CN102455243A - Leakage detection method for air-conditioning system - Google Patents
Leakage detection method for air-conditioning system Download PDFInfo
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- CN102455243A CN102455243A CN2010105158526A CN201010515852A CN102455243A CN 102455243 A CN102455243 A CN 102455243A CN 2010105158526 A CN2010105158526 A CN 2010105158526A CN 201010515852 A CN201010515852 A CN 201010515852A CN 102455243 A CN102455243 A CN 102455243A
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Abstract
The invention discloses a leakage detection method for an air-conditioning system. The method comprises the following steps of: A, vacuumizing the air-conditioning system; B, opening a filling valve, filling inert gas and a refrigerant into the air-conditioning system, and making pressure in the air-conditioning system more than 0.6 MPa; and C, closing the filling valve, detecting leakage of the air-conditioning system by using a leakage detection instrument. By the method, the cost of leakage detection can be reduced effectively, and the pollution to the environment can be reduced.
Description
Technical field
The invention belongs to field of air conditioning, be specifically related to a kind of air-conditioning system leak hunting method.
Background technology
All air-conditioning systems all must be carried out the pressure leak test in process of production; The purpose of leak detection mainly is the pipeline of inspection air-conditioning system and the sealing situation of accessory (like four-way valve, square body valve, solenoid valve, gas-liquid separator etc.) thereof; With the assurance system in normal operation, do not break and leak.
Traditional leak hunting method generally adopts single cold-producing medium of planting that sealing system is hunted leak; Do not mix and hunt leak with other gases; In order to guarantee the quality of product; Search gas must reach certain pressure in internal system, and process need consumes more cold-producing medium thereby the shortcoming of this kind leak hunting method is to hunt leak has increased production cost of products, and the used cold-producing medium of hunting leak simultaneously is dispersed in the atmosphere and also environment is polluted.
Summary of the invention
The objective of the invention is to overcome the defective of prior art, a kind of air-conditioning system leak hunting method is provided, the present invention can effectively reduce the cost of leak detection, alleviates the pollution that environment is caused.
Its technical scheme is following.
A kind of air-conditioning system leak hunting method, this method comprises the steps: A, air-conditioning system is vacuumized processing; B, open filling valve, perfusion inert gas and cold-producing medium in air-conditioning system, and make the air-conditioning system pressure inside greater than 0.6 MPa; C, tighten filling valve, and start the operation air-conditioning system, air-conditioning system is hunted leak through leakage detecting instrument.
The technical scheme of the further refinement of aforementioned techniques scheme can be.
In said A step, need vacuumize processing at the high pressure valve and the low pressure valve place of air-conditioning system through evacuator.
In said A step, when said vacuum tightness is lower than 25 handkerchiefs, stop vacuum pumping, and get into said B procedure.
Before said B step, need open the operation valve of air-conditioning system earlier, and guarantee that cold-producing medium can arrive the individual channel of air-conditioning system, also needs at fluorinfused nozzle place attaching tensimeter.
In said C step, the leakage detecting instrument that is adopted is a halogen leak detector.
In said B step, earlier the perfusion cold-producing medium is inner and its internal pressure is reached or be higher than 0.3 MPa to air-conditioning system, pours into inert gas again to air-conditioning system inside and its internal pressure is reached or be higher than 0.6 MPa.
In said B step, in the mixed gas that said inert gas and cold-producing medium form, the mole ratio of inert gas and cold-producing medium is less than 1:1.
In sum, advantage of the present invention is following.
1, in the leak detection process,, under the situation of the pressure that guarantees mixed gas,, reduced the cost of air-conditioning system leak detection owing to adopt inert gas to substitute the part cold-producing medium by importing air-conditioning system after inert gas and the refrigerant mixed.
2, owing to adopt inert gas to substitute the cold-producing medium of part, alleviated cold-producing medium, reduced pollution environment to atmospheric destruction.
Embodiment
Below in conjunction with accompanying drawing embodiments of the invention are elaborated.
