An air-tight system pressure balance analysis method, device, equipment and storage medium

Abstract

This invention discloses a method, apparatus, device, and storage medium for pressure balance analysis of an airtight system. By acquiring the actual internal and external air pressures of the airtight system after a first preset operating time, the actual pressure difference is obtained. Based on the actual pressure difference and the volume of the airtight system, the amount of gas particles lost after a second preset operating time is calculated using a constructed internal / external pressure difference fitting function and its derivative. Based on the gas particle loss, the current internal air pressure of the airtight system after the second preset operating time is obtained. A cyclic process is executed based on the current internal and external air pressures until a preset number of cycles is reached. The cycle is then stopped, and the current internal air pressure obtained in each cycle is stored. This cyclic process is repeated until the preset number of cycles is reached, resulting in multiple current internal air pressures, which are then fitted and analyzed. The above method provides a more accurate estimation of the internal air pressure of the airtight system.

Description

Technical Field

[0001] This invention relates to the field of pressure balance analysis technology for airtight systems, and in particular to a method, apparatus, equipment and storage medium for pressure balance analysis of airtight systems. Background Technology

[0002] When battery packs and sealed storage boxes are transported by air or on a moving vehicle, they experience varying air pressures at different altitudes, causing these pressures to gradually change. During the balancing process, the peak pressure must not exceed the allowable structural pressure. Currently, in engineering applications, the appropriateness of pressure valve selection is generally demonstrated by assessing the equivalent gas volume loss or absorption rate corresponding to the pressure difference between the inside and outside of the system per unit time, based on the gas law.

[0003] However, in actual engineering scenarios, air pressure is closely related to transportation, operating modes, and time factors. General analysis and design methods have the following problems: In differential pressure mode, the core component of the vent valve has a non-linear relationship between pressure and flow rate, and factors such as time, velocity, and gas loss during the air pressure change process are over-averaged and estimated, resulting in insufficient analysis accuracy; the venting parameters of the balance valve determined by the analysis and selection are seriously amplified, reducing system reliability and increasing costs; the pressure of the closed space under operating conditions cannot be quantitatively evaluated, thus failing to accurately quantify whether the allowable air pressure state of the closed system has been achieved; and the analysis process is a reverse adaptation analysis, which cannot analyze the target process in a forward manner. Summary of the Invention

[0004] To address the aforementioned technical problems, embodiments of the present invention provide a method, apparatus, device, and storage medium for pressure balance analysis of airtight systems, thereby resolving the issue of low analysis accuracy in conventional pressure balance analysis methods for complex airtight systems.

[0005] A first aspect of the present invention provides a method, the method comprising:

[0006] Obtain the actual internal and external air pressure of the airtight system after it has been running for a first preset time;

[0007] Based on the actual internal and external air pressure, the actual pressure difference is obtained. Based on the actual pressure difference and the volume of the airtight system, the amount of gas particles lost by the airtight system after the second preset time is calculated using the constructed internal and external pressure difference fitting function and the internal and external pressure difference derivative function.

[0008] Based on the amount of gas particle loss, the current internal air pressure of the airtight system after running for a second preset time is obtained. The current internal air pressure is stored, and the current external air pressure is obtained based on the current internal air pressure and the position of the airtight system. The loop process is executed based on the current internal air pressure and the current external air pressure until the preset number of loops is reached. The loop is stopped, and the current internal air pressure obtained in each loop is stored.

[0009] By performing fitting analysis on multiple stored current internal pressures, the maximum or minimum internal pressure of the airtight system, as well as the time corresponding to the maximum or minimum value, can be obtained.

[0010] In one possible implementation of the first aspect, the actual pressure difference is input into the internal and external pressure difference fitting function for calculation to obtain the actual time.

[0011] The particle throughput is obtained based on the actual time, the derivative of the internal and external pressure difference, and the volume of the airtight system.

[0012] Based on the particle throughput, the amount of gas particles lost from the airtight system after a second preset operating time is calculated. The expression for the amount of gas particle loss is as follows:

[0013] ΔN fit =Δt*K fit

[0014] In the formula, ΔN fit K represents the amount of gas particles lost. fit Δt represents the particle throughput rate, and Δt is the difference between the second preset operating time and the first preset operating time of the airtight system.

