# US 11,452,181 B2 · Induction cooktop with an exhaust air guide

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- Number: US 11,452,181 B2
- Document ID: US11452181B2
- Status: Granted
- Kind: B2
- Application number: 16/636,954
- Filed: 2017-09-13
- Published: 2020-11-26
- Granted: 2022-09-20
- Earliest claimed: 2017-09-13
- Assignees: Mitsubishi Electric Corporation
- Applicants: Mitsubishi Electric Corporation
- Inventors: Akihiko Kobayashi; Akira Shiga; Sota Komae
- Web page: https://patentgrep.com/patent/US11452181B2

## CPC

- H05B 6/1263: {using coil cooling arrangements}
- F24C 15/006: {Arrangements for circulation of cooling air}
- H05B 2206/022: Special supports for the induction coils
- H05K 7/20145: {Means for directing air flow, e.g. ducts, deflectors, plenum or guides}
- H05B: ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- F24C: DOMESTIC STOVES OR RANGES (exclusively for solid fuels F24B); DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
- H05K: PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS

## Abstract

A heating cooker includes a housing having an exhaust aperture; a top plate on the housing with a heating zone; a heating coil to perform induction heating to heat a heating target on the heating zone; an air-sending device; a cooling air guide having an air outlet, to guide air from the air-sending device to the air outlet; and an exhaust air guide aperture with an air passage extending from a first inlet to a first outlet. The air outlet and the exhaust aperture are aligned with each other and the air outlet of the cooling air guide and the heating coil are aligned each other, both in the front and back direction. The air outlet is arranged on a front side relative to a center of the heating coil. The air passage of the exhaust air guide has a longer length than the first outlet of the air passage.

## Claims

### Claim 1

A heating cooker comprising:
a housing having an exhaust aperture formed on an upper surface thereof, the housing having a front side, a back side opposite the front side, a left side between the front side and the back side, and a right side between the front side and the back side and opposite the left side;
a top plate disposed on the housing, and provided with a heating zone disposed, in plan view, closer to the front side of the housing relative to the exhaust aperture;
an induction heating coil configured to perform induction heating to heat a heating target placed on the heating zone;
an air-sending device;
a cooling air guide having an air outlet, and configured to guide an air flow from the air-sending device to the air outlet; and
an exhaust air guide disposed over the exhaust aperture, the exhaust air guide being formed with an air passage, a first inlet, a first outlet, and a second outlet, the air passage extending from the first inlet to the first outlet located above the first inlet,
in plan view, the air outlet of the cooling air guide and the exhaust aperture being aligned with each other in a front and back direction running between the front side and the back side of the housing,
in plan view, the air outlet of the cooling air guide and the induction heating coil being aligned with each other in the front and back direction,
in plan view, the air outlet of the cooling air guide being arranged on a front side of a center of the induction heating coil closest to the front side of the housing,
the air passage of the exhaust air guide having a length longer than a length of the first outlet of the air passage in the front and back direction,
the second outlet being formed closer to the back side of the housing with respect to the first outlet, and having a second direction of opening that opens in a direction different from a first direction of opening of the first outlet,
the exhaust air guide being configured to divide an air flow flowing out from the exhaust aperture into an air flow flowing in the first outlet and an air flow flowing in the second outlet.

### Claim 2 (depends on 1)

The heating cooker of claim 1, wherein a center of the first outlet of the air passage of the exhaust air guide in the front and back direction is positioned on a front side of a center of the first inlet of the air passage of the exhaust air guide in the front and back direction.

### Claim 3 (depends on 1)

The heating cooker of claim 1, wherein, when the air-sending device operates, an air speed of an air flow flowing out from the second outlet is lower than an air speed of an air flow flowing out from the first outlet.

### Claim 4 (depends on 1)

The heating cooker of claim 1, wherein an axis of the air passage of the exhaust air guide is tilted forward with respect to the front side of the housing relative to a vertical line in a range greater than 0 degrees and less than or equal to 35 degrees.

### Claim 5 (depends on 1)

The heating cooker of claim 1, wherein a rectifying plate is disposed, in plan view, at a position where at least a part of the rectifying plate overlaps the first inlet of the exhaust air guide in an up and down direction.

### Claim 6 (depends on 1)

The heating cooker of claim 1, further comprising:
a back air guide wall disposed below and behind the first inlet, the back air guide wall guiding upward an air flow moving from front to back.

### Claim 7 (depends on 6)

The heating cooker of claim 6, further comprising:
a front air guide wall disposed below the first inlet and apart from the back air guide wall on a front side relative to the back air guide wall,
wherein a flat surface of the back air guide wall and a flat surface of the front air guide wall are opposite to each other, and
wherein the first inlet is disposed closer to the back air guide wall than to the front air guide wall.

### Claim 8 (depends on 1)

The heating cooker of claim 1, wherein among lengths of walls forming the air passage of the exhaust air guide, the length of a rearmost wall, with respect to the back side of the housing, along an axis of the air passage is longest.

### Claim 9 (depends on 1)

The heating cooker of claim 1, wherein, in a left and right direction of the housing running between the left side and the right side of the housing, the first outlet is provided between a left end of the heating zone closer to the left side of the housing and a right end of the heating zone closer to the right side of the housing.

### Claim 10 (depends on 1)

The heating cooker of claim 1, wherein, in a left and right direction of the housing running between the left side and the right side of the housing, a center of the heating zone is disposed between a left end of the first outlet closer to the left side of the housing and a right end of the first outlet closer to the right side of the housing.

### Claim 11 (depends on 1)

The heating cooker of claim 1, further comprising:
an air guide plate disposed on an upstream side of the first inlet and on a front side relative to a rear end portion of the first inlet,
wherein a flat surface of the air guide plate is tilted forward relative to a vertical line,
wherein an axis of the air passage of the exhaust air guide is tilted forward relative to the vertical line, and
a tilt angle of the flat surface of the air guide plate is larger than a tilt angle of the axis of the air passage of the exhaust air guide.