A high-precision air tightness detector and a detection method thereof

Abstract

The application discloses a high-precision air tightness detector and a detection method thereof. On one hand, the high-precision air tightness detector comprises a detection clamp for placing a product to be detected; an air pressure regulator for connecting the product to be detected in the detection clamp to automatically control the internal pressure of the product is arranged outside the detection clamp; the air pressure regulator comprises a box structure, a vacuum generator is arranged in the box structure, and the vacuum generator is connected with the product to be detected through an air path control valve island structure arranged on the box structure to automatically implement air tightness detection and further safely determine the air tightness of the product to be detected. On the other hand, the application further provides a detection method using the high-precision air tightness detector. The application has the advantages that the air tightness of the predetermined electronic product can be accurately determined to ensure the quality of the electronic product, and the quality of the electronic product is not easily harmed in the detection process.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of air tightness detection, in particular to a high-precision air tightness detector and a detection method thereof. BACKGROUND

[0002] With the development of science and technology and the progress of manufacturing process, the quality and function of electronic products are increasingly concerned by consumers; among them, whether the air tightness of electronic products is reliable is an important element to reflect the quality of products, so air tightness detection of electronic products becomes an important link to ensure the quality of products.

[0003] At present, in the process of electronic product production, it is common to implement air tightness detection of electronic products by using water immersion detection method or pressure switch air pressure detection method; the above methods can meet certain detection needs, but they still have the following problems:

[0004] 1. When implementing air tightness detection of electronic products by using water immersion detection method, the quality of electronic products is easily harmed by moisture, which is difficult to be applied to the detection of electronic products on a large scale;

[0005] 2. When implementing air tightness detection of electronic products by using pressure switch air pressure detection method, the detection method mainly identifies the leakage pressure based on the fixed pressure set value of the pressure switch to determine the air tightness of products; in actual detection, since the detection pressure is not a fixed pressure value, but a pressure value with large changes, it is difficult to accurately determine the air tightness of electronic products by using the pressure switch, thereby the production quality of electronic products cannot be guaranteed, and the actual application requirements cannot be met.

[0006] How to solve the above problems has become a technical problem to be solved. SUMMARY

[0007] One object of the present application is to provide a high-precision air tightness detector which can accurately determine the air tightness of predetermined electronic products to ensure the quality of the electronic products and is not easy to harm the quality of the electronic products during detection.

[0008] Another object of the present application is to provide a detection method using the above high-precision air tightness detector.

[0009] In order to achieve the above object, the technical solution adopted by the present application is as follows:

[0010] In one aspect, the present application provides a high-precision air tightness detector, comprising a detection clamp for placing a product to be tested; a gas pressure regulator is arranged outside the detection clamp and connected with the product to be tested in the detection clamp to automatically control the internal pressure; the gas pressure regulator comprises a box structure, a vacuum generator is arranged in the box structure, and the vacuum generator is connected with the product to be tested through a gas path control valve island structure arranged on the box structure to automatically implement air tightness detection and safely determine the air tightness of the product to be tested.

[0011] Preferably, the detection clamp comprises a seat body with support foot pads at the bottom, a cavity with an open front end is arranged at the top of the rear side of the seat body, a clamp structure for placing an external product to be tested is arranged at the inner lower end of the cavity, and a limiting structure for limiting the clamp structure together with the external product to be tested in the cavity is also arranged on the cavity, wherein the clamp structure and the limiting structure are electrically connected with a control structure arranged on the seat body.

[0012] Preferably, the clamp structure comprises a bottom plate which can be detachably placed at the inner lower end of the cavity, a fixing seat for placing the product to be tested is arranged at one side of the top of the bottom plate, and the product to be tested has an air tight cavity connected with the gas path control valve island structure, a support plate which cooperates with the limiting structure to stably limit the bottom plate in the cavity is arranged at the corresponding side of the fixing seat at the top of the bottom plate, and an electric push rod is arranged on the support plate away from the fixing seat and electrically connected with the control structure, and the push rod end of the electric push rod penetrates through the support plate and is connected with a movable plate for clamping cooperation with the fixing seat to stably limit the product to be tested.

[0013] Preferably, the limiting structure comprises a slide rod arranged at the four ends of the inner side of the cavity, a limiting plate for clamping cooperation with the support plate to stably limit the bottom plate in the cavity is arranged on the slide rod through a linear bearing, and a down-stroke cylinder is arranged at the top of the cavity and electrically connected with the control structure, and the push rod end of the down-stroke cylinder extends to the inside of the cavity and is fixedly connected with the limiting plate through a floating joint.

[0014] Preferably, the control structure comprises a controller arranged in the inside of the seat body and electrically connected with the electric push rod and the down-stroke cylinder, and a plurality of buttons are arranged at the top of the front side of the seat body and electrically connected with the controller for operating the controller to control the work of the electric push rod and the down-stroke cylinder.

