CN110095237A - A kind of leak hunting method of refrigeration system - Google Patents
A kind of leak hunting method of refrigeration system Download PDFInfo
- Publication number
- CN110095237A CN110095237A CN201910438067.6A CN201910438067A CN110095237A CN 110095237 A CN110095237 A CN 110095237A CN 201910438067 A CN201910438067 A CN 201910438067A CN 110095237 A CN110095237 A CN 110095237A
- Authority
- CN
- China
- Prior art keywords
- pressure
- refrigeration system
- detection
- leak
- vacuum
- 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.)
- Granted
Links
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
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Examining Or Testing Airtightness (AREA)
Abstract
The present invention relates to a kind of detection method of refrigeration system, especially a kind of leak hunting method of refrigeration system, comprising the following steps: refrigeration system is vacuumized；Refrigeration system carries out vacuum pressure maintaining after vacuumizing, be filled with detection nitrogen mixed gas if the pressure qualification after vacuum pressure maintaining, then the pressure after detection inflation, carries out suction gun leak detection if pressure is not less than detection pressure；Air-breathing leak detection is carried out to the leak source for being easy to happen leakage with suction gun, pressure maintaining is entered if detecting qualification and is tested；Pressure after pressure maintaining is unqualified less than if dwell pressure, returns suction gun leak detection process and detects leak source again；Nitrogen hydrogen mixer gas in refrigeration system is discharged and is carried out secondary vacuum pumping after pressure maintaining is qualified, finally injects nitrogen.A kind of leak hunting method of refrigeration system provided by the invention is simple and practical, testing cost is low, safety is good, leak source detection accuracy is high, leak source detection is fast, testing result is accurate and reliable, detection efficiency is high, is applicable in the leak detection detection of various refrigeration systems.
Description
Technical field
The present invention relates to a kind of detection method of refrigeration system, especially a kind of leak hunting method of refrigeration system.
Background technique
With the development of the social economy, refrigeration industry also flourishes.Refrigeration system widely applies to various industries.Together
When, requirement of the country for environmental protection is also higher and higher.The slip that Europe, the U.S. and China allow refrigeration industry also by
Step adds tight.The raising of leakage detecting process is imperative.
Refrigeration system leakage is failure relatively conventional in refrigeration equipment production and operation, once occur not only to will affect to set
Standby normal use, and may also result in the damage of compressor.
Refrigeration system leakage refers to the air-tightness failure of system, causes the refrigerant inside system excessive, extraneous air
Refrigeration system is entered by leakage point with moisture, refrigeration system is caused to can not work normally.It is common in refrigeration system below
Sealing means and the reason of leak:
Welding, crackle, sand holes loosen, and are broken；
It is threadedly coupled, sealing surface oxidation, horn mouth cracking；
Rubber seal, the sealing of various needle-valves, ageing of rubber is damaged, deformation；
Metallic film sealing, solenoid valve, diaphragm breakage；
Packing seal, all kinds of shut-off valves loosen, abrasion；
Existing leak hunting method:
Pressure differential method
It can not examine and be less than 1.0E-2mbarl/s. leakage below；
It can not determine leak source；
Flexible objects, such as plastics, rubber etc. can not have been detected；
Need stable temperature, the available entirely different test result of temperature change；
Required time can be very long, such as tests large cavity workpiece；
Water examines method
Human factor is affected；
It can not examine and be less than 1.0E-3mbarl/s. leakage below
Workpiece dampness may have damage to product or need to dry moisture, waste time；
Soap bubble method
Human factor is affected；
It can not examine and be less than 1.0E-3mbarl/s. leakage below
Workpiece dampness may have damage to product or need to dry；
Big leakage cannot form bubble instead, and bubble is taken away or blown brokenly by air draught；
Even if there is leakage sometimes, bubble will not be formed in the outer surface of some workpiece, such as shiny surface.
