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Method for resisting frosting and condensation in rapid temperature change experiment

A temperature change and anti-frost technology, applied in the directions of temperature control, strength characteristics, and measurement of electrical variables, to achieve the effects of avoiding rework, ensuring work efficiency, and improving economic benefits

Active Publication Date: 2014-11-19
XIAN INSTITUE OF SPACE RADIO TECH
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  • Claims
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Problems solved by technology

[0014] The above method is acceptable as an auxiliary measure, and does not start with the contradiction between rapid temperature changes and frost condensation, and study the method of cracking the anti-frost condensation

Method used

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  • Method for resisting frosting and condensation in rapid temperature change experiment

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Experimental program
Comparison scheme
Effect test

Embodiment

[0047] Determine the test piece

[0048] The test piece is a stand-alone product of a certain model, the product material is aluminum, and the actual weight is 1.57kg. During the test, 4 temperature measuring points T1~T4 are evenly arranged on the outer surface of the product;

[0049] Implementation steps

[0050] 1) The weighing result of the product is 1.57kg;

[0051] 2) The outer surface area of ​​the product measured by CAD software is 736.8cm 2 ;

[0052] 3) According to the mass and area data, the product S / M value can be calculated as 469.3cm 2 / kg;

[0053] 4) According to the S / M value, determine the no-load temperature change rate of the thermostat as 5°C / min;

[0054] 5) The incubator selected for the test is the German Fuqi incubator (VTS7027-15);

[0055] 6) Compile the thermostat control program, the main parameters of which are as follows:

[0056] The no-load temperature change rate is 5°C / min;

[0057] Test temperature range -40℃~+85℃;

[0058] The...

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Abstract

The invention relates to a method for resisting frosting and condensation in a rapid temperature change experiment, belonging to the technical fields of stress screening, environmental stimulation and reliability testing of electronic products. The method comprises the steps: determining the mass of a product; determining the surface area of the product; figuring out a ratio of the area to the mass according to the surface area and the mass of the product; on the premise that the surface of the product achieves an average temperature change rate of 3-5 DEG C / min, selecting a smaller no-load temperature change rate of a thermostat as much as possible, determining a no-load temperature change rate of the thermostat; and placing the product in the thermostat, inflating the thermostat to ensure that the thermostat is in a positive pressure state inside; and controlling the temperature of the thermostat according to the no-load temperature change rate of the thermostat, wherein after a test is ended, no frosting or condensation is caused on the surface of the product.

Description

technical field [0001] The invention relates to a rapid temperature change test anti-frost and condensation method, which belongs to the technical field of electronic product stress screening, environmental simulation and reliability test. The rapid temperature change refers to that the no-load temperature change rate of the thermostat is 5-15°C . Background technique [0002] In order to ensure the quality and reliability of electronic products, electronic products must undergo various tests and assessments before they are delivered to users or introduced to the market to ensure that their functions and performance during use meet user requirements. The commonly used test categories can be divided into stress screening, environmental simulation test and reliability test. [0003] Stress screening test is a test to eliminate early failures caused by material, process and manufacturing defects, and to ensure that qualified products are delivered to users as required. Genera...

Claims

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Application Information

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IPC IPC(8): G01N3/60G01N17/00G01R31/00G05D23/00
Inventor 左刚崔福利刘斌汪新刚张立王学科王志兵柴继泽邬思远
Owner XIAN INSTITUE OF SPACE RADIO TECH
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