JP5598255B2 - Induction heating cooker - Google Patents

Description

  The present invention relates to an improvement in cooling efficiency in an induction heating cooker.

  Conventionally, this type of induction heating cooker has a circuit board arranged substantially parallel to the top plate, and a substantially rectangular parallelepiped heat conductor for cooling the heating element on the circuit board is arranged perpendicular to the circuit board. It was.

  In addition, there is a fan that is arranged in a case having openings on the windward and leeward side, in which air is sucked from the fan intake port and a circuit board is arranged on the downstream side of the cooling air (for example, patents) Reference 1).

JP 2009-276014 A

  However, in the conventional configuration, since the area of the circuit board and the occupied area in the main body are substantially equal, it is difficult to enlarge the area of the circuit board in a limited region in the main body.

  Therefore, if the circuit board is rotated so that the rotation axis is substantially parallel to the direction in which the cooling air flows and tilted with respect to the top plate, the heat conductor is a substantially rectangular parallelepiped, so the wall of the air path and the heat conductor There is a problem that a large space is formed between them, and the cooling air flows through the space, so that the cooling air flowing on the surface of the heat conductor is reduced and the cooling efficiency is deteriorated.

  The present invention solves the above-mentioned conventional problems, and an object thereof is to provide an induction heating cooker in which a circuit board is arranged obliquely, cooling efficiency is improved, and arrangement efficiency is also excellent.

  In order to solve the above-described conventional problems, an induction heating cooker according to the present invention includes a main body outline constituting an outline of a main body, a top plate on which an object to be heated provided on the main body is placed, and the top plate A heating coil provided for inductively heating the object to be heated, a fan for blowing cooling air in a direction parallel to the top plate, and a direction in which the cooling air flows and the cooling air flows An air path whose left and right side surfaces are substantially vertical, a circuit board for supplying current to the heating coil, a heating element disposed on the circuit board, and the heating element disposed on the circuit board so as to contact the heating element A heat conductor that radiates and cools the heat of the heating element, and the circuit board rotates with respect to the top plate by rotating about a rotation axis substantially parallel to a direction in which the cooling air flows in the air passage. Tilted and said Comprising a plurality of fins in conductor, the length of the fin, in which a structure formed by changing in correspondence with the distance between the air passage inner wall.

  As a result, the area of the circuit board can be made larger than the area occupied by the circuit board in the main body, so that the area of the circuit board can be enlarged in a limited area in the main body.

In addition, the space between the inner wall of the air passage and the heat conductor is reduced, the cooling air flows along the heat conductor, and the cooling air easily passes between the fins. Can be efficiently cooled.

  As a result, an induction heating cooker having good cooling efficiency and excellent arrangement efficiency can be provided.

  The induction heating cooker of the present invention can provide an induction heating cooker with good circuit board cooling efficiency and excellent arrangement efficiency.

The perspective exploded view of the induction heating cooking appliance in Embodiment 1 of this invention Sectional drawing which looked at the arrangement configuration of the circuit board of the induction heating cooking appliance in Embodiment 1 of this invention from the direction through which cooling air flows Sectional drawing which looked at the arrangement configuration of the induction heating cooking appliance in Embodiment 1 of this invention from the downwind of the direction through which cooling air flows Sectional drawing which looked at the arrangement structure of the induction heating cooking appliance in Embodiment 2 of this invention from the lee of the direction where a cooling air flows Sectional view seen from the direction of cooling air flow in a conventional induction heating cooker Sectional view seen from the direction in which cooling air flows when a conventional circuit board is placed in the air passage at an angle with respect to the top plate

