CN201867290U - Air tightness testing device for automobile air-conditioning box - Google Patents
Air tightness testing device for automobile air-conditioning box Download PDFInfo
- Publication number
- CN201867290U CN201867290U CN 201020582611 CN201020582611U CN201867290U CN 201867290 U CN201867290 U CN 201867290U CN 201020582611 CN201020582611 CN 201020582611 CN 201020582611 U CN201020582611 U CN 201020582611U CN 201867290 U CN201867290 U CN 201867290U
- Authority
- CN
- China
- Prior art keywords
- air
- valve
- way solenoid
- solenoid valve
- pressure
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Examining Or Testing Airtightness (AREA)
Abstract
The utility model relates to the field of automobile air-conditioner, particularly to an air tightness testing device for an automobile air-conditioning box. The air tightness testing device for the automobile air-conditioning box comprises an air inlet connector component, a first-class buffer, an adjusting valve, a pressure gauge, an air filter, a first three-way electromagnetic valve, a second-class buffer, a second three-way electromagnetic valve, a flow meter component, a third three-way electromagnetic valve, a fourth three-way electromagnetic valve, a T-shaped three-way connecting pipe, a switch valve and a vacuum pump, which are sequentially connected in series; the air tightness testing device for automobile air-conditioning box can choose either positive-pressure mode testing or negative-pressure mode testing. Flow measurement modes with different measurement ranges can also be chosen as directed at different measuring ranges. When the positive-pressure testing is being carried out by the air tightness testing device for automobile air-conditioning box, a positive-pressure air source has multiple choices, and both the positive-pressure and negative-pressure testing adopt the same set of buffering and flow testing system; by adopting the design, not only cost is saved, but also the design of system pipeline is simplified, and the measuring data under different working conditions has comparability.
Description
Technical field
The utility model relates to the air conditioning for automobiles field, relates in particular to a kind of air conditioning for automobiles case air tightness test device.
Background technology
The air-conditioning box of air conditioning for automobiles is responsible for the humiture of whole environment inside car and is regulated, no matter in outer circulation, air is all answered after the wherethrough reason into the car; Under the different operating modes, the pressure in the air-conditioning box can change to some extent, if the poor sealing of air-conditioning box own, when its internal pressure and ambient pressure are inconsistent, can produce leakage of air or infiltration.Air leakage rate/infiltration capacity is to weigh the bubble-tight standard of air conditioning box body, if the air-conditioning box impermeability is bad, leakage rate/infiltration capacity surpasses certain standard, will influence the aerial temperature and humidity after handling in the air-conditioning box, thereby influences the control of environment inside car humiture.Therefore, accurately measure the air leakage rate/infiltration capacity of air conditioning box body under certain pressure, then can accurately weigh the sealing of casing, can provide accurate data, for the quality testing of product provides important reference frame for the exploitation and the improvement of new product.Simultaneously also can provide important parameters for troubleshooting of faults.
Summary of the invention
Technical problem to be solved in the utility model provides a kind of air conditioning for automobiles case air-tight test system, and this pilot system is switched by one group of three-way solenoid valve, promptly can be used for the malleation test and also can be used for the negative pressure test, and easy to operate, metering accurately.
The utility model is achieved in that a kind of air conditioning for automobiles case air-tight test system, comprises by pipeline intake interface assembly in sequential series, first-level buffer device, variable valve, tensimeter, air strainer, first three-way solenoid valve, level 2 buffering device, second three-way solenoid valve, flow meter assembly, the 3rd three-way solenoid valve, the 4th three-way solenoid valve, T type t-joint, switch valve and vacuum pump; Described first three-way solenoid valve and the vacant interface of the 4th three-way solenoid valve are parallel with differential pressure transmitter, and the vacant interface of described T type t-joint is parallel with micrometering valve.
Be parallel with operation valve, male contact and the restrictor that is connected in series in turn between described first three-way solenoid valve and the air strainer.
The differential pressure transmitter in parallel with the vacant interface of described first three-way solenoid valve and the 4th three-way solenoid valve is same differential pressure transmitter.
Described flow meter assembly is formed in parallel by ultrasonic vortex shedding flow meter and vortex flowmeter, is in series with flowmeter on the described vortex flowmeter and takes over assembly.
Described intake interface assembly is formed in parallel by the gentle bottle graft head of gas source connector.