[0015] Preferably, a safety grating is arranged at both ends of the front side of the cavity and electrically connected with the gas path control valve island structure for collecting information of the external object extending into the cavity to stop the air tightness detection work through the gas path control valve island structure.

[0016] Preferably, the box structure comprises a shell with shock-absorbing foot pads at the bottom and a handle at the top, and a touch screen and several lighted buttons are embedded on the front side wall of the shell, wherein the touch screen and lighted buttons are electrically connected with the gas path control valve island structure arranged on the shell.

[0017] Preferably, the gas path control valve island structure comprises an integrated circuit chip arranged inside the shell and located at the upper end of the front side of the vacuum generator, and a valve island arranged inside the shell and located below the integrated circuit chip, a gas storage tank is arranged inside the shell and located at one side of the valve island, and the inlet end of the gas storage tank is connected with a pressure regulating valve embedded on the outer wall of the shell away from the touch screen through a pipeline, the pressure regulating valve is connected with an external gas source through an air inlet arranged on the outer wall of the shell near the pressure regulating valve, and a sensor solenoid valve, a pressure sensor, an exhaust solenoid valve, a test solenoid valve, a vacuum solenoid valve, a vacuum generator solenoid valve, a volume solenoid valve and an air inlet solenoid valve are arranged on the valve island and electrically connected with the corresponding ports of the valve island and the integrated circuit chip, and the exhaust solenoid valve is connected with an air outlet arranged on the outer wall of the shell near the air inlet through a pipeline.

[0018] Preferably, the test solenoid valve is connected with the cavity of the external product to be tested through a pipeline, the air inlet solenoid valve is connected with the outlet end of the gas storage tank, the vacuum generator is connected with the vacuum generator solenoid valve through a pipeline, and the safety grating, vacuum generator, touch screen, lighted buttons and valve island are electrically connected with the integrated circuit chip.

[0019] In another aspect, the application also provides a detection method using the high-precision air tightness detector, which comprises the following steps:

[0020] S1, placing the external product to be tested on the designated position of the detection clamp and implementing position limitation;

[0021] S2, under the limitation of the box structure of the air pressure regulator, connecting the corresponding components of the gas path control valve island structure with the cavity of the product to be tested through a pipeline;

[0022] S3, starting the gas path control valve island structure to implement air tightness detection of the product to be tested according to the requirements, that is, filling the cavity of the product to be tested with a predetermined volume of gas through the gas path control valve island structure, or extracting the predetermined volume of gas in the cavity of the product to be tested through the gas path control valve island structure, then implementing silent pressure stabilization of the cavity of the product to be tested for a predetermined time, monitoring the pressure information before and after stabilization in real time through the gas path control valve island structure and implementing data processing, thereby obtaining the pressure deviation value before and after stabilization, that is, the leakage value, and further accurately determining the air tightness result of the product to be tested.

[0023] Compared with the prior art, the present application has the following beneficial effects:

[0024] In the present application, when it is necessary to implement the air tightness detection on the external electronic product with cavity, i.e. the to-be-detected product, the to-be-detected product is first placed on the specified position of the detection fixture and the position is limited; under the limitation of the box structure of the air pressure regulator, the corresponding components of the air path control valve island structure are connected in airtight manner with the cavity of the to-be-detected product through the pipeline; then the air tightness detection on the to-be-detected product is implemented by starting the air path control valve island structure and the vacuum generator according to the requirement, i.e. the cavity of the to-be-detected product is filled with the predetermined volume of gas through the air path control valve island structure, or the predetermined volume of gas in the cavity of the to-be-detected product is extracted through the cooperation of the air path control valve island structure and the vacuum generator, then the cavity of the to-be-detected product is implemented for a predetermined time of silent pressure stabilization, the pressure information before and after the stabilization is monitored in real time through the air path control valve island structure in the stabilization stage and the data processing is implemented, thus the pressure deviation value before and after the stabilization, i.e. the leakage value, is obtained, and the air tightness result of the to-be-detected product is accurately determined, which can replace the immersion detection method to implement the accurate air tightness detection on the electronic product to ensure the quality of the electronic product when it is delivered, and the quality of the electronic product is not easily damaged; therefore, the present application has the advantages of accurately determining the air tightness of the predetermined electronic product to ensure the quality of the electronic product, and the quality of the electronic product is not easily damaged in the detection process. BRIEF DESCRIPTION OF DRAWINGS

[0025] The present application will be further described below in combination with the drawings and examples.

[0026] Fig. 1 is a structural schematic view of a high-precision air tightness detector according to the present application;

[0027] Fig. 2 is a circuit connection block diagram of a high-precision air tightness detector according to the present application;

[0028] Fig. 3 is a flow chart of a detection method of a high-precision air tightness detector according to the present application.

