal excitation signal with a predetermined periodic phase difference of 70°-110° is applied to the piezoelectric ceramic to rotate the damper rotating piece by a preset angle.

[0033] Beneficial effect: If the combustion state is the preset state, it means that the combustion state is the optimal combustion state and there is no need to adjust the damper. If the combustion state is not the preset state, a sinusoidal excitation signal with a predetermined period phase difference of 70°-110° is applied to the piezoelectric ceramic, and the center of gravity of the positive and negative charges inside the piezoelectric ceramic crystal will shift, causing the crystal to deform. This deformation is called the inverse piezoelectric effect. The crystal deformation will cause the surface of the ultrasonic motor stator to vibrate, thereby driving the damper rotating piece to rotate through friction, and then adjusting the size of the overlap between the second air inlet hole on the damper rotating piece and the first air inlet hole on the damper fixed piece, thereby automatically adjusting the primary air coefficient.

[0034] In an optional implementation, applying a sinusoidal excitation signal with a predetermined periodic phase difference of 70°-110° to the piezoelectric ceramic comprises:

[0035] A sinusoidal excitation signal with a predetermined period phase difference of 90° is applied to the piezoelectric ceramic.

[0036] In an optional embodiment, the obtaining of the combustion state includes obtaining CO and CO 2 concentration, the determination of whether the combustion state is a preset state includes determining whether the combustion state is a preset state according to the concentration of CO and CO 2The concentration determines whether the combustion state is a combustion state.

[0037] In a fourth aspect, the present invention further provides a damper adjustment control device, which is applied to the damper adjustment device or the gas stove, and the control device comprises:

[0038] An acquisition module, used to obtain the combustion status;

[0039] A judgment module, used to judge whether the combustion state is a preset state;

[0040] The control module is used for applying a sinusoidal excitation signal with a predetermined period phase difference of 70°-110° to the piezoelectric ceramic to rotate the damper rotating piece by a preset angle when the combustion state is not the preset state.

[0041] Beneficial effect: If the combustion state is the preset state, it means that the combustion state is the optimal combustion state and there is no need to adjust the damper. If the combustion state is not the preset state, a sinusoidal excitation signal with a predetermined period phase difference of 70°-110° is applied to the piezoelectric ceramic, and the center of gravity of the positive and negative charges inside the piezoelectric ceramic crystal will shift, causing the crystal to deform. This deformation is called the inverse piezoelectric effect. The crystal deformation will cause the surface of the ultrasonic motor stator to vibrate, thereby driving the damper rotating piece to rotate through friction, and then adjusting the size of the overlap between the second air inlet hole on the damper rotating piece and the first air inlet hole on the damper fixed piece, thereby automatically adjusting the primary air coefficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0043] Figure 1 is a schematic diagram of a damper adjustment device according to an embodiment of the present invention;

[0044] Figure 2 for Figure 1 An exploded view of the damper adjustment device shown;

[0045] Figure 3 for Figure 2 The enlarged view of point A in the middle;

[0046] Figure 4 is a schematic diagram when the second air inlet is completely aligned with the first air inlet;

[0047] Figure 5 is a schematic diagram of a case where half of the second air inlet is aligned with the first air inlet;

[0048] Figure 6 is a schematic diagram when the first air inlet hole is completely blocked by the air door rotating piece;

[0049] Figure 7 This is a simulation diagram of the stator of an ultrasonic motor;

[0050] Figure 8 The present invention is a flowchart of a damper adjustment control method according to an embodiment of the present invention.

[0051] Description of reference numerals:

[0052] 1. Air door fixing plate; 101. First air inlet hole; 102. Third fixing hole; 2. Air door rotating plate; 201. Second air inlet hole; 3. Ultrasonic motor; 301. Piezoelectric ceramic; 302. Ultrasonic motor stator; 3021. Protruding teeth; 3022. Annular body; 3023. Second fixing hole; 3024. Mounting part; 4. Ejector; 401. First fixing hole; 5. Bolt; 6. Nozzle; 7. Elastic member; 8. Nut; 9. Controller. DETAILED DESCRIPTION

[0053] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0054] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0055] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0056] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0057] Gas stoves are one of the indispensable cooking appliances in modern kitchens. In order to ensure combustion efficiency and flame quality, gas stoves are usually equipped with dampers to adjust the air flow into the burner.

