Vortex ring air supply device with cavity volume adjusting function

Abstract

The utility model discloses a vortex ring air supply device with a cavity volume adjusting function. The vortex ring air supply device comprises an air supply cavity, an elastic film, a disturbance assembly, a first expansion ring, a second expansion ring, a nozzle installation ring and an adjusting structure. A first expansion ring and a second expansion ring are arranged in the air supply cavity in a sliding mode, the first expansion ring is arranged on the inner side of the air supply cavity in a sliding mode, the second expansion ring is arranged on the inner side of the first expansion ring in a sliding mode, and the end, away from the first expansion ring, of the second expansion ring is arranged in the nozzle mounting ring in a sliding mode; the elastic film is arranged at one end of the air supply cavity and used for pushing air in the cavity to form a vortex ring through reciprocating motion of the disturbance assembly. A nozzle adjusting sleeve is hinged to the outer side of the nozzle mounting ring and used for adjusting the sectional area of the air outlet; the adjusting structure comprises a first memory alloy spring, a second memory alloy spring and a third memory alloy spring which are connected with and drive the first expansion ring, the second expansion ring and the nozzle installation ring to slide in the axial direction so as to adjust the effective volume of the air supply cavity.

Description

Technical Field

[0001] This utility model relates to a vortex ring air supply device with cavity volume adjustment function, belonging to the field of vortex ring air supply technology. Background Technology

[0002] With its advantages of strong airflow concentration, long propagation distance, and low energy loss, ring-shaped airflow technology has been widely used in indoor ventilation, equipment heat dissipation, precision environmental temperature control (such as medical clean rooms and laboratories), and thermal management of new energy vehicles. Its core principle is to drive the gas inside the cavity through a driving component, causing the gas to be ejected from the nozzle in a vortex ring shape. Utilizing the rotational characteristics of the vortex ring's core, efficient airflow delivery is achieved, significantly improving airflow coverage and energy utilization compared to traditional direct-flow airflow.

[0003] Existing vortex ring air supply devices mostly have an integrated fixed air supply cavity structure, and the volume cannot be dynamically adjusted according to the actual air supply demand. This results in the core parameters such as the circulation (vortex intensity) and initial momentum of the vortex ring being limited, and it can only adapt to a single working condition. In addition, the nozzles of existing devices are mostly designed with fixed sizes, which cannot be linked with changes in cavity volume. When the airflow parameters inside the cavity change due to fluctuations in working conditions (such as changes in gas temperature and pressure), the fixed nozzles are difficult to adapt to the airflow outlet requirements. Therefore, this application proposes a vortex ring air supply device with cavity volume adjustment function. Utility Model Content

[0004] The purpose of this invention is to overcome the problem that the air supply cavity of existing vortex ring air supply devices is mostly an integrated fixed structure, and the volume cannot be dynamically adjusted according to actual air supply needs, and to provide a vortex ring air supply device with cavity volume adjustment function.

[0005] To achieve the above objectives / to solve the above technical problems, this utility model adopts the following technical solution:

[0006] A vortex ring air supply device with cavity volume adjustment function includes an air supply cavity, an elastic membrane, a disturbance component, a nozzle mounting ring, and an adjustment structure.

[0007] The air supply cavity is slidably provided with a first expansion ring and a second expansion ring. The first expansion ring is slidably disposed inside the air supply cavity, and the second expansion ring is slidably disposed inside the first expansion ring. The end of the second expansion ring away from the first expansion ring is slidably disposed inside the nozzle mounting ring.

[0008] The elastic membrane is located at one end of the air supply cavity and is used to push the gas in the cavity to form a vortex ring by reciprocating motion of the disturbance component.

[0009] A nozzle adjusting sleeve is hinged to the outside of the nozzle mounting ring to adjust the cross-sectional area of ​​the air outlet.

[0010] The adjustment structure includes a first shape memory alloy spring, a second shape memory alloy spring, and a third shape memory alloy spring, which are respectively connected to and drive the first expansion ring, the second expansion ring, and the nozzle mounting ring to slide axially to adjust the effective volume of the air supply cavity.

