Air outlet valve and ventilation fan

Abstract

The invention provides an air outlet valve and a ventilation fan, the air outlet valve comprises an air valve barrel, a first cover plate assembly and a second cover plate assembly are arranged in an air outlet of the air valve barrel, the first cover plate assembly comprises a first cover plate, and the second cover plate assembly comprises a second cover plate; the first cover plate and the second cover plate have a tiled non-return state for blocking the air outlet and an overturning through-flow state for penetrating through the air outlet, and further comprise a driving device and a locking device; the driving device is used for driving the first cover plate and the second cover plate to rotate synchronously so that the first cover plate and the second cover plate can be switched between the tiled non-return state and the turnover through-flow state, and the locking device is used for locking the first cover plate and the second cover plate in the tiled non-return state or the turnover through-flow state. The technical defects that in the prior art, due to the fact that a cover plate needs fan air pressure to resist the dead weight of the cover plate, energy is wasted, and opening or closing of an air valve is not reliable can be effectively overcome.

Description

Technical Field

[0001] The present invention belongs to the technical field of air conditioning, and in particular relates to an air outlet valve and a ventilation fan. Background Art

[0002] In the livestock industry, in order to ensure a stable environment in centralized breeding rooms, dedicated ventilation ducts are generally used for air intake and outlet. A matching fan + damper is used to accelerate the air flow in the duct and adjust the temperature of the breeding site. Currently, "fan + self-opening and closing damper" is commonly used to achieve ventilation and temperature control and prevent backdraft. The disadvantage of this fan + damper structure is that it relies on the wind power of the fan to blow open the damper cover, and the wind power always supports the damper cover to remain open. When the fan stops running, the cover will fall by gravity and cover the air outlet. Figure 1 and Figure 2 Only with the tilted design shown in the figure can the left and right covers close the air duct by their own weight after the fan stops. During fan operation, not only will there be a power loss of more than 5%, resulting in increased fan current and energy waste, but there is also the risk of the damper cover being unable to open or close, causing an unstable breeding environment on the farm and affecting production and quality. Summary of the Invention

[0003] Therefore, the present invention provides an air outlet valve and a ventilation fan, which can overcome the technical problems in the related technology that the cover plate is tilted, the inclined structure relies on the pressure difference of the fan outlet air flow to open, and relies on the cover plate's own weight to close, which wastes energy and has the hidden danger of the air valve cover plate not being able to open or cover.

[0004] In order to solve the above problems, the present invention provides an air outlet valve, including an air valve cylinder, and a first cover plate assembly and a second cover plate assembly are provided in the air outlet of the air valve cylinder, the first cover plate assembly includes a first cover plate, and the second cover plate assembly includes a second cover plate, the first cover plate and the second cover plate have a flat check state for blocking the air outlet and a flip flow state for passing through the air outlet, and also include a driving device and a locking device, the driving device is used to drive the first cover plate and the second cover plate to rotate synchronously to realize the switching of the first cover plate and the second cover plate between the flat check state and the flip flow state, and the locking device is used to lock the first cover plate and the second cover plate in the flat check state or the flip flow state.

[0005] In some embodiments, the first cover plate assembly further includes a first rotating shaft fixedly connected to the first cover plate, the second cover plate assembly further includes a second rotating shaft fixedly connected to the second cover plate, the first end of the first rotating shaft and the first end of the second rotating shaft are pivotally connected to the air valve cylinder, the second end of the first rotating shaft has a first transmission gear, the second end of the second rotating shaft has a second transmission gear, the first transmission gear is engaged with the second transmission gear, and the driving device includes a rotary motor, which drives one of the rotating shaft and the second rotating shaft to rotate.

[0006] In some embodiments, a transmission gear disc is further provided on the second end of the first rotating shaft and the first transmission gear is located between the outer cylinder wall of the air valve cylinder and the transmission gear disc. The rotating shaft of the rotary motor is arranged parallel to and spaced apart from the first rotating shaft. The rotary motor is assembled on the outer cylinder wall of the air valve cylinder, and the shaft extension end of the rotary motor faces away from the outer cylinder wall of the air valve cylinder. The rotating shaft of the rotary motor is meshed with the transmission gear disc.

