Suspension air supply module drying recovery capability test method

Abstract

The invention provides a method for testing the drying recovery capability of a suspension air supply module. The method comprises the following steps: constructing a test air path among an environment box, a dryer, an air storage tank and a wheel cylinder; blowing an equipment pipeline and a gas storage tank by using dry gas; a pressure pump is started, wet air in the environment box flows through a dryer and is filled into an air storage tank to reach a set dew point value of a product, and the gas consumption after inflation is recorded; dry gas is used for inflation from the reverse direction of the dryer, an exhaust electromagnetic valve is opened, and drying is completed; the pressure pump is started, wet air in the environment box flows through the dryer and is filled into the air storage tank until the dew point value reaches the dew point recovery value of the product, and the total amount of gas reversely blown by the dry gas represents the drying recovery capacity. The method provided by the invention aims to solve the problems that the dryer recovery capability test is not systematic and inaccurate and the automation degree is low in the prior art, and the test logic can be automatically adjusted according to requirements under the condition of hardware permission so as to facilitate flexible test.

Description

Technical Field

[0001] This invention relates to the field of intelligent testing technology for automotive parts, and mainly to a method for testing the drying recovery capability of a suspension air supply module. Background Technology

[0002] Air suspension systems are crucial for enhancing comfort and stability in modern automobiles, especially high-end commercial and passenger vehicles. The air supply module (ASU) is the heart of the air suspension system, responsible for providing clean, dry compressed air. The dryer within it removes moisture from the compressed air, preventing ice formation that could clog pipes or corrode components, and is critical to the system's reliability and durability. Once the dryer becomes saturated with moisture, it needs a regeneration process to restore its adsorption capacity; the strength of this regeneration directly affects the ASU's maintenance cycle and long-term performance.

[0003] Currently, testing of ASU dryers mainly focuses on their initial drying efficiency or static adsorption capacity, lacking systematic and automated testing methods for their dynamic recovery capability, a dynamic and cyclical characteristic. Existing methods are often cumbersome to operate, rely on manual judgment, have poor controllability of test conditions, and produce incomplete data records. They are also difficult to accurately quantify the performance degradation of the dryer after multiple adsorption-regeneration cycles, and cannot accurately assess the impact of different regeneration parameters (such as purge gas volume and flow rate) on the recovery effect.

[0004] The foregoing background information is intended to help those skilled in the art understand prior art that is similar to the present invention, and to facilitate the understanding of the inventive concept and technical solution of the present invention. It should be clearly stated that, in the absence of clear evidence that the above content was disclosed before the filing date of this patent application, the foregoing background information should not be used to evaluate the novelty of the technical solution of this application. Summary of the Invention

[0005] Technical issues To address the aforementioned issues, the present invention aims to provide a method and system for testing the drying recovery capability of a suspension air supply module. This system addresses the problems of unsystematic, inaccurate, and low-automation testing of dryer recovery capability in existing technologies. It allows for flexible testing by adjusting the test logic as needed, provided the hardware allows. Furthermore, it enables functions such as saving, copying, and switching test methods for repeated testing. Test data is automatically saved, allowing users to retrieve and view past data conclusions at any time. The software also supports data export, facilitating further data processing and analysis.

[0006] Technical solution Option 1, a method for testing the drying recovery capability of a suspension air supply module, includes the following steps: Constructing a test gas path: Receive control commands from the bus testing tool, the control commands being used to control the opening and closing of the pneumatic control valve and / or solenoid valve and / or pressure pump, and construct a test gas path including the environmental chamber, dryer, air tank, and wheel cylinder; Dry gas purging: Use dry gas to purge the equipment pipelines and gas tanks, and record the initial dew point value; Humid air test: The target humidity and temperature environment is simulated by an environmental chamber. The pressure pump is started so that the humid air in the environmental chamber flows through the dryer and fills the storage tank to the product's set dew point value. The amount of gas consumed after filling is recorded. Drying gas reverse purging: Use drying gas to purge from the reverse side of the dryer and open the exhaust solenoid valve to complete the drying process; Humid air retest: Start the pressure pump to allow humid air in the environmental chamber to flow through the dryer and fill the storage tank until the dew point value reaches the product's dew point recovery value. Count the total amount of drying gas purging in the reverse direction. The smaller the total amount, the higher the dryer's recoverability.

