Air valve assembly and air outlet mechanism with same

Abstract

The air valve assembly comprises an outer frame and a valve blade set, an air opening is formed in the inner side of the outer frame, the valve blade set is arranged on the inner side of the outer frame and used for opening or closing the air opening, and the valve blade set at least comprises two valve blades. The valve blades are sequentially arranged in the direction from the center of the outer frame to the outer side of the outer frame, and the air opening area controlled by the valve blades in the direction from the center of the outer frame to the outer side of the outer frame is gradually increased. According to the air valve assembly, when the air valve assembly is applied to the air outlet side of the axial flow fan and the axial flow fan supplies air into a poultry house, due to the fact that the air opening area controlled by the valve blades is matched with the air pressure generated by the fan, the pressure difference of air force at different positions can be reduced, and therefore uniform air supply is achieved; uniform air supply can effectively maintain the appropriate environment temperature in the poultry house, reduce the concentration of harmful gas, reduce the stress reaction of livestock and promote the healthy growth of the livestock so as to improve the productivity.

Description

Technical Field

[0001] The present invention belongs to the technical field of air outlet, and in particular relates to an air valve assembly and an air outlet mechanism having the same. Background Art

[0002] Livestock dampers play an important role in modern animal husbandry. They are mainly used to improve the living environment of livestock and provide good ventilation conditions to promote the healthy growth of livestock and improve production efficiency. At present, livestock farms mostly use axial flow fans with self-opening and closing dampers to achieve ventilation, and uniform ventilation helps to maintain the temperature, humidity and air quality in the poultry house within a suitable range, which is not only important for the living comfort of livestock and poultry, but also directly affects their health and growth. At the same time, uniform ventilation also helps to discharge harmful gases such as ammonia, carbon dioxide and hydrogen sulfide produced by livestock and poultry in the poultry house, keep the air fresh, reduce the growth of bacteria and pathogens, and reduce the risk of livestock and poultry contracting diseases. Furthermore, reasonable ventilation design can also reduce unnecessary energy consumption, such as avoiding excessive cooling or heating by precisely controlling the ventilation volume, thereby achieving energy conservation and emission reduction.

[0003] The test shows that the maximum values ​​of the axial deformation and radial deformation of the fan blade appear at the top of the blade, which indicates that the force point of the fan blade is on the outer ring of the fan blade. That is, when the fan blade is working, the force on the inner and outer rings is unbalanced (wind pressure is unequal), so the wind volume generated is larger on the outer ring than on the inner ring. When the fan blade rotates, the wind generated is vortex-shaped, and it is impossible to ensure uniform air supply, which may cause local overheating or overcooling (uneven wind speed and air volume), which is not conducive to the healthy growth of poultry and livestock. Summary of the invention

[0004] Therefore, the present invention provides a damper assembly, which can solve the technical problem that the existing damper cannot ensure uniform air supply from the fan, which easily causes local overheating or overcooling in the poultry house, thus being detrimental to the healthy growth of poultry and livestock.

[0005] In order to solve the above problems, the present invention provides an air valve assembly, including an outer frame and a valve leaf group, wherein an air outlet is formed on the inner side of the outer frame, and the valve leaf group is arranged on the inner side of the outer frame. The valve leaf group is used to open or close the air outlet, and the valve leaf group includes at least two valve leaves, each of which is arranged in sequence from the center of the outer frame to the outer side of the outer frame, and the air outlet area controlled by each valve leaf gradually increases in the direction from the center of the outer frame to the outer side of the outer frame.

[0006] In some embodiments, a bracket connected to the outer frame is disposed on the inner side of the outer frame, and the bracket divides the air outlet into a plurality of areas distributed along the circumferential direction, and the valve leaf group is disposed in each of the areas.

[0007] In some embodiments, each valve leaf is connected to a rotating shaft, and each rotating shaft can rotate relative to the bracket; and / or each valve leaf automatically opens under the action of wind, and after the wind force disappears, each valve leaf automatically closes under the action of gravity.