[0058] The damper adjustment of traditional gas stoves mostly relies on manual operation by users, which has many defects. On the one hand, manual adjustment of the damper requires users to operate frequently, especially when the firepower needs to be constantly adjusted during the cooking process, the operation is cumbersome and inconvenient; on the other hand, users cannot automatically adjust the damper opening according to the actual working status of the gas stove and environmental changes, and often rely on the user's operating experience and feeling, which is prone to inaccurate adjustment, resulting in incomplete combustion, increased harmful gas emissions, and affecting cooking effects and energy utilization.

[0059] A control device for adjusting the air door opening of a gas stove is disclosed in the related art, comprising: an air door opening level adjustment unit, which is used to adjust the air door opening level and send a control signal based on the air door opening level; an air door opening level display unit, which is connected to the air door opening level adjustment unit, and the air door opening level display unit is used to display a number corresponding to the air door opening level according to the control signal; the air door opening adjustment unit includes a through-hole structure that can adjust the air door opening size; a driving motor, which is connected to the air door opening level adjustment unit and the air door opening adjustment unit, and the driving motor is used to adjust the air door opening size of the air door opening adjustment unit according to the control signal. The driving motor is connected to a driving gear, and a first air door adjustment plate has an air door adjustment gear arranged along an edge, and the air door adjustment gear is meshed with the driving gear.

[0060] The above-mentioned related technologies can realize automatic adjustment of the damper, but the damper needs to be adjusted by a driving motor and a driving gear, and the number of parts is large and the structure is complex.

[0061] Combine the following Figures 1 to 8 , describing an embodiment of the present invention.

[0062] According to an embodiment of the present invention, in a first aspect, a damper adjustment device is provided, comprising a damper fixing piece 1 , a damper rotating piece 2 and an ultrasonic motor 3 .

[0063] Among them, the damper fixing plate 1 has a first air inlet hole 101; the damper rotating plate 2 has a second air inlet hole 201; the ultrasonic motor 3 includes a piezoelectric ceramic 301 and an ultrasonic motor stator 302, the piezoelectric ceramic 301 is in contact with the ultrasonic motor stator 302, the ultrasonic motor stator 302 is in contact with the damper rotating plate 2, and the damper rotating plate 2 can rotate relative to the damper fixing plate 1 under the drive of the ultrasonic motor stator 302.

[0064] In this embodiment, when a sinusoidal excitation signal with a phase difference of 70°-110° is applied to the piezoelectric ceramic 301 for a certain period, the center of gravity of the positive and negative charges inside the crystal of the piezoelectric ceramic 301 will be displaced, causing the crystal to deform, and this deformation is called the inverse piezoelectric effect. The crystal deformation will cause the surface of the ultrasonic motor stator 302 to vibrate, thereby driving the damper rotating piece 2 to rotate through friction, and then adjusting the size of the overlap between the second air inlet hole 201 on the damper rotating piece 2 and the first air inlet hole 101 on the damper fixed piece 1, so as to adjust the primary air coefficient, and the air will mix with the gas after passing through the second air inlet hole 201 and the first air inlet hole 101.

[0065] The damper adjustment device drives the damper rotating piece 2 to rotate by the ultrasonic motor 3, without the need for an additional transmission structure, and has a simple structure and a small number of parts. After a sinusoidal excitation signal with a phase difference of 70°-110° is applied to the piezoelectric ceramic for a certain period, the damper rotating piece can rotate at a very small angle, thereby enabling more accurate damper adjustment.

[0066] Specifically, a sinusoidal excitation signal with a phase difference of 90° for a certain period can be applied to the piezoelectric ceramic 301, a sinusoidal excitation signal with a phase difference of 70° for a certain period can be applied to the piezoelectric ceramic 301, or a sinusoidal excitation signal with a phase difference of 110° for a certain period can be applied to the piezoelectric ceramic 301, all of which can achieve vibration on the surface of the ultrasonic motor stator 302. In this embodiment, it is preferred that a sinusoidal excitation signal with a phase difference of 90° for a certain period be applied to the piezoelectric ceramic 301.

