Temperature control air tightness detection system and vehicle detection system

Abstract

The invention discloses a temperature control air tightness detection system and a vehicle detection system.The temperature control air tightness detection system comprises a pretreatment unit and an air tightness detection unit, the pretreatment unit comprises a gas storage module, a temperature control module and a rectification module, the temperature control module is used for adjusting the temperature of compressed gas output by the gas storage module, and the rectification module is used for rectifying the temperature of the compressed gas output by the gas storage module; the rectification module is used for rectifying the compressed gas which is output by the temperature control module and subjected to temperature adjustment into laminar gas, the airtightness detection unit comprises a constant temperature box, a constant temperature module and a detection module, and the constant temperature module and the detection module are both arranged in the constant temperature box; the constant temperature module is used for keeping the temperature in the constant temperature box constant, the detection module is connected with the rectification module so as to receive laminar gas output by the rectification module, and the detection module is used for detecting the air tightness of a to-be-detected product placed in the constant temperature box. The temperature control air tightness detection system and the vehicle detection system have the advantage of high air tightness detection precision.

Description

Technical Field

[0001] The present invention relates to the technical field of air tightness detection, and in particular to a temperature-controlled air tightness detection system and a vehicle detection system. Background Art

[0002] An increasing number of automotive products involve sealing, such as water-cooled controllers and battery packs, and the requirements for sealing and reliability are becoming increasingly stringent. Common methods for testing airtightness include gas testing, water testing, nitrogen-hydrogen testing, or helium testing. Of these methods, gas testing is the most efficient and the lowest cost.

[0003] However, gas testing has stringent temperature requirements; a temperature fluctuation of 0.1°C can cause measurement results to vary several times. In related technologies, gas testing cannot control the temperature of the gas source, and friction between gas molecules during the inflation phase generates heat. This ultimately leads to a significant temperature difference between the gas entering the product being tested and the product being tested, resulting in significant measurement discrepancies and low detection accuracy. Summary of the Invention

[0004] The present disclosure aims to at least partially address one of the technical problems in the related art. To this end, embodiments of the present disclosure provide a temperature-controlled airtightness detection system to improve airtightness detection accuracy, and embodiments of the present disclosure also provide a vehicle detection system to improve vehicle airtightness detection accuracy.

[0005] The temperature-controlled airtightness detection system of the embodiment of the present disclosure includes a pre-processing unit and an airtightness detection unit, wherein the pre-processing unit includes a gas storage module, a temperature control module, and a rectifier module connected in sequence, wherein the gas storage module is used to store compressed gas, the temperature control module is used to adjust the temperature of the compressed gas output by the gas storage module, and the rectifier module is used to rectify the temperature-regulated compressed gas output by the temperature control module into laminar gas;

[0006] The airtightness detection unit includes a constant temperature box, a constant temperature module and a detection module. The constant temperature module and the detection module are both arranged in the constant temperature box. The constant temperature module is used to maintain the temperature in the constant temperature box constant. The detection module is connected to the rectifier module to receive the laminar gas output by the rectifier module. The detection module is used to detect the airtightness of the product to be tested placed in the constant temperature box.

[0007] In some embodiments, the temperature-controlled airtightness detection system of the embodiment of the present disclosure also includes a post-processing unit, which includes a control module. The control module is connected to the gas storage module to obtain the temperature of the compressed gas stored in the gas storage module as a first temperature. The control module is connected to the constant temperature module to obtain the temperature in the constant temperature box as a second temperature. The control module is connected to the temperature control module to control the temperature control module to adjust the compressed gas of the first temperature to the second temperature and deliver it to the detection module.

[0008] In some embodiments, the temperature control module includes a flow channel component, a temperature control device and a first temperature sensor. The flow channel component has a gas flow channel, and the inlet and outlet of the gas flow channel are respectively connected to the gas storage module and the rectifier module. The temperature control device is arranged on the flow channel component to heat or cool the compressed gas in the gas flow channel. The detection end of the first temperature sensor is arranged in the gas flow channel to detect the temperature of the compressed gas in the gas flow channel. The temperature control device and the first temperature sensor are both connected to the control module.