  In order to inductively heat the object to be heated below the top plate, a main body outline constituting the outline of the main body, a top plate on which the object to be heated provided on the main body is placed, A heating coil provided; a fan for blowing cooling air in a direction parallel to the top plate; an air passage in which left and right side surfaces are substantially vertical when viewed from the direction in which the cooling air flows and the cooling air flows; and the heating coil A circuit board that supplies current to the circuit board, a heating element disposed on the circuit board, and a heat conductor that radiates and cools the heat of the heating element disposed on the circuit board so as to contact the heating element The circuit board is disposed in the air passage so as to be inclined with respect to the top plate by rotating about a rotation axis substantially parallel to a direction in which the cooling air flows. A plurality of fins; Of the, in which a structure formed by changing in correspondence with the distance between the air passage inner wall. As a result, the area of the circuit board can be made larger than the area occupied by the circuit board in the main body, so that the area of the circuit board can be expanded in a limited region in the main body. In addition, the space between the inner wall of the air passage and the heat conductor is reduced, the cooling air flows along the heat conductor, and the cooling air easily passes between the fins. It can be cooled efficiently.

  In the second invention, in particular, the fan of the first invention is arranged in a case having a suction port and a blowout port, and a heat conductor is arranged in the vicinity of the rear of the blowout port. Thereby, since the cooling air with a high flow velocity near the outlet can be applied to the heat conductor, the cooling efficiency can be improved.

  In a third aspect of the invention, in particular, in the first or second aspect of the invention, the width of the circuit board is made larger than the width of the air passage as seen from the direction in which the cooling air flows. Thereby, the area of a circuit board will be expanded and the arrangement | positioning efficiency of the said circuit board can be improved.

  In the fourth aspect of the invention, in particular, the air passage of any one of the first to third aspects is configured to be inclined upward or downward substantially parallel to the circuit board. As a result, it is possible to avoid sending cooling air to a space where there is nothing to be cooled, and to effectively use the limited cooling air.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
FIG. 1 is an exploded perspective view of an induction heating cooker according to the first embodiment of the present invention.

  As shown in FIG. 1, a top plate 2 formed of crystallized glass on which an object to be heated such as a pan is placed is provided so as to cover the upper surface of the main body of the induction heating cooker. Except for the upper surface of the main body, the main body outer shell 1 constituting the outer shell is covered, and a heating chamber 21 is provided on the left side of the main body outer shell 1.

  The front surface of the main body shell 1 is provided with an opening 19 connecting the outside and the inside of the main body shell 1 to form an intake port 19, which constitutes a ventilation path leading to the fan 4 arranged on the right front side inside the main body shell 1. Yes.

  The fan 4 is disposed in a fan case 11 having a suction port and a blowout port, and includes a fan blade and a motor that rotates the fan blade.

  On the downstream side of the cooling air blown from the fan 4 behind the fan 4, a circuit board 6 that supplies high-frequency current to the heating coil 3 and is driven and controlled is held by the substrate base 9, and is substantially parallel to the direction in which the cooling air flows. It is rotated by a rotating shaft and is inclined with respect to the top plate 2.

  The upper part of the circuit board 6 is covered with a board cover 10, and the board base 9 and the board cover 10 form an air path 5. Further, an exhaust port 20 serving as an outlet for cooling air is provided in the upper part at the rear of the main body.

  FIG. 2 is a cross-sectional view of the arrangement configuration of the circuit board 6 of the induction heating cooker according to the first embodiment of the present invention as viewed from the direction in which the cooling air flows.

  As shown in FIG. 2, two heat conductors 8 a and 8 b are arranged on the left and right on the circuit board 6. The left heat conductor 8a has such a length that a plurality of fins 16 extend toward the left side surface, and the tips of the fins are positioned in the vicinity of the left side surface.

  On the other hand, the heat conductor 8b on the right side has a plurality of fins 16 extending toward the right side surface, but the upper two fins have such a length that the tips are located in the vicinity of the airway top surface. The tip of the fin is long enough to be located near the right side.

  Further, the lateral width W1 of the circuit board is larger than the lateral width W2 of the air passage.

  FIG. 3 is a cross-sectional view of the arrangement configuration of the induction heating cooker according to the first embodiment of the present invention as viewed from the leeward direction in which the cooling air flows.

