CN113588182B - System for detecting air tightness of refrigerator - Google Patents
System for detecting air tightness of refrigerator Download PDFInfo
- Publication number
- CN113588182B CN113588182B CN202110859508.7A CN202110859508A CN113588182B CN 113588182 B CN113588182 B CN 113588182B CN 202110859508 A CN202110859508 A CN 202110859508A CN 113588182 B CN113588182 B CN 113588182B
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- pipeline
- valve
- flowmeter
- branch
- refrigerator
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- 238000004891 communication Methods 0.000 claims abstract description 15
- 238000004519 manufacturing process Methods 0.000 claims abstract description 12
- 238000004146 energy storage Methods 0.000 claims description 12
- 238000001514 detection method Methods 0.000 abstract description 15
- 238000000034 method Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 238000004590 computer program Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000010408 sweeping Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
- G01M3/28—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds
- G01M3/2807—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds for pipes
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
- G01M3/28—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds
- G01M3/2807—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds for pipes
- G01M3/2815—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds for pipes using pressure measurements
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M99/00—Subject matter not provided for in other groups of this subclass
- G01M99/005—Testing of complete machines, e.g. washing-machines or mobile phones
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Examining Or Testing Airtightness (AREA)
Abstract
A system for detecting air tightness of a refrigerator relates to the technical field of refrigerator production and is used for solving the problem that air tightness detection is difficult to be carried out on a pipeline of the refrigerator in the production process of the refrigerator. The utility model provides a system for detecting refrigerator gas tightness, includes sweeps yard rifle, first flowmeter, second flowmeter, manometer, gas circuit system and computer, first flowmeter, second flowmeter with the manometer is established respectively in the gas circuit system, sweep yard rifle first flowmeter second flowmeter with the manometer respectively with computer communication connects, the gas circuit system is equipped with the pipeline joint, and the pipeline joint is used for connecting the refrigerator pipeline, sweep yard rifle with the pipeline joint is established around the refrigerator production line.
Description
Technical Field
The invention relates to the technical field of refrigerator production, in particular to a system for detecting air tightness of a refrigerator.
Background
At present, the water pipe of the ice maker of the refrigerator is used for detecting the air tightness in a laboratory, so that the detection of all products on a production line one by one cannot be realized, and the delivery quality of the products cannot be confirmed. The air tightness detection equipment used in the laboratory has high requirements on detection environment and cannot be transplanted to a production line.
Disclosure of Invention
The invention aims to provide a system for detecting the air tightness of a refrigerator, which is used for solving the problem that the air tightness of a pipeline of the refrigerator is difficult to detect in the production process of the refrigerator.
The technical scheme adopted for solving the technical problems is as follows:
The utility model provides a system for detecting refrigerator gas tightness, includes sweeps yard rifle, first flowmeter, second flowmeter, manometer, gas circuit system and computer, first flowmeter, second flowmeter with the manometer is established respectively in the gas circuit system, sweep yard rifle first flowmeter second flowmeter with the manometer respectively with computer communication connects, the gas circuit system is equipped with the pipeline joint, and the pipeline joint is used for connecting the refrigerator pipeline, sweep yard rifle with the pipeline joint is established around the refrigerator production line.
Further, the gas circuit system comprises a main pipeline, a first branch pipeline, a second branch pipeline, a third branch pipeline, a first drainage branch, a second drainage branch and a third drainage branch;
The main pipeline is sequentially connected with a first ball valve, a first pressure reducing valve and a first filter in series from the head end to the tail end;
The first branch pipeline is sequentially connected with a second pressure reducing valve, a first flowmeter, a first electromagnetic valve, a second ball valve, a second filter and the pipeline joint in series from the head end to the tail end;
the second branch pipeline is sequentially connected with a third pressure reducing valve, a second electromagnetic valve, a fourth electromagnetic valve and an exhaust pipe in series from the head end to the tail end;
the third branch pipeline is sequentially connected with a fourth pressure reducing valve, a second flowmeter, a seventh electromagnetic valve and a seventh ball valve in series from the head end to the tail end;
The first drainage branch is sequentially connected with a fifth electromagnetic valve, a third ball valve and a sixth electromagnetic valve from the head end to the tail end, the head end of the first drainage branch is connected with a second branch pipeline at a position between the second electromagnetic valve and the fourth electromagnetic valve, and the tail end of the first drainage branch is connected with the first branch pipeline at a position between the second ball valve and the second filter;
the head end of the second drainage branch is communicated with the third branch pipeline at the tail end of the third branch pipeline. The tail end of the second drainage branch is communicated with the first drainage branch at a position between the third ball valve and the sixth ball valve;
The head end of the first branch pipeline, the head end of the second branch pipeline and the head end of the third branch pipeline are respectively connected with the tail end of the main pipeline;
the third drainage branch comprises a third electromagnetic valve, the head end of the third electromagnetic valve is connected with a third branch pipeline between the fourth pressure reducing valve and the position of the second flowmeter, and the tail end of the second drainage branch is connected with the third branch pipeline between the second flowmeter and the fourth ball valve.