[0011] Optionally, the disturbance component includes a drive motor, a second permanent magnet, and a first permanent magnet disposed on the elastic membrane; the drive motor drives the second permanent magnet to rotate through the disturbance rod, and drives the elastic membrane to reciprocate through the magnetic attraction between the second permanent magnet and the first permanent magnet.

[0012] Optionally, the nozzle adjusting sleeve is rotatably mounted in the hinge groove of the nozzle mounting ring via a hinge shaft, and a rotary spring is sleeved on the hinge shaft; when the shape memory alloy spring is de-energized and reset, and the cavity volume is restored, the rotary spring releases its stored energy, driving the nozzle adjusting sleeve to automatically reset to the initial opening.

[0013] Optionally, the nozzle adjustment sleeve is equipped with a linkage rope, one end of which is connected to a first connecting plate on the air supply cavity, and the other end is connected to a second connecting plate on the nozzle adjustment sleeve. When the volume of the air supply cavity changes due to the extension and contraction of the memory alloy spring, the linkage rope is stretched or relaxed, thereby driving the nozzle adjustment sleeve to rotate around the hinge axis, so as to realize the synchronous adjustment of the nozzle cross-sectional area and the cavity volume.

[0014] Optionally, a telescopic assembly is provided between the air supply cavity and the nozzle adjustment sleeve. The telescopic assembly consists of a first telescopic sleeve, a second telescopic sleeve, a third telescopic sleeve, and a flexible telescopic sleeve that are sequentially sleeved together. The linkage rope is connected to and passes through the inside of the telescopic assembly.

[0015] Optionally, the bottom of the air supply cavity is provided with a support base.

[0016] Optionally, a support frame is provided on the outer side of the nozzle mounting ring, and the support frame is slidably connected to the support base.

[0017] Optionally, the support frame is slidably engaged in a sliding groove on the support base via a slider.

[0018] Optionally, a rectifier plate is provided on the inner side of the nozzle mounting ring to rectify the outflowing gas.

[0019] Optionally, the air supply cavity is provided with mounting holes for installing an elastic membrane.

[0020] Compared with the prior art, the beneficial effects achieved by this utility model are as follows:

[0021] 1. Cavity volume adjustment for optimized vortex ring performance: Multiple shape memory alloy springs drive the expansion ring and nozzle mounting ring to slide, flexibly adjusting the cavity volume and dynamically changing the circulation and momentum of the vortex ring. This design breaks through the limitations of traditional fixed volume, satisfying both large-space, long-distance air delivery (the vortex ring propagates further when the volume increases) and small-space, short-distance air delivery (the vortex ring is compact and energy consumption is low when the volume decreases). Simultaneously, it improves vortex ring stability, reduces wake effects, extends propagation distance, and increases air delivery efficiency.

[0022] 2. Linked adjustment of nozzle and cavity enhances reliability: A linkage rope enables synchronized changes in nozzle size and cavity volume, dynamically matching the nozzle cross-sectional area and volume. This avoids problems such as "airflow obstruction" and "ring core tearing," optimizing the quality of vortex ring formation. The rotary spring stores energy during nozzle adjustment sleeve rotation and automatically resets upon power failure, eliminating the need for additional drive components. This simplifies the structure, reduces energy consumption, and ensures the continuity and reliability of the adjustment process. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall three-dimensional structure in an embodiment of this utility model;

[0024] Figure 2 This is a schematic diagram of the overall three-dimensional structure of the support base in an embodiment of this utility model;

[0025] Figure 3 This is a schematic diagram of the overall three-dimensional structure of the air supply cavity in an embodiment of this utility model;

[0026] Figure 4 This is a schematic diagram of the overall three-dimensional structure of the elastic membrane and the first permanent magnet in an embodiment of this utility model;

[0027] Figure 5 This is a schematic diagram of the overall three-dimensional structure of the disturbance component in an embodiment of this utility model;

[0028] Figure 6 This is a schematic diagram of the overall three-dimensional structure of the first expansion ring in an embodiment of this utility model;

