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

Abstract

The embodiment of the invention provides an air pressure stabilizing device, an air pressure control method and a computer program product. When the air pressure stabilizing device is designed, the air buffer tank of the air pressure stabilizing device is designed into the volume-variable air cavity, so that the volume of the air buffer tank can be dynamically adjusted based on the current pressure value, and when the pressure in the air buffer tank is increased, the volume of the air buffer tank can be increased, so that the influence of pressure rise can be relieved. On the contrary, when the pressure in the gas buffer tank is reduced, the volume of the gas buffer tank can be reduced, and the pressure of the gas buffer tank can be supplemented, so that the pressure value of the gas output to the gas using end by the gas buffer tank is stabilized near the target pressure value, violent fluctuation is avoided, and the pressure control precision of the gas pressure stabilizing device can be improved; and accurate voltage control can be realized in a low-voltage control scene.

Description

Technical Field

[0001] The present application relates to the technical field of pneumatic control, and more particularly, to a pneumatic pressure stabilizing device, a pneumatic control method, and a computer program product. Background Art

[0002] Pneumatic pressure stabilizing devices are widely used in various fields. However, for some low-pressure control scenarios, existing pneumatic pressure stabilizing devices often cannot achieve precise pressure control and cannot meet the requirements for pressure control accuracy in such scenarios. For example, in the case of pneumatic 3D printing, the pressure required in the 3D printing scenario is often low. During the process of using an existing pneumatic pressure stabilizing device for pressure control, the air source pressure output by the pneumatic pressure stabilizing device to the gas-using end often fluctuates greatly, resulting in key quality problems such as poor interface fusion and inaccurate functional gradient distribution when functional materials with complex rheological properties (such as highly thixotropic photosensitive resin, high-solid-content ceramic paste) are laminated and formed. Therefore, for low-pressure control scenarios, there is an urgent need for a pneumatic pressure stabilizing device that can achieve precise pressure control. Summary of the Invention

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

[0004] According to a first aspect of the present application, there is provided a pneumatic pressure stabilizing device, which includes a gas buffer tank, a pressure sensor disposed in the gas buffer tank, a pneumatic control valve, and a controller. The controller is communicatively connected to the pressure sensor and the pneumatic control valve respectively. The pneumatic control valve includes an intake valve and an exhaust valve. The gas buffer tank includes an intake port, an exhaust port, and a supply port. The intake port is communicated with the intake valve, the exhaust port is communicated with the exhaust valve, and the supply port is communicated with the gas-using end.

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

[0006] The controller is configured to obtain the target pressure value set by the user, and control the opening and closing state of the pneumatic control valve based on the difference between the target pressure value and the current pressure value, so that the air pressure value output by the gas buffer tank to the gas-using end is the target pressure value.

[0007] Wherein, the volume of the gas buffer tank can be automatically adjusted based on the pressure value in the gas buffer tank, so that the air pressure output by the gas buffer tank to the gas-using end is stabilized at the target pressure value.

[0008] According to a second aspect of the present application, a pneumatic control method is provided. The method is applicable to a pneumatic pressure stabilizing device, which includes a controller, a gas buffer tank, a pressure sensor disposed in the gas buffer tank, and a pneumatic control valve. The controller is communicatively connected to the pressure sensor and the pneumatic control valve respectively. The method is executed by the controller and includes:

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

[0010] Control the opening of the pneumatic control valve based on the difference between the target pressure value and the current pressure value;

[0011] Predict the pneumatic pressure change value in the gas buffer tank during the closing process of the pneumatic control valve;

[0012] Determine the closing timing of the pneumatic control valve based on the pneumatic pressure change value. The closing timing is such that the pressure value in the gas buffer tank detected at the closing moment of the pneumatic control valve and the cumulative value of the pneumatic pressure change value are the target pressure value;

[0013] Close the pneumatic control valve based on the closing timing.

[0014] According to a third aspect of the present application, a muffler is provided. The muffler is used to muffler the gas discharged from an exhaust device. The muffler includes an air inlet hole, a first sound absorption chamber, a second sound absorption chamber, and a gas flow passage that is communicated with the air inlet hole and penetrates through the first sound absorption chamber and the second sound absorption chamber;

[0015] A plurality of conical reflection surfaces are provided in the first sound absorption chamber. The plurality of conical reflection surfaces are arranged at intervals along the gas flow passage. Among them, an opening is provided at the top of each conical reflection surface, and the opening is located on the side close to the air inlet hole. The opening is used to form a part of the gas flow passage;

[0016] A plurality of exhaust holes are provided on the cavity of the second sound absorption chamber;

[0017] The gas discharged from the exhaust device enters the first sound absorption chamber through the air inlet hole, is sequentially reflected by the plurality of conical reflection surfaces in the first sound absorption chamber, then enters the second sound absorption chamber along the gas flow passage, and is dispersed and discharged from the plurality of exhaust holes on the second sound absorption chamber.