Described switch valve is the high vacuum diaphragm valve, and the high vacuum diaphragm valve is connected in the pipeline by the diaphragm valve adapter assembly.
Described micrometering valve is the high vacuum micrometering valve, and the high vacuum micrometering valve is associated in the pipeline by vacuum adapter component string.
The utility model air conditioning for automobiles case air-tight test system is when carrying out the malleation test, and the malleation source of the gas can have a plurality of selections, both can be connected to air compressor machine and plant area's compressed air line, also can be connected to pressurized gas bottle, can adapt to different gas source conditions.System is switched by one group of three-way solenoid valve, and same set of buffering and flow testing system are adopted in positive negative pressure test, and such design not only can be saved cost, has also simplified the system pipeline design.Simultaneously, the measurement data under the different operating modes also has comparability.Flow meter assembly adopts the parallel connection design of big or small range flowmeter, switches by two three-way solenoid valves.Such design can be measured the air mass flow under the different flow scope accurately, has guaranteed measuring accuracy.Have snubber assembly in the system pipeline, can guarantee the steady of the interior air draught of pipeline, guarantee measuring accuracy, simultaneously, the straight length that certain-length is all designed in two flowmeter front and back reduces the influence that phenomenons such as pressurized air turbulent flow, vortex cause measurement.
Description of drawings
Fig. 1 is the utility model air conditioning for automobiles case air-tight test system structural representation.
Among the figure: 1 malleation origin, 2 gas source connectors, 3 gas cylinder joints, 4 first-level buffer devices, 51 variable valve, 52 tensimeters, 53 air strainers, 6 operation valves, 7 male contacts, 8 restrictors, 91 first three-way solenoid valves, 92 second three-way solenoid valves, 93 the 3rd three-way solenoid valves, 94 the 4th three-way solenoid valves, 10 level 2 buffering devices, 11 ultrasonic vortex shedding flow meters, 12 vortex flowmeters, 13 flowmeters are taken over assembly, 14 malleation testpieces, 15 negative pressure testpieces, 16 differential pressure transmitters, 17T type t-joint, 18 vacuum adapter assemblies, 19 micrometering valves, 20 diaphragm valve adapter assemblies, 21 switch valves, 22 vacuum pump adapters, 23 vacuum pumps.
Embodiment
Below in conjunction with specific embodiment, further set forth the utility model.Should be understood that these embodiment only to be used to the utility model is described and be not used in the restriction scope of the present utility model.Should be understood that in addition those skilled in the art can make various changes or modifications the utility model after the content of having read the utility model statement, these equivalent form of values fall within the application's appended claims institute restricted portion equally.
As shown in Figure 1, a kind of air conditioning for automobiles case air-tight test system, comprise by pipeline intake interface assembly in sequential series, first-level buffer device 4, variable valve 51, tensimeter 52, air strainer 53, first three-way solenoid valve 91, level 2 buffering device 10, second three-way solenoid valve 92, flow meter assembly, the 3rd three-way solenoid valve 93, the 4th three-way solenoid valve 94, T type t-joint 17, switch valve 21 and vacuum pump 23, described in the present embodiment switch valve 21 is the high vacuum diaphragm valve, the high vacuum diaphragm valve is connected in the pipeline by diaphragm valve adapter assembly 20, and vacuum pump 23 is connected in the pipeline by vacuum pump adapter 22; Described first three-way solenoid valve 91 and the 4th three-way solenoid valve 94 vacant interfaces are parallel with differential pressure transmitter 16, described T type t-joint 17 vacant interfaces are parallel with, and described in the present embodiment micrometering valve 19 is the high vacuum micrometering valve by 18 series connection of vacuum adapter assembly.
In the present embodiment for reaching the purpose of accurate control and measurement, flow meter assembly in this pilot system pipeline is formed in parallel by ultrasonic vortex shedding flow meter 11 and vortex flowmeter 12, be in series with flowmeter on the described vortex flowmeter 12 and take over assembly 13, second three-way solenoid valve 92 and the 3rd three-way solenoid valve 93 are selected to switch as required, so that accurately measure, control the flow of different range ability air; Two flowmeter front and back can also increase the straight length of one section certain-length, and straight length adopts stainless steel or copper pipeline, to reduce the influence that phenomenons such as pressurized air turbulent flow, vortex cause measurement.
