Air valve structure and farm applying same

Abstract

The utility model discloses an air valve structure and a farm applying the same, the air valve structure comprises an air duct, a cover plate assembly and a driving assembly, the cover plate assembly is arranged at an outlet of the air duct, and the driving assembly is connected with the cover plate assembly and used for driving the cover plate assembly to be opened or closed; wherein the driving assembly comprises a permanent magnet stepping motor, the permanent magnet stepping motor is connected with the cover plate assembly, the cover plate assembly can be driven to be opened or closed after the permanent magnet stepping motor is powered on, and the cover plate assembly can be kept in the current state after the permanent magnet stepping motor is powered off. According to the air valve structure provided by the utility model, the cover plate assembly does not need to be opened by wind power, the cover plate assembly does not need to be continuously supported by wind power to keep an open state in the ventilation process, and the cover plate assembly can be opened and the state can be maintained by the permanent magnet stepping motor; the technical problem that a traditional air valve needs wind power to be opened and maintain the opening state, and consequently wind power loss is caused is solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of livestock breeding, and relates to a wind valve structure and a breeding farm applying the same. Background Technique

[0002] In general, a livestock breeding farm uses a fan in combination with a self-opening and closing wind valve to achieve ventilation and prevent air from flowing back. The wind valve plays a crucial role in isolating external adverse influencing factors.

[0003] When the fan is turned on, an ordinary self-opening and closing wind valve opens the wind valve cover plate by the wind force for ventilation. When the fan is turned off, the wind valve cover plate closes by gravity to prevent air from flowing back. This kind of wind valve not only requires wind force to open the cover plate when the fan is turned on, but also needs continuous wind force to support the cover plate to remain open during the ventilation process, resulting in wind force loss, manifested as a large fan current and energy waste. When the fan is turned off, it needs to rely on the self-weight of the cover plate to close. When the cover plate is opened more than 90 degrees, it cannot close normally. Even if the cover plate closes normally, it will be affected by the air pressure in the poultry house and have small repeated openings and closings and cannot be completely sealed tightly, resulting in air leakage or air flowing back, affecting the air quality in the poultry house. Content of the Utility Model

[0004] In view of this, the utility model provides a wind valve structure and a breeding farm applying the same, which solves the technical problem that the traditional wind valve causes wind force loss due to the need for wind force to open and maintain the open state.

[0005] To solve the above problems, according to one aspect of the present application, an embodiment of the utility model provides a wind valve structure, which includes an air duct, a cover plate assembly and a driving assembly. The cover plate assembly is arranged at the outlet of the air duct, and the driving assembly is connected to the cover plate assembly for driving the cover plate assembly to open or close.

[0006] Wherein, the driving assembly includes a permanent magnet stepping motor, which is connected to the cover plate assembly. After being powered on, it can drive the cover plate assembly to open or close, and after being powered off, it can make the cover plate assembly maintain the current state.

[0007] In some embodiments, the cover plate assembly includes a first cover plate and a second cover plate, the driving assembly includes a first permanent magnet stepping motor and a second permanent magnet stepping motor. The first permanent magnet stepping motor is connected to the first cover plate, and the second permanent magnet stepping motor is connected to the second cover plate. When the first cover plate and the second cover plate are opened simultaneously, the outlet of the air duct can be opened.

[0008] In some embodiments, the wind valve structure further includes a first sealing assembly. When the cover plate assembly is closed, the first sealing assembly is arranged at the connection between the cover plate assembly and the inner wall of the air duct.

[0009] In some embodiments, the first sealing assembly includes a first silicone sealing strip disposed at the edge of the cover plate assembly and a second silicone sealing strip disposed on the inner wall of the air duct. When the cover plate assembly seals the outlet of the air duct, the first silicone sealing strip and the second silicone sealing strip can be extrusion-fitted to seal the gap between the cover plate assembly and the air duct.

[0010] In some embodiments, the air valve structure further includes a second sealing assembly disposed in the air duct, and when the cover plate assembly is closed, the second sealing assembly can seal the gap between the first cover plate and the second cover plate.

