Air pressure stabilizing device, air pressure control method, and computer program product

Abstract

The embodiment of the present application provides a kind of air pressure stabilizing device, air pressure control method and computer program product.In the design of air pressure stabilizing device, by the gas buffer tank of air pressure stabilizing device is designed into variable volume air cavity, so that the gas buffer tank can be based on current pressure value dynamic adjustment volume, when the pressure in gas buffer tank rises, the volume of gas buffer tank can be increased, so that the influence of pressure rise can be reduced.On the contrary, when the pressure in gas buffer tank reduces, the volume of gas buffer tank can be reduced, and the pressure of gas buffer tank is supplemented, so that the pressure value of the gas output to the gas end by gas buffer tank is stabilized around the target pressure value, and there is no sharp fluctuation, and then the control precision of air pressure stabilizing device can be improved, so that in low pressure control scene, accurate pressure control can also be realized.

Description

Technical Field

[0001] This application relates to the field of air pressure control technology, and more specifically, to an air pressure stabilizing device, an air pressure control method, and a computer program product. Background Technology

[0002] Pneumatic pressure stabilization devices are widely used in various fields. However, for some low-pressure control scenarios, existing devices often fail to achieve precise pressure control and cannot meet the pressure control accuracy requirements of these scenarios. For example, taking pneumatic 3D printing as an example, the pressure required for 3D printing is often relatively low. When using existing pneumatic pressure stabilization devices for pressure control, the air pressure output from the device to the user often fluctuates significantly. This leads to critical quality problems such as poor interface fusion and inaccurate functional gradient distribution when laminating functional materials with complex rheological properties (such as high-thixotropic photosensitive resins and high-solids-content ceramic pastes). Therefore, for low-pressure control scenarios, there is an urgent need for a pneumatic pressure stabilization device that can achieve precise pressure control. Summary of the Invention

[0003] In view of this, this application provides a pressure stabilizing device, a pressure control method, and a computer program product.

[0004] According to a first aspect of this application, a pressure stabilizing device is provided, the pressure stabilizing device comprising a gas buffer tank, a pressure sensor disposed within the gas buffer tank, a pressure regulating valve, and a controller, the controller being communicatively connected to the pressure sensor and the pressure regulating valve, the pressure regulating valve comprising an inlet valve and an outlet valve, the gas buffer tank comprising an inlet port, an outlet port, and a supply port, the inlet port being connected to the inlet valve, the outlet port being connected to the outlet valve, and the supply port being connected to a gas-consuming end;

[0005] The pressure sensor is used to detect the current pressure value in the gas buffer tank and send it to the controller;

[0006] The controller is used to acquire the target pressure value set by the user, and control the opening and closing state of the pressure regulating valve based on the difference between the target pressure value and the current pressure value, so that the pressure value output by the gas buffer tank to the gas user is the target pressure value.

[0007] The volume of the gas buffer tank can be automatically adjusted based on the pressure value inside the gas buffer tank, so that the gas pressure output from the gas buffer tank to the gas user is stable at the target pressure value.

[0008] According to a second aspect of this application, a pneumatic pressure control method is provided, the method being applicable to a pneumatic pressure stabilizing device, the pneumatic pressure stabilizing device comprising a controller, a gas buffer tank, a pressure sensor disposed within the gas buffer tank, and a pneumatic pressure regulating valve, the controller being communicatively connected to the pressure sensor and the pneumatic pressure regulating valve respectively; the method is executed by the controller, the method comprising:

[0009] Obtain the target pressure value set by the user and the current pressure value detected by the pressure sensor;

[0010] The pressure regulating valve is opened based on the difference between the target pressure value and the current pressure value.

[0011] Predict the pressure change in the gas buffer tank during the closing of the pressure regulating valve;

[0012] The timing for closing the pressure regulating valve is determined based on the pressure change value; the closing timing is such that the sum of the pressure value inside the gas buffer tank detected at the time the pressure regulating valve closes and the pressure change value is the target pressure value.

[0013] The pressure regulating valve is closed based on the specified closing timing.

[0014] According to a third aspect of this application, a muffler is provided for silencing gas discharged from an exhaust device. The muffler includes an air inlet, a first sound-absorbing cavity, a second sound-absorbing cavity, and a gas flow channel communicating with the air inlet and penetrating the first sound-absorbing cavity and the second sound-absorbing cavity.

[0015] The first sound-absorbing cavity is provided with a plurality of conical reflective surfaces, which are arranged at intervals along the gas flow channel. Each conical reflective surface has an opening at its top, which is located near the air inlet and is used to form part of the gas flow channel.