[0067] Specifically, when a sinusoidal voltage with a phase difference of 90° is applied, the sinusoidal voltage will generate periodic stress changes inside the piezoelectric ceramic 301, causing vibration on the surface of the ultrasonic motor stator 302. The vibration on the surface of the ultrasonic motor stator 302 can be decomposed into two vibration components in perpendicular directions:

[0068] Longitudinal vibration: vibration along the normal direction of the surface of the ultrasonic motor stator 302;

[0069] Transverse vibration: vibration along the tangential direction of the surface of the ultrasonic motor stator 302.

[0070] When these two vibration components exist simultaneously and the phase difference is 90°, the particles on the surface of the ultrasonic motor stator 302 will move along an elliptical trajectory, and eventually drive the damper rotating blade 2 to rotate through friction with the damper rotating blade 2 .

[0071] Specific combination Figure 7 , Figure 7 The transparent part in the middle represents the shape of the ultrasonic motor stator 302 when no sinusoidal excitation signal with a sinusoidal phase difference of 90° is applied to the piezoelectric ceramic 301, and the colored part represents the shape of the ultrasonic motor stator 302 when a sinusoidal excitation signal with a sinusoidal phase difference of 90° is applied to the piezoelectric ceramic 301. Figure 7 It can be seen that when a sinusoidal excitation signal with a sinusoidal phase difference of 90° is applied to the piezoelectric ceramic 301 , the shape of the ultrasonic motor stator 302 changes, so that the damper rotating blade 2 can be driven to rotate through friction with the damper rotating blade 2 .

[0072] Specifically in one embodiment, the piezoelectric ceramic 301 is an annular sheet structure.

[0073] Specifically, refer to Figure 3 The piezoelectric ceramic 301 includes a plurality of arc-shaped sheets spaced apart from each other along the circumferential direction.

[0074] In one embodiment, the ultrasonic motor stator 302 includes a plurality of protruding teeth 3021 distributed at intervals along the circumferential direction, and the protruding teeth 3021 are in contact with the damper rotating blade 2 .

[0075] In this embodiment, the ultrasonic motor stator 302 includes a plurality of convex teeth 3021 distributed at intervals along the circumferential direction, which can enhance the vibration effect of the ultrasonic motor stator 302 and increase the friction force with the damper rotating blade 2 .

[0076] In one embodiment, the ultrasonic motor stator 302 includes an annular body 3022 , the protruding teeth 3021 are disposed on the annular body 3022 , and the damper fixing piece 1 is disposed on the inner side of the annular body 3022 .

[0077] In this embodiment, the ultrasonic motor stator 302 includes an annular body 3022, the inner side of the annular body 3022 is hollow, and the damper fixing plate 1 is arranged on the inner side of the annular body 3022. The damper fixing plate 1 will not move with the ultrasonic motor stator 302, and the space inside the annular body 3022 can be used to fix the damper fixing plate 1, and the structure is compact.

[0078] When the air passes through the second air inlet hole 201 and the first air inlet hole 101 , it enters the ultrasonic motor 3 and then mixes with the air in the ejector 4 .

[0079] In one embodiment, the damper adjustment device further includes an ejector 4 , and the ultrasonic motor stator 302 is fixedly connected to the ejector 4 .

[0080] In this embodiment, since the ultrasonic motor stator 302 is fixedly connected to the ejector 4, the interior of the ultrasonic motor stator 302 can be connected to the ejector 4, and after the ultrasonic motor stator 302 is fixedly connected to the ejector 4, the piezoelectric ceramic 301 is clamped between the ultrasonic motor stator 302 and the ejector 4, and there is no need to use additional connecting parts to fix the piezoelectric ceramic 301.

[0081] In one embodiment, the ejector 4 is provided with a first fixing hole 401 , the ultrasonic motor stator 302 is provided with a second fixing hole 3023 , the damper fixing plate 1 is provided with a third fixing hole 102 , and the bolt 5 passes through the third fixing hole 102 and the second fixing hole 3023 and is fixed to the first fixing hole 401 .

[0082] In this embodiment, by setting a first fixing hole 401 on the ejector 4, setting a second fixing hole 3023 on the ultrasonic motor stator 302, and setting a third fixing hole 102 on the damper fixing plate 1, the damper fixing plate 1 and the ultrasonic motor stator 302 can be fixed to the ejector 4 at the same time by a bolt 5.

[0083] Specifically in one embodiment, Figure 3 As shown, a mounting portion 3024 is formed on the inner side of the annular body 3022 , and a second fixing hole 3023 is provided on the mounting portion 3024 . The area of ​​the mounting portion 3024 is smaller than the area of ​​the inner side of the annular body 3022 , and does not affect the flow of air.