[0011] In some embodiments, the second sealing assembly includes a fixing member, an air duct silicone sealing strip, and a cover plate silicone sealing strip. The fixing member is disposed at the outlet of the air duct and extends radially from one end of the air duct to the other end. A groove is provided on the fixing member, and the air duct silicone sealing strip is located in the groove. The cover plate silicone sealing strip is disposed on the side of the cover plate assembly facing the air duct. And when the cover plate assembly is closed, the air duct silicone sealing strip and the cover plate silicone sealing strip can be extrusion-fitted to seal the gap between the first cover plate and the second cover plate.

[0012] In some embodiments, the air valve structure further includes a heat preservation assembly attached to the side of the cover plate assembly facing the air duct.

[0013] In some embodiments, the heat preservation assembly is a heat preservation layer matching the shape of the cover plate assembly; and / or the material of the heat preservation layer is one of polystyrene foam, cotton, or sponge.

[0014] In some embodiments, the air valve structure further includes a controller connected to the driving assembly. The controller is configured to control the opening or closing of the cover plate assembly according to the working state of the fan, and simultaneously control the driving assembly to be powered on or off; wherein, the fan is used to achieve ventilation through the air duct.

[0015] According to another aspect of the present application, an embodiment of the present utility model provides a farm, and the above air valve structure is provided at the ventilation opening of the farm.

[0016] Compared with the prior art, the air valve structure of the present utility model has at least the following beneficial effects:

[0017] The air valve structure provided by the present utility model includes an air duct, a cover plate assembly, and a driving assembly. The cover plate assembly is arranged at the outlet of the air duct, and the driving assembly is connected to the cover plate assembly for driving the cover plate assembly to open or close. Among them, the driving assembly includes a permanent magnet stepper motor, which is connected to the cover plate assembly. After being powered on, it can drive the cover plate assembly to open or close, and after being powered off, it can make the cover plate assembly maintain its current state.

[0018] The present utility model controls the cover plate assembly by using a permanent magnet stepper motor. When it is necessary to use the air duct for ventilation or prevent air from flowing back, the permanent magnet stepper motor is powered on and rotates forward by 90°, while driving the cover plate assembly to rotate by 90°, so that the cover plate assembly is completely opened. Then the permanent magnet stepper motor is immediately powered off, and the position of the cover plate assembly is fixed by the suction force between the permanent magnet rotor and the stator to keep it in an open state of 90°. On the contrary, when it is necessary to use the air duct to prevent air from flowing back, the permanent magnet stepper motor is powered on in the reverse direction to rotate in the reverse direction, driving the cover plate assembly to rotate in the reverse direction by 90° to close and block the air outlet of the air duct. When the cover plate assembly is completely closed, the permanent magnet stepper motor is immediately powered off, so that the cover plate assembly maintains a state of being in close contact with the air duct. That is to say, the air valve structure provided by the present utility model does not require wind force to open the cover plate assembly, nor does it need to rely on wind force to continuously support the cover plate assembly to maintain an open state during the ventilation process, solving the technical problem of wind force loss caused by the traditional air valve that requires wind force to open and maintain an open state.

[0019] The above description is only an overview of the technical solution of the present utility model. In order to be able to understand the technical means of the present utility model more clearly and implement it according to the content of the specification, the following takes the preferred embodiments of the present utility model and describes them in detail in conjunction with the accompanying drawings as follows. Description of the Drawings

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for description in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0021] Figure 1 It is a schematic structural diagram of the back of an air valve structure provided by an embodiment of the present utility model;

[0022] Figure 2 It is a partial enlarged view of the connection between the driving assembly and the cover plate assembly in an air valve structure provided by an embodiment of the present utility model;

[0023] Figure 3 It is a schematic structural diagram of another angle of the back of an air valve structure provided by an embodiment of the present utility model;

[0024] Figure 4 is a cross-sectional view of a damper structure provided by an embodiment of the present utility model;

