CN101363792B - Reliability experiment method for anti-corrosive steel tube of air conditioner - Google Patents
Reliability experiment method for anti-corrosive steel tube of air conditioner Download PDFInfo
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- 238000012360 testing method Methods 0.000 claims abstract description 192
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- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 10
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 9
- 230000002378 acidificating effect Effects 0.000 claims description 9
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 9
- 229910052782 aluminium Inorganic materials 0.000 claims description 9
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- 239000000853 adhesive Substances 0.000 claims description 7
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- 239000011780 sodium chloride Substances 0.000 claims description 5
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- 230000007774 longterm Effects 0.000 description 7
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 4
- 229910052802 copper Inorganic materials 0.000 description 4
- 239000010949 copper Substances 0.000 description 4
- 239000007788 liquid Substances 0.000 description 3
- 238000003860 storage Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 2
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Abstract
Description
技术领域technical field
本发明涉及空调器防腐钢管的可靠性试验方法。The invention relates to a reliability test method for an anticorrosion steel pipe of an air conditioner.
背景技术Background technique
家用空调器的管路，基本都是铜管，铜管具有传热性好，焊接性好，耐腐蚀性好，但存在以下缺点：1、价格日益高涨，导致空调生产成本高，使空调产品在市场的竟争力降低；2、中国铜资源缺乏，而铁矿资源丰富，因此钢管的价格较便宜。若家用空调器室外机的压缩机出口与四通阀体相接采用一段防腐钢管，压缩机的储液罐与四通阀体相连接也采用一段钢管，则不影响产品的换热效率，也不需要更改原产品的设计。为了保证钢管的使用寿命，需要考虑空调工作环境对钢管焊接可靠性、防腐层的破坏程度，即长期振动、长期高温、长期高湿、长期低温、冷热交替、阳光辐照、长期凝水、酸碱性环境、盐雾等综合因素的影响。如何用加速模拟试验方法评估钢管的使用寿命是否满足空调设计的使用寿命，在现有技术中的测试方法的结果与实际使用效果存在较大的误差，无法真实地评估出产品的使用寿命。The pipelines of household air conditioners are basically copper pipes. Copper pipes have good heat transfer, good weldability, and good corrosion resistance, but they have the following disadvantages: 1. The price is rising day by day, which leads to high production costs of air conditioners and makes air conditioner products The competitiveness in the market is reduced; 2. China is short of copper resources, but rich in iron ore resources, so the price of steel pipes is relatively cheap. If a piece of anti-corrosion steel pipe is used to connect the compressor outlet of the outdoor unit of the household air conditioner to the four-way valve body, and a piece of steel pipe is also used to connect the liquid storage tank of the compressor to the four-way valve body, the heat exchange efficiency of the product will not be affected, and the heat exchange efficiency of the product will not be affected. No need to change the design of the original product. In order to ensure the service life of the steel pipe, it is necessary to consider the degree of damage to the welding reliability and anti-corrosion layer of the steel pipe by the air-conditioning working environment, that is, long-term vibration, long-term high temperature, long-term high humidity, long-term low temperature, alternating heat and cold, sunlight, long-term condensation, Affected by comprehensive factors such as acid-base environment and salt spray. How to use the accelerated simulation test method to evaluate whether the service life of the steel pipe meets the design service life of the air conditioner? There is a large error between the results of the test method in the prior art and the actual use effect, and it is impossible to truly evaluate the service life of the product.
发明内容Contents of the invention
针对现有技术中的难题，本发明提供一种试验结果与实际使用结果更为相符、且更为真实地评估出钢管使用寿命的空调器防腐钢管的可靠性试验方法。Aiming at the problems in the prior art, the present invention provides a reliability test method for the anti-corrosion steel pipe of an air conditioner whose test results are more consistent with the actual use results and can more realistically evaluate the service life of the steel pipes.
