Total heat exchanger and ventilation system using the same

Abstract

A total heat exchanger having a structure capable of achieving an enhancement in total heat efficiency, and a ventilation system using the total heat exchanger are disclosed. The total heat exchanger includes an air supply duct for guiding outdoor air to an indoor space, an air discharge duct for guiding indoor air to the outdoors, an air supply fan arranged at one side of the air supply duct, the air supply fan sucking the outdoor air, and supplying the sucked air to the indoor space, an air discharge fan arranged at one side of the air discharge duct, the air discharge fan sucking the indoor air, and discharging the sucked air to the outdoors, and a heat exchanging element arranged at a region where the indoor air and the outdoor air cross each other, the heat exchanging element heat-exchanging the indoor air with the outdoor air. The heat exchanging element has a shape causing the indoor air and the outdoor air to flow through the heat exchanging element while forming an acute angle with respect to each other.

1 . A total heat exchanger comprising: 
 an air supply duct for guiding outdoor air to an indoor space;    an air discharge duct for guiding indoor air to the outdoors;    at least one air supply fan arranged at one side of the air supply duct, the air supply fan sucking the outdoor air, and supplying the sucked air to the indoor space;    at least one air discharge fan arranged at one side of the air discharge duct, the air discharge fan sucking the indoor air, and discharging the sucked air to the outdoors; and    at least one heat exchanging element arranged at a region where the indoor air and the outdoor air cross each other, the heat exchanging element heat-exchanging the indoor air with the outdoor air,    wherein the heat exchanging element has a shape causing the indoor air and the outdoor air to flow through the heat exchanging element while forming an acute angle with respect to each other.    
   
   
       2 . The total heat exchanger according to  claim 1 , wherein the heat exchanging element has a cross-sectional height smaller than a cross-sectional width of the heat exchanging element.  
   
   
       3 . The total heat exchanger according to  claim 1 , wherein the heat exchanging element has a substantially-polygonal cross section.  
   
   
       4 . The total heat exchanger according to  claim 3 , wherein the heat exchanging element has a substantially-diamond cross section.  
   
   
       5 . The total heat exchanger according to  claim 1 , wherein the at least one heat exchanging element comprises a plurality of heat exchanging elements arranged in series in a flow direction of air in the total heat exchanger.  
   
   
       6 . The total heat exchanger according to  claim 5 , wherein the heat exchanging elements guide an air flow passing through the air supply duct and an air flow passing through the air discharge duct such that the air flows pass through the heat exchanging elements in a zig-zag manner.  
   
   
       7 . The total heat exchanger according to  claim 1 , further comprising: 
 an air-discharge-side bypass passage branched from the air discharge duct, and adapted to guide the indoor air to be directly discharged to the outdoors by a forcible suction force of the air discharge fan, without passing through the heat exchanging element.    
   
   
       8 . The total heat exchanger according to  claim 1 , further comprising: 
 an air-supply-side bypass passage branched from the air supply duct, and adapted to guide the outdoor air to be directly discharged to the indoor space by a forcible suction force of the air supply fan, without passing through the heat exchanging element.    
   
   
       9 . The total heat exchanger according to  claim 1 , further comprising: 
 a filter unit arranged in the air supply duct, and adapted to remove foreign matter contained in the outdoor air.    
   
   
       10 . The total heat exchanger according to  claim 1 , wherein the air supply fan includes a rotating shaft extending perpendicularly to a discharge direction of the outdoor air discharged to the indoor space.  
   
   
       11 . The total heat exchanger according to  claim 10 , wherein the at least one air supply fan comprises a plurality of air supply fans, 
 further comprising:    a dual-axial motor for simultaneously driving the air supply fans.    
   
   
       12 . The total heat exchanger according to  claim 1 , wherein the air discharge fan includes a rotating shaft extending perpendicularly to a discharge direction of the indoor air discharged to the outdoors.  
   
   
       13 . The total heat exchanger according to  claim 12 , wherein the at least one air discharge fan comprises a plurality of air discharge fans, 
 further comprising:    a dual-axial motor for simultaneously driving the air discharge fans.    
   
   
       14 . The total heat exchanger according to  claim 1 , further comprising: 
 an air supply chamber for storing air discharged by the air supply fan; and    an air discharge chamber for storing air discharged by the air discharge fan.    
   
   
       15 . A ventilation system comprising: 
 an air supply duct for guiding outdoor air to an indoor space;    an air discharge duct for guiding indoor air to the outdoors;    an air supply fan arranged at one side of the air supply duct, the air supply fan sucking the outdoor air, and supplying the sucked air to the indoor space;    an air discharge fan arranged at one side of the air discharge duct, the air discharge fan sucking the indoor air, and discharging the sucked air to the outdoors;    a heat exchanging element arranged at a region where the indoor air and the outdoor air cross each other, the heat exchanging element heat-exchanging the indoor air with the outdoor air;    a first extension duct including a first diffuser for diffusing the outdoor air supplied from the air supply duct into the indoor space; and    a second extension duct including a second diffuser spaced apart from the first diffuser by a predetermined distance,    wherein the heat exchanging element has a shape causing the indoor air and the outdoor air to flow through the heat exchanging element while forming an acute angle with respect to each other.    
   
   
       16 . The ventilation system according to  claim 15 , wherein the first extension duct further includes a lower extension duct for connecting the air supply duct to the indoor space, and an upper extension duct for connecting the air supply duct to the outdoors.  
   
   
       17 . The ventilation system according to  claim 15 , wherein the second extension duct further includes a lower extension duct for connecting the air discharge duct to the indoor space, and an upper extension duct for connecting the air discharge duct to the outdoors.