In order to prevent when malleation is tested the excessive damage equipment of air pressure in the pipeline, be parallel with operation valve 6, male contact 7 and the restrictor 8 that is connected in series in turn between described first three-way solenoid valve 91 and the air strainer 53, can open operation valve 6 venting when needed.
In order to save equipment occupation space and cost, the differential pressure transmitter 16 of the interface parallel connection that described in the present embodiment first three-way solenoid valve 91 and the 4th three-way solenoid valve 94 are vacant is same differential pressure transmitter 16, and described in addition variable valve 51, tensimeter 52 and air strainer 53 are for being integrated into the three linked piece of an integral body.
Described in the present embodiment intake interface assembly is formed in parallel by gas source connector 2 gentle bottle graft heads 3; When malleation was tested, malleation source of the gas 1 can have a plurality of selections like this, can be connected to air compressor machine, can be connected to plant area's compressed air line, also can be connected to pressurized gas bottle, to adapt to different gas source conditions.
When carrying out the malleation test, malleation source of the gas 1 can also can provide pressurized air by gas cylinder from the source of the gas of air compressor machine, pressurized air at first enters a first-level buffer device 4, and first-level buffer device 4 is a minibuffer, reduces the influence of pressurized air to system pipeline and follow-up measuring sensor.Pressurized air enters three linked piece after first-level buffer device 4 comes out, can monitor the compressed air pressure situation herein.Pipeline behind the three linked piece is connected to operation valve 6, and this operation valve 6 both can pass through manual shift, also can control compressed-air actuated flow by control automatically, and then the differential pressure of energy control system and external atmosphere pressure.Pressurized air by operation valve 6 enters level 2 buffering device 10 through first three-way solenoid valve 91, and first three-way solenoid valve 91 herein is used for switching the pipeline of malleation and negative pressure test.With 94 actions of the 4th three-way solenoid valve, control is switched.Level 2 buffering device 10 volumes herein are bigger, can unload the impulsive force of pipeline compressed air fully, the accuracy of dependable flow measuring results.After pressurized air comes out from level 2 buffering device 10, through flow meter assembly, a wide range flowmeter and a small amount of range of flow meter, these two flowmeter parallel connections are arranged herein, switch different range test specifications by second three-way solenoid valve 92 with the 3rd three-way solenoid valve 93, common actions is switched.Such design can guarantee accurately to measure the air mass flow of passing through.Can switch at any time by the guidance panel switch.Pressurized air is after the 4th three-way solenoid valve 94 comes out, enter malleation testpieces 14 through pipeline, malleation testpieces 14 connects an other pipeline simultaneously to differential pressure transmitter 16, this differential pressure transmitter 16 compares in the malleation testpieces 14 and the pressure differential of external atmosphere pressure, and the differential pressure of measuring system and external atmosphere pressure.Can pass through operation valve 6, the control compressed air require, and then control this differential pressure value, to reach established standards.After treating that differential pressure is stable, can determine the leakage rate of air conditioning box body by the displayed value of flowmeter.This measurement result can be investigated the impermeability of air conditioning box body direct draught.
For the bubble-tight test of air conditioning for automobiles casing negative pressure:
When carrying out the negative pressure test, 23 pairs of systems vacuumize by vacuum pump.Can pass through high vacuum micrometering valve 19 regulating system vacuum tightnesss.Negative pressure testpieces 15 is connected between first three-way solenoid valve 91 and the differential pressure transmitter 16.Switch to the negative pressure test macro by first three-way solenoid valve 91 and the 4th three-way solenoid valve 94.After negative pressure testpieces 15 connects, air in the negative pressure testpieces 15 enters level 2 buffering device 10 bufferings through pipeline by first three-way solenoid valve 91, pass through flow meter assembly (can switch different range test specifications with the 3rd three-way solenoid valve 93) then and be connected to high vacuum micrometering valve 19 through the 4th three-way solenoid valve 94 again, be connected to high vacuum diaphragm valve 21 and vacuum pump 23 then by second three-way solenoid valve 92.Buffering and flow measurement are tested with malleation, and by valve regulated, vacuum tightness that can control system is then by the reading confirmed test part of differential pressure transmitter and the difference between the atmospheric pressure.When difference reach and customize and stable after, the infiltration capacity of reading confirmed test part air-conditioning box that can be by flowmeter.This measurement result can be investigated the impermeability under the air conditioning box body negative pressure.