  In FIG. 3, the fan 4 is disposed in a fan case 11 having a fan suction port and a fan blowout port 15, and includes a fan blade 12 and a motor 13 that rotates the fan blade 12. In the vicinity of the rear of the fan outlet 15 of the fan 4, a heat generator 7 disposed on the circuit board 6 and a heat conductor 8 disposed to contact the heat generator 7 are disposed.

  In the induction heating cooker configured as described above, the area of the circuit board 6 can be made larger than the area occupied by the circuit board 6 in the main body. Can be enlarged.

  Since the length of the fin 16 is extended to the vicinity of the inner wall of the air passage, the surface area of the heat conductor can be increased and the cooling efficiency can be improved.

  Further, the cooling air is blown out from the fan blowout port 15, hits the heat conductor 8 at a high wind speed, and can be applied to the heat conductor 8 with a fast flow velocity near the fan blowout port 15. Since the distance from the inner wall of the path 5 is kept small, the space between the inner wall of the air path 5 and the heat conductor 8 is reduced, and the cooling air flows along the heat conductor 8 and between the fins 16. However, since the cooling air can easily pass, the cooling efficiency can be improved.

  On the other hand, when the conventional circuit board is tilted with respect to the top plate, a space is generated between the tip of the fin 16 and the inner wall of the air passage 5 as shown in FIG. 6, so that the cooling air mainly passes through this space. Therefore, the cooling air passing through the surfaces of the heat conductors 8a and 8b is small and the cooling efficiency is not good.

  In the present embodiment, the heat conductor 8 is disposed above the circuit board 6 but may be disposed below.

(Embodiment 2)
FIG. 4 shows a cross-sectional view of the arrangement configuration of the induction heating cooker in the second embodiment of the present invention as seen from the direction in which the cooling air flows. Since the basic configuration is the same as that of the first embodiment, only differences will be described.

  As shown in FIG. 4, the lower surface of the substrate base 9 and the upper surface of the substrate cover 10 are provided with an inclination substantially parallel to the circuit board 6. By doing in this way, it can avoid sending cooling air to the space which should not be cooled, and can utilize limited cooling air effectively.

  As described above, since the induction heating cooker according to the present invention can efficiently arrange the heat conductor that cools the circuit board and the heat-generating component, it can also be used for electric appliances that forcibly cool the heat-generating element on the circuit. Applicable.

DESCRIPTION OF SYMBOLS 1 Main body outline 2 Top plate 3 Heating coil 4 Fan 5 Air path 6 Circuit board 7 Heat generating body 8, 8a, 8b Thermal conductor 9 Board base 10 Board cover 11 Fan case 12 Fan blade 15 Fan outlet 16 Fin 19 Inlet 20 exhaust port

Claims (4)

A main body shell constituting an outer shell of the main body, a top plate for placing an object to be heated provided on the upper part of the main body, and a heating coil provided for inductively heating the object to be heated below the top plate; A fan that blows cooling air in a direction parallel to the top plate, an air passage in which the cooling air flows and left and right side surfaces are substantially vertical when viewed from the direction in which the cooling air flows, and a circuit that supplies current to the heating coil A board, a heating element disposed on the circuit board, and a heat conductor that radiates and cools the heat of the heating element disposed on the circuit board so as to contact the heating element,
The circuit board is rotated with a rotation axis substantially parallel to the flow direction of the cooling air in the air passage and is inclined with respect to the top plate, and a plurality of fins are provided on the heat conductor. An induction heating cooker having a configuration in which the length of the fin is changed in accordance with the distance from the inner wall of the air passage. The induction heating cooker according to claim 1, wherein the fan is arranged in a case having an inlet and an outlet, and a heat conductor is arranged in the vicinity of the rear of the outlet. The induction heating cooker according to claim 1 or 2, wherein the width of the circuit board is larger than the width of the air passage as viewed from the direction in which the cooling air flows. The induction heating cooker according to any one of claims 1 to 3, wherein the air passage is configured to be inclined upward or downward substantially parallel to the circuit board.

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