[0018] According to a fourth aspect of the present application, a computer program product is provided. The computer program product includes a computer program, and when the computer program is executed, it implements the method mentioned in the second aspect above.

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

[0020] Applying the solution provided by the present application, when designing a pneumatic pressure stabilizing device, by designing the gas buffer tank of the pneumatic pressure stabilizing device into a gas chamber with variable volume, the gas buffer tank can dynamically adjust its volume based on the current pressure value. When the pressure in the gas buffer tank increases, the volume of the gas buffer tank can be increased, thereby reducing the impact of the pressure increase. On the contrary, when the pressure in the gas buffer tank decreases, the volume of the gas buffer tank can be reduced to supplement the pressure of the gas buffer tank, so that the pressure value of the gas output from the gas buffer tank to the gas-using end is stabilized near the target pressure value, without significant fluctuations, and thus the pressure control accuracy of the pneumatic pressure stabilizing device can be improved, enabling precise pressure control even in low-pressure control scenarios.

[0021] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

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

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

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

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

[0027] Figure 5 is a schematic structural diagram of a silencer according to another embodiment of the present application.

[0028] Figure 6 is a cross-sectional view of a silencer according to another embodiment of the present application.

[0029] Figure 7 is a flowchart of a pneumatic pressure control method according to another embodiment of the present application. Detailed implementation manners

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present application.

[0031] In scenarios with low-pressure control such as 3D printing, the pressure control accuracy of existing air pressure stabilizing devices is often relatively low, resulting in relatively large fluctuations in the air pressure output to the gas-using end, and unable to meet the requirements for pressure control accuracy in such scenarios.

[0032] After research and analysis by the applicant, it is found that the reasons for the low pressure control accuracy of existing air pressure stabilizing devices in low-pressure scenarios are as follows: Considering factors such as safety and durability, the gas buffer tanks of existing air pressure stabilizing devices generally use rigid buffer tanks. In low-pressure control scenarios, the gas in the gas buffer tank is often less, and there are certain limitations on the minimum opening degree of the air pressure regulating valves (intake valve or exhaust valve) connected to the gas buffer tank, and it cannot be made particularly small. That is, the gas throughput of the intake valve and the exhaust valve may be relatively large, which may cause the gas volume in the gas buffer tank to suddenly increase or decrease, and then cause violent fluctuations in the gas source pressure output from the gas buffer tank to the gas-using end, affecting the pressure control accuracy.

[0033] Based on this, the applicant has designed an air pressure stabilizing device aimed at improving the air pressure control accuracy in low-pressure control scenarios. As Figure 1 shown, it is a schematic structural diagram of the air pressure stabilizing device 10 provided in the embodiment of the present application. The air pressure stabilizing device 10 includes a gas buffer tank 11, a pressure sensor 12, an air pressure regulating valve 13, and a controller 14. The pressure sensor 12 can be arranged in the gas buffer tank 11 to detect the current air pressure value of the gas buffer tank 11 in real time. The air pressure regulating valve 13 can include an intake valve 131 for controlling the gas volume entering the gas buffer tank 11 and an exhaust valve 132 for controlling the gas volume discharged from the gas buffer tank 11. The gas buffer tank 11 can include an intake port 121, an exhaust port 122, and a gas supply port 123. Among them, the intake port 121 can be communicated with the intake valve 131. When the intake valve 131 is opened, the gas provided by the gas supply end 20 (for example, an air compressor) can enter the gas buffer tank 11 through the intake port 121 to increase the air pressure in the gas buffer tank 11. The exhaust port 122 can be communicated with the exhaust valve 132. When the exhaust valve 132 is opened, the gas in the gas buffer tank 11 can be discharged through the exhaust port 122 to reduce the air pressure in the gas buffer tank 11. The gas supply port 123 is used to communicate with the gas-using end 30 to output a certain pressure of gas source to the gas-using end 30 to achieve pressure control.

[0034] The controller 14 is communicatively connected to the pressure sensor 12 and the pneumatic pressure regulating valve 13 respectively. Specifically, the connection method can be a wired connection or a wireless connection, and the embodiments of the present application do not limit it.

[0035] The pressure sensor 12 is used to detect the current pressure value in the gas buffer tank 11 and send it to the controller 14. The controller 14 can be used to obtain the target pressure value set by the user. In some scenarios, the pneumatic pressure stabilizing device 10 can be integrated with a display screen to provide a user interaction interface through which the user can input the target pressure value based on the requirements of the gas using end 30. In some scenarios, the controller 14 of the pneumatic pressure stabilizing device 10 can also be directly connected to other devices with an interaction interface, such as a user's computer or mobile phone, etc., so that the user can input the target pressure value through the interaction interface provided by the other device.

