Electric rice pressure cooker and pressure cooker without a rubber packing

An electric rice pressure cooker without a rubber packing, the pressure cooker comprising:

• a main body case which has an open top;
• an inner pot which is provided inside the main body case;
• and
• a cover which is hinge-coupled to the main body case and disposed to cover the open top of the main body case,
• wherein the inner pot comprises:
• a plurality of flange portions provided on a top portion of the inner pot at predetermined intervals along a circumferential direction of the inner pot;
• and
• a tapered sloped surface formed on the top end of the inner pot, and the cover comprises:
• a sealing member which has a circular hole in the center thereof and is seated on the inner pot, and has a bottom surface which is seated on and contacts the inner pot, and is formed to correspond to the top end of the inner pot;
• and
• an inner cover which has a receiving space therein in which the sealing member moves vertically and the inner surface of the receiving space is configured to maintain a tight seal with the peripheral end portion of the sealing member, and
• the sloped surface of the inner pot is tapered toward outside, and
• the sealing member has a bent portion so as to contact the sloped surface of the inner pot and the inner surface of the inner cover, and
• a part of the bent portion contacting the sloped surface is formed as a sealing surface which corresponds in shape to the sloped surface so that steam generated during cooking passes through the circular hole and presses the sealing member downwards to maintain a tight seal with the inner pot.

An electric rice pressure cooker without a rubber packing, the pressure cooker comprising:

• a main body case which has an open top;
• an inner pot which is provided inside the main body case;
• and
• a cover which is hinge-coupled to the main body case and disposed to cover the open top of the main body case,
• wherein the inner pot comprises a plurality of flange portions disposed along a circumferential direction on the outer circumference surface of the top portion of the inner pot, and
• the cover comprises:
• a sealing member which has on the peripheral portion of the sealing member a sealing protrusion protruding downwards so as to contact the top surface of the inner pot, and has at the center a hole penetrating the sealing member between the top surface and the bottom surface of the sealing member;
• and
• an inner cover which guides the sealing member so that the sealing member moves vertically and which is position-fixed on the flange portions by a lock rotation body, and
• a sealing space in which steam flowing in through the hole of the inner cover is sealed off from the outside is provided between the sealing member of the inner cover, and
• when steam is generated inside the inner pot, the sectional area of the top surface of the sealing member which the steam flowing into the sealing space through the hole contacts is greater than the sectional area of the bottom surface of the sealing member which the steam contacts, thus allowing the steam to press the sealing protrusion of the sealing member onto the top surface of the inner pot.

A pressure cooker without a rubber packing, comprising:

• a pressure pot which has an open top, and in which grains required to be cooked are placed and a plurality of flanges are provided on the top end of the pressure pot along the circumferential direction at predetermined intervals;
• a locking rotation body which rotates with respect to the pressure pot and is selectively locked into the flanges;
• a sealing member in which a sealing surface capable of contacting the top end of the pressure pot is provided on the peripheral of the sealing member, and a hole penetrating the sealing member between the top surface and bottom surface of the sealing member is formed to allow steam generated from the pressure pot to be discharged to the above the sealing member;
• an inner cover which guides the sealing member in order for the sealing member to move vertically, and has a sealing space between the inner cover and the sealing member where steam generated from the pressure pot is filled, and is position-fixed in the locking rotation body;
• and
• a position moving unit which allows position movement of the sealing surface of the sealing member according to rotation of the locking rotation body between a first position where the sealing surface of the sealing member contacts the top end of the pressure pot and a second position where the sealing surface of the sealing member is separated from the top end of the pressure pot.