A damper position feedback mechanism, a damper, and an air cycle machine

Abstract

The utility model provides a position feedback mechanism of flap, flap and air circulating machine, wherein, position feedback mechanism includes the lever assembly, and the lever assembly includes the lever, elastic part and trigger switch, and the lever is used for rotatably setting on the movement track of the rotator of flap, and the rotator is used for rotating the valve plate of flap to open or close the valve port of flap when rotating, the lever is used for being pushed by the rotator and rotating when the rotator rotates to the preset angle position, to release the trigger part of trigger switch, makes trigger switch be triggered, trigger switch is used for installing on the fixed structure of flap, to receive the feedback of trigger and open and close angle of flap when rotator is in the preset angle position, elastic part is used for pushing the lever reset to initial position, to press the trigger part of trigger switch. According to the utility model, the impact force that trigger switch can be reduced, reduces the risk of damage of trigger switch by impact.

Description

Technical Field

[0001] This utility model belongs to the field of valve technology, specifically relating to a valve position feedback mechanism, a valve, and an air circulator. Background Technology

[0002] With the continuous development of air conditioning technology, the application of air conditioning has expanded unprecedentedly, including in trains, ships, and aircraft. Unlike the conventional air conditioning system's "refrigerant + four-way valve" cooling scheme, airborne air conditioning uses an "air circulator + valve" cooling scheme to achieve air conditioning; therefore, airborne air conditioning is also known as an environmental control system. As the core component for temperature control in the environmental control system, the valve's opening and closing angle must be able to provide real-time feedback to the cockpit.

[0003] Existing related technologies disclose a valve, which includes a rotating component, a valve plate, and a trigger switch. The rotating component can be the valve's worm gear. The rotating component rotates to drive the valve plate, opening or closing the valve's valve port. When the rotating component rotates to a preset angle position, such as the valve port open or closed position, it directly impacts the triggering part of the trigger switch, thus triggering the switch. The trigger switch provides feedback on the valve's opening / closing angle when the rotating component is at the preset angle position. Specifically, when the preset angle position is the valve port open position, the trigger switch provides feedback on the valve's open state; when the preset angle position is the valve port closed position, the trigger switch provides feedback on the valve's closed state. Upon triggering, the trigger switch generates a signal reflecting the valve's opening / closing angle. This signal can be fed back to the cockpit for the driver's reference, serving as feedback for the driver's output control commands, allowing the driver to understand the actual valve's opening / closing status.

[0004] The trigger switch is activated by direct impact from the rotating part, which is prone to damage, so this issue needs to be addressed. Utility Model Content

[0005] Therefore, this utility model provides a position feedback mechanism for a valve, a valve, and an air circulator, which can solve the technical problem in the prior art where the trigger switch is triggered by direct impact from the rotating part, which is prone to damage.

[0006] To solve the above problems, this utility model provides a position feedback mechanism for a valve, which includes a lever assembly. The lever assembly includes a lever, an elastic element, and a trigger switch. The lever is rotatably mounted on the movement trajectory of the rotating part of the valve. The rotating part is used to drive the valve plate of the valve to rotate when rotating, so as to open or close the valve port of the valve. The lever is used to rotate when the rotating member rotates to a preset angle position, thereby releasing the trigger part of the trigger switch and triggering the trigger switch; the trigger switch is used to be installed on the fixed structure of the valve, so as to provide feedback on the opening and closing angle of the valve when the rotating member is at the preset angle position; the elastic member is used to push the lever back to the initial position to press the trigger part of the trigger switch.

[0007] In some embodiments, the trigger switch is a micro switch, and the triggering part is a retractable trigger button on the micro switch; And / or, the rotating component is a worm gear.

[0008] In some embodiments, one end of the elastic element is connected to a lever, and the other end of the elastic element is used to connect to a fixed structure on the valve.

[0009] In some embodiments, the position feedback mechanism of the valve further includes a base on which the lever is rotatably mounted for connection to a fixed structure on the valve via the base.

[0010] In some embodiments, the base is provided with opposing first and second support walls, and a rotation space is formed between the first and second support walls for the lever to rotate. The first support wall is provided with a through hole, the second support wall is provided with a threaded hole, and the lever is provided with a shaft hole. The lever assembly further includes a bolt, the bolt's thread passing sequentially through the through hole and the shaft hole, and threadedly connected within the threaded hole; wherein the lever is rotatably mounted on the base via the thread.