Claims (7)
1. an air conditioning for automobiles case air-tight test system is characterized in that: comprise by pipeline intake interface assembly in sequential series, first-level buffer device (4), variable valve (51), tensimeter (52), air strainer (53), first three-way solenoid valve (91), level 2 buffering device (10), second three-way solenoid valve (92), flow meter assembly, the 3rd three-way solenoid valve (93), the 4th three-way solenoid valve (94), T type t-joint (17), switch valve (21) and vacuum pump (23); Described first three-way solenoid valve (91) and the vacant interface of the 4th three-way solenoid valve (94) are parallel with differential pressure transmitter (16), and the vacant interface of described T type t-joint (17) is parallel with micrometering valve (19).
2. air conditioning for automobiles case air-tight test system as claimed in claim 1 is characterized in that: be parallel with operation valve (6), male contact (7) and the restrictor (8) that is connected in series in turn between described first three-way solenoid valve (91) and the air strainer (53).
3. air conditioning for automobiles case air-tight test system as claimed in claim 1 or 2 is characterized in that: the differential pressure transmitter (16) in parallel with the vacant interface of described first three-way solenoid valve (91) and the 4th three-way solenoid valve (94) is same differential pressure transmitter (16).
4. air conditioning for automobiles case air-tight test system as claimed in claim 1 or 2, it is characterized in that: described flow meter assembly is formed in parallel by ultrasonic vortex shedding flow meter (11) and vortex flowmeter (12), is in series with flowmeter on the described vortex flowmeter (12) and takes over assembly (13).
5. air conditioning for automobiles case air-tight test system as claimed in claim 1 or 2 is characterized in that: described intake interface assembly is formed in parallel by the gentle bottle graft head of gas source connector (2) (3).
6. air conditioning for automobiles case air-tight test system as claimed in claim 5 is characterized in that: described switch valve (21) is the high vacuum diaphragm valve, and the high vacuum diaphragm valve is connected in the pipeline by diaphragm valve adapter assembly (20).
7. air conditioning for automobiles case air-tight test system as claimed in claim 5 is characterized in that: described micrometering valve (19) is the high vacuum micrometering valve, and the high vacuum micrometering valve is connected in the pipeline by vacuum adapter assembly (18).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201020582611 CN201867290U (en) | 2010-10-29 | 2010-10-29 | Air tightness testing device for automobile air-conditioning box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201020582611 CN201867290U (en) | 2010-10-29 | 2010-10-29 | Air tightness testing device for automobile air-conditioning box |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201867290U true CN201867290U (en) | 2011-06-15 |
Family
ID=44138442
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201020582611 Expired - Fee Related CN201867290U (en) | 2010-10-29 | 2010-10-29 | Air tightness testing device for automobile air-conditioning box |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201867290U (en) |
Cited By (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102393283A (en) * | 2011-09-15 | 2012-03-28 | 昆山迈致治具科技有限公司 | Vacuum pressure testing jig |
| CN102426083A (en) * | 2011-08-18 | 2012-04-25 | 奇瑞汽车股份有限公司 | Leak detection apparatus of automotive air conditioning system pipeline |
| CN103743555A (en) * | 2013-12-20 | 2014-04-23 | 安徽铜冠机械股份有限公司 | Filter-board detection device |
| CN103890556A (en) * | 2011-10-26 | 2014-06-25 | 丰田自动车株式会社 | Leak test method and leak test apparatus |
| CN104535268A (en) * | 2014-12-24 | 2015-04-22 | 广州精益汽车空调有限公司 | Air-conditioner waterproof airtightness testing system and method |