为实现上述目的，本发明的技术方案为：一种空调器防腐钢管的可靠性试验方法，其包括防腐钢管焊接及强度试验、酸性环境试验、碱性环境试验、热重分析试验、氧化诱导期试验及加速循环试验，该加速循环试验包括以下步骤：In order to achieve the above object, the technical solution of the present invention is: a reliability test method of anti-corrosion steel pipe for air conditioner, which includes anti-corrosion steel pipe welding and strength test, acidic environment test, alkaline environment test, thermogravimetric analysis test, oxidation induction period Test and accelerated cycle test, the accelerated cycle test includes the following steps:
(1)将防腐钢管进行高温加速试验，试验时间为A1，并进行附着力测试，若防腐层不脱落则合格并进行下一步骤，否则试验停止；(2)将防腐钢管进行光老化加速试验，试验时间为A2，并进行变色等级、失光等级及粉化等级的判定，若符合判定要求则合格并进行下一步骤，否则试验停止；(3)将防腐钢管进行高、低温循环试验，试验时间为A3，并进行附着力测试，若防腐层不脱落则合格并进行下一步骤，否则试验停止；(4)将防腐钢管进行冷凝水加速试验，试验时间为A4，并进行附着力测试，若防腐层不脱落则合格并进行下一步骤，否则试验停止；(5)将防腐钢管进行中性盐雾腐蚀试验，试验时间为A5，并进行附着力测试，若防腐层不脱落则合格并返回步骤(1)，共进行B个循环，否则试验停止。(1) Conduct the high temperature accelerated test on the anti-corrosion steel pipe, the test time is A1, and carry out the adhesion test, if the anti-corrosion layer does not fall off, it is qualified and proceed to the next step, otherwise the test is stopped; (2) The anti-corrosion steel pipe is subjected to the light aging accelerated test , the test time is A2, and the judgment of discoloration grade, gloss loss grade and pulverization grade is carried out. If it meets the judgment requirements, it is qualified and proceeds to the next step, otherwise the test is stopped; The test time is A3, and the adhesion test is carried out. If the anti-corrosion layer does not fall off, it is qualified and the next step is carried out, otherwise the test is stopped; (4) The anti-corrosion steel pipe is subjected to the condensate water acceleration test, the test time is A4, and the adhesion test is carried out , if the anti-corrosion layer does not fall off, it is qualified and proceed to the next step, otherwise the test is stopped; (5) The anti-corrosion steel pipe is subjected to a neutral salt spray corrosion test, the test time is A5, and an adhesion test is carried out. If the anti-corrosion layer does not fall off, it is qualified And return to step (1) for a total of B cycles, otherwise the test stops.
在步骤(1)中，防腐钢管置于温度80～130℃的鼓风式加热箱中进行高温加速试验，时间A1为10～40小时。In step (1), the anti-corrosion steel pipe is placed in a blast-type heating box at a temperature of 80-130° C. to perform a high-temperature accelerated test, and the time A1 is 10-40 hours.
在步骤(2)中，防腐钢管置于光老化试验箱中进行光老化试验，在UVB-313nm，温度60±1℃下，辐照4小时，在温度50±1℃下，凝露4小时，时间A2为20～60小时。In step (2), the anti-corrosion steel pipe is placed in a light aging test box for light aging test, irradiated for 4 hours at UVB-313nm at a temperature of 60±1°C, and condensed for 4 hours at a temperature of 50±1°C , time A2 is 20-60 hours.
在步骤(3)中，防腐钢管置于高低温试验箱中进行高、低温循环试验，试验条件为：高温大于80℃，试验1小时，低温小于-20℃，试验1小时，时间A3为5～20小时。In step (3), the anti-corrosion steel pipe is placed in a high and low temperature test box for high and low temperature cycle tests. The test conditions are: high temperature greater than 80°C, test for 1 hour, low temperature less than -20°C, test for 1 hour, time A3 is 5 ~20 hours.
在步骤(4)中，防腐钢管置于沸腾状态的蒸溜水中进行冷凝水加速试验，时间A4为10～30小时。In step (4), the anti-corrosion steel pipe is placed in boiling distilled water to carry out the condensed water accelerated test, and the time A4 is 10-30 hours.
在步骤(5)中，防腐钢管置于盐雾试验箱中进行中性盐雾腐蚀试验，试验条件为：氯化钠浓度为5％，温度为35±2℃，PH＝6.7～7.2，氯化钠溶液雾状沉降量为1～2ml/80cm·h，时间A5为40～170小时。In step (5), the anti-corrosion steel pipe is placed in a salt spray test chamber for a neutral salt spray corrosion test. The nebulized sedimentation amount of the sodium chloride solution is 1-2ml/80cm·h, and the time A5 is 40-170 hours.
在步骤(5)中，该加速循环试验的循环次数B为3～10次。In step (5), the number of cycles B of the accelerated cycle test is 3 to 10 times.