[0084] In one embodiment, the damper adjustment device further includes a nozzle 6 , which passes through the damper rotating plate 2 , the damper fixing plate 1 , the ultrasonic motor 3 , and is connected to the ejector 4 .

[0085] In this embodiment, the nozzle 6 passes through the damper rotating piece 2, the damper fixing piece 1, the ultrasonic motor 3 and is connected to the ejector 4. The gas enters the ejector 4 through the nozzle 6 and is mixed with the air entering the ejector 4 through the damper rotating piece 2 and the damper fixing piece 1 and then burns. The nozzle 6 can also play a role in positioning the damper rotating piece 2, the damper fixing piece 1 and the ultrasonic motor 3.

[0086] In one embodiment, the damper adjustment device further includes an elastic member 7 , one end of the elastic member 7 abuts against the damper rotating blade 2 , and the other end of the elastic member 7 is fixed outside the nozzle 6 .

[0087] In this embodiment, one end of the elastic member 7 is against the damper rotating piece 2, and the other end is fixed outside the nozzle 6. The elastic member 7 provides a certain pressure on the damper rotating piece 2. When a sinusoidal excitation signal with a phase difference of 90° for a certain period is applied to the piezoelectric ceramic 301, the particles on the surface of the ultrasonic motor stator 302 will move along an elliptical trajectory, and finally drive the damper rotating piece 2 to rotate through friction with the damper rotating piece 2. The setting of the elastic member 7 can facilitate the rotation of the damper rotating piece 2, and enable the damper rotating piece 2 to remain in the rotated position after rotation.

[0088] Specifically in one embodiment, the elastic member 7 is a spring.

[0089] Specifically in one embodiment, a nut 8 is disposed outside the nozzle 6 , one end of the elastic member 7 abuts against the damper rotating piece 2 , and the other end abuts against the nut 8 .

[0090] In one embodiment, the damper adjustment device further includes a controller 9 , and the controller 9 is electrically connected to the piezoelectric ceramic 301 .

[0091] In this embodiment, the controller 9 is electrically connected to the piezoelectric ceramic 301, and a sinusoidal excitation signal with a predetermined periodic phase difference of 70°-110° can be applied to the piezoelectric ceramic 301 by the controller 9 to rotate the damper rotating piece 2 by a preset angle. Specifically, the controller 9 applies a sinusoidal voltage to the piezoelectric ceramic 301, and the sinusoidal voltage will produce periodic stress changes inside the piezoelectric ceramic 301, causing vibrations on the surface of the ultrasonic motor stator 302. The vibrations on the surface of the ultrasonic motor stator 302 can be decomposed into two vibration components in perpendicular directions: longitudinal vibration and transverse vibration. When these two vibration components exist at the same time and the phase difference is 90°, the particles on the surface of the ultrasonic motor stator 302 will move along an elliptical trajectory, and finally drive the damper rotating piece 2 to rotate through friction with the damper rotating piece 2.

[0092] In one embodiment, the damper adjustment device further includes a detection component, which can detect parameters representing the combustion state, and the controller 9 is in communication connection with the detection component.

[0093] In this embodiment, the detection component can detect parameters characterizing the combustion state, and the controller 9 is connected in communication with the detection component. The controller 9 can control whether to apply a sinusoidal excitation signal with a predetermined period phase difference of 70°-110° to the piezoelectric ceramic 301 according to the parameters detected by the detection component, thereby realizing automatic adjustment of the damper to achieve an ideal combustion state.

[0094] In one embodiment, the detection components are CO and CO 2 Concentration sensor, by detecting CO and CO 2 The concentration is used to determine whether the combustion state is ideal.

[0095] Specifically in one embodiment, after a sinusoidal excitation signal with a predetermined period phase difference of 70°-110° is applied to the piezoelectric ceramic 301, the damper rotating piece 2 rotates a predetermined angle, and the combustion state can be continuously monitored and compared with the preset state, and the damper opening can be adjusted in time according to the deviation until the optimal combustion state is reached, ensuring that the combustion process is both efficient and safe. The damper adjustment device not only improves the convenience and intelligence level of the gas stove, but also significantly improves the accuracy of fire control. Users do not need to manually adjust the damper frequently, and the system will automatically adjust according to actual needs, which greatly simplifies the operation process. Through precise damper adjustment, the problem of insufficient combustion or overheating can be effectively avoided, the combustion efficiency can be improved, and energy waste can be reduced. At the same time, it can also improve the cooking effect and make the food more delicious.