[0036] After the controller 14 obtains the current pressure value sent by the pressure sensor 1 and the target pressure value set by the user, it can control the opening and closing state of the pneumatic pressure regulating valve 13 based on the difference between the two to adjust the air pressure in the gas buffer tank 11, so that the air pressure value output from the gas buffer tank 11 to the gas using end 30 through the air supply port 123 is the target pressure value. For example, if the current pressure value is less than the target pressure value, the intake valve 131 is opened so that the gas from the gas supply end 20 enters the gas buffer tank 11 to increase the air 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 so that the gas in the gas buffer tank 11 is discharged to reduce the air pressure in the gas buffer tank 11.

[0037] To reduce the fluctuation of the air pressure output from the gas buffer tank 11, the gas buffer tank 11 can be designed as an air chamber with a variable volume, that is, the volume of the gas buffer tank 11 can be automatically adjusted based on the pressure value in the gas buffer tank 11. For example, if the gas volume in the gas buffer tank 11 suddenly increases sharply, that is, the air pressure in the gas buffer tank 11 suddenly increases, the volume of the gas buffer tank 11 can also be automatically increased, so as to ensure that the air source pressure output from the gas buffer tank 11 to the gas using end 30 remains stable. Similarly, if the gas volume in the gas buffer tank 11 suddenly decreases, that is, the air pressure in the gas buffer tank 11 suddenly decreases, the volume of the gas buffer tank 11 can also be automatically reduced, so as to ensure that the air source pressure output from the gas buffer tank 11 to the gas using end 30 remains stable without significant fluctuations. That is, by designing the gas buffer tank 11 as an air chamber with a variable volume, 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 from the gas buffer tank 11 to the gas using end 30 is stabilized near the target pressure value without significant fluctuations.

[0038] In some embodiments, the air pressure stabilizing device 10 in the embodiments of the present application can be modularized, that is, each component of the air pressure stabilizing device 10 can select components with some common or standard interfaces to facilitate the replacement of a certain component. For example, taking the air pressure stabilizing device 10 for 3D printing scenarios as an example, small standardized pressure sensors 12, electronically controlled proportional intake valves 131, and exhaust valves 132 can be selected. The pressure sensor 12 uses high-precision analog transmission, and the electronically controlled proportional intake valve 131 and exhaust valve 132 are controlled using standard air pipe interface components and general control signals. Thus, different models of valves and sensors can be replaced to adapt to different pressure range requirements. And all components (including the controller 14, gas buffer tank 11, electronically controlled proportional intake valve 131, sensor, power supply, etc.) can be integrated in a housing with a controllable volume to meet the integration requirements of different types of instruments. In some embodiments, as Figure 2 shown, the above-mentioned intake port 121, exhaust port 122, and air supply port 123 can be arranged at the top of the gas buffer tank 11. A telescopic structure 114 is provided between the top and bottom of the gas buffer tank 11. Among them, the telescopic structure 114 can automatically expand and contract based on the current pressure value in the gas buffer tank 11 to adjust the volume of the gas buffer tank 11. For example, when the pressure in the gas buffer tank 11 is small, the telescopic structure 114 can be in a contracted state, so that the volume of the entire gas buffer tank 11 is small. When the pressure in the gas buffer tank 11 increases, the telescopic structure 114 can be in an extended state, that is, the overall length of the gas buffer tank 11 becomes longer, so that the volume of the entire gas buffer tank 11 increases.

[0039] In some embodiments, as Figure 3 shown, the bottom of the gas buffer tank 11 is an elastic diaphragm 115. The elastic diaphragm 115 can automatically expand outward or contract inward based on the pressure change in the gas buffer tank 11 to adjust the volume of the gas buffer tank 11. For example, the elastic diaphragm 115 is a structure with elasticity. When the pressure in the gas buffer tank 11 increases, the elastic diaphragm 115 expands outward, increasing the volume of the gas buffer tank 11, so as to absorb excess gas and reduce the impact of the pressure increase. On the contrary, when the pressure in the gas buffer tank 11 decreases, the elastic diaphragm 115 can contract inward, reducing the volume of the gas buffer tank 11 and releasing the stored gas to supplement the pressure in the gas buffer tank 11.

[0040] By adopting the combined design of the scalable structure 114 and the elastic diaphragm 115, the gas buffer tank 11 can adapt to different pressure ranges. This ability to dynamically adjust the volume enables the gas buffer tank 11 to respond quickly when the pressure rises or falls, thereby keeping the pressure output by the gas buffer tank 11 to the gas-using end 30 stable, avoiding violent fluctuations in the output pressure, improving the pressure control accuracy, and enabling the air pressure stabilizing device 10 to maintain the air pressure output to the user's gas end more precisely at the target pressure value set by the user.

[0041] In some embodiments, the gas buffer tank 11 can be prepared from flexible materials. For example, it can be prepared from TPU, rubber, or similar elastic materials.