Summary of the invention
To solve the above problems, the present invention provides and a kind of is applicable in the high a kind of system of refrigeration system, economically feasible, detection efficiency
The leak hunting method of cooling system, the specific technical proposal is:
A kind of leak hunting method of refrigeration system, comprising the following steps:
S101, it once vacuumizes, refrigeration system is vacuumized；
S102, vacuum pressure maintaining, refrigeration system carry out vacuum pressure maintaining after vacuumizing, the dwell time is 1~5 minute, if vacuum
Pressure after pressure maintaining then enters S103 not less than the first vacuum pressure, if the pressure after vacuum pressure maintaining is less than in the first vacuum pressure
Then carry out vacuum pressure alarm；
S103, detection gas are filled with, nitrogen hydrogen mixeding gas is filled with to refrigeration system, stop filling when reaching detection pressure
Gas；
Pressure after S104, detection inflation, detection refrigeration system is filled with the pressure after nitrogen hydrogen mixeding gas, if pressure is not small
Suction gun leak detection is then carried out in detection pressure, carries out leakage alarm if pressure is less than when detecting pressure；
S105, suction gun leak detection, carry out air-breathing leak detection to the leak source for being easy to happen leakage with suction gun, enter if detecting qualification
Pressure maintaining test；
S106, pressure maintaining test, retain nitrogen hydrogen mixeding gas in refrigeration systems, and the retention time is 8~12 hours, if
Pressure after pressure maintaining is then qualified not less than dwell pressure, and the pressure after pressure maintaining is less than unqualified, return suction gun if dwell pressure
Leak detection process detects leak source again；
The nitrogen hydrogen mixer gas in refrigeration system is discharged by S107, exhaust；
S108, secondary vacuum pumping, vacuumize refrigeration system after exhaust；
S109, injection nitrogen.
Preferably, the vacuum degree vacuumized in the step S101 is 3000Pa, the first vacuum pressure in the step S102
Power is 2500~3000Pa.
Preferably, in the nitrogen hydrogen mixeding gas nitrogen volume ratio be 94.8~95.2%, hydrogen volume ratio be 4.8~
5.2%.
Preferably, the detection pressure in the step S103 is 1.8~2.0Mpa.
Preferably, the detection of refrigerant flow direction is pinned when the suction gun is hunted leak.
Preferably, the vacuum degree vacuumized in the step S108 is 2500~3000Pa.
Preferably, the calculation formula of the dwell pressure in the step S106 are as follows:
In formula
Temperature when t1 is inflation；
T2 is the temperature after pressure maintaining；
P1 the blowing pressure；
P3 is dwell pressure.
Preferably, the range of the P3 is P3 ± 0.05.
It preferably, further include two dimensional code being pasted to workpiece, and scan the two-dimensional code before the step S101；After the step S108
Further include printing qualified label, and contract label is attached on qualified products.
Preferably, the nitrogen hydrogen mixeding gas in refrigeration system is discharged to outdoor in the step S106.
Compared with prior art the invention has the following advantages:
A kind of leak hunting method of refrigeration system provided by the invention is simple and practical, testing cost is low, safety is good, leak source inspection
Survey the leak detection detection that precision is high, leak source detection is fast, testing result is accurate and reliable, detection efficiency is high, is applicable in various refrigeration systems.
Specific embodiment
It is existing that the invention will be further described.
A kind of leak hunting method of refrigeration system, comprising the following steps:
S101, it once vacuumizes, refrigeration system is vacuumized；
S102, vacuum pressure maintaining, refrigeration system carry out vacuum pressure maintaining after vacuumizing, the dwell time is 1~5 minute, if vacuum
Pressure after pressure maintaining then enters S103 not less than the first vacuum pressure, if the pressure after vacuum pressure maintaining is less than in the first vacuum pressure
Then carry out vacuum pressure alarm；
S103, detection gas are filled with, nitrogen hydrogen mixeding gas is filled with to refrigeration system, stop filling when reaching detection pressure
Gas；
Pressure after S104, detection inflation, detection refrigeration system is filled with the pressure after nitrogen hydrogen mixeding gas, if pressure is not small
Suction gun leak detection is then carried out in detection pressure, carries out leakage alarm if pressure is less than when detecting pressure；
S105, suction gun leak detection, carry out air-breathing leak detection to the leak source for being easy to happen leakage with suction gun, enter if detecting qualification
Pressure maintaining test；
S106, pressure maintaining test, retain nitrogen hydrogen mixeding gas in refrigeration systems, and the retention time is 8~12 hours, if
Pressure after pressure maintaining is then qualified not less than dwell pressure, and the pressure after pressure maintaining is less than unqualified, return suction gun if dwell pressure
Leak detection process detects leak source again；
The nitrogen hydrogen mixer gas in refrigeration system is discharged by S107, exhaust；
S108, secondary vacuum pumping, vacuumize refrigeration system after exhaust；
S109, injection nitrogen.
Specifically, further including pasting two dimensional code to workpiece, and scan the two-dimensional code before step S101；It is also wrapped after the step S108
Printing qualified label is included, and contract label is attached on qualified products.
The nitrogen hydrogen mixeding gas in refrigeration system is discharged to outdoor in step S106, prevents from influencing to detect.
