Leakage velocity valve assembly and air pump module

Abstract

The invention relates to a leakage speed valve assembly and an air pump module. The leakage speed valve assembly comprises a leakage speed valve body, a first control piece, a second control piece and a controller. A micropore group through which fluid passes is formed in the leakage speed valve main body, and the micropore group comprises an inlet and an outlet; the first control piece is arranged at the inlet and used for controlling the size of the inlet. The second control sheet is arranged at the outlet for controlling the size of the outlet; the pressure sensor is arranged in the micropore group; the controller is electrically connected with the first control piece, the second control piece and the pressure sensor, and the controller is configured to adjust the size of the inlet and the size of the outlet according to parameter values obtained by the pressure sensor so as to achieve dynamic balance of flowing of fluid in the micropore set. The size of the inlet and the size of the outlet can be dynamically adjusted according to parameter values obtained by the pressure sensor, dynamic balance of fluid flowing is achieved, the stability of the air leakage speed is ensured by dynamically adjusting the aperture, and the blood pressure measuring precision is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of leakage rate valves, and in particular to a leakage rate valve assembly and an air pump module. Background Art

[0002] With the continuous development of modern medical technology, medical devices such as electronic blood pressure monitors are becoming increasingly common in homes and medical institutions. As a key component in these devices, leak valves have a crucial impact on measurement accuracy and device performance. However, existing leak valve technology has some problems.

[0003] For example, the leakage valve described in patent CN104207759B consists of three main components: a front cover, a rear cover, and a deflation stabilizer. This multi-part structure not only increases production costs, but also increases the complexity of assembly. Secondly, the overall volume is large, taking up more space. In modern medical equipment, especially portable equipment, the requirements for space are becoming increasingly high, and the volume of traditional leakage valves limits their application in miniaturized equipment. In addition, the deflation stabilizer in this patent is made of elastic silicone material. Although silicone has a certain degree of elasticity, its wear resistance and aging resistance are poor, and it is easy to wear out during long-term use, resulting in unstable leakage rate, which in turn affects subsequent use. In addition, the aperture of the leakage valve in the prior art is usually fixed and cannot be dynamically adjusted according to actual needs. This limits the applicability of the leakage valve in different application scenarios, especially in situations where precise control of fluid flow is required. Summary of the Invention

[0004] The first object of the present invention is to provide a leakage valve assembly, which aims to solve the technical problems of the existing leakage valve, such as complex structure, large overall space occupation, short service life, and inability to be dynamically adjusted according to actual needs.

[0005] In order to solve the above technical problems, a leakage valve assembly is provided, comprising:

[0006] The leakage valve body is formed with a micropore group for fluid to pass through, and the micropore group includes an inlet and an outlet;

[0007] a first control piece, disposed at the entrance and used to control the size of the entrance;

[0008] a second control piece, disposed at the outlet and used to control the size of the outlet;

[0009] A pressure sensor is disposed in the micropore group;

[0010] A controller is electrically connected to the first control plate, the second control plate and the pressure sensor, respectively. The controller is configured to adjust the size of the inlet and the outlet according to the parameter value obtained by the pressure sensor to achieve a dynamic balance of fluid flow in the micropore group.

[0011] Furthermore, the micropore group includes a mixing chamber and at least two inlet channels, the inlet channels are connected to the mixing chamber, and each of the inlet channels has an intersection in the extension direction, and the intersection is located in the mixing chamber.

[0012] Furthermore, a preset angle is formed between the inlet channel and the central axis of the leakage valve body, and the preset angle is within the range of [30°, 45°].

[0013] Furthermore, the inlet channels are evenly distributed around the central axis, and the center of the outlet coincides with the central axis.

[0014] Furthermore, the inlet is located on a side of the inlet channel away from the mixing chamber, and the outlet is located on a side of the mixing chamber away from the inlet channel.

[0015] Furthermore, the mixing chamber is formed with a curved surface, and the size of the mixing chamber gradually decreases in the direction from the inlet channel toward the outlet, and the decreasing trend of the mixing chamber first gradually increases and then gradually decreases.

[0016] Furthermore, the leakage valve assembly further includes a sealing ring, which is connected to the leakage valve body and is located at one side of the inlet.