[0096] Specifically in one embodiment, the monitoring component may also include a temperature sensor, an oxygen concentration sensor, and the like.

[0097] In one embodiment, the first air inlet hole 101 is arc-shaped, and the second air inlet hole 201 is consistent in size and shape with the first air inlet hole 101 .

[0098] In this embodiment, the second air inlet hole 201 is consistent with the first air inlet hole 101 in size and shape, and the area of ​​the second air inlet hole 201 aligned with the first air inlet hole 101 can be adjusted by rotating the damper rotating piece 2 to thereby adjust the opening of the damper.

[0099] Specifically in one embodiment, Figure 2 and Figure 3 As shown, each damper fixing piece 1 is provided with two first air inlet holes 101 , and correspondingly, each damper rotating piece 2 is provided with two second air inlet holes 201 .

[0100] Specifically in one embodiment, Figure 1 and Figure 2 As shown, the ejector 4 is symmetrically connected to two damper fixing plates 1 , and correspondingly, two damper rotating plates 2 are provided, and each damper rotating plate 2 is in contact with a stator 302 of the ultrasonic motor.

[0101] Specific as Figure 4 As shown, it is a schematic diagram when the second air inlet 201 is completely aligned with the first air inlet 101; Figure 5 As shown, it is a schematic diagram of half of the second air inlet hole 201 being aligned with the first air inlet hole 101; Figure 6 , which is a schematic diagram when the first air inlet 101 is completely blocked by the air door rotating piece 2.

[0102] According to an embodiment of the present invention, in a second aspect, a gas stove is provided, comprising the damper adjustment device provided in the above embodiment.

[0103] When a sinusoidal excitation signal with a phase difference of 70°-110° for a certain period is applied to the piezoelectric ceramic 301, the center of gravity of the positive and negative charges inside the crystal of the piezoelectric ceramic 301 will be displaced, causing the crystal to deform, which is called the inverse piezoelectric effect. The crystal deformation will cause the surface of the ultrasonic motor stator 302 to vibrate, thereby driving the damper rotating piece 2 to rotate through friction, and then adjusting the size of the overlap between the second air inlet hole 201 on the damper rotating piece 2 and the first air inlet hole 101 on the damper fixed piece 1, so as to adjust the air coefficient once, and the air will mix with the gas after passing through the second air inlet hole 201 and the first air inlet hole 101. The gas stove drives the damper rotating piece 2 to rotate through the ultrasonic motor 3, without the need for an additional transmission structure, and has a simple structure and a small number of parts. After a sinusoidal excitation signal with a phase difference of 70°-110° for a certain period is applied to the piezoelectric ceramic, the angle of rotation of the damper rotating piece can be very small, so that the damper can be adjusted more accurately.

[0104] After the gas stove applies a sinusoidal excitation signal with a predetermined period phase difference of 70°-110° to the piezoelectric ceramic 301, the damper rotating piece 2 rotates a predetermined angle. By continuously monitoring the combustion state and comparing it with the preset state, the damper opening can be adjusted in time according to the deviation until the optimal combustion state is reached, ensuring that the combustion process is both efficient and safe. This gas stove not only improves the convenience and intelligence level of the gas stove, but also significantly improves the accuracy of fire control. Users do not need to manually adjust the damper frequently, and the system will automatically adjust according to actual needs, greatly simplifying the operation process. Through precise damper adjustment, problems such as insufficient combustion or overheating can be effectively avoided, combustion efficiency can be improved, and energy waste can be reduced. At the same time, it can also improve cooking effects and make food more delicious.

[0105] According to an embodiment of the present invention, in a third aspect, a damper adjustment control method is provided, which is applied to the damper adjustment device mentioned above, and the control method includes:

[0106] Get the combustion status;

[0107] Determine whether the combustion state is a preset state;

[0108] If not, a sinusoidal excitation signal with a predetermined period phase difference of 70°-110° is applied to the piezoelectric ceramic 301 to rotate the damper rotating piece 2 by a preset angle.