[0007] In some embodiments, when the air outlet valve is in use, the first rotating shaft is vertically arranged.

[0008] In some embodiments, the locking device includes a rotating plate and a locking assembly, the rotating plate is fixedly connected to the first rotating shaft, the rotating plate has a first positioning groove and a second positioning groove, the locking assembly includes a locking rod, the locking rod can be extended and retracted to drive the locking end of the locking rod in and out of the first positioning groove or the second positioning groove, and when the first cover plate and the second cover plate are in the flat non-return state, the locking end of the locking rod enters the first positioning groove, and when the first cover plate and the second cover plate are in the flip flow state, the locking end of the locking rod enters the second positioning groove.

[0009] In some embodiments, when projected in the axial direction of the first rotating shaft, the central angle formed by the groove centers of the first positioning groove and the second positioning groove and the axis center of the first rotating shaft is a, 91°≥a>90°; and / or, the rotating plate is located between the transmission gear disc and the first transmission gear.

[0010] In some embodiments, the locking assembly also includes a mounting seat, a guide groove is formed on the mounting seat, the locking rod is assembled in the guide groove, a spring is assembled in the guide groove, and the spring is sleeved on the radial outer side of the locking rod, and the spring can apply force to the locking rod along the axial direction of the locking rod to drive the locking end of the locking rod into the first positioning groove or the second positioning groove.

[0011] In some embodiments, projected in the axial direction of the first rotating shaft, the radial outer wall of the rotating plate between the first positioning groove and the second positioning groove is an intermediate outer wall, and the intermediate outer wall is an arc surface, and the locking end of the locking rod can slide and abut against the intermediate outer wall; and / or, the locking rod also has an end opposite to the locking end, and the locking device also includes a magnetic attraction device, which can be controlled to generate a magnetic attraction force to adsorb the end of the locking rod.

[0012] In some embodiments, projected in the axial direction of the first rotating shaft, the middle outer wall is on a first circle, and the rotating plate also has a first end outer wall on the side of the first positioning groove away from the middle outer wall, and a second end outer wall on the side of the second positioning groove away from the middle outer wall. The first end outer wall and the second end outer wall are on a second circle, the first circle is concentric with the second circle, and the radius of the first circle is smaller than the radius of the second circle.

[0013] In some embodiments, the air outlet valve further includes an in-position detection switch, and the in-position detection switch is used to detect the status of the first cover plate and the second cover plate.

[0014] The present invention also provides a ventilation fan, comprising a wind tube and a fan in the wind tube, wherein the above-mentioned air outlet valve is assembled on the air outlet side of the fan, and the wind tube and the air valve cylinder are the same component.

[0015] The air outlet valve and ventilation fan provided by the present invention have the following beneficial effects:

[0016] The state switching of the first cover plate and the second cover plate is driven by the driving device, that is, the active opening and closing control of the first cover plate and the second cover plate is realized. At the same time, the first cover plate and the second cover plate in the flat non-return state or the flip flow state are actively and purely mechanically locked by the locking device, and the opening and closing control of the cover plate is no longer dependent on the wind pressure and deadweight of the fan. This can effectively overcome the technical deficiencies in the prior art that the cover plate needs the wind pressure of the fan to resist the deadweight of the cover plate, which causes energy waste, and the unreliable opening or closing of the air valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the embodiments or the description of the prior art. The drawings described below are merely exemplary. Those skilled in the art can, without inventive effort, derive other implementation drawings based on the provided drawings.

[0018] Figure 1 It is a front view of an air outlet valve in the prior art;

[0019] Figure 2 yes Figure 1 A side view of the air outlet valve;

[0020] Figure 3 1 is a front view of the air outlet valve in an embodiment of the present invention, in which the first cover plate and the second cover plate are in a flat non-return state;

[0021] Figure 4 yes Figure 3 Schematic diagram of the partial structure of the air outlet valve (partial section);

[0022] Figure 5 yes Figure 4 A local enlarged view of point A in FIG;

[0023] Figure 6 yes Figure 3 Side view of the air outlet valve (partial, omitting the protective cover);

[0024] Figure 7 yes Figure 3 A top view (perspective) of the local structure;

[0025] Figure 8 is a top view of the rotating plate in one embodiment of the present invention (i.e., an axial projection along the first rotation axis);

[0026] Figure 9 yes Figure 8 A side view of the rotating plate in FIG;

[0027] Figure 10 yes Figure 7 Schematic diagram of the internal structure of the card position component;

[0028] Figure 11 is a structural schematic diagram of a latch assembly in another embodiment of the present invention;

[0029] Figure 12 It is a side view (partially cut away) of the ventilation fan in the embodiment of the present invention.