[0017] Furthermore, the first control piece is configured as a piezoelectric film, the second control piece is configured as a piezoelectric film, the pressure sensor is configured as a piezoelectric material, and the piezoelectric material is attached to the inner wall of the mixing chamber.

[0018] Furthermore, the leakage rate Q is expressed as:

[0019]

[0020] Where k represents the porosity, μ represents the viscosity of the fluid, L represents the length of the mixing chamber, P1 represents the pressure at the inlet, P2 represents the pressure at the outlet, and d represents the pore size of the outlet.

[0021] A second object of the present invention is to provide an air pump module, comprising:

[0022] The aforementioned leakage valve assembly;

[0023] An air cavity assembly is connected to the leakage rate valve assembly, and the air cavity assembly is in communication with the micropore assembly;

[0024] an air pump, connected to the air cavity assembly;

[0025] The air release valve is connected to the air cavity assembly.

[0026] The implementation of the present invention will have the following beneficial effects:

[0027] The leakage valve assembly of the present invention adopts a single-part design to reduce complex structures, and adopts a thin-sheet structure to significantly reduce volume and occupied space. In addition, the leakage valve body of the present application is made of metal material, which is conducive to improving the service life of the leakage valve. In addition, the leakage valve assembly of the present invention can monitor the pressure changes in the micropore group in real time by providing a first control plate, a second control plate, a pressure sensor and a controller, and dynamically adjust the size of the inlet and outlet according to the parameter value obtained by the pressure sensor to achieve dynamic balance of fluid flow. By dynamically adjusting the aperture, the stability of the leakage rate is ensured, and the accuracy of blood pressure measurement is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0029] Figure 1 This is a structural diagram of a leakage valve assembly according to an embodiment of the present invention;

[0030] Figure 2 This is a front view of the leakage valve assembly according to an embodiment of the present invention;

[0031] Figure 3 for Figure 2 Sectional view along line AA;

[0032] Figure 4 for Figure 3 A partial enlarged schematic diagram of point B in the middle;

[0033] Figure 5 This is a front view of the leakage valve body according to an embodiment of the present invention;

[0034] Figure 6 for Figure 5 Cross-sectional view along CC line;

[0035] Figure 7 This is a control principle diagram of the leakage valve assembly according to an embodiment of the present invention;

[0036] Figure 8 Schematic diagram of the structure of the air pump module according to an embodiment of the present invention.

[0037] Wherein: 100, leakage valve assembly; 110, leakage valve body; 111, micropore group; 1111, inlet; 1112, outlet; 1113, inlet channel; 1114, mixing chamber; 1115, intersection; 1116, curved surface; 112, placement groove; 113, mounting hole; 120, first control plate; 130, second control plate; 140, pressure sensor; 150, controller; 160, sealing ring; α, preset angle; γ, central axis;

[0038] 200. Air pump module; 210. Air chamber assembly; 220. Air pump; 230. Air relief valve. DETAILED DESCRIPTION

[0039] To facilitate understanding of the present invention, the present invention will be described more fully below with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the accompanying drawings. However, the present invention may be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and comprehensive understanding of the present disclosure.

[0040] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly attached to the other element or there may be an intermediate element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only.

