1. Resistance change and energy saving

Use the on and off rotary heat exchange integrated device, during the ventilation season, put on the heat exchange to reduce the internal resistance of the unit, to achieve energy-saving operation.

2. Simple and reliable

The openable heat exchanger unit can be mounted directly in the air duct of subway station, simple installation, save spaces of machine room, reduce investment costs.

3. Compatible smoke discharge

The openable heat exchange unit can be turned on in the smoke discharge mode, reduce smoke discharge resistance, can withstand 250 ℃ high temperature flue gas, no leakage within 1 h, no distortion, no collapse, no barrage for the exhaust passage.

4. Safe anti-freeze

Coils are emptying structure, each circuit are maintained at the same angle of inclination to facilitate draining, the drain valve is disposed in the lowermost collector pipes and lower than the lowermost heat exchange tube can be shut down when the water drain; Direct expansion unit is in use of direct evaporation of refrigerant, completely avoid the occurrence of the coil cracking.