[0042] In some embodiments, the gas buffer tank 11 can be integrally formed by 3D printing. For example, the scalable 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. Among them, in order to facilitate the preparation by 3D printing, the material of the gas buffer tank 11 can be selected as TPU.

[0043] In some embodiments, considering that the exhaust valve 132 of the air pressure stabilizing device 10 will generate relatively large noise during the exhaust process, which will cause certain interference to the user. In order to reduce the noise generated during the exhaust process, as Figure 4 shown, the air pressure stabilizing device 10 can further include a muffler 15, which is connected to the exhaust valve 132 and is used for silencing the gas discharged by the exhaust valve 132.

[0044] In some embodiments, the muffler 15 can adopt some commercially available mufflers 15.

[0045] In some embodiments, in order to further improve the effect of the muffler 15, the applicant designed a new muffler 15 based on the usage scenario and characteristics of the air pressure stabilizer. As Figure 5 shown and Figure 6As shown, the silencer 15 includes an air inlet hole 151, a first sound absorption cavity 152, a second sound absorption cavity 153, and a gas flow passage 154 that communicates with the air inlet hole 151 and penetrates through the first sound absorption cavity 152 and the second sound absorption cavity 153. The air inlet hole 151 communicates with the exhaust valve 132, and the gas discharged from the exhaust valve 132 can enter the silencer 15 through the air inlet hole 151. A plurality of conical reflecting surfaces 152a are provided in the first sound absorption cavity 152, and the plurality of conical reflecting surfaces 152a are arranged at intervals along the gas flow passage 154. Among them, an opening 152b is provided at the top of each conical reflecting surface 152a, and the opening 152b is located on the side close to the air inlet hole 151. The opening 152b is used to form a part of the gas flow passage 154, that is, the gas can flow into the second sound absorption cavity 153 along the openings 152b of the respective conical reflecting surfaces 152a.

[0046] A plurality of exhaust holes 153a are provided on the cavity of the second sound absorption cavity 153 for dispersedly discharging the gas processed by the first sound absorption cavity 152.

[0047] The gas discharged from the exhaust valve 132 enters the first sound absorption cavity 152 through the air inlet hole 151. After being sequentially reflected by the plurality of conical reflecting surfaces 152a in the first sound absorption cavity 152, it enters the second sound absorption cavity 153 along the gas flow passage 154 and is dispersedly discharged from the plurality of exhaust holes 153a on the second sound absorption cavity 153.

[0048] By providing the conical reflecting surfaces 152a in the first sound absorption cavity 152, multiple reflections and absorptions of sound waves inside the silencer 15 can be promoted. The sound waves will be reflected multiple times during the propagation process, which increases the propagation path length of the sound waves inside the silencer 15. The longer propagation path helps to more effectively absorb and weaken the sound wave energy. At the same time, the sound waves will be dispersed in different directions during the propagation process, and this dispersion effect helps to reduce the intensity of the sound waves in a specific direction, thereby reducing the radiation of noise. The conical reflecting surfaces 152a not only affect the propagation of sound waves but also have an impact on the gas flow characteristics. By guiding the gas flow, the conical reflecting surfaces 152a help to reduce the turbulence and eddy currents generated by the gas flow, and these flow characteristics are often related to noise generation. By optimizing the gas flow, the noise can also be further reduced.

[0049] In addition, by providing a plurality of exhaust holes 153a in the second sound absorption cavity 153, the gas can be dispersed when discharged, thereby reducing the noise generated during exhaust. This way of dispersed exhaust helps to reduce the air flow velocity during exhaust, reduce the impact of the air flow on the surrounding environment, and further reduce the noise.

[0050] In some embodiments, porous sound-absorbing materials are further provided in the first sound-absorbing cavity 152 and the second sound-absorbing cavity 153. The porous sound-absorbing materials can be some materials with sound-absorbing functions, such as aerogel coatings, sound-absorbing cotton, etc. By designing the conical reflecting surface 152a and arranging sound-absorbing materials in the sound-absorbing cavity at the same time, since the conical reflecting surface 152a can reflect sound waves multiple times, and each reflection provides an opportunity for the sound waves to contact the sound-absorbing materials. Furthermore, the sound-absorbing sandwich layer can be used to further absorb the sound waves, thereby increasing the possibility of converting sound wave energy into heat energy or other forms of energy and improving the sound wave absorption efficiency.

[0051] In the related art, when using the air pressure stabilizing device 10 to control the air pressure, the pressure control method of the controller 14 usually adopts a negative feedback mechanism. That is, after the controller 14 obtains the current pressure value in the gas buffer tank 11 and the target pressure value set by the user from the pressure sensor 12, it can calculate the difference between the two, and based on the difference, control the air pressure regulating valve 13 to open. When the pressure sensor 12 detects that the pressure in the gas buffer tank 11 reaches the target pressure value, the air pressure regulating valve 13 is then closed. Since it takes a certain amount of time to close the air pressure regulating valve 13, this will cause the pressure in the gas buffer tank 11 to continue to rise or fall during the process of closing the air pressure regulating valve 13, resulting in the actual pressure value deviating from the target pressure value set by the user and reducing the pressure control accuracy.