[0016] The second sound-absorbing cavity is provided with multiple exhaust holes;

[0017] The gas discharged from the exhaust device enters the first sound absorption cavity through the air inlet, is reflected sequentially by multiple conical reflective surfaces in the first sound absorption cavity, enters the second sound absorption cavity along the gas flow channel, and is dispersed and discharged from multiple exhaust holes on the second sound absorption cavity.

[0018] According to a fourth aspect of this application, a computer program product is provided, the computer program product comprising a computer program that, when executed, implements the method mentioned in the second aspect above.

[0019] According to a fifth aspect of this application, a computer-readable storage medium is provided, on which a computer program is stored, which, when executed, implements the method mentioned in the second aspect above.

[0020] By applying the solution provided in this application, when designing a pneumatic pressure stabilizing device, the gas buffer tank is designed as a variable-volume gas chamber. This allows the gas buffer tank to dynamically adjust its volume based on the current pressure value. When the pressure inside the gas buffer tank increases, its volume can be increased to mitigate the impact of the pressure rise. Conversely, when the pressure inside the gas buffer tank decreases, its volume can be decreased to replenish the pressure. This ensures that the pressure of the gas output from the gas buffer tank to the user remains stable near the target pressure value, preventing drastic fluctuations. Consequently, the pressure control accuracy of the pneumatic pressure stabilizing device is improved, enabling precise pressure control even in low-pressure scenarios.

[0021] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the structure of a pneumatic pressure stabilizing device according to an embodiment of this application.

[0024] Figure 2 This is a schematic diagram of a gas buffer tank according to an embodiment of this application.

[0025] Figure 3 This is a schematic diagram of a gas buffer tank according to another embodiment of this application.

[0026] Figure 4 This is a schematic diagram of the structure of a pneumatic pressure stabilizing device according to another embodiment of this application.

[0027] Figure 5 This is a schematic diagram of the structure of a muffler according to another embodiment of this application.

[0028] Figure 6 This is a cross-sectional view of a muffler according to another embodiment of this application.

[0029] Figure 7 This is a flowchart of a pneumatic pressure control method according to another embodiment of this application. Detailed Implementation

[0030] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0031] In low-pressure control scenarios such as 3D printing, existing air pressure stabilization devices often have low pressure control accuracy, resulting in large fluctuations in the air pressure output to the air user, which cannot meet the pressure control accuracy requirements of such scenarios.

[0032] The applicant's research and analysis revealed the following reasons for the low pressure control accuracy of existing pneumatic pressure stabilizing devices in low-pressure scenarios: Considering factors such as safety and durability, existing pneumatic pressure stabilizing devices typically use rigid gas buffer tanks. Due to the low-pressure control scenario, the gas in the gas buffer tank is often relatively small, and the minimum opening of the gas pressure regulating valve (inlet valve or exhaust valve) connected to the gas buffer tank is often limited and cannot be made particularly small. This means that the air flow of the inlet valve and exhaust valve may be relatively large, which can lead to a sudden increase or decrease in the amount of gas in the gas buffer tank. Consequently, the gas source pressure output from the gas buffer tank to the gas user fluctuates drastically, affecting the accuracy of pressure control.

[0033] Based on this, the applicant designed a pneumatic pressure stabilizing device to improve the accuracy of pneumatic pressure control in low-pressure control scenarios. For example... Figure 1 The diagram shows a schematic of the structure of a pressure stabilizing device 10 provided in this embodiment of the application. The pressure stabilizing device 10 includes a gas buffer tank 11, a pressure sensor 12, a pressure regulating valve 13, and a controller 14. The pressure sensor 12 can be installed inside the gas buffer tank 11 to detect the current gas pressure value of the gas buffer tank 11 in real time. The pressure regulating valve 13 may include an inlet valve 131 for controlling the amount of gas entering the gas buffer tank 11, and an exhaust valve 132 for controlling the amount of gas discharged from the gas buffer tank 11. The gas buffer tank 11 may include an inlet port 121, an exhaust port 122, and a supply port 123. The inlet port 121 can be connected to the inlet valve 131. When the inlet valve 131 is open, the gas supplied by the supply end 20 (e.g., an air compressor) can enter the gas buffer tank 11 through the inlet port 121 to increase the gas pressure inside the gas buffer tank 11. The exhaust port 122 can be connected to the exhaust valve 132. When the exhaust valve 132 is open, the gas in the gas buffer tank 11 can be discharged through the exhaust port 122 to reduce the gas pressure in the gas buffer tank 11. The gas supply port 123 is used to connect to the gas consumption end 30 so as to output a gas source with a certain pressure to the gas consumption end 30 to achieve pressure control.