[0029] Explanation of reference signs: 1, detection clamp, 11, seat body, 12, cavity, 13, clamp structure, 131, bottom plate, 132, fixing seat, 133, support plate, 134, electric push rod, 135, movable plate, 14, limiting structure, 141, sliding rod, 142, linear bearing, 143, limiting plate, 144, downward pressing air cylinder, 145, floating joint, 15, control structure, 151, controller, 152, button, 16, supporting foot pad, 2, air pressure regulator, 21, box body structure, 211, shock absorbing foot pad, 212, handle, 213, shell, 214, touch screen, 215, button with lamp, 22, vacuum generator, 23, air path control valve island structure, 231, integrated circuit chip, 232, valve island, 233, air storage tank, 234, pressure regulating valve, 235, air inlet, 236, sensor solenoid valve, 237, pressure sensor, 238, exhaust solenoid valve, 239, test solenoid valve, 240, vacuum solenoid valve, 241, vacuum generator solenoid valve, 242, volume solenoid valve, 243, air inlet solenoid valve, 244, air outlet, 3, safety light barrier. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all.

[0031] Reference Figs. 1 to 3The utility model discloses a high-precision air tightness detector, including the detection fixture 1 for placing the product to be measured, be equipped with with the product to be measured in the detection fixture 1 is connected to automatically control its internal pressure air pressure regulator 2 in the outside of detection fixture 1, air pressure regulator 2 includes box structure 21, be equipped with vacuum generator 22 in box structure 21 and the vacuum generator 22 is connected with the product to be measured through the air path control valve island structure 23 of the box structure 21 on to automatically implement air tightness detection and then safely determine the air tightness of the product to be measured. In the process of using, when needing to implement air tightness detection to the electronic product with cavity outside, namely the product to be measured, first place the product to be measured on the designated position of detection fixture 1 and implement position limitation, under the limitation of the box structure 21 of air pressure regulator 2, through pipeline, the corresponding component of air path control valve island structure 23 is connected with the cavity of product to be measured, then according to the demand, start air path control valve island structure 23 and vacuum generator 22 work and implement air tightness detection to the product to be measured, namely through air path control valve island structure 23, fill the cavity of product to be measured with predetermined volume of gas, or through air path control valve island structure 23 and vacuum generator 22 cooperation, extract predetermined volume gas in the cavity of product to be measured, then let the cavity of product to be measured implement predetermined time's silence pressure stabilization, in the pressure stabilization stage, through the corresponding component of air path control valve island structure 23, real-time monitoring pressure information before and after pressure stabilization and implement data processing, thereby obtain the pressure deviation value before and after pressure stabilization, namely leak detection value, and then accurately determine the air tightness result of the product to be measured, can replace the accurate air tightness detection of electronic product to implement accurate air tightness detection to the electronic product to guarantee its factory quality, and also not easy to cause harm to the quality of electronic product.

[0032] In the embodiment, the detection clamp 1 comprises a base body 11 with supporting foot pads 16 on the bottom, a front-end open cavity 12 on the top of the rear side of the base body 11, a clamp structure 13 for placing external products to be detected on the inner lower end of the cavity 12, and a limiting structure 14 for limiting the clamp structure 13 together with the external products to be detected in the cavity 12, wherein the clamp structure 13 and the limiting structure 14 are electrically connected with a control structure 15 arranged on the base body 11. The clamp structure 13 comprises a bottom plate 131 detachably placed on the inner lower end of the cavity 12, a fixing seat 132 for placing products to be detected on the top side of the bottom plate 131, wherein the products to be detected have air-tight cavities connected with the air path control valve island structure 23, a supporting plate 133 arranged on the top of the bottom plate 131 corresponding to one side of the fixing seat 132 and cooperating with the limiting structure 14 to stably limit the bottom plate 131 in the cavity 12, an electric push rod 134 arranged on the supporting plate 133 away from the fixing seat 132 and electrically connected with the control structure 15, and a movable plate 135 connected with the push rod end of the electric push rod 134 and clamped with the fixing seat 132 to stably limit the products to be detected. The limiting structure 14 comprises slide rods 141 arranged on the four ends of the inner side of the cavity 12, limiting plates 143 arranged on the slide rods 141 through linear bearings 142 and clamped with the supporting plate 133 to stably limit the bottom plate 131 in the cavity 12, and a downward pressing air cylinder 144 arranged on the top of the cavity 12 and electrically connected with the control structure 15, wherein the push rod end of the downward pressing air cylinder 144 extends to the inner side of the cavity 12 and is fixedly connected with the limiting plate 143 through a floating joint 145. The control structure 15 comprises a controller 151 arranged in the inner side of the base body 11 and electrically connected with the electric push rod 134 and the downward pressing air cylinder 144, and a plurality of buttons 152 arranged on the top of the front side of the base body 11 and electrically connected with the controller 151 for operating the controller 151 to control the electric push rod 134 and the downward pressing air cylinder 144 to work.In the process of use, when the airtightness detection needs to be carried out on the external electronic product with cavity, i.e. the product to be detected, the detection clamp 1 is moved to the designated place by moving the seat body 11 and placed on the predetermined position by the supporting foot pad 16, and the air pressure regulator 2 is moved to the designated place by moving the handle 212 of the box body structure 21 and placed on the predetermined position by the shock-absorbing foot pad 211. Under the limitation of the bottom plate 131, the product to be detected is placed on the fixed seat 132 of the clamp structure 13. Then, the corresponding button 152 of the control structure 15 is started to transmit a signal to the controller 151 to start the work of the electric push rod 134. The electric push rod 134 is started to work by the controller 151. Under the limiting of the support plate 133, the movable plate 135 is driven to move towards the fixed seat 132 by the push rod end of the electric push rod 134, so as to stably limit the product to be detected on the fixed seat 132 by the mutual clamping cooperation of the fixed seat 132 and the movable plate 135. Then, the corresponding button 152 of the control structure 15 is started to transmit a signal to the controller 151 to start the work of the down pressure cylinder 144 of the limiting structure 14. The down pressure cylinder 14 is started to work by the controller 151. Under the limiting of the slide rod 141, the linear bearing 142 is driven to move downwards together with the floating joint 145 and the limiting plate 143 by the push rod end of the down pressure cylinder 14, until the limiting plate 143 and the support plate 133 are in abutting cooperation to stably limit the clamp structure 13 together with the product to be detected on the cavity 12, thereby effectively improving the convenience and safety of use.