[0052] For example, assume that the target pressure value set by the user is 100 KP and the current pressure value is 50 KP. At this time, the controller 14 will control the intake valve 131 to open, so that the gas from the gas supply end 20 will enter the gas buffer tank 11, and the pressure of the gas buffer tank 11 will increase. When the pressure sensor 12 detects that the pressure of the gas buffer tank 11 has increased to 100 KP, it will notify the controller 14. At this time, the controller 14 will control the intake valve 131 to close. There is still a certain amount of time required from triggering the intake valve 131 to close until it is completely closed, resulting in gas still entering the gas buffer tank 11 during this process, and the pressure in the gas buffer tank 11 will continue to rise. For example, it may rise to 110 KP, thus causing a deviation between the actual pressure value and the target pressure value. For scenarios with low-pressure control such as 3D printing, the impact of this deviation on the pressure control accuracy is more significant.

[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 during the process from triggering the closing of the pneumatic pressure regulating valve 13 to completely closing the pneumatic pressure regulating valve 13, the air pressure in the gas buffer tank 11 will still change to a certain extent (i.e., increase or decrease). Therefore, the change value of the air pressure in the gas buffer tank 11 during the closing process of the pneumatic pressure regulating valve 13 can be predicted, and based on this air pressure change value, the closing timing of the pneumatic pressure regulating valve 13 can be determined, so that the pressure value detected by the pressure sensor 12 when triggering the closing of the pneumatic pressure regulating valve 13 and the cumulative value of this air pressure change value are exactly equal to the target pressure value.

[0054] For example, the controller 14 can first control the opening of the pneumatic pressure regulating valve 13 based on the difference between the target pressure value and the current pressure value. And the controller 14 can predict the change value of the air pressure in the gas buffer tank 11 during the closing process of the pneumatic pressure regulating valve 13. For example, the controller 14 can determine the air intake or exhaust volume in the gas buffer tank 11 per unit time based on the opening degree of the pneumatic pressure regulating valve 13, and then can predict the duration required for the entire process from triggering the closing of the pneumatic pressure regulating valve 13 to completely closing the pneumatic pressure regulating valve 13. Furthermore, the total air intake or exhaust volume in the gas buffer tank 11 during this closing process can be determined, and the change value of the air pressure caused by this air intake or exhaust volume can be predicted. After determining the above air pressure change value, the closing timing of the pneumatic pressure regulating valve 13 can be determined based on this air pressure change value. Among them, this closing timing makes the pressure value detected at the closing moment of the intake valve 131 or the exhaust valve 132 after closing the pneumatic pressure regulating valve 13 and the cumulative value of this air pressure change value be the target pressure value, and then the pneumatic pressure regulating valve 13 can be closed based on this closing timing.

[0055] Among them, this closing timing can be represented by the opening duration of the pneumatic pressure regulating valve 13, or can also be represented by the pressure value currently detected by the pressure sensor 12. For example, this closing timing can be to control the closing of the pneumatic pressure regulating valve 13 after the opening duration of the pneumatic pressure regulating valve 13 reaches a preset duration. It can also be to control the closing of the pneumatic pressure regulating valve 13 when the pressure value currently detected by the pressure sensor 12 is a specified pressure value.

[0056] In some embodiments, when predicting the air pressure change value in the gas buffer tank 11 during the closing process of the pneumatic pressure regulating valve 13, it can be determined based on one or more of the following parameters: the current opening degree of the pneumatic pressure regulating valve 13 (the opening degree of the intake valve 131 or the exhaust valve 132), the relevant characteristics of the air source, the volume of the gas buffer tank 11, the signal transmission duration between the controller 14 and the pressure sensor 12, and so on. Among them, the current opening degree of the pneumatic pressure regulating valve 13 can affect the amount of gas entering the gas buffer tank 11 per unit time or the amount of gas discharged from the gas buffer tank 11. The signal transmission duration between the controller 14 and the pressure sensor 12 will affect the duration of the entire closing process, while the characteristics of the air source and the volume of the gas buffer tank 11 will affect the air pressure change caused by the gas, etc.

[0057] For example, assume that the target pressure value set by the user is 100 KP and the current pressure value is 50 KP. At this time, the intake valve 131 can be controlled to open, so that the gas at the gas supply end 20 will enter the gas buffer tank 11, and the pressure of the gas buffer tank 11 will increase. At the same time, based on parameters such as the current opening degree of the intake valve 131, the characteristics of the air source, and the volume of the gas buffer tank 11, it can be predicted how much the air pressure in the gas buffer tank 11 will further increase from the trigger of closing the intake valve 131 to the complete closing of the intake valve 131. For example, assume the predicted value is 10 Kp. At this time, when the pressure sensor 12 detects that the current pressure of the gas buffer tank 11 is 90 KP, the intake valve 131 can be closed, so that the final pressure value of the gas buffer tank 11 is 100 KP.