[0034] The controller 14 is communicatively connected to the pressure sensor 12 and the air pressure regulating valve 13. The specific connection method can be a wired connection or a wireless connection, and this application embodiment does not limit it.

[0035] The pressure sensor 12 detects the current pressure value in the gas buffer tank 11 and sends it to the controller 14. The controller 14 can be used to acquire the target pressure value set by the user. In some scenarios, the pressure stabilizing device 10 can integrate a display screen to provide a user interface, allowing the user to input the target pressure value based on the needs of the gas consumption terminal 30. In other scenarios, the controller 14 of the pressure stabilizing device 10 can also be directly connected to other devices with an interactive interface, such as a user's computer or mobile phone, so that the user can input the target pressure value through the interactive interface provided by the other device.

[0036] After acquiring the current pressure value sent by the pressure sensor 12 and the target pressure value set by the user, the controller 14 can control the opening and closing state of the pressure regulating valve 13 based on the difference between the two, thereby adjusting the gas pressure in the gas buffer tank 11 so that the gas pressure output from the gas buffer tank 11 to the gas user 30 through the gas supply port 123 is the target pressure value. For example, if the current pressure value is less than the target pressure value, the inlet valve 131 is opened to allow gas from the gas supply port 20 to enter the gas buffer tank 11, thereby increasing the gas pressure in the gas buffer tank 11. If the current pressure value is greater than the target pressure value, the exhaust valve 132 is opened to allow gas in the gas buffer tank 11 to be discharged, thereby decreasing the gas pressure in the gas buffer tank 11.

[0037] In order to reduce the fluctuation of the gas pressure output by the gas buffer tank 11, the gas buffer tank 11 can be designed as a gas chamber with a variable volume. That is, the volume of the gas buffer tank 11 can be automatically adjusted based on the pressure value inside the gas buffer tank 11. For example, if the amount of gas in the gas buffer tank 11 suddenly increases sharply, that is, if the gas pressure inside the gas buffer tank 11 suddenly increases, the volume of the gas buffer tank 11 can also automatically increase, thereby ensuring that the gas source pressure output by the gas buffer tank 11 to the gas user 30 remains stable. Similarly, if the amount of gas in the gas buffer tank 11 suddenly decreases, that is, if the gas pressure inside the gas buffer tank 11 suddenly decreases, the volume of the gas buffer tank 11 can also automatically decrease, thereby ensuring that the gas source pressure output by the gas buffer tank 11 to the gas user 30 remains stable and does not fluctuate drastically. That is, by designing the gas buffer tank 11 as a variable volume gas chamber, the gas buffer tank 11 can dynamically adjust its volume based on the current pressure value, so that the pressure value of the gas output by the gas buffer tank 11 to the gas consumption end 30 is stable near the target pressure value and there will be no drastic fluctuations.

[0038] In some embodiments, the pressure stabilizing device 10 in this application can be modularized, meaning that each component of the pressure stabilizing device 10 can be selected from some general or standard interface components to facilitate the replacement of certain components. For example, if the pressure stabilizing device 10 is used in a 3D printing scenario, a small, standardized pressure sensor 12, an electrically controlled proportional intake valve 131, and an exhaust valve 132 can be selected. The pressure sensor 12 uses high-precision analog transmission, and the electrically controlled proportional intake valve 131 and exhaust valve 132 use standard air pipe interface components and general control signals for control. This allows for the replacement of different models of valves and sensors to adapt to different pressure range requirements. Furthermore, all components (including the controller 14, gas buffer tank 11, electrically controlled proportional intake valve 131, sensor, power supply, etc.) can be integrated into a controllable housing, adapting to the integration needs of different types of instruments. In some embodiments, such as Figure 2 As shown, the air inlet 121, exhaust outlet 122, and air supply outlet 123 can be located at the top of the gas buffer tank 11. A retractable structure 114 is provided between the top and bottom of the gas buffer tank 11. This retractable structure 114 can automatically expand and contract based on the current pressure value inside the gas buffer tank 11 to adjust the volume of the gas buffer tank 11. For example, when the pressure inside the gas buffer tank 11 is low, the retractable structure 114 can be in a contracted state, resulting in a smaller volume of the entire gas buffer tank 11. When the pressure inside the gas buffer tank 11 increases, the retractable structure 114 can be in an extended state, that is, the overall length of the gas buffer tank 11 increases, thereby increasing the volume of the entire gas buffer tank 11.