The vacuum degree vacuumized in step S101 is 3000Pa, in the step S102 the first vacuum pressure be 2500~
3000Pa。
Nitrogen volume ratio is 94.8~95.2% in the nitrogen hydrogen mixeding gas, and hydrogen volume ratio is 4.8~5.2%.Hydrogen
Hydrogen nitrogen detector can not detect when Gas content is lower than 4.8%, and density of hydrogen is lower, and detection accuracy is lower；Density of hydrogen height has
The risk of explosion, safety are poor.
Detection pressure in step S103 is 1.8~2.0Mpa.
Suction gun pins the detection of refrigerant flow direction when hunting leak.Do not allow to be easy to miss inspection by the detection of refrigerant flow direction.
The vacuum degree vacuumized in step S108 is 2500~3000Pa.
The calculation formula of dwell pressure in step S106 are as follows:
In formula
Temperature when t1 is inflation；
T2 is the temperature after pressure maintaining；
P1 the blowing pressure；
P3 is dwell pressure.
The range of P3 is P3 ± 0.05.
Common P3 value is as shown in Table 1:
| T1 (when inflation temperature, DEG C) | 22 | 30 | 36 | 15 | 10 | 5 |
| T2 (after pressure maintaining 8 hours temperature, DEG C) | 18 | 20 | 30 | 10 | 5 | 10 |
| P1 (the blowing pressure, Mpa) | 2 | 2 | 2 | 2 | 2 | 2 |
| T1=273+t1 | 295 | 303 | 309 | 288 | 283 | 278 |
| T2=273+t2 | 291 | 293 | 303 | 283 | 278 | 283 |
| P1*145+14.7 | 304.7 | 304.7 | 304.7 | 304.7 | 304.7 | 304.7 |
| P3 (pressure after pressure maintaining, Mpa) | 1.97 | 1.93 | 1.96 | 1.96 | 1.96 | 2.04 |
The uncertain factors such as environment temperature, the blowing pressure can be sufficiently avoided to generate testing result by above formula
Influence, to guarantee that testing result is accurate and reliable.
Claims (10)
1. a kind of leak hunting method of refrigeration system, which comprises the following steps:
S101, it once vacuumizes, refrigeration system is vacuumized；
S102, vacuum pressure maintaining, refrigeration system carry out vacuum pressure maintaining after vacuumizing, the dwell time is 1~5 minute, if vacuum pressure maintaining
Pressure afterwards then enters S103 not less than the first vacuum pressure, the pressure after vacuum pressure maintaining less than if in the first vacuum pressure into
The alarm of row vacuum pressure；
S103, detection gas are filled with, nitrogen hydrogen mixeding gas is filled with to refrigeration system, stop inflation when reaching detection pressure；
Pressure after S104, detection inflation, detection refrigeration system is filled with the pressure after nitrogen hydrogen mixeding gas, if pressure is not less than inspection
Measuring pressure then carries out suction gun leak detection, carries out leakage alarm if pressure is less than when detecting pressure；
S105, suction gun leak detection, carry out air-breathing leak detection to the leak source for being easy to happen leakage with suction gun, pressure maintaining are entered if detecting qualification
Test；
S106, pressure maintaining test, retain nitrogen hydrogen mixeding gas in refrigeration systems, and the retention time is 8~12 hours, if pressure maintaining
Pressure afterwards is then qualified not less than dwell pressure, and the pressure after pressure maintaining is less than unqualified, return suction gun leak detection if dwell pressure
Process detects leak source again；
The nitrogen hydrogen mixer gas in refrigeration system is discharged by S107, exhaust；
S108, secondary vacuum pumping, vacuumize refrigeration system after exhaust；
S109, injection nitrogen.
2. a kind of leak hunting method of refrigeration system according to claim 1, which is characterized in that taken out in the step S101 true
Empty vacuum degree is 3000Pa, and the first vacuum pressure is 2500~3000Pa in the step S102.
3. a kind of leak hunting method of refrigeration system according to claim 1, which is characterized in that in the nitrogen hydrogen mixeding gas
Nitrogen volume ratio is 94.8~95.2%, and hydrogen volume ratio is 4.8~5.2%.
4. a kind of leak hunting method of refrigeration system according to claim 1, which is characterized in that the inspection in the step S103
Measuring pressure is 1.8~2.0Mpa.
5. a kind of leak hunting method of refrigeration system according to claim 1, which is characterized in that the suction gun is pinned when hunting leak
The detection of refrigerant flow direction.
