JP2013054857A - Induction heating cooker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an induction heating cooker which efficiently cools a control board, a heating coil, and the like without separating the air quantity of cooling air from a fan unit.SOLUTION: An induction heating cooker includes a fan unit 9 having: a fan case which has upper and lower discharge ports, connected with a substrate case 10, at the opposite side of a fan housing part, where upper and lower suction ports are provided in a vertical direction, and a rear surface plate of a cooker body 1, and also has the fan housing part forming an air channel connecting with an intake port, with the rear surface plate and a bottom plate; a motor which is provided in the upper suction port; and a sirocco fan which is provided in the fan housing part, and suctions cooling air from the intake port into the air channel by driving of the motor, the sirocco fan suctioning a larger quantity of the cooling air from the lower suction port than from the upper suction port of the fan housing part and sending the cooling air from the upper and lower discharge ports to the substrate case 10. Control boards 101, 102, and 103 in the substrate case 10 are formed so that the height of the leftmost control substrate 101 is the lowest and the control boards gradually get higher towards the right side.

Description

  The present invention relates to an induction heating cooker in which a pan or the like placed on a top plate is induction-heated by a heating coil to cook a food in the pan.

  As a conventional induction heating cooker, a control board for driving two heating coils and a cooling fan are provided, and after cooling the control board with a part of the cooling air from the fan, one heating coil is cooled. However, some of the other cooling air emitted from the fan cools the other heating coil via a duct (see, for example, Patent Document 1).

JP 2007-184287 A (Abstract, FIG. 9)

  In the above-described conventional induction heating cooker, after cooling the control board with a part of the cooling air from the fan, one heating coil is cooled, and the other part with the other cooling air from the fan. Since the heating coil is configured to be cooled, the air volume of the cooling air is diverted, and it cannot be said that the cooling efficiency is good.

  The present invention has been made to solve the above-described problems, and induction heating cooking that can efficiently cool the control board, the heating coil, and peripheral components without diverting the air volume of the cooling air from the fan unit. The purpose is to provide a vessel.

  An induction heating cooker according to the present invention includes a cooker body, a top plate provided at the top of the cooker body, an intake port and an exhaust port provided behind the top plate in the cooker body, and a top plate. A heating coil installed underneath, a board case having a plurality of control boards installed in an upright state inside the cooker body, and a board case installed under the heating coil. A coil cooling duct connected to the outside, and taking outside air as cooling air from the intake port and sucking it, discharging the sucked cooling air into the board case to cool the control board, and passing the board case through the coil cooling duct And a fan unit that cools the heating coil and surrounding components, and the fan unit has a fan housing portion in which an upper suction port and a lower suction port are provided above and below in the vertical direction. Furthermore, it has an upper discharge port and a lower discharge port connected to the side surface of the substrate case on the opposite side of the back plate of the cooker body, and forms an air passage connected to the intake port with the back plate and the bottom plate of the cooker body. A fan case is provided in the upper suction port of the fan housing part with a gap, and a motor whose rotating shaft is directed to the bottom plate side, and is provided in the fan housing part. And a fan that sucks a larger amount of cooling air from the lower suction port than the upper suction port of the fan housing and discharges each cooling air from the upper discharge port and the lower discharge port into the substrate case. Among the control boards in the board case, the height of the control board on the side of the heating coil is the lowest, and gradually increases as the distance from the heating coil increases.

  According to the present invention, the air volume of the cooling air discharged from the fan unit into the substrate case is increased in the lower discharge port than in the upper discharge port, and the control substrates in the substrate case are sequentially increased from the left side. Therefore, in the board case, the cooling air flows from the bottom to the top and flows toward the control board having a low height. Thereby, the inflow of the cooling air into the coil cooling duct is improved, and accordingly, the amount of cooling air blown upward from the coil cooling duct is increased. Therefore, each control board, heating coil, and peripheral components in the board case can be efficiently cooled.

The top view which shows the state which removed the top plate in the induction heating cooking appliance which concerns on embodiment. The top view of the induction heating cooking appliance which removes and shows the heating coil of FIG. Sectional drawing which cut | disconnects and shows the fan unit side among the sides of the induction heating cooking appliance of FIG. FIG. 4 is an external perspective view of the fan unit shown in FIG. 3. The perspective view which decomposes | disassembles and shows a fan unit to the vertical direction. The perspective view of the duct for coil cooling shown in FIG. 2, a board | substrate case, and a control board. The top view which shows the modification of the control board arrange | positioned at the board | substrate case of FIG.