[0033] In the embodiment, a safety grating 3 is arranged at the front side of the cavity 12. The safety grating 3 is electrically connected with the air path control valve island structure 23 and used to collect information of the external object extending into the cavity 12 to stop the airtightness detection work by the air path control valve island structure 23. In the process of use, the safety grating 3 collects the information of the external object extending into the cavity 12 in real time and synchronously transmits to the integrated circuit chip 231 of the air path control valve island structure 23 to implement data processing, and then stops the airtightness detection work of the product to be detected by the integrated circuit chip 231. Therefore, the detection effect can be effectively avoided from being affected by human factors and the harm to the human body can be avoided.

[0034] In the embodiment, the box structure 21 comprises a shell 213 with shock-absorbing foot pads 211 at the bottom and a handle 212 at the top, a touch screen 214 and a plurality of lighted buttons 215 are embedded on the front side wall of the shell 213, wherein the touch screen 214 and the lighted buttons 215 are electrically connected with a gas path control valve island structure 23 arranged on the shell 213. The gas path control valve island structure 23 comprises an integrated circuit chip 231 arranged inside the shell 213 and located at the upper end of the front side of the vacuum generator 22, and a valve island 232 arranged inside the shell 213 and located below the integrated circuit chip 231, a gas storage tank 233 is arranged in the shell 213 and located at one side of the valve island 232, and the inlet end of the gas storage tank 233 is connected with a pressure regulating valve 234 embedded on the outer wall of the shell 213 away from the touch screen 214 through a pipeline, the pressure regulating valve 234 is connected with an external gas source through an air inlet 235 arranged on the outer wall of the shell 213 close to one end of the pressure regulating valve 234, and a sensor solenoid valve 236, a pressure sensor 237, an exhaust solenoid valve 238, a test solenoid valve 239, a vacuum solenoid valve 240, a vacuum generator solenoid valve 241, a volume solenoid valve 242 and an air inlet solenoid valve 243 are arranged on the valve island 232 and electrically connected with the corresponding ports of the valve island 232 and the integrated circuit chip 231, the exhaust solenoid valve 238 is connected with an air outlet 244 arranged on the outer wall of the shell 213 close to one end of the air inlet 235 through a pipeline. The test solenoid valve 239 is connected with the cavity of the product to be tested outside through a pipeline, the air inlet solenoid valve 243 is connected with the outlet end of the gas storage tank 233, the vacuum generator 22 is connected with the vacuum generator solenoid valve 241 through a pipeline, and the safety grating 3, the vacuum generator 22, the touch screen 214, the lighted buttons 215 and the valve island 232 are electrically connected with the integrated circuit chip 231. In use, the test solenoid valve 239 of the gas path control valve island structure 23 is connected with the cavity of the product to be tested through a pipeline under the limitation of the shell 213 of the box structure 21 of the air pressure regulator 2.According to the demand, press the button 215 to transmit the test signal to the integrated circuit chip 231, and start the touch screen 214, the valve island 232, the sensor electromagnetic valve 236, the pressure sensor 237, the exhaust electromagnetic valve 238, the test electromagnetic valve 239, the vacuum electromagnetic valve 240, the vacuum generator electromagnetic valve 241, the volume electromagnetic valve 242, the air inlet electromagnetic valve 243, and the vacuum generator 22. According to the demand, select the predetermined detection mode through the touch screen 214 to implement the air tightness detection of the product, that is, when the direct detection mode is used, select the direct detection mode through the touch screen 214, adjust the air inlet through the pressure regulating valve 234 to the appropriate air inlet pressure, then fill the predetermined volume of external air source into the cavity of the product to be tested through the air inlet 235, the air tank 233, the air inlet electromagnetic valve 243, the corresponding cavity of the valve island 232, and the test electromagnetic valve 239 in sequence, then make the cavity of the product to be tested implement the silent pressure stabilization for a predetermined time, and the sensor electromagnetic valve 236 is kept in the open state during the pressure stabilization stage. At this time, the gas in the cavity of the product to be tested enters the pressure sensor 237, the pressure sensor 237 monitors the pressure information before and after the pressure stabilization in real time and transmits it to the integrated circuit chip 231 for data processing, so as to obtain the pressure deviation value before and after the pressure stabilization, that is, the leakage value, and transmit it to the touch screen 214 for synchronous display, so as to accurately determine the air tightness result of the product to be tested. After the test is completed, the exhaust electromagnetic valve 238 is started to work by the integrated circuit chip 231, and the gas in the cavity of the product to be tested is discharged to the external environment through the corresponding cavity of the valve island 232, the exhaust electromagnetic valve 238, and the air outlet 244, so as to complete the air tightness detection in this mode.When the volume detection test mode is adopted, the volume detection test mode is selected by operating the touch screen 214, at this time, the integrated circuit chip 231 controls the intake electromagnetic valve 243 and the volume electromagnetic valve 242 to be in the off state, after the intake is adjusted to the appropriate intake pressure by the pressure regulating valve 234, the external gas source enters the gas storage tank 233 in sequence through the air inlet 235 to implement volume inflation, after the volume inflation time is over, the integrated circuit chip 231 closes the external inflation electromagnetic valve to stop the intake, at the same time, the intake electromagnetic valve 243 and the volume electromagnetic valve 242 are opened, the gas in the gas storage tank 233 enters the cavity of the product to be tested in sequence through the intake electromagnetic valve 243, the corresponding cavity of the valve island 232 and the test electromagnetic valve 239, then the volume electromagnetic valve 242 is closed to make the gas in the cavity of the product to be tested implement the silent pressure stabilization operation in the predetermined time, the sensor electromagnetic valve 236 is maintained in the open state in the pressure stabilization stage, at this time, the gas in the cavity of the product to be tested enters the pressure sensor 237, the pressure information before and after the pressure stabilization is monitored in real time by the pressure sensor 237 and transmitted to the integrated circuit chip 231 to implement data processing, thereby obtaining the pressure deviation value before and after the pressure stabilization, that is, the leakage value and transmitting it to the touch screen 214 to be displayed synchronously so as to accurately determine the air tightness result of the product to be tested by the detection personnel, after the test is completed, the exhaust electromagnetic valve 238 is started to work by the integrated circuit chip 231 to discharge the gas in the cavity of the product to be tested in sequence through the corresponding cavity of the valve island 232, the exhaust electromagnetic valve 238 and the air outlet 244 to the external environment, thereby completing the air tightness detection in this mode.When the negative pressure detection test mode is adopted, the negative pressure detection test mode is selected by operating the touch screen 214, at this time, the integrated circuit chip 231 controls the inlet electromagnetic valve 243 and the volume electromagnetic valve 242 to be in the off state, the vacuum electromagnetic valve 240 and the vacuum generator electromagnetic valve 241 to be in the on state, and simultaneously starts the vacuum generator 22 to work to sequentially draw the gas in the cavity of the product to be tested into the vacuum generator 22 through the test electromagnetic valve 239, the corresponding cavity of the valve island 232, the vacuum electromagnetic valve 240 and the vacuum generator electromagnetic valve 241, so that the negative pressure is formed in the cavity of the product to be tested. Then the integrated circuit chip 231 closes the vacuum electromagnetic valve 240 and the vacuum generator electromagnetic valve 241, so that the cavity of the product to be tested carries out the silent pressure stabilizing operation for a predetermined time. The sensor electromagnetic valve 236 is maintained in the on state during the pressure stabilizing stage, at this time the cavity of the product to be tested is communicated with the pressure sensor 237, the pressure information before and after pressure stabilizing is monitored by the pressure sensor 237 in real time and transmitted to the integrated circuit chip 231 for data processing, so that the pressure deviation value before and after pressure stabilizing, i.e. the leakage value is obtained and transmitted to the touch screen 214 for synchronous display, so that the detection personnel can accurately determine the air tightness result of the product to be tested. After the test is completed, the integrated circuit chip 231 starts the exhaust electromagnetic valve 238 to work to sequentially discharge the gas in the cavity of the product to be tested to the external environment through the exhaust electromagnetic valve 238 and the gas outlet 244, so as to complete the air tightness detection in this mode. The above-mentioned method can replace the water immersion detection method to accurately detect the air tightness of the electronic product to ensure the quality of the electronic product, and also does not easily cause harm to the quality of the electronic product.