Further, the first electromagnetic valve, the second electromagnetic valve, the third electromagnetic valve, the fourth electromagnetic valve, the fifth electromagnetic valve, the sixth electromagnetic valve and the seventh electromagnetic valve are respectively connected with a PLC controller, and the PLC controller is in communication connection with the computer.
Further, the pressure gauge is connected at a position between the second ball valve and the second filter.
Further, the head end of the main pipeline is connected with an energy storage tank, and the energy storage tank is provided with an air inlet pipe which is used for accessing an air source.
Further, the code scanning gun is in communication connection with the computer through a communication board card.
Further, the first flow meter, the second flow meter, and the pressure meter are communicatively coupled to the computer via an analog quantity module.
The beneficial effects are that:
The invention is used for carrying out pipeline detection work on the refrigerator on the production line. The use mode of the invention is that the identity tag on the refrigerator is obtained through the code scanning gun, so that the computer invokes a program matched with the type of the refrigerator, the head end of the air circuit system is connected with an air source, and the detected pipeline of the refrigerator is connected with the air circuit system. The computer judges the state of the refrigerator pipeline by performing logic operation according to the feedback parameters of the initial pressure, the first flowmeter, the second flowmeter and the pressure gauge of the air source according to the slave program. The state of the refrigerator includes whether there is a leak, whether there is a jam, whether there is a break, etc.
Drawings
FIG. 1 is a schematic diagram of an embodiment of an electronic control unit according to the present invention;
FIG. 2 is a schematic diagram of an embodiment of a gas circuit system according to the present invention;
In the figure: the device comprises an energy storage tank, an 11 first ball valve, a12 first pressure reducing valve, a 13 first filter, a 2 second pressure reducing valve, a 21 first flowmeter, a 22 first electromagnetic valve, a 23 second ball valve, a 24 second filter, a 25 pipeline connector, a 3 third pressure reducing valve, a 31 second electromagnetic valve, a 32 fourth electromagnetic valve, a 33 exhaust pipe, a 4 fourth pressure reducing valve, a 41 second flowmeter, a 42 seventh electromagnetic valve, a 43 fourth ball valve, a 5 fifth electromagnetic valve, a 51 third ball valve, a 52 sixth electromagnetic valve, a 6 manometer, a7 computer, a 71 communication board card, a 72 analog quantity module, a 73PLC controller, an 8 third electromagnetic valve and a 9 code scanning gun.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
With reference to figures 1 and 2 of the drawings,
The utility model provides a system for detect refrigerator gas tightness, including sweeping a yard rifle 9, first flowmeter 21, second flowmeter 41, manometer 6, gas circuit system and computer 7, first flowmeter 21, second flowmeter 41 and manometer 6 are established respectively in the gas circuit system, sweep a yard rifle, first flowmeter 21, second flowmeter 41 and manometer 6 respectively with computer 7 communication connection, the gas circuit system is equipped with pipe joint 25, pipe joint 25 is used for connecting the refrigerator pipeline, sweep a yard rifle and pipe joint 25 and establish around the refrigerator production line.
As shown in fig. 1 and 2, the invention is used for pipeline detection of refrigerators on a production line. The use mode of the invention is that the identity tag on the refrigerator is obtained through the code scanning gun 9, so that a computer invokes a program matched with the type of the refrigerator, the head end of the air circuit system is connected with an air source, and the detected pipeline of the refrigerator is connected with the air circuit system. The computer judges the state of the refrigerator pipeline by performing a logical operation corresponding to the feedback parameters from the program according to the initial pressure of the air source, the first flowmeter 21, the second flowmeter 41 and the pressure gauge 9. The state of the refrigerator includes whether there is a leak, whether there is a jam, whether there is a break, etc.
