Zhejiang Yinlun Machinery Co., Ltd., a leading enterprise in China's heat exchanger industry, is not only a "group leader" in drafting industry standards but also holds a dominant position in the global market with its core products such as cooling modules, aluminum oil coolers, and EGR coolers. Its thermal management systems are widely used in critical areas such as automotive powertrains and new energy batteries. As downstream customers demand higher system reliability, cleanliness has become a core bottleneck limiting product performance—metal chips, welding slag, and other particles remaining inside thermal management components can cause microchannel blockage, reduced heat exchange efficiency, and even equipment corrosion and failure.

Previously, Yinlun Machinery used traditional manual visual inspection and gravimetric methods for screening, which had three major drawbacks: firstly, insufficient detection accuracy, unable to quantify particles smaller than 5μm; secondly, low efficiency, with single sample detection taking more than 30 minutes; and thirdly, a lack of systematic traceability capabilities, making it difficult to pinpoint the source of contamination. To overcome this dilemma, Yinlun Machinery urgently needed a professional partner to develop a comprehensive cleanliness control solution.

In 2023, Yinlun Machinery finally selected Infiray Precision Technology (Suzhou) Co., Ltd. as its partner. Infiray, a high-tech enterprise specializing in cleanliness testing of automotive parts, has equipment that fully complies with international standards such as ISO 16232 and VDA 19, and possesses mature experience in customized laboratory construction.

(I) Detection Equipment Adaptability Configuration

Core detection system: A fully automatic cleanliness analysis system is deployed, integrating intelligent polarized light scanning and analysis functions. It can quickly quantify the particle size distribution of 0.1-100μm particles, reducing the detection time to less than 5 minutes, precisely matching the testing needs of precision components such as aluminum oil coolers and EGR coolers.

Dedicated extraction equipment: A customized high-flow perfusion cleaning station is used. For the complex flow channel structure of the cooling module, it employs 0.3MPa low-pressure airflow reverse blowing combined with 40kHz ultrasonic cleaning technology to ensure efficient removal of residual particles.

Traceability analysis tools: Equipped with a scanning electron microscope (SEM) and energy dispersive spectrometer (EDS), it can locate pollution sources (such as aluminum chips and copper welding slag) through particle morphology and elemental analysis.

(II) Supporting Services

Infineon provides simultaneous services including the construction of a Class 10,000 cleanroom, VDA19 standard operation training, and lifetime equipment maintenance services, ensuring that the Yinlun team possesses independent testing and data interpretation capabilities.

This collaboration demonstrates the core value of cleanliness testing for high-end manufacturing – Infineon's integrated capabilities of "equipment + solution + service" have solved Yinlun Machinery's quality control challenges in the field of precision thermal management. The collaborative innovation of both parties not only sets a benchmark for cleanliness testing in the automotive thermal management industry but also showcases a win-win path for deep cooperation between specialized technical service providers and leading manufacturing enterprises.