Dishwasher

Abstract

The present disclosure relates to a dishwasher. The dishwasher according to the present disclosure includes a cabinet forming an external shape; a tub which is disposed inside the cabinet, and forms a washing chamber in which dishes are processed therein; a first circulation duct through which air discharged from the washing chamber flows; a second circulation duct which sends the air flowing through the first circulation duct to the washing chamber; an outside air inflow duct through which air introduced from the outside of the cabinet flows; a heat exchange duct which heat exchanges the air flowing through the outside air inflow duct with the air flowing through the first circulation duct, and discharges the heat-exchanged air to the outside; and a fan assembly which is disposed in a lower side of the tub, and forms a flow of air, wherein the fan assembly includes: a first fan that rotates around a vertically formed rotation shaft, and forms any one of air flow from the first circulation duct to the second circulation duct or air flow from the outside air inflow duct to the heat exchange duct; a second fan which is disposed below the first fan and rotates around a vertically formed rotation shaft, and forms remaining one of air flow from the first circulation duct to the second circulation duct or air flow from the outside air inflow duct to the heat exchange duct; a fan housing forming a first chamber forming a space in which the first fan is disposed and a second chamber forming a space in which the second fan is disposed; and a fan motor which is disposed below the second fan, and rotates the first fan and the second fan.

What is claimed is: 
     
         1 . A dishwasher comprising:
 a cabinet forming an external shape;   a tub which is disposed inside the cabinet, and forms a washing chamber in which dishes are processed therein;   a first circulation duct through which air discharged from the washing chamber flows;   a second circulation duct which sends the air flowing through the first circulation duct to the washing chamber;   an outside air inflow duct through which air introduced from the outside of the cabinet flows;   a heat exchange duct which heat exchanges the air flowing through the outside air inflow duct with the air flowing through the first circulation duct, and discharges the heat-exchanged air to the outside; and   a fan assembly which is disposed in a lower side of the tub, and forms a flow of air,   wherein the fan assembly comprises:
 a fan housing that forms a first inlet port which has a first chamber and a second chamber that are disposed vertically therein, and is opened to an upper side of the first chamber, a first outlet port which is opened to one side of a circumferential surface of the first chamber, a second inlet port which is opened to a lower side of the second chamber, and a second outlet port which is opened to one side of a circumferential surface of the second chamber; 
 a first fan which rotates around a rotation shaft formed vertically inside the first chamber, and forms any one of an air flow from the first circulation duct to the second circulation duct or an air flow from the outside air inflow duct to the heat exchange duct; 
 a second fan which rotates around a rotation shaft formed vertically inside the second chamber, and forms remaining one of the air flow from the first circulation duct to the second circulation duct or the air flow from the outside air inflow duct to the heat exchange duct; and 
 a fan motor which is disposed in a lower side of the second chamber, and transmits rotational force to the first fan and the second fan. 
   
     
     
         2 . The dishwasher of  claim 1 , wherein a third chamber in which the fan motor is disposed is formed below the second chamber in the fan housing. 
     
     
         3 . The dishwasher of  claim 2 , wherein the first chamber is partitioned from the second chamber and disposed above the second chamber, and
 the third chamber is disposed below the second chamber to communicate with the second chamber.   
     
     
         4 . The dishwasher of  claim 1 , wherein the first chamber has a first inlet port, through which air is introduced, that is formed in an upper side, and a first outlet port, through which air is discharged, that is formed in one side of a circumferential surface, and
 the second chamber has a second inlet port, through which air is introduced, that is formed in a lower side, and a second outlet, through which air is discharged, that is formed in one side of a circumferential surface.   
     
     
         5 . The dishwasher of  claim 4 , wherein, in the first chamber, air flowing through the first circulation duct is introduced into the first inlet port and air is discharged to the second circulation duct through the first outlet port and, in the second chamber, air introduced from the outside of the cabinet is introduced to the second inlet port and air is discharged to the heat exchange duct through the second outlet port. 
     
     
         6 . The dishwasher of  claim 4 , wherein the fan housing forms a third chamber that forms a space in which the fan motor is disposed,
 wherein the third chamber is disposed below the second chamber and communicates with the second inlet port.   
     
     
         7 . The dishwasher of  claim 1 , wherein the fan housing comprises:
 an upper cover which forms an upper portion of the first chamber;   a lower cover which forms a lower portion of the second chamber; and   a central cover which is disposed between the upper cover and the lower cover and partitions the first chamber and the second chamber.   
     
     
         8 . The dishwasher of  claim 1 , wherein the fan assembly comprises:
 a first circulation duct-connecting part which connects the first chamber and the first circulation duct;   a second circulation duct-connecting part which connects the first chamber and the second circulation duct; and   a heat exchange duct-connecting part which connects the second chamber and the heat exchange duct,   wherein the first circulation duct-connecting part, the second circulation duct-connecting part, and the heat exchange duct-connecting part are disposed in a front-rear direction in one side surface of a lower portion of the tub.   
     
     
         9 . The dishwasher of  claim 1 , further comprising a circulation part heater which is disposed inside the second circulation duct and heats a flowing air. 
     
     
         10 . The dishwasher of  claim 1 , wherein the heat exchange duct is disposed between the first circulation duct and the tub. 
     
     
         11 . The dishwasher of  claim 10 , wherein the first circulation duct is disposed between the cabinet and the heat exchange duct. 
     
     
         12 . The dishwasher of  claim 1 , wherein the heat exchange duct has one side surface that surface-contacts the tub, and has the other side surface that surface-contacts the first circulation duct.