[0109] In this embodiment, if the combustion state is the preset state, it means that the combustion state is the optimal combustion state, and there is no need to adjust the damper. If the combustion state is not the preset state, a sinusoidal excitation signal with a predetermined period phase difference of 70°-110° is applied to the piezoelectric ceramic 301, and the center of gravity of the positive and negative charges inside the crystal of the piezoelectric ceramic 301 will be displaced, causing the crystal to deform. This deformation is called the inverse piezoelectric effect. The crystal deformation will cause the surface of the ultrasonic motor stator 302 to vibrate, thereby driving the damper rotating piece 2 to rotate through friction, and then adjusting the size of the overlap between the second air inlet hole 201 on the damper rotating piece 2 and the first air inlet hole 101 on the damper fixed piece 1, so as to achieve automatic adjustment of the primary air coefficient.

[0110] In one embodiment, Figure 8 As shown, if the combustion state is the preset state, it is still necessary to intermittently or uninterruptedly detect the combustion state and determine whether the combustion state is ideal to ensure that the combustion state can maintain the optimal combustion state.

[0111] Specifically in one embodiment, if the combustion state is a preset state, the combustion state may be detected at intervals of 60 seconds to determine whether the combustion state is ideal.

[0112] In one embodiment, after applying a sinusoidal excitation signal with a predetermined periodic phase difference of 70°-110° to the piezoelectric ceramic 301 to rotate the damper rotating blade 2 by a preset angle, it is still necessary to detect the combustion state and determine whether the combustion state is ideal to ensure that the combustion state reaches the optimal combustion state.

[0113] In one embodiment, applying a sinusoidal excitation signal with a predetermined period phase difference of 70°-110° to the piezoelectric ceramic 301 includes:

[0114] A sinusoidal excitation signal with a predetermined period and a phase difference of 90° is applied to the piezoelectric ceramic 301 .

[0115] In other alternative embodiments, a sinusoidal excitation signal with a phase difference of 70° for a certain period may be applied to the piezoelectric ceramic 301, or a sinusoidal excitation signal with a phase difference of 110° for a certain period may be applied to the piezoelectric ceramic 301, both of which can achieve vibration on the surface of the ultrasonic motor stator 302.

[0116] In one embodiment, obtaining the combustion state includes obtaining CO and CO 2 concentration, judging whether the combustion state is the preset state, including the CO and CO 2 The concentration determines whether the combustion state is a combustion state.

[0117] In this embodiment, according to CO and CO 2 The concentration determines whether the combustion state is a combustion state.

[0118] Specifically in one embodiment, applying a sinusoidal excitation signal with a predetermined period phase difference of 90° to the piezoelectric ceramic 301 can cause the damper rotating piece 2 to rotate 5°. The damper rotating piece 2 rotates at a smaller angle each time, which can improve the accuracy of adjusting the damper.

[0119] According to an embodiment of the present invention, in a fourth aspect, a damper adjustment control device is provided, which is applied to the damper adjustment device or the gas stove provided in the above embodiment, and the control device includes:

[0120] An acquisition module, used to obtain the combustion status;

[0121] A judgment module, used to judge whether the combustion state is a preset state;

[0122] The control module is used to apply a sinusoidal excitation signal with a predetermined period phase difference of 70°-110° to the piezoelectric ceramic 301 to rotate the damper rotating piece 2 by a preset angle when the combustion state is not the preset state.

[0123] In this embodiment, if the combustion state is the preset state, it means that the combustion state is the optimal combustion state, and there is no need to adjust the damper. If the combustion state is not the preset state, a sinusoidal excitation signal with a predetermined period phase difference of 70°-110° is applied to the piezoelectric ceramic 301, and the center of gravity of the positive and negative charges inside the crystal of the piezoelectric ceramic 301 will be displaced, causing the crystal to deform. This deformation is called the inverse piezoelectric effect. The crystal deformation will cause the surface of the ultrasonic motor stator 302 to vibrate, thereby driving the damper rotating piece 2 to rotate through friction, and then adjusting the size of the overlap between the second air inlet hole 201 on the damper rotating piece 2 and the first air inlet hole 101 on the damper fixed piece 1, so as to achieve automatic adjustment of the primary air coefficient.

[0124] The further functional description of each of the above modules is the same as that of the above corresponding embodiments and will not be repeated here.

