| 摘要 |
PURPOSE: An air handling unit with a multi-stage heat exchanger is provided to increase heat exchange efficiency because a multi stage heat exchanger is installed in traverse direction in the upper part of the air handling unit in order to exchange heat between exhaust air and outdoor air in multi-stage. CONSTITUTION: An air handling unit with a multi-stage heat exchanger comprises an indoor air suction chamber(10), an air passing chamber(20), an air handling unit(100), a first heat exchanger(40), a second heat exchanger(50), an outdoor air supply chamber(60), an exhaust air discharge chamber(53), a heat exchanged outdoor air supply chamber(42), an exhaust air passing chamber(15), a discharge air passing chamber(46), and an outdoor air passing chamber(57). A return fan(14) is installed in the indoor air suction chamber. The air passing chamber is installed in the right side of the indoor air suction chamber and comprises a first outdoor air damper(23), blocking or passing through the outdoor air, a second outdoor air damper(24), blocking or passing through the outdoor air sucked from the first heat exchanger, an outdoor air filter(21), and a heat exchanger coil(22). The first and second heat exchangers exchange heat between air, exhausted from the indoor air suction chamber, and outdoor air, supplied from an outdoor air inlet(61), in double stage. The heat exchanged outdoor air supply chamber supplies air, discharged from a first discharge port(41) of the first heat exchange, to the second outdoor air damper. The exhaust air passing chamber supplies air, exhausted from the indoor air suction chamber, to an exhaust air supply port of the first heat exchanger.
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