该防腐钢管焊接及强度试验为将冷凝器密封，在温度10～30℃下空调器运行制冷，运行时间为300～1000小时，试验后若防腐钢管不发生泄漏则合格，否则不合格；The welding and strength test of the anti-corrosion steel pipe is to seal the condenser and run the air conditioner for cooling at a temperature of 10-30°C for 300-1000 hours. After the test, if the anti-corrosion steel pipe does not leak, it is qualified, otherwise it is unqualified;
酸性环境试验为将防腐钢管浸到浓度为3％的HCl中进行试验，温度25±2℃，共进行150～400小时，试验后对防腐钢管进行附着力测试，若防腐层不脱落则合格，否则不合格；The acidic environment test is to immerse the anti-corrosion steel pipe in HCl with a concentration of 3%. Otherwise unqualified;
碱性环境试验为将防腐钢管置于浓度为5％的NaOH中进行试验，温度25±2℃，共进行100～240小时，试验后对防腐钢管进行附着力测试，若防腐层不脱落则合格，否则不合格；The alkaline environment test is to place the anti-corrosion steel pipe in NaOH with a concentration of 5% for the test at a temperature of 25±2°C for a total of 100-240 hours. After the test, the anti-corrosion steel pipe is tested for adhesion. If the anti-corrosion layer does not fall off, it is qualified , otherwise unqualified;
热重分析试验为将防腐钢管的防腐层刮下，置于热重分析仪中进行试验，测定防腐层的分解温度，若防腐层的分解温度大于80℃则合格，若分解温度小于或等于80℃则不合格；The thermogravimetric analysis test is to scrape off the anti-corrosion layer of the anti-corrosion steel pipe, put it in a thermogravimetric analyzer for testing, and measure the decomposition temperature of the anti-corrosion layer. If the decomposition temperature of the anti-corrosion layer is greater than 80 ° C, it is qualified; ℃ is unqualified;
氧化诱导期试验为将防腐钢管的防腐层刮下，置于差示热分析仪中进行试验，测定防腐层的氧化诱导期温度，若氧化诱导期温度大于80℃则合格，若氧化诱导期温度小于或等于80℃则不合格。The oxidation induction period test is to scrape off the anticorrosion layer of the anticorrosion steel pipe, put it in a differential thermal analyzer for testing, and measure the oxidation induction period temperature of the anticorrosion layer. If the oxidation induction period temperature is greater than 80 ° C, it is qualified. If the oxidation induction period temperature Less than or equal to 80 ℃ is unqualified.
所述附着力测试为将胶粘铝箔或透明胶带粘贴于钢管的防腐层表面，压紧，然后再用180°的剥离力撕掉胶粘铝箔或透明胶带，观察管表面是否有防腐层脱落，或者胶粘铝箔或透明胶带上是否有防腐层残留。The adhesion test is to paste the adhesive aluminum foil or transparent tape on the surface of the anti-corrosion layer of the steel pipe, press it tightly, and then tear off the adhesive aluminum foil or transparent tape with a peeling force of 180°, and observe whether the anti-corrosion layer falls off on the surface of the pipe. Or whether there is any anti-corrosion layer left on the glued aluminum foil or scotch tape.
与现有技术相比，本发明具有以下优点：Compared with the prior art, the present invention has the following advantages:
本发明通过防腐钢管焊接可靠性试验、酸性环境试验、碱性环境试验、热重分析试验、及加速循环试验对钢管的防腐层进行测试，综合考虑了外界环境对防腐钢管长期处于高温或冷凝水状态下的振动、冷热交替、阳光辐照、酸性环境、碱性环境、盐雾等因素的影响，使得测试结果与真实结果更为符合，能更准确地测出防腐钢管的使用寿命。The present invention tests the anticorrosion layer of the steel pipe through the welding reliability test of the anticorrosion steel pipe, the acidic environment test, the alkaline environment test, the thermogravimetric analysis test, and the accelerated cycle test. Influenced by factors such as vibration, cold and heat alternation, sunlight irradiation, acidic environment, alkaline environment, salt spray and other factors in the state, the test results are more consistent with the real results, and the service life of the anti-corrosion steel pipe can be measured more accurately.
另外，各个试验过程可分别进行，也可同时单独进行，同时单独进行时最多只需3200小时即可完成试验，试验时间较短，大大提高了试验效率。In addition, each test process can be carried out separately or at the same time, and it only takes 3200 hours to complete the test at the same time, and the test time is short, which greatly improves the test efficiency.