A kind of air-conditioning system leak hunting method, this method comprises the steps: A, air-conditioning system is vacuumized processing; B, open filling valve, perfusion inert gas and cold-producing medium in air-conditioning system, and make the air-conditioning system pressure inside greater than 0.6 MPa; C, close filling valve, air-conditioning system is hunted leak through leakage detecting instrument.
Describe in the face of its detailed step down.
1, opens the operation valve of air-conditioning system earlier, and guarantee that cold-producing medium and inert gas can arrive the individual channel of air-conditioning system.
2, at fluorinfused nozzle place attaching tensimeter.
3, at the high pressure valve and the low pressure valve place of air-conditioning system air-conditioning system is vacuumized processing through evacuator.
4, when vacuum tightness is lower than 25 handkerchiefs, stop vacuum pumping.
5, when perfusion; In the mixed gas that said inert gas and cold-producing medium form; The mol ratio of inert gas and cold-producing medium in the actual filling process, is controlled the ratio of the molal quantity of mixed gas through measuring injection pressure less than 1:1; That is: earlier the perfusion cold-producing medium is inner and make its internal pressure reach 0.3 MPa to air-conditioning system, pours into inert gas again to air-conditioning system inside and its internal pressure is reached or be higher than 0.6 MPa.
6, perfusion finishes, and valve-off takes off Filling gun.
7, calibration leakage detecting instrument (like halogen leak detector) is to corresponding leak detection gear, and calibration with the leak rate in 1 gram/year as examining on schedule.
8, to calibrate qualified leakage detecting instrument each solder joint, pipeline, elbow, U pipe, heat exchanger, joint and the valve etc. of air-conditioning system are located to hunt leak, when leakage detecting instrument is reported to the police, be regarded as air-conditioning system and leak, otherwise the air-conditioning system leak detection is qualified.
In sum, present embodiment has following advantage.
1, in the leak detection process,, under the situation of the pressure that guarantees mixed gas,, reduced the cost of air-conditioning system leak detection owing to adopt inert gas to substitute the part cold-producing medium by importing air-conditioning system after inert gas and the refrigerant mixed.
2, owing to adopt inert gas to substitute the cold-producing medium of part, alleviated cold-producing medium, reduced pollution environment to atmospheric destruction.
More than be merely specific embodiment of the present invention, do not limit protection scope of the present invention with this; Any replacement and the improvement on the basis of not violating the present invention's design, done all belong to protection scope of the present invention.
Claims (7)
1. an air-conditioning system leak hunting method is characterized in that, this method comprises the steps: A, air-conditioning system is vacuumized processing; B, open filling valve, perfusion cold-producing medium and inert gas in air-conditioning system, and make the air-conditioning system pressure inside greater than 0.6 MPa; C, close filling valve, air-conditioning system is hunted leak through leakage detecting instrument.
2. air-conditioning system leak hunting method according to claim 1 is characterized in that, in said A step, need vacuumize processing at the high pressure valve and the low pressure valve place of air-conditioning system through evacuator.
3. air-conditioning system leak hunting method according to claim 1 is characterized in that, in said A step, when said vacuum tightness is lower than 25 handkerchiefs, stops vacuum pumping, and gets into said B procedure.
4. air-conditioning system leak hunting method according to claim 1; It is characterized in that, before said B step, need open the operation valve of air-conditioning system earlier; Guarantee the inert gas of perfusion and the individual channel that cold-producing medium can arrive air-conditioning system, also need at fluorinfused nozzle place attaching tensimeter.
5. air-conditioning system leak hunting method according to claim 1 is characterized in that in said C step, the leakage detecting instrument that is adopted is a halogen leak detector.
6. like each said air-conditioning system leak hunting method in the claim 1 to 5; It is characterized in that; In said B step; Earlier the perfusion cold-producing medium is inner and its internal pressure is reached or be higher than 0.3 MPa to air-conditioning system, pours into inert gas again to air-conditioning system inside and its internal pressure is reached or be higher than 0.6 MPa.