[0030] The accompanying drawings are:

[0031] 1. Air valve cylinder; 21. First cover plate; 22. First rotating shaft; 221. First transmission gear; 222. Transmission gear disc; 31. Second cover plate; 32. Second rotating shaft; 321. Second transmission gear; 41. Rotary motor; 42. Drive gear; 43. Motor controller; 51. Rotating plate; 511. First positioning groove; 512. Second positioning groove; 513. Detection rod; 52. Positioning assembly; 521. Positioning rod; 522. Mounting seat; 5221. Guide groove; 523. Spring; 53. Magnetic device; 6. In-position detection switch; 7. Protective cover; 100. Air duct; 101. Fan. DETAILED DESCRIPTION

[0032] The following will be combined with the accompanying 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 embodiments described 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 in no way 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 making creative efforts are within the scope of protection of the present invention.

[0033] In the description of the present invention, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "horizontal, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the accompanying 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 device or element 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 outline of each component itself.

[0034] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. 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 figures. For example, if the device in the 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° or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0035] 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. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0036] See also Figures 1 to 12 As shown, according to an embodiment of the present invention, an air outlet valve is provided, including an air valve cylinder 1, and a first cover plate assembly (not labeled in the figure) and a second cover plate assembly (not labeled in the figure) are provided in the air outlet (not labeled in the figure) of the air valve cylinder 1, the first cover plate assembly includes a first cover plate 21, and the second cover plate assembly includes a second cover plate 31, the first cover plate 21 and the second cover plate 31 have a flat check state for blocking the air outlet and a flip flow state for passing through the air outlet, the air outlet valve also includes a driving device (not labeled in the figure) and a locking device (not labeled in the figure), the driving device is used to drive the first cover plate 21 and the second cover plate 31 to rotate synchronously to realize the switching of the first cover plate 21 and the second cover plate 31 between the flat check state and the flip flow state, and the locking device is used to lock the first cover plate 21 and the second cover plate 31 in the flat check state or the flip flow state. It can be understood that the aforementioned flat check state, that is, the end faces of the first cover plate 21 and the second cover plate 31 are on the same plane, thereby forming a flat state of the two cover plates and then forming a comprehensive blockage for the aforementioned air outlet, preventing the air flow from the external environment from flowing back (that is, return air) to the target space (such as a livestock shed), and the aforementioned flip flow state, that is, the first cover plate 21 and the second cover plate 31 are controlled to flip around their respective rotation axes at a certain angle, so that the air flow can be discharged through the air outlet. The specific size of the aforementioned flipping angle can be reasonably selected according to actual needs.

[0037] In this technical solution, the state switching of the first cover plate 21 and the second cover plate 31 is driven by a driving device, that is, the active opening and closing control of the first cover plate 21 and the second cover plate 31 is realized. At the same time, the first cover plate 21 and the second cover plate 31 in the flat non-return state or the flip flow state are actively locked purely mechanically by the locking device, and the opening and closing control of the cover plate is no longer dependent on the wind pressure and deadweight of the fan. This can effectively overcome the technical deficiencies in the prior art that the cover plate needs the wind pressure of the fan to resist the deadweight of the cover plate, which causes energy waste and unreliable opening or closing of the air valve. It can be understood that the aforementioned driving device only operates when the first cover plate 21 and the second cover plate 31 need to switch states. Compared with the technical solution in the prior art that uses wind pressure to resist the deadweight of the cover plate during fan operation, it is more energy-saving and environmentally friendly.