[0025] Figure 5 is a partial enlarged view of a groove in a damper structure provided by an embodiment of the present utility model;

[0026] Figure 6 is a structural schematic diagram of a cover plate assembly in a damper structure provided by an embodiment of the present utility model;

[0027] Figure 7 is a structural schematic diagram of another angle of a damper structure provided by an embodiment of the present utility model;

[0028] Figure 8 is a structural schematic diagram of a cover plate assembly in a damper structure provided by an embodiment of the present utility model when it is in an open state;

[0029] Figure 9 is another structural schematic diagram of a cover plate assembly in a damper structure provided by an embodiment of the present utility model when it is in an open state;

[0030] Figure 10 is a structural schematic diagram of a cover plate assembly in a damper structure provided by an embodiment of the present utility model when it is in a closed state;

[0031] Figure 11 is another structural schematic diagram of a cover plate assembly in a damper structure provided by an embodiment of the present utility model when it is in a closed state.

[0032] Wherein:

[0033] 1, air duct; 2, cover plate assembly; 21, first cover plate; 22, second cover plate; 3, drive assembly; 31, first permanent magnet stepper motor; 32, second permanent magnet stepper motor; 4, first sealing assembly; 41, first silicone rubber sealing strip; 42, second silicone rubber sealing strip; 5, second sealing assembly; 51, groove; 52, air duct silicone rubber sealing strip; 53, cover plate silicone rubber sealing strip. Detailed implementation manners

[0034] To further elaborate on the technical means and effects adopted by the present utility model to achieve the intended utility model purpose, the following combines the drawings and preferred embodiments to detail the specific implementation manners, structures, features, and their effects of the application according to the present utility model. In the following description, different "one embodiment" or "embodiment" does not necessarily refer to the same embodiment. In addition, the specific features, structures, or characteristics in one or more embodiments can be combined in any suitable form.

[0035] In the description of the present utility model, it should be clear that the terms "first", "second", etc. in the description, claims and above-mentioned drawings of the present utility model are used to distinguish similar objects, and do not necessarily describe a specific order or sequence; the terms "vertical", "lateral", "longitudinal", "front", "rear", "left", "right", "upper", "lower", "horizontal", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present utility model, rather than meaning that the device or element referred to must have a specific orientation or position, so it cannot be understood as a limitation to the present utility model.

[0036] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", "connection" 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 directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0037] Embodiment 1

[0038] This embodiment provides a damper structure, as Figures 1-11 shown, the damper structure includes an air duct 1, a cover plate assembly 2 and a driving assembly 3. The cover plate assembly 2 is arranged at the outlet of the air duct 1, and the driving assembly 3 is connected to the cover plate assembly 2 for driving the cover plate assembly 2 to open or close;

[0039] Among them, the driving assembly 3 includes a permanent magnet stepper motor, which is connected to the cover plate assembly 2. After being powered on, it can drive the cover plate assembly 2 to open or close, and after being powered off, it can make the cover plate assembly 2 maintain the current state.

[0040] Specifically, the general outline of the air duct 1 is a hollow columnar structure. After being horizontally arranged, one end is open and the other end is provided with a cover plate assembly 2. The permanent magnet stepper motor is arranged outside the top of the other end of the air duct 1. The output end of the permanent magnet stepper motor is connected to the rotating shaft of the cover plate assembly 2. After the permanent magnet stepper motor rotates, it can drive the rotating shaft on the cover plate assembly 2 to rotate, so as to realize the opening and closing of the cover plate assembly 2. Furthermore, it realizes air change or prevention of air return through the air duct.

[0041] The traditional air valve structure relies on wind force to open the cover plate for ventilation when the fan is turned on, and relies on gravity to close the cover plate for preventing air return when the fan is turned off. Such an air valve not only requires wind force to open the cover plate when the fan is turned on, but also requires continuous wind force to support the cover plate to remain open during the ventilation process, resulting in wind force loss, manifested as a large fan current and causing energy waste. Moreover, when the fan is turned off, it is necessary to rely on the self-weight of the cover plate to close. When the opening angle of the cover plate exceeds 90 degrees, it cannot be normally closed. Even if the cover plate is normally closed, it will be affected by the air pressure in the poultry house and have repeated small-scale opening and closing and cannot be completely sealed tightly, resulting in air leakage or air return phenomena and affecting the air quality in the poultry house.

