Lg Electronics Inc.

Jae Sun Song

Jeong Hun Kim

Hyoung Suk Woo

Min Chul Cho

A ventilation system and a controlling method of such a ventilation system are provided. The ventilation system may exhaust internal air from and draw fresh external air into a designated space. When an outdoor temperature is below a freezing point, some of the internal components of the ventilation system may be damaged due to the low external air temperature. This ventilation system controls operation of a supply fan and/or an exhaust fan based on the temperature of supplied and/or exhausted air to prevent such damage.

Ventilation system and controlling method of the same

A water circulation system associated with a refrigerant cycle that includes an intermediate heat exchanger having a triple-pipe shape in which three independent flow passages are formed by three pipes having a concentric axis and different diameters. Accordingly, three fluids flowing through the three independent flow passages can exchange heat with each other at the same time through the intermediate heat exchanger and heat exchange capacity of the intermediate heat exchanger can selectively be varied.

Growing community of inventors

Changwon-si, South Korea

Jae Sun Song