[0035] In use, first, when the air tightness of the electronic product with cavity, i.e. the product to be tested, needs to be detected, the detection clamp 1 is moved to the designated place by the moving seat 11 and placed on the predetermined position by the supporting foot pad 16, and the air pressure regulator 2 is moved to the designated place by the handle 212 of the box structure 21 and placed on the predetermined position by the shock absorbing foot pad 211. Under the limitation of the bottom plate 131, the product to be tested is placed on the fixed seat 132 of the clamp structure 13. Then, the corresponding button 152 of the control structure 15 is started to transmit the signal to the controller 151 to start the electric push rod 134. Under the limitation of the support plate 133, the movable plate 135 is driven by the push rod end of the electric push rod 134 to move towards the fixed seat 132, so that the product to be tested is stably limited on the fixed seat 132 by the mutual clamping cooperation of the fixed seat 132 and the movable plate 135. Secondly, the corresponding button 152 of the control structure 15 is started to transmit the signal to the controller 151 to start the down pressure cylinder 144 of the limiting structure 14. Under the limitation of the slide rod 141, the straight line bearing 142 is driven by the push rod end of the down pressure cylinder 14 to move downwards together with the floating joint 145 and the limiting plate 143 towards the support plate 133 until the limiting plate 143 and the support plate 133 are in abutting cooperation to stably limit the clamp structure 13 and the product to be tested on the cavity 12, thereby effectively improving the convenience and safety of use. Then, under the limitation of the shell 213 of the box structure 21 of the air pressure regulator 2, the test electromagnetic valve 239 of the air path control valve island structure 23 is connected to the cavity of the product to be tested by the pipeline.According to the demand, press the button 215 to transmit the test signal to the integrated circuit chip 231, and start the touch screen 214, the valve island 232, the sensor electromagnetic valve 236, the pressure sensor 237, the exhaust electromagnetic valve 238, the test electromagnetic valve 239, the vacuum electromagnetic valve 240, the vacuum generator electromagnetic valve 241, the volume electromagnetic valve 242, the air inlet electromagnetic valve 243, and the vacuum generator 22. According to the demand, select the predetermined detection mode through the touch screen 214 to implement the air tightness detection of the product, that is, when the direct detection mode is used, select the direct detection mode through the touch screen 214, adjust the air inlet through the pressure regulating valve 234 to the appropriate air inlet pressure, then fill the predetermined volume of external air source into the cavity of the product to be tested through the air inlet 235, the air tank 233, the air inlet electromagnetic valve 243, the corresponding cavity of the valve island 232, and the test electromagnetic valve 239 in sequence, then make the cavity of the product to be tested implement the silent pressure stabilization for a predetermined time, and the sensor electromagnetic valve 236 is kept in the open state during the pressure stabilization stage. At this time, the gas in the cavity of the product to be tested enters the pressure sensor 237, the pressure sensor 237 monitors the pressure information before and after the pressure stabilization in real time and transmits it to the integrated circuit chip 231 for data processing, so as to obtain the pressure deviation value before and after the pressure stabilization, that is, the leakage value, and transmit it to the touch screen 214 for synchronous display, so as to accurately determine the air tightness result of the product to be tested. After the test is completed, the exhaust electromagnetic valve 238 is started to work by the integrated circuit chip 231, and the gas in the cavity of the product to be tested is discharged to the external environment through the corresponding cavity of the valve island 232, the exhaust electromagnetic valve 238, and the air outlet 244, so as to complete the air tightness detection in this mode.When the volume detection test mode is adopted, the volume detection test mode is selected by operating the touch screen 214, at this time, the integrated circuit chip 231 controls the intake electromagnetic valve 243 and the volume electromagnetic valve 242 to be in the off state, after the intake is adjusted to the appropriate intake pressure by the pressure regulating valve 234, the external gas source enters the gas storage tank 233 in sequence through the air inlet 235 to implement volume inflation, after the volume inflation time is over, the integrated circuit chip 231 closes the external inflation electromagnetic valve to stop the intake, at the same time, the intake electromagnetic valve 243 and the volume electromagnetic valve 242 are opened, the gas in the gas storage tank 233 enters the cavity of the product to be tested in sequence through the intake electromagnetic valve 243, the corresponding cavity of the valve island 232 and the test electromagnetic valve 239, then the volume electromagnetic valve 242 is closed to make the gas in the cavity of the product to be tested implement the silent pressure stabilization operation in the predetermined time, the sensor electromagnetic valve 236 is maintained in the open state in the pressure stabilization stage, at this time, the gas in the cavity of the product to be tested enters the pressure sensor 237, the pressure information before and after the pressure stabilization is monitored in real time by the pressure sensor 237 and transmitted to the integrated circuit chip 231 to implement data processing, thereby obtaining the pressure deviation value before and after the pressure stabilization, that is, the leakage value and transmitting it to the touch screen 214 to be displayed synchronously so as to accurately determine the air tightness result of the product to be tested by the detection personnel, after the test is completed, the exhaust electromagnetic valve 238 is started to work by the integrated circuit chip 231 to discharge the gas in the cavity of the product to be tested in sequence through the corresponding cavity of the valve island 232, the exhaust electromagnetic valve 238 and the air outlet 244 to the external environment, thereby completing the air tightness detection in this mode.When the negative pressure detection test mode is adopted, the negative pressure detection test mode is selected by operating the touch screen 214, at this time, the integrated circuit chip 231 controls the intake electromagnetic valve 243 and the volume electromagnetic valve 242 to be in the off state, the vacuum electromagnetic valve 240 and the vacuum generator electromagnetic valve 241 to be in the on state, and simultaneously starts the vacuum generator 22 to work, so that the gas in the cavity of the product to be tested is sequentially extracted into the vacuum generator 22 through the test electromagnetic valve 239, the corresponding cavity of the valve island 232, the vacuum electromagnetic valve 240 and the vacuum generator electromagnetic valve 241, so that the negative pressure is formed in the cavity of the product to be tested. Then the integrated circuit chip 231 closes the vacuum electromagnetic valve 240 and the vacuum generator electromagnetic valve 241, so that the cavity of the product to be tested performs silent pressure stabilization for a predetermined time. During the pressure stabilization stage, the sensor electromagnetic valve 236 is maintained in the on state, at this time, the cavity of the product to be tested is communicated with the pressure sensor 237, the pressure sensor 237 monitors the pressure information before and after pressure stabilization in real time and transmits it to the integrated circuit chip 231 for data processing, so as to obtain the pressure deviation value before and after pressure stabilization, that is, the leakage value, and transmit it to the touch screen 214 for synchronous display, so as to accurately determine the air tightness result of the product to be tested. After the test is completed, the exhaust electromagnetic valve 238 is started to work by the integrated circuit chip 231, so that the gas in the cavity of the product to be tested is sequentially discharged to the outside environment through the corresponding cavity of the valve island 232, the exhaust electromagnetic valve 238 and the gas outlet 244, and the air tightness detection in this mode is completed. The above-mentioned method can replace the water immersion detection method to accurately detect the air tightness of the electronic product to ensure its quality, and is not easy to cause harm to the quality of the electronic product; finally, the safety grating 3 collects the information of the external object extending into the cavity 12 in real time and transmits it to the integrated circuit chip 231 of the gas path control valve island structure 23 for data processing, and then the integrated circuit chip 231 stops the air tightness detection of the product to be tested, so as to effectively avoid the influence of human factors on the detection effect and the harm to the human body during the air tightness detection of the product to be tested.