7. like each said air-conditioning system leak hunting method in the claim 1 to 5, it is characterized in that in said B step, in the mixed gas that said inert gas and cold-producing medium form, the mole ratio of inert gas and cold-producing medium is less than 1:1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010515852 CN102455243B (en) | 2010-10-22 | 2010-10-22 | Leakage detection method for air-conditioning system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010515852 CN102455243B (en) | 2010-10-22 | 2010-10-22 | Leakage detection method for air-conditioning system |
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| CN102455243A true CN102455243A (en) | 2012-05-16 |
| CN102455243B CN102455243B (en) | 2013-12-25 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102692302A (en) * | 2012-06-05 | 2012-09-26 | 唐山轨道客车有限责任公司 | Method for detecting air conditioner of cab of high-speed train |
| CN104260941A (en) * | 2014-08-14 | 2015-01-07 | 合肥通用机械研究院 | Automatic leakage detection system for finished household air conditioner |
| CN104296945A (en) * | 2013-07-15 | 2015-01-21 | 珠海格力电器股份有限公司 | Evaporator leak detection system and leak detection method |
| CN106370362A (en) * | 2016-08-24 | 2017-02-01 | 上海申克机械有限公司 | Entire vehicle braking system detection method and apparatus |
| CN108398214A (en) * | 2018-01-31 | 2018-08-14 | 宁波保税区瑞丰模具科技有限公司 | A kind of leakage detection apparatus containing compressor apparatus |
| CN110274730A (en) * | 2019-07-02 | 2019-09-24 | 浙江国祥股份有限公司 | A kind of air-conditioning air tight test device |
| CN110319985A (en) * | 2018-03-29 | 2019-10-11 | 长城汽车股份有限公司 | A kind of detection system and detection method |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110749396A (en) * | 2019-11-21 | 2020-02-04 | 格力电器（武汉）有限公司 | Air conditioner leakage detection process monitoring method and device and air conditioner leakage detection system |
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| CN1415946A (en) * | 2002-09-11 | 2003-05-07 | 柯瑞敏 | Leakage detection method for whole machine pipeline system |
| 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 |
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| CN1415946A (en) * | 2002-09-11 | 2003-05-07 | 柯瑞敏 | Leakage detection method for whole machine pipeline system |
| 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 |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102692302A (en) * | 2012-06-05 | 2012-09-26 | 唐山轨道客车有限责任公司 | Method for detecting air conditioner of cab of high-speed train |
| CN104296945A (en) * | 2013-07-15 | 2015-01-21 | 珠海格力电器股份有限公司 | Evaporator leak detection system and leak detection method |
| CN104260941A (en) * | 2014-08-14 | 2015-01-07 | 合肥通用机械研究院 | Automatic leakage detection system for finished household air conditioner |
| CN104260941B (en) * | 2014-08-14 | 2016-04-06 | 合肥通用机械研究院 | Automatic leakage detection system for finished household air conditioner |
| CN106370362A (en) * | 2016-08-24 | 2017-02-01 | 上海申克机械有限公司 | Entire vehicle braking system detection method and apparatus |
| CN108398214A (en) * | 2018-01-31 | 2018-08-14 | 宁波保税区瑞丰模具科技有限公司 | A kind of leakage detection apparatus containing compressor apparatus |
| CN110319985A (en) * | 2018-03-29 | 2019-10-11 | 长城汽车股份有限公司 | A kind of detection system and detection method |
| CN110319985B (en) * | 2018-03-29 | 2021-01-12 | 长城汽车股份有限公司 | Detection system and detection method |
| CN110274730A (en) * | 2019-07-02 | 2019-09-24 | 浙江国祥股份有限公司 | A kind of air-conditioning air tight test device |
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| Publication number | Publication date |
|---|---|
| CN102455243B (en) | 2013-12-25 |
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