[0039] In some embodiments, such as Figure 3 As shown, the bottom of the gas buffer tank 11 is an elastic diaphragm 115. This elastic diaphragm 115 can automatically expand outward or contract inward based on pressure changes within the gas buffer tank 11 to adjust the volume of the gas buffer tank 11. For example, the elastic diaphragm 115 has an elastic structure. When the pressure inside the gas buffer tank 11 increases, the elastic diaphragm 115 expands outward, increasing the volume of the gas buffer tank 11, thereby absorbing excess gas and mitigating the effects of increased pressure. Conversely, when the pressure inside the gas buffer tank 11 decreases, the elastic diaphragm 115 can contract inward, reducing the volume of the gas buffer tank 11, releasing the stored gas, and replenishing the pressure inside the gas buffer tank 11.

[0040] By employing a combination design of a retractable structure 114 and an elastic diaphragm 115, the gas buffer tank 11 can adapt to different pressure ranges. This ability to dynamically adjust the volume allows the gas buffer tank 11 to react quickly when the pressure rises or falls, thereby maintaining a stable pressure output from the gas buffer tank 11 to the gas user end 30, avoiding drastic pressure fluctuations, improving pressure control accuracy, and enabling the gas pressure output from the gas pressure stabilizing device 10 to the user end to be maintained more accurately at the target pressure value set by the user.

[0041] In some embodiments, the gas buffer tank 11 may be made of a flexible material, such as TPU, rubber or similar elastic material.

[0042] In some embodiments, the gas buffer tank 11 can be integrally formed by 3D printing. For example, the stretchable structure 114, the elastic diaphragm 115, and the entire tank body in the gas buffer tank 11 can all be integrally formed by 3D printing. To facilitate 3D printing, the gas buffer tank 11 can be made of TPU.

[0043] In some embodiments, considering that the exhaust valve 132 of the pressure stabilizing device 10 generates significant noise during the exhaust process, which may cause some interference to the user, in order to reduce the noise generated during the exhaust process, such as... Figure 4 As shown, the air pressure stabilizing device 10 may also include a silencer 15, which is connected to the exhaust valve 132 and is used to silence the gas discharged from the exhaust valve 132.

[0044] In some embodiments, the muffler 15 may be one of the mufflers 15 that are already available on the market.

[0045] In some embodiments, to further improve the performance of the muffler 15, the applicant has designed a new muffler 15 based on the usage scenarios and characteristics of the pressure regulator. For example... Figure 5 As shown and Figure 6As shown, the muffler 15 includes an air inlet 151, a first sound-absorbing cavity 152, a second sound-absorbing cavity 153, and a gas flow channel 154 communicating with the air inlet 151 and passing through the first and second sound-absorbing cavities 152 and 153. The air inlet 151 is connected to an exhaust valve 132, and the gas discharged from the exhaust valve 132 can enter the muffler 15 through the air inlet 151. The first sound-absorbing cavity 152 is provided with a plurality of conical reflective surfaces 152a, which are arranged at intervals along the gas flow channel 154. Each conical reflective surface 152a has an opening 152b at its top, which is located near the air inlet 151. The opening 152b forms part of the gas flow channel 154, that is, gas can flow along the opening 152b of each conical reflective surface 152a into the second sound-absorbing cavity 153.

[0046] The second sound-absorbing cavity 153 is provided with multiple exhaust holes 153a, which are used to disperse and discharge the gas after it has been processed by the first sound-absorbing cavity 152.

[0047] The gas discharged from the exhaust valve 132 enters the first sound absorption chamber 152 through the air inlet 151. After being reflected in sequence by multiple conical reflective surfaces 152a in the first sound absorption chamber 152, it enters the second sound absorption chamber 153 along the gas flow channel 154 and is dispersed and discharged from multiple exhaust holes 153a on the second sound absorption chamber 153.

[0048] By providing a conical reflective surface 152a within the first sound-absorbing cavity 152, multiple reflections and absorption of sound waves within the muffler 15 can be promoted. The sound waves are reflected multiple times during propagation, increasing the propagation path length within the muffler 15. A longer propagation path helps to more effectively absorb and weaken sound wave energy. Simultaneously, the sound waves are dispersed in different directions during propagation. This dispersion helps reduce the intensity of the sound waves in specific directions, thereby reducing noise radiation. The conical reflective surface 152a not only affects sound wave propagation but also influences gas flow characteristics. By guiding gas flow, the conical reflective surface 152a helps reduce turbulence and eddies generated by the gas flow. These flow characteristics are often related to noise generation; optimizing gas flow can further reduce noise.

