Air conditioner exhaust pipe sealing detection device and method thereof

Abstract

The application discloses an air conditioner exhaust pipe sealing detection device and method, and relates to the technical field of sealing detection.The device comprises a mounting plate, one side of the mounting plate is fixed with a cylinder one, the driving end of the cylinder one is connected with a lifting frame, the surface of the lifting frame is fixed with a driving box, the upper side of the driving box is connected with a gas cylinder, the lower end of the gas cylinder is rotationally provided with a movable tooth, the surface of the movable tooth is provided with a window, the bottom of the movable tooth is fixed with a valve block in cooperation with the driving box, four valve ports are arranged on the circumference of the valve block, corresponding communication channels are arranged on the driving box in cooperation with the valve ports, a slide is arranged on the lower side of the driving box, two communication channels are connected with the two ends of the slide, a sliding block is slidably arranged in the slide, the lower end of the sliding block is connected with a sealing plate, a test light source is arranged on the lower side of the sealing plate, and a light receiving belt is arranged on the lower side of the lifting frame.The application prolongs the service life and detection stability of the device.

Description

Technical Field

[0001] This invention relates to the field of sealing detection technology, specifically to a sealing detection device and method for air conditioning exhaust pipes. Background Technology

[0002] In building electromechanical installation engineering, air conditioning exhaust duct systems, as crucial facilities for indoor and outdoor air exchange, waste heat and exhaust gas discharge, and indoor air quality control, are widely used in various building scenarios such as residential buildings, commercial complexes, industrial plants, hospitals, and cleanrooms. Their sealing performance directly affects the safety, energy efficiency, and operational stability of the air conditioning system, and is key to ensuring building functionality and improving the quality of living and working environments. With the construction industry's continuous development towards energy conservation, intelligence, and precision, and the increasing national requirements for building energy consumption control, fire safety, and indoor environmental quality, air conditioning exhaust duct sealing testing has become an indispensable and critical process in project construction acceptance and subsequent operation and maintenance management. The demand for standardized testing techniques and accurate results is becoming increasingly urgent.

[0003] Currently, the sealing performance of exhaust ducts is mostly tested using the light leakage detection method: in a dark environment, a light source is placed inside the duct and slowly moved along the seams, flanges, and seams that are prone to leakage. By observing whether light escapes from the outer wall of the duct, it can be determined whether there are gaps or potential air leakage in the duct.

[0004] However, in actual testing, duct sealing test results are easily affected by various environmental and operating conditions, which existing testing methods often fail to adequately consider. On one hand, dust, condensation, and other impurities easily accumulate on the inner walls and joints of the duct. These impurities can block the path of light, preventing light from passing through existing gaps and thus concealing actual leaks, leading to misjudgments by testing personnel as successful sealing. On the other hand, changes in ambient temperature cause thermal expansion and contraction of the duct material, resulting in dynamic changes in gap dimensions. This directly affects the intuitive judgment of light leakage detection and deviates from actual air leakage under operating conditions. All of these factors reduce the reliability and accuracy of the test results, making it difficult to accurately reflect the actual sealing condition of the duct. Summary of the Invention

[0005] The purpose of this invention is to provide an air conditioning exhaust pipe sealing detection device and method to solve the problems mentioned in the background art.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution: an air conditioning exhaust pipe sealing detection device and method, comprising a test platform, a fixing mechanism installed on the test platform for limiting the exhaust pipe, a test mechanism mounted on one side of the fixing mechanism, the test mechanism including a mounting plate, a cylinder one fixed on one side of the mounting plate, a lifting frame connected to the driving end of the cylinder one, a drive box fixed on the surface of the lifting frame, an air cylinder connected to the upper side of the drive box, the air cylinder being a hollow structure with an open bottom, a movable tooth rotatably provided at the lower end of the air cylinder, a window opened on the surface of the movable tooth, a valve block fixed at the bottom of the drive box in cooperation with the movable tooth, four valve ports opened around the circumference of the valve block, a corresponding connecting channel opened in the drive box in cooperation with each valve port, a slide rail opened on the lower side of the drive box, two of which are connected to the two ends of the slide rail, a slider slidably provided inside the slide rail, a sealing plate connected to the lower end of the slider, a test light source installed on the lower side of the sealing plate, and a light receiving strip provided on the lower side of the lifting frame in cooperation with the test light source.