| CN104748985A (en) * | 2014-12-09 | 2015-07-01 | 青岛海能阿尔派轨道电力设备工程科技有限公司 | Compressed air pipeline for gas tight test comprehensive experiment table |
| CN105628420A (en) * | 2015-12-25 | 2016-06-01 | 北海绩迅电子科技有限公司 | Device for detecting recycled cartridge air guide loop |
| CN106647830A (en) * | 2017-03-20 | 2017-05-10 | 挪度医疗器械（苏州）有限公司 | Air source control system capable of stably outputting airflow and application method of air source control system |
| CN107907274A (en) * | 2017-12-18 | 2018-04-13 | 昆山巧亿仁电子科技有限公司 | A kind of waterproof test equipment |
| CN108072499A (en) * | 2017-11-24 | 2018-05-25 | 重庆赛格尔汽车配件有限公司 | A kind of bilayer air-conditioner pipe air tightness detection system and method |
| CN108507781A (en) * | 2018-07-04 | 2018-09-07 | 山东航空股份有限公司 | A kind of aircraft fuel tank release of pressure valve tester and test method |
| CN108827557A (en) * | 2018-07-25 | 2018-11-16 | 苏州佐竹冷热控制技术有限公司 | A kind of compressed air type leakage amount measuring device for electricity |
| CN109050967A (en) * | 2018-05-03 | 2018-12-21 | 合肥江航飞机装备有限公司 | A kind of equipment can detecte aircraft oxygen system performance |
| CN109141782A (en) * | 2018-09-18 | 2019-01-04 | 昆明北方红外技术股份有限公司 | The airtight test of ultralow pressure and gas substitution detector |
| CN109282952A (en) * | 2018-08-29 | 2019-01-29 | 西北工业大学 | Positive and negative constant pressure sealing property detection system and method |
| CN109307575A (en) * | 2018-12-03 | 2019-02-05 | 金鑫美莱克空调系统（无锡）有限公司 | Rail traffic air-conditioning system airtight detecting apparatus and method |
| CN111380659A (en) * | 2020-03-20 | 2020-07-07 | 中国北方车辆研究所 | Airtightness testing device and method for power battery water cooling system |
| CN112834130A (en) * | 2020-12-31 | 2021-05-25 | 湖北诚胜测控科技有限公司 | High pressure and vacuum circuit leakproofness testing arrangement |
| CN112903209A (en) * | 2021-02-08 | 2021-06-04 | 陕西长岭特种设备股份有限公司 | Air tightness detection method for shelter air conditioning equipment |
| CN114152288A (en) * | 2021-12-02 | 2022-03-08 | 重庆福瑞斯自动化设备股份有限公司 | Air conditioner box detection device and detection method |
-
2010
- 2010-10-29 CN CN 201020582611 patent/CN201867290U/en not_active Expired - Fee Related
Cited By (22)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102426083A (en) * | 2011-08-18 | 2012-04-25 | 奇瑞汽车股份有限公司 | Leak detection apparatus of automotive air conditioning system pipeline |
| CN102393283A (en) * | 2011-09-15 | 2012-03-28 | 昆山迈致治具科技有限公司 | Vacuum pressure testing jig |
| CN103890556A (en) * | 2011-10-26 | 2014-06-25 | 丰田自动车株式会社 | Leak test method and leak test apparatus |
| CN103743555A (en) * | 2013-12-20 | 2014-04-23 | 安徽铜冠机械股份有限公司 | Filter-board detection device |
| CN104748985A (en) * | 2014-12-09 | 2015-07-01 | 青岛海能阿尔派轨道电力设备工程科技有限公司 | Compressed air pipeline for gas tight test comprehensive experiment table |
| CN104535268A (en) * | 2014-12-24 | 2015-04-22 | 广州精益汽车空调有限公司 | Air-conditioner waterproof airtightness testing system and method |
| CN104535268B (en) * | 2014-12-24 | 2017-07-07 | 广州精益汽车空调有限公司 | A kind of air-conditioning waterproof seal test system and method for testing |
| CN105628420A (en) * | 2015-12-25 | 2016-06-01 | 北海绩迅电子科技有限公司 | Device for detecting recycled cartridge air guide loop |
| CN105628420B (en) * | 2015-12-25 | 2018-08-24 | 北海绩迅电子科技有限公司 | A kind of device in detection ink horn of regeneration air guide circuit |
| CN106647830A (en) * | 2017-03-20 | 2017-05-10 | 挪度医疗器械（苏州）有限公司 | Air source control system capable of stably outputting airflow and application method of air source control system |
| CN108072499A (en) * | 2017-11-24 | 2018-05-25 | 重庆赛格尔汽车配件有限公司 | A kind of bilayer air-conditioner pipe air tightness detection system and method |
| CN107907274A (en) * | 2017-12-18 | 2018-04-13 | 昆山巧亿仁电子科技有限公司 | A kind of waterproof test equipment |
| CN109050967A (en) * | 2018-05-03 | 2018-12-21 | 合肥江航飞机装备有限公司 | A kind of equipment can detecte aircraft oxygen system performance |