[0015] In one possible implementation of the first aspect, the internal and external pressure difference fitting function and the internal and external pressure difference derivative function are obtained by testing the airtight system, including:

[0016] Obtain the air permeable area of ​​the air permeable element, and obtain the internal air pressure test data and external air pressure test data of the airtight system connected to the air permeable element at multiple preset times;

[0017] Based on internal and external air pressure test data, the test pressure difference at each preset time is obtained. The internal and external pressure difference fitting function is obtained by fitting the test pressure difference at each preset time.

[0018] The derivative of the internal and external pressure difference fitting function is obtained by taking the derivative of the internal and external pressure difference function.

[0019] In one possible implementation of the first aspect, acquiring internal and external air pressure test data of the airtight system connected to the ventilated element at multiple preset times includes:

[0020] Gas is introduced into the airtight system until the internal pressure of the airtight system reaches the first preset pressure value, then the gas supply is stopped.

[0021] Record the internal and external air pressure test data of the airtight system every preset time interval until the pressure difference between the internal and external air pressure of the airtight system reaches the second preset air pressure value, and then stop recording to obtain the internal and external air pressure test data at each preset time.

[0022] In one possible implementation of the first aspect, the current internal pressure of the airtight system after operating for a second preset time is obtained based on the amount of gas particle loss, including:

[0023] Based on the gas state equation, the gas particle number change function of the airtight system after the second preset time of operation is constructed according to the actual internal air pressure.

[0024] After simultaneously calculating the gas particle loss and gas particle number change functions, the current internal air pressure of the airtight system after a second preset time is obtained, where the second preset time is greater than the first preset time.

[0025] In one possible implementation of the first aspect, based on the gas law, a gas particle number change function of the airtight system after operating for a second preset time is constructed according to the actual internal gas pressure, including:

[0026] Inputting the actual internal gas pressure into the gas state equation yields the number of the first gas particles, where the expression for the number of the first gas particles is:

[0027]

[0028] In the formula, N act,t P represents the number of gas particles in the airtight system after the first preset time of operation. it T represents the actual internal air pressure. t R is the gas temperature after the airtight system has been running for the first preset time, and V is the universal gas constant. act The gas volume of the airtight system after the first preset operating time;

[0029] Based on the gas law, a gas particle number change function is constructed using the first gas particle number, after the airtight system has been running for a second preset time. The expression for the gas particle number change function is:

[0030]

[0031] In the formula, N act,t P represents the number of gas particles in the airtight system after the first preset time of operation. it+ΔtT represents the internal air pressure of the airtight system after the second preset operating time. t+Δt The gas temperature of the airtight system after the second preset operating time is given by R, where R is the universal gas constant, and V is the gas temperature. act This refers to the gas volume of the airtight system after the second preset operating time.

[0032] In one possible implementation of the first aspect, the cyclic process is performed based on the current internal air pressure and the current external air pressure, including:

[0033] The updated actual pressure difference is obtained based on the current internal and external air pressures;

[0034] Based on the updated actual pressure difference and the volume of the airtight system, the new gas particle loss of the airtight system is calculated using the constructed internal and external pressure difference fitting function and the internal and external pressure difference derivative function.

[0035] Based on the amount of gas particle loss, the new current internal air pressure of the airtight system after a preset operating time is obtained. The new current internal air pressure is stored, and the new current external air pressure is obtained based on the new current internal air pressure and the location of the airtight system.

[0036] The steps involve determining the new current internal air pressure and the new current external air pressure, storing them, and then returning to obtain the updated actual pressure difference based on the current internal and external air pressures.

[0037] To address the same technical problem, a second aspect of the present invention provides a pressure balance analysis device for an airtight system, the device comprising:

[0038] The acquisition module is used to acquire the actual internal air pressure and actual external air pressure of the airtight system after running for a first preset time;

[0039] The first calculation module is used to obtain the actual pressure difference based on the actual internal air pressure and the actual external air pressure, and to calculate the amount of gas particles lost by the airtight system after running for a second preset time by using the constructed internal and external pressure difference fitting function and internal and external pressure difference derivative function based on the actual pressure difference and the volume of the airtight system.

[0040] The second calculation module is used to obtain the current internal air pressure of the airtight system after running for a second preset time based on the amount of gas particle loss, store the current internal air pressure and obtain the current external air pressure based on the current internal air pressure and the location of the airtight system, execute a loop process based on the current internal air pressure and the current external air pressure until the preset number of loops is reached, stop the loop and store the current internal air pressure obtained in each loop.