[0007] Furthermore, in the step of constructing the test gas path, the receiving control command specifically includes: receiving binary encoded commands to control the opening and closing of multiple pneumatic valves and solenoid valves, as well as the working state of the pressure pump, so as to switch and form different gas path paths.

[0008] Furthermore, in the step of constructing the test gas path, the test gas path is constructed using a modular gas path board. The modular gas path board integrates multiple sets of pneumatic valve groups controlled by the binary coded instructions to realize at least four gas path modes, including initial drying, test charging, reverse regeneration, and system exhaust.

[0009] Furthermore, in the step of constructing the test gas circuit, the modular gas circuit board is integrated with an emergency exhaust valve, which automatically releases pressure when the pressure exceeds the preset pressure relief value.

[0010] Furthermore, in the step of constructing the test gas path, the preset pressure relief value is 25 bar.

[0011] Furthermore, in the drying gas purging step, an initial drying gas path is constructed before purging, including a drying gas source, a dryer to be tested, and a gas storage tank.

[0012] Furthermore, in the drying gas purging step, the atmospheric dew point of the drying gas is -40℃ to -60℃.

[0013] Furthermore, in the dry gas purging step, the purging specifically includes: The electronic proportional valve is used to set the purging pressure within the range of 0.5 to 10 bar. Continue purging until the dew point inside the gas storage tank stabilizes between -40°C and -70°C.

[0014] Furthermore, in the humid air testing step, the simulation of the target humidity and temperature environment using an environmental chamber specifically includes: The humidity range is controlled within the environmental chamber to be 0% to 100%, preferably 5% to 95%, more preferably 10% to 95%; the temperature range is -60°C to 85°C, preferably -40°C to 85°C, more preferably -30°C to 60°C.

[0015] Furthermore, in the humid air testing step, the ambient dew point is calculated based on temperature and humidity data, with an accuracy of ±0.5℃.

[0016] Furthermore, in the humid air testing procedure, the process of allowing the humid air in the environmental chamber to flow through the dryer and be filled into the storage tank specifically includes: Control the pressure pump to charge the gas storage tank at a constant flow rate of 5-20 L / min; After inflation is complete, the solenoid valve will close 0.5 to 2 seconds later.

[0017] Furthermore, in the humid air testing step, the product is set to a dew point value of -20℃ to -60℃.

[0018] Furthermore, during the humid air test, when the humid air in the environmental chamber flows through the dryer and fills the storage tank, the solenoid valve at the rear end of the storage tank remains open to ensure that the pressure in the storage tank tends to stabilize.

[0019] Furthermore, in the reverse purging step of the dry gas, the reverse inflation specifically includes: Back purging is performed using dry gas at a constant or variable flow rate; Detect the dew point value at the dryer outlet section and stop purging when it reaches the product recovery value.

[0020] Furthermore, in the reverse purging step of the drying gas, the constant flow rate is 0.1 L / min to 20 L / min.

[0021] Furthermore, in the humid air retesting step, the simulation of the target humidity and temperature environment using an environmental chamber specifically includes: The humidity range is controlled within the environmental chamber to be 0% to 100%, preferably 5% to 95%, more preferably 10% to 95%; the temperature range is -60°C to 85°C, preferably -40°C to 85°C, more preferably -30°C to 60°C.

[0022] Furthermore, in the humid air retest step, the ambient dew point is calculated based on temperature and humidity data, with an accuracy of ±0.5℃.

[0023] Furthermore, in the humid air retesting step, the process of allowing the humid air in the environmental chamber to flow through the dryer and fill the storage tank specifically includes: Control the pressure pump to charge the gas storage tank at a constant flow rate of 5-20 L / min; After inflation is complete, the solenoid valve will close 0.5 to 2 seconds later.