[0011] In some embodiments, the screw has a smooth section; Wherein, the screw is rotatably engaged with the shaft hole through the smooth rod section; and / or, the screw passes through the through hole through the smooth rod section.

[0012] In some embodiments, the lever is provided with a widened portion, and the lever is rotated by the rotating member through the widened portion.

[0013] In some embodiments, there are two lever assemblies, namely a first lever assembly and a second lever assembly. The lever of the first lever assembly is rotatably mounted on the movement trajectory of one end of the rotating part of the valve; and the lever of the second lever assembly is rotatably mounted on the movement trajectory of the other end of the rotating part of the valve.

[0014] In some embodiments, when the position feedback mechanism of the valve further includes a base, and the lever is rotatably mounted on the base for connection to a fixed structure on the valve via the base, The levers of both the first lever assembly and the second lever assembly are mounted on the same base.

[0015] This utility model also provides a gate, which includes the position feedback mechanism described in any one of the above descriptions.

[0016] In some embodiments, the rotating member has a protrusion, and the rotating member pushes the lever to rotate through the protrusion; And / or, when there are two lever assemblies, namely a first lever assembly and a second lever assembly, wherein the lever of the first lever assembly is rotatably mounted on the movement trajectory of one end of the rotating member of the valve; and the lever of the second lever assembly is rotatably mounted on the movement trajectory of the other end of the rotating member of the valve, the rotating member is a worm gear of the valve, the worm gear is C-shaped to form one end of the rotating member and the other end of the rotating member in the circumferential direction.

[0017] This utility model also provides an air circulator, which includes the position feedback mechanism described in any one of the above descriptions; or includes the valve described above.

[0018] The position feedback mechanism for a valve, the valve itself, and the air circulator provided by this utility model have the following beneficial effects: 1. Compared with the existing technology where the trigger switch is triggered by direct impact from the rotating part, the trigger switch in this utility model is not impacted when triggered. Although the trigger switch is also impacted by the lever when resetting, the force of the lever impacting the trigger switch is provided by the elastic element, which has a buffering function, so that the lever can impact the trigger switch with a smaller force, thereby reducing the impact force on the trigger switch and reducing the risk of damage to the trigger switch due to impact.

[0019] 2. The lever assembly in this utility model has a simple structure, high reliability, and high precision, and can solve problems such as untimely feedback of valve opening signal or insufficient precision. Attached Figure Description

[0020] To more clearly illustrate the embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. The drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0021] Figure 1This is a schematic diagram of the structure of a valve provided in one embodiment of the present invention; Figure 2 This is a partial structural diagram of a door provided in one embodiment of the present invention; Figure 3 This is a schematic diagram of a lever mounted on a base according to an embodiment of the present invention; Figure 4 yes Figure 3 Exploded view of the structure.

[0022] The attached figures are labeled as follows: 1. Rotating component; 2. Lever assembly; 4. Base; 5. Gearbox of reduction mechanism; 6. Power mechanism; 7. Gear reduction mechanism; 8. Worm gear reduction mechanism; 9. Valve stem; 10. Pointer; 11. Valve plate; 1a. Worm gear; 2a. First lever assembly; 2b. Second lever assembly; 4a. First support wall; 4b. Second support wall; 21. Lever; 22. Switch; 23. Elastic element; 24. Bolt; 41. Fixing hole; 42. Limiting groove; 43. Through hole; 44. Threaded hole; 100. Valve port; 101. Protrusion; 220. Trigger part; 211. Shaft hole; 212. Widened part; 241. Smooth rod section; 242. Threaded section. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present utility model or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0024] In the description of this utility model, it should be understood that the directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner and outer contours of each component itself.

[0025] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0026] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this utility model.

[0027] See also Figure 1-4 As shown, according to an embodiment of the present invention, a position feedback mechanism for a valve is provided, which includes a lever assembly 2. The lever assembly 2 includes a lever 21, an elastic element 23, and a trigger switch 22. The trigger switch 22 can be a micro switch, etc. The lever 21 is rotatably mounted on the movement trajectory of the rotating component 1 of the valve. The rotating component 1 can be a worm gear 1a on the valve, etc. The rotating component 1 is used to drive the valve plate 11 of the valve to rotate when rotating, so as to open or close the valve port 100 of the valve.