[0125] The control device in this embodiment is presented in the form of a functional unit, where the unit refers to an ASIC (Application Specific Integrated Circuit) circuit, a processor and memory that executes one or more software or fixed programs, and / or other devices that can provide the above functions.

[0126] Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the present application.

Claims

1. A damper adjustment device, characterized in that: include: The air door fixing plate (1) has a first air inlet hole (101); The air door rotating piece (2) has a second air inlet hole (201); An ultrasonic motor (3) comprises a piezoelectric ceramic (301) and an ultrasonic motor stator (302), wherein the piezoelectric ceramic (301) is in contact with the ultrasonic motor stator (302), and the ultrasonic motor stator (302) is in contact with the damper rotating piece (2), and the damper rotating piece (2) can rotate relative to the damper fixing piece (1) under the drive of the ultrasonic motor stator (302).

2. The damper adjustment device according to claim 1, characterized in that: The ultrasonic motor stator (302) comprises a plurality of convex teeth (3021) distributed at intervals along the circumferential direction, and the convex teeth (3021) are in contact with the damper rotating blade (2).

3. The damper adjustment device according to claim 2, characterized in that: The ultrasonic motor stator (302) comprises an annular body (3022), the convex teeth (3021) are arranged on the annular body (3022), and the damper fixing plate (1) is arranged on the inner side of the annular body (3022).

4. The damper adjustment device according to claim 1, characterized in that: The damper adjustment device also includes an ejector (4), and the ultrasonic motor stator (302) is fixedly connected to the ejector (4).

5. The damper adjustment device according to claim 4, characterized in that: The ejector (4) is provided with a first fixing hole (401), the ultrasonic motor stator (302) is provided with a second fixing hole (3023), the damper fixing plate (1) is provided with a third fixing hole (102), and the bolt (5) passes through the third fixing hole (102) and the second fixing hole (3023) and is fixed to the first fixing hole (401).

6. The damper adjustment device according to claim 4, characterized in that: The damper adjustment device further comprises a nozzle (6), wherein the nozzle (6) passes through the damper rotating plate (2), the damper fixing plate (1), the ultrasonic motor (3), and is connected to the ejector (4).

7. The damper adjustment device according to claim 6, characterized in that: The damper adjustment device also includes an elastic member (7), one end of the elastic member (7) abuts against the damper rotating plate (2), and the other end is fixed outside the nozzle (6).

8. The damper adjustment device according to any one of claims 1 to 7, characterized in that: The damper adjustment device further comprises a controller (9), and the controller (9) is electrically connected to the piezoelectric ceramic (301).

9. The damper adjustment device according to claim 8, characterized in that: The damper adjustment device further comprises a detection component, which is capable of detecting parameters representing the combustion state, and the controller (9) is in communication connection with the detection component.

10. A gas stove, characterized in that: The invention comprises the damper adjustment device according to any one of claims 1 to 9.

11. A damper adjustment control method, characterized in that: Applicable to the damper adjustment device according to any one of claims 1 to 9 or the gas stove according to claim 10, the control method comprises: Get the combustion status; Determine whether the combustion state is a preset state; If not, a sinusoidal excitation signal with a predetermined period phase difference of 70°-110° is applied to the piezoelectric ceramic (301) to rotate the damper rotating piece (2) by a preset angle.

12. The damper adjustment control method according to claim 11, characterized in that: The step of applying a sinusoidal excitation signal having a predetermined period phase difference of 70°-110° to the piezoelectric ceramic (301) comprises: A sinusoidal excitation signal with a predetermined period phase difference of 90° is applied to the piezoelectric ceramic (301).

13. The damper adjustment control method according to claim 11, characterized in that: The acquiring of the combustion state includes acquiring the concentrations of CO and CO2, and the determining whether the combustion state is a preset state includes determining whether the combustion state is a combustion state according to the concentrations of CO and CO2.

14. A damper adjustment control device, characterized in that: Applicable to the damper adjustment device according to any one of claims 1 to 9 or the gas stove according to claim 10, the control device comprises: An acquisition module, used to obtain the combustion status; A judgment module, used to judge whether the combustion state is a preset state; The control module is used for applying a sinusoidal excitation signal with a predetermined period phase difference of 70°-110° to the piezoelectric ceramic (301) to rotate the damper rotating piece (2) by a preset angle when the combustion state is not a preset state.

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