[0009] In some embodiments, there are multiple temperature control devices, and the multiple temperature control devices are arranged at intervals in the extension direction of the gas flow channel. There are multiple first temperature sensors, and the multiple first temperature sensors are arranged at intervals in the extension direction of the gas flow channel.

[0010] In some embodiments, the gas flow channel is arranged in a serpentine shape, and a plurality of protrusions are provided on the inner wall of the gas flow channel, and the plurality of protrusions are arranged at intervals in the circumferential direction of the gas flow channel.

[0011] In some embodiments, the detection module includes a first pipeline, a second pipeline, a standard part and a pressure differential sensor. The inlet ends of the first pipeline and the second pipeline are both connected to the rectifier module, the outlet end of the first pipeline is connected to the standard part to deliver compressed gas into the standard part, and the outlet end of the second pipeline is used to be connected to the product to be tested to deliver compressed gas into the product to be tested. The pressure differential sensor is arranged between the first pipeline and the second pipeline to detect the pressure difference between the first pipeline and the second pipeline.

[0012] In some embodiments, the detection module further includes a main pipe and a pressure gauge, the first pipeline and the second pipeline are both connected to the rectifier module through the main pipe, and the pressure gauge is provided on the main pipe.

[0013] In some embodiments, the pre-processing unit also includes an air supply module and a pressure regulating module. The air supply module is connected to the air storage module through the pressure regulating module. The pressure regulating module is used to regulate the pressure of the compressed gas output by the air supply module and then deliver it to the air storage module.

[0014] In some embodiments, the pre-processing unit further includes a cleaning module, which is disposed between the air supply module and the pressure regulating module. The cleaning module is used to at least dry and remove impurities from the compressed gas output by the air supply module and then deliver it to the pressure regulating module.

[0015] In some embodiments, the airtightness detection unit also includes a tooling module, which is arranged in the constant temperature box. The tooling module includes a clamping cylinder for clamping and fixing the product to be tested and a sealing cylinder for sealing the product to be tested. The clamping cylinder and the sealing cylinder are respectively connected to the cleaning module to obtain part of the compressed gas after cleaning by the cleaning module as a driving medium.

[0016] The vehicle detection system disclosed herein includes the temperature-controlled airtightness detection system in any of the above-mentioned embodiments.

[0017] The temperature-controlled airtightness detection system and vehicle detection system of the disclosed embodiments are characterized by the fact that the temperature-controlled airtightness detection system can not only regulate the temperature of the compressed gas at the gas source end to be consistent with the temperature of the product to be tested, but can also be delivered to the product to be tested in a laminar flow form to avoid large temperature fluctuations of the compressed gas during the inflation stage, so that the temperature of the compressed gas after entering the product to be tested tends to be consistent with the temperature of the product to be tested, completely eliminating the influence of temperature on the detection results, and achieving higher airtightness detection accuracy. When the vehicle detection system of the disclosed embodiments detects the seals on the vehicle, the airtightness detection accuracy of the seals on the vehicle is higher, which can greatly improve the airtightness detection accuracy of the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Schematic diagram of a temperature-controlled airtightness detection system according to an embodiment of the present invention.

[0019] Figure 2 Schematic diagram of the air path of the temperature-controlled airtightness detection system according to an embodiment of the present invention.

[0020] Figure 3 Schematic diagram of the structure of the temperature control module according to an embodiment of the present invention.

[0021] Figure 4 Schematic diagram of the structure of the flow channel component according to an embodiment of the present invention.

[0022] Figure 5 Schematic diagram of the structure of the gas flow channel according to an embodiment of the present invention.

[0023] Reference numerals:

[0024] 100. Temperature-controlled airtightness testing system; 200. Product to be tested; 1. Pre-processing unit; 101. Gas storage module; 102. Temperature control module; 1021. Flow channel; 1021. Gas flow channel; 1022. Temperature control device; 1023. First temperature sensor; 1024. Protrusion; 103. Rectifier module; 104. Gas supply module; 105. Pressure regulating module; 106. Cleaning module; 2. Airtightness testing unit; 201. Constant temperature chamber ;202, constant temperature module;203, detection module;2031, first pipeline;2032, second pipeline;2033, standard parts;2034, differential pressure sensor;2035, main pipe;2036, pressure gauge;204, tooling module;3, post-processing unit;301, control module;4, first air valve;5, second air valve;6, third air valve;7, fourth air valve;8, fifth air valve;9, sixth air valve;10, seventh air valve. DETAILED DESCRIPTION