[0038] In some embodiments, the first cover assembly further includes a first rotating shaft 22 fixedly connected to the first cover 21, and the second cover assembly further includes a second rotating shaft 32 fixedly connected to the second cover 31, and the first end of the first rotating shaft 22 is fixedly connected to the first end of the second rotating shaft 32 (i.e. Figure 3 The bottom end of the position shown) is pivotally connected to the air valve cylinder 1, and the second end of the first rotating shaft 22 (that is, Figure 3 A first transmission gear 221 is provided on the top of the shaft (in the direction shown), and a second transmission gear 321 is provided on the second end of the second rotating shaft 32. The first transmission gear 221 is engaged with the second transmission gear 321. The driving device includes a rotary motor 41, and the rotary motor 41 drives one of the first rotating shaft 22 and the second rotating shaft 32 to rotate.

[0039] In this technical solution, by meshing the first transmission gear 221 and the second transmission gear 321, the first cover plate 21 and the second cover plate 31 can be synchronously rotated and driven by driving one of the first rotating shaft 22 or the second rotating shaft 32 to rotate, thereby realizing reliable switching of the first cover plate 21 and the second cover plate 31 between the flat non-return state and the flip flow state. The structural design is simple, and there is no need to set up a separate drive device for each cover plate, which can reduce the assembly space and the design cost.

[0040] In some embodiments, see Figure 5 As shown, a transmission toothed disc 222 is further provided on the second end of the first rotating shaft 22, and the first transmission gear 221 is located between the outer cylinder wall of the air valve cylinder 1 and the transmission toothed disc 222. The rotating shaft of the rotary motor 41 is arranged parallel to the first rotating shaft 22 and spaced apart. The rotary motor 41 is assembled on the outer cylinder wall of the air valve cylinder 1, and the shaft extension end of the rotary motor 41 faces away from the outer cylinder wall of the air valve cylinder 1. The rotating shaft of the rotary motor 41 is meshed with the transmission toothed disc 222. In order to increase the rotational torque of the rotary motor 41 on the rotating shaft (the aforementioned first rotating shaft 22 or the second rotating shaft 32), the aforementioned The outer diameter of the transmission gear disc 222 is larger than the first transmission gear 221 and the second transmission gear 321, and is also larger than the outer diameter of the rotating shaft of the rotary motor 41. It can be understood that the outer diameter of the casing of the aforementioned rotary motor 41 is larger than the outer diameter of the rotating shaft. In this technical solution, the shaft extension end of the rotary motor 41 is turned away from the outer cylinder wall of the air valve cylinder 1 so that the rotating shaft of the rotary motor 41 can engage with the larger transmission gear disc 222. At the same time, the larger casing of the rotary motor 41 is placed on the same side as the first transmission gear 221 and the second transmission gear 321 with smaller outer diameters, which can achieve more reasonable utilization of space and a more compact structure.

[0041] In some embodiments, when the air outlet valve is in use, the first rotating shaft 22 is vertically arranged, that is, the rotation axis of the first rotating shaft 22 is on a vertical line. In this way, the energy loss in overcoming the weight of the cover plate when the first cover plate 21 and the second cover plate 31 are switched from the flat check state to the flip flow state can be further reduced.

[0042] In a specific embodiment, the locking device includes a rotating plate 51 and a locking assembly 52, wherein the rotating plate 51 is fixedly sleeved with the first rotating shaft 22 (for example, connected by a key), see Figure 8 As shown, the rotating plate 51 has a first positioning groove 511 and a second positioning groove 512, and the locking component 52 includes a locking rod 521. The locking rod 521 can be extended to drive the locking end of the locking rod 521 (that is, the end of the locking rod 521 facing the rotating plate 51) to enter and exit the first positioning groove 511 or the second positioning groove 512, and when the first cover plate 21 and the second cover plate 31 are in the flat non-return state, the locking end of the locking rod 521 enters the first positioning groove 511, and when the first cover plate 21 and the second cover plate 31 are in the flip flow state, the locking end of the locking rod 521 enters the second positioning groove 512. For details, see Figure 8 As shown, the first positioning groove 511 and the second positioning groove 512 are respectively open grooves that open radially outward along the rotating plate 51 , and the aforementioned positioning rod 521 is extended and retracted along the radial direction of the rotating plate 51 .

[0043] In this technical solution, the first positioning groove 511 and the second positioning groove 512 are provided on the radial outer wall of the rotating plate 51 and a retractable locking rod 521 is configured. In this way, the first rotating shaft 22 can be locked when the first cover plate 21 and the second cover plate 31 are in the aforementioned flat non-return state or flip flow state, thereby ensuring that the two cover plates are stably in the aforementioned flat non-return state or flip flow state. The structure is simple and reasonable.