[0041] The analysis module is used to perform fitting analysis on multiple stored current internal pressures to obtain the maximum or minimum internal pressure of the airtight system, as well as the time corresponding to the maximum or minimum value.

[0042] A third aspect of the present invention provides a computer device, comprising:

[0043] Memory, used to store computer programs;

[0044] A processor is used to execute computer programs to implement steps of the pressure balance analysis method for airtight systems, as described in the first aspect.

[0045] A fourth aspect of the present invention provides a storage medium storing a computer program, which, when executed by a processor, implements the steps of the airtight system pressure balance analysis method of the first aspect.

[0046] The technical solution of this invention has the following advantages:

[0047] The pressure balance analysis method for an airtight system provided in this invention obtains the actual internal and external air pressures of the airtight system after a period of operation, thus obtaining the actual pressure difference. Based on the actual pressure difference and the volume of the airtight system, the amount of gas particles lost after a second preset time of operation is calculated using a constructed internal and external pressure difference fitting function and its derivative. Then, based on the amount of gas particles lost, the current internal air pressure of the airtight system after another period of operation is obtained. This current internal air pressure is stored, and the current external air pressure is obtained based on the current internal air pressure and the location of the airtight system. A cyclic process is executed based on the current internal and external air pressures until a preset number of cycles is reached. The cycle is then stopped, and the current internal air pressure obtained in each cycle is stored. A fitting analysis is performed on the stored multiple current internal air pressures to obtain the maximum or minimum value of the internal air pressure of the airtight system, as well as the time corresponding to the maximum or minimum value. This method, through differential analysis of the airtight system, makes the estimation result of the internal air pressure of the airtight system more accurate. Attached Figure Description

[0048] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0049] Figure 1 This is a flowchart of the pressure balance analysis method for an airtight system in an embodiment of the present invention;

[0050] Figure 2 This is a flowchart illustrating the construction of the internal and external pressure difference fitting function in the pressure balance analysis method for an airtight system according to an embodiment of the present invention.

[0051] Figure 3 This is a flowchart illustrating the internal air pressure calculation process of the airtight system pressure balance analysis method in an embodiment of the present invention.

[0052] Figure 4 This is a structural block diagram of the pressure balance analysis device for an airtight system in an embodiment of the present invention. Detailed Implementation

[0053] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0054] In the description of this invention, it should be noted that the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0055] The pressure balance analysis method for airtight systems provided in this embodiment of the invention, such as... Figure 1 As shown, Figure 1 The flowchart for the pressure balance analysis method of an airtight system includes steps S101 to S104, and the specific steps are as follows:

[0056] S101: Obtain the actual internal air pressure and actual external air pressure of the airtight system after running for the first preset time.

[0057] In this embodiment, the airtight system equipped with a pressure balancing element has the same internal and external air pressure in its initial state. However, if the enclosure or vehicle system is under transportation or operation, the ambient air pressure changes due to altitude variations. This creates a pressure difference between the inside and outside of the airtight system. Gas flows through the balancing element, causing the pressure difference to decrease and tend towards equilibrium. First, the actual internal air pressure P of the airtight system to be analyzed at any time t is obtained. it .

[0058] The altitude of the airtight system is related to the rate of ascent. According to the pressure height formula, the actual external air pressure at time t is:

[0059] P ot =g(h t )

[0060] In the formula, P ot h represents the actual external air pressure. t =vt, where v is the rising speed of the airtight system and t is time.

[0061] When the external air pressure data is not a pressure-height curve, the air pressure value can be collected by an external environment pressure measuring device.

[0062] It should be noted that an airtight system refers to a closed system that prevents the free exchange of gases between the system's interior and the external environment. A pressure balancing element is a component installed in an airtight system, and its main function is to regulate the pressure difference between the inside and outside of the system, so that the pressure inside and outside the system can reach a balanced state or control the pressure difference within a safe and reasonable range.

[0063] S102: Based on the actual internal air pressure and the actual external air pressure, the actual pressure difference is obtained. According to the actual pressure difference and the volume of the airtight system, the amount of gas particles lost by the airtight system after running for a second preset time is calculated using the constructed internal and external pressure difference fitting function and the internal and external pressure difference derivative function.

