Microwave oven

A microwave oven, comprising:

• a housing having a receiving chamber therein, a left air inlet and a right air inlet being provided at a bottom portion of the housing and an air outlet being provided in the housing;
• an inner case provided in said receiving chamber, a left air channel being formed between a left side wall of said receiving chamber and a left side of said inner case and being in communication with said left air inlet and said air outlet of the housing, a right air channel being formed between a right side wall of said receiving chamber and a right side of said inner case and being in communication with said right air inlet and said air outlet of the housing;
• and
• a left fan and a right fan, said left fan being provided in the left air channel and said right fan being provided in the right air channel, the left fan and the right fan each including a front impeller, a rear impeller and a driving motor, wherein at least one of the front impeller and the rear impeller is adjacent to at least one of a front wall and a rear wall of said receiving chamber which is corresponding thereto, said at least one of the front impeller and the rear impeller is spaced from the driving motor at a predetermined distance;
• wherein said front impeller is spaced from said front wall of the receiving chamber at a first predetermined distance,
• said rear impeller is adjacent to said rear wall of the receiving chamber,
• said rear impeller is spaced from said driving motor at a second predetermined distance,
• wherein a first front air inlet is provided in a front end surface of the front impeller, and a first rear air inlet is provided in a rear end surface of the front impeller,
• a second front air inlet is provided in a front end surface of the rear impeller,
• said left air inlet and said right air inlet are adjacent to said front wall of the receiving chamber.

A microwave oven, comprising:

• a housing having a receiving chamber therein, a left air inlet and a right air inlet being provided at a bottom portion of the housing and an air outlet being provided in the housing;
• an inner case provided in said receiving chamber, a left air channel being formed between a left side wall of said receiving chamber and a left side of said inner case and being in communication with said left air inlet and said air outlet of the housing, a right air channel being formed between a right side wall of said receiving chamber and a right side of said inner case and being in communication with said right air inlet and said air outlet of the housing;
• and
• a left fan and a right fan, said left fan being provided in the left air channel and said right fan being provided in the right air channel, the left fan and the right fan each including a front impeller, a rear impeller and a driving motor, wherein at least one of the front impeller and the rear impeller is adjacent to at least one of a front wall and a rear wall of said receiving chamber which is corresponding thereto, said at least one of the front impeller and the rear impeller is spaced from the driving motor at a predetermined distance;
• said front impeller is adjacent to the front all of the receiving chamber,
• said front impeller is spaced from said driving motor at a third predetermined distance,
• said rear impeller is spaced from said rear wall of the receiving chamber at a fourth predetermined distance,
• wherein a first rear air inlet is provided in a rear end surface of the front impeller,
• a second front air inlet is provided in a front end surface of the rear impeller, and
• a second rear air inlet is provided in a rear end surface of the rear impeller;
• said left air inlet and said right air inlet are adjacent to the rear wall of said receiving chamber.