附图说明Description of drawings
图1为加速循环试验的流程图。Figure 1 is a flowchart of the accelerated cycle test.
具体实施方式Detailed ways
下面结合附图对本发明作进一步的详细说明。The present invention will be further described in detail below in conjunction with the accompanying drawings.
本发明的空调器防腐钢管的可靠性试验方法，其包括以下试验内容a～f：The reliability test method of the air conditioner anticorrosion steel pipe of the present invention, it comprises following test content a～f:
a、该防腐钢管焊接及强度试验：a. Welding and strength test of the anti-corrosion steel pipe:
本发明的可靠性试验方法中的防腐钢管指的是空调器室外机的压缩机出口与四通阀体相接的柔性防腐钢管，压缩机的储液罐与四通阀相连接的柔性防腐钢管，四通阀与三通阀体连接的柔性防腐钢管，将冷凝器采用塑料薄膜完全密封，在温度10～30℃的试验室内空调器运行制冷，运行时间为300～1000小时；The anti-corrosion steel pipe in the reliability test method of the present invention refers to the flexible anti-corrosion steel pipe in which the compressor outlet of the outdoor unit of the air conditioner is connected to the four-way valve body, and the flexible anti-corrosion steel pipe in which the liquid storage tank of the compressor is connected to the four-way valve , the flexible anti-corrosion steel pipe connected between the four-way valve and the three-way valve body, the condenser is completely sealed with a plastic film, and the air conditioner operates in a test room with a temperature of 10-30 ° C for cooling, and the operating time is 300-1000 hours;
试验结果判定：试验结束后，防腐钢管1、2、3不发生任何泄漏、与柔性防腐钢管相接的铜管未裂漏，则合格，否则不合格。Judgment of the test results: After the test, if the anti-corrosion steel pipes 1, 2, and 3 do not leak, and the copper pipes connected to the flexible anti-corrosion steel pipes do not leak, then it is qualified, otherwise it is unqualified.
b、酸性环境试验方法：b. Acidic environment test method:
将防腐钢管浸到浓度为3％的HCl中进行试验，在温度25±2℃下共进行150～400小时。完毕，将防腐钢管进行附着力测试。Immerse the anti-corrosion steel pipe in 3% HCl for a test at a temperature of 25±2°C for a total of 150 to 400 hours. After completion, the anti-corrosion steel pipe is tested for adhesion.
试验结果判定：防腐层不脱落，则合格，否则不合格。Judgment of test results: if the anti-corrosion layer does not fall off, it is qualified, otherwise it is unqualified.
c、碱性环境试验：c. Alkaline environment test:
将防腐钢管置于浓度为5％的NaOH中进行试验，在温度25±2℃下，共进行100～240小时。完毕，进行附着力测试。Put the anti-corrosion steel pipe in NaOH with a concentration of 5% to carry out the test at a temperature of 25±2°C for a total of 100 to 240 hours. When finished, perform an adhesion test.
试验结果判定：防腐层不脱落，则合格。Judgment of test results: if the anti-corrosion layer does not fall off, it is qualified.
d、热重分析试验：d. Thermogravimetric analysis test:
将防腐钢管的防腐层刮下，置于热重分析仪中进行试验，测定防腐层的分解温度。Scrape off the anti-corrosion layer of the anti-corrosion steel pipe, put it in a thermogravimetric analyzer for testing, and measure the decomposition temperature of the anti-corrosion layer.
试验结果判定：若防腐层的分解温度大于80℃则合格，若分解温度小于或等于80℃则不合格。Judgment of test results: If the decomposition temperature of the anti-corrosion layer is greater than 80°C, it is qualified; if the decomposition temperature is less than or equal to 80°C, it is unqualified.
e、氧化诱导期试验：e. Oxidation induction period test:
将防腐钢管的防腐层刮下，置于差示热分析仪中进行试验，测定防腐层的氧化诱导期温度。Scrape off the anti-corrosion layer of the anti-corrosion steel pipe, put it in a differential thermal analyzer for testing, and measure the oxidation induction temperature of the anti-corrosion layer.