[0044] In a preferred embodiment, the rotating plate 51 is located between the transmission gear disc 222 and the first transmission gear 221, so that the height of the transmission gear disc 222 is more matched with the height of the driving gear 42 on the rotating shaft of the rotary motor 41, and the spatial layout is more reasonable.

[0045] In some embodiments, when projected in the axial direction of the first rotating shaft 22 , the central angle formed by the center of each of the first positioning groove 511 and the second positioning groove 512 and the axis of the first rotating shaft 22 is a, and 91°≥a>90°.

[0046] In this technical solution, the circular angle a formed between the first positioning groove 511 and the second positioning groove 512 is limited to be slightly larger than 90°, so that the first cover plate 21 and the second cover plate 31 can be slightly tilted toward the area between the two rotating shafts when they are in the flip flow state, and it is best to make the two touch each other at the edge of the cover plate away from the rotating shaft, so that the state of the cover plate is more stable and reliable, especially when the air outlet valve is in the top air outlet application scenario, the edges of the first cover plate 21 and the second cover plate 31 on one side away from their respective rotating shafts touch each other in the center, which can greatly prevent the occurrence of state instability due to the self-weight of the first cover plate 21 and the second cover plate 31.

[0047] In some embodiments, the locking assembly 52 also includes a mounting seat 522, which is fixed on the outer cylinder wall of the air valve cylinder 1, and a guide groove 5221 is formed on the mounting seat 522, and the locking rod 521 is assembled in the guide groove 5221, and a spring 523 is assembled in the guide groove 5221, and the spring 523 is mounted on the radial outer side of the locking rod 521, and the spring 523 can apply force to the locking rod 521 along the axial direction of the locking rod 521 to drive the locking end of the locking rod 521 into the first positioning groove 511 or the second positioning groove 512.

[0048] In this technical solution, a spring 523 is arranged between the locking rod 521 and the guide groove 5221, and the elastic recovery effect of the spring 523 is utilized to realize the sliding interference between the locking end of the locking rod 521 and the radial outer wall surface of the rotating plate 51. At the same time, the locking end of the locking rod 521 and the accommodation of the first positioning groove 511 and the second positioning groove 512 are utilized to realize the state locking of the rotating plate 51 and then the aforementioned first cover plate 21 and the second cover plate 31, and the structure is simple.

[0049] In some embodiments, in the axial projection of the first rotating shaft 22, the radial outer wall of the rotating plate 51 between the first positioning groove 511 and the second positioning groove 512 is an intermediate outer wall, and the intermediate outer wall is an arc surface. The locking end of the locking rod 521 can slide and abut against the intermediate outer wall. Through the design of the arc surface, the contact sliding between the locking rod 521 and the rotating plate 51 can be guided to ensure smooth state switching.

[0050] The locking rod 521 also has an end opposite to the locking end (that is, the end of the locking rod 521 away from the rotating plate 51), and the locking device also includes a magnetic device 53, which can be controlled to generate a magnetic force to adsorb the end of the locking rod 521. Specifically, the aforementioned magnetic device 53 can be an electromagnet, which generates a magnetic force when it is powered on and loses the electromagnetic force when it is powered off.

[0051] In this technical solution, a magnetic attraction device 53 is provided at the end position of the locking rod 521, which can realize the axial force on the locking rod 521 by controlling whether the magnetic attraction device 53 is energized. Then, when the first cover plate 21 and the second cover plate 31 need to switch states, the magnetic attraction device 53 can be controlled to be energized to generate a magnetic attraction force to adsorb the end of the locking rod 521, thereby ensuring that the locking end of the locking rod 521 can be quickly disengaged from the aforementioned first positioning groove 511 or the second positioning groove 512, ensuring fast and smooth switching of states.