[0064] In this embodiment, the pressure difference at time t is obtained based on the actual external air pressure of the airtight system at any instant t. Under application conditions, the effective permeable area determined by the airtight system design is S. act The internal and external pressure difference is ΔP. iot In this case, the particle penetration rate of gas through an actual permeable system can be calculated using the following formula:

[0065]

[0066] In the formula, L act S is the particle penetration rate. act S is the effective air permeable area determined for the design of an airtight system. cail ΔP is the area of ​​the breathable element connected to the airtight system. iot This represents the pressure difference between the inside and outside.

[0067] By using the pressure difference at time t and the volume of the airtight system, and by using the constructed internal and external pressure difference fitting function and the internal and external pressure difference derivative function, the amount of gas particles that escape from the pressure balance element can be determined.

[0068] In one embodiment, based on the actual pressure difference and the volume of the airtight system, the amount of gas particles lost by the airtight system after a second preset operating time is calculated using a constructed internal and external pressure difference fitting function and an internal and external pressure difference derivative function, including:

[0069] The actual pressure difference is input into the internal and external pressure difference fitting function to calculate the actual time.

[0070] The particle throughput is obtained based on the actual time, the derivative of the internal and external pressure difference, and the volume of the airtight system.

[0071] Based on the particle throughput, the amount of gas particles lost from the airtight system after a second preset operating time is calculated. The expression for the amount of gas particle loss is as follows:

[0072] ΔN fit =Δt*K fit

[0073] In the formula, ΔN fit K represents the amount of gas particles lost. fit Δt represents the particle throughput rate, and Δt is the difference between the second preset operating time and the first preset operating time of the airtight system.

[0074] In this embodiment, the pressure difference at time t is obtained based on the internal and external air pressures of the airtight system at any instant t. As time iterates from t to t+Δt, the internal and external air pressures change. According to Knudsen's law, under a certain pressure difference, the air permeability (particle number) is proportional to the area of ​​the air-permeable element. The pressure difference ΔP at time t is input into the internal and external pressure difference fitting function P. c = calculate f(x) to find the x corresponding to ΔP. t That is, the actual time. x represents the actual time. t The derivative function of the internal and external pressure difference, Q = g(x), is input. The equivalent gas particle elapsed rate over time is obtained by solving for the inverse function or using Newton's iteration method. The pressure difference ΔP and the equivalent gas particle elapsed rate K are also related. fit The conversion process of the function relationship y(ΔP) is as follows:

[0075]

[0076] In the formula, K fit P is the particle loss rate. c Let R be the fitting function for the internal and external pressure difference, T be the gas temperature, and V be the external pressure difference. cail This refers to the volume of the airtight system.

[0077] When iterating from time t to time t+Δt, and when Δt is sufficiently small, the attenuation rate at time t+Δt can be approximately estimated using the slope of the calibration data at time t. The amount of gas particles lost, i.e., the amount of gas particles lost, is:

[0078]

[0079] In the formula, K fit For the particle loss rate, ΔP iot For the internal and external pressure difference, S cail S represents the area of ​​the breathable element. act P represents the effective breathable area of ​​the breathable element. it P represents the actual internal air pressure. ot ΔN represents the actual external air pressure. fitThis represents the amount of gas particles lost.

[0080] In one embodiment, the fitting function for the internal and external pressure difference and the derivative function of the internal and external pressure difference are obtained by testing the airtight system, including:

[0081] Obtain the air permeable area of ​​the air permeable element, and obtain the internal air pressure test data and external air pressure test data of the airtight system connected to the air permeable element at multiple preset times;

[0082] Based on internal and external air pressure test data, the test pressure difference at each preset time is obtained. The internal and external pressure difference fitting function is obtained by fitting the test pressure difference at each preset time.

[0083] The derivative of the internal and external pressure difference fitting function is obtained by taking the derivative of the internal and external pressure difference function.

[0084] In this embodiment, as Figure 2 As shown, the area S calibrated by the test is... cail The breathable element is connected to a constant volume V cail The system is an airtight system. Data on the cumulative change of internal air pressure over time is collected. The collected pressure-time data is processed, and a functional relationship between the pressure difference between the inside and outside of the tank and time (x) is calculated, i.e., the internal and external pressure difference fitting function P. c =f(x), calculate the first derivative of the fitting function for the internal and external pressure difference Q = g(x).