| CN108507781A (en) * | 2018-07-04 | 2018-09-07 | 山东航空股份有限公司 | A kind of aircraft fuel tank release of pressure valve tester and test method |
| CN108827557A (en) * | 2018-07-25 | 2018-11-16 | 苏州佐竹冷热控制技术有限公司 | A kind of compressed air type leakage amount measuring device for electricity |
| CN109282952A (en) * | 2018-08-29 | 2019-01-29 | 西北工业大学 | Positive and negative constant pressure sealing property detection system and method |
| CN109141782A (en) * | 2018-09-18 | 2019-01-04 | 昆明北方红外技术股份有限公司 | The airtight test of ultralow pressure and gas substitution detector |
| CN109307575A (en) * | 2018-12-03 | 2019-02-05 | 金鑫美莱克空调系统（无锡）有限公司 | Rail traffic air-conditioning system airtight detecting apparatus and method |
| CN111380659A (en) * | 2020-03-20 | 2020-07-07 | 中国北方车辆研究所 | Airtightness testing device and method for power battery water cooling system |
| CN112834130A (en) * | 2020-12-31 | 2021-05-25 | 湖北诚胜测控科技有限公司 | High pressure and vacuum circuit leakproofness testing arrangement |
| CN112903209A (en) * | 2021-02-08 | 2021-06-04 | 陕西长岭特种设备股份有限公司 | Air tightness detection method for shelter air conditioning equipment |
| CN114152288A (en) * | 2021-12-02 | 2022-03-08 | 重庆福瑞斯自动化设备股份有限公司 | Air conditioner box detection device and detection method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201867290U (en) | Air tightness testing device for automobile air-conditioning box | |
| CN202471374U (en) | Multifunctional airtightness detection apparatus | |
| CN201348557Y (en) | Air leakage rate field test apparatus for air conditioner | |
| CN100585359C (en) | Gas pressure regulator test device | |
| CN201803832U (en) | Tester using acoustic emission signals to detect valve leakage | |
| US9429493B2 (en) | Manifold assembly for a portable leak tester | |
| CN204228385U (en) | A kind of off-line testing device for demarcating safety valve setting value and off-line testing system | |
| CN200993614Y (en) | Air conditioner noise-aircurrent measurement laboratory | |
| CN113720555B (en) | Detection device and method for oil and gas pipeline ball valve internal leakage | |
| CN105181355A (en) | Multifunctional testing device of air brake system of tractor transportation unit | |
| CN112284649A (en) | Multi-pipeline pressure flow coefficient testing device and testing method | |
| CN202748203U (en) | Automobile air inlet system component integrated testing apparatus | |
| CN110657982A (en) | Breather valve capability test system | |
| CN112857694A (en) | Movable constant-pressure sealing detection system | |
| CN210319411U (en) | Fuel cell hydrogen supply system test platform | |
| JPH10185749A (en) | Method and apparatus for leak inspection | |
| CN112179580A (en) | Leak detection device and leak detection method | |
| CN218030558U (en) | Durability test bed for hydrogen circulating pump | |
| CN110763868A (en) | Flow velocity and pressure integrated measuring instrument for online monitoring of flue gas by using pitot tube method | |
| CN114964663A (en) | Leakage rate detection device and method | |
| CN217483634U (en) | Indicating error and leakproofness integrated multi-station gas meter calibrating device | |
| CN102879037A (en) | Verifying device for gas drainage comprehensive parameter tester | |
| CN203011652U (en) | Automobile water pump assembly sealing test system | |
| CN210626039U (en) | Breather valve capability test system | |
| CN201210104Y (en) | Test apparatus for gas regulator |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 201204 Pudong New Area South Road, Shanghai, No. 1768 Patentee after: Shanghai Aisidake Automotive Air Conditioning Systems Co. Address before: 201204 Pudong New Area South Road, Shanghai, No. 1768 Patentee before: Deerfu Automotive Air-Conditioner System Co., Ltd., Shanghai |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110615 Termination date: 20191029 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |