First、Project introduction
Kanghong environmental technology co., LTD was established in 1994. The company is devoted to the air treatment industry and specializes in the development, production and sale of air purifier and small dehumidifier.
Kanghong is an OEM manufacturer and exporter of air purifier and mini dehumidifier. With excellent r&d team, efficient production system and first-class quality, kanghong has established stable sales channels in the United States, Canada, Europe, Japan, South Korea and other major markets. From product industrial design, plate making, mold production to mass production, kanghong has a very rich experience in the industry.
Kanghong has advanced technology, HEPA air purifier has HEPA efficient filter, UV lamp and photocatalyst network, active carbon filter and anion technology. Small dehumidifier USES the most advanced thermoelectric semiconductor refrigeration technology, mute, no compressor technology.
Kanghong will continue to develop new products to meet different customer needs to improve indoor air quality and comfort.
Designed and built by guangzhou danpin artificial environment technology co., LTD., the multi-function sound elimination room is completed and checked within the specified time. After the completion and acceptance of the product, continue to assume the responsibility of quality assurance, warranty, maintenance and technical support. Installation place is in buyer’s factory.
Second、Project requirements
Product project content:
The construction plan and materials for the semi-anechoic chamber installation project shall be designed and installed by Party B. Party B shall apply all or part of its “turbocharged micro-cycle frequency conversion noise reduction ventilation” (Patent No.: 200520108948.5) to Party A’s semi-muffling. Room installation project construction;
1) The effective net size inside the semi-anechoic chamber installation project: 5000m × 5000mm × 2700mm, the external effective dimensions after fabrication are: 6600mm × 6600mm × 3700mm;
2) The installation project of the semi-anechoic chamber installs 8 professional non-echo and non-noise lighting lamps, and the 6 second and third sockets are extended accordingly to the concave shape interior suitable for use of the sound absorbing anechoic cone.
3) Personnel access door size: W × H = 1.2 × 2.0 (m);
Semi-anechoic chamber product acceptance main terms:
In the absence of external abnormal interference, when the external noise is ≤75dB(A), the noise floor is ≤20dB(A);
The cutoff frequency of the approximate semi-free field environment above the indoor reflecting surface is satisfied. Fc ≤ 100 Hz
Third、Acoustic design
1. Sound insulation design to achieve background noise index
2, sound absorption design to achieve the performance of semi-free sound field
3, noise reduction design to achieve aerodynamic performance
Forth、On-site production and construction
Fifth、On-site measurement and acceptance
Sixth、Test Results：
1. Ambient noise value Len (A) =75dB (A), and indoor background noise value Lgn (A) = 17.7db (A);
2. Performance of semi-free sound field: 1/3 frequency band analysis was performed within the frequency range of 100Hz~20KHz. By comparing the spatial attenuation of sound pressure emitted by the testing sound source with the attenuation of the inverse square law of sound pressure with distance in the ideal semi-free sound field, the deviation values were all within the maximum allowable deviation.
The detailed manufacturing process, construction process and acceptance technical specifications of the above complete sound elimination room manufacturing and construction installation can be downloaded to the download center of the company’s official website for free, or please scan the company’s WeChat public service code for free promotion.