[0041] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this invention pertains. The terms used in this specification of the present invention are for the purpose of describing specific embodiments only and are not intended to limit the present invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0042] Please refer to Figure 1-Figure 7An embodiment of the present invention provides a leakage valve assembly 100, which includes a leakage valve body 110, a first control plate 120, a second control plate 130, a pressure sensor 140, and a controller 150. The leakage valve body 110 is formed with a micropore group 111 for fluid passage, and the micropore group 111 includes an inlet 1111 and an outlet 1112. The first control plate 120 is disposed at the inlet 1111 to control the size of the inlet 1111. The second control plate 130 is disposed at the outlet 1112 to control the size of the outlet 1112. The pressure sensor 140 is disposed within the micropore group 111. The controller 150 is electrically connected to the first control plate 120, the second control plate 130, and the pressure sensor 140, respectively. The controller 150 is configured to adjust the sizes of the inlet 1111 and the outlet 1112 according to parameter values ​​obtained by the pressure sensor 140 to achieve dynamic balance of fluid flow within the micropore group 111. For example, in this embodiment, the first control plate 120 and the second control plate 130 utilize piezoelectric film, a material that converts electrical energy into mechanical energy. When an electric field is applied to the piezoelectric film, the film undergoes mechanical deformation, manifesting as elongation or contraction. This property allows piezoelectric film to be used to precisely control pore size. A pressure sensor 140 is disposed within the micropore array 111 to monitor pressure changes within the micropore array 111 in real time. By measuring pressure, the system can obtain information about the fluid flow status. The pressure sensor 140 monitors pressure changes within the micropore array 111 in real time and transmits the pressure value to the controller 150. The controller 150 receives the signal from the pressure sensor 140 and processes it according to a preset algorithm. The algorithm calculates the pore size adjustment required based on the difference between the current pressure value and the target pressure value. Based on the calculated results, the controller 150 sends control signals to the first control plate 120 and the second control plate 130. These signals trigger mechanical deformation of the piezoelectric film, thereby adjusting the size of the inlet 1111 and outlet 1112. When the pressure sensor 140 detects that the pressure at the inlet 1111 is too high, the controller 150 sends a signal to extend the first control plate 120 (piezoelectric film), thereby increasing the aperture of the inlet 1111 and increasing the amount of fluid flowing in. Conversely, when the pressure is too low, the controller 150 shortens the first control plate 120, reducing the aperture of the inlet 1111 and reducing the amount of fluid flowing in. When the pressure sensor 140 detects that the pressure at the outlet 1112 is too high, the controller 150 sends a signal to shorten the second control plate 130 (piezoelectric film), thereby reducing the aperture of the outlet 1112 and reducing the amount of fluid flowing out. Conversely, when the pressure is too low, the controller 150 shortens the second control plate 130, thereby increasing the aperture of the outlet 1112 and increasing the amount of fluid flowing out.

[0043] The leakage valve assembly 100 of the present invention adopts a single-part design to reduce complex structures, and adopts a thin-sheet structure to significantly reduce volume and occupied space. In addition, the leakage valve body 110 of the present application adopts a metal material, which is conducive to improving the service life of the leakage valve. In addition, the leakage valve assembly 100 of the present invention is capable of monitoring the pressure changes in the micropore group 111 in real time by arranging the first control plate 120, the second control plate 130, the pressure sensor 140 and the controller 150, and dynamically adjusting the size of the inlet 1111 and the outlet 1112 according to the parameter value obtained by the pressure sensor 140, realizing the dynamic balance of fluid flow, and ensuring the stability of the leakage rate by dynamically adjusting the aperture, improving the blood pressure measurement accuracy.

[0044] In one embodiment, the micropore group 111 is configured as a straight hole with a smaller aperture, or it can be set as multiple straight holes. The cross-sectional shape of the micropore group 111 can be circular, elliptical, rectangular, semicircular, or other shaped structures, and the number of holes can be one or more than two.

[0045] Please refer to Figure 3 and Figure 4 In one possible embodiment, the micropore group 111 includes a mixing chamber 1114 and at least two inlet channels 1113, the inlet channels 1113 are connected to the mixing chamber 1114, and each inlet channel 1113 has an intersection 1115 in the extension direction, and the intersection 1115 is located in the mixing chamber 1114. For example, in this embodiment, the micropore group 111 has four inlet channels 1113, the inlet channels 1113 are cylindrical, and the four inlet channels 1113 are distributed circumferentially along the central axis γ, that is, there is also an angle between two adjacent inlet channels 1113. The inclined design of the inlet channel 1113 causes the gas to slow down along the direction of the inlet channel 1113 before entering the mixing chamber 1114. This is conducive to slowing down the flow speed of the gas and reducing turbulence and pressure fluctuations. The gases of multiple inlet channels 1113 converge at the intersection 1115, further slowing down the flow speed of the gas. It is beneficial to ensure that the flow rate of the gas is more uniform and stable when entering the mixing chamber 1114. Slowing down the gas flow rate can reduce pressure fluctuations, allowing the pressure sensor 140 to more accurately measure the pressure changes in the mixing chamber 1114. This stable flow rate helps to improve the accuracy of blood pressure detection. By slowing down the gas flow rate, the measurement errors caused by fluid turbulence and pressure fluctuations can be reduced, thereby improving the accuracy and reliability of blood pressure measurement. Furthermore, the intersection 1115 is located at the center of the mixing chamber 1114, and the mixing chamber 1114 is designed to have a space of a certain volume for accommodating and mixing fluids from different inlet channels 1113. The intersection 1115 is located at the center of the mixing chamber 1114, which makes the flow of gas more stable when it converges, reducing turbulence and pressure fluctuations.