[0007] According to the above technical solution, a driver is installed on one side of the drive box. The drive end of the driver is fitted with a drive tooth. A notch is opened on the lower side of the air cylinder corresponding to the movable tooth. The drive tooth cooperates with the movable tooth through the notch.

[0008] According to the above technical solution, a collar is sleeved on the front end of the test light source, and several protective cottons are provided on the front end of the collar. The protective cottons are wedge-shaped sealing structures for the front end of the test light source. The protective cottons have an inclination inside. A sleeve is sleeved on the outside of the collar. A connecting rod is connected between the sleeve and the drive box. The sleeve and the collar are rotatably engaged.

[0009] According to the above technical solution, an annular groove is provided inside the front end of the test light source, and a ring of output holes is provided around the front circumference of the annular groove. A set of input holes is provided at the rear end of the annular groove, and the input holes are connected to the other two connecting channels.

[0010] According to the above technical solution, the test light source has a spiral groove on the surface of the annular groove, and a cam is provided at the bottom of the collar to cooperate with the spiral groove. The end of the cam is embedded in the spiral groove and slides with it.

[0011] According to the above technical solution, a pretreatment box, a temperature control box, and an air pump are provided on the other side of the mounting plate. The pretreatment box contains a filter module and a dehumidification module in sequence. The input end of the filter module is connected to the outside, and the output end of the filter module is connected to the input end of the dehumidification module. The temperature control box includes a cooling module and a heating module. The output end of the dehumidification module is connected to a three-way valve. The two output ends of the three-way valve are respectively connected to the input ends of the cooling module and the heating module. The output ends of the cooling module and the heating module are connected to the input end of the air pump, and the output end of the air pump is connected to the air cylinder.

[0012] According to the above technical solution, the testing mechanism also includes an x-axis moving module and a y-axis moving module. The y-axis moving module is set at the drive end of the x-axis moving module, and the mounting plate is fixed at the drive end of the y-axis moving module.

[0013] According to the above technical solution, the fixing mechanism includes a second driver, which is installed on the lower side of the test bench. The driving end of the second driver is fixed with a rotating platform. Four long slots are opened around the circumference of the rotating platform, and limit components are installed in the long slots.

[0014] According to the above technical solution, the limiting component includes cylinder two, which is fixed on the lower side of the rotating platform. The driving end of cylinder two is connected to a limiting block, which slides with the long groove. An intermediate body is connected to the upper side of the limiting block, and hinge seats are fixed on both sides of the intermediate body. A rotating shaft is rotatably connected inside the hinge seat. A spring one is connected between the hinge seat and the rotating shaft. An intermediate plate is connected to one side of the rotating shaft, and several spring twos are connected to both sides of the intermediate plate. A side plate is connected to the other end of the spring twos.

[0015] According to the above technical solution, force sensors are installed at the connection end between spring one and the hinge seat, and at the connection end between the intermediate plate and spring two, to monitor the clamping force and the limit status of the exhaust pipe in real time, so as to avoid excessive clamping force causing deformation of the exhaust pipe or insufficient clamping force causing unstable positioning, thereby further improving the stability and safety of the detection process.

[0016] According to the above technical solution, a switchable cover is installed on the outside of the test bench to create a dark environment.

[0017] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: The present invention uses a wedge-shaped sealing structure for the protective cotton at the front end of the test light source, which has both cleaning and protection functions: the external part can clean the inner wall of the exhaust pipe and remove dust and impurities to avoid impurities affecting the accuracy of light leakage detection; the internal part can protect and clean the test light source to prevent stains from adhering to the surface of the light source and ensure the stability of the light source output.

[0018] By incorporating protective cotton, a temperature-controlled airflow delivered by an air cylinder can be used for drying and unclogging. This ensures both the cleaning effectiveness and breathability of the protective cotton, extending its service life, and preventing testing interference caused by dampness or clogging. Furthermore, the airflow temperature can be adjusted to meet cleaning needs in different environments, further ensuring testing stability. The rotation of the collar and sleeve, combined with the extension and retraction of the test light source, drives the protective cotton to rotate, increasing the frictional cleaning force against the inner wall of the exhaust pipe and improving the cleaning effect. No additional manual cleaning of the workpiece or equipment is required, further enhancing operational convenience.