[0024] Furthermore, in the humid air retesting step, the product dew point recovery value is -20℃ to -60℃.

[0025] Furthermore, during the humid air retesting step, when the humid air in the environmental chamber flows through the dryer and fills the storage tank, the solenoid valve at the rear end of the storage tank remains open to ensure that the pressure in the storage tank tends to stabilize.

[0026] Furthermore, this also includes automated data processing: Real-time acquisition and storage of gas pressure, flow rate, dew point, temperature, and valve status data; Automatically generate the dew point curve of the gas storage tank over time and the cumulative gas consumption curve; Based on the aforementioned change curve, the algorithm automatically identifies the inflection point of dew point change, determines the point of depletion of drying capacity in the dry gas reverse purging step, and the point of recovery completion in the humid air retesting step.

[0027] Furthermore, in the automated data processing steps, a sliding window algorithm is used to identify the inflection point of dew point change and eliminate environmental interference.

[0028] Option 2: A suspension air supply module drying recovery capability testing system, used to implement the method described in Option 1 above, comprising: The central control unit is used to run the test software and send control commands. The environmental simulation module, including an environmental chamber and temperature and humidity sensors, is used to provide a controllable simulated environmental air source; The pneumatic circuit execution module includes a pressure pump, multiple solenoid valves, a pneumatic control valve, an electronic proportional valve, and a gas storage tank, which are used to respond to the control commands and construct different test pneumatic circuits. The data acquisition module, including a pressure sensor, flow meter, and dew point sensor, is used to collect various parameters during the testing process. The data recording and analysis module is communicatively connected to the data acquisition module and is used to record data, generate curves, and execute analysis algorithms.

[0029] Option 3: A computer device comprising a memory, a processor, a communication interface, and a communication bus; wherein the memory, processor, and communication interface communicate with each other via the communication bus; the memory stores computer programs; the processor executes the computer programs stored in the memory, and when the processor executes the computer programs, it implements the suspension air supply module drying recovery capability test method described in Option 1.

[0030] A computer-readable storage medium having a computer program stored thereon, wherein the computer program, when executed by a processor, implements the suspension air supply module drying recovery capability test method described in the aforementioned scheme 1.

[0031] Based on common knowledge in the field, the above-mentioned preferred conditions can be combined to obtain specific implementation methods.

[0032] Beneficial effects According to this invention, a systematic, cyclical, and quantitative test of the recovery capability of an ASU dryer is achieved through integrated environmental simulation, programmable gas path switching, reverse regeneration purging, and automated data acquisition and analysis throughout the entire process. It not only tests the initial drying capacity but also focuses on the critical recovery capability. Through a complete adsorption, reverse regeneration, and re-adsorption cycle, it realistically simulates the actual operating conditions of the dryer, quantitatively evaluating its performance degradation and regeneration efficiency. Software commands control the opening and closing of all valves, automatically completing complex gas path construction, test parameter setting, process control, and data recording and storage, reducing human error and improving testing efficiency and consistency. Users can customize parameters such as ambient temperature and humidity, purging pressure and flow rate, regeneration gas parameters, and product dew point recovery value as needed, facilitating the study of the dryer's recovery performance under different conditions. Key parameter curves are automatically generated, and intelligent algorithmic analysis provides accurate data support for product design improvement, lifespan prediction, and quality control. Integrated emergency pressure relief and other safety mechanisms ensure the safety of the high-pressure testing process.

[0033] The present invention adopts the above-mentioned technical solution to achieve the above objectives, which makes up for the shortcomings of the prior art, is reasonably designed, and is easy to operate. Attached Figure Description

[0034] To make the above and / or other objects, features, advantages and examples of the present invention more apparent and understandable, the accompanying drawings used in the specific embodiments of the present invention will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0035] Figure 1 This diagram illustrates the gas flow path for dry air displacement. Figure 2 This diagram shows the gas path for the drying recovery capability test. Figure 3 This is a schematic diagram of a product designed to test drying capacity.