试验结果：若氧化诱导期温度大于80℃则合格，若氧化诱导期温度小于或等于80℃则不合格。Test results: If the oxidation induction temperature is greater than 80°C, it is qualified; if the oxidation induction temperature is less than or equal to 80°C, it is unqualified.
f、加速循环试验：f. Accelerated cycle test:
该加速循环试验包括如下步骤：如图1所示，This accelerated cycle test comprises the steps: as shown in Figure 1,
为了试验更准确且易于测量，该加速循环试验采用与防腐钢管相同的工艺，制成试验平板，规格为：100mm×150mm。In order to make the test more accurate and easy to measure, the accelerated cycle test adopts the same process as the anti-corrosion steel pipe to make a test plate with a specification of 100mm×150mm.
(1)将防腐钢管进行高温加速试验，试验时间为A1，并进行附着力测试，若防腐层不脱落则合格并进行下一步骤，否则试验停止；(1) Conduct the high temperature accelerated test on the anti-corrosion steel pipe, the test time is A1, and carry out the adhesion test, if the anti-corrosion layer does not fall off, it is qualified and proceed to the next step, otherwise the test is stopped;
把试验样板置于温度80～130℃的鼓风式加热箱中进行高温加速试验，试验10～40小时。Place the test sample in a blast-type heating box with a temperature of 80-130°C for a high-temperature accelerated test, and the test lasts for 10-40 hours.
(2)将防腐钢管进行光老化加速试验，试验时间为A2，并进行变色等级、失光等级及粉化等级的判定，若符合判定要求则合格并进行下一步骤，否则试验停止；(2) The anti-corrosion steel pipe is subjected to the light aging accelerated test, the test time is A2, and the discoloration level, gloss loss level and pulverization level are judged. If it meets the judgment requirements, it is qualified and proceeds to the next step, otherwise the test is stopped;
把试验样板置于光老化试验箱中进行光老化加速试验，按GB/T14522—1993《机械工业产品用塑料、涂料、橡胶材料人工气候加速试验方法》标准方法进行试验，其中，在UVB-313nm，温度60±1℃下，辐照4小时，在温度50±1℃下，凝露4小时，共进行20～60小时。然后按GB/T1766—1995《色漆和清漆涂层老化的评级方法》的规定进行评级判定，看试验样板是否符合变色等级≦0级；失光等级≦1级；粉化等级≦0级的要求。Put the test sample in the light aging test box for accelerated light aging test, according to the standard method of GB/T14522-1993 "Artificial Climate Accelerated Test Method for Plastics, Coatings, and Rubber Materials Used in Machinery Industry Products", in which, the UVB-313nm , at a temperature of 60±1°C, irradiate for 4 hours, and at a temperature of 50±1°C, condense for 4 hours, for a total of 20 to 60 hours. Then judge according to the provisions of GB/T1766-1995 "Rating Method for Aging of Paint and Varnish Coatings" to see if the test sample meets the requirements of discoloration grade≦0 grade; gloss loss grade≦1 grade; chalking grade≦0 grade Require.
(3)将防腐钢管进行高、低温循环试验，试验时间为A3，并进行附着力测试，若防腐层不脱落则合格并进行下一步骤，否则试验停止；(3) Conduct the high and low temperature cycle test on the anti-corrosion steel pipe, the test time is A3, and carry out the adhesion test, if the anti-corrosion layer does not fall off, it is qualified and proceed to the next step, otherwise the test is stopped;
将试验样板置于高低温试验箱中进行高、低温循环试验，其中高温大于80℃，试验1小时，低温小于-20℃，试验1小时，为一周期，共进行5～20小时。Put the test sample in the high and low temperature test box for high and low temperature cycle test, in which the high temperature is greater than 80 ℃, the test is 1 hour, and the low temperature is less than -20 ℃, the test is 1 hour, which is a cycle, and the total is 5 to 20 hours.
(4)将防腐钢管进行冷凝水加速试验，试验时间为A4，并进行附着力测试，若防腐层不脱落则合格并进行下一步骤，否则试验停止；(4) Conduct the condensed water accelerated test on the anti-corrosion steel pipe, the test time is A4, and carry out the adhesion test, if the anti-corrosion layer does not fall off, it is qualified and proceed to the next step, otherwise the test is stopped;
将试验样板置于沸腾状态的蒸溜水中进行冷凝水加速试验，进行10～30小时的试验。Place the test sample in distilled water in boiling state to carry out the condensed water acceleration test, and carry out the test for 10 to 30 hours.