[0028] The aforementioned lever 21 is used to rotate when the rotating member 1 rotates to a preset angle position, thereby releasing the trigger part 220 of the trigger switch 22 and triggering the trigger switch 22. The trigger switch 22 is used to be installed on the fixed structure of the valve, which can be a fixed bracket for the valve. The trigger switch 22 is used to receive feedback on the opening and closing angle of the valve when the rotating member 1 is at the preset angle position. Specifically, when the preset angle position is the valve port open position, the trigger switch 22 receives feedback on the open state of the valve; when the preset angle position is the valve port closed position, the trigger switch 22 receives feedback on the closed state of the valve. The specific implementation method of the trigger switch 22 receiving feedback on the opening and closing angle of the valve when the rotating member 1 is at the preset angle position is existing technology and will not be described in detail here.

[0029] The aforementioned elastic element 23 is used to push the lever 21 back to its initial position to press the trigger part 220 of the trigger switch 22.

[0030] In the above example, the trigger switch 22 of this invention is triggered by releasing the trigger part 220, and during reset, the elastic element 23 pushes the lever 21 to press the trigger switch 22. Compared with the prior art where the trigger switch 22 is triggered by direct impact from the rotating part 1, the trigger switch 22 of this invention is not impacted when triggered. Although the trigger switch 22 is also impacted by the lever 21 during reset, the force of the lever 21 impacting the trigger switch 22 is provided by the elastic element 23, which has a buffering function, allowing the lever 21 to impact the trigger switch 22 with a smaller force, thereby reducing the impact force on the trigger switch 22 and lowering the risk of damage to the trigger switch 22 due to impact.

[0031] To achieve the function of the aforementioned trigger switch 22, in a specific application example, the trigger switch 22 can be a micro switch, and the trigger part 220 can be a retractable trigger button on the micro switch. The function of the micro switch is to convert the mechanical signal of the valve plate 11 opening into an electrical signal and feed it back to the cockpit.

[0032] like Figure 1 and Figure 2 As shown, the rotating component 1 can be the worm gear 1a of the valve. The axle of the worm gear 1a is connected to the valve plate 11 through the valve stem 9. When the worm gear 1a rotates, it drives the valve plate 11 to rotate together through the valve stem 9, so as to open or close the valve port 100 of the valve.

[0033] In some embodiments, one end of the aforementioned elastic member 23 is connected to the lever 21, and the other end of the elastic member 23 is used to connect to the fixing structure on the valve, thus enabling the installation of the aforementioned elastic member 23. The fixing structure on the valve can be a valve fixing bracket.

[0034] The aforementioned elastic element 23 can be a spring or flexible plastic, etc. Figure 2 As shown, when the elastic element 23 is a spring, one end of the elastic element 23 can be connected to the lever 21 by hooking. Similarly, the other end of the elastic element 23 can also be connected to the fixed structure on the valve by hooking.

[0035] In some implementations, such as Figure 2-4 As shown, the aforementioned position feedback mechanism of the valve may further include a base 4, on which the aforementioned lever 21 is rotatably mounted to connect to a fixed structure on the valve via the base 4. This fixed structure may be a gearbox 5 of the valve's reduction mechanism.

[0036] In the above example, the lever 21 can be rotatably mounted on the base 4 in advance, and then connected to the fixed structure on the valve through the base 4, which can improve the efficiency of assembling the lever 21 onto the valve.

[0037] In order to rotatably mount the lever 21 onto the base 4, in some embodiments, such as Figure 3-4 As shown, the aforementioned base 4 may be provided with opposing first support walls 4a and second support walls 4b. A rotational space is formed between the first support wall 4a and the second support wall 4b for the aforementioned lever 21 to rotate. The first support wall 4a is provided with a through hole 43, the second support wall 4b is provided with a threaded hole 44, and the lever 21 is provided with a shaft hole 211. The aforementioned lever assembly 2 also includes a bolt 24, the screw of which passes through the through hole 43 and the shaft hole 211 in sequence and is threaded into the threaded hole 44. The lever 21 is rotatably mounted on the base 4 by means of a screw.