[0036] Among them, QV01~QV19 represent pneumatic control valves; T1&H1~T6&H6 represent temperature and humidity meters; P1~P6 represent equipment pressure sensors used to detect pressure changes; I-U1~I-U4 represent grating rulers; I-M1~I-M4 represent regulating motors; ID1 represents the equipment dryer, using the model number ID; A1, A2 represent pressure gauges; V1, V2 represent one-way valves; AS1, AS2 represent current sensors; FL, FR, RL, RR represent the left front wheel cylinder, right front wheel cylinder, left rear wheel cylinder, and right rear wheel cylinder, respectively; AD represents the product dryer (Air Dryer) for easy differentiation from the equipment dryer ID1; EV represents the exhaust valve (Exhaust value); P / U represents the product's internal temperature / pressure sensor, capable of simultaneously outputting temperature and pressure; CM represents the compressor motor; SV1~SV4 represent switching valves (Switching Value); AV1~AV4 represent air valves (Air... Value), AV1 to AV4 are connected to the four wheel ends respectively. Detailed Implementation

[0037] Those skilled in the art can refer to the content of this document and appropriately replace and / or modify the process parameters to achieve the desired results. However, it should be particularly noted that all similar replacements and / or modifications are obvious to those skilled in the art and are considered to be included in this invention. The products and preparation methods described in this invention have been described through preferred examples, and those skilled in the art can obviously modify or appropriately change and combine the products and preparation methods described herein without departing from the content, spirit, and scope of this invention to realize and apply the technology of this invention.

[0038] Unless otherwise defined, the technical and scientific terms used herein have the same meanings as commonly understood by one of ordinary skill in the art to which this invention pertains. This invention uses the methods and materials described herein; however, other suitable methods and materials known in the art may also be used. The materials, methods, and examples described herein are illustrative only and are not intended to be limiting. All publications, patent applications, patent cases, provisional applications, database entries, and other references mentioned herein are incorporated herein by reference in their entirety. In case of conflict, the definitions included in this specification shall prevail.

[0039] Unless otherwise specified, the materials, methods, and examples described herein are exemplary and not limiting. While similar or equivalent methods and materials can be used to implement or test the invention, suitable methods and materials are described herein.

[0040] The technical solutions in the embodiments of the present invention will be clearly and completely described below. 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. Furthermore, in the absence of conflict, the embodiments and features in the embodiments of this application can be combined with each other.

[0041] It should be understood that none of the technical solutions claimed in this invention relate to the diagnosis and treatment of diseases.

[0042] To facilitate understanding of the embodiments of the present invention, the abbreviations and key terms that may be involved in the embodiments of the present invention will first be explained or defined. For undefined abbreviations or key terms, they are all conventionally understood by those skilled in the art.

[0043] Furthermore, unless otherwise specified, the experimental methods used in the embodiments are conventional methods; the materials and reagents used are commercially available unless otherwise specified. Reagents or instruments whose manufacturers are not specified are all commercially available products. All disclosures and other references mentioned herein are incorporated herein by reference in their entirety.

[0044] The present invention is described in detail below. Example 1: A suspension air supply module drying recovery capability testing system is provided. Its hardware architecture mainly includes: a central control unit, an environmental simulation module, an air path execution module, a data acquisition module, and a data recording and analysis module, as detailed below.

[0045] The central control unit is used to run self-developed modular test programs, such as industrial computers equipped with test software.

[0046] The environmental simulation module is a high-precision constant temperature and humidity environment chamber, used to provide a stable and adjustable humid air source to simulate complex actual working conditions.

[0047] The pneumatic circuit actuator module adopts a modular pneumatic circuit board design, which integrates a pressure pump, an air tank, multiple two-position three-way solenoid valves (such as SV4, EV), pneumatic control valves (such as the QV series), electronic proportional valves, throttle valves, and pressure relief valves. The on / off state of all valves is controlled by the central control unit via a digital I / O card.

[0048] The data acquisition module is used to collect various parameters during the test process through various sensors, including pressure sensors, mass flow meters, temperature sensors, and high-precision dew point sensors installed at key test nodes such as the environmental chamber outlet, dryer inlet and outlet, and gas storage tank. All sensor signals are uploaded to the central control unit via the data acquisition card.