[0085] In one embodiment, acquiring internal and external air pressure test data of an airtight system connected to a breathable element at multiple preset times includes:

[0086] Gas is introduced into the airtight system until the internal pressure of the airtight system reaches the first preset pressure value, then the gas supply is stopped.

[0087] Record the internal and external air pressure test data of the airtight system every preset time interval until the pressure difference between the internal and external air pressure of the airtight system reaches the second preset air pressure value, and then stop recording to obtain the internal and external air pressure test data at each preset time.

[0088] In this embodiment, a pressure measuring element is arranged inside the constant-volume airtight system, and the airtight system is connected to the air supply circuit to establish a positive pressure inside the sealed gas tank to a preset value P. cail The internal air pressure reaches the preset value P. cail Then, close the gas supply valve. The airtight system now only allows gas exchange with the external environment through the venting element. Simultaneously with closing the valve, begin recording the cumulative change in internal air pressure over time until the internal air pressure approaches ambient pressure.

[0089] It should be noted that the interval for recording the cumulative change of internal air pressure over time includes, but is not limited to, the selected time intervals of 1s and 0.5s, which can be set according to the actual analysis needs.

[0090] S103. Based on the amount of gas particle loss, obtain the current internal air pressure of the airtight system after running for a second preset time, store the current internal air pressure, and obtain the current external air pressure based on the current internal air pressure and the position of the airtight system. Execute a cyclic process based on the current internal air pressure and the current external air pressure until the preset number of cycles is reached, stop the cycle, and store the current internal air pressure obtained in each cycle.

[0091] In this embodiment, when the state iterates from time t to time t+Δt, the reduction in internal gas particles ΔN in the airtight system is calculated according to the gas state equation. state According to the law of conservation of mass, the amount of gas particle loss equals the amount of internal gas particle reduction, yielding the gas pressure at time t+Δt, which is the current internal gas pressure of the airtight system after operating for the second preset time. The internal gas pressure P at time t+Δt is then obtained. it+Δt If the iteration process does not reach the termination condition, the air pressure at time t+Δt is stored, and the calculation continues based on the obtained current internal air pressure until the iteration termination condition is reached, thus obtaining the current internal air pressure at each iteration.

[0092] In one embodiment, the current internal pressure of the airtight system after a second preset time of operation is obtained based on the amount of gas particle loss, including:

[0093] Based on the gas state equation, the gas particle number change function of the airtight system after the second preset time of operation is constructed according to the actual internal air pressure.

[0094] After simultaneously calculating the gas particle loss and gas particle number change functions, the current internal air pressure of the airtight system after a second preset time is obtained, where the second preset time is greater than the first preset time.

[0095] In this embodiment, the reduction in internal gas particles ΔN in the airtight system is calculated based on the gas state equation. state This is the function of gas particle number change. Based on calibration data, the amount of gas particles lost from the pressure balance element can be determined. According to the law of conservation of mass, this makes ΔN... state =ΔN fit Based on this, the internal air pressure P at time t can be determined. it and P 0t Under the condition that the internal air pressure P at time t+Δt is obtained by iterative calculation. it+Δt .

[0096] It should be noted that the first preset time refers to the time when the airtight system operates up to time t, and the second preset time refers to the time when the airtight system operates up to time t+Δt.

[0097] In one embodiment, based on the gas state equation, a gas particle number change function of the airtight system after operating for a second preset time is constructed according to the actual internal gas pressure, including:

[0098] Inputting the actual internal gas pressure into the gas state equation yields the number of the first gas particles, where the expression for the number of the first gas particles is:

[0099]

[0100] In the formula, N act,t P represents the number of gas particles in the airtight system after the first preset time of operation. it T represents the actual internal air pressure. t R is the gas temperature after the airtight system has been running for the first preset time, and V is the universal gas constant. act The gas volume of the airtight system after the first preset operating time;

[0101] Based on the gas law, a gas particle number change function is constructed using the first gas particle number, after the airtight system has been running for a second preset time. The expression for the gas particle number change function is:

[0102]

[0103] In the formula, N act,t P represents the number of gas particles in the airtight system after the first preset time of operation. it+Δt T represents the internal air pressure of the airtight system after the second preset operating time. t+Δt The gas temperature of the airtight system after the second preset operating time is given by R, where R is the universal gas constant, and V is the gas temperature. act This refers to the gas volume of the airtight system after the second preset operating time.