[0025] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0026] like Figures 1 to 5 As shown, the temperature-controlled airtightness detection system 100 according to an embodiment of the present invention includes a pre-processing unit 1 and an airtightness detection unit 2. The pre-processing unit 1 includes a gas storage module 101, a temperature control module 102, and a rectifier module 103, which are connected in sequence. The gas storage module 101 is used to store compressed gas, the temperature control module 102 is used to adjust the temperature of the compressed gas output by the gas storage module 101, and the rectifier module 103 is used to rectify the temperature-regulated compressed gas output by the temperature control module 102 into laminar gas.

[0027] The airtightness detection unit 2 includes a constant temperature box 201, a constant temperature module 202 and a detection module 203. The constant temperature module 202 and the detection module 203 are both arranged in the constant temperature box 201. The constant temperature module 202 is used to maintain the temperature in the constant temperature box 201 constant. The detection module 203 is connected to the rectifier module 103 to receive the laminar gas output by the rectifier module 103. The detection module 203 is used to detect the airtightness of the product to be tested 200 placed in the constant temperature box 201.

[0028] When using the temperature-controlled airtightness testing system 100 according to the embodiment of the present invention, the product to be tested 200 is placed in a constant temperature box 201 to ensure that the internal and surface temperatures of the product to be tested 200 are consistent with the temperature inside the constant temperature box 201. The temperature control module 102 regulates the temperature of the compressed gas output by the gas storage module 101 and ensures that the temperature of the compressed gas is consistent with the temperature inside the constant temperature box 201.

[0029] It is understood that the compressed gas output by temperature control module 102 is turbulent. During the inflation phase, the turbulent gas has an excessively fast flow rate and its internal molecular motion is disordered and chaotic, forming a vortex structure. This not only increases the heat transfer area but also facilitates heat diffusion and mixing at the heat transfer interface, resulting in significant temperature fluctuations after the turbulent gas enters the product under test 200. However, after the turbulent gas output by temperature control module 102 is rectified into laminar flow by rectification module 103, the laminar gas molecules are more stable and the heat transfer area is smaller, thus preventing significant temperature fluctuations in the compressed gas during the inflation phase.

[0030] Therefore, the temperature-controlled airtightness detection system 100 of the embodiment of the present invention can not only regulate the temperature of the compressed gas at the gas source end to be consistent with the temperature of the product to be tested 200, but also can deliver it to the product to be tested 200 in a laminar flow form to avoid large temperature fluctuations of the compressed gas during the inflation stage, so that the temperature of the compressed gas after entering the product to be tested 200 tends to be consistent with the temperature of the product to be tested 200, completely eliminating the influence of temperature on the detection results, and making the airtightness detection accuracy higher.

[0031] Optionally, the constant temperature module 202 within the constant temperature box 201 is generally made of metal or ceramic materials and typically includes components such as a heater, a temperature sensor, a thermostat, and a protective device. The heater is responsible for maintaining a constant temperature within the constant temperature box 201, the temperature sensor is responsible for monitoring temperature changes within the box, the thermostat controls the operation of the heater based on feedback signals from the sensor to maintain a constant temperature within the constant temperature box 201, and the protective device is used to protect the constant temperature module 202 from damage during operation.

[0032] Optionally, the rectifying module 103 is generally composed of a series of obstacles or filters, the purpose of which is to change the flow state of the gas through these structures, so as to change the turbulent gas into laminar gas.

[0033] For example, here are a few common rectifier unit technologies:

[0034] Obstacles: A series of obstacles, such as spiral guide plates and partitions, are placed in the rectifier module 103. These obstacles can change the direction and speed of gas flow, thereby gradually reducing the turbulence of the gas and making it gradually approach a laminar flow state.

[0035] Filter: A filter is used in the rectifier module 103 to filter the gas and remove turbulence therein. The filter usually adopts a dense fiber or membrane structure, which can effectively separate particulate matter and turbulent eddies in the gas.