Further, the gas circuit system comprises a main pipeline, a first branch pipeline, a second branch pipeline, a third branch pipeline, a first drainage branch, a second drainage branch and a third drainage branch; the main pipeline is sequentially connected with a first ball valve 11, a first pressure reducing valve 12 and a first filter 13 in series from the head end to the tail end; the first branch pipeline is sequentially connected with a second pressure reducing valve 2, a first flowmeter 21, a first electromagnetic valve 22, a second ball valve 23, a second filter 24 and a pipeline joint 25 in series from the head end to the tail end; the second branch pipeline is sequentially connected with a third pressure reducing valve 3, a second electromagnetic valve 31, a fourth electromagnetic valve 32 and an exhaust pipe 33 in series from the head end to the tail end; the third branch pipeline is sequentially connected with a fourth pressure reducing valve 4, a second flowmeter 41, a seventh electromagnetic valve 42 and a seventh ball valve in series from the head end to the tail end; the first drainage branch is sequentially connected with a fifth electromagnetic valve 5, a third ball valve 51 and a sixth electromagnetic valve 52 from the head end to the tail end, the head end of the first drainage branch is connected with a second branch pipeline at a position between the second electromagnetic valve 31 and the fourth electromagnetic valve 32, and the tail end of the first drainage branch is connected with the first branch pipeline at a position between the second ball valve 23 and the second filter 24; the head end of the second drainage branch is communicated with the third branch pipeline at the tail end of the third branch pipeline. The tail end of the second drainage branch is communicated with the first drainage branch at a position between the third ball valve 51 and the sixth ball valve; the head end of the first branch pipeline, the head end of the second branch pipeline and the head end of the third branch pipeline are respectively connected with the tail end of the main pipeline; the third drainage branch comprises a third electromagnetic valve 8, the head end of the third electromagnetic valve 8 is connected with a third branch pipeline between the fourth pressure reducing valve 4 and the position of the second flowmeter 41, and the tail end of the second drainage branch is connected with the third branch pipeline between the second flowmeter 41 and the fourth ball valve 43.
Different detection functions are realized by controlling the on-off collocation of the first electromagnetic valve 22, the second electromagnetic valve 31, the third electromagnetic valve 8, the fourth electromagnetic valve 32, the fifth electromagnetic valve 5, the sixth electromagnetic valve 52, the seventh electromagnetic valve 42, the first ball valve 11, the second ball valve 23, the third ball valve 51 and the fourth ball valve 43. Thereby being beneficial to comprehensively detecting the state of the refrigerator. The air flow pressure in the detection process is controlled through the first pressure reducing valve 12, the second pressure reducing valve 2, the third pressure reducing valve 3 and the fourth pressure reducing valve 4, so that the detection device is suitable for different detection works. The first filter 13 and the second filter 24 are used for filtering and drying the gas, thereby being beneficial to ensuring the accuracy of detection parameters and improving the detection precision of detection work.
Further, the first solenoid valve 22, the second solenoid valve 31, the third solenoid valve 8, the fourth solenoid valve 32, the fifth solenoid valve 5, the sixth solenoid valve 52 and the seventh solenoid valve 42 are respectively connected to a PLC controller 73, and the PLC controller 73 is communicatively connected to the computer 7. The first electromagnetic valve 22, the second electromagnetic valve 31, the third electromagnetic valve 8, the fourth electromagnetic valve 32, the fifth electromagnetic valve 5 and the sixth electromagnetic valve 52 are favorably controlled indirectly and automatically through a computer program, and the working efficiency of automatic detection work is favorably improved.
Further, a pressure gauge 6 for detecting a pressure change is connected at a position between the second ball valve 23 and the second filter 24.
Further, the head end of the main pipeline is connected with the energy storage tank 1, and the energy storage tank 1 is provided with an air inlet pipe which is used for accessing an air source. The pressure of the gas is stabilized through the energy storage tank, so that the accuracy of detection work is improved.
Further, the code scanning gun is in communication connection with the computer 7 through the communication board card 71. For communication connection.
Further, the first flowmeter 21, the second flowmeter 41, and the pressure gauge 6 are communicatively connected to the computer 7 through an analog quantity module 72. For facilitating communication connection.
As shown in fig. 1, the operation procedure of detecting the pipeline state by using the invention is as follows:
firstly, inflating; during the inflation, the valves in the closed state are the third electromagnetic valve 8, the seventh electromagnetic valve 42, the fourth ball valve 43, the fourth electromagnetic valve 32, the first electromagnetic valve 22 and the second ball valve 23; the valves in the open state are-the first ball valve 11, the second solenoid valve 31, the fifth solenoid valve 5, the third ball valve 51, and the sixth solenoid valve 52. In the inflation process, the gas flows through the paths of gas source, energy storage tank 1, first ball valve 11, first pressure reducing valve 12, first filter 13, third pressure reducing valve 3, second electromagnetic valve 31, fifth electromagnetic valve 5, third ball valve 51, sixth electromagnetic valve 52, second filter 24, pipeline joint 25 and detected pipeline of the refrigerator.