[0019] By combining the pretreatment chamber and the temperature control chamber, the input airflow can be filtered, dehumidified, and temperature-controlled. This not only prevents impurities and moisture from affecting the normal operation of the detection components, but also eliminates the interference of ambient temperature and humidity on the detection results by adjusting the airflow temperature. This adapts to the detection needs under different working conditions and further improves the stability of detection accuracy. Attached Figure Description

[0020] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the overall structure of the sealing detection device of the present invention; Figure 2 This is a schematic diagram of the testing mechanism of the present invention; Figure 3 This is a partial structural schematic diagram of the testing mechanism of the present invention; Figure 4 This is a schematic diagram of the connection structure of the air cylinder of the present invention; Figure 5 This is a partial cross-sectional view of the drive box of the present invention; Figure 6 This is a cross-sectional view of the air cylinder of the present invention; Figure 7 This is a cross-sectional view of the drive box of the present invention; Figure 8 This is a schematic diagram of the structure of the test light source of this invention; Figure 9 This is a partial cross-sectional view of the test light source of this invention; Figure 10 This is a schematic diagram of the fixing mechanism of the present invention; Figure 11 This is the present invention. Figure 10 Enlarged diagram of area A.

[0021] In the diagram: 1. Test bench; 11. Switchable cover; 2. Fixing mechanism; 21. Driver II; 22. Rotating platform; 221. Long slot; 3. Exhaust pipe; 4. Test mechanism; 41. X-axis moving module; 42. Y-axis moving module; 5. Mounting plate; 51. Cylinder I; 52. Lifting frame; 521. Optical receiving belt; 53. Drive box; 531. Valve block; 532. Valve port; 533. Connecting channel; 534. Slide rail; 5341. Slide groove; 535. Slider; 5351. Locking block; 5352. Sealing plate; 536. Driver I; 537. Drive gear; 54. Air... 541. Cylinder; 542. Movable gear; 55. Window; 56. Pretreatment box; 57. Filter module; 58. Dehumidification module; 59. Temperature control box; 50. Cooling module; 51. Heating module; 52. Air pump; 60. Test light source; 61. Collar; 62. Protective cotton; 63. Sleeve; 64. Connecting rod; 65. Annular groove; 651. Output hole; 652. Input hole; 653. Spiral groove; 71. Cylinder II; 72. Limiting block; 73. Intermediate body; 731. Hinge seat; 74. Rotating shaft; 741. Intermediate plate; 75. Spring I; 76. Spring II; 77. Side plate. Detailed Implementation

[0022] 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.

[0023] Please see Figures 1-11 This invention provides a technical solution: an air conditioner exhaust pipe sealing test device and method, comprising a test bench 1, a fixing mechanism 2 installed on the test bench 1, the fixing mechanism 2 being used to limit the exhaust pipe 3, a test mechanism 4 mounted on one side of the fixing mechanism 2, the test mechanism 4 including a mounting plate 5, a cylinder 51 fixed on one side of the mounting plate 5, a lifting frame 52 connected to the driving end of the cylinder 51, a drive box 53 fixed to the surface of the lifting frame 52, an air cylinder 54 connected to the upper side of the drive box 53, the air cylinder 54 being a hollow structure with an open lower end, and a movable tooth 541 rotatably provided at the lower end of the air cylinder 54. 41 has a window 542 on its surface. The bottom of the drive box 53 is fixed with a valve block 531 in conjunction with the movable tooth 541. The valve block 531 has four valve ports 532 on its circumference. The drive box 53 has a corresponding connecting channel 533 in conjunction with each valve port 532. The lower side of the drive box 53 has a slide rail 534. Two of the connecting channels 533 are connected to the two ends of the slide rail 534. A slider 535 is slidably arranged inside the slide rail 534. The lower end of the slider 535 is connected to a sealing plate 5352. A test light source 6 is installed on the lower side of the sealing plate 5352. A light receiving strip 521 is set on the lower side of the lifting frame 52 in conjunction with the test light source 6.