[0058] The scenario where the target pressure value is greater than the current pressure value is similar. For example, assume that the target pressure value set by the user is 20 KP and the current pressure value is 50 KP. At this time, the exhaust valve 132 can be controlled to open, so that the gas in the gas buffer tank 11 will be discharged, and the pressure of the gas buffer tank 11 will decrease. At the same time, based on parameters such as the current opening degree of the exhaust valve 132, the characteristics of the air source, and the volume of the gas buffer tank 11, it can be predicted how much the air pressure in the gas buffer tank 11 will further decrease from the trigger of closing the exhaust valve 132 to the complete closing of the exhaust valve 132. For example, assume the predicted value is 10 Kp. At this time, when the pressure sensor 12 detects that the current pressure of the gas buffer tank 11 is 30 KP, the exhaust valve 132 can be closed, so that the final pressure value of the gas buffer tank 11 is 20 KP.

[0059] In the embodiments of the present application, by predicting the change value of the air pressure in the gas buffer tank 11 during the process from the triggering of the intake valve 131 or the exhaust valve 132 to the complete closing of the intake valve 131 or the exhaust valve 132, and then determining the closing timing based on this air pressure change value, the real-time pressure value in the gas buffer tank 11 at the closing moment is equal to the cumulative value of this air pressure change value, so that the pressure can be more accurately controlled near the target pressure value set by the user, achieving precise pressure control.

[0060] In the related art, when controlling the opening of the intake valve 131 or the exhaust valve 132, usually the opening degree of the intake valve 131 or the exhaust valve 132 is directly set to the maximum, resulting in a rapid rise or fall of the air pressure in the gas buffer tank 11 in a short 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 the 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 the exhaust valve 132, and vice versa, the smaller the opening degree.

[0061] In addition, the embodiments of the present application also provide a method for controlling air pressure, which is applicable to the air pressure stabilizing device 10. Among them, the air pressure stabilizing device 10 can be an existing air pressure stabilizing device 10, or the air pressure stabilizing device 10 mentioned in the above embodiments. For example, the air pressure stabilizing device 10 can include a controller 14, a gas buffer tank 11, a pressure sensor 12 arranged in the gas buffer tank 11, and an air pressure regulating valve 13. The controller 14 is respectively communicatively connected with the pressure sensor 12 and the air pressure regulating valve 13; this method can be executed by the controller 14, as Figure 7 shown, this method can 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. Control the opening of the air pressure regulating valve 13 based on the difference between the target pressure value and the current pressure value;

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

[0065] S708. Determine the closing timing of the air pressure regulating valve 13 based on the air pressure change value; the closing timing makes the pressure value in the gas buffer tank 11 detected at the closing moment of the air pressure regulating valve 13 and the cumulative value of the air pressure change value be the target pressure value;

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

[0067] In some embodiments, the air pressure change value is predicted based on one or more of the following parameters: the current opening degree of the air pressure regulating valve 13, the relevant characteristics of the air 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 air pressure regulating valve 13.

[0069] Among them, the specific control process of the above air pressure control method can refer to the descriptions of the embodiments in the above air pressure stabilizing device 10, and will not be elaborated here.

[0070] In addition, an embodiment of the present application further provides a muffler 15, which is used to silence the gas discharged by the exhaust device. The muffler 15 includes an air inlet hole 151, a first sound absorption cavity 152, a second sound absorption cavity 153, and a gas flow passage 154 that communicates with the air inlet hole 151 and penetrates through the first sound absorption cavity 152 and the second sound absorption cavity 153;

[0071] A plurality of conical reflecting surfaces 152a are provided in the first sound absorption cavity 152. The plurality of conical reflecting surfaces 152a are arranged at intervals along the gas flow passage 154. Among them, an opening 152b is provided at the top of each conical reflecting surface 152a, and the opening 152b is located on the side close to the air inlet hole 151, and the opening 152b is used to form a part of the gas flow passage 154;

[0072] A plurality of exhaust holes 153a are provided on the cavity of the second sound absorption cavity 153;

[0073] The gas discharged by the exhaust device enters the first sound absorption cavity 152 through the air inlet hole 151, is sequentially reflected by the plurality of conical reflecting surfaces 152a in the first sound absorption cavity 152, then enters the second sound absorption cavity 153 along the gas flow passage 154, and is dispersed and discharged from the plurality of exhaust holes 153a on the second sound absorption cavity 153.

