Sound insulation, heat preservation and heat insulation box body and walk-in type high and low temperature silencing box

Abstract

The invention discloses a sound insulation, heat preservation and heat insulation box body and a walk-in type high-low temperature silencing box. The sound insulation, heat preservation and heat insulation box body is composed of a sound insulation, heat preservation and heat insulation plate. The sound insulation, heat preservation and heat insulation plate is composed of an outer wall steel plate, a damping sound insulation plate, a sound absorption material, a middle steel plate, a fiber cement plate, a foaming polyurethane material, a sound absorption and heat insulation material and an inner wall steel plate which are sequentially arranged from outside to inside. The problems that a conventional plate forming the sound insulation, heat preservation and heat insulation box is poor in low and medium frequency sound insulation performance and prone to forming resonance sound transmission are solved, and the sound insulation, heat preservation and heat insulation box has the advantages of being excellent in sound insulation performance and heat preservation and heat insulation performance. The step-in type high and low temperature silencing box adopts a sound insulation, heat preservation and heat insulation box body, can simulate a large-span variable temperature and humidity environment with the dry-bulb temperature of-40-150 DEG C and the wet-bulb temperature of 40-95%, can realize a free sound field function of a silencing test room by installing a sound absorber, can reduce the noise of a fan by a ventilation silencer, and can improve the noise reduction performance of the sound absorption test room. Therefore, the background noise in the noise elimination test room is ensured.

Description

technical field [0001] The invention relates to high and low temperature and acoustic test equipment, in particular to a sound-insulation, heat-insulation and heat-insulation box and a walk-in high and low temperature muffler box. Background technique [0002] The walk-in high and low temperature box is used for the adaptability test of electrical and electronic products and their original components, compressors and other finished products when they are stored, transported and used in high temperature and low temperature environments. The test equipment is mainly used to simulate the physical and other related characteristics of the product in accordance with the requirements of national standards or user-defined requirements under low temperature and high temperature conditions, and judge whether the performance of the product can still meet the requirements through testing. Predetermined requirements for product design, improvement, appraisal and factory inspection. The ...

AI Technical Summary

Problems solved by technology

[0003] First, the existing walk-in high and low temperature chambers can usually only simulate high and low temperature environments, but cannot simulate the sound field environment, and cannot test the noise and vibration data of products operating under the influence of high and low temperature environments according to national standards, as well as the performance in different environments. Changes;

[0004] Second, the existing walk-in high and low temperature boxes are usually constructed of polyurethane foam storage boards. Although they have good thermal insulation performance, their sound insulation performance is poor and cannot meet the low noise requirements of acoustic tests. The foaming process makes the high temperature resistance of polyurethane within 80°C, so that when the walk-in high and low temperature box is used in the later stage, the heat insulation performance will gradually decrease, and the resulting heat loss is often filled by energy consumption, resulting in energy waste ;

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