[0042] To address the above problems, in this embodiment, a permanent magnet stepper motor is used to control the cover plate assembly 2. When it is necessary to use the air duct 1 for ventilation, the permanent magnet stepper motor is powered on and rotates forward by 90°, while driving the cover plate assembly 2 to rotate by 90°, so that the cover plate assembly 2 is completely opened. After that, the permanent magnet stepper motor is immediately powered off, and the position of the cover plate assembly 2 is fixed by the suction force between the permanent magnet rotor and the stator to keep it in an open state of 90°. On the contrary, when it is necessary to use the air duct 1 to prevent air return, the permanent magnet stepper motor is reversely powered on to achieve reverse rotation, driving the cover plate assembly 2 to rotate reversely by 90° to close and block the air outlet of the air duct 1. When the cover plate assembly 2 is completely closed, the permanent magnet stepper motor is immediately powered off, so that the cover plate assembly 2 maintains a state of being in close contact with the air duct 1.

[0043] For the air valve structure provided in this embodiment, the permanent magnet stepper motor is powered off separately after each power-on to complete the corresponding function. The cover plate assembly 2 is locked by using the principle of the shortest magnetic path inside the permanent magnet stepper motor, or it can also be achieved by automatically short-circuiting the lead wires through signal feedback after the permanent magnet stepper motor is powered off for a period of time to improve the reliability of locking the cover plate assembly. That is to say, the air valve structure provided in this embodiment does not require wind force to open the cover plate assembly 2, nor does it require continuous wind force to support the cover plate assembly 2 to remain open during the ventilation process, solving the technical problem of wind force loss caused by the traditional air valve requiring wind force to open and maintain the open state. Moreover, regardless of whether the opening angle of the cover plate assembly 2 exceeds 90 degrees, it can be normally closed under the action of the driving component 3.

[0044] In addition, it should be noted that: for the permanent magnet stepper motor in this embodiment, its rotor is a permanent magnet, its step angle is 90°, and a pulse power supply is used to form a clockwise rotation of 90° (opening the cover plate assembly) and a counterclockwise rotation of 90° (closing the cover plate assembly).

[0045] In addition, in the above description, the reason why the permanent magnet stepper motor can lock the cover assembly 2 in the current state after power-off is that the rotor is a permanent magnet, the stepper motor adopts a salient pole rotor, and using the principle of the shortest magnetic path, the magnetic poles of the permanent magnet rotor align and attract with the stator poles. When the stator winding of the permanent magnet stepper motor is energized, an electromagnetic field is generated. After power-off, all the lead-out wires are connected into one point. The cover assembly 2 is still fixed by the attraction of the permanent magnet rotor to the stator. Once the cover assembly 2 is rotated by an external force, a motor short-circuit power generation state will be formed, which will generate a large resistance to prevent the cover assembly 2 from rotating, forming a "locking" effect.

[0046] In a specific embodiment, as Figure 6 shown, the cover assembly 2 includes a first cover 21 and a second cover 22, the drive assembly 3 includes a first permanent magnet stepper motor 31 and a second permanent magnet stepper motor 32, the first permanent magnet stepper motor 31 is connected to the first cover 21, and the second permanent magnet stepper motor 32 is connected to the second cover 22; when the first cover 21 and the second cover 22 are opened simultaneously, they can open the outlet of the air duct 1.

[0047] Specifically, the general outline of the air duct 1 is cylindrical, its inlet is circular, the first cover 21 and the second cover 22 are respectively semi-circular structures, the first cover 21 and the second cover 22 can be combined into a circle, and this circle matches the outlet of the air duct 1. Moreover, the rotation axes of the first cover 21 and the second cover 22 are both located near the center of the outlet of the air duct 1.