[0049] The data recording and analysis module is implemented by a dedicated module within the testing software, responsible for real-time data display, storage, historical query, curve plotting, and report generation.

[0050] The system testing logic is presented through a graphical interface by the testing software, allowing users to create, edit, save, and recall different recovery capability test schemes. A complete recovery capability test scheme should at least include multiple stages such as initial drying, adsorption, reverse regeneration, and re-adsorption testing. Within each stage, users can set target parameters (such as pressure, flow rate, dew point threshold, and time) and action logic (such as valve opening and closing sequences). The testing software compiles the user scheme into a low-level sequence of equipment control commands and data acquisition tasks.

[0051] Example 2: A method for testing the drying recovery capability of a suspension air supply module is provided, such as... Figures 1-3 As shown, the specific steps are as follows.

[0052] Step 1, as follows Figure 1 As shown, a dry gas replacement gas path is constructed. Commands are sent to control the energization and opening of valves QV05, QV06, QV11, QV12, QV17, and QV18, while closing other valves, thus forming the "system purging gas path". The pressure pump is started, and dry gas (such as dry air) with a dew point of -60°C from the dry gas source is used to purge the entire pipeline and the RES storage tank at a pressure of 1.5 bar. Purging continues until the dew point sensor reading inside the RES tank stabilizes at -55°C; the software automatically records this value as the initial dew point T. o .

[0053] Step 2, as follows Figure 2 As shown, switch the gas path, send a command to control QV17 / QV18 to close, and open SV4 and the ambient chamber passage valves. Set the ambient chamber temperature to 25℃ and the humidity to 70%RH (calculated ambient dew point T). d (Approximately 19°C). Start the pressure pump to pump the humid air from the ambient air chamber at a flow rate of 10 L / min. After passing through the dryer in the ASU under test, the air is then filled into the RES storage tank. The exhaust valve at the rear of the tank remains open to maintain a low pressure, such as 1.5 bar. The software records the dew point T inside the RES tank in real time. r The change over time t.

[0054] Step 3, when T is detected r When the temperature rises to the preset threshold of -20°C, the dryer is determined to be saturated, and a command is issued to stop the pressure pump and shut down SV4. The total volume V of humid air accumulated from the start of inflation to the stop is calculated. w1 =120L, which is the initial drying capacity of the dryer under the current conditions.

[0055] Step 4: Switch the gas path again to form a reverse purging path. Open the valves connecting the drying gas source and the dryer outlet valve, and simultaneously open the exhaust valve EV. Set the electronic proportional valve to allow drying gas with a dew point of -60℃ to be back-purged from the dryer outlet at a fixed flow rate of 2L / min, and discharged from the inlet via EV. Record the dew point values ​​at the dryer inlet and outlet. Continue purging until the dryer outlet dew point drops and stabilizes at the set product dew point recovery value of -40℃. At this point, reverse regeneration is considered complete, and purging is stopped. Record the total purging time t. r =15min, calculate the total amount of dry gas consumed, V d =Flow rate × Time = 2L / min × 15min = 30 liters. That is, under the parameters set in this embodiment, the dryer's recovery capacity is 30 liters of dried gas. Users can determine this by monitoring the initial dew point of the gas tank, the temperature and humidity of the ambient chamber, and the dew point T inside the gas tank. r These quantitative indicators, such as threshold values, accurately assess the recovery performance of the dryer under various operating conditions. Furthermore, multiple rounds of testing can be conducted by adjusting regeneration parameters such as purge flow rate, time, and dew point of the drying gas to optimize the regeneration strategy.

[0056] Furthermore, based on steps 1 to 4 above, the software automatically repeats steps 2 and 3 to perform the moisture adsorption test again. Record the volume V of humid air consumed when the dryer reaches saturation. w2 =118L.

[0057] Performance calculation and reporting: The software automatically calculates and generates reports.

[0058] Key metrics include: Initial drying capacity: V w1 =120L, which is the total capacity of the dryer.