[0036] Turbulence inhibitors: A certain amount of turbulence inhibitors is added to the rectifier unit to reduce the turbulence of the gas through interaction with the gas. Common turbulence inhibitors include surfactants and polymers.

[0037] Guiding device: A guiding device is used in the rectifier unit to guide the direction of gas flow to maintain a laminar flow state. The guiding device can adopt a curved or diffuse structure to reduce turbulence by changing the gas flow path.

[0038] In summary, through the above different rectification technologies, turbulent gas can be gradually transformed into laminar gas, so that it can achieve a stable speed and direction distribution inside the rectification module 103, thereby achieving a rectification effect on the gas.

[0039] In some embodiments, the temperature-controlled air tightness detection system 100 of an embodiment of the present invention also includes a post-processing unit 3, the post-processing unit 3 includes a control module 301, the control module 301 is connected to the gas storage module 101 to obtain the temperature of the compressed gas stored in the gas storage module 101 as a first temperature, the control module 301 is connected to the constant temperature module 202 to obtain the temperature inside the constant temperature box 201 as a second temperature, the control module 301 is connected to the temperature control module 102 to control the temperature control module 102 to adjust the compressed gas of the first temperature to the second temperature and deliver it to the detection module 203.

[0040] For example, the gas storage module 101 includes a gas tank and a temperature sensor disposed within the gas tank. The temperature sensor within the gas tank is connected to the control module 301 so that the control module 301 can monitor the temperature of the compressed gas within the gas tank. The temperature sensor on the thermostat module 202 is also connected to the control module 301 so that the control module 301 can monitor the temperature within the thermostat 201.

[0041] The temperature-controlled air tightness detection system 100 of the embodiment of the present invention obtains the temperature of the compressed gas stored in the gas storage module 101 through the control module 301 and obtains the temperature of the product to be tested 200 by obtaining the temperature of the constant temperature module 202. The temperature adjustment difference is automatically calculated to control the temperature control module 102 to adjust the temperature of the compressed gas, so that the degree of automatic control is high and the adjustment is convenient.

[0042] In some embodiments, the pre-processing unit 1 also includes a gas supply module 104 and a pressure regulating module 105. The gas supply module 104 is connected to the gas storage module 101 through the pressure regulating module 105. The pressure regulating module 105 is used to at least regulate the pressure of the compressed gas output by the gas supply module 104 and then deliver it to the gas storage module 101.

[0043] The gas supply module 104 provides the gas required for the entire system. The gas supply type can be air, helium, nitrogen, hydrogen, etc. The gas provided by the gas supply module 104 has a certain pressure, which can be adjusted according to system requirements. Generally, the maximum pressure needs to meet the pressure required by the product under test 100. The pressure regulation module 105 adjusts the pressure of the compressed gas to 1.5 times the test pressure of the product under test 200. The pressure-regulated gas is then stored in the gas storage module 101. The volume of the gas storage module 101 must be large enough, at least 200 times the volume of gas used by the product under test 200.

[0044] In some embodiments, the pre-treatment unit 1 further includes a cleaning module 106, which is disposed between the gas supply module 104 and the pressure regulating module 105. The cleaning module 106 is configured to dry and remove impurities from the compressed gas output by the gas supply module 104 before delivering it to the pressure regulating module 105. After the compressed gas is generated by the gas supply module 104, it is delivered to the cleaning module 106 to filter out water molecules and tiny impurities in the compressed gas to obtain dry and clean gas, thereby preventing water molecules and tiny impurities from clogging the pipeline.

[0045] In some embodiments, the airtightness detection unit 2 also includes a tooling module 204, which is arranged in the constant temperature box 201. The tooling module 204 includes a clamping cylinder for clamping and fixing the product to be tested 200 and a sealing cylinder for sealing the product to be tested 200. The clamping cylinder and the sealing cylinder are respectively connected to the cleaning module 106 to obtain part of the compressed gas after cleaning by the cleaning module 106 as a driving medium.

[0046] Specifically, within the constant temperature chamber 201, the clamping cylinder and the sealing cylinder of the tooling module 204 work together. The clamping cylinder is used to clamp and secure the product 200 under test, ensuring that it does not move or tilt during the test process, thereby improving test accuracy. The sealing cylinder is used to block specific areas or openings of the product 200 under test to prevent gas leakage. By installing the tooling module 204, the inspection accuracy and efficiency of the product 200 under test can be improved.