[0046] Please refer to Figure 3 and Figure 4 In one possible implementation, the inlet channel 1113 has a preset angle α with the central axis γ of the leakage valve body 110. The preset angle α is within the range of [30°, 45°]. For example, in this embodiment, the preset angle α is set to 38°. Of course, in specific applications, the preset angle α can also be set to 30°, or 31°, or 32°, or 33°, or 34°, or 35°, or 36°, or 37°, or 39°, or 40°, or 41°, or 42°, or 43°, or 44°, or 45°.

[0047] Please refer to Figure 3 and Figure 4 In one possible embodiment, the inlet channels 1113 are evenly distributed around the central axis γ, and the center of the outlet 1112 coincides with the central axis γ. For example, the inlet channels 1113 are evenly distributed around the central axis γ, so that the fluid can flow evenly in multiple directions before entering the mixing chamber 1114. This is beneficial to reducing the situation where local pressure is too high or too low, thereby achieving a more stable fluid flow. The evenly distributed inlet channels 1113 can reduce turbulence and pressure fluctuations when the fluid enters the mixing chamber 1114, thereby improving the stability of the fluid flow. The evenly distributed inlet channels 1113 and the centrally symmetrical outlet 1112 design can reduce pressure fluctuations, enabling the pressure sensor 140 to more accurately measure pressure changes in the mixing chamber 1114. Stable flow rate and pressure changes help to improve the accuracy of blood pressure detection. The center of the outlet 1112 coincides with the central axis γ, so that after the fluid is evenly distributed in the mixing chamber 1114, it can flow out smoothly through the centrally symmetrical outlet 1112. This helps reduce turbulence and pressure fluctuations at the outlet 1112 and improves the uniformity of fluid flow. The centrally symmetrical outlet 1112 design can reduce the situation where local pressure is too high or too low, ensuring that the flow rate of the fluid at the outlet 1112 is more uniform and stable.

[0048] Please refer to Figure 3 and Figure 4 In a possible implementation, the inlet 1111 is located on a side of the inlet channel 1113 away from the mixing chamber 1114 , and the outlet 1112 is located on a side of the mixing chamber 1114 away from the inlet channel 1113 .

[0049] Please refer to Figure 3 and Figure 4In one possible embodiment, the mixing chamber 1114 is formed with a curved surface 1116, and the size of the mixing chamber 1114 gradually decreases in the direction from the inlet channel 1113 to the outlet 1112, and the decreasing trend of the mixing chamber 1114 first gradually increases and then gradually decreases. For example, the design of the curved surface 1116 allows the fluid to flow smoothly along the curved surface 1116 after entering the mixing chamber 1114, reducing turbulence and pressure loss. This design can effectively reduce the kinetic energy of the gas when entering the mixing chamber 1114, reducing energy loss. The design of the curved surface 1116 helps to evenly distribute the fluid in the mixing chamber 1114, reduce the situation where local pressure is too high or too low, and thus achieve more stable fluid flow. The design of the curved surface 1116 can guide the fluid to flow along a specific path, so that the fluids from different inlet channels 1113 can be mixed more fully. The design of the curved surface 1116 can reduce the dead zone of the fluid in the mixing chamber 1114, so that the fluid can be more evenly distributed and mixed. Reducing pressure fluctuations can improve the measurement accuracy of pressure sensor 140, enabling it to more accurately measure pressure changes within mixing chamber 1114. Stable flow rates and pressure changes help improve the accuracy of blood pressure measurements. By reducing turbulence and pressure fluctuations, measurement errors caused by uneven fluid distribution can be reduced, thereby improving measurement accuracy and reliability.

[0050] like Figure 4 As shown, the gas first enters the leakage valve assembly 100 through the tilted inlet channel 1113. The gas first enters the leakage valve assembly 100 through the tilted inlet channel 1113. In the mixing chamber 1114, the gases from different inlet channels 1113 collide at the intersection 1115 and begin to mix. The curved surface 1116 design of the mixing chamber 1114 helps promote the mixing and deceleration of the gas. Since the inlet channels 1113 are evenly distributed with the central axis γ as the center, multiple gas flows collide at the intersection 1115. This allows the gas to be pre-mixed before entering the mixing chamber 1114, thereby improving the mixing efficiency. The design of the gradually decreasing size of the mixing chamber 1114 is conducive to further guiding the gas flow, slowing down the gas flow speed, and promoting uniform gas mixing.