[0048] In this way, with the above structure, after the first permanent magnet stepper motor 31 is energized, it drives the first cover 21 to rotate 90°. After power-off, it can keep the first cover 21 in the current state; after the second permanent magnet stepper motor 32 is energized, it can drive the second cover 22 to rotate 90°. After power-off, it can keep the second cover 22 in the current state; at this time, the first cover 21 and the second cover 22 are located outside the air duct 1, and the two are fitted together and parallel to the axis of the air duct 1, and the outlet of the air duct 1 is opened.

[0049] After that, after the first permanent magnet stepper motor 31 is reversely energized, it drives the first cover 21 to rotate reversely 90°. After power-off, it can keep the first cover 21 in the current state; after the second permanent magnet stepper motor 32 is reversely energized, it can drive the second cover 22 to rotate reversely 90°. After power-off, it can keep the second cover 22 in the current state; at this time, the first cover 21 and the second cover 22 are combined into a circle, and this circle covers the outlet of the air duct 1, realizing the blocking of the air duct 1.

[0050] In a specific embodiment, as Figure 8As shown, the air valve structure further includes a first sealing assembly 4. When the cover plate assembly 2 is closed, the first sealing assembly 4 is disposed at the connection between the cover plate assembly 2 and the inner wall of the air duct 1. The first sealing assembly 4 is arranged around the edge of the cover plate assembly 2. In this way, when the cover plate assembly 2 is closed, the first sealing assembly 4 is squeezed, so that the cover plate assembly 2 and the air duct 1 are closely fitted, ensuring no air leakage, no air return, and not affecting the normal opening and closing of the cover plate assembly.

[0051] In a specific embodiment, as Figure 8 and Figure 11 shown, the first sealing assembly 4 includes a first silicone sealing strip 41 disposed at the edge of the cover plate assembly 2 and a second silicone sealing strip 42 disposed on the inner wall of the air duct. When the cover plate assembly 2 blocks the outlet of the air duct 1, the first silicone sealing strip 41 and the second silicone sealing strip 42 can be squeezed and matched to seal the gap between the cover plate assembly and the air duct.

[0052] Specifically, when the cover plate assembly 2 includes a first cover plate 21 and a second cover plate 22, the first cover plate 21 and the second cover plate 22 are semi-circular. Then, the first silicone sealing strip 41 is pasted on the arc edges of the first cover plate 21 and the second cover plate 22, and the shape of the first silicone sealing strip 41 matches the arc edges of the first cover plate 21 and the second cover plate 22; a second silicone sealing strip 42 is pasted in a circular arc shape on the inner wall inside the air duct 1; in this way, when the cover plate assembly 2 is closed, the first silicone sealing strip 41 on the first cover plate 21 and the second silicone sealing strip 42 at the corresponding position of the air duct 1 are squeezed and fitted to each other, and the first silicone sealing strip 41 on the second cover plate 22 and the second silicone sealing strip 42 at the corresponding position of the air duct 1 are squeezed and fitted to each other, which can meet the close contact between the cover plate assembly 2 and the air duct 1, ensure no air leakage, no air return, and not affect the normal opening and closing of the cover plate assembly.

[0053] In a specific embodiment, the air valve structure further includes a second sealing assembly 5, as Figure 4 and 8 shown, the second sealing assembly 5 is disposed inside the air duct 1, and when the cover plate assembly 2 is closed, the second sealing assembly 5 can block the gap between the first cover plate 21 and the second cover plate 22.

[0054] Specifically, in the cover plate assembly of a traditional air valve, there is a gap between the first cover plate and the second cover plate, and there is a risk of air leakage or air return in this gap. However, if no gap is reserved, it will cause interference in the opening and closing of the cover plate. The second sealing assembly 5 provided in this embodiment can seal this gap.