[0059] Regeneration consumption: V d =30L, which is the recovery capacity of the dryer. The less the total amount of drying gas consumed during regeneration and purging, the better the recovery capacity of the dryer.

[0060] Drying capacity after recovery: V w2 =118L.

[0061] Drying capacity recovery rate: η=(V w2 / V w1 )×100%=98.3%, which means that the drying capacity recovery rate of the dryer for ambient air at a temperature of 25℃ and a humidity of 70%RH is 98.3%.

[0062] Unit recovery efficiency: ε=V w2 / V d =3.93, which means that the unit recovery efficiency is approximately 3.93 liters of moisture treatment capacity can be restored for every 1 liter of dry gas consumed.

[0063] Users can use these quantitative indicators to accurately evaluate the dryer's recovery performance and conduct multiple rounds of testing by adjusting regeneration parameters such as purge flow rate, time, and dry gas dew point to optimize the regeneration strategy.

[0064] Example 3: Building upon Example 2, users can set a "cyclic test" mode via software. The system will automatically and continuously execute cycles of adsorption testing, reverse regeneration, and re-adsorption testing, for example, 100 cycles. The software records parameters such as Vw, Vd, η, and ε for each cycle and plots trend curves of these parameters changing with the number of cycles. By analyzing the decay of the curves, the performance changes of the dryer throughout its entire lifespan can be effectively predicted, providing crucial data for product lifespan design and reliability assessment.

[0065] Example 4: A computer-readable storage medium is also provided, which stores a computer program that can be executed by a processor. When the computer program is executed by the processor, it runs the aforementioned suspension air supply module drying recovery capability test method and can achieve the same technical effect. To avoid repetition, this embodiment will not describe it again.

[0066] Example 5: A computer device includes a memory, a processor, a communication interface, and a communication bus; wherein the memory, processor, and communication interface communicate with each other through the communication bus; the memory is used to store computer programs; the processor is used to execute the computer programs stored in the memory, and when the processor executes the computer programs, it implements the aforementioned suspension air supply module drying recovery capability test method and achieves the same technical effect. To avoid repetition, this embodiment will not elaborate further.

[0067] Computer-readable media include both permanent and non-permanent, removable and non-removable media, which can store information using any method or technology. Information can be computer-readable instructions, data structures, modules of programs, 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, CD-ROM, digital versatile optical disc (DVD) or other optical storage, magnetic tape, magnetic magnetic disk storage or other magnetic storage devices, or any other non-transferable medium that can be used to store information accessible by a computing device. As defined herein, computer-readable media does not include transient computer-readable media, such as modulated data signals and carrier waves.

[0068] The conventional techniques described in the above embodiments are existing technologies known to those skilled in the art, and therefore will not be described in detail here.

[0069] The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

[0070] Although the present invention has been described in detail and specific embodiments have been cited, it will be apparent to those skilled in the art that various changes or modifications can be made without departing from the spirit and scope of the invention.

[0071] While the foregoing detailed descriptions have shown, described, and pointed out novel features applicable to various embodiments, it should be understood that various omissions, substitutions, and changes may be made to the form and details of the described apparatus or methods without departing from the spirit of this disclosure. Furthermore, the various features and methods described above may be used independently of each other or may be combined in various ways. All possible combinations and sub-combinations are intended to fall within the scope of this disclosure. Many of the foregoing embodiments include similar components, and therefore, these similar components are interchangeable in different embodiments. Although the invention has been disclosed in the context of certain embodiments and examples, those skilled in the art will understand that the invention extends beyond the specifically disclosed embodiments to other alternative embodiments and / or applications, as well as their obvious modifications and equivalents. Therefore, the invention is not intended to be limited to the specific disclosure of the preferred embodiments herein.

[0072] All matters not covered in this invention are common knowledge.