[0047] Optionally, a temperature sensor connected to the control module 301 will be integrated on the sealing cylinder. After the sealing is completed, the temperature sensor on the sealing cylinder will extend into the cavity of the product to be tested 200 to monitor the temperature changes of the gas inside the product to be tested 200 during the test. If the temperature change exceeds the set limit, the measurement is judged to be invalid.

[0048] Optionally, a first gas valve 4 is provided between the pressure regulating module 105 and the gas storage module 101 to control the flow rate of compressed gas input into the gas storage module 101 by the pressure regulating module 105. When the pressure of the compressed gas in the gas storage module 101 is lower than a certain value, the first gas valve 4 is opened to replenish the compressed gas.

[0049] A second air valve 5 is provided between the air storage module 101 and the temperature control module 102 to control the flow of compressed gas delivered from the air storage module 101 to the temperature control module 102. A third air valve 6 is provided between the cleaning module 106 and the tooling module 204 to control the flow of compressed gas delivered from the cleaning module 106 to the tooling module 204.

[0050] In some embodiments, as Figure 3 and Figure 4 As shown, the temperature control module 102 includes a flow channel 1021, a temperature control device 1022, and a first temperature sensor 1023. The flow channel 1021 has a gas flow channel 10211, the inlet and outlet of which are connected to the gas storage module 101 and the rectifier module 103, respectively. The temperature control device 1022 is provided on the flow channel 1021 to heat or cool the compressed gas in the gas flow channel 10211. The detection end of the first temperature sensor 1023 is provided in the gas flow channel 10211 to detect the temperature of the compressed gas in the gas flow channel 10211. The temperature control device 1022 and the first temperature sensor 1023 are both connected to the control module 301.

[0051] Specifically, the temperature control device 1022 is a semiconductor temperature control device 1022 that can both heat and cool. Heat dissipation fins are provided on the back of the temperature control device 1022 to quickly dissipate heat.

[0052] The flow channel component 1021 comprises a plate body and a cover plate, which is mounted on the plate body to define a gas flow channel 10211 between the cover plate and the plate body. This makes the flow channel component 1021 simple in structure and easy to manufacture. Because the temperature control device 1022 and the first temperature sensor 1023 are both connected to the control module 301, the control module 301 can obtain the temperature of the compressed gas in the gas flow channel 10211 and can control the temperature control device 1022 in real time to heat or cool the compressed gas in the gas flow channel 10211, so that the temperature of the compressed gas adjusted by the temperature control module 1022 remains consistent with the temperature of the product 200 to be tested.

[0053] In some embodiments, there are multiple temperature control devices 1022, and the multiple temperature control devices 1022 are arranged at intervals in the extension direction of the gas flow channel 10211. There are multiple first temperature sensors 1023, and the multiple first temperature sensors 1023 are arranged at intervals in the extension direction of the gas flow channel 10211.

[0054] For example, the number of temperature control devices 1022 is five, the number of first temperature sensors 1023 is four, and the temperature control module 102 adopts multi-node multi-module control to accurately control the temperature of the compressed gas in the gas flow channel 10211. It can achieve precise adjustment of the temperature of the compressed gas in the gas flow channel 10211, so that the working reliability of the temperature control module 102 is higher.

[0055] In some embodiments, as Figure 5 As shown, the gas flow channel 10211 is arranged in a serpentine shape, and a plurality of protrusions 1024 are provided on the inner wall of the gas flow channel 10211 . The plurality of protrusions 1024 are arranged at intervals in the circumferential direction of the gas flow channel 10211 .

[0056] The temperature-controlled airtightness detection system 100 of the embodiment of the present invention can increase the path of the gas flow channel 10211 by configuring the gas flow channel 10211 into a serpentine shape, thereby increasing the residence time of the compressed gas in the gas flow channel 10211, which is beneficial to the temperature regulation accuracy of the compressed gas. In addition, the protrusions 1024 distributed on the inner wall of the gas flow channel 10211 can increase the heat conduction area, allowing the compressed gas temperature to change faster, improving the response speed of the compressed gas temperature, and achieving precise control of the compressed gas temperature within the effective length. In addition, the compressed gas in the gas flow channel 10211 is in a turbulent state, which can also accelerate the heat exchange rate to improve the temperature regulation efficiency of the compressed gas.

