CN101846574A - Detection method for sealing performance of lamp - Google Patents
Detection method for sealing performance of lamp Download PDFInfo
- Publication number
- CN101846574A CN101846574A CN201010186657A CN201010186657A CN101846574A CN 101846574 A CN101846574 A CN 101846574A CN 201010186657 A CN201010186657 A CN 201010186657A CN 201010186657 A CN201010186657 A CN 201010186657A CN 101846574 A CN101846574 A CN 101846574A
- Authority
- CN
- China
- Prior art keywords
- light fixture
- detection
- lamp
- temperature
- liquid
- Prior art date
Links
- 238000007789 sealing Methods 0.000 title claims abstract description 36
- 238000001514 detection method Methods 0.000 title claims abstract description 22
- 239000007788 liquids Substances 0.000 claims abstract description 25
- 239000011901 water Substances 0.000 claims description 16
- PEDCQBHIVMGVHV-UHFFFAOYSA-N glycerine Chemical compound 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OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims description 14
- 235000011187 glycerol Nutrition 0.000 claims description 14
- 238000009835 boiling Methods 0.000 claims description 7
- 238000004904 shortening Methods 0.000 abstract description 3
- 238000002791 soaking Methods 0.000 abstract description 2
- 239000003570 air Substances 0.000 description 12
- 239000007789 gases Substances 0.000 description 10
- 230000005587 bubbling Effects 0.000 description 6
- 230000000630 rising Effects 0.000 description 3
- 239000000700 tracer Substances 0.000 description 3
- 238000000034 methods Methods 0.000 description 2
- 210000001503 Joints Anatomy 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000875 corresponding Effects 0.000 description 1
- 230000023077 detection of light stimulus Effects 0.000 description 1
- 238000010586 diagrams Methods 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 238000005516 engineering processes Methods 0.000 description 1
- 238000005755 formation reactions Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006011 modification reactions Methods 0.000 description 1
- 230000003000 nontoxic Effects 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- RZVAJINKPMORJF-UHFFFAOYSA-N p-acetaminophenol Chemical compound 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Abstract
Description
Technical field
The invention belongs to the detection method technical field, relate in particular to a kind of detection method of sealing performance of lamp.
Background technology
At present, special lamp all has a plurality of joints on practical set, all can carry out encapsulation process on each joint, to reach the designing requirement of IP degree of protection.Do not reach the light fixture of requirement for sealing, at first will investigate, analyze and find out the concrete position that sealing problem occurs, rectify and improve pointedly the sealing effectiveness of each sealing place.
And the method to the detection of light fixture sealing problem point mainly is to detect by carrying out the test of IP degree of protection in the prior art.The method of IP degree of protection test is that the light fixture sample is sent to mechanism for testing or intra-company laboratory, carries out actual test according to the respective country standard, according to the IP grade of test result checking and affirmation light fixture sample.Progressively dismantle light fixture the test back that finishes, and each sealed engagement place is checked, finally judges whether up to standardly, and analyze to determine concrete sealing problem point.The test result that this detection method obtains is relatively accurate, but it is longer relatively to test required time, and the testing cost height.If the disposable percent of pass of product is held under the not high situation, for example in product development stage, just adopt the method can detect to airtightness of lamps, can increase the cost of product undoubtedly, the cycle of the product development that also can extend simultaneously.
Summary of the invention
The objective of the invention is to overcome above-mentioned the deficiencies in the prior art, a kind of detection method of sealing performance of lamp is provided, its cost is low, be easy to realize, only need a container and some hot water to get final product, and operate simple and easy, fast and effectively, can make quick judgement to the sealing problem point.
Technical scheme of the present invention is: a kind of detection method of sealing performance of lamp, and described detection method comprises:
The light fixture of finishing assembling is soaked in temperature to be higher than in the liquid of room temperature;
Whether observe on the light fixture has bubble to emerge.
Preferably, described light fixture is for to assemble under room temperature.
Preferably, described liquid is the mixed liquor of water or glycerine or glycerine and water.
Preferably, the temperature of described liquid is higher than 20 ℃ to 140 ℃ of room temperatures, and is lower than the boiling point of this liquid.
The detection method of a kind of sealing performance of lamp provided by the invention, whether it is soaked in the liquid that temperature is higher than room temperature by the light fixture that will finish assembling, and observe on the light fixture and have bubble to emerge, and just can tentatively judge the airtightness of lamps energy.The detection cost is low, is easy to realize, only the liquid that needs a container and some temperature to be higher than room temperature get final product, and operates simple and easyly, fast and effective, can make quick judgement by the sealing problem point, helps shortening the cycle of product development.
Description of drawings
Fig. 1 is the process flow diagram of the detection method of a kind of sealing performance of lamp of providing of the embodiment of the invention.
Embodiment
In order to make purpose of the present invention, technical scheme and advantage clearer,, the present invention is further elaborated below in conjunction with drawings and Examples.Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.