[0008] In some embodiments, with the orientation of the air valve assembly in use as a reference, a portion of the multiple areas are a first area group, and the first area group is located in the upper half of the inner side of the outer frame. When each valve leaf closes the air outlet, each valve leaf in the first area group that is closest to the outer frame has a first side facing the center of the outer frame, and each of the remaining valve leaves in the first area group has a second side that is back to the center of the outer frame; each of the rotating shafts on each of the valve leaves in the first area group that is closest to the outer frame is located on each of the first sides, and an opening angle of each of the valve leaves in the first area group that is closest to the outer frame is less than 90°, and each of the rotating shafts on the remaining valve leaves in the first area group is located on each of the second sides.

[0009] In some embodiments, the remaining number of the multiple areas are a second area group, and the second area group is located in the lower half of the inner side of the outer frame. When each valve leaf closes the air outlet, each valve leaf in the second area group has a third side facing the center of the outer frame, and each rotating shaft on each valve leaf in the second area group is respectively located on each third side.

[0010] In some embodiments, the air valve assembly also includes a wind tube, the outer frame is fixed at one end of the wind tube, the other end of the wind tube has an end surface on a vertical plane, the outer frame is inclined on the wind tube, and the outer frame gets closer and closer to the end surface from bottom to top.

[0011] In some embodiments, a pin is provided at the end of each rotating shaft, each of the pins is assembled on the bracket, and each of the rotating shafts is configured with a socket extending along its axial direction, and each of the pins is respectively inserted into the socket.

[0012] In some embodiments, the diameter of the pin shaft tends to increase in a direction from one end of the pin shaft inserted in the rotating shaft to one end of the pin shaft away from the rotating shaft, and the pin shaft can move along the insertion hole.

[0013] In some embodiments, each of the pin shafts is plugged with a pin, and the pin has a plug-in portion and a clamping portion. The pin shaft is configured with a plurality of radial through holes penetrating the pin shaft, and each of the through holes is spaced apart along the axial direction of the pin shaft. The plug-in portion is connected to the bracket after passing through any of the through holes, and the clamping portion clamps the pin shaft.

[0014] The present invention also provides an air outlet mechanism, comprising the aforementioned air valve assembly.

[0015] The present invention provides an air valve assembly and an air outlet mechanism having the same, which have the following beneficial effects:

[0016] When the air valve assembly of the present application is applied to the air outlet side of an axial flow fan and the axial flow fan supplies air into a poultry house, the air outlet area controlled by each valve blade gradually increases in the direction from the center of the outer frame to the outside of the outer frame, and the wind pressure generated by the axial flow fan gradually increases from the root of the fan blade to the top of the fan blade. Then the air outlet area controlled by each valve blade matches the wind pressure generated by the fan, thereby reducing the pressure difference of the wind force at different positions, that is, the wind pressure per unit area in the air outlet is basically the same, thereby achieving uniform air supply. Uniform air supply can effectively maintain a suitable ambient temperature in the poultry house, reduce the concentration of harmful gases, reduce the stress response of poultry and livestock, and promote the healthy growth of poultry and livestock to increase production capacity. Moreover, uniform air supply can also reduce unnecessary energy consumption, for example, by accurately controlling the air supply volume to avoid excessive cooling or heating, thereby achieving energy conservation and emission reduction. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the implementation methods of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the implementation methods or the description of the prior art. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0018] Figure 1 It is a schematic diagram of each valve leaf of the air valve assembly of an embodiment of the present invention being in a half-open state;

[0019] Figure 2 It is a schematic diagram of each valve leaf of the air valve assembly of an embodiment of the present invention being in a fully open state;

[0020] Figure 3 It is a schematic diagram of each valve leaf of the air valve assembly of an embodiment of the present invention being in a closed state;

[0021] Figure 4 It is a schematic diagram showing that each valve leaf in an area inside the outer frame of the air valve assembly according to an embodiment of the present invention is in a closed state;