[0057] In some embodiments, the detection module 203 includes a first pipeline 2031, a second pipeline 2032, a standard component 2033, and a differential pressure sensor 2034. The inlet ends of the first pipeline 2031 and the second pipeline 2032 are both connected to the rectifier module 103. The outlet end of the first pipeline 2031 is connected to the standard component 2033 to deliver compressed gas into the standard component 2033. The outlet end of the second pipeline 2032 is used to connect to the product under test 200 to deliver compressed gas into the product under test 200. The differential pressure sensor 2034 is disposed between the first pipeline 2031 and the second pipeline 2032 to detect the pressure difference between the first pipeline 2031 and the second pipeline 2032.

[0058] like Figure 2 As shown, when the detection module 203 is working, the pressure of the compressed gas in the first pipeline 2031 and the second pipeline 2032 is the same, that is, the pressure between the standard part 2033 and the product to be tested 200 is constant, and there is a differential pressure sensor 2034 connecting the two. If a leak occurs at the end of the product to be tested 200, the pressure at the end of the product to be tested 200 will be lower than the pressure at the end of the standard part 2033. After the set test time, the reading of the differential pressure sensor 2034 is the leakage amount of the product, thereby simplifying the leakage detection.

[0059] In some embodiments, the detection module 203 further includes a main pipe 2035 and a pressure gauge 2036. The first pipe 2031 and the second pipe 2032 are both connected to the rectifier module 103 via the main pipe 2035. The pressure gauge 2036 is provided on the main pipe 2035. By observing the pressure of the compressed gas in the main pipe 2035 via the pressure gauge 2036, it is determined whether the compressed gas entering the standard component 2033 and the product under test 200 has reached the test pressure, thereby facilitating the determination.

[0060] Optionally, a fourth air valve 7 is provided on the first pipeline 2031 to control the on / off state of the first pipeline 2031, and a fifth air valve 8 is provided on the second pipeline 2032 to control the on / off state of the second pipeline 2032. Specifically, during operation, when the detection module 203 is operating, after the value on the pressure gauge 2036 reaches the set test pressure, the fourth air valve 7 and the fifth air valve 8 are closed, entering a pressure holding phase to measure the leakage of the product 200 under test.

[0061] Optionally, a sixth air valve 9 for exhausting gas is provided on the standard component 9 . When the test of a product 200 to be tested is completed, the compressed gas in the standard component is exhausted through the sixth air valve 9 .

[0062] Alternatively, as Figure 1 As shown, the detection module 203 has a built-in sensor, which is responsible for detecting the air tightness of the product and outputting the results to the control module 301.

[0063] Optionally, the post-processing unit 3 further includes a storage module 302 and a display module 303. After the control module 301 receives data from the first temperature sensor 1023 inside the temperature control module 102, it controls the temperature of the temperature control device 1022 in the temperature control module 102 through calculation. In addition, the control module 301 is also responsible for receiving the test results from the detection module 203, processing them into intuitive and visual results, outputting them to the storage module 302 for storage and backup, and allowing the tester to intuitively see the test results through the display module 303.

[0064] The vehicle inspection system of the present invention includes the temperature-controlled airtightness inspection system 100 of any of the aforementioned embodiments and is used to inspect vehicle seals. Because the temperature-controlled airtightness inspection system 100 of the embodiments of the present invention completely eliminates the effects of temperature on inspection results, it achieves higher accuracy in airtightness inspection of vehicle seals, significantly improving vehicle airtightness inspection accuracy.

[0065] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0066] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0067] In the present invention, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0068] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0069] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples without contradiction.

[0070] Although the above embodiments have been shown and described, it is understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. Changes, modifications, substitutions and variations of the above embodiments by those skilled in the art are all within the scope of protection of the present invention.

