Total heat exchange-type ventilating apparatus, and method for controlling same

Abstract

The present invention relates to a total heat exchange-type ventilating apparatus and a method for controlling same, which detects indoor and outdoor temperatures and humidities, calculates indoor and outdoor enthalpies from the detected temperature and humidity information, and selectively operates in a heat exchange mode or in an outdoor air cooling mode through the result of comparing the magnitudes of the enthalpies, thereby controlling the indoor temperature and humidity to be maintained at comfortable levels. To accomplish this, the apparatus of the present invention comprises: a first exhaust chamber ( 30 ) and a second exhaust chamber ( 40 ); a first air supply chamber ( 10 ) and a second air supply chamber ( 20 ); a total heat exchanger ( 50 ) for exchanging heat between indoor air introduced from the first exhaust chamber ( 30 ) to the second exhaust chamber ( 40 ) and outdoor air introduced from the first air supply chamber ( 10 ) to the second air supply chamber ( 20 ); a bypass pipe ( 60 ) which forms an airflow channel for enabling outdoor air to be directly introduced into an indoor area without passing through the total heat exchanger ( 50 ) during a free cooling operation; a first temperature sensor ( 31 ) and a first humidity sensor ( 33 ) for sensing the temperature and humidity of the indoor air; a second temperature sensor ( 11 ) and a second humidity sensor ( 13 ) for sensing the temperature and humidity of the outdoor air; and a control unit ( 70 ) which calculates the enthalpies of the indoor air and outdoor air on the basis of the temperatures and humidities of the indoor air and outdoor air, compares the sizes of the enthalpies, and controls an outdoor air inflow path.

1 . A total heat exchange type ventilating apparatus, comprising:
 a first air exhaust chamber ( 30 ) into which indoor air is introduced through an indoor air suction opening ( 32 );   a second air exhaust chamber ( 40 ) from which the indoor air that is passed through the first air exhaust chamber ( 30 ) is exhausted to the outdoor area through an indoor air exhaust opening ( 42 );   a first air supply chamber ( 10 ) into which outdoor air is introduced through an outdoor air suction opening ( 12 );   a second air supply chamber ( 20 ) from which the outdoor air that is passed through the first air supply chamber ( 10 ) is exhausted through an outdoor air exhaust opening ( 22 );   a total heat exchanger ( 50 ) exchanging heat between the indoor air introduced from the first air exhaust chamber ( 30 ) to the second air exhaust chamber ( 40 ) and the outdoor air introduced from the first air supply chamber ( 10 ) to the second air supply chamber ( 20 );   a bypass pipe ( 60 ) connected between the outdoor air suction opening ( 12 ) and the outdoor air exhaust opening ( 22 ) to form an air passage so that the outdoor air can be directly introduced into the indoor area without passing through the total heat exchanger ( 50 ) during free cooling;   a first temperature sensor ( 31 ) for detecting a temperature of the indoor air and   a first humidity sensor ( 33 ) for detecting a humidity of the indoor air; and   a second temperature sensor ( 11 ) for detecting a temperature of the outdoor air and   a second humidity sensor ( 13 ) for detecting a humidity of the outdoor air; and   a control unit ( 70 ) for calculating enthalpies of the indoor air and the outdoor air from the temperatures and humidities of the indoor air and the outdoor air, and comparing the magnitudes of the enthalpies of the indoor air and the outdoor air to control an intake path of the outdoor air to be selected from a heat exchange mode or a free cooling mode.   
     
     
         2 . The total heat exchange type ventilating apparatus of  claim 1 , wherein the first temperature sensor ( 31 ) and the first humidity sensor ( 33 ) are installed in an air passage of the indoor air suction opening ( 32 ), and the second temperature sensor ( 11 ) and the second humidity sensor ( 13 ) are installed in an air passage of the outdoor air suction opening ( 12 ). 
     
     
         3 . A method of controlling a total heat exchange type ventilating apparatus, comprising:
 (1) detecting temperatures and humidities of indoor air and outdoor air;   (2) calculating enthalpies of the indoor air and the outdoor air from the temperatures and humidities of the indoor air and the outdoor air;   (3) comparing the magnitudes of the enthalpy of the indoor air and the enthalpy of the outdoor air; and   (4) controlling such that in the result of comparing the magnitudes of the enthalpies, when the enthalpy of the indoor air is higher than the enthalpy of the outdoor air, free cooling where the outdoor air is directly introduced into an indoor area via a bypass filter ( 60 ) is performed, and when the enthalpy of the indoor air is lower than the enthalpy of the outdoor air, the outdoor air is heat-exchanged through the total heat exchanger ( 50 ) and is introduced into the indoor area.   
     
     
         4 . The method of  claim 3 , further comprising:
 determining whether a dew condensation condition during winter is satisfied, between step (2) and step (3),   wherein if the dew condensation condition is satisfied, the outdoor air is blocked from being introduced into the indoor area and the indoor air is allowed to be exhausted to the outdoor area.   
     
     
         5 . The method of  claim 4 , wherein if the dew condensation condition is not satisfied in determining whether the dew condensation condition during winter is satisfied, the method further comprises:
 (A) determining whether it is summer;   (B) determining whether the indoor area requires cooling; and   (C) determining whether the indoor temperature is higher than the outdoor temperature, and   if all the conditions are satisfied in steps (A) to (C), free cooling is performed, and if any one of the conditions is not satisfied in steps (A) to (C), the outdoor air is introduced into the indoor area after exchanging heat.