[0022] Figure 5 It is an exploded schematic diagram of each valve leaf in an area inside the outer frame of the air valve assembly according to an embodiment of the present invention;

[0023] Figure 6It is a schematic diagram showing that the valve leaf in a region inside the outer frame of the air valve assembly according to the embodiment of the present invention is assembled on the bracket and the thin section of the pin shaft is inserted into the insertion hole of the rotating shaft;

[0024] Figure 7 for Figure 6 An enlarged schematic diagram of the air valve assembly at point A of an embodiment of the present invention;

[0025] Figure 8 It is a schematic diagram showing that the valve leaf in an area inside the outer frame of the air valve assembly according to an embodiment of the present invention is assembled on the bracket and the middle section of the pin shaft is inserted into the insertion hole of the rotating shaft;

[0026] Fig. 9 for Figure 8 An enlarged schematic diagram of the air valve assembly at B of an embodiment of the present invention;

[0027] Fig.10 It is a schematic diagram showing that the valve leaf in a region inside the outer frame of the air valve assembly according to the embodiment of the present invention is assembled on the bracket and the thick section of the pin shaft is inserted into the insertion hole of the rotating shaft;

[0028] Fig.11 for Fig.10 An enlarged schematic diagram of the air valve assembly at C of an embodiment of the present invention;

[0029] Fig.12 is a schematic diagram of a pin shaft of a wind valve assembly according to an embodiment of the present invention;

[0030] Fig.13 is a schematic diagram of a pin of a wind valve assembly according to an embodiment of the present invention;

[0031] Fig.14 A schematic structural diagram of a wind valve assembly according to an embodiment of the present invention;

[0032] Fig.15 Schematic diagram of an explosion of a damper assembly according to an embodiment of the present invention.

[0033] The reference numerals are as follows:

[0034] 1. Outer frame; 2. Valve leaf; 3. Bracket; 4. Rotating shaft; 5. Air cylinder; 51. First cylinder shell; 52. Second cylinder shell; 6. Pin shaft; 7. Pin; 71. Connecting part; 72. Clamping part; 8. Baffle. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the devices or elements referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention. The directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0037] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0038] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0039] See also Figures 1 to 15As shown, according to an embodiment of the present invention, there is provided an air valve, comprising an outer frame 1 and a valve leaf group, an air outlet is formed on the inner side of the outer frame 1, the valve leaf group is arranged on the inner side of the outer frame 1, the valve leaf group is used to open or close the air outlet, the valve leaf group comprises at least two valve leaves 2, each valve leaf 2 is arranged in sequence from the center of the outer frame 1 to the outer side of the outer frame 1, and the air outlet area controlled by each valve leaf 2 gradually increases in the direction from the center of the outer frame 1 to the outer side of the outer frame 1.

[0040] In this technical solution, when the air valve assembly of the present application is applied to the air outlet side of the axial flow fan and the axial flow fan supplies air into the poultry house, the air outlet area controlled by each valve leaf 2 gradually increases in the direction from the center of the outer frame 1 to the outside of the outer frame 1, and the wind pressure generated by the axial flow fan gradually increases from the root of the fan blade to the top of the fan blade. Then the air outlet area controlled by each valve leaf 2 matches the wind pressure generated by the fan, thereby reducing the pressure difference of the wind force at different positions, that is, the wind pressure per unit area in the air outlet is basically the same, thereby achieving uniform air supply. Uniform air supply can effectively maintain a suitable ambient temperature in the poultry house, reduce the concentration of harmful gases, reduce the stress response of poultry and livestock, and promote the healthy growth of poultry and livestock to increase production capacity. Moreover, uniform air supply can also reduce unnecessary energy consumption, for example, by accurately controlling the air supply volume to avoid excessive cooling or heating, thereby achieving energy conservation and emission reduction.