Claims

1. A method of testing the dry recovery capability of a suspension air supply module, characterized by The method comprises the following steps: Constructing a test gas circuit: receiving control instructions from a bus detection tool, the control instructions being used to control the opening and closing of pneumatic valves and / or solenoid valves and / or pressure pumps, and constructing a test gas circuit including the environment box, the dryer, the gas storage tank, and the wheel cylinder; Dry gas purging: using dry gas to purge the equipment pipeline and the gas storage tank, and recording the initial dew point value; Wet air test: simulating the target humidity and temperature environment by the environment box, starting the pressure pump, and making the wet air in the environment box flow through the dryer and be filled into the gas storage tank to the product set dew point value, and recording the consumed gas amount after the filling is completed; Dry gas reverse purging: using dry gas to perform reverse filling from the dryer, and opening the exhaust solenoid valve, and completing the drying; Wet air retest: starting the pressure pump, and making the wet air in the environment box flow through the dryer and be filled into the gas storage tank to the product dew point recovery value, and counting the total amount of dry gas reverse purging, and the smaller the total amount is, the higher the recovery of the dryer is.

2. The method of claim 1, wherein: In the step of constructing a test gas circuit, the receiving of control instructions specifically comprises: receiving binary coded instructions to control the opening and closing of a plurality of pneumatic valves and solenoid valves and the working state of a pressure pump, so as to switch to form different gas circuit paths.

3. The method of claim 1 or 2, wherein: The construction of the test gas circuit adopts a modular gas circuit board, and a plurality of groups of pneumatic valve groups controlled by the binary coded instructions are integrated on the modular gas circuit board, and are used to realize four kinds of gas circuit modes including initial drying, test filling, reverse regeneration, and system exhaust.

4. The method of claim 1, wherein: In the step of dry gas purging, the purging specifically comprises: Controlling the electronic proportional valve to set the purging pressure in the range of 0.5-10 bar; Continuously purging until the dew point in the gas storage tank is stabilized at-40℃ to-70℃.

5. The method of claim 1, wherein: In the step of wet air test, the simulating of the target humidity and temperature environment by the environment box specifically comprises: Controlling the humidity range of the environment box to be 0%-100%, and the temperature range to be-60℃ to 85℃.

6. The method of claim 1, wherein: In the step of wet air test, the making of the wet air in the environment box flow through the dryer and be filled into the gas storage tank specifically comprises: Controlling the pressure pump to fill the gas storage tank at a constant flow rate of 5-20 L / min to the set dew point value of-20℃ to-60℃; Delaying 0.5-2 s to close the solenoid valve after the filling is completed.

7. The method of claim 1, wherein: In the step of dry gas reverse purging, the reverse filling specifically comprises: Using dry gas to perform reverse purging at a constant flow rate or an inconstant flow rate; Detecting the dew point value of the outlet section of the dryer, and stopping the purging when the dew point value reaches the product recovery value.

8. The method of claim 1, further comprising a data automatic processing step: Real-time acquisition and storage of gas circuit pressure, flow rate, dew point, temperature, and valve state data; Automatic generation of the dew point change curve of the gas storage tank over time and the gas consumption cumulative curve. ​ Based on the change curve, the dew point change inflection point is automatically identified by algorithm, and the dry gas reverse blowing step dry capacity depletion point and the wet air retest step recovery completion point are determined.

9. A suspension air supply module drying recovery capacity test system, characterized in that: The system is used to realize the suspension air supply module drying recovery capacity test method of any one of claims 1-8; The system comprises: A central control unit for running test software and sending control instructions; An environment simulation module comprising an environment box and a temperature and humidity sensor for providing a controllable simulated environment air source; An air path execution module comprising a pressure pump, a plurality of electromagnetic valves, air control valves, electronic proportional valves and gas storage tanks for responding to the control instructions to build different test air paths; A data acquisition module comprising pressure sensors, flow meters and dew point sensors for collecting various parameters during the test process; A data recording and analysis module in communication connection with the data acquisition module for recording data, generating curves and executing analysis algorithms.

10. A computer device comprising a memory, a processor, a communication interface, and a communication bus; wherein, The memory, processor and communication interface communicate with each other through the communication bus; the memory is used to store computer programs; the processor is used to execute the computer programs stored on the memory, and the processor executes the computer programs to realize the suspension air supply module drying recovery capacity test method of any one of claims 1-8.

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