[0052] In some embodiments, see Figure 8 As shown, in the axial projection of the first rotating shaft 22, the middle outer side wall is in the first circle (as shown in FIG. Figure 8 The rotating plate 51 further comprises a first end outer wall located on the side of the first positioning groove 511 away from the middle outer wall, and a second end outer wall located on the side of the second positioning groove 512 away from the middle outer wall. The first end outer wall and the second end outer wall are located on the second circle (as shown in FIG. Figure 8 On the circle where the arc with a radius of R+3mm marked in the middle is located), the first circle is concentric with the second circle and the radius of the first circle is smaller than the radius of the second circle. It can be understood that the aforementioned first positioning groove 511 and the second positioning groove 512 are respectively transitionally connected to the aforementioned middle outer wall connection position circular ring.

[0053] In this technical solution, the radius of the aforementioned middle outer wall is smaller than the radius of the aforementioned first end outer wall and the second end outer wall, which can ensure that the locking end of the locking rod 521 can smoothly switch between the first positioning groove 511 and the second positioning groove 512 through the aforementioned middle outer wall.

[0054] In some embodiments, the air outlet valve further includes an in-position detection switch 6, which is used to detect the status of the first cover plate 21 and the second cover plate 31. The in-position detection switch 6 can be a contact switch. Figure 9 A detection rod 513 is provided on the rotating plate 51, and the detection rod 513 rotates synchronously with the first rotating shaft 22. Two in-position detection switches 6 are provided, and the two in-position detection switches 6 are set at a preset angle. One of the in-position detection switches 6 corresponds to the position of the detection rod 513 on the rotating plate 51 in the flat non-return state, and the other in-position detection switch 6 corresponds to the position of the detection rod 513 on the rotating plate 51 in the flip flow state. In this way, the status of the first cover plate 21 and the second cover plate 31 can be monitored in real time to prevent the aforementioned cover plates from not being in the target position. Specifically, for livestock farms, the feedback signal of the aforementioned in-position detection switch 6 can be used to monitor whether the aforementioned air outlet valve is in the target state, which facilitates timely monitoring and maintenance by personnel.

[0055] In a specific embodiment, the aforementioned driving device and locking device are housed in a protective cover 7 to ensure dust and water resistance of the mechanism and improve the reliability of the device.

[0056] According to an embodiment of the present invention, a ventilation fan is also provided, including an air duct 100 and a fan 101 located in the air duct 100. The above-mentioned air outlet valve is assembled on the air outlet side of the fan 101, and the air duct 100 and the air valve cylinder 1 are the same component, that is, the air outlet valve of the present invention is objectively a part of the ventilation fan, and there is no need to set up a corresponding air outlet cylinder separately.

[0057] It is easy for those skilled in the art to understand that, under the premise of no conflict, the advantageous technical features of the above-mentioned methods can be freely combined and superimposed.

[0058] The above description is merely a preferred embodiment of the present invention and is 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 within the scope of protection of the present invention. The above description is merely a preferred embodiment of the present invention. It should be noted that those skilled in the art can make various improvements and variations without departing from the technical principles of the present invention, and such improvements and variations shall also be considered within the scope of protection of the present invention.

Claims

1. An air outlet valve, characterized in that: The invention comprises an air valve cylinder (1), wherein an air outlet of the air valve cylinder (1) is provided with a first cover plate assembly and a second cover plate assembly, wherein the first cover plate assembly comprises a first cover plate (21), and the second cover plate assembly comprises a second cover plate (31), wherein the first cover plate (21) and the second cover plate (31) have a flat non-return state for blocking the air outlet and a flip-through flow state for passing through the air outlet, and further comprises a driving device and a locking device, wherein the driving device is used to drive the first cover plate (21) and the second cover plate (31) to rotate synchronously so as to realize switching of the first cover plate (21) and the second cover plate (31) between the flat non-return state and the flip-through flow state, and the locking device is used to lock the first cover plate (21) and the second cover plate (31) in the flat non-return state or the flip-through flow state.

2. The air outlet valve according to claim 1, characterized in that: The first cover plate assembly further comprises a first rotating shaft (22) fixedly connected to the first cover plate (21), and the second cover plate assembly further comprises a second rotating shaft (32) fixedly connected to the second cover plate (31), a first end of the first rotating shaft (22) and a first end of the second rotating shaft (32) are pivotally connected to the air valve cylinder (1), a first transmission gear (221) is provided on the second end of the first rotating shaft (22), and a second transmission gear (321) is provided on the second end of the second rotating shaft (32), and the first transmission gear (221) is meshed with the second transmission gear (321), and the driving device comprises a rotary motor (41), and the rotary motor (41) drives one of the rotating shaft (22) and the second rotating shaft (32) to rotate.