[0024] Furthermore, such as Figure 4 , Figure 5 As shown, a driver 536 is installed on one side of the drive box 53. The drive end of the driver 536 is fitted with a drive tooth 537. A notch is opened on the lower side of the air cylinder 54 corresponding to the movable tooth 541. The drive tooth 537 cooperates with the movable tooth 541 through the notch.

[0025] In actual operation, the actuator 536 controls the rotation of the movable gear 541 via the drive gear 537, thereby adjusting the correspondence between the window 542 and each valve port 532. The air cylinder 54 is used to input or output external airflow. When the movable gear 541 rotates to connect with the slide rail 534, the position of the slider 535 within the slide rail 534 can be adjusted by inputting or extracting airflow to one side of the slide rail 534, thereby adjusting the distance between the test light source 6 and the wall of the exhaust pipe 3. During light leakage testing, the test light source 6 needs to be placed close to the inner wall surface of the exhaust pipe 3, while the light receiving strip 521 is used to receive the light source from the outer wall side of the exhaust pipe 3 to determine if there is a sealing problem. It should be noted that a groove 5341 is provided inside the slide rail 534, and a locking block 5351 is provided for the slider 535 in conjunction with the groove 5341 to help the slider 535 move stably within the slide rail 534. The sealing plate 5352 is used to close the lower opening of the drive box 53. Preferably, the sealing plate 5352 is made of wear-resistant and low-friction sealing material with high planar precision. Relying on the air pressure inside the slide 534, the air pressure will press the slider 535 together with the sealing plate 5352 tightly against the bottom surface of the drive box 53. The greater the air pressure, the stronger the sealing plate adhesion, thus achieving pressure self-tightening sealing. Wear-resistant sealing gaskets can be embedded on the upper surface of the sealing plate 5352. The gaskets fill the tiny gaps in the sliding, maintaining the seal while sliding, allowing sliding while preventing the gas inside the slide 534 from leaking downwards.

[0026] like Figure 4 As shown, a collar 61 is fitted at the front end of the test light source 6, and several protective cotton 62s are provided at the front end of the collar 61. The protective cotton 62s are wedge-shaped sealing structures at the front end of the test light source 6. The protective cotton 62s are inclined inside. A sleeve 63 is fitted outside the collar 61. A connecting rod 64 is connected between the sleeve 63 and the drive box 53. The sleeve 63 and the collar 61 are rotatably engaged.

[0027] like Figure 8 , Figure 9 As shown, the front end of the test light source 6 has an annular groove 65, and a ring of output holes 651 is formed around the front circumference of the annular groove 65. The rear end of the annular groove 65 has a set of input holes 652, which are connected to the other two connecting channels 533.

[0028] Furthermore, the test light source 6 has a spiral groove 653 on the surface of the annular groove 65, and a cam is provided at the bottom end of the collar 61 in conjunction with the spiral groove 653. The end of the cam is embedded in the spiral groove 653 and slides in conjunction with it.

[0029] The following is a supplementary explanation based on the above structure: In the initial state, the front end of the test light source 6 is wrapped inside the protective cotton 62, and the collar 61 is located at the output hole 651, which is closed. During testing, the test light source 6 extends out from inside the protective cotton 62. Simultaneously, the relative movement between the test light source 6 and the protective cotton 62 causes the cam at the bottom of the collar 61 to move along the spiral groove 653, thereby driving the collar 61 and the protective cotton 62 to rotate relative to the test light source 6, increasing the frictional cleaning force between the protective cotton 62 and the inner wall of the exhaust pipe 3. The outside of the protective cotton 62 is used to clean the test wall of the exhaust pipe 3, and the inside of the protective cotton 62 is used to protect and clean the test light source 6. When the test light source 6 extends out of the protective cotton 62, the collar 61 disengages from the surface of the output hole 651, at which point the output hole 651 corresponds to the protective cotton 62. When the movable tooth 541 rotates to the state of communicating with the annular groove 65, the air cylinder 54 can be used to dry the protective cotton 62 and clear its internal gaps by inputting an airflow of a certain temperature. It ensures the cleanliness and breathability of the protective cotton 62, and can also adapt to the testing needs under different environmental conditions by adjusting the airflow temperature, thus eliminating the influence of environmental temperature and humidity on the test results.