[0036] In this embodiment, a detection method using the high-precision air tightness detector is also provided, which comprises the following steps:

[0037] S1, placing the external product to be tested on the specified position of the detection clamp 1 and performing position limiting;

[0038] S2, under the limitation of the box structure 21 of the air pressure regulator 2, connecting the corresponding components of the gas path control valve island structure 23 with the cavity of the product to be tested through the pipeline;

[0039] S3, according to the requirement, the gas path control valve island structure 23 is started to work to implement the air tightness detection on the product to be detected, that is, a predetermined volume of gas is filled into the cavity of the product to be detected through the gas path control valve island structure 23, or the predetermined volume of gas in the cavity of the product to be detected is extracted through the gas path control valve island structure 23, then the cavity of the product to be detected is implemented for a predetermined time of silent pressure stabilization, the pressure information before and after the pressure stabilization is monitored in real time through the gas path control valve island structure 23 and data processing is implemented, so that the pressure deviation value before and after the pressure stabilization, that is, the leakage value is obtained, and then the air tightness result of the product to be detected is accurately determined.

[0040] In summary, the application has the advantages that the air tightness of the predetermined electronic product can be accurately determined to ensure the quality of the electronic product, and the quality of the electronic product is not easily harmed in the detection process.

[0041] For those skilled in the art, various corresponding changes and modifications can be made according to the technical solutions and concepts described above, and all these changes and modifications should belong to the protection scope of the claims of the application.

Claims

1. A high-precision airtightness detector, comprising a detection clamp (1) for placing a product to be detected; characterized in that: A gas pressure regulator (2) is arranged outside the detection clamp (1) and connected with the product to be detected in the detection clamp (1) to automatically control the internal pressure; the gas pressure regulator (2) comprises a box structure (21), a vacuum generator (22) is arranged in the box structure (21) and connected with the product to be detected through a gas path control valve island structure (23) arranged on the box structure (21) to automatically implement the air tightness detection and further safely determine the air tightness of the product to be detected. The box structure (21) comprises a shell (213) with shock-absorbing foot pads (211) at the bottom and a handle (212) at the top, a touch screen (214) and a plurality of lamp type buttons (215) are embedded on the front side wall of the shell (213), wherein the touch screen (214) and the lamp type buttons (215) are electrically connected with the gas path control valve island structure (23) arranged on the shell (213). The gas path control valve island structure (23) comprises an integrated circuit chip (231) arranged inside the shell (213) and located at the front side upper end of the vacuum generator (22), further comprises a valve island (232) arranged inside the shell (213) and located below the integrated circuit chip (231), a gas storage tank (233) is arranged in the shell (213) and located at one side of the valve island (232), the inlet end of the gas storage tank (233) is connected with a pressure regulating valve (234) embedded on the outer wall of the shell (213) away from the touch screen (214) through a pipeline, the pressure regulating valve (234) is connected with an external gas source through an air inlet (235) arranged on the outer wall of the shell (213) close to one end of the pressure regulating valve (234), further comprises a sensor solenoid valve (236), a pressure sensor (237), an exhaust solenoid valve (238), a test solenoid valve (239), a vacuum solenoid valve (240), a vacuum generator solenoid valve (241), a volume solenoid valve (242) and an air inlet solenoid valve (243) connected with the corresponding ports of the valve island (232) and electrically connected with the integrated circuit chip (231), the exhaust solenoid valve (238) is connected with an air outlet (244) arranged on the outer wall of the shell (213) close to one end of the air inlet (235) through a pipeline.

