YTE Automotive Humidity Control Specialists

2019-01-19 10:22 YTE HVAC Senior Project Manager: BJ Chen

YTE Automotive Humidity Control Specialists

The automotive industry requires precise air quality control requirements when producing cars or any automotive components. Without these controls, the risks of manufacturing errors caused by extremes of humidity or even condensation are at increased risk.

Some of the issues seen within the automotive industry over the years include:

Battery Production – The move is now to ever-increasing numbers of electric vehicles, whether entirely electric or hybrid models. The battery technology associated with this drive to electric power involves the use of Lithium as a component, and the production of the batteries is undertaken in very low dewpoint (low humidity) environments with a working condition of less than 1%RH. Systems are installed to assist in this process and are readily available to the automotive industry.

Environmental Chambers – Product development often requires artificially created environments to replicate the effects of driving in extreme conditions. Often conditions lower than -60 to -70℃ are necessary, and dehumidification removes the risk of the freezing air affecting other components.

Glass Production – It is imperative to ensure that laminated windscreens and other glass parts contain no moisture when bonded. Any trapped molecules can lead to explosive conditions inside the autoclave.

Tyre Production – Ensuring that the steel wires used in the radial-ply in tyres are free from corrosion ensures the best quality product and a safe journey home.

Paint Shop Issues – With the move away from solvent-based paints, the ambient humidity affects modern water-based finishes, which vary from season to season. It leads to different drying periods in summer compared to winter and the risk of bottlenecks in production.

Drench testing is commonly performed on high-end vehicles to detect water infiltration from all angles, using de-ionised water. After the test is concluded, the automobile undergoes a thorough drying process using heated and dehumidified air to eliminate all water traces.

During summer months, injection moulded parts may develop condensation due to chilly moulds in such facilities. This may result in blistering or staining on the moulded item, leading to rework, decreased production rates, and potential failure to meet JIT deadlines.

Additionally, stored parts are vulnerable to atmospheric corrosion when the humidity is uncontrolled. considerable challenge where inventory levels are high to meet the expected demand for body panels or other ferrous components.

Moreover, as trim pieces are often produced by sub-suppliers on a JIT basis, varying levels of humidity can pose issues with drying adhesives on leather trim panels, which are made with non-solvent-based adhesives.

Car Storage - While not necessarily exclusive to new car manufacturers, a dehumidification system can effectively safeguard classic and valuable cars against damage from corrosion and mould. Private individuals and commercial car storage facilities frequently use such systems for this purpose.


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