[0030] In one embodiment, such as Figure 3 As shown, on the other side of the mounting plate 5, there is a pretreatment box 55, a temperature control box 56, and an air pump 57. The pretreatment box 55 contains a filter module 551 and a dehumidification module 552 arranged in sequence. The input end of the filter module 551 is connected to the outside, and the output end of the filter module 551 is connected to the input end of the dehumidification module 552. The temperature control box 56 includes a cooling module 561 and a heating module 562. The output end of the dehumidification module 552 is connected to a three-way valve. The two output ends of the three-way valve are respectively connected to the input ends of the cooling module 561 and the heating module 562. The output ends of the cooling module 561 and the heating module 562 are connected to the input end of the air pump 57. The output end of the air pump 57 is connected to the air cylinder 54.

[0031] In actual operation, the external airflow is filtered by the filter module 551 and dehumidified by the dehumidification module 552 in the pretreatment box 55, and then enters the temperature control box 56. Depending on the testing requirements, it is selected to be cooled by the cooling module 561 or heated by the heating module 562 to obtain the required temperature airflow. After being pressurized by the air pump 57, it is delivered to the air cylinder 54 to provide a stable air source for the air path drive, cleaning and drying functions of the testing mechanism 4, realize the automation and intelligent control of the testing process, and improve the accuracy and reliability of light leakage detection.

[0032] like Figure 2 As shown, the testing mechanism 4 also includes an x-axis moving module 41 and a y-axis moving module 42. The y-axis moving module 42 is located at the drive end of the x-axis moving module 41, and the mounting plate 5 is fixed at the drive end of the y-axis moving module 42.

[0033] like Figure 10As shown, the fixing mechanism 2 includes a second driver 21, which is installed on the lower side of the test bench 1. A rotating platform 22 is fixed to the driving end of the second driver 21. Four long slots 221 are opened on the circumference of the rotating platform 22, and limit components are provided in the long slots 221.

[0034] In one embodiment, such as Figure 11 As shown, the limiting assembly includes a second cylinder 71, which is fixed to the lower side of the rotating platform 22. The driving end of the second cylinder 71 is connected to a limiting block 72, which slides in conjunction with the long groove 221. An intermediate body 73 is connected to the upper side of the limiting block 72. Hinges 731 are fixed to both sides of the intermediate body 73. A rotating shaft 74 is rotatably connected inside the hinge 731. A spring 75 is connected between the hinge 731 and the rotating shaft 74. An intermediate plate 741 is connected to one side of the rotating shaft 74. Several springs 76 are connected to both sides of the intermediate plate 741. The other end of the springs 76 is connected to a side plate 77.

[0035] In actual operation, cylinder 2 71 controls the intermediate body 73 to move within the range of the long slot 221 through the limiting block 72. Depending on the specifications of the exhaust pipe 3, it is determined whether external or internal limiting is required. Cylinder 2 71 drives the intermediate body 73 to move closer to the surface of the exhaust pipe 3, and the side plate 77 is used to limit the walls on both sides of the intermediate body 73.

[0036] Optionally, force sensors are provided at the connection ends of spring 1 75 and hinge seat 731, and at the connection ends of intermediate plate 741 and spring 2 76, to monitor the clamping force and the limiting status of exhaust pipe 3 in real time, so as to avoid excessive clamping force causing deformation of exhaust pipe 3 or insufficient clamping force causing unstable positioning, thereby further improving the stability and safety of the detection process.

[0037] like Figure 1 As shown, a switchable cover 11 is provided on the outside of the test bench 1 to create a dark environment.

[0038] The specific testing methods are as follows: Step 1: Equipment Inspection and Debugging. Turn on the main power supply of the device and check the operating status of components such as the x-axis moving module 41, y-axis moving module 42, cylinder 1 51, cylinder 2 71, driver 1 536, driver 2 21, air pump 57, pretreatment box 55, and temperature control box 56. Confirm that there are no abnormalities such as jamming, abnormal noise, or air leakage. Debug the matching accuracy between the movable gear 541 and the valve block 531 to ensure that the window 542 can be accurately aligned with each valve port 532. Check the brightness of the test light source 6 and the sensitivity of the light receiving band 521 to ensure that they are working properly. Check the cleanliness and integrity of the protective cotton 62. If there are stains or damage, replace it in time.