[0041] See also Figures 1 to 3 As shown, a bracket 3 connected to the outer frame 1 is arranged on the inner side of the outer frame 1 , and the bracket 3 divides the air outlet into a plurality of areas distributed along the circumferential direction, and a valve leaf group is arranged in each area.

[0042] In this embodiment, the air outlet is divided into a plurality of areas distributed along the circumferential direction by providing the bracket 3 so that the air outlet is fragmented, and when the valve leaf group is provided in each area, the air outlet of the entire air outlet can be more uniform. Preferably, the area of ​​each area is the same.

[0043] As a specific implementation, each valve leaf 2 is connected to a rotating shaft 4, and each rotating shaft 4 can rotate relative to the bracket 3, that is, each valve leaf 2 is arranged in the outer frame 1 in a rotating manner. Further, each valve leaf 2 automatically opens under the action of wind, and after the wind disappears, each valve leaf 2 automatically closes under the action of gravity. This shows that each valve leaf 2 is automatically opened and closed in a rotating manner, so that the air valve assembly is fully automated. Among them, the rotating shaft 4 is a hollow metal rod, and each valve leaf 2 opens the air outlet in an outward-turned form.

[0044] See also Figure 1 and Fig.14As shown, the air valve assembly of the present application is a side outlet, so the air valve assembly is installed in the up and down direction. Taking the orientation of the air valve assembly in the use state as a reference, a part of the plurality of areas mentioned above is the first area group, and the first area group is located in the upper half of the inner side of the outer frame 1. When each valve leaf 2 closes the air outlet, each valve leaf 2 in the first area group closest to the outer frame 1 has a first side facing the center of the outer frame 1, and the remaining valve leaves 2 in the first area group have a second side facing away from the center of the outer frame 1; each rotating shaft 4 on each valve leaf 2 in the first area group closest to the outer frame 1 is respectively located on each first side, and the opening angle of each valve leaf 2 in the first area group closest to the outer frame 1 is less than 90°, and each rotating shaft 4 on each remaining valve leaf 2 in the first area group is respectively located on each second side.

[0045] In this technical solution, when the rotating shaft 4 on each valve leaf 2 located in the upper half of the inner side of the outer frame 1 is on the second side of the valve leaf 2, it is equivalent to the rotating shaft 4 being located in a position slightly above the valve leaf 2. Then, after each valve leaf 2 in the upper half is automatically opened under the impact of wind, if the fan stops working, each valve leaf 2 in the upper half will automatically reset to a closed state under the action of gravity, so that each valve leaf 2 in the upper half can automatically open and close the air outlet in the upper half. In addition, because the outer frame 1 of the present application is a circular ring structure, each valve leaf 2 in the upper half that is closest to the outer frame 1 needs to cooperate with the outer frame 1, so the cross-section of each valve leaf 2 in the upper half that is closest to the outer frame 1 is an arc. However, these valve leaves 2 cannot rotate with their arc-shaped edges as axes, so the rotating shaft 4 on each valve leaf 2 in the upper half that is closest to the outer frame 1 is fixed to the first side of the valve leaf 2. At this time, the rotating shafts 4 are fixed at a lower position on the valve leaf 2. In order to enable the valve leaves 2 closest to the outer frame 1 in the upper half to automatically switch to the closed state after the fan stops working, the opening angle of the valve leaves 2 in the open state needs to be less than 90°. As for how to achieve an opening angle less than 90°, a stop structure can be set on the bracket 3, and the stop structure limits the rotation of the valve leaf 2 so that its opening angle does not exceed 90°.

[0046] See also Figure 1 and Fig.14 As shown, the remaining number of areas among the aforementioned multiple areas are the second area group, and the second area group is located in the lower half of the inner side of the outer frame 1. When the valve leaves 2 close the air outlet, each valve leaf 2 in the second area group has a third side facing the center of the outer frame 1, and each rotating shaft 4 on each valve leaf 2 in the second area group is respectively located on each third side.