[0038] In the above example, bolt 24 is a conventional and universal component. By using bolt 24 as the pivot of lever 21, it has the advantages of saving costs and also facilitates the disassembly and assembly of lever 21.

[0039] In some implementations, such as Figure 4 As shown, the aforementioned screw has a smooth section 241. The screw rotates with the shaft hole 211 through the smooth section 241 to reduce the frictional resistance between the screw and the shaft hole 211, thereby facilitating the rotation of the lever 21.

[0040] In some embodiments, the screw also passes through the through hole 43 via the smooth rod section 241 to reduce the frictional resistance between the screw and the through hole 43 and facilitate the assembly of the screw and the through hole 43.

[0041] like Figure 3-4 As shown, a limiting groove 42 is provided on the aforementioned base 4 between the first support wall 4a and the second support wall 4b. This limiting groove 42 is used to limit the rotation angle of the lever 21. The lever 21 rotates between a first extreme position and a second extreme position. When the rotating member 1 pushes the lever 21 to separate from the trigger part 220 of the switch 22, the lever 21 is pushed to rotate to the first extreme position and abuts against one end of the limiting groove 42, thus being stopped and limited by that end. Similarly, when the lever 21 is pushed back to its initial position by the elastic member 23, the lever 21 abuts against the other end of the limiting groove 42, thus being stopped and limited by that end.

[0042] The aforementioned base 4 and lever 21 can adopt a lightweight design, such as using lightweight materials like aluminum alloy and titanium alloy, to meet the usage requirements while keeping the weight as light as possible, thus meeting the lightweight design requirements of aerospace products.

[0043] In some implementations, such as Figure 3-4As shown, the aforementioned lever 21 may be provided with a widened portion 212. The lever 21 is pushed by the rotating member 1 to rotate through the widened portion 212, so that the rotating member 1 will not separate from the lever 21 when pushing the lever 21 to rotate, thereby improving the accuracy and reliability of the position feedback mechanism of this utility model.

[0044] The assembly process of lever 21 and base 4 is as follows: Figure 3-4 As shown, the shaft hole 211 at the bottom of the lever 21 is aligned with the through hole 43 on the first support wall 4a and the threaded hole 44 on the second support wall 4b. The bolt 24 is screwed in from the outside of the base 4. After assembly, the lever 21 can rotate around the screw of the bolt 24 within a certain angle range. For ease of assembly, a rotation angle of 60° is recommended. The aforementioned first support wall 4a is located on the outside of the base 4 relative to the second support wall 4b. The bolt 24 is inserted from the through hole 43 on the outer side of the first support wall 4a, passes through the shaft hole 211 at the bottom of the lever 21, and is screwed into the threaded hole 44 on the second support wall 4b. After tightening, the smooth section 241 on the screw of the bolt 24 is rotatably engaged with the shaft hole 211 on the lever 21, and the threaded section 242 of the screw is threadedly connected to the threaded hole 44 on the second support wall 4b.

[0045] In some implementations, such as Figure 2 As shown, there can be two lever assemblies 2, namely a first lever assembly 2a and a second lever assembly 2b. The lever of the first lever assembly 2a is rotatably mounted on the movement trajectory of one end of the rotating member 1 of the valve. And the lever of the second lever assembly 2b is rotatably mounted on the movement trajectory of the other end of the rotating member 1 of the valve.

[0046] In the above example, the first lever assembly 2a can be used to provide feedback on the open state of the valve, and the second lever assembly 2b can be used to provide feedback on the closed state of the valve. In this way, the first lever assembly 2a and the second lever assembly 2b can work together to provide feedback on the open and closed states of the valve.

[0047] Specifically, in implementation, the lever of the first lever assembly 2a can rotate when the rotating member 1 rotates to the open valve position, pushed by one end of the rotating member 1 to release the trigger part 220 of the trigger switch 22 of the first lever assembly 2a, thereby triggering the trigger switch of the first lever assembly 2a. The trigger switch of the first lever assembly 2a is used to trigger the feedback valve to the maximum opening angle state, i.e., the fully open state. The elastic member of the first lever assembly 2a is used to push the lever of the first lever assembly 2a back to the initial position to press the trigger part of the trigger switch of the first lever assembly 2a.