[0049] In addition, by providing multiple exhaust holes 153a in the second sound-absorbing cavity 153, the gas can be dispersed when it is discharged, thereby reducing the noise generated during exhaust. This dispersed exhaust method helps to reduce the airflow speed during exhaust, reduce the impact of airflow on the surrounding environment, and further reduce noise.

[0050] In some embodiments, the first sound-absorbing cavity 152 and the second sound-absorbing cavity 153 are further provided with porous sound-absorbing material. The porous sound-absorbing material can be a material with sound-absorbing function, such as an aerogel coating or sound-absorbing cotton. By designing a conical reflective surface 152a and simultaneously providing sound-absorbing material in the sound-absorbing cavity, the conical reflective surface 152a can reflect sound waves multiple times. Each reflection provides an opportunity for the sound wave to come into contact with the sound-absorbing material. Therefore, the sound-absorbing interlayer can be used to further absorb the sound waves, thereby increasing the possibility of sound wave energy being converted into heat energy or other forms of energy, and improving the sound wave absorption efficiency.

[0051] In related technologies, when using the pressure stabilizing device 10 to control air pressure, the controller 14 typically employs a negative feedback mechanism. That is, after obtaining the current pressure value in the gas buffer tank 11 from the pressure sensor 12 and the target pressure value set by the user, the controller 14 calculates the difference between the two and controls the opening of the pressure regulating valve 13 based on this difference. When the pressure sensor 12 detects that the pressure in the gas buffer tank 11 has reached the target pressure value, the pressure regulating valve 13 is then closed. Since closing the pressure regulating valve 13 requires a certain amount of time, the pressure in the gas buffer tank 11 may continue to rise or fall during the closing process, causing the actual pressure value to deviate from the user-set target pressure value, thus reducing the pressure control accuracy.

[0052] For example, suppose the user sets a target pressure of 100 kPa and the current pressure is 50 kPa. In this case, the controller 14 will open the intake valve 131, allowing gas from the supply end 20 to enter the gas buffer tank 11. The pressure in the gas buffer tank 11 will increase. When the pressure sensor 12 detects that the pressure in the gas buffer tank 11 has risen to 100 kPa, it will notify the controller 14, which will then close the intake valve 131. However, there is a certain time between triggering the closure of the intake valve 131 and its complete closure. During this process, some gas may still enter the gas buffer tank 11, causing the pressure inside to continue to rise, for example, potentially reaching 110 kPa. This results in a deviation between the actual pressure value and the target pressure value. For low-pressure control scenarios such as 3D printing, this deviation has a more significant impact on pressure control accuracy.

[0053] To avoid the above problems and achieve more precise pressure control, in some embodiments, the pressure control algorithm can be improved. That is, considering that the pressure in the gas buffer tank 11 will still change to a certain extent (i.e., rise or fall) from the time the pressure regulating valve 13 is triggered to close until it is completely closed, the pressure change value in the gas buffer tank 11 during the closing process of the pressure regulating valve 13 can be predicted. Based on this pressure change value, the closing time of the pressure regulating valve 13 can be determined, so that the pressure value detected by the pressure sensor 12 when the pressure regulating valve 13 is triggered to close and the cumulative value of the pressure change value are exactly equal to the target pressure value.

[0054] For example, controller 14 can first control the opening of pressure regulating valve 13 based on the difference between the target pressure value and the current pressure value. Furthermore, controller 14 can predict the pressure change value within gas buffer tank 11 during the closing process of pressure regulating valve 13. For instance, controller 14 can determine the intake or exhaust volume within gas buffer tank 11 per unit time based on the opening degree of pressure regulating valve 13. Then, it can predict the duration required from triggering the closing of pressure regulating valve 13 to its complete closure. Furthermore, it can determine the total intake or exhaust volume of gas buffer tank 11 during this closing process and predict the pressure change value caused by this intake or exhaust volume. After determining the aforementioned pressure change value, the closing timing of pressure regulating valve 13 can be determined based on this pressure change value. This closing timing ensures that after closing pressure regulating valve 13, the sum of the pressure value detected at the closing moment of intake valve 131 or exhaust valve 132 and the pressure change value equals the target pressure value. Then, pressure regulating valve 13 can be closed based on this closing timing.

[0055] The closing timing can be indicated by the opening duration of the pressure regulating valve 13 or by the pressure value currently detected by the pressure sensor 12. For example, the closing timing can be that the pressure regulating valve 13 is closed after the opening duration reaches a preset duration. Alternatively, the pressure regulating valve 13 can be closed when the pressure value currently detected by the pressure sensor 12 is a specified pressure value.