As everyone knows,, also claim carat imperial equation of uncle, be expressed as follows according to The Ideal-Gas Equation:
PV＝nRT (1)
In the formula, P represents that gas pressure intensity, unit are handkerchief (Pa); V represents that gas volume, unit are cubic meter (m 3); T represents that absolute temperature, unit are Kelvin (K); N represents that amount of substance, unit are mole (mol); R represents gas law constant, and its value is 8.314 (Pam 3/ Kmol), all gas R value is all identical.
By formula (1) as can be known, for the gas of certain mass, n is constant, if allow the volume V of gas also remain unchanged, then can obtain following Charles's law:
That is: the volume V when gas remains unchanged, the gas of certain mass, and pressure P is directly proportional with its absolute temperature T.Temperature raises, and pressure is also along with increase, and is directly proportional between temperature and the pressure.
According to above-mentioned principle, the detection method of a kind of sealing performance of lamp that the embodiment of the invention provides, described detection method comprises: the light fixture that will at room temperature finish assembling is soaked in temperature and is higher than in the liquid of room temperature; Whether observe on the light fixture has bubble to emerge.Particularly, light fixture comprises housing unit and illuminated component, described housing unit comprises case member and lower case member, fixedly connected and formation inner chamber between described upward case member and the lower case member, described illuminated component is fixedly arranged in the above-mentioned inner chamber, the light fixture that is applied to open air or some special occasions is wanted high requirement to the sealing property of product, thus must test the sealing property of light fixture inner chamber, to improve reliability of products.Can there be air in certain amount in the light fixture of finishing assembling in the chamber within it, when the light fixture that will finish assembling as the operator is soaked in the liquid that is higher than room temperature, the air of light fixture inner chamber will be heated and expand, the air pressure of light fixture inner chamber will raise, if the light fixture inner chamber is poorly sealed, bubble will at first be emerged from bore seal is least severely punished; Whether the operator is qualified by the sealing property of observing each joint on the light fixture and whether having bubble to emerge just can tentatively to judge the light fixture inner chamber; Each joint includes but not limited to: go up between case member and the lower case member, go up the light-emitting window place that offers on the case member, but there are the position that engages in the through hole that the supply lines of offering on the lower case member passes and other, when in light fixture is being higher than the liquid of room temperature, soaking, the bubble if joint is emerged, can conclude that then this light fixture is the underproof product of sealing property, need not that it is continued to deliver to mechanism for testing and detect, can save a large amount of testing costs; When the detection method of the sealing performance of lamp that adopts the embodiment of the invention to provide light fixture is detected find have joint to emit bubble after, represent poorly sealed herein, light fixture can be taken out from liquid, then light fixture is taken apart, reexamine the poorly sealed part of light fixture, and take corresponding measure that this poorly sealed part is rectified and improved, again light fixture is assembled by job instruction, and once more light fixture is soaked in the liquid and detects.As this moment each joint of light fixture do not have bubble and emerge, the operator can assert tentatively that its sealing property is qualified, can or be sent to formal testing agency and further test the packing of product.If each joint of light fixture still has bubble to emerge, then it is disassembled, overhauls and assembles, and detect again by above-mentioned steps, the detection method of a kind of sealing performance of lamp that the embodiment of the invention provides, its cost is low, be easy to realize, only need a container and some hot water to get final product, and operate simple and easy, quick and effective, can make quick judgement by the sealing problem point, help shortening the cycle of product development.According to the relation of temperature and pressure as can be known, temperature is high more, and gas pressure intensity is big more in the light fixture, and bubble is easy emerging more just, and the temperature that therefore improves tracer liquid helps improving the accuracy and the sensing range of testing result.When the tracer liquid of selecting for use is glycerine,,, therefore can select for use the glycerine of higher temperature to detect the airtightness of lamps energy far above the boiling point of water because the boiling point of glycerine reaches 290 ℃.Glycerine can be heated to about 140 ℃, and adopt anchor clamps that light fixture to be measured is immersed in the glycerine, because the temperature contrast between room temperature and the glycerine is bigger, the air of light fixture inner chamber will sharply be heated and rapid expanding, the air pressure rising amplitude of light fixture inner chamber is big and air pressure rising required time is shorter, can in bigger pressure differential range, can detect, can differentiate the sealing property of light fixture under bigger pressure reduction condition airtightness of lamps.If there is the sealing problem point on the light fixture, the bubble just light fixture sealing problem point can in time be emerged has improved detection efficiency when having increased sensing range.
Additionally, according to actual needs, also can select for use the potpourri of G ﹠ W to make tracer liquid, all belong to protection scope of the present invention, glycerine can be water-soluble well, mixes according to the G ﹠ W with different proportion, can obtain the mixed liquor of different boiling.
As shown in Figure 1, the method detailed steps is as follows:
1, at room temperature environment (P 0, T 0) under, general temperature is between 15 ℃-30 ℃, according to assembling work guiding book assembling light fixture, the light fixture inner chamber has been sealed the air of deciding quality up for safekeeping.This moment, the inner chamber air condition was expressed as (P 0, V 0, T 0).
2, prepare the water of suitable capacity, preference temperature T according to the light fixture volume.T generally gets greater than room temperature T 0Get final product.