3. The air outlet valve according to claim 2, characterized in that: A transmission gear disc (222) is further provided on the second end of the first rotating shaft (22), and the first transmission gear (221) is located between the outer cylinder wall of the air valve cylinder (1) and the transmission gear disc (222). The rotating shaft of the rotary motor (41) is arranged parallel to and spaced apart from the first rotating shaft (22). The rotary motor (41) is assembled on the outer cylinder wall of the air valve cylinder (1), and the shaft extension end of the rotary motor (41) faces away from the outer cylinder wall of the air valve cylinder (1). The rotating shaft of the rotary motor (41) is meshedly connected with the transmission gear disc (222).

4. The air outlet valve according to claim 3, characterized in that: When the air outlet valve is in use, the first rotating shaft (22) is arranged vertically.

5. The air outlet valve according to claim 3, characterized in that: The locking device comprises a rotating plate (51) and a locking assembly (52), wherein the rotating plate (51) is fixedly sleeved with the first rotating shaft (22), and the rotating plate (51) is provided with a first positioning groove (511) and a second positioning groove (512), and the locking assembly (52) comprises a locking rod (521), wherein the locking rod (521) is capable of being telescopic to drive the locking end of the locking rod (521) to enter and exit the first positioning groove (511) or the second positioning groove (512), and when the first cover plate (21) and the second cover plate (31) are in the flat non-return state, the locking end of the locking rod (521) enters the first positioning groove (511), and when the first cover plate (21) and the second cover plate (31) are in the flip flow state, the locking end of the locking rod (521) enters the second positioning groove (512).

6. The air outlet valve according to claim 5, characterized in that: Projected in the axial direction of the first rotating shaft (22), the center angle formed by the center of each of the first positioning groove (511) and the second positioning groove (512) and the axis of the first rotating shaft (22) is a, 91°≥a>90°; and / or the rotating plate (51) is located between the transmission toothed disc (222) and the first transmission gear (221).

7. The air outlet valve according to claim 5, characterized in that: The locking assembly (52) further includes a mounting seat (522), a guide groove (5221) is formed on the mounting seat (522), the locking rod (521) is assembled in the guide groove (5221), a spring (523) is assembled in the guide groove (5221), and the spring (523) is sleeved on the radial outer side of the locking rod (521), and the spring (523) can apply force to the locking rod (521) along the axial direction of the locking rod (521) to drive the locking end of the locking rod (521) to enter the first positioning groove (511) or the second positioning groove (512).

8. The air outlet valve according to claim 7, characterized in that: Projected in the axial direction of the first rotating shaft (22), the radial outer wall of the rotating plate (51) between the first positioning groove (511) and the second positioning groove (512) is an intermediate outer wall, and the intermediate outer wall is an arc surface, and the locking end of the locking rod (521) can be slidably abutted against the intermediate outer wall; and / or, the locking rod (521) also has an end opposite to the locking end, and the locking device also includes a magnetic attraction device (53), and the magnetic attraction device (53) can be controlled to generate a magnetic attraction force to adsorb the end of the locking rod (521).

9. The air outlet valve according to claim 8, characterized in that: Projected in the axial direction of the first rotating shaft (22), the middle outer wall is on a first circle, and the rotating plate (51) further comprises a first end outer wall located on a side of the first positioning groove (511) away from the middle outer wall, and a second end outer wall located on a side of the second positioning groove (512) away from the middle outer wall, the first end outer wall and the second end outer wall are on a second circle, the first circle is concentric with the second circle, and the radius of the first circle is smaller than the radius of the second circle.

10. The air outlet valve according to claim 5, characterized in that: It also includes an on-site detection switch (6), which is used to detect the status of the first cover plate (21) and the second cover plate (31).

11. A ventilation fan, characterized in that: The invention comprises an air duct (100) and a fan (101) in the air duct (100), wherein the air outlet valve according to any one of claims 1 to 10 is assembled on the air outlet side of the fan (101), and the air duct (100) and the air valve cylinder (1) are the same component.

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