[0056] In some embodiments, when predicting the pressure change in the gas buffer tank 11 during the closing process of the pressure regulating valve 13, the prediction can be based on one or more of the following parameters: the current opening degree of the pressure regulating valve 13 (the degree of opening of the inlet valve 131 or the exhaust valve 132), the relevant characteristics of the gas source, the volume of the gas buffer tank 11, the signal transmission duration between the controller 14 and the pressure sensor 12, etc. The current opening degree of the pressure regulating valve 13 can affect the amount of gas entering or exiting the gas buffer tank 11 per unit time. The signal transmission duration between the controller 14 and the pressure sensor 12 affects the overall closing process time, while the characteristics of the gas source and the volume of the gas buffer tank 11 affect the pressure change caused by the gas.

[0057] For example, assuming the user-set target pressure is 100 kPa and the current pressure is 50 kPa, the intake valve 131 can be opened, allowing gas from the supply end 20 to enter the gas buffer tank 11, increasing the pressure in the gas buffer tank 11. Simultaneously, based on parameters such as the current opening degree of the intake valve 131, the characteristics of the gas source, and the volume of the gas buffer tank 11, it can be predicted how much the pressure in the gas buffer tank 11 will increase from the moment the intake valve 131 is triggered to close until it is completely closed. For instance, assuming the predicted value is 10 kPa, the intake valve 131 can be closed when the pressure sensor 12 detects a current pressure of 90 kPa in the gas buffer tank 11, resulting in a final pressure of 100 kPa in the gas buffer tank 11.

[0058] The same applies to scenarios where the target pressure is greater than the current pressure. For example, assuming the user-set target pressure is 20 kPa and the current pressure is 50 kPa, the exhaust valve 132 can be opened to release gas from the gas buffer tank 11, causing the pressure in the gas buffer tank 11 to decrease. Simultaneously, based on parameters such as the current opening degree of the exhaust valve 132, the characteristics of the gas source, and the volume of the gas buffer tank 11, it can be predicted how much the pressure inside the gas buffer tank 11 will decrease from the moment the exhaust valve 132 is triggered to close until it is completely closed. For example, assuming the predicted value is 10 kPa, the exhaust valve 132 can be closed when the pressure sensor 12 detects a current pressure of 30 kPa in the gas buffer tank 11, resulting in a final pressure of 20 kPa in the gas buffer tank 11.

[0059] In this embodiment, the pressure change in the gas buffer tank 11 is predicted from the time the intake valve 131 or exhaust valve 132 is triggered to close until the intake valve 131 or exhaust valve 132 is completely closed. Then, the closing time is determined based on the pressure change value, so that the sum of the real-time pressure value in the gas buffer tank 11 at the closing time and the pressure change value is equal to the target pressure value. This allows the pressure to be controlled more accurately near the target pressure value set by the user, achieving precise pressure control.

[0060] In related technologies, when controlling the opening of the intake valve 131 or exhaust valve 132, the opening degree of the intake valve 131 or exhaust valve 132 is usually set to the maximum, which causes the gas pressure in the gas buffer tank 11 to rise or fall rapidly in a short period of time, which is not conducive to precise pressure control. In order to achieve precise pressure control, in some embodiments, the opening degree of the intake valve 131 or exhaust valve 132 can be dynamically adjusted based on the difference between the target pressure value and the current pressure value. For example, the greater the difference between the two, the greater the opening degree of the intake valve 131 or exhaust valve 132, and vice versa.

[0061] Furthermore, this application embodiment also provides a pressure control method applicable to a pressure stabilizing device 10. The pressure stabilizing device 10 can be an existing pressure stabilizing device 10 or the pressure stabilizing device 10 mentioned in the above embodiments. For example, the pressure stabilizing device 10 may include a controller 14, a gas buffer tank 11, a pressure sensor 12 disposed within the gas buffer tank 11, and a pressure regulating valve 13. The controller 14 is communicatively connected to the pressure sensor 12 and the pressure regulating valve 13, respectively. The method can be executed by the controller 14, such as... Figure 7 As shown, the method may include the following steps:

[0062] S702, Obtain the target pressure value set by the user and the current pressure value detected by the pressure sensor 12;

[0063] S704. Based on the difference between the target pressure value and the current pressure value, control the opening of the air pressure regulating valve 13;

[0064] S706. Predict the change in gas pressure in the gas buffer tank 11 during the closing of the gas pressure regulating valve 13;

[0065] S708. Determine the closing timing of the pressure regulating valve 13 based on the pressure change value; the closing timing is such that the sum of the pressure value inside the gas buffer tank 11 detected at the closing time of the pressure regulating valve 13 and the pressure change value is the target pressure value.

