Heating cooker

Patent metadata

Field	Value
Publication number	US-10154548-B2
Application number	US-201515023598-A
Country	US
Kind code	B2
Filing date	Feb 23, 2015
Priority date	Aug 31, 2010
Publication date	Dec 11, 2018
Grant date	Dec 11, 2018

Abstract

A heating cooker includes a body casing, a heating chamber, a magnetron that supplies microwaves into the heating chamber, a cooling fan that delivers cooling air flow to the magnetron, an air discharge duct that is for discharging discharge air from inside of the heating chamber to outside, a first guiding channel that guides into the heating chamber a portion of the cooling air flow from the cooling fan which has flowed out to a downstream side after cooling the magnetron, and a second guiding channel that guides toward the air discharge duct another portion of the cooling air flow from the cooling fan which has flowed out to the downstream side after cooling the magnetron.

First claim

The invention claimed is:

1. A heating cooker comprising:
a body casing,
a heating chamber that is placed in the body casing,
a magnetron that is placed in the body casing and that supplies microwaves into the heating chamber,
a cooling fan that is placed in the body casing and that delivers cooling air flow to the magnetron,
an air discharge duct that is for discharging discharge air from inside of the heating chamber to outside, wherein the air discharge duct causes the discharge air discharged from the heating chamber and the cooling air flow guided by the second guiding channel to be mixed therein and to be discharged to the outside,
a first guiding channel that guides into the heating chamber a portion of the cooling air flow from the cooling fan which has flowed out to a downstream side after cooling the magnetron, and
a second guiding channel that guides toward the air discharge duct another portion of the cooling air flow from the cooling fan which has flowed out to the downstream side after cooling the magnetron.

2. The heating cooker as claimed in claim 1 , further comprising
a third guiding channel that guides a portion of the cooling air flow from the cooling fan so that the portion blows off toward a front face side in the body casing without passing through a cooling channel in the magnetron.

3. The heating cooker as claimed in claim 2 , further comprising
air intake ports provided on the front face side of the body casing, wherein
the cooling fan sucks outside air from the front face side through the air intake ports.

4. The heating cooker as claimed in claim 2 , wherein,
in an air discharge path for discharge from the air discharge duct to the outside, the cooling air flow guided by the third guiding channel is made to flow into the air discharge duct on an upstream side of a position where the cooling air flow from the second guiding channel flows into the air discharge duct.

5. The heating cooker as claimed in claim 1 , comprising
air intake ports provided on a front face side of the body casing, wherein
an air discharge port on a downstream side in the air discharge duct is provided on the front face of the body casing so that the discharge air mixed in the air discharge duct blows off toward a side opposed to the air intake ports.

6. The heating cooker as claimed in claim 1 , further comprising
an ejector part that is provided in the air discharge duct and that is for drawing the discharge air from the inside of the heating chamber into the air discharge duct by the cooling air flow flowing into the air discharge duct under guidance of the second guiding channel.

7. The heating cooker as claimed in claim 1 , further comprising
a blower duct that guides the cooling air flow from the cooling fan into a cooling channel in the magnetron.

8. The heating cooker as claimed in claim 1 , further comprising
air discharge fans provided on a rear face side of the air discharge duct, and
inclined members provided at positions where the cooling air flow from the first guiding channel or the second guiding channel flows into the air discharge duct, wherein
the inclined members extend to positions facing front face sides of the air discharge fans.

9. The heating cooker as claimed in claim 1 , further comprising
a guiding part that guides dew condensation water, accumulated in a bottom part of the air discharge duct, into the second guiding channel.

10. The heating cooker as claimed in claim 2 , wherein
an air curtain is formed on a front face side in the body casing 1 by a portion of the cooling air flow guided by the third guiding channel form the cooling fan.

Assignees

• Sharp Kk

Inventors

• Nishijima Masahiro
• Asami Shinji
• Katabe Masaki

Classifications

• H05B6/642 Primary

  Cooling of the microwave components and related air circulation systems (H05B6/6473 takes precedence) · CPC title