[0039] Step 2: Air source and environment preparation. Turn on the pretreatment chamber 55, temperature control chamber 56 and air pump 57. According to the test environment conditions, set the temperature parameters of the temperature control chamber 56 (if the ambient temperature and humidity are suitable, the default room temperature mode can be used). After the airflow passes through the filter module 551 for filtration, the dehumidification module 552 for dehumidification and the temperature control module (cooling module 561, heating module 562) for temperature control, a stable air source is formed and delivered to the air cylinder 54 for standby. Close the switch-type cover 11 to create a closed dark environment and eliminate the interference of external light on the test results.

[0040] Step 3: Clamping and positioning of exhaust pipe 3. Place the exhaust pipe 3 to be tested on the rotating platform 22 of the test bench 1. Determine the limiting method (external limiting or internal limiting) according to the specifications of the exhaust pipe 3 and the testing requirements. Start the second driver 21 to drive the rotating platform 22 to rotate to a suitable angle so that the long groove 221 is aligned with the limiting position. Start the second cylinder 71 to drive the limiting block 72 to move the intermediate body 73 along the long groove 221 until the side plate 77 is close to the wall of the exhaust pipe 3. Flexible clamping is achieved by the elastic action of the second spring 76. If the device is equipped with a force sensor, observe the clamping force data in real time and adjust the driving stroke of the second cylinder 71 to ensure that the clamping force is moderate and to avoid deformation or unstable positioning of the exhaust pipe 3.

[0041] Step 4: Test position adjustment. Start the x-axis moving module 41 and y-axis moving module 42 to move the mounting plate 5. In conjunction with cylinder 51, drive the lifting frame 52 to rise and fall, and adjust the horizontal position and height of the test light source 6 so that the test light source 6 is aligned with the starting detection part of the exhaust pipe 3. Control the drive gear 537 to rotate through the driver 536, which drives the movable gear 541 to rotate, so that the window 542 is aligned with the valve port 532 connected to the slide rail 534. Then, the air pump 57 delivers airflow to one side of the slide rail 534, pushing the slider 535 to move along the slide rail 534, so that the test light source 6 is close to the inner wall of the exhaust pipe 3, and at the same time, the light receiving strip 521 is aligned with the corresponding position on the outer wall of the exhaust pipe 3.

[0042] Step 5: Cleaning and Light Source Activation. After the test light source 6 is close to the inner wall of the exhaust pipe 3, the drive mechanism is activated to slowly extend the test light source 6 out of the protective cotton 62. At this time, the cam at the bottom of the collar 61 slides along the spiral groove 653, causing the collar 61 and the protective cotton 62 to rotate, cleaning the inner wall detection surface of the exhaust pipe 3. At the same time, the collar 61 disengages from the surface of the output hole 651, the test light source 6 is activated, and the light is evenly projected onto the inner wall of the exhaust pipe 3 through the output hole 651 of the annular groove 65.

[0043] Step Six: Comprehensive Light Leakage Detection. Start the rotating platform 22, causing the exhaust duct 3 to rotate slowly. Simultaneously, through the x-axis moving module 41, y-axis moving module 42, and lifting frame 52, the test light source 6 moves axially and radially along the exhaust duct 3, achieving full surface coverage detection of the inner wall of the exhaust duct 3. The light receiving belt 521 receives light from the outer wall of the exhaust duct 3 in real time. If there are sealing gaps in the exhaust duct 3, light will leak through the gaps, be captured by the light receiving belt 521, and a signal will be fed back. During the detection process, the valve port 532 can be switched via the movable tooth 541 as needed to deliver temperature-controlled airflow to the annular groove 65, drying the protective cotton 62 and clearing internal gaps to ensure detection stability.

[0044] Step 7: Test End and Reset.

[0045] Pass / Fail Judgment: If the light receiving band 521 does not capture any light leakage signal during the test, or the intensity of the captured light leakage signal is lower than the preset threshold (which can be adjusted according to the usage requirements of the exhaust pipe 3), and the exhaust pipe 3 is not deformed or damaged on the surface, the exhaust pipe 3 is judged to have qualified sealing performance and meets the usage standards.