[0055] In a specific embodiment, the second sealing assembly 5 includes a fixing member, a duct silicone sealing strip 52 and a cover plate silicone sealing strip 53. The fixing member is arranged at the outlet of the duct 1 and extends radially from one end of the duct 1 to the other end. A groove 51 is provided on the fixing member. The duct silicone sealing strip 52 is located in the groove 51. The cover plate silicone sealing strip 53 is arranged on the side of the cover plate assembly 2 facing the duct 1. And when the cover plate assembly 2 is closed, the duct silicone sealing strip 52 and the cover plate silicone sealing strip 53 can be extrusion-fitted to seal the gap between the first cover plate 21 and the second cover plate 22.

[0056] Specifically, at a position slightly closer to the inside of the duct 1 at the outlet of the duct 1, a fixing member is arranged radially. This fixing member is mainly used to provide a position for accommodating the duct silicone sealing strip 52. Therefore, a groove 51 is opened on the fixing member. This groove 51 is a U-shaped groove 51. And when cut along the axial direction of the duct 1, the cross-section of the groove 51 is U-shaped. The duct silicone sealing strip 52 is pasted on the bottom of the U-shaped groove 51. When the cover plate assembly 2 is closed, the gap between the first cover plate 21 and the second cover plate 22 can exactly correspond to the U-shaped groove 51. In addition, the cover plate silicone sealing strip 53 is pasted on the back of the first cover plate 21 and the second cover plate 22. In this way, when the cover plate assembly 2 is closed and locked, the cover plate silicone sealing strip 53 and the duct silicone sealing strip 52 are extruded and fitted to each other to satisfy the close contact between the cover plate assembly 2 and the duct 1, ensuring that the gap between the first cover plate 21 and the second cover plate 22 does not leak air.

[0057] In a specific embodiment, the air valve structure further includes a heat preservation assembly, and the heat preservation assembly is attached to the side of the cover plate assembly 2 facing the duct 1. The cover plate assembly 2 is lined with a heat preservation assembly, which can effectively keep warm for heat insulation or cold insulation, avoid the influence of external factors on the suitable temperature in the poultry house, reduce the stress of poultry and livestock, and improve the comfort level.

[0058] In a specific embodiment, the heat preservation assembly is a heat preservation layer matching the shape of the cover plate assembly 2. The material of the heat preservation layer is one of polystyrene foam plastic, cotton or sponge.

[0059] Among them, polystyrene foam plastic is an EPS heat preservation material, which is made with polystyrene resin as the main body and adding additives such as foaming agents, and has good heat preservation performance. Cotton has many slender and soft fibers, and its shape and structure can fix air between the fibers, having the function of naturally blocking the entry of cold and hot air, so it can also keep warm.

[0060] In a specific embodiment, the air valve structure further includes a controller, which is connected to the driving component 3. The controller is configured to control the opening or closing of the cover plate component 2 according to the working state of the fan, and simultaneously control the energization or power-off of the driving component 3. Wherein, the fan is used to achieve ventilation through the air duct 1.

[0061] When the controller senses that the fan is about to be powered on and start, it releases a signal to the permanent magnet stepper motor to immediately energize and rotate forward by 90°, while driving the cover plate component to rotate by 90°. After it is fully opened, it immediately powers off and relies on the suction force between the permanent magnet rotor and the stator of the permanent magnet stepper motor to fix the position of the cover plate component 2, so that it remains in an open state of 90°. When the controller senses that the fan is powered off, it releases a signal to the permanent magnet stepper motor to reverse-energize, realize reverse rotation, drive the cover plate component 2 to reverse-rotate by 90° to fully close, and then immediately powers off and locks it to keep it in close contact with the inner wall surface of the air duct 1.