[0048] Similarly, the lever of the second lever assembly 2b can be rotated by the other end of the rotating member 1 when the rotating member 1 rotates to the closed valve port 100 position, thereby releasing the trigger part of the trigger switch of the second lever assembly 2b and triggering the trigger switch of the second lever assembly 2b. The trigger switch of the second lever assembly 2b is used when the opening and closing angle of the triggered feedback valve is 0, i.e., the closed state. The elastic member of the second lever assembly 2b is used to push the lever of the second lever assembly 2b back to the initial position to press the trigger part of the trigger switch of the second lever assembly 2b.

[0049] In some embodiments, when the position feedback mechanism of the valve further includes a base 4, and the lever 21 is rotatably mounted on the base 4 to be connected to a fixed structure on the valve via the base 4, such as... Figure 3 As shown, the levers of the first lever assembly 2a and the second lever assembly 2b can be mounted on the same base 4 to save the number of bases 4 and reduce costs.

[0050] In a specific application example, such as Figure 3-4 As shown, the aforementioned base 4 can adopt a "C"-shaped structure, which can improve the structural strength of the base 4. The base 4 is fixed to the gearbox 5 of the valve's reduction mechanism through the middle of the "C"-shaped structure. The middle of the "C"-shaped structure is provided with a fixing hole 41 for another bolt to pass through, and the other bolt passes through the fixing hole 41 to fix the base 4 to the gearbox 5 of the valve's reduction mechanism. The upper parts of both sides of the "C"-shaped structure are used to install the levers of both the first lever assembly 2a and the second lever assembly 2b, and the bottom of the "C"-shaped structure is used to press against the gearbox 5 of the valve's reduction mechanism.

[0051] In some embodiments, the present invention also provides a gate, which may include any of the position feedback mechanisms described above.

[0052] In some embodiments, the aforementioned rotating member 1 may be provided with a protrusion 101, through which the rotating member 1 pushes the lever 21 to rotate. This protrusion 101 may also be referred to as a contact in some contexts.

[0053] In some implementations, such as Figure 2As shown, when there are two lever assemblies 2, namely the first lever assembly 2a and the second lever assembly 2b, the lever of the first lever assembly 2a is rotatably set on the movement trajectory of one end of the rotating part 1 of the valve; and the lever of the second lever assembly 2b is rotatably set on the movement trajectory of the other end of the rotating part 1 of the valve, the aforementioned rotating part 1 can be the worm gear 1a of the valve. The worm gear 1a is C-shaped, so that one end of the rotating part 1 and the other end of the rotating part 1 are formed in the circumferential direction. This makes it convenient for the worm gear 1a to push the lever of the first lever assembly 2a through one end and push the lever of the second lever assembly 2b through the other end when rotating.

[0054] In some implementations, such as Figure 1 As shown, the aforementioned valve may include a power mechanism 6 and a reduction mechanism. The power mechanism 6 drives the valve plate 11 to rotate via the reduction mechanism, and the aforementioned rotating component 1 is a component of the reduction mechanism. In a specific application example, the reduction mechanism may include a gear reduction mechanism 7 and a worm gear reduction mechanism 8. The gear reduction mechanism 7 may be a two-stage spur gear reduction mechanism. The reduction mechanism is connected to the output end of the power mechanism 6 via the input end of the gear reduction mechanism 7, and the output end of the gear reduction mechanism 7 is connected to the input end of the worm gear reduction mechanism 8. The reduction mechanism is also connected to the valve plate 11 via the output end of the worm gear reduction mechanism 8. The power mechanism 6 may include a motor, such as a stepper motor, and the output end of the power mechanism 6 is connected to the input end of the gear reduction mechanism 7. The output end of the worm gear reduction mechanism 8 can be connected to the valve plate 11 via the valve stem 9 to drive the valve plate 11 to rotate. The aforementioned rotating component 1 may be the worm wheel 1a of the worm gear reduction mechanism 8.

[0055] The aforementioned speed reduction mechanism functions as follows: after the power mechanism 6, such as a stepper motor, is powered on, it decelerates through the speed reduction mechanism to increase the torque. Only when the torque increases to the design value can it drive the valve plate 11 to rotate, thereby controlling the flow rate.