[0046] Failure determination: During the test, if the light receiving band 521 continuously captures obvious light leakage signals and the intensity of the light leakage signals exceeds the preset threshold, it indicates that the exhaust pipe 3 has a sealing defect (such as gaps, damage, etc.); or the exhaust pipe 3 is deformed or has surface damage (caused by improper clamping force), both of which are determined to be unqualified.

[0047] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0048] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An air conditioning exhaust pipe sealing test device, comprising a test bench (1), characterized in that, A fixing mechanism (2) is installed on the test bench (1). The fixing mechanism (2) is used to limit the exhaust pipe (3). A test mechanism (4) is mounted on one side of the fixing mechanism (2). The test mechanism (4) includes a mounting plate (5). A cylinder (51) is fixed on one side of the mounting plate (5). A lifting frame (52) is connected to the driving end of the cylinder (51). A drive box (53) is fixed on the surface of the lifting frame (52). An air cylinder (54) is connected to the upper side of the drive box (53). The air cylinder (54) is a hollow structure with an open bottom. A movable tooth (541) is rotatably provided at the lower end of the air cylinder (54). A window (542) is opened on the surface of the movable tooth (541). The drive box (541) is a hollow structure with an open bottom. 3) A valve block (531) is fixed at the bottom of the movable tooth (541). The valve block (531) has four valve ports (532) around its circumference. The drive box (53) has corresponding connecting channels (533) for each valve port (532). A slide rail (534) is provided on the lower side of the drive box (53). Two of the connecting channels (533) are connected to the two ends of the slide rail (534). A slider (535) is slidably arranged inside the slide rail (534). A sealing plate (5352) is connected to the lower end of the slider (535). A test light source (6) is installed on the lower side of the sealing plate (5352). A light receiving strip (521) is provided on the lower side of the lifting frame (52) in conjunction with the test light source (6).

2. The air conditioning exhaust pipe sealing detection device according to claim 1, characterized in that, A driver (536) is installed on one side of the drive box (53). The drive end of the driver (536) is fitted with a drive tooth (537). A notch is opened on the lower side of the air cylinder (54) corresponding to the movable tooth (541). The drive tooth (537) cooperates with the movable tooth (541) through the notch.

3. The air conditioning exhaust pipe sealing detection device according to claim 2, characterized in that, The front end of the test light source (6) is fitted with a collar (61), and the front end of the collar (61) is provided with a plurality of protective cotton (62). The protective cotton (62) is a wedge-shaped sealing fit structure of the front end of the test light source (6). The protective cotton (62) is provided with an inclination inside. The collar (61) is fitted with a sleeve (63). The sleeve (63) is connected to the drive box (53) by a connecting rod (64). The sleeve (63) and the collar (61) are rotatably fitted.

4. The air conditioning exhaust pipe sealing detection device according to claim 3, characterized in that, The test light source (6) has an annular groove (65) inside its front end. The annular groove (65) has an output hole (651) around its front circumference. The annular groove (65) has an input hole (652) at its rear end. The input hole (652) is connected to the other two connecting channels (533).

5. The air conditioning exhaust pipe sealing detection device according to claim 4, characterized in that, The test light source (6) has a spiral groove (653) on the surface of the annular groove (65). The bottom end of the collar (61) is provided with a cam that matches the spiral groove (653). The end of the cam is embedded in the spiral groove (653) and slides with it.

6. The air conditioning exhaust pipe sealing detection device according to claim 5, characterized in that, On the other side of the mounting plate (5), there is a pretreatment box (55), a temperature control box (56), and an air pump (57). The pretreatment box (55) contains a filter module (551) and a dehumidification module (552) in sequence. The input end of the filter module (551) is connected to the outside, and the output end of the filter module (551) is connected to the input end of the dehumidification module (552). The temperature control box (56) includes a cooling module (561) and a heating module (562). The output end of the dehumidification module (552) is connected to a three-way valve. The two output ends of the three-way valve are respectively connected to the input ends of the cooling module (561) and the heating module (562). The output ends of the cooling module (561) and the heating module (562) are connected to the input end of the air pump (57), and the output end of the air pump (57) is connected to the air cylinder (54).