[0062] The air valve structure provided in this embodiment has a simple structure, obvious effects, and can greatly reduce energy consumption. It can solve the problems of ordinary self-opening and closing air valves that need to rely on wind force to open and maintain the open state, fall by their own weight when closing but cannot be completely sealed tightly, there is a risk of air leakage or return air, cannot effectively insulate heat or cold, affect the air temperature in the poultry house, and waste energy due to wind force loss. This embodiment uses a permanent magnet stepper motor to control the opening and closing of the cover plate component to reduce energy consumption, uses a silicone sealing strip to strengthen the sealing effect when the cover plate component closes, and uses a heat preservation component to effectively insulate heat or cold, avoid the influence of external factors on the suitable temperature in the poultry house, reduce the stress of poultry and livestock, improve comfort, and at the same time meet the high-efficiency and energy-saving requirements of the market and industry development.

[0063] Embodiment 2

[0064] This embodiment provides a farm, and the air valve structure described in Embodiment 1 is provided at the ventilation opening of the farm.

[0065] In summary, it is easy for those skilled in the art to understand that, on the premise of no conflict, the above-mentioned advantageous technical features can be freely combined and superimposed.

[0066] The above are only the preferred embodiments of the present invention, and do not impose any form of limitation on the present invention. Any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A damper structure, characterized in that: The air valve structure includes an air duct, a cover assembly and a driving assembly, wherein the cover assembly is arranged at the outlet of the air duct, and the driving assembly is connected to the cover assembly to drive the cover assembly to open or close; Wherein, the driving component includes a permanent magnet stepper motor, which is connected to the cover assembly. After power is supplied, the permanent magnet stepper motor can drive the cover assembly to open or close, and after power is cut off, the cover assembly can maintain the current state.

2. The air valve structure according to claim 1, characterized in that: The cover plate assembly includes a first cover plate and a second cover plate, and the drive assembly includes a first permanent magnet stepper motor and a second permanent magnet stepper motor, the first permanent magnet stepper motor is connected to the first cover plate, and the second permanent magnet stepper motor is connected to the second cover plate; when the first cover plate and the second cover plate are opened at the same time, they can open the outlet of the air duct.

3. The air valve structure according to claim 1, characterized in that: The air valve structure further comprises a first sealing component, and when the cover plate component is closed, the first sealing component is arranged at the connection between the cover plate component and the inner wall of the air duct.

4. The air valve structure according to claim 3, characterized in that: The first sealing assembly includes a first silicone sealing strip arranged on the edge of the cover assembly, and a second silicone sealing strip arranged on the inner wall of the air duct. When the cover assembly blocks the outlet of the air duct, the first silicone sealing strip and the second silicone sealing strip can be squeezed together to seal the gap between the cover assembly and the air duct.

5. The air valve structure according to claim 2, characterized in that: The air valve structure further includes a second sealing component, which is disposed in the air duct. When the cover plate assembly is closed, the second sealing component can seal the gap between the first cover plate and the second cover plate.

6. The air valve structure according to claim 5, characterized in that: The second sealing assembly includes a fixing member, an air duct silicone sealing strip and a cover plate silicone sealing strip, the fixing member is arranged at the outlet of the air duct and radially extends from one end of the air duct to the other end, the fixing member is provided with a groove, the air duct silicone sealing strip is located in the groove, and the cover plate silicone sealing strip is arranged on a side of the cover plate assembly facing the air duct; and when the cover plate assembly is closed, the air duct silicone sealing strip and the cover plate silicone sealing strip can be squeezed together to seal the gap between the first cover plate and the second cover plate.

7. The air valve structure according to claim 1, characterized in that: The air valve structure further comprises a heat preservation component, and the heat preservation component is attached to a side of the cover plate component facing the air duct.

8. The air valve structure according to claim 7, characterized in that: The thermal insulation component is a thermal insulation layer that matches the shape of the cover plate component; and / or the thermal insulation layer is made of one of polystyrene foam, cotton or sponge.

9. The air valve structure according to claim 1, characterized in that: The air valve structure also includes a controller, which is connected to the drive assembly. The controller is used to control the cover assembly to open or close according to the working state of the fan, and to control the drive assembly to power on or off; wherein the fan is used to achieve ventilation through the air duct.

10. A breeding farm, characterized in that: The ventilation opening of the farm is provided with a wind valve structure as described in any one of claims 1-9.

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