[0029] Figure 7 This is a schematic diagram of the overall three-dimensional structure of the second expansion ring in an embodiment of this utility model;

[0030] Figure 8 This is a schematic diagram of the overall three-dimensional structure of the nozzle mounting ring in an embodiment of this utility model;

[0031] Figure 9 This is a schematic diagram of the overall three-dimensional structure of the nozzle adjustment sleeve in an embodiment of this utility model;

[0032] Figure 10 This is a schematic diagram of the overall three-dimensional structure of the telescopic kit in an embodiment of this utility model;

[0033] Figure 11 This is a schematic diagram of the overall three-dimensional structure of the support frame in an embodiment of this utility model;

[0034] Figure 12 This is a schematic diagram of the overall three-dimensional structure of the rectifier plate in an embodiment of this utility model.

[0035] In the figure, 1-support base, 2-air supply cavity, 3-elastic membrane, 4-first permanent magnet, 5-disturbance component, 6-first expansion ring, 7-second expansion ring, 8-nozzle mounting ring, 9-nozzle adjustment sleeve, 10-telescopic kit, 11-support frame, 12-rectifier plate;

[0036] 101 - Sliding groove, 102 - Support plate;

[0037] 201 - First shape memory alloy spring, 202 - First connecting plate, 203 - Mounting hole;

[0038] 501-Padded block, 502-Drive motor, 503-Disturbance rod, 504-Second permanent magnet;

[0039] 601 - Second shape memory alloy spring;

[0040] 801 Third shape memory alloy spring, 802 - clearance groove, 803 - hinge groove;

[0041] 901-Hinge shaft, 902-Rotation spring, 903-Second connecting plate, 904-Linkage rope;

[0042] 1001 - First telescopic sleeve, 1002 - Second telescopic sleeve, 1003 - Third telescopic sleeve, 1004 - Flexible telescopic sleeve;

[0043] 1101 - Slider. Detailed Implementation

[0044] The present invention will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and should not be used to limit the scope of protection of the present invention.

[0045] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and 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 of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0046] like Figures 1-12 As shown, a vortex ring air supply device with cavity volume adjustment function is disclosed, including an air supply cavity 2, an elastic membrane 3, a disturbance component 5, a first expansion ring 6, a second expansion ring 7, a nozzle mounting ring 8, and an adjustment structure.

[0047] The air supply cavity 2 is internally provided with a first expansion ring 6 and a second expansion ring 7. The first expansion ring 6 is slidably disposed inside the air supply cavity 2, and the second expansion ring 7 is slidably disposed inside the first expansion ring 6, with one end of the second expansion ring 7 slidably disposed within the nozzle mounting ring 8. The bottom of the air supply cavity 2 is provided with a support base 1, and the outside of the nozzle mounting ring 8 is provided with a support frame 11. The support frame 11 is slidably connected to the support base 1, and the support frame 11 is slidably engaged in the sliding groove 101 on the support base 1 via a slider 1101. Figure 11 As shown.

[0048] like Figure 4 As shown, the elastic membrane 3 is disposed at one end of the air supply cavity 2, and is used to push the gas in the cavity to form a vortex ring by reciprocating motion of the disturbance component 5; the air supply cavity 2 is provided with mounting holes 203 for installing the elastic membrane;

[0049] A nozzle adjusting sleeve 9 is hinged to the outer side of the nozzle mounting ring 8 to adjust the cross-sectional area of ​​the air outlet. The nozzle adjusting sleeve 9 is wrapped with an elastic membrane (not shown in the figure) so that when the nozzle adjusting sleeve 9 is opened, the nozzle remains a continuous closed nozzle, ensuring stable generation of vortex rings. A flow rectifier 12 is provided on the inner side of the nozzle mounting ring 8 to rectify the outflowing gas, such as... Figure 12 As shown;

[0050] like Figure 3 , Figure 6 and Figure 8As shown, the adjustment structure includes a first shape memory alloy spring 201, a second shape memory alloy spring 601, and a third shape memory alloy spring 801, which are respectively connected to and drive the first expansion ring 6, the second expansion ring 7, and the nozzle mounting ring 8 to slide axially to adjust the effective volume of the air supply cavity 2. The first shape memory alloy spring 201, the second shape memory alloy spring 601, and the third shape memory alloy spring 801 deform after being energized. By controlling the magnitude or time of the energizing current, the displacement of each expansion ring can be precisely adjusted, thereby realizing multi-level or continuous adjustment of the volume of the air supply cavity 2.