7. The air conditioning exhaust pipe sealing detection device according to claim 6, characterized in that, The testing mechanism (4) further includes an x-axis moving module (41) and a y-axis moving module (42). The y-axis moving module (42) is disposed at the driving end of the x-axis moving module (41), and the mounting plate (5) is fixed at the driving end of the y-axis moving module (42).

8. The air conditioning exhaust pipe sealing detection device according to claim 1, characterized in that, The fixing mechanism (2) includes a second driver (21), which is installed on the lower side of the test bench (1). The driving end of the second driver (21) is fixed with a rotating platform (22). The rotating platform (22) has four long slots (221) on its circumference, and a limit component is provided in the long slots (221).

9. The air conditioning exhaust pipe sealing detection device according to claim 8, characterized in that, The limiting assembly includes a second cylinder (71), which is fixed to the lower side of the rotating platform (22). The driving end of the second cylinder (71) is connected to a limiting block (72). The limiting block (72) is slidably engaged with the long groove (221). An intermediate body (73) is connected to the upper side of the limiting block (72). A hinge seat (731) is fixed to both sides of the intermediate body (73). A rotating shaft (74) is rotatably connected inside the hinge seat (731). A spring (75) is connected between the hinge seat (731) and the rotating shaft (74). An intermediate plate (741) is connected to one side of the rotating shaft (74). Several springs (76) are connected to both sides of the intermediate plate (741). A side plate (77) is connected to the other end of the springs (76).

10. A testing method for an air conditioning exhaust duct sealing testing device, applicable to the air conditioning exhaust duct sealing testing device as described in claim 9, characterized in that, The specific method is as follows: Step 1: Equipment inspection and debugging; Step Two: Gas Source and Environmental Preparation; Step 3: Clamping and positioning of exhaust pipe (3): Place the exhaust pipe (3) to be tested on the rotating platform (22) of the test bench (1). Determine the limiting method according to the specifications of the exhaust pipe (3) and the testing requirements. Step 4: Test position adjustment. Start the x-axis moving module (41) and y-axis moving module (42) to move the mounting plate (5). In conjunction with cylinder 1 (51), drive the lifting frame (52) to rise and fall. Adjust the horizontal position and height of the test light source (6) so that the test light source (6) is aligned with the starting detection part of the exhaust pipe (3). Control the drive gear (537) to rotate through the driver 1 (536), drive the movable gear (541) to rotate, so that the window (542) is aligned with the valve port (532) connected to the slide (534). Then, deliver airflow to one side of the slide (534) through the air pump (57), push the slider (535) to move along the slide (534), and drive the test light source (6) to be close to the inner wall of the exhaust pipe (3). At the same time, the light receiving strip (521) is aligned with the corresponding position on the outer wall of the exhaust pipe (3). Step 5: Cleaning and Light Source Activation. After the test light source (6) is close to the inner wall of the exhaust pipe (3), the drive mechanism is activated to slowly extend the test light source (6) out of the protective cotton (62). At this time, the cam at the bottom of the collar (61) slides along the spiral groove (653), driving the collar (61) and the protective cotton (62) to rotate, cleaning the inner wall detection surface of the exhaust pipe (3); at the same time, the collar (61) is removed from the surface of the output hole (651), the test light source (6) is activated, and the light is evenly projected onto the inner wall of the exhaust pipe (3) through the output hole (651) of the annular groove (65); Step 6: Full light leakage detection. Start the rotating platform (22) to drive the exhaust pipe (3) to rotate slowly. At the same time, through the x-axis moving module (41), y-axis moving module (42) and lifting frame (52), drive the test light source (6) to move along the axial and radial directions of the exhaust pipe (3) to achieve full surface coverage detection of the inner wall of the exhaust pipe (3). The light receiving belt (521) receives the light from the outer wall of the exhaust pipe (3) in real time. If there is a sealing gap in the exhaust pipe (3), the light will pass through the gap and be captured by the light receiving belt (521) and fed back the signal. During the detection process, the valve port (532) can be switched through the movable tooth (541) as needed to deliver temperature-controlled airflow to the annular groove (65), dry the protective cotton (62), clear the internal gaps, and ensure the stability of the detection. Step 7: Test End and Reset.

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