HEAT PUMP SYSTEM OF TWO STEP COMPRESSION TYPE HAVING EXHAUST LINE OF MEDIUM TEMPERATURE HOT WATER

摘要

PURPOSE: A two-stage compression type heat pump system with a medium-temperature water discharging line is provided to obtain medium-temperature water or cold water in a heating or a cooling mode by installing a heat accumulator for the medium-temperature water on a circulating line installed in between a low-temperature condenser and a high-temperature evaporator. CONSTITUTION: A two-stage compression type heat pump system comprises a low-temperature cycle(200), a high-temperature cycle(300), a circulating line(420), a heat storage tank for medium-temperature water(400), and a medium-temperature water discharging line(410). The circulating line is installed to guide the flow of circulating water for exchanging heat between a low-temperature condenser(220) of the low-temperature cycle and a high-temperature evaporator(340) of the high-temperature cycle. The heat storage tank for medium-temperature water is installed in the circulating line to exchange heat with the circulating water flowing along the circulating line. The medium-temperature water discharging line is installed in the heat storage tank for medium-temperature water in order to discharge the medium-temperature water to the outside.