OPEN TYPE GEOTHERMAL HEAT EXCHANGING APPARATUS AND FLOW RATE CONTROLLING METHOD OF COOLING AND HEATING WATER FOR ROOM USING THIS

摘要

The present invention relates to an open type ground heat exchanging apparatus comprising: a heat pump for supplying cooling and heating water to the inside of a building; a deep well pump arranged in a tubular well drilled in the ground for pumping up water in the tubular well; a heat exchanger for exchanging the heat of water discharged from the heat pump and returned with water pumped up to the deep well pump and returned to the tubular well; a temperature sensor installed in the outlet of the heat exchanger for discharging water pumped up to the deep well pump and returned to the tubular well for measuring a temperature in real-time; and an inverter electrically connected to the deep well pump and the temperature sensor, for varying a frequency according to a flow rate and a water temperature in an outlet of the heat exchanger capable of maintaining the optimal state of a cooling and heating coefficient of performance (COP) of the inside, and controlling the flow rate of the deep well pump. The present invention has an effect of ensuring stability of a system through flow rate control of a deep well pump optimized for heating and cooling efficiency. Moreover, the present invention relates to a method for controlling a flow rate of cooling and heating water using the same.