Radio frequency dryer RFA/HP

continuousfor the textile industrycooler

Description
The RFA/HP dryer is a conveyorised continuous-throughput drying machine designed for yarn packages. It combines radio frequency (RF) energy with a forced-air flow through the packages, enabling a passing-through airflow in a continuous RF dryer. The combined RF and through‑air process increases drying efficiency and achieves high hourly productivity while operating at reduced drying temperatures.

Working principle and benefits
Forced air is passed through the yarn packages and preheated by recovering heat dissipated from the RF generator. RF energy and the warm forced air jointly contribute to water evaporation. This combination improves energy use and provides precise control of product internal temperature, optimising drying uniformity and quality.

Optional enhancements — air treatment and heat pump
The system can integrate a heat pump to improve air cooling/drying and generator cooling. With a heat pump the ambient air is treated in four stages before being forced through the yarn:

• filtration
• cooling and dehumidification
• heat recovery from the RF generator
• heat recovery from the heat pump

Control and automation
The dryer is fully automatic and managed by a PLC. Multiple process recipes for different yarn package types can be stored and recalled. Optional features include a barcode scanner for product identification and automatic machine setup, and a modem connection for online communication and troubleshooting.

Positioning, performance and advantages
The RFA/HP dryer delivers higher hourly productivity than RF dryers with the same generator size, while maintaining lower drying temperatures. The combined RF and forced-air approach enhances process control and drying consistency for industrial textile production.

Applications
Designed for yarn packages (cones, bobbins, packages) on a conveyorized line, suitable for continuous drying in textile manufacturing where uniform quality and high throughput are required.

Characteristics / technical specifications

• Product type: conveyorised continuous-throughput dryer for yarn packages
• Technology: radio frequency (RF) combined with forced-through airflow
• Airflow generation: internal preheating by recovery of heat from the RF generator (no additional external heat source required for preheating)
• Heat pump: optional integration to improve cooling, dehumidification and heat recovery
• Air treatment (with heat pump): filtration; cooling and dehumidification; heat recovery from RF generator; heat recovery from heat pump
• Automation: PLC control with programmable and recallable process recipes
• Options: barcode scanner for product ID and auto-setting; modem/remote communication for diagnostics
• Performance: higher hourly productivity compared with RF dryers of comparable generator size at reduced drying temperatures