(5)将防腐钢管进行中性盐雾腐蚀试验，试验时间为A5，并进行附着力测试，若防腐层不脱落则合格并返回步骤(1)，共进行B个循环，否则试验停止；(5) Conduct a neutral salt spray corrosion test on the anti-corrosion steel pipe, the test time is A5, and carry out the adhesion test, if the anti-corrosion layer does not fall off, it is qualified and returns to step (1), and a total of B cycles are performed, otherwise the test stops;
将试验样板置于盐雾试验箱中，按GB_T1771-1991《色漆和清漆耐中性盐雾性能的测定》标准方法进行，试验条件：氯化钠浓度为5％，35±2℃，PH＝6.7～7.2，氯化钠溶液雾状沉降量为1～2ml/80cm·h，共进行40～170小时。Put the test sample in the salt spray test chamber, and carry out according to the standard method of GB_T1771-1991 "Determination of Neutral Salt Spray Resistance of Paints and Varnishes". The test conditions: the concentration of sodium chloride is 5%, 35±2°C, pH = 6.7～7.2, the amount of foggy sedimentation of sodium chloride solution is 1～2ml/80cm h, carry out altogether 40～170 hours.
上述加速循环试验的循环次数B为3～10次。The number of cycles B of the above-mentioned accelerated cycle test is 3 to 10 times.
上述附着力测试为将胶粘铝箔或透明胶带粘贴于钢管的防腐层表面，压紧，然后再用180°的剥离力撕掉胶粘铝箔或透明胶带，观察管表面是否有防腐层脱落，或者胶粘铝箔或透明胶带上是否有防腐层残留。The above adhesion test is to paste the adhesive aluminum foil or transparent tape on the surface of the anti-corrosion layer of the steel pipe, press it tightly, and then tear off the adhesive aluminum foil or transparent tape with a peeling force of 180°, and observe whether the anti-corrosion layer falls off on the surface of the pipe, or Whether there is any anti-corrosion layer left on the glued aluminum foil or scotch tape.
最终试验结果判定：当防腐钢管完全符合上述试验a～f的要求，则可应用于空调器产品。Judgment of the final test results: When the anti-corrosion steel pipe fully meets the requirements of the above tests a~f, it can be applied to air conditioner products.
本发明所采用的循环试验，同时考虑了以下五方面：第一、压缩机出口与四通阀体采用一段柔性防腐钢管相接，，四通阀与三通阀体采用一段柔性防腐钢管，它们处于高温状态下，长期高压力振动、冷热交替、阳光辐照、酸性环境、碱性环境、盐雾等综合因素的影响；第二、压缩机的储液罐与四通阀采用一段柔性防腐钢管相连接，它们处于冷凝水状态下，长期高压力振动、低温、阳光辐照、酸性环境、碱性环境、盐雾等综合因素的影响。第三、发明内容中的各项试验必须达到所要求的内容，则防腐钢管合格。第四、本发明针对空调制冷系统的高压力振动对柔性防腐钢管焊接性及强度影响，采取了充分的试验手段进行评估。第五，本发明所用的试验时间不超过3200小时，即可摸拟空调器在实际环境中使用10年后防腐钢管的破坏程度，试验时间较短，较适于空调器企业的试验室试验。The cycle test adopted in the present invention has considered the following five aspects at the same time: first, the compressor outlet and the four-way valve body are connected by a section of flexible anti-corrosion steel pipe, and the four-way valve and the three-way valve body are connected by a section of flexible anti-corrosion steel pipe. In the high temperature state, long-term high pressure vibration, alternating cold and hot, sunlight irradiation, acidic environment, alkaline environment, salt spray and other comprehensive factors; second, the liquid storage tank and four-way valve of the compressor adopt a flexible anti-corrosion The steel pipes are connected, they are in the state of condensed water, and they are affected by comprehensive factors such as long-term high-pressure vibration, low temperature, sunlight radiation, acidic environment, alkaline environment, and salt spray. Third, the various tests in the content of the invention must meet the required content, then the anti-corrosion steel pipe is qualified. Fourth, the present invention adopts sufficient test means to evaluate the influence of the high-pressure vibration of the air-conditioning and refrigeration system on the weldability and strength of the flexible anti-corrosion steel pipe. The 5th, the used test time of the present invention is no more than 3200 hours, can imitate the damage degree of the anti-corrosion steel pipe after the air conditioner is used in the actual environment for 10 years, and the test time is shorter, is more suitable for the laboratory test of the air conditioner enterprise.
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