[0047] In this embodiment, when the rotating shaft 4 on each valve leaf 2 located in the lower half of the inner side of the outer frame 1 is at the third side of the valve leaf 2, it is equivalent to the rotating shaft 4 being located at a position slightly above the valve leaf 2. Then, after each valve leaf 2 in the lower half is automatically opened under the impact of wind, if the fan stops working, each valve leaf 2 in the lower half will automatically switch to a closed state under the action of gravity, so that each valve leaf 2 in the lower half can automatically open and close the air outlet in the upper half. It can be understood that, whether it is each valve leaf 2 in the lower half of the inner side of the outer frame 1 or each valve leaf 2 in the upper half of the inner side of the outer frame 1, as long as the rotating shaft 4 is located at a position slightly above the valve leaf 2, even if the opening angle of the valve leaf 2 exceeds 90°, each valve leaf 2 can automatically reset to a closed state after the fan stops working.

[0048] It should be noted that the bracket 3 is a cross structure, and the bracket 3 divides the air outlet into four areas distributed along the circumferential direction. The areas of the four areas are the same, and two of the areas are located in the upper half of the inner side of the outer frame 1, and the other two areas are located in the lower half of the inner side of the outer frame 1. A baffle 8 is arranged at the center of the bracket 3, and the cross-section of the baffle 8 is a rhombus. The cross-section of each valve leaf 2 closest to the bracket 3 is an arc, and the cross-sections of the other valve leaves 2 are all trapezoidal. From the center of the outer frame 1 to the outside of the outer frame 1, the cross-sectional area of ​​each valve leaf 2 gradually increases, that is, the air outlet area controlled by each valve leaf 2 gradually increases. Among them, the setting of the baffle 8 makes it more convenient to install each valve leaf 2 around the baffle 8.

[0049] See also Fig.14 As shown, the air valve assembly also includes an air cylinder 5, an outer frame 1 is fixed at one end of the air cylinder 5, and the other end of the air cylinder 5 has an end face on a vertical plane, and the outer frame 1 is tilted on the air cylinder 5, and the outer frame 1 is closer and closer to the end face from bottom to top. As mentioned above, the air valve assembly is a side outlet. When the outer frame 1 is closer and closer to the end face from bottom to top, it indicates that all the valve leaves 2 are tilted backward. Such a design can further ensure that all the valve leaves 2 can be automatically reset to a closed state under the action of gravity after the fan stops working. Among them, the air cylinder 5 is assembled by fixing the first cylinder shell 51 and the second cylinder shell 52 together by screws, and the inner side of the air cylinder 5 forms an air duct. It can be understood that one axial end of the air cylinder 5 can also be designed to be tilted, so when the outer frame 1 is installed at the tilted end, the outer frame 1 and all the valve leaves 2 are naturally tilted.

[0050] See also Figures 6 to 11 As shown, each end of each rotating shaft 4 is provided with a pin 6, each pin 6 is assembled on the bracket 3, each rotating shaft 4 is configured with a socket extending along its axial direction, and each pin 6 is respectively inserted into each socket. The provision of each pin 6 enables each valve leaf 2 to be more conveniently assembled on the bracket 3, and each valve leaf 2 rotates with each pin 6 as a fulcrum. The pin 6 is a rod-shaped structure made of metal material.

[0051] See also Figures 6 to 11 As shown, the diameter of the pin 6 increases from one end of the pin 6 inserted in the rotating shaft 4 to the end of the pin 6 away from the rotating shaft 4, and the pin 6 can move along the insertion hole.