[0056] like Figure 1 As shown, the aforementioned valve also includes a fixed bracket and a pointer 10. The aforementioned deceleration mechanism and power mechanism are both mounted on this fixed bracket. The pointer 10 can be fixed to the aforementioned valve stem 9, so that it rotates under the drive of the valve stem 9. The pointer 10 serves an indicating function.

[0057] In some implementations, the aforementioned valve can be a temperature control valve. As one of the core components of aircraft air conditioning, the temperature control valve has the following main functions: 1) providing thermal bypass temperature regulation for the ACU; 2) providing turbine outlet de-icing for the ACU; and 3) providing feedback on the valve's fully open and fully closed positions.

[0058] The working principle of the aforementioned valve is as follows: After the stepper motor is powered on, it provides torque. Under the action of the stepper motor torque, the valve plate 11 acts as an actuator to control the flow rate of the medium. The stepper motor, gear reduction mechanism 7, and worm gear reduction mechanism 8 are connected in sequence. After reduction, the worm gear 1a rotates from 0 to 90 degrees, triggering the corresponding switches 22 at 0° and 90° respectively. The switch 22 corresponding to the 0° position, when triggered, indicates the closed state of the valve. The switch 22 corresponding to the 90° position, when triggered, indicates the open state of the valve. The worm gear 1a drives the valve plate 11 to rotate via the valve stem 9, controlling the flow rate of the valve port 100 by changing the flow area of ​​the valve port 100. The pointer 10 on the valve stem 9 also rotates accordingly, indicating the position of the valve plate 11.

[0059] In some embodiments, the present invention also provides an air circulator, which may include any of the above-described position feedback mechanisms; or include the above-described valves.

[0060] For ease of understanding, the overall structure of this utility model will be described below, and its working principle will be explained.

[0061] The lever assembly 2 in this invention is used inside the worm gear cavity of the valve's reduction gearbox. As a core component of the position feedback mechanism, the lever 21 of the lever assembly cooperates with the switch 22 to feed back the position information of the reduction mechanism to the cockpit via an electrical signal. The valve controls the flow of the medium by driving the valve plate 11 through the power mechanism. During operation, the worm gear 1a of the worm gear reduction mechanism 8 drives the valve plate 11 to rotate through the valve rod 9. The rotation of the worm gear 1a is synchronized with the valve rod 9, that is, the rotation angle of the worm gear 1a is equivalent to the opening or closing angle of the valve plate 11. The worm gear 1a can serve as the aforementioned rotating component 1. The worm gear 1a has a C-shaped design, and both ends of the worm gear 1a in the circumferential direction are designed with protrusions 101 as contacts. When the valve is fully open, the reduction mechanism rotates forward, and the circumferential end of the worm gear 1a abuts against the lever of the first lever assembly 2a. The lever of the first lever assembly 2a rotates clockwise under the push of the worm gear 1a, causing the lever 21 to separate from the trigger button of the corresponding switch 22, generating a valve open signal. When the valve is closed, the reduction mechanism rotates in the reverse direction, and the circumferential end of the worm gear 1a abuts against the lever of the second lever assembly 2b. The lever of the second lever assembly 2b rotates under the push of the worm gear 1a, causing the lever 21 to separate from the trigger button of the corresponding switch 22, generating a valve closed signal.

[0062] The pilot controls the aircraft's air conditioning system to open and close the valves. When a control command is issued, the corresponding switch 22 will generate an open or closed signal when the valves open or close. The signal generated by switch 22 will be fed back to the cockpit as a feedback signal to the pilot's control command output, so that the pilot can understand the actual opening and closing status of the valves.

[0063] This utility model relates to the field of air circulation refrigeration technology for special refrigeration equipment. Through a specific base 4 and lever 21, and their connection method, the control accuracy and reliability of the valve can be improved. The lever assembly 2 in this utility model has a simple structure, high reliability, and high accuracy, and can solve problems such as untimely or insufficient feedback of the valve opening signal. The valve position feedback mechanism in this utility model can convert the valve opening signal into an electrical signal and feed it back to the cockpit, realizing the signal response to the pilot's output command. As an airborne device, its response is rapid and its operation is reliable.

[0064] It will be readily understood by those skilled in the art that, without conflict, the advantageous technical features of the above-mentioned methods can be freely combined and superimposed.

[0065] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model. The above description is only a preferred embodiment of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.