[0051] The inner side of the support base 1 is equipped with a storage battery; the storage battery is equipped with three power switches as needed, which are evenly distributed on the outer side wall of the support base 1, and the three power switches are electrically connected to the storage battery through wires.

[0052] The first memory alloy spring 201, the second memory alloy spring 601, and the third memory alloy spring 801 are electrically connected to three power switches via wires. The power supply, the power switches, and the memory alloy springs form three independent series DC circuits via wires. When any one of the power switches is closed, only the memory alloy spring in the corresponding circuit is energized. Due to Joule heating, it undergoes thermal deformation and elongates, pushing the corresponding expansion ring or nozzle mounting ring 8 to slide slightly axially.

[0053] like Figure 2 As shown, the disturbance component 5 includes a drive motor 502, a disturbance rod 503, a second permanent magnet 504, and a first permanent magnet 4 disposed on the elastic membrane 3; the drive motor 502 drives the second permanent magnet 504 to rotate through the disturbance rod 503, and drives the elastic membrane 3 to reciprocate through the magnetic attraction between the second permanent magnet 504 and the first permanent magnet 4.

[0054] like Figure 9 As shown, the nozzle adjusting sleeve 9 is rotatably mounted in the hinge groove 803 within the clearance groove 802 of the nozzle mounting ring 8 via a hinge shaft 901, and a rotary spring 902 is sleeved on the hinge shaft 901. When the shape memory alloy spring is de-energized and reset, and the cavity volume is restored, the rotary spring 902 releases its stored energy, driving the nozzle adjusting sleeve 9 to automatically reset to its initial opening. The nozzle adjusting sleeve 9 is provided with a linkage rope 904, one end of which is connected to the first connecting plate 202 on the air supply cavity 2, and the other end is connected to the second connecting plate 903 on the nozzle adjusting sleeve 9. When the volume of the air supply cavity 2 changes due to the extension and contraction of the shape memory alloy spring, the linkage rope 904 is stretched or relaxed, thereby driving the nozzle adjusting sleeve 9 to rotate around the hinge shaft 901, realizing the synchronous adjustment of the nozzle cross-sectional area and the cavity volume.

[0055] In the specific implementation process of this embodiment, such as Figure 10As shown, a telescopic assembly 10 is provided between the air supply cavity 2 and the nozzle adjustment sleeve 9. The telescopic assembly 10 is composed of a first telescopic sleeve 1001, a second telescopic sleeve 1002, a third telescopic sleeve 1003 and a flexible telescopic sleeve 1004 that are sequentially sleeved together. The linkage rope 904 is connected and passed through the inside of the telescopic assembly 10 to protect the linkage rope 904 and improve its movement stability and service life.

[0056] The working principle of this utility model:

[0057] Reference Figure 1 As shown, in the initial state, the first memory alloy spring 201 and the second memory alloy spring 601 are in an unenergized state. At the same time, the first expansion ring 6 is slidably disposed inside the air supply cavity 2, and the right end of the first expansion ring 6 is connected to the first memory alloy spring 201 disposed inside the air supply cavity 2. The right end of the second expansion ring 7 is slidably disposed inside the first expansion ring 6, and the right end of the second expansion ring 7 is connected to the second memory alloy spring 601. Meanwhile, the left end of the second expansion ring 7 is slidably disposed inside the nozzle mounting ring 8, and the third memory alloy spring 801 inside the nozzle mounting ring 8 is disposed on the left end of the second expansion ring 7.