[0052] In this embodiment, since the diameter of the pin shaft 6 is increasing, the close fit between the pin shaft 6 and the rotating shaft 4 can be controlled by controlling the depth of the pin shaft 6 inserted into the rotating shaft 4, thereby achieving the purpose of controlling the opening angle of the valve leaf 2 and controlling whether the valve leaf 2 is open. Specifically, the pin shaft 6 can be a tapered structure with a gradually increasing diameter, or a three-stage rod-shaped structure with a successively increasing diameter. Fig.12 As shown, when the pin shaft 6 is a three-section rod-shaped structure, the front section of the pin shaft 6 has the smallest diameter, which can be called the thin section; the middle section has the second largest diameter, which can be called the middle section; and the rear section has the largest diameter, which can be called the thick section. When the thin section of the pin shaft 6 is inserted into the insertion hole of the rotating shaft 4, the clearance between the pin shaft 6 and the rotating shaft 4 is matched, and the rotation amplitude of the valve leaf 2 is not affected; when the middle section of the pin shaft 6 is inserted into the insertion hole of the rotating shaft 4, the clearance between the pin shaft 6 and the rotating shaft 4 is reduced, the rotation amplitude of the valve leaf 2 is affected, and the opening angle of the valve leaf 2 is reduced; when the thick section of the pin shaft 6 is inserted into the insertion hole of the rotating shaft 4, the pin shaft 6 and the rotating shaft 4 are interference-fitted, the pin shaft 6 and the rotating shaft 4 are locked, and the valve leaf 2 cannot rotate. When the user has special needs and does not need all the valve leaves 2 on the air valve assembly to rotate normally, it is only necessary to adjust the depth of the corresponding pin shaft 6 inserted into the rotating shaft 4, that is, the above-mentioned design of the pin shaft 6 can better meet the different needs of customers.

[0053] See also Figures 6 to 13 As shown, each pin shaft 6 is plugged with a pin 7, and the pin 7 has an inserting portion 71 and a clamping portion 72. The pin shaft 6 is constructed with a plurality of radial through holes penetrating the pin shaft 6, and the through holes are spaced apart along the axial direction of the pin shaft 6. The inserting portion 71 is connected to the bracket 3 after penetrating any through hole, and the clamping portion 72 clamps the pin shaft 6.

[0054] In this technical solution, when the plug-in portion 71 of the pin 7 passes through any through hole and is connected to the bracket 3, and the clamping portion 72 clamps the pin shaft 6, the pin shaft 6 is fixed. It can be understood that the bracket 3 is constructed with a mounting hole, and the pin shaft 6 passes through the mounting hole and is inserted into the insertion hole of the rotating shaft 4. When it is necessary to adjust the depth of the pin shaft 6 inserted into the rotating shaft 4, the pin 7 is first pulled out from the pin shaft 6, and then force is applied to the pin shaft 6 to move it relative to the rotating shaft 4. After the depth of the pin shaft 6 inserted into the rotating shaft 4 is adjusted, the pin 7 is inserted into the corresponding through hole and connected to the bracket 3, and at the same time, the clamping portion 72 of the pin 7 clamps the pin shaft 6 to fix the pin shaft 6. Among them, the pin 7 is made of metal material, and the shape of the pin 7 is R-shaped, so the pin 7 can be called an R-type pin. It should be noted that, in order to ensure that each valve leaf 2 moves more smoothly during opening and closing, the pin shaft 6 and the pin 7 can be provided in two groups, and the two groups of pin shafts 6 and pins 7 are respectively provided at both ends of the rotating shaft 4.

[0055] The present invention also provides an air outlet mechanism, including an axial flow fan and the aforementioned air valve assembly, wherein the outer frame 1 of the air valve assembly and each valve leaf group are arranged on the air outlet side of the axial flow fan. It can be understood that the air outlet mechanism of the present application can be applied to livestock houses in breeding farms, as well as to various relatively sealed occasions such as worker workshops and cave dwellings, so as to meet the ventilation needs of various customers and improve ventilation comfort.

[0056] It is easy for those skilled in the art to understand that, without conflict, the advantageous technical features of the above-mentioned methods can be freely combined and superimposed.

[0057] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the present invention. The above are only preferred embodiments of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and variations can be made without departing from the technical principles of the present invention, and these improvements and variations should also be regarded as the protection scope of the present invention.