[0051] Please refer to Figure 2 、 Figure 3 and Figure 4In a possible embodiment, the leakage valve assembly 100 also includes a sealing ring 160, which is connected to the leakage valve body 110 and is located on one side of the inlet 1111. Exemplarily, a placement groove 112 is formed on the leakage valve body 110, and the placement groove 112 is used to place the sealing ring 160. The sealing ring 160 is annular, and it is understandable that the placement groove 112 is also annular. The main function of the sealing ring 160 is to prevent fluid from leaking from the various connection parts of the leakage valve assembly 100. By arranging the sealing ring 160 at the inlet 1111 and the outlet 1112, the leakage of the fluid can be effectively reduced, ensuring the sealing performance of the system. Good sealing performance can reduce the change in fluid flow caused by leakage, thereby improving the measurement accuracy of the pressure sensor 140 and ensuring the accuracy of blood pressure measurement.

[0052] In one possible implementation, first control sheet 120 is configured as a piezoelectric film, second control sheet 130 is configured as a piezoelectric film, and pressure sensor 140 is configured as a piezoelectric material, with the piezoelectric material attached to the inner wall of mixing chamber 1114. It should be noted that placing pressure sensor 140 within mixing chamber 1114 of micropore array 111 allows for simultaneous monitoring of pressure changes at inlet 1111 and outlet 1112. Mixing chamber 1114 serves as an intermediate buffer zone for fluid flow, and its pressure changes can reflect the combined effects of inlet 1111 and outlet 1112. Specifically, the pressure sensor 140 is configured as a piezoelectric material coated on the surface of the mixing chamber 1114. Specifically, in this embodiment, the piezoelectric material used is zinc oxide (ZnO). ZnO is a piezoelectric semiconductor material with good piezoelectric properties and transparent conductive properties. ZnO is coated on the inner wall of the mixing chamber 1114 by hydrothermal method or chemical vapor deposition (CVD) technology. When the inner wall of the mixing chamber 1114 is deformed by pressure, the piezoelectric material generates an electrical signal. The piezoelectric material is coated on the entire inner wall of the mixing chamber 1114, that is, the piezoelectric material is close to both the inlet 1111 and the outlet 1112, so that the pressure changes of the inlet 1111 and the outlet 1112 can be monitored simultaneously. The mixing chamber 1114 serves as an intermediate buffer area for the fluid, and its pressure changes can reflect the combined influence of the inlet 1111 and the outlet 1112.

[0053] The controller 150 uses an algorithm to dynamically adjust the size of the inlet 1111 and the outlet 1112 based on the pressure value obtained by the pressure sensor 140. The specific strategy is as follows:

[0054] (1) Pressure monitoring

[0055] The pressure sensor 140 monitors the pressure changes in the mixing chamber 1114 in real time and transmits the pressure value to the controller 150 .

[0056] (2) Signal processing

[0057] The controller 150 calculates the aperture sizes of the inlet 1111 and the outlet 1112 that need to be adjusted based on the pressure value obtained by the pressure sensor 140 and the preset target pressure range. The controller 150 can use the following logic:

[0058] Adjustment of inlet 1111: If the pressure in the mixing chamber 1114 is lower than the lower limit of the target pressure range, it means that the flow of inlet 1111 is insufficient and the aperture of inlet 1111 needs to be increased; if the pressure is higher than the upper limit of the target pressure range, it means that the flow of inlet 1111 is too large and the aperture of inlet 1111 needs to be reduced.

[0059] Adjustment of outlet 1112: If the pressure in the mixing chamber 1114 is higher than the upper limit of the target pressure range, it means that the flow rate of outlet 1112 is insufficient and the aperture of outlet 1112 needs to be increased; if the pressure is lower than the lower limit of the target pressure range, it means that the flow rate of outlet 1112 is too large and the aperture of outlet 1112 needs to be reduced.