2. The high precision air tightness detector according to claim 1, characterized in that: The detection clamp (1) comprises a seat body (11) with support foot pads (16) at the bottom, a cavity (12) with an open front end is arranged at the top of the rear side of the seat body (11), a clamp structure (13) for placing the external product to be detected is arranged at the inside lower end of the cavity (12), further comprises a limiting structure (14) for limiting the clamp structure (13) together with the external product to be detected in the cavity (12), wherein the clamp structure (13) and the limiting structure (14) are electrically connected with a control structure (15) arranged on the seat body (11).

3. The high precision air tightness detector according to claim 2, characterized in that: The clamp structure (13) comprises a bottom plate (131) detachably placed at the lower end inside the cavity (12), a fixing seat (132) for placing the product to be tested is arranged on one side of the top of the bottom plate (131), and the product to be tested is provided with a gas-tight cavity connected with the gas path control valve island structure (23); a supporting plate (133) for stably limiting the bottom plate (131) in the cavity (12) is arranged on the top of the bottom plate (131) and corresponds to one side of the fixing seat (132); an electric push rod (134) is arranged on the supporting plate (133) away from the fixing seat (132) and is electrically connected with the control structure (15), and the push rod end of the electric push rod (134) penetrates through the supporting plate (133) and is connected with a movable plate (135) for clamping cooperation with the fixing seat (132) to stably limit the product to be tested.

4. The high precision air tightness detector according to claim 3, characterized in that: The limiting structure (14) comprises a slide rod (141) arranged at the four ends inside the cavity (12), a limiting plate (143) for clamping cooperation with the supporting plate (133) to stably limit the bottom plate (131) in the cavity (12) is arranged on the slide rod (141) through a linear bearing (142), and a downward pressing air cylinder (144) is arranged at the top of the cavity (12) and is electrically connected with the control structure (15), and the push rod end of the downward pressing air cylinder (144) extends to the inside of the cavity (12) and is fixedly connected with the limiting plate (143) through a floating joint (145).

5. The high precision leak detector of claim 4, wherein: The control structure (15) comprises a controller (151) arranged in the inside of the seat body (11) and electrically connected with the electric push rod (134) and the downward pressing air cylinder (144), and a plurality of buttons (152) are arranged on the top of the front side of the seat body (11) and are electrically connected with the controller (151) for operating the controller (151) to control the electric push rod (134) and the downward pressing air cylinder (144) to work.

6. The high precision leak detector of claim 3, wherein: A safety grating (3) is arranged at the two ends of the front side of the cavity (12) and is electrically connected with the gas path control valve island structure (23) for collecting information of an external object inserted into the cavity (12) to stop the air tightness detection work through the gas path control valve island structure (23).

7. The high precision leak detector of claim 6, wherein: The test electromagnetic valve (239) is connected with the cavity of the product to be tested outside through a pipeline, the air inlet electromagnetic valve (243) is connected with the outlet end of the gas storage tank (233), the vacuum generator (22) is connected with the vacuum generator electromagnetic valve (241) through a pipeline, and the safety grating (3), the vacuum generator (22), the touch screen (214), the button with lamp (215), and the valve island (232) are electrically connected with the integrated circuit chip (231).

8. A detection method using the high-precision air tightness detector according to claim 1, characterized in that, The detection method comprises the following steps: S1, placing the product to be tested outside on the specified position of the detection clamp (1) and implementing position limitation; S2, under the limitation of the box structure (21) of the air pressure regulator (2), the corresponding components of the air path control valve island structure (23) are connected with the cavity of the product to be tested through a pipeline; S3, according to the requirement, the air path control valve island structure (23) is started to work to implement the air tightness detection of the product to be tested, that is, a predetermined volume of gas is filled into the cavity of the product to be tested through the air path control valve island structure (23), or a predetermined volume of gas in the cavity of the product to be tested is extracted through the air path control valve island structure (23), then the cavity of the product to be tested is implemented for a predetermined time of silent pressure stabilization, and the pressure information before and after the pressure stabilization is monitored in real time through the air path control valve island structure (23) and data processing is implemented, so as to obtain the pressure deviation value before and after the pressure stabilization, that is, the leakage value, and then the air tightness result of the product to be tested is accurately determined.

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