[0104] In this embodiment, the actual internal air pressure of the airtight system at time t is P. it The actual external air pressure is P. 0t Using the gas law, the number of gas particles at time t is calculated, where the number of gas particles at time t is:

[0105]

[0106] In the formula, N act,t P represents the number of gas particles at time t. it T represents the actual internal air pressure. tLet V be the gas temperature of the airtight system at time t, R be the universal gas constant, and V be the gas temperature. act Let be the gas volume of the airtight system at time t.

[0107] Therefore, when the airtight system reaches time t+Δt, the number of gas particles at time t+Δt should be:

[0108]

[0109] In the formula, N act,t Let P be the number of the first gas particles in the airtight system at time t+Δt. it+Δt Let T be the internal air pressure of the airtight system at time t+Δt. t+Δt Let V be the gas temperature of the airtight system at time t+Δt, R be the universal gas constant, and V be the gas temperature. act Let be the gas volume of the airtight system at time t+Δt.

[0110] It should be noted that the first preset time refers to the time when the airtight system operates up to time t, and the second preset time refers to the time when the airtight system operates up to time t+Δt.

[0111] In one embodiment, the cyclic process is performed based on the current internal air pressure and the current external air pressure, including:

[0112] The updated actual pressure difference is obtained based on the current internal and external air pressures;

[0113] Based on the updated actual pressure difference and the volume of the airtight system, the new gas particle loss of the airtight system is calculated using the constructed internal and external pressure difference fitting function and the internal and external pressure difference derivative function.

[0114] Based on the amount of gas particle loss, the new current internal air pressure of the airtight system after a preset operating time is obtained. The new current internal air pressure is stored, and the new current external air pressure is obtained based on the new current internal air pressure and the location of the airtight system.

[0115] The steps involve determining the new current internal air pressure and the new current external air pressure, storing them, and then returning to obtain the updated actual pressure difference based on the current internal and external air pressures.

[0116] In this embodiment, as Figure 3 As shown, P is set according to the trend of air pressure change. it P 0t A small difference (such as 0.001 kPa) exists between the two values, which serves as the starting point for iteration. Figure 3 The steps in the flowchart iteratively solve a series of internal air pressures P at set time intervals. it+Δt .

[0117] Specifically, the internal air pressure P at time t+Δt during iteration. it+Δt Determine if the iteration process has reached the termination condition. If not, store the air pressure at time t+Δt, and then initialize the next iteration condition to t+Δt→t. it+Δt →P it The amount of gas particle loss is obtained based on the new actual internal air pressure and the actual external air pressure. Based on the amount of gas particle loss, the new current internal air pressure of the airtight system is obtained and stored until the iteration termination condition is met to obtain the stored current internal air pressure sequence.

[0118] It should be noted that the time interval is set according to the actual change in external environmental pressure and the scenario. For example, it can be calculated as 20ms, 50ms, 100ms, 200ms, 500ms or other duration intervals.

[0119] S104. Perform fitting analysis on multiple stored current internal air pressures to obtain the maximum or minimum internal air pressure of the airtight system, and the time corresponding to the maximum or minimum value.

[0120] In this embodiment, after obtaining a series of internal air pressures P it+Δt Then, the difference between the internal and external air pressure values ​​is the internal air pressure value relative to the external environment. By performing statistical analysis or function fitting analytical analysis on the data corresponding to the internal air pressure curve, the internal air pressure extreme values ​​under different numbers of balancing elements and the time corresponding to the internal air pressure reaching the threshold can be obtained.

[0121] This invention performs differential processing on the airtight system process, analyzes the equilibrium state between physical parameters such as gas volume, flow rate, pressure, and velocity under time infinitesimal elements, and directly calculates the pressure in the sealed space, resulting in more accurate calculation results. Furthermore, it can be iterated in complex airtight systems (such as the sealing system in an air passenger cabin), making it highly adaptable.