[0060] (3) Aperture adjustment

[0061] Based on the calculation results, the controller 150 sends control signals to the first control plate 120 (inlet 1111) and the second control plate 130 (outlet 1112) to adjust the aperture size. The aperture is dynamically adjusted by the expansion or contraction of the piezoelectric film.

[0062] In a possible implementation, the leakage rate Q is expressed as:

[0063]

[0064] Where k represents porosity, μ represents the viscosity of the fluid, L represents the length of the mixing chamber 1114, P1 represents the pressure at the inlet 1111, P2 represents the pressure at the outlet 1112, and d represents the pore size of the outlet 1112. For example, porosity is a measure of the proportion of pores in a porous medium, typically expressed as a percentage. In a leakage valve, porosity affects the ease with which fluid passes through the micropore array 111. A higher porosity reduces the resistance to fluid flow and increases the leakage rate. The pore size of the outlet 1112 is the diameter of the outlet 1112, which affects the flow rate of fluid through the outlet 1112. A larger pore size increases the flow rate and increases the leakage rate. The inlet 1111 pressure and the outlet 1112 pressure represent the pressure of the fluid at both ends of the micropore array 111. The pressure difference P1-P2 is the driving force that drives the fluid through the micropore array 111. A larger pressure difference increases the flow rate and increases the leakage rate. Fluid viscosity is a parameter that describes the internal resistance of the fluid. The greater the viscosity, the greater the resistance within the fluid, making it more difficult for the fluid to pass through the micropore array 111, and the slower the leakage rate. The length of the mixing chamber 1114 is the distance the fluid flows within the mixing chamber 1114. The longer the length, the greater the resistance of the fluid within the mixing chamber 1114, and the slower the leakage rate.

[0065] The formula for air leakage rate is derived from Darcy's law. Darcy's law describes the relationship between the flow rate of a fluid through a porous medium and the pressure difference, porosity, fluid viscosity, and medium length. The formula is:

[0066]

[0067] Where A is the cross-sectional area through which the fluid passes. In a leakage valve, the cross-sectional area A can be expressed as:

[0068]

[0069] Substituting A into Darcy's law formula, we get the above leakage rate formula Q.

[0070] We can control the size of the inlet 1111 and the outlet 1112 by the following steps and methods to achieve dynamic balance of fluid flow:

[0071] Pressure monitoring: The pressure sensor 140 monitors the pressure changes in the mixing chamber 1114 in real time and transmits the pressure values ​​P1 and P2 to the controller 150 .

[0072] Signal processing: The controller 150 calculates the current leakage rate Q according to the pressure value and compares it with the target leakage rate Qtarget.

[0073] Aperture adjustment: The controller 150 sends control signals to the first control piece 120 and the second control piece 130 according to the comparison result to adjust the aperture sizes of the inlet 1111 and the outlet 1112 .

[0074] Feedback control: The controller 150 continuously monitors pressure changes and dynamically adjusts the aperture based on real-time data to ensure that the leakage rate Q remains within the target range.

[0075] Please refer to Figure 8 A second object of the present invention is to provide an air pump module 200, comprising an air cavity assembly 210, an air pump 220, a bleed valve, and the aforementioned leakage valve assembly 100. The air cavity assembly 210 is connected to the leakage valve assembly 100, and the air cavity assembly 210 is in communication with the micropore assembly 111; the air pump 220 is in communication with the air cavity assembly 210; and the bleed valve is connected to the air cavity assembly 210. Exemplarily, the leakage valve body 110 further includes a mounting hole 113, through which the leakage valve assembly 100 is mounted using bolts or screws.

[0076] Working process of air pump module 200

[0077] Inflation stage:

[0078] Air pump 220 starts to inflate the air system, gradually increasing the pressure within air chamber assembly 210. This inflation process establishes the necessary pressure foundation for the subsequent deflation process. Only when sufficient pressure is achieved within the air chamber can accurate blood pressure measurements be made during the deflation process.

[0079] The pressure sensor 140 in the air cavity assembly 210 monitors pressure changes in real time and transmits the data to the controller 150 .

[0080] Pressure monitoring and control:

[0081] When the pressure in the air cavity assembly 210 reaches a preset peak value, the air pump 220 stops working.