3, light fixture is immersed in the water that temperature is T, the air of inner chamber is owing to being heated intensification, and pressure increases, and produces certain positive pressure differential with ambient temperature.Examine the speed of the rising that bubbling phenomenon, bubble whether occur.And the light fixture seal point of definite bubbling place correspondence.
4 if the bubbling phenomenon is analyzed and is rectified and improved at the light fixture seal point of bubbling place correspondence, repeats the operation in the 1st step.If there is not the bubbling phenomenon, it is qualified that sealing performance of lamp tentatively is judged as, and can be sent to professional testing agency and carry out actual test.
At analyzing below above the 3rd step work:
Before bubbling, the air quality of inner chamber is constant, and the light fixture cavity volume also remains unchanged, and the inner chamber air is by original state (P 0, V 0, T 0) change to (P, V 0, T),, can get that atmospheric pressure becomes in the chamber according to formula (2) Charles's law:
The positive pressure differential that produces is:
For southern area, room temperature is generally T 0About=the 300K, the boiling point of water is got 373K, and the ultimate value of positive pressure differential is 0.24P 0, i.e. 0.24 atmospheric pressure.
Therefore, can roughly extrapolate the malleation extent of generation by the temperature difference between water and the external environment; Otherwise, understood the value of pressure reduction in the actual environment for use of light fixture, just can instead release the temperature of required preparation water.
Preferably, described liquid is the mixed liquor of water or glycerine or glycerine and water.The temperature of described liquid is higher than 20 ℃ to 140 ℃ of room temperatures.In the present embodiment, adopt hot water that light fixture is detected, and the temperature of hot water is higher 40 ℃ than room temperature, avoids the too high operator of causing of temperature to be scalded.
Additionally, liquid also can adopt other non-corrosiveness, nontoxic, boiling point is higher, the liquid that is easy to get, as glycerine etc., can differentiate the sealing property of light fixture under bigger pressure reduction condition.
The above only is preferred embodiment of the present invention, not in order to restriction the present invention, all any modifications of being done within the spirit and principles in the present invention, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (4)
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| CN201010186657A CN101846574A (en) | 2010-05-28 | 2010-05-28 | Detection method for sealing performance of lamp |
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| CN102121866A (en) * | 2010-12-10 | 2011-07-13 | 东莞勤上光电股份有限公司 | Airtightness test method of lamp |
| CN102486429A (en) * | 2010-12-06 | 2012-06-06 | 海洋王照明科技股份有限公司 | Sealing property detection device |
| CN102608546A (en) * | 2011-01-19 | 2012-07-25 | 广州市熠芯节能服务有限公司 | Dynamic IP (Ingress Protection) testing method for LED (Light-Emitting Diode) illuminating lamp |
| CN103245467A (en) * | 2012-02-07 | 2013-08-14 | 海洋王（东莞）照明科技有限公司 | Detection method for sealing performance of lamp |
| CN104568330A (en) * | 2014-12-20 | 2015-04-29 | 江门市光之典照明有限公司 | Method and device for testing lamp sealing property |
| CN105258864A (en) * | 2015-11-26 | 2016-01-20 | 玉柴联合动力股份有限公司 | Method for detecting sealing of supercharger midbody |
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| CN107525635A (en) * | 2017-07-24 | 2017-12-29 | 佛山市毅丰电器实业有限公司 | A kind of light fixture air-tightness waterproof testing method |
| CN109781363A (en) * | 2018-12-28 | 2019-05-21 | 青岛海尔股份有限公司 | The detection method and detection device of refrigerator leakproofness |
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| CN102486429A (en) * | 2010-12-06 | 2012-06-06 | 海洋王照明科技股份有限公司 | Sealing property detection device |
| CN102486429B (en) * | 2010-12-06 | 2015-03-11 | 海洋王照明科技股份有限公司 | Sealing property detection device |
| CN102121866A (en) * | 2010-12-10 | 2011-07-13 | 东莞勤上光电股份有限公司 | Airtightness test method of lamp |
| CN102608546A (en) * | 2011-01-19 | 2012-07-25 | 广州市熠芯节能服务有限公司 | Dynamic IP (Ingress Protection) testing method for LED (Light-Emitting Diode) illuminating lamp |
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| CN105509976A (en) * | 2014-10-16 | 2016-04-20 | 大陆汽车电子(长春)有限公司 | Leakage test method and device of engine control unit |
| CN104568330A (en) * | 2014-12-20 | 2015-04-29 | 江门市光之典照明有限公司 | Method and device for testing lamp sealing property |
| CN105258864A (en) * | 2015-11-26 | 2016-01-20 | 玉柴联合动力股份有限公司 | Method for detecting sealing of supercharger midbody |
| CN107525635A (en) * | 2017-07-24 | 2017-12-29 | 佛山市毅丰电器实业有限公司 | A kind of light fixture air-tightness waterproof testing method |
| CN109781363A (en) * | 2018-12-28 | 2019-05-21 | 青岛海尔股份有限公司 | The detection method and detection device of refrigerator leakproofness |
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