Cooking appliance

Abstract

A cooking appliance includes a casing having a cavity and an electric chamber therein, and a door disposed in front of the casing to open and close the cavity. A cooling fan module is disposed at the electric chamber, and sucks external air and discharges air to an exhaust port in front of the casing. A bottom spacer protrudes from the casing, and the bottom spacer spaces a lower surface of the casing and a seating surface on which the casing is seated from each other to form an intake port. A first air flow path is formed at the lower portion of the casing so that air introduced through the intake port flows to a rear space of the casing, and a second air flow path connecting the first air flow path and the electric chamber to each other may be formed at the rear space of the casing.

What is claimed is: 
     
         1 . A cooking appliance comprising:
 a casing having a cavity and an electric chamber separated from the cavity;   a door located at a front of the casing, the door being configured to open and close the cavity;   an exhaust port at a front of the casing;   a cooling fan located in the electric chamber, the cooling fan being configured to suck external air and to discharge air to the exhaust port;   a bottom spacer protruding from a lower portion of the casing to space the casing from a seating surface such that a lower surface of the casing and the seating surface define an intake port;   a first air flow path located in the lower portion of the casing such that air introduced through the intake port flows to a rear space of the casing; and   a second air flow path located at the rear space of the casing, the second air flow path connecting the first air flow path to the electric chamber.   
     
     
         2 . The cooking appliance of  claim 1 , wherein the casing includes a lower plate and an upper plate at the lower portion of the casing, the lower plate and the upper plate being located at different heights to define the first air flow path. 
     
     
         3 . The cooking appliance of  claim 2 , wherein the bottom spacer protrudes downward from the lower plate. 
     
     
         4 . The cooking appliance of  claim 2 , wherein the lower plate has an inlet vertically penetrating the lower plate, the inlet being in communication with the intake port. 
     
     
         5 . The cooking appliance of  claim 4 , wherein the inlet is located at a front portion of the lower plate adjacent the door. 
     
     
         6 . The cooking appliance of  claim 2 , further comprising:
 a door hinge connecting the door to the casing; and   a blocking part extending upward at the upper plate, the blocking part being located rearward of the door hinge,   wherein a portion of the lower plate contacts a portion of the upper plate.   
     
     
         7 . The cooking appliance of  claim 1 , further comprising a rear cover,
 wherein the casing includes a rear casing, and   wherein the second air flow path is defined between the rear casing and the rear cover.   
     
     
         8 . The cooking appliance of  claim 7 , wherein the rear casing includes a connection passage connecting the first air flow path to the second air flow path, the connection passage being located at a lower portion of the rear casing. 
     
     
         9 . The cooking appliance of  claim 1 , further comprising:
 a first heat source located above the first air flow path;   a second heat source located in front of the second air flow path; and   a motor configured to drive the second heat source located in the second air flow path.   
     
     
         10 . The cooking appliance of  claim 1 , further comprising a guide duct in the electric chamber, the guide duct defining a third air flow path, the third air flow path being connected to the exhaust port,
 wherein the cooling fan is located at the guide duct such that air discharged by the cooling fan passes through the third air flow path and then is discharged to an external space through the exhaust port.   
     
     
         11 . The cooking appliance of  claim 1 , wherein the casing includes an upper casing, the upper casing having a connection hole connecting the second air flow path to the electric chamber. 
     
     
         12 . The cooking appliance of  claim 11 , further comprising:
 an upper cover located above the upper casing such that the electric chamber is located between the upper cover and the upper casing, a portion of the upper cover being located above the connection hole; and   a rear cover located at a rear of the casing,   wherein the connection hole is adjacent a rear edge of the upper casing coupled to the rear cover.   
     
     
         13 . The cooking appliance of  claim 12 , wherein the upper cover includes:
 a bent connection part extending in a height direction of the upper cover, the bent connection part having an air in-outflow portion facing the electric chamber, and   a cover plate connected to one end of the bent connection part, the cover plate being located above the connection hole.   
     
     
         14 . The cooking appliance of  claim 1 , further comprising:
 a rear cover; and   a guide duct in the electric chamber,   wherein the casing comprises:
 an inner casing defining the cavity therein; and 
 an outer casing surrounding the inner casing, the outer casing including:
 a bottom casing defining a bottom surface of the outer casing; 
 a rear casing defining a rear surface of the outer casing; and 
 an upper casing defining an upper surface of the outer casing, 
 
   wherein the first air flow path is located in the bottom casing,   wherein the second air flow path is located between the rear casing and the rear cover, and   wherein the guide duct is located at an upper portion of the upper casing, the guide duct defining a third air flow path.   
     
     
         15 . The cooking appliance of  claim 1 , further comprising a heat source located below the cooling fan. 
     
     
         16 . The cooking appliance of  claim 1 , further comprising a side cover defining a side surface of the casing, the side cover having a side spacer protruding outward. 
     
     
         17 . The cooking appliance of  claim 16 , wherein the side cover includes a side through-hole at an upper portion of the side opposite the electric chamber. 
     
     
         18 . The cooking appliance of  claim 17 , wherein the side through-hole is located at a position forward of a center portion of the electric chamber, or
 wherein the side through-hole is located at a position separated from the cooling fan.   
     
     
         19 . The cooking appliance of  claim 1 , further comprising a panel unit located in front of the casing, the panel unit being located above the door,
 wherein the exhaust port is located between the panel unit and the door.   
     
     
         20 . A cooking appliance comprising:
 a casing having a cavity and an electric chamber separated from the cavity, the casing including:
 an inner casing defining the cavity; and 
 an outer casing surrounding the inner casing; 
   a door located at a front of the casing, the door being configured to open and close the cavity;   an exhaust port at a front of the casing;   a cooling fan located in the electric chamber, the cooling fan being configured to suck external air and to discharge air to the exhaust port;   a bottom spacer protruding from a lower portion of the casing to space the casing from a seating surface such that a lower surface of the casing and the seating surface define an intake port; and   a first air flow path located in the lower portion of the casing such that air introduced through the intake port flows to a rear space of the casing.