[0074] In some embodiments, porous sound absorption materials are further provided in the first sound absorption cavity 152 and the second sound absorption cavity 153.

[0075] Among them, the specific structure and function of the muffler 15 can refer to the descriptions of the embodiments in the above air pressure stabilizing device 10, and will not be elaborated here.

[0076] In addition, an embodiment of the present application further provides a pneumatic pressure stabilizing device. The pneumatic pressure stabilizing device includes a muffler for muffling the gas discharged from the pneumatic pressure stabilizing device. The muffler includes an air inlet hole, a first sound absorption cavity, a second sound absorption cavity, and a gas flow passage that communicates with the air inlet hole and penetrates through the first sound absorption cavity and the second sound absorption cavity.

[0077] A plurality of conical reflection surfaces are provided in the first sound absorption cavity. The plurality of conical reflection surfaces are arranged at intervals along the gas flow passage. Among them, an opening is provided at the top of each conical reflection surface, and the opening is located on the side close to the air inlet hole. The opening is used to form a part of the gas flow passage.

[0078] A plurality of exhaust holes are provided on the cavity of the second sound absorption cavity.

[0079] The gas discharged from the exhaust device enters the first sound absorption cavity through the air inlet hole. After being reflected in sequence by the plurality of conical reflection surfaces in the first sound absorption cavity, it enters the second sound absorption cavity along the gas flow passage and is dispersed and discharged from the plurality of exhaust holes on the second sound absorption cavity.

[0080] Among them, the specific structure and function of this pneumatic pressure stabilizing device can refer to the descriptions of the above embodiments and will not be elaborated here.

[0081] Among them, the solutions of the above embodiments can be freely combined to obtain new solutions in the case of no conflict. Due to space limitations, they will not be listed one by one here.

[0082] In addition, an embodiment of the present application further provides a computer program product. The computer program product includes a computer program, and when the computer program is executed by a processor, it implements the method described in any one of the above.

[0083] Correspondingly, an embodiment of the present application further provides a computer storage medium. A program is stored in the storage medium, and when the program is executed by a processor, it implements the method in any one of the above embodiments.

[0084] Embodiments of the present application may take the form of a computer program product implemented on one or more storage media (including but not limited to disk memories, CD-ROMs, optical memories, etc.) that contain 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. The information can 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, compact disc read-only memory (CD-ROM), digital versatile disc (DVD), or other optical storage, magnetic cassette tapes, magnetic disks, or other magnetic storage devices, or any other non-transmission media 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 the descriptions of the method embodiments. The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed to multiple network units. Some or all of the modules can be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art can understand and implement it without creative efforts.

[0086] The user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data for analysis, stored data, displayed data, etc.) involved in the present application are all information and data authorized by the user or fully authorized by all parties. The collection, use, and processing of the relevant data need to comply with the relevant laws, regulations, and standards of the relevant countries and regions, and corresponding operation entrances are provided for the user to select authorization or rejection.

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

[0088] The methods and devices provided by the embodiments of the present application have been introduced in detail above. Specific examples are used in this document to elaborate on the principles and implementation manners of the present application. The description of the above embodiments is only used to help understand the method and its core idea of the present application; at the same time, for those of ordinary skill in the art, according to the idea of the present application, there will be changes in the specific implementation manners and application scopes. In summary, the content of the present application should not be construed as a limitation to the present application.

Claims

1. A pneumatic pressure stabilizing device, characterized in that, The air pressure stabilizing device includes a gas buffer tank, a pressure sensor disposed in the gas buffer tank, a pneumatic pressure regulating valve, and a controller. The controller is communicatively connected to the pressure sensor and the pneumatic pressure regulating valve respectively. The pneumatic pressure regulating valve includes an intake valve and an exhaust valve. The gas buffer tank includes an intake port, an exhaust port, and a gas supply port. The intake port is communicated with the intake valve, the exhaust port is communicated with the exhaust valve, and the gas supply port is communicated with the gas-using end; 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 obtain the target pressure value set by the user, and control the opening and closing state of the pneumatic pressure regulating valve based on the difference between the target pressure value and the current pressure value, so that the air pressure value output from the gas buffer tank to the gas-using end is the target pressure value; Wherein, the volume of the gas buffer tank can be automatically adjusted based on the pressure value in the gas buffer tank, so that the air pressure output from the gas buffer tank to the gas-using end is stabilized at the target pressure value.

2. The air pressure stabilizing device according to claim 1, characterized in that, The intake port, the exhaust port, and the gas supply port are arranged at the top of the gas buffer tank. A telescopic structure is provided between the top and the bottom of the gas buffer tank. The telescopic structure can automatically expand and contract based on the pressure change in the gas buffer tank to adjust the volume of the gas buffer tank.

3. The air pressure stabilizing device according to claim 2, wherein The bottom of the gas buffer tank is an elastic diaphragm, and the elastic diaphragm can automatically expand outward or contract inward based on the pressure change in the gas buffer tank to adjust the volume of the gas buffer tank.