6. a kind of leak hunting method of refrigeration system according to claim 1, which is characterized in that taken out in the step S108 true
Empty vacuum degree is 2500~3000Pa.
7. a kind of leak hunting method of refrigeration system according to claim 1, which is characterized in that the guarantor in the step S106
The calculation formula of pressure pressure are as follows:
In formula
Temperature when t1 is inflation；
T2 is the temperature after pressure maintaining；
P1 the blowing pressure；
P3 is dwell pressure.
8. a kind of leak hunting method of refrigeration system according to claim 7, which is characterized in that the range of the P3 be P3 ±
0.05。
9. a kind of leak hunting method of refrigeration system according to claim 1, which is characterized in that also wrapped before the step S101
It includes and two dimensional code is pasted to workpiece, and scan the two-dimensional code；Further include printing qualified label after the step S108, and contract label is pasted
Onto qualified products.
10. a kind of leak hunting method of refrigeration system according to claim 1, which is characterized in that will in the step S106
Nitrogen hydrogen mixeding gas in refrigeration system is discharged to outdoor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910438067.6A CN110095237B (en) | 2019-05-24 | 2019-05-24 | Leakage detection method of refrigerating system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910438067.6A CN110095237B (en) | 2019-05-24 | 2019-05-24 | Leakage detection method of refrigerating system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110095237A true CN110095237A (en) | 2019-08-06 |
| CN110095237B CN110095237B (en) | 2020-10-23 |
Family
ID=67449067
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910438067.6A Active CN110095237B (en) | 2019-05-24 | 2019-05-24 | Leakage detection method of refrigerating system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110095237B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113623907A (en) * | 2021-07-14 | 2021-11-09 | 广州巴兰仕机械有限公司 | Air conditioner refrigerant recovery and charging system and control method thereof |
| CN113639936A (en) * | 2021-08-13 | 2021-11-12 | 深圳市新威尔电子有限公司 | Method for detecting air tightness leakage of square-shell battery cell formation equipment |
| CN114486104A (en) * | 2022-01-26 | 2022-05-13 | 中家院（北京）检测认证有限公司 | System and method for detecting sealing performance of refrigerating device and storage medium |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4320363A1 (en) * | 1993-06-19 | 1994-12-22 | W Von Der Heyde Gmbh Maschinen | Method and device for testing the tightness of hollow bodies |
| DE102006015817A1 (en) * | 2006-04-03 | 2007-10-04 | Peter Speemann | Leakage of e.g. hydrogen nitrogen mixture, detection method, involves absorbing hydrogen nitrogen mixture with environmental air, and continuously measuring concentration of hydrogen in absorbed gas mixture |
| CN101558271A (en) * | 2006-11-06 | 2009-10-14 | 沃尔坎洛克林管接头有限及两合公司 | Leakage test in an air conditioner |
| CN102853975A (en) * | 2012-09-12 | 2013-01-02 | 沈阳北车西屋轨道制动技术有限公司 | Vacuum detection method and device for abraded surface leakage of slide valves of railway brake |
| CN103175662A (en) * | 2013-03-20 | 2013-06-26 | 厦门松芝汽车空调有限公司 | Leak detecting method in production of large and medium-sized automobile air conditioner |
| CN203037419U (en) * | 2012-12-27 | 2013-07-03 | 博益(天津)气动技术研究所有限公司 | Nitrogen and hydrogen leak detection device for air conditioner pipeline tightness detection |
| CN203037418U (en) * | 2012-12-27 | 2013-07-03 | 博益(天津)气动技术研究所有限公司 | Suction type multichannel nitrogen hydrogen leak detection device |
| CN203422198U (en) * | 2013-09-11 | 2014-02-05 | 博益(天津)气动技术研究所有限公司 | Rapid leak detection apparatus of nitrogen and hydrogen leak detector |
| CN104062083A (en) * | 2014-06-20 | 2014-09-24 | 珠海格力电器股份有限公司 | Air conditioner leakage detecting system and leakage detecting method thereof |
| CN106052978A (en) * | 2016-08-20 | 2016-10-26 | 厦门建霖工业有限公司 | Pressure vessel air tightness detection device and method |
-
2019
- 2019-05-24 CN CN201910438067.6A patent/CN110095237B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4320363A1 (en) * | 1993-06-19 | 1994-12-22 | W Von Der Heyde Gmbh Maschinen | Method and device for testing the tightness of hollow bodies |