[0058] During vortex ring air supply: The drive motor 502, mounted on the pad 501, drives the disturbance rod 503 to rotate. The rotating disturbance rod 503 drives the second permanent magnet 504 to rotate, causing the second permanent magnet 504 to move towards the elastic membrane 3 located in the mounting hole 203. Since the magnetic poles between the second permanent magnet 504 and the first permanent magnet 4 are attracted to each other, the second permanent magnet 504 will be attracted to the first permanent magnet 4 when it approaches the elastic membrane 3. When the drive motor 502 reverses, the disturbance rod 503 will cause the second permanent magnet 504 to move away from the elastic membrane 3. The attraction causes the second permanent magnet 504 to move the elastic membrane 3. When the tension of the elastic membrane 3 is greater than the attraction between the second permanent magnet 504 and the first permanent magnet 4, the elastic membrane 3 will reset, thereby pushing the gas in the air supply cavity 2. The gas in the air supply cavity 2 will flow between the first expansion ring 6 and the second expansion ring 7 and be ejected from the nozzle mounting ring 8, thereby converting the gas into a vortex ring shape and increasing the air supply distance. The rectifier plate 12 is set inside the nozzle mounting ring 8. Under the action of the rectifier plate 12, the uniformity of gas flow can be improved, thereby improving the quality of vortex ring generation.

[0059] Adjusting the vortex ring state: When it is necessary to adjust the cavity volume of the vortex ring air supply device, the first memory alloy spring 201, the second memory alloy spring 601, and the third memory alloy spring 801 are energized. Subsequently, the lengths of the first memory alloy spring 201, the second memory alloy spring 601, and the third memory alloy spring 801 will change. This causes the first extension ring 6, the second extension ring 7, and the nozzle mounting ring 8 to be pushed by the first extension ring 6, the second extension ring 7, and the nozzle mounting ring 8 respectively. This can increase the cavity volume of the vortex ring air supply device. When the nozzle mounting ring 8 moves, the support frame 11 located outside the nozzle mounting ring 8 will slide in the sliding groove 101 through the slider 1101, thereby improving the stability of the first extension ring 6, the second extension ring 7, and the nozzle mounting ring 8 during movement.

[0060] When the cavity volume of the vortex ring air supply device is adjusted, the stability and propagation distance of the vortex ring can be directly improved, the wake effect is significantly reduced, and thus the propagation distance of the vortex ring in the air is extended.

[0061] Because a linkage rope 904 is provided between the second connecting plate 903 on the nozzle adjusting sleeve 9 and the first connecting plate 202 on the air supply cavity 2, subsequent changes in the cavity volume of the adjusting vortex air supply device will stretch the linkage rope 904. Since the nozzle adjusting sleeve 9 is hingedly mounted in the hinge groove 803 on the relief groove 802 via the hinge shaft 901, the stretching of the linkage rope 904 will cause the nozzle adjusting sleeve 9 to rotate along the relief groove 802, thereby adjusting the opening angle of the nozzle adjusting sleeve 9. When the nozzle adjustment sleeve 9 rotates, the rotary spring 902 also stores energy. When the first memory alloy spring 201, the second memory alloy spring 601 and the third memory alloy spring 801 are de-energized, the cavity volume of the vortex ring air supply device will also be restored. In this way, the energy-stored rotary spring 902 will drive the nozzle adjustment sleeve 9 to reset, so that the nozzle size changes in conjunction with the volume of the vortex ring air supply device. The core is to optimize the formation quality, propagation characteristics and air supply efficiency of the vortex ring from the root by dynamically matching the effective cross-sectional area of ​​the nozzle with the changes in the cavity volume.

[0062] The first telescopic sleeve 1001, the second telescopic sleeve 1002, the third telescopic sleeve 1003, and the flexible telescopic sleeve 1004 are interlocked, and the linkage rope 904 is located in the first telescopic sleeve 1001, the second telescopic sleeve 1002, the third telescopic sleeve 1003, and the flexible telescopic sleeve 1004. This comprehensively improves the motion stability, environmental adaptability, and service life of the linkage rope 904.