Secondly, balancing; in this step, the valves in the closed state are-the second solenoid valve 31, the fourth solenoid valve 32, the fifth solenoid valve 5, the third ball valve 51, the first solenoid valve 22 and the second ball valve 23; the valves in the open state are-a first ball valve 11, a first pressure reducing valve 12, a third electromagnetic valve 8, a seventh electromagnetic valve 42, a fourth ball valve 43 and a sixth electromagnetic valve 52; in this step, the main flow path of the gas is: air source, energy storage tank 1, first ball valve 11, first pressure reducing valve 12, first filter 13, fourth pressure reducing valve 4, second flowmeter 41, seventh electromagnetic valve 42, fourth ball valve 43, sixth electromagnetic valve 52, second filter 24, pipeline joint 25 and refrigerator detected pipeline; at the same time, some of the gas will flow through the third solenoid valve 8, thereby balancing the ends of the second flowmeter 41.
Thirdly, maintaining pressure and testing an air tightness result; in this step, the valves in the closed state are-the third solenoid valve 8, the second solenoid valve 31, the fourth solenoid valve 32, the fifth solenoid valve 5, the third ball valve 51, the first solenoid valve 22 and the second ball valve 23; the valves in the open state are-a first ball valve 11, a seventh solenoid valve 42, a fourth ball valve 43 and a sixth solenoid valve 52; in this step, the gas flow path is gas source, energy storage tank 1, first ball valve 11, first pressure reducing valve 12, first filter 13, fourth pressure reducing valve 4, second flowmeter 41, seventh electromagnetic valve 42, fourth ball valve 43, sixth electromagnetic valve 52, second filter 24, pipe joint 25, and refrigerator detected pipeline.
Fourth, exhausting, and ending the air tightness test; in this step, the valves in the closed state are-the first ball valve 11, the third solenoid valve 8, the seventh solenoid valve 42, the fourth ball valve 43, the second solenoid valve 31, the first solenoid valve 22 and the second ball valve 23; the valves in the open state have a sixth solenoid valve 52, a third ball valve 51, a fifth solenoid valve 5 and a fourth solenoid valve 32; the exhaust path is the detected pipeline of the refrigerator, the pipeline joint 25, the second filter 24, the sixth electromagnetic valve 52, the third ball valve 51, the fifth electromagnetic valve 5, the fourth electromagnetic valve 32 and the exhaust pipe 33. In the process, the second filter can be scoured in the forming direction, so that the air permeability of the second filter is guaranteed.
Fifthly, testing the blockage or the folding of the refrigerator pipeline through a first flowmeter; during this step, the valves in the closed state are-solenoid valve 8, seventh solenoid valve 42, fourth ball valve 43, second solenoid valve 31, fourth solenoid valve 32, fifth solenoid valve 5, third ball valve 51, sixth solenoid valve 52; the valves in the open state are-a first ball valve 11, a first solenoid valve 22 and a second ball valve 23; in this step, the flow path of the gas is: air source, energy storage tank 1, first ball valve 11, first pressure reducing valve 12, first filter 13, second pressure reducing valve 2, first flowmeter 21, first electromagnetic valve 22, second ball valve 23, second filter 24, pipe joint 25 and refrigerator detected pipeline.
In the process, the computer carries out logic operation according to the feedback parameters of the initial pressure, the first flowmeter, the second flowmeter and the pressure gauge of the air source according to the corresponding program, so as to judge the state of the refrigerator pipeline. The state of the refrigerator includes whether there is a leak, whether there is a jam, whether there is a break, etc.