[0122] The pressure balance analysis device for airtight systems provided in this embodiment of the invention, such as... Figure 4 As shown, Figure 4 The block diagram of the pressure balance analysis device for an airtight system includes:

[0123] The acquisition module 401 is used to acquire the actual internal air pressure and actual external air pressure of the airtight system after running for a first preset time;

[0124] The first calculation module 402 is used to obtain the actual pressure difference based on the actual internal air pressure and the actual external air pressure, and to calculate the amount of gas particles lost by the airtight system after running for a second preset time by using the constructed internal and external pressure difference fitting function and internal and external pressure difference derivative function based on the actual pressure difference and the volume of the airtight system.

[0125] The second calculation module 403 is used to obtain the current internal air pressure of the airtight system after running for a second preset time based on the amount of gas particle loss, store the current internal air pressure and obtain the current external air pressure based on the current internal air pressure and the position of the airtight system, execute a loop process based on the current internal air pressure and the current external air pressure until the preset number of loops is reached, stop the loop and store the current internal air pressure obtained in each loop.

[0126] Analysis module 404 is used to perform fitting analysis on multiple stored current internal pressures to obtain the maximum or minimum internal pressure of the airtight system, as well as the time corresponding to the maximum or minimum value.

[0127] The specific implementation of the pressure balance analysis device for airtight systems is basically the same as the specific implementation of the pressure balance analysis method for airtight systems described above, and will not be repeated here.

[0128] In one embodiment of this application, a computer device is provided, which includes a memory and a processor. The memory stores a computer program, and the processor executes the computer program to implement the above steps. The implementation principle and technical effects of the computer device provided in this embodiment are similar to those of the above method embodiments, and will not be repeated here.

[0129] In one embodiment of this application, a computer-readable storage medium is provided, on which a computer program is stored, and when the computer program is executed by a processor, it performs the above steps; the implementation principle and technical effects of the computer-readable storage medium provided in this embodiment are similar to those of the above method embodiments, and will not be repeated here.

[0130] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0131] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above descriptions are merely specific embodiments of the present invention and are not intended to limit the scope of protection of the present invention. In particular, it should be noted that any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention for those skilled in the art.

Claims

1. A method for pressure balance analysis of an airtight system, characterized in that, include: Obtain the actual internal and external air pressure of the airtight system after it has been running for a first preset time; Based on the actual internal air pressure and the actual external air pressure, the actual pressure difference is obtained, and an internal and external pressure difference fitting function is constructed. The actual pressure difference is input into the internal and external pressure difference fitting function for calculation to obtain the actual time. Based on the actual time, the internal and external pressure difference derivative function and the volume of the airtight system, the particle throughput is obtained. Based on the particle throughput, the amount of gas particles lost by the airtight system after running for a second preset time is calculated. Based on the amount of gas particle loss, the current internal air pressure of the airtight system after running for a second preset time is obtained. The current internal air pressure is stored, and the current external air pressure is obtained based on the current internal air pressure and the position of the airtight system. The loop process is executed based on the current internal air pressure and the current external air pressure until a preset number of loops is reached. The loop is stopped, and the current internal air pressure obtained in each loop is stored. By performing a fitting analysis on multiple stored current internal air pressures, the maximum or minimum internal air pressure of the airtight system is obtained, as well as the time corresponding to the maximum or minimum value.

2. The pressure balance analysis method for an airtight system as described in claim 1, characterized in that, The expression for the amount of gas particle loss is: ΔN fit =Δt*K fit In the formula, ΔN fit K represents the amount of gas particles lost. fit Δt represents the particle throughput rate, and Δt is the difference between the second preset time and the first preset time of operation of the airtight system.

3. The pressure balance analysis method for an airtight system as described in claim 2, characterized in that, The internal and external pressure difference fitting function and the internal and external pressure difference derivative function are obtained by testing the airtight system, including: Obtain the air permeable area of ​​the air permeable element, and obtain the internal air pressure test data and external air pressure test data of the airtight system connected to the air permeable element at multiple preset times; Based on the internal air pressure test data and the external air pressure test data, the test pressure difference at each preset time is obtained, and the internal and external pressure difference fitting function is obtained by fitting the test pressure difference at each preset time. The derivative of the internal and external pressure difference fitting function is obtained by taking the derivative of the internal and external pressure difference function.