[0066] S710. Close the air pressure regulating valve 13 based on the closing timing.

[0067] In some embodiments, the pressure change value is predicted based on one or more of the following parameters: the current opening degree of the pressure regulating valve 13, the relevant characteristics of the gas source, the volume of the gas buffer tank 11, and the signal transmission duration between the pressure sensor 12 and the controller 14.

[0068] In some embodiments, the greater the difference between the target pressure value and the current pressure value, the greater the opening degree of the pressure regulating valve 13.

[0069] The specific control process of the above-mentioned air pressure control method can be referred to the description of each embodiment of the above-mentioned air pressure stabilizing device 10, and will not be repeated here.

[0070] In addition, this application embodiment also provides a muffler 15, which is used to silence the gas discharged by the exhaust device. The muffler 15 includes an air inlet 151, a first sound-absorbing cavity 152, a second sound-absorbing cavity 153, and a gas flow channel 154 that communicates with the air inlet 151 and passes through the first sound-absorbing cavity 152 and the second sound-absorbing cavity 153.

[0071] The first sound-absorbing cavity 152 is provided with a plurality of conical reflective surfaces 152a, which are arranged at intervals along the gas flow channel 154. Each conical reflective surface 152a has an opening 152b at its top, which is located near the air inlet 151 and is used to form a part of the gas flow channel 154.

[0072] The second sound-absorbing cavity 153 is provided with a plurality of exhaust holes 153a;

[0073] The gas discharged from the exhaust device enters the first sound-absorbing cavity 152 through the air inlet 151, and after being reflected sequentially by multiple conical reflective surfaces 152a in the first sound-absorbing cavity 152, it enters the second sound-absorbing cavity 153 along the gas flow channel 154, and is dispersed and discharged from multiple exhaust holes 153a on the second sound-absorbing cavity 153.

[0074] In some embodiments, the first sound-absorbing cavity 152 and the second sound-absorbing cavity 153 are further provided with porous sound-absorbing material.

[0075] The specific structure and function of the silencer 15 can be referred to the descriptions of the various embodiments of the pressure stabilizing device 10 described above, and will not be repeated here.

[0076] In addition, this application embodiment also provides a pneumatic pressure stabilizing device, which includes a silencer for silencing the gas discharged from the pneumatic pressure stabilizing device. The silencer includes an air inlet, a first sound-absorbing cavity, a second sound-absorbing cavity, and a gas flow channel that communicates with the air inlet and passes through the first sound-absorbing cavity and the second sound-absorbing cavity.

[0077] The first sound-absorbing cavity is provided with a plurality of conical reflective surfaces, which are arranged at intervals along the gas flow channel. Each conical reflective surface has an opening at its top, which is located near the air inlet and is used to form part of the gas flow channel.

[0078] The second sound-absorbing cavity is provided with multiple exhaust holes;

[0079] The gas discharged from the exhaust device enters the first sound absorption cavity through the air inlet, is reflected sequentially by multiple conical reflective surfaces in the first sound absorption cavity, enters the second sound absorption cavity along the gas flow channel, and is dispersed and discharged from multiple exhaust holes on the second sound absorption cavity.

[0080] The specific structure and function of the air pressure stabilizing device can be referred to the descriptions of the above embodiments, and will not be repeated here.

[0081] The solutions in the above embodiments can be freely combined to obtain new solutions when there is no conflict. Due to space limitations, they will not be listed one by one here.

[0082] Furthermore, embodiments of this application also provide a computer program product, which includes a computer program that, when executed by a processor, implements the method described in any of the above-mentioned embodiments.

[0083] Accordingly, this application also provides a computer storage medium storing a program that, when executed by a processor, implements the method in any of the above embodiments.

[0084] The embodiments of this application may take the form of a computer program product implemented on one or more storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing program code. Computer-usable storage media include permanent and non-permanent, removable and non-removable media, and information storage can be implemented by any method or technology. Information may be computer-readable instructions, data structures, program modules, or other data. Examples of computer storage media include, but are not limited to: phase-change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technologies, read-only optical discs, read-only memory (CD-ROM), digital versatile optical discs (DVD) or other optical storage, magnetic tape, disks or other magnetic storage devices, or any other non-transfer medium that can be used to store information accessible by a computing device.

[0085] For the device embodiments, since they basically correspond to the method embodiments, the relevant parts can be referred to in the description of the method embodiments. The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without creative effort.