[0082] Pressure sensor 140 continues to monitor pressure changes, and controller 150 dynamically adjusts the aperture of the leak valve based on the pressure data to ensure a stable gas flow rate. By precisely controlling the inflation process, the pressure in the air chamber can be ensured to reach a preset peak value, thereby improving measurement accuracy.

[0083] Uniform deflation stage:

[0084] Gas flows out at a constant rate through the tiny aperture of the leak valve. Pressure sensor 140 monitors pressure changes in real time and transmits the data to controller 150. This constant rate of gas release simulates changes in blood pressure, making the measurement more accurate. By dynamically adjusting the aperture of the leak valve, the gas flow rate can be kept stable, thereby improving measurement accuracy.

[0085] The controller 150 dynamically adjusts the aperture size of the leakage valve according to the pressure data to ensure a stable flow rate of the gas, thereby improving measurement accuracy.

[0086] Data collection and processing:

[0087] During the uniform deflation process, the pressure sensor 140 obtains the user's pulse pressure signal through the change in pressure.

[0088] The sensor transmits the collected data to controller 150, which processes and converts it into a digital signal for display, completing the blood pressure measurement. During the uniform deflation process, pressure sensor 140 detects the user's pulse pressure signal through pressure changes. These signals are collected by the sensor and transmitted to controller 150, which processes and converts them into a digital signal for display, completing the blood pressure measurement.

[0089] Deflate Complete:

[0090] After the measurement is completed, the air release valve opens and the remaining gas in the air cavity is quickly discharged through the air release valve.

[0091] The system is ready for the next measurement.

[0092] The above-described embodiments merely represent several implementation methods of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the patent for this invention shall be determined by the appended claims.

Claims

1. A leakage valve assembly, characterized in that: include: The leakage valve body is formed with a micropore group for fluid to pass through, and the micropore group includes an inlet and an outlet; a first control piece, disposed at the entrance and used to control the size of the entrance; a second control piece, disposed at the outlet and used to control the size of the outlet; A pressure sensor is disposed in the micropore group; A controller is electrically connected to the first control plate, the second control plate and the pressure sensor, respectively. The controller is configured to adjust the size of the inlet and the outlet according to the parameter value obtained by the pressure sensor to achieve a dynamic balance of fluid flow in the micropore group.

2. The leakage valve assembly according to claim 1, characterized in that: The micropore group includes a mixing chamber and at least two inlet channels, wherein the inlet channels are communicated with the mixing chamber, and each of the inlet channels has an intersection in an extension direction, and the intersection is located in the mixing chamber.

3. The leakage rate valve assembly according to claim 2, characterized in that: The inlet channel and the central axis of the leakage valve body have a preset angle, and the preset angle is within the range of [30°, 45°].

4. The leakage valve assembly according to claim 3, characterized in that: The inlet channels are evenly distributed around the central axis, and the center of the outlet coincides with the central axis.

5. The leakage valve assembly according to claim 2, characterized in that: The inlet is located on a side of the inlet channel away from the mixing chamber, and the outlet is located on a side of the mixing chamber away from the inlet channel.

6. The leakage rate valve assembly according to claim 5, characterized in that: The mixing chamber is formed with a curved surface. In the direction from the inlet channel to the outlet, the size of the mixing chamber gradually decreases, and the decreasing trend of the mixing chamber first gradually increases and then gradually decreases.

7. The leakage rate valve assembly according to claim 6, characterized in that: The leakage valve assembly further includes a sealing ring, which is connected to the leakage valve body and is located at one side of the inlet.

8. The leakage rate valve assembly according to claim 2, characterized in that: The first control piece is configured as a piezoelectric film, the second control piece is configured as a piezoelectric film, the pressure sensor is configured as a piezoelectric material, and the piezoelectric material is attached to the inner wall of the mixing chamber.

9. The leakage rate valve assembly according to claim 1, characterized in that: The leakage rate Q is expressed as: Where k represents the porosity, μ represents the viscosity of the fluid, L represents the length of the mixing chamber, P1 represents the pressure at the inlet, P2 represents the pressure at the outlet, and d represents the pore size of the outlet.

10. An air pump module, characterized in that: include: The leakage valve assembly according to any one of claims 1 to 9; An air cavity assembly is connected to the leakage rate valve assembly, and the air cavity assembly is in communication with the micropore assembly; an air pump, connected to the air cavity assembly; The air release valve is connected to the air cavity assembly.

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