Claims

1. A position feedback mechanism for a valve, characterized in that: The device includes a lever assembly (2), which includes a lever (21), an elastic element (23), and a trigger switch (22). The lever (21) is rotatably mounted on the movement trajectory of the rotating part (1) of the valve. The rotating part (1) is used to drive the valve plate (11) of the valve to rotate when rotating, so as to open or close the valve port (100) of the valve. The lever (21) is used to rotate when the rotating member (1) rotates to a preset angle position, so as to release the trigger part (220) of the trigger switch (22) and trigger the trigger switch (22); the trigger switch (22) is used to be installed on the fixed structure of the valve, so as to receive feedback on the opening and closing angle of the valve when the rotating member (1) is at the preset angle position; the elastic member (23) is used to push the lever (21) back to the initial position to press the trigger part (220) of the trigger switch (22).

2. The position feedback mechanism of the valve according to claim 1, characterized in that: The trigger switch (22) is a micro switch, and the trigger part (220) is a retractable trigger button on the micro switch; And / or, the rotating element (1) is a worm gear (1a).

3. The position feedback mechanism of the valve according to claim 1 or 2, characterized in that: One end of the elastic element (23) is connected to the lever (21), and the other end of the elastic element (23) is used to connect to the fixed structure on the valve.

4. The position feedback mechanism of the valve according to claim 1 or 2, characterized in that: It also includes a base (4), on which the lever (21) is rotatably mounted to connect to a fixed structure on the valve via the base (4).

5. The position feedback mechanism of the valve according to claim 4, characterized in that: The base (4) is provided with a first support wall (4a) and a second support wall (4b) opposite to each other. A rotation space is formed between the first support wall (4a) and the second support wall (4b) for the lever (21) to rotate. The first support wall (4a) is provided with a through hole (43), the second support wall (4b) is provided with a threaded hole (44), and the lever (21) is provided with a shaft hole (211). The lever assembly (2) further includes a bolt (24), the screw of which passes through the through hole (43) and the shaft hole (211) in sequence and is threaded into the threaded hole (44); wherein the lever (21) is rotatably mounted on the base (4) by means of the screw.

6. The position feedback mechanism of the valve according to claim 5, characterized in that: The screw has a smooth section (241); The screw is rotatably engaged with the shaft hole (211) through the smooth rod section (241); and / or, the screw passes through the through hole (43) through the smooth rod section (241).

7. The position feedback mechanism of the valve according to any one of claims 1-2 and 5-6, characterized in that: The lever (21) is provided with a widened part (212), and the lever (21) is rotated by the rotating member (1) through the widened part (212).

8. The position feedback mechanism of the valve according to any one of claims 1-2 and 5-6, characterized in that: The number of lever assemblies (2) is two, namely a first lever assembly (2a) and a second lever assembly (2b). The lever of the first lever assembly (2a) is rotatably set on the movement trajectory of one end of the rotating part (1) of the valve; and the lever of the second lever assembly (2b) is rotatably set on the movement trajectory of the other end of the rotating part (1) of the valve.

9. The position feedback mechanism of the valve according to claim 8, characterized in that: When the position feedback mechanism of the valve further includes a base (4), and the lever (21) is rotatably mounted on the base (4) to be connected to the fixed structure on the valve via the base (4), The levers of the first lever assembly (2a) and the second lever assembly (2b) are mounted on the same base (4).

10. A type of valve, characterized in that: Includes the position feedback mechanism according to any one of claims 1-9.

11. The valve according to claim 10, characterized in that: The rotating component (1) is provided with a protrusion, and the rotating component (1) pushes the lever (21) to rotate through the protrusion; And / or, when there are two lever assemblies (2), namely a first lever assembly (2a) and a second lever assembly (2b), the lever of the first lever assembly (2a) is rotatably set on the movement trajectory of one end of the rotating member (1) of the valve; and the lever (21) of the second lever assembly (2b) is rotatably set on the movement trajectory of the other end of the rotating member (1) of the valve, the rotating member (1) is the worm gear (1a) of the valve, the worm gear (1a) is C-shaped to form one end of the rotating member (1) and the other end of the rotating member (1) in the circumferential direction.

12. An air circulator, characterized in that: It includes the position feedback mechanism as described in any one of claims 1-9; or it includes the valve as described in claims 10-11.

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