[0063] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0064] The above description is only a preferred embodiment of the present 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 the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A vortex ring air supply device with cavity volume adjustment function, characterized in that, It includes an air supply chamber (2), an elastic membrane (3), a disturbance component (5), a nozzle mounting ring (8), and an adjustment structure; The air supply cavity (2) is slidably provided with a first expansion ring (6) and a second expansion ring (7). The first expansion ring (6) is slidably provided inside the air supply cavity (2), and the second expansion ring (7) is slidably provided inside the first expansion ring (6). The end of the second expansion ring (7) away from the first expansion ring (6) is slidably provided inside the nozzle mounting ring (8). The elastic membrane (3) is located at one end of the air supply cavity (2) and is used to push the gas in the cavity to form a vortex ring by reciprocating motion of the disturbance component (5); The nozzle mounting ring (8) is hinged to the outside of the nozzle adjustment sleeve (9) for adjusting the cross-sectional area of ​​the air outlet. The adjustment structure includes a first memory alloy spring (201), a second memory alloy spring (601) and a third memory alloy spring (801), which are connected to and drive the first expansion ring (6), the second expansion ring (7) and the nozzle mounting ring (8) to slide axially to adjust the effective volume of the air supply cavity (2).

2. The vortex ring air supply device with cavity volume adjustment function according to claim 1, characterized in that, The disturbance component (5) includes a drive motor (502), a second permanent magnet (504), and a first permanent magnet (4) disposed on the elastic membrane (3). The drive motor (502) drives the second permanent magnet (504) to rotate through the disturbance rod (503), and drives the elastic membrane (3) to reciprocate through the magnetic attraction between the second permanent magnet (504) and the first permanent magnet (4).

3. The vortex ring air supply device with cavity volume adjustment function according to claim 1, characterized in that, The nozzle adjusting sleeve (9) is rotatably mounted in the hinge groove (803) in the clearance groove (802) of the nozzle mounting ring (8) via the hinge shaft (901), and a rotary spring (902) is sleeved on the hinge shaft (901); when the memory alloy spring is de-energized and reset, and the cavity volume is restored, the rotary spring (902) releases the stored energy and drives the nozzle adjusting sleeve (9) to automatically reset to the initial opening.

4. The vortex ring air supply device with cavity volume adjustment function according to claim 3, characterized in that, The nozzle adjustment sleeve (9) is equipped with a linkage rope (904). One end of the linkage rope (904) is connected to the first connecting plate (202) on the air supply cavity (2), and the other end is connected to the second connecting plate (903) on the nozzle adjustment sleeve (9). When the volume of the air supply cavity (2) changes due to the extension and retraction of the memory alloy spring, the linkage rope (904) is stretched or relaxed, thereby driving the nozzle adjustment sleeve (9) to rotate around the hinge shaft (901) to realize the synchronous adjustment of the nozzle cross-sectional area and the cavity volume.

5. The vortex ring air supply device with cavity volume adjustment function according to claim 4, characterized in that, A telescopic kit (10) is provided between the air supply cavity (2) and the nozzle adjustment sleeve (9). The telescopic kit (10) is composed of a first telescopic sleeve (1001), a second telescopic sleeve (1002), a third telescopic sleeve (1003) and a flexible telescopic sleeve (1004) that are sequentially sleeved together. The linkage rope (904) is connected to and passes through the inside of the telescopic kit (10).

6. The vortex ring air supply device with cavity volume adjustment function according to claim 1, characterized in that, The bottom of the air supply cavity (2) is provided with a support base (1).

7. The vortex ring air supply device with cavity volume adjustment function according to claim 6, characterized in that, The nozzle mounting ring (8) is provided with a support frame (11) on the outside, and the support frame (11) is slidably connected to the support base (1).

8. The vortex ring air supply device with cavity volume adjustment function according to claim 7, characterized in that, The support frame (11) is slidably fitted into the sliding groove (101) on the support base (1) via a slider (1101).

9. The vortex ring air supply device with cavity volume adjustment function according to claim 1, characterized in that, The nozzle mounting ring (8) has a rectifier plate (12) on its inner side for rectifying the outflowing gas.

10. The vortex ring air supply device with cavity volume adjustment function according to claim 1, characterized in that, The air supply cavity (2) is provided with mounting holes (203) for installing the elastic membrane.

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