Induction cooking appliance

Patent metadata

Field	Value
Publication number	US-9241374-B2
Application number	US-201113393489-A
Country	US
Kind code	B2
Filing date	Mar 14, 2011
Priority date	Mar 17, 2010
Publication date	Jan 19, 2016
Grant date	Jan 19, 2016

Abstract

To reduce the air exhausted to outside a main body after cooling a heat generating component from being taken in again from an intake port. The flow of cooling wind cooled the heat generating component is discharged from an exhaust port at other than a first peripheral wall with the flow bent inside the main body. When rectified inside the main body and discharged from the exhaust port, the cooling wind grows to a flow speed of a certain extent to become an exhaust air that a flowing direction is clearly defined, so that it is less likely to be taken in again from the intake port, it is less likely to be subjected to the influence of obstacles of the exhaust port, use can be made in a kitchen cabinet of the intake and exhaust air at the back side, and it is satisfactory and is less likely to be damaged without involving sense of unpleasantness by the exhaust air to the user.

First claim

The invention claimed is:

1. An induction cooking appliance comprising:
a heating coil arranged below a top plate for mounting a to-be-heated object so as to inductively heat the to-be-heated object;
a control circuit that includes a heat generating component for generating and controlling a high frequency current to supply to the heating coil;
a blower device for drawing air from an intake port and for directing a cooling wind over the control circuit; and
a main case that includes a plurality of side surface walls and a bottom surface plate, wherein the heating coil, the control circuit, and the blower device are arranged within the main case,
wherein a first side surface wall of the plurality of side surface walls is arranged perpendicular to a direction in which the cooling wind flows over the control circuit to thereby cause the direction of the cooling wind to change so as to flow along the first side surface and towards an exhaust port arranged below the top plate on a portion of the main case other than the first side surface wall so that substantially all the cooling wind flows in a direction different from the direction in which the cooling wind flows over the control circuit as the cooling wind exits the main case.

2. The induction cooking appliance according to claim 1 , wherein
the plurality of side surface walls include a second side surface wall that extends perpendicularly from the first side surface wall to thereby change the direction of the cooling wind so that the cooling wind flows in a direction opposite to the direction in which the cooling wing flows over the control circuit as the cooling wind exits the main case.

3. The induction cooking appliance according to claim 1 , wherein the exhaust port is formed in a side surface wall that is connected to the first side surface wall via a bent portion.

4. The induction cooking appliance according to claim 1 , wherein
a sub-case having an upper side opened is accommodated in an internal space of the main case, the control circuit and the blower device being arranged inside the sub-case; and
a first exhaust flow path is formed between the first side surface wall and a side surface wall of the sub-case facing the first side surface wall, and is formed inside the internal space so that the cooling wind after cooling the control circuit contacts the side surface wall and flows in a constant direction through the first exhaust flow path.

5. The induction cooking appliance according to claim 4 , wherein a second exhaust flow path that is orthogonal with the first exhaust flow path is in communication with the first exhaust flow path so as to discharge from the exhaust port that is formed in an internal space of the main case.

6. The induction cooking appliance according to claim 4 , wherein an operation portion is arranged on a front surface side in the of the main case; and
the first exhaust flow path is arranged on a lower side of the operation portion.

7. The induction cooking appliance according to claim 4 , wherein a coil base for holding the heating coil and a radiator plate for mounting the coil base are arranged above the sub-case in the internal space of the main case, one part of an upper surface in a flow path, through which the cooling wind from the blower device passes to cool the control circuit, being configured by the radiator plate.

8. The induction cooking appliance according to claim 4 , wherein a flow path guiding plate having a surface inclined in a flowing direction of the cooling wind for cooling the control circuit is arranged at an opening of the sub-case so that the cooling wind flows along the first exhaust flow path when the cooling wind after cooling the control circuit passes through an opening formed in a side surface wall of the sub-case to flow to the first exhaust flow path.

9. The induction cooking appliance according to claim 4 , wherein in the internal space of the main case, the exhaust port is formed at a position symmetric with respect to a center line in which a center axis is a front and back direction, one part of the cooling wind guided to the first exhaust flow path after cooling the control circuit is discharged from one exhaust port, and the remaining cooling wind is discharged from the other exhaust port.

10. The induction cooking appliance according to claim 9 , wherein
the main case includes a second side surface wall and a third side surface wall connected to the first side surface wall via a bent portion; and
the cooling wind that flows along the first exhaust flow path configured by the first side surface wall flows along a second exhaust flow path configured by the second side surface wall and a third exhaust flow path configured by the third side surface wall to be exhausted from a first exhaust port communicating to the second exhaust flow path and a second exhaust port communicating to the third exhaust flow path.

11. The induction cooking appliance according to claim 1 , wherein the first side surface wall includes a vent hole, wherein a portion of the cooling wind, after cooling the control circuit, is discharged from the vent hole.

12. The induction cooking appliance according to claim 1 , wherein
an induction heating block including the heating coil, the control circuit, and the blower device is arranged in plurals below the top plate;
a flowing direction of a cooling wind for cooling the respective control circuit is the same in the respective induction heating block, and the induction heating blocks are arranged side by side inside the main case so that the cooling wind after cooling the respective control circuit contacts the first side surface wall; and
the cooling wind that contacts the first side surface wall flows along the first side surface wall so as to be exhausted from the exhaust port.

13. The induction cooking appliance according to claim 12 , wherein the main case includes a second side surface wall connected to the first side surface wall such that a discharging direction of the cooling wind from the exhaust port flows in a direction of regressing a flowing direction of the cooling wind for cooling the control circuit in the respective induction heating block, and the cooling wind that flows along the first side surface wall flows in a constant direction along the second side surface wall.

14. The induction cooking appliance according to claim 13 , wherein
each of the induction heating block is accommodated in a plurality of sub-cases having the upper side opened in an internal space of the main case;
a flowing direction of the cooling wind flowing along the first side surface wall is parallel to an arranged direction of the plurality of sub-cases arranged side by side; and
a flowing direction the of cooling wind flowing along the second side surface wall is orthogonal to the arranged direction of the plurality of sub-cases arranged side by side.

15. The induction cooking appliance according to claim 12 , wherein the cooling wind that flows along the first side surface wall flows through an exhaust flow path formed in a space between the plurality of induction heating blocks arranged side by side so as to be discharged from the exhaust port.

16. The induction cooking appliance according to claim 14 , wherein the cooling wind that flows along the first side surface wall flows through an exhaust flow path formed in both spaces between the induction heating blocks on both sides of the plurality of induction heating blocks arranged side by side and the main case so as to be discharged from two exhaust ports.

17. The induction cooking

Assignees

• Matsui Eiji
• Kataoka Akira
• Shigeoka Takehiko
• Kusaka Takaaki
• Ogawa Kenji
• Panasonic Ip Man Co Ltd

Inventors

• Matsui Eiji
• Kataoka Akira
• Shigeoka Takehiko
• Kusaka Takaaki
• Ogawa Kenji

Classifications

• H05B6/1263 Primary

  using coil cooling arrangements · CPC title

• H05B2206/022

  Special supports for the induction coils · CPC title