Claims

1. A damper assembly, characterized in that: The invention comprises an outer frame (1) and a valve leaf group, wherein an air outlet is formed on the inner side of the outer frame (1), the valve leaf group is arranged on the inner side of the outer frame (1), and the valve leaf group is used to open or close the air outlet. The valve leaf group comprises at least two valve leaves (2), and each of the valve leaves (2) is arranged in sequence from the center of the outer frame (1) to the outer side of the outer frame (1), and the air outlet area controlled by each of the valve leaves (2) gradually increases in the direction from the center of the outer frame (1) to the outer side of the outer frame (1).

2. The air valve assembly according to claim 1, characterized in that: A bracket (3) connected to the outer frame (1) is arranged on the inner side of the outer frame (1); the bracket (3) divides the air outlet into a plurality of areas distributed along the circumferential direction; each of the areas is provided with the valve leaf group.

3. The air valve assembly according to claim 2, characterized in that: Each of the valve leaves (2) is connected to a rotating shaft (4), and each of the rotating shafts (4) can rotate relative to the bracket (3); and / or each of the valve leaves (2) automatically opens under the action of wind, and after the wind disappears, each of the valve leaves (2) automatically closes under the action of gravity.

4. The air valve assembly according to claim 3, characterized in that: With reference to the orientation of the air valve assembly in use, a portion of the plurality of areas is a first area group, the first area group is located in the upper half of the inner side of the outer frame (1), and when each valve leaf (2) closes the air outlet, each valve leaf (2) in the first area group that is closest to the outer frame (1) has a first side facing the center of the outer frame (1), and each of the remaining valve leaves (2) in the first area group has a second side facing away from the center of the outer frame (1); each of the rotating shafts (4) on each of the valve leaves (2) in the first area group that is closest to the outer frame (1) is located on each of the first sides, and the opening angle of each of the valve leaves (2) in the first area group that is closest to the outer frame (1) is less than 90°, and each of the rotating shafts (4) on each of the remaining valve leaves (2) in the first area group is located on each of the second sides.

5. The air valve assembly according to claim 4, characterized in that: The remaining number of the areas among the plurality of areas are a second area group, and the second area group is located in the lower half of the inner side of the outer frame (1). When each valve leaf (2) closes the air outlet, each valve leaf (2) in the second area group has a third side facing the center of the outer frame (1), and each rotating shaft (4) on each valve leaf (2) in the second area group is located on each third side.

6. The air valve assembly according to claim 5, characterized in that: It also comprises a wind tube (5), wherein the outer frame (1) is fixed to one end of the wind tube (5), the other end of the wind tube (5) has an end face on a vertical plane, the outer frame (1) is arranged obliquely on the wind tube (5), and the outer frame (1) gets closer and closer to the end face from bottom to top.

7. The air valve assembly according to claim 3, characterized in that: A pin shaft (6) is provided at the end of each rotating shaft (4), each pin shaft (6) is assembled on the bracket (3), and each rotating shaft (4) is provided with a socket extending along its axial direction, and each pin shaft (6) is respectively inserted into each socket.

8. The air valve assembly according to claim 7, characterized in that: In a direction from one end of the pin shaft (6) inserted into the rotating shaft (4) to one end of the pin shaft (6) away from the rotating shaft (4), the diameter of the pin shaft (6) tends to increase, and the pin shaft (6) can move along the insertion hole.

9. The air valve assembly according to claim 8, characterized in that: Each of the pin shafts (6) is plugged with a pin (7), and the pin (7) has an inserting portion (71) and a clamping portion (72). The pin shaft (6) is provided with a plurality of radial through holes penetrating the pin shaft (6), and the through holes are spaced apart along the axial direction of the pin shaft (6). The inserting portion (71) is connected to the bracket (3) after penetrating any of the through holes, and the clamping portion (72) clamps the pin shaft (6).

10. An air outlet mechanism, characterized in that: It comprises an axial flow fan and the air valve assembly according to any one of claims 1 to 9, wherein the outer frame (1) and the valve leaf assembly are both arranged on the air outlet side of the axial flow fan.

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