Claims

1. A temperature-controlled airtightness detection system, characterized in that: include: A pre-processing unit, the pre-processing unit comprising a gas storage module, a temperature control module and a rectifier module connected in sequence, the gas storage module being used to store compressed gas, the temperature control module being used to adjust the temperature of the compressed gas output by the gas storage module, and the rectifier module being used to rectify the temperature-regulated compressed gas output by the temperature control module into laminar gas; An airtightness detection unit includes a constant temperature box, a constant temperature module and a detection module. The constant temperature module and the detection module are both arranged in the constant temperature box. The constant temperature module is used to maintain the temperature in the constant temperature box constant. The detection module is connected to the rectifier module to receive the laminar gas output by the rectifier module. The detection module is used to detect the airtightness of the product to be tested placed in the constant temperature box.

2. The temperature control airtightness detection system according to claim 1, characterized in that: It also includes a post-processing unit, which includes a control module. The control module is connected to the gas storage module to obtain a first temperature for the compressed gas stored in the gas storage module. The control module is connected to the constant temperature module to obtain a second temperature in the constant temperature box. The control module is connected to the temperature control module to control the temperature control module to adjust the compressed gas at the first temperature to the second temperature and deliver it to the detection module.

3. The temperature control airtightness detection system according to claim 2, characterized in that: The temperature control module includes a flow channel component, a temperature control device and a first temperature sensor. The flow channel component has a gas flow channel. The inlet and outlet of the gas flow channel are respectively connected to the gas storage module and the rectifier module. The temperature control device is arranged on the flow channel component to heat or cool the compressed gas in the gas flow channel. The detection end of the first temperature sensor is arranged in the gas flow channel to detect the temperature of the compressed gas in the gas flow channel. The temperature control device and the first temperature sensor are both connected to the control module.

4. The temperature control airtightness detection system according to claim 3, characterized in that: There are multiple temperature control devices, which are arranged at intervals in the extension direction of the gas flow channel. There are multiple first temperature sensors, which are arranged at intervals in the extension direction of the gas flow channel.

5. The temperature control airtightness detection system according to claim 3, characterized in that: The gas flow channel is arranged in a serpentine shape, and a plurality of protrusions are provided on the inner wall of the gas flow channel. The plurality of protrusions are arranged at intervals in the circumferential direction of the gas flow channel.

6. The temperature control airtightness detection system according to claim 1, characterized in that: The detection module includes a first pipeline, a second pipeline, a standard component and a pressure differential sensor. The inlet ends of the first pipeline and the second pipeline are both connected to the rectifier module, the outlet end of the first pipeline is connected to the standard component to deliver compressed gas into the standard component, and the outlet end of the second pipeline is used to be connected to the product to be tested to deliver compressed gas into the product to be tested. The pressure differential sensor is arranged between the first pipeline and the second pipeline to detect the pressure difference between the first pipeline and the second pipeline.

7. The temperature control airtightness detection system according to claim 6, characterized in that: The detection module further includes a main pipe and a pressure gauge. The first pipeline and the second pipeline are both connected to the rectifier module through the main pipe. The pressure gauge is arranged on the main pipe.

8. The temperature control airtightness detection system according to any one of claims 1 to 7, characterized in that: The pre-processing unit further includes an air supply module and a pressure regulating module. The air supply module is connected to the air storage module via the pressure regulating module. The pressure regulating module is used to regulate the pressure of the compressed gas output by the air supply module and then deliver it to the air storage module.

9. The temperature control airtightness detection system according to claim 8, characterized in that: The pre-processing unit further includes a cleaning module, which is arranged between the air supply module and the pressure regulating module. The cleaning module is used to at least dry and remove impurities from the compressed gas output by the air supply module and then deliver it to the pressure regulating module.

10. The temperature control and airtightness detection system according to claim 9, characterized in that: The airtightness detection unit also includes a tooling module, which is arranged in the constant temperature box. The tooling module includes a clamping cylinder for clamping and fixing the product to be tested and a sealing cylinder for sealing the product to be tested. The clamping cylinder and the sealing cylinder are respectively connected to the cleaning module to obtain part of the compressed gas after cleaning by the cleaning module as a driving medium.

11. A vehicle detection system, characterized in that: A temperature-controlled airtightness detection system comprising any one of claims 1-10.

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