| DE102006015817A1 (en) * | 2006-04-03 | 2007-10-04 | Peter Speemann | Leakage of e.g. hydrogen nitrogen mixture, detection method, involves absorbing hydrogen nitrogen mixture with environmental air, and continuously measuring concentration of hydrogen in absorbed gas mixture |
| CN101558271A (en) * | 2006-11-06 | 2009-10-14 | 沃尔坎洛克林管接头有限及两合公司 | Leakage test in an air conditioner |
| CN102853975A (en) * | 2012-09-12 | 2013-01-02 | 沈阳北车西屋轨道制动技术有限公司 | Vacuum detection method and device for abraded surface leakage of slide valves of railway brake |
| CN203037419U (en) * | 2012-12-27 | 2013-07-03 | 博益(天津)气动技术研究所有限公司 | Nitrogen and hydrogen leak detection device for air conditioner pipeline tightness detection |
| CN203037418U (en) * | 2012-12-27 | 2013-07-03 | 博益(天津)气动技术研究所有限公司 | Suction type multichannel nitrogen hydrogen leak detection device |
| CN103175662A (en) * | 2013-03-20 | 2013-06-26 | 厦门松芝汽车空调有限公司 | Leak detecting method in production of large and medium-sized automobile air conditioner |
| CN203422198U (en) * | 2013-09-11 | 2014-02-05 | 博益(天津)气动技术研究所有限公司 | Rapid leak detection apparatus of nitrogen and hydrogen leak detector |
| CN104062083A (en) * | 2014-06-20 | 2014-09-24 | 珠海格力电器股份有限公司 | Air conditioner leakage detecting system and leakage detecting method thereof |
| CN106052978A (en) * | 2016-08-20 | 2016-10-26 | 厦门建霖工业有限公司 | Pressure vessel air tightness detection device and method |
Non-Patent Citations (1)
| Title |
|---|
| 范茂兴: "《家用电器测试技术》", 30 June 2000 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113623907A (en) * | 2021-07-14 | 2021-11-09 | 广州巴兰仕机械有限公司 | Air conditioner refrigerant recovery and charging system and control method thereof |
| WO2023284095A1 (en) * | 2021-07-14 | 2023-01-19 | 广州巴兰仕机械有限公司 | Air conditioning refrigerant recovery and charging system and control method therefor |
| CN113639936A (en) * | 2021-08-13 | 2021-11-12 | 深圳市新威尔电子有限公司 | Method for detecting air tightness leakage of square-shell battery cell formation equipment |
| CN114486104A (en) * | 2022-01-26 | 2022-05-13 | 中家院（北京）检测认证有限公司 | System and method for detecting sealing performance of refrigerating device and storage medium |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110095237B (en) | 2020-10-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110095237A (en) | A kind of leak hunting method of refrigeration system | |
| CN201075051Y (en) | Apparatus for detecting leakage of sealing article | |
| US9810600B2 (en) | Method for detecting a leak on a non-rigid test specimen | |
| US10073001B2 (en) | Leak test arrangement and leak test method | |
| CN102269641B (en) | Soft package article device for detecting sealability and detection method | |
| CN100578176C (en) | Detecting method for flexible packing products air tightness | |
| CN205826241U (en) | Air-tightness detection device | |
| JP2011179975A (en) | Device and method for inspecting leakage | |
| CN104568336A (en) | Helium mass spectrometer leak detection method for sealing workpiece | |
| CN110608860A (en) | Method for detecting air tightness of soft package battery | |
| CN204177537U (en) | A kind of container helium mass spectrum leak detection device | |
| CN104236826A (en) | Bagged product tightness detection device and method | |
| CN109556809B (en) | Nondestructive leak detection method and device based on differential pressure principle | |
| JP2008309698A (en) | Airtightness inspection device, airtightness inspection method and method for manufacturing airtight product | |
| CN205538126U (en) | Electronic device shell integrality detection device | |
| CN104697726A (en) | Workpiece leakage detection device | |
| CN220322645U (en) | Tightness test system | |
| CN210036906U (en) | Negative pressure source device and gas meter verification gas circuit system | |
| CN105738037A (en) | Plasma reaction cavity seepage detection method | |
| CN214277332U (en) | Leak detection device for pressure-bearing equipment | |
| CN214893929U (en) | Oil tank leakage detection device | |
| CN210487193U (en) | Device for detecting air leakage in target piece production process | |
| CN210005185U (en) | Sealing performance testing system of tidal current energy generator set | |
| US11359748B2 (en) | Connection system between a distribution member and a receiving member and leak detection method | |
| CN111579169A (en) | Carbon tank ventilation electromagnetic valve leakage detection system and detection method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |