MULTI-RANGE INDOOR AIR-CONDITIONING HEATING SYSTEM AND VENTILATION CONTROL SYSTEM AND THE ENERGY-EFFICIENT CONTROL METHOD OF THE SAME

摘要

An indoor cooling/heating system for multiple areas, a ventilation system and an energy control method thereof are provided to realize reliable and continuous operation under temperature conditions changing continuously in a wide range from -40°C to 25°C through various defrosting structures in cross, cross-reverse, and cross-exhaust types. An indoor cooling/heating system for multiple areas includes a compressor(101), a condenser(102), an expansion valve(103), first and second evaporators(121,122) having outlet parts connected to the main compressor, first and second control valves for stopping refrigerant flow in the first and second evaporators when the first and second evaporators are in defrosting operation, insulating elements for the first and second evaporators, room temperature sensors, first and second temperature sensors for insulated spaces of the first and second evaporators, an atmospheric temperature sensor, first and second air suction fans and first and second room air suction control valves for controlling room air flow toward the insulated spaces of the first and second evaporators, atmospheric air suction ducts having paths from the outside to the insulated spaces, chilled air outlet ducts having paths from the insulated spaces to the outside, first and second ventilation fans for controlling air flow from the insulated spaces to the chilled air ducts and carrying out ventilation, and a boosting control valve(198) such as a servo valve and a boosting element such as a boosting turbine(199) for compensating vaporization rates and decrease of heat absorption rates during operation.