4. The pressure balance analysis method for an airtight system as described in claim 3, characterized in that, The acquisition of internal and external air pressure test data of the airtight system connected to the breathable element at multiple preset times includes: Gas is introduced into the airtight system until the internal pressure of the airtight system reaches a first preset pressure value, at which point the gas input stops. Record the internal and external air pressure test data of the airtight system every preset time interval until the pressure difference between the internal and external air pressure of the airtight system reaches a second preset air pressure value, and then stop recording to obtain the internal and external air pressure test data at each preset time.

5. The pressure balance analysis method for an airtight system as described in claim 1, characterized in that, The step of obtaining the current internal air pressure of the airtight system after a second preset time of operation based on the amount of gas particle loss includes: Based on the gas state equation, the gas particle number change function of the airtight system after running for a second preset time is constructed according to the actual internal air pressure. After simultaneously calculating the amount of gas particle loss and the function of gas particle number change, the current internal air pressure of the airtight system after running for a second preset time is obtained, wherein the second preset time is greater than the first preset time.

6. The pressure balance analysis method for an airtight system as described in claim 5, characterized in that, The method of constructing the gas particle number change function of the airtight system after a second preset time of operation based on the gas state equation and the actual internal gas pressure includes: Inputting the actual internal air pressure into the gas state equation yields the number of first gas particles, where the expression for the number of first gas particles is: In the formula, N act,t P represents the number of first gas particles in the airtight system after operating for a first preset time. it T represents the actual internal air pressure. t R is the gas temperature of the airtight system after operating for a first preset time, and V is the universal gas constant. act The gas volume of the airtight system after operating for a first preset time; Based on the gas law, a gas particle number change function is constructed using the first gas particle count to obtain the gas-tight system after operating for a second preset time. The expression for the gas particle number change function is: In the formula, N act,t P represents the number of first gas particles after the airtight system has been running for a first preset time. it+Δt T represents the internal air pressure of the airtight system after operating for a second preset time. t+Δt The gas temperature of the airtight system after a second preset time of operation, R is the universal gas constant, and V is the gas temperature. act+Δt The gas volume of the airtight system after a second preset time of operation.

7. The pressure balance analysis method for an airtight system as described in claim 1, characterized in that, The process of performing a cycle based on the current internal air pressure and the current external air pressure includes: The updated actual pressure difference is obtained based on the current internal air pressure and the current external air pressure; Based on the updated actual pressure difference and the volume of the airtight system, the new gas particle loss of the airtight system is calculated using the constructed internal and external pressure difference fitting function and the internal and external pressure difference derivative function. Based on the amount of gas particle loss, the new current internal air pressure of the airtight system after a preset operating time is obtained. The new current internal air pressure is stored, and a new current external air pressure is obtained based on the new current internal air pressure and the position of the airtight system. After determining the new current internal air pressure as the current internal air pressure and determining the new current external air pressure as the current external air pressure and storing them, the process returns to the step of obtaining the updated actual pressure difference based on the current internal air pressure and the current external air pressure.

8. A pressure balance analysis device for an airtight system, characterized in that, include: The acquisition module is used to acquire the actual internal air pressure and actual external air pressure of the airtight system after running for a first preset time; The first calculation module is used to obtain the actual pressure difference based on the actual internal air pressure and the actual external air pressure, construct an internal and external pressure difference fitting function, input the actual pressure difference into the internal and external pressure difference fitting function for calculation, obtain the actual time, obtain the particle throughput based on the actual time, the internal and external pressure difference derivative function and the volume of the airtight system, and calculate the amount of gas particles lost by the airtight system after running for a second preset time based on the particle throughput. The second calculation module is used to obtain the current internal air pressure of the airtight system after running for a second preset time based on the amount of gas particle loss, store the current internal air pressure and obtain the current external air pressure based on the current internal air pressure and the position of the airtight system, perform a loop process based on the current internal air pressure and the current external air pressure until a preset number of loops is reached, stop the loop and store the current internal air pressure obtained in each loop. The analysis module is used to perform fitting analysis on multiple stored current internal air pressures to obtain the maximum or minimum value of the internal air pressure of the airtight system, and the time corresponding to the maximum or minimum value.

9. A computer device, characterized in that, include: Memory, used to store computer programs; A processor is configured to implement the pressure balance analysis method for an airtight system as described in any one of claims 1 to 7 when executing the computer program.

10. A storage medium, characterized in that, The storage medium stores a computer program, which, when executed by a processor, implements the pressure balance analysis method for airtight systems as described in any one of claims 1 to 7.

Images