[0086] The user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, data stored, data displayed, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties. Furthermore, the collection, use and processing of the relevant data must comply with the relevant laws, regulations and standards of the relevant countries and regions, and corresponding operation entry points are provided for users to choose to authorize or refuse.

[0087] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. The terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0088] The methods and apparatus provided in the embodiments of this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The descriptions of the embodiments above are only for the purpose of helping to understand the methods and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this application should not be construed as a limitation of this application.

Claims

1. A pneumatic pressure stabilizing device, characterized in that, The pressure stabilizing device includes a gas buffer tank, a pressure sensor disposed inside the gas buffer tank, a pressure regulating valve, and a controller. The controller is communicatively connected to the pressure sensor and the pressure regulating valve. The pressure regulating valve includes an inlet valve and an outlet valve. The gas buffer tank includes an inlet port, an outlet port, and a supply port. The inlet port is connected to the inlet valve, the outlet port is connected to the outlet valve, and the supply port is connected to the gas user. The pressure sensor is used to detect the current pressure value in the gas buffer tank and send it to the controller; The controller is used to acquire the target pressure value set by the user, and control the opening and closing state of the pressure regulating valve based on the difference between the target pressure value and the current pressure value, so that the pressure value output by the gas buffer tank to the gas user is the target pressure value. The volume of the gas buffer tank can be automatically adjusted based on the pressure value inside the gas buffer tank, so that the gas pressure output from the gas buffer tank to the gas user is stabilized at the target pressure value. The gas buffer tank is made of flexible material.

2. The pneumatic pressure stabilizing device according to claim 1, characterized in that, The air inlet, the air outlet, and the air supply outlet are located at the top of the gas buffer tank. A retractable structure is provided between the top and bottom of the gas buffer tank. The retractable structure can automatically expand and contract based on pressure changes within the gas buffer tank to adjust the volume of the gas buffer tank.

3. The pneumatic pressure stabilizing device according to claim 2, characterized in that, The bottom of the gas buffer tank is an elastic diaphragm, which can automatically expand outward or contract inward based on pressure changes inside the gas buffer tank to adjust the volume of the gas buffer tank.

4. The pneumatic pressure stabilizing device according to any one of claims 1-3, characterized in that, The gas buffer tank is made of a flexible material; and / or The gas buffer tank is made of TPU and is integrally formed using 3D printing technology.

5. The pneumatic pressure stabilizing device according to claim 1, characterized in that, The air pressure stabilizing device also includes a muffler, which is connected to the exhaust valve and is used to silence the gas discharged from the exhaust valve. The muffler includes an air inlet, a first sound-absorbing chamber, a second sound-absorbing chamber, and a gas flow channel that communicates with the air inlet and passes through the first sound-absorbing chamber and the second sound-absorbing chamber. The first sound-absorbing cavity is provided with a plurality of conical reflective surfaces, which are arranged at intervals along the gas flow channel. Each conical reflective surface has an opening at its top, which is located near the air inlet and is used to form part of the gas flow channel. The second sound-absorbing cavity is provided with multiple exhaust holes; The gas discharged from the exhaust valve enters the first sound-absorbing cavity through the air inlet, is reflected sequentially by multiple conical reflective surfaces in the first sound-absorbing cavity, enters the second sound-absorbing cavity along the gas flow channel, and is dispersed and discharged from multiple exhaust holes on the second sound-absorbing cavity.

6. The pneumatic pressure stabilizing device according to claim 5, characterized in that, The first and second sound-absorbing cavities are also provided with porous sound-absorbing material.

7. The pneumatic pressure stabilizing device according to claim 1, characterized in that, The controller is used to control the opening and closing state of the pressure regulating valve based on the difference between the target pressure value and the current pressure value, so that when the pressure output from the gas buffer tank to the gas user is the target pressure value, it is specifically used for: The pressure regulating valve is opened based on the difference between the target pressure value and the current pressure value. Predict the pressure change in the gas buffer tank during the closing of the pressure regulating valve; The timing for closing the pressure regulating valve is determined based on the pressure change value, and the closing timing is such that the sum of the pressure value inside the gas buffer tank detected at the closing time of the pressure regulating valve and the pressure change value is the target pressure value. The pressure regulating valve is closed based on the specified closing timing.

8. The pneumatic pressure stabilizing device according to claim 7, characterized in that, The pressure change value is predicted based on one or more of the following parameters: the current opening degree of the pressure regulating valve, the relevant characteristics of the gas source, the volume of the gas buffer tank, and the signal transmission duration between the pressure sensor and the controller. and / or The greater the difference between the target pressure value and the current pressure value, the greater the opening degree of the pressure regulating valve.

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