4. The air 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 material of the gas buffer tank is TPU, and the gas buffer tank is integrally formed by 3D printing technology.

5. The air pressure stabilizing device according to claim 1, characterized in that, The air pressure stabilizing device further includes a silencer, which is connected to the exhaust valve and is used for silencing the gas discharged from the exhaust valve. Wherein, the silencer includes an intake hole, a first sound absorption chamber, a second sound absorption chamber, and a gas flow channel that is communicated with the intake hole and penetrates through the first sound absorption chamber and the second sound absorption chamber; A plurality of conical reflecting surfaces are provided in the first sound absorption chamber. The plurality of conical reflecting surfaces are arranged at intervals along the gas flow channel. Wherein, each conical reflecting surface is provided with an opening at the top, and the opening is located on the side close to the intake hole, and the opening is used to form a part of the gas flow channel; A plurality of exhaust holes are provided on the cavity of the second sound absorption chamber; The gas discharged from the exhaust valve enters the first sound absorption chamber through the intake hole, is reflected by the plurality of conical reflecting surfaces in the first sound absorption chamber in sequence, then enters the second sound absorption chamber along the gas flow channel, and is dispersed and discharged from the plurality of exhaust holes on the second sound absorption chamber.

6. The air pressure stabilizing device according to claim 5, characterized in that, The first sound absorption chamber and the second sound absorption chamber body are also provided with porous sound absorption materials.

7. The air pressure stabilizing device according to claim 1, wherein When the controller is used to control the opening and closing state of the pneumatic pressure regulating valve based on the difference between the target pressure value and the current pressure value, so that the air pressure value output from the gas buffer tank to the gas-using end is the target pressure value, it is specifically used for: Control the opening of the pneumatic pressure regulating valve based on the difference between the target pressure value and the current pressure value; Predict the change value of the air pressure in the gas buffer tank during the closing process of the pneumatic pressure regulating valve; Determine the closing timing of the pneumatic pressure regulating valve based on the change value of the air pressure, where the closing timing makes the cumulative value of the air pressure value detected in the gas buffer tank at the closing moment of the pneumatic pressure regulating valve and the change value of the air pressure be the target pressure value; Close the pneumatic pressure regulating valve based on the closing timing.

8. The air pressure stabilizing device according to claim 7, characterized in that, The change value of the air pressure is predicted based on one or more of the following parameters: the current opening degree of the pneumatic 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 pneumatic pressure regulating valve.

9. A pneumatic control method, characterized in that, The method is applicable to a pneumatic pressure stabilizing device, which includes a controller, a gas buffer tank, a pressure sensor disposed in the gas buffer tank, and a pneumatic pressure regulating valve. The controller is communicatively connected to the pressure sensor and the pneumatic pressure regulating valve respectively; The method is executed by the controller, and the method includes: Obtain the target pressure value set by the user and the current pressure value detected by the pressure sensor; Control the opening of the pneumatic pressure regulating valve based on the difference between the target pressure value and the current pressure value; Predict the change value of the air pressure in the gas buffer tank during the closing process of the pneumatic pressure regulating valve; Determine the closing timing of the pneumatic pressure regulating valve based on the change value of the air pressure; the closing timing makes the cumulative value of the air pressure value detected in the gas buffer tank at the closing moment of the pneumatic pressure regulating valve and the change value of the air pressure be the target pressure value; Close the pneumatic pressure regulating valve based on the closing timing.

10. The air pressure control method according to claim 9, wherein The change value of the air pressure is predicted based on one or more of the following parameters: the current opening degree of the pneumatic 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 pneumatic pressure regulating valve.

11. A silencer, characterized in that, The silencer is used to silence the gas discharged by the exhaust device. The silencer includes an air inlet hole, a first sound absorption chamber, a second sound absorption chamber, and a gas flow channel that is communicated with the air inlet hole and penetrates through the first sound absorption chamber and the second sound absorption chamber; A plurality of conical reflection surfaces are provided in the first sound absorption chamber. The plurality of conical reflection surfaces are arranged at intervals along the gas flow channel. Among them, an opening is provided at the top of each conical reflection surface, and the opening is located on the side close to the air inlet hole, and the opening is used to form a part of the gas flow channel; A plurality of exhaust holes are provided on the cavity of the second sound absorption chamber; The gas discharged by the exhaust device enters the first sound absorption chamber through the air inlet hole, is sequentially reflected by the plurality of conical reflection surfaces in the first sound absorption chamber, then enters the second sound absorption chamber along the gas flow channel, and is dispersed and discharged from the plurality of exhaust holes on the second sound absorption chamber.

12. A computer program product, characterized in that, The computer program product includes a computer program which, when executed by a processor, implements the method according to any one of claims 9-10.

Images