Claims (5)
1. The system for detecting the air tightness of the refrigerator is characterized by comprising a code scanning gun, a first flowmeter, a second flowmeter, a pressure gauge, an air circuit system and a computer, wherein the first flowmeter, the second flowmeter and the pressure gauge are respectively arranged in the air circuit system, the code scanning gun, the first flowmeter, the second flowmeter and the pressure gauge are respectively in communication connection with the computer, the air circuit system is provided with a pipeline connector, the pipeline connector is used for connecting a refrigerator pipeline, and the code scanning gun and the pipeline connector are arranged around a refrigerator production line; the gas circuit system comprises a main pipeline, a first branch pipeline, a second branch pipeline, a third branch pipeline, a first drainage branch, a second drainage branch and a third drainage branch;
The main pipeline is sequentially connected with a first ball valve, a first pressure reducing valve and a first filter in series from the head end to the tail end;
The first branch pipeline is sequentially connected with a second pressure reducing valve, a first flowmeter, a first electromagnetic valve, a second ball valve, a second filter and the pipeline joint in series from the head end to the tail end;
the second branch pipeline is sequentially connected with a third pressure reducing valve, a second electromagnetic valve, a fourth electromagnetic valve and an exhaust pipe in series from the head end to the tail end;
the third branch pipeline is sequentially connected with a fourth pressure reducing valve, a second flowmeter, a seventh electromagnetic valve and a seventh ball valve in series from the head end to the tail end;
The first drainage branch is sequentially connected with a fifth electromagnetic valve, a third ball valve and a sixth electromagnetic valve from the head end to the tail end, the head end of the first drainage branch is connected with a second branch pipeline at a position between the second electromagnetic valve and the fourth electromagnetic valve, and the tail end of the first drainage branch is connected with the first branch pipeline at a position between the second ball valve and the second filter;
The head end of the second drainage branch is communicated with the third branch pipeline at the tail end of the third branch pipeline, and the tail end of the second drainage branch is communicated with the first drainage branch at the position between the third ball valve and the sixth ball valve;
The head end of the first branch pipeline, the head end of the second branch pipeline and the head end of the third branch pipeline are respectively connected with the tail end of the main pipeline;
The third drainage branch comprises a third electromagnetic valve, the head end of the third electromagnetic valve is connected with a third branch pipeline between the position of the fourth pressure reducing valve and the position of the second flowmeter, and the tail end of the second drainage branch is connected with the third branch pipeline between the position of the second flowmeter and the position of the fourth ball valve;
the code scanning gun is in communication connection with the computer through a communication board card.
2. The system for detecting air tightness of a refrigerator according to claim 1, wherein the first solenoid valve, the second solenoid valve, the third solenoid valve, the fourth solenoid valve, the fifth solenoid valve, the sixth solenoid valve and the seventh solenoid valve are respectively connected with a PLC controller, and the PLC controller is in communication connection with the computer.
3. A system for detecting air tightness of a refrigerator according to claim 1, wherein said pressure gauge is connected at a position between said second ball valve and said second filter.
4. The system for detecting air tightness of a refrigerator according to claim 1, wherein a head end of the main pipeline is connected with an energy storage tank, and the energy storage tank is provided with an air inlet pipe for accessing an air source.
5. The system for detecting air tightness of a refrigerator according to claim 1, wherein the first flowmeter, the second flowmeter and the pressure gauge are communicatively connected to the computer through an analog quantity module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110859508.7A CN113588182B (en) | 2021-07-28 | 2021-07-28 | System for detecting air tightness of refrigerator |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110859508.7A CN113588182B (en) | 2021-07-28 | 2021-07-28 | System for detecting air tightness of refrigerator |
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| Publication Number | Publication Date |
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| CN113588182A CN113588182A (en) | 2021-11-02 |
| CN113588182B true CN113588182B (en) | 2024-06-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110859508.7A Active CN113588182B (en) | 2021-07-28 | 2021-07-28 | System for detecting air tightness of refrigerator |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN215374397U (en) * | 2021-07-28 | 2021-12-31 | 青岛科发高技术工程有限公司 | System for detecting air tightness of refrigerator |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| RU2393380C1 (en) * | 2009-01-27 | 2010-06-27 | Общество С Ограниченной Ответственностью "Газпромэнергодиагностика" | Method for measurement of gas flow through untight gate of closed ball valve of stop and control valves of manifold pipeline and device for its implementation |
| CN103335798B (en) * | 2013-06-27 | 2016-05-11 | 东莞市骏泰精密机械有限公司 | A kind of soft package lithium battery air tightness detection machine and detection method thereof |
| CN106840547A (en) * | 2017-03-30 | 2017-06-13 | 杭州电子科技大学 | A kind of batteries of electric automobile bag air-tightness detection device and detection method |
| CN108918053A (en) * | 2018-07-12 | 2018-11-30 | 罗莱生活科技股份有限公司 | Exchange heat mattress sealing ventilation tester and test method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN215374397U (en) * | 2021-07-28 | 2021-12-31 | 青岛科发高技术工程有限公司 | System for detecting air tightness of refrigerator |
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