GB / T2423.1-2001 / ICE60068-2-1: 1990 Electrical and Electronic Products Environmental Test Part 2: Test methods, the low temperature test involved in this standard is applicable to non-heat dissipation and heat dissipation test samples. For non-heat dissipation tests Samples, tests Aa and Ab do not violate the standards issued in the early days, and are only used to assess or determine the suitability of electrical and electronic products (including components, equipment and other products) to be stored or used under low temperature conditions. This low temperature test Can not be used to evaluate the resistance of the test sample to temperature changes and the working ability during temperature changes. In this case, the test N: temperature change test method should be used. The low temperature test method is divided into three categories: non-heat dissipation test Sample low temperature test: 1. Test Aa: temperature mutation; 2. Test Ab: temperature gradual change; 3. Test Ad: temperature gradual change. This test method is usually used for test samples that can reach temperature stability during the condition test. The test duration is from The calculation starts when the temperature of the test sample reaches stability. In special cases, if the test sample does not reach temperature stability during the conditional test, the test duration is from high When chamber temperature reaches counted a predetermined test temperature, the relevant specification shall: a. The temperature change rate in the test chamber, the standard heating rate is: 1.0 ～ 3.0 ℃ / min, the cooling rate is: 0.7 ～ 1.0 ℃ / min, and can also be customized according to user needs 1-30 ℃ / min (linear or average) ; b. The time for the test sample to enter the test box; c. The time when the test sample is exposed to the test under the test conditions; d. The time that the test sample is energized or loaded (the load conditions include: the load, heat dissipation and other factors of the tested sample); briefly describe the standard environmental test of the high and low temperature test chamber Office sofa is a common type of chair furniture in the office, providing employees with a comfortable working environment and rest space. According to different functions and design styles, office sofas can be divided into multiple categories. Fabric Sofa,Leather Sofa,Business Sofa,Visitor Sofa Foshan Shengshi Zhihui Technology Co., Ltd. , https://www.officer-furniture.com
1. Classification by Function
1) Rest sofa: The rest sofa is designed to provide a place for employees to rest and relax. It usually uses soft materials and comfortable seat cushions to provide a comfortable sitting posture and support. Rest sofas are usually large and can be used by multiple people simultaneously, sometimes equipped with armrests and backrests to provide better support and comfort.
2) Reception sofa: A reception sofa is a place used to receive visiting guests, usually placed in the reception area of the office. It generally adopts a simple and elegant design style, paired with a fashionable appearance and comfortable seat cushions, to leave a good impression on visitors.
3) Conference sofa: A conference sofa is a chair furniture used in office meeting rooms. It usually adopts a minimalist design style, paired with comfortable cushions and support to provide a comfortable meeting environment. Conference sofas are usually large and can be used by multiple people at the same time. Sometimes, they are also equipped with a desktop and socket, making it convenient for attendees to discuss and use electronic devices.
2. Classified by design style
1) Minimalist style sofa: Minimalist style sofas are characterized by simple, clear lines and simple shapes, emphasizing functionality and practicality. It usually adopts neutral tones and simple design elements, suitable for modern office decoration styles.
2) European style sofa: European style sofas are characterized by luxurious and exquisite decorations and curved shapes, giving people an elegant and romantic feeling. It usually uses delicate carvings and patterns, suitable for traditional or luxurious office decoration styles.
3) Modern style sofa: Modern style sofas are characterized by a simple and fashionable design, emphasizing smooth lines and practical functions. It usually adopts simple geometric shapes and neutral tones, suitable for modern office decoration styles.