  FIG. 1 is a plan view showing a state in which the top plate is removed from the induction heating cooker according to the embodiment, and FIG. 2 is a plan view of the induction heating cooker shown with the heating coil of FIG. 1 removed.

  As shown in FIG. 1, the induction heating cooker of the present embodiment includes a left heating coil 2 and a right heating coil 3 that are disposed laterally at the front portion of the cooking appliance body 1, and left and right heating coils 2. A central heating coil 4 disposed at the rear of the cooker body 1 at the center of 3, a grill 6 having a heater inside and disposed below the left heating coil 2 and the central heating coil 4 through a horizontal partition plate 5. It has. Also, an exhaust port 7 and an intake port 8 provided laterally at the rear of the cooker body 1, a fan unit 9 disposed on the intake port 8 side, and a substrate case 10 disposed in front of the fan unit 9, The coil cooling duct 11 is provided. In FIG. 1, only the cover case 91 of the fan unit 9 is visible. Moreover, although not shown in this figure, it has the top plate 14 (refer FIG. 3) which covers the surface except the exhaust port 7 and the intake port 8 among the upper surfaces of the cooking appliance main body 1. FIG.

  The left heating coil 2 includes, for example, a ring-shaped inner coil 2a, a ring-shaped middle coil 2b installed with the center of the inner coil 2a being the same, and four deformations arranged circumferentially on the outer periphery of the middle coil 2b. Ring-shaped outer coil 2c. The left heating coil 2 is provided on a plurality of ferrites 2d extending radially from the center with the center of the inner coil 2a being the same. In addition, the structure of the above-mentioned left heating coil 2 is an example, Comprising: It is not limited to this.

  The right heating coil 3 includes, for example, a ring-shaped inner coil 3a and a ring-shaped outer coil 3b installed with the center of the inner coil 3a being the same. Similar to the left heating coil 2, the right heating coil 3 is provided on a plurality of ferrites 3c extending radially from the center with the center of the inner coil 3a being the same. The central heating coil 4 is formed on a plurality of ferrites 4a that are formed in a ring shape and extend radially from the central portion. Instead of the central heating coil 4, a radiant heater may be used.

  The coil cooling duct 11 is installed on the horizontal partition plate 5 and is provided below the left coil cooling duct 12 provided below the left heating coil 2 and the right heating coil 3, as shown in FIG. And a right coil cooling duct 13. The right coil cooling duct 13 is connected to the upper opening 10a of the substrate case 10 at a substantially right half when the cooker body 1 is viewed from the front. A plurality of outlets 12a and 13a are provided in the circumferential direction on the upper surfaces of the left and right coil cooling ducts 12 and 13, respectively.

Next, the configuration of the fan unit 9 will be described with reference to FIGS.
3 is a cross-sectional view of the side of the induction heating cooker of FIG. 1 cut off the fan unit side, FIG. 4 is an external perspective view of the fan unit shown in FIG. 3, and FIG. 5 is an exploded vertical view of the fan unit It is a perspective view shown.
3 to 5, the fan unit 9 includes a lid case 91, a fan case 92, a motor 93, and a sirocco fan 94.

  As shown in FIGS. 4 and 5, the fan case 92 includes an upper case 92a and a lower case 92b. The fan case 92 forms an air passage 95 connected to the air inlet 8 with the back plate 1a and the bottom plate 1b of the cooker body 1, and the upper discharge port 92c connected to the side surface of the substrate case 10 on the opposite side of the back plate 1a. And a lower discharge port 92d. The fan case 92 is provided with a fan housing portion 96 having an upper suction port 96b and a lower suction port 96d having substantially the same size in the vertical direction. The fan housing portion 96 is formed in a substantially arc shape on the above-described air passage 95 side.

  The upper discharge port 92 c and the lower discharge port 92 d are divided by a partition plate 96 a provided in the fan housing portion 96 along the outer periphery of the sirocco fan 94. The lower discharge port 92d has a smaller opening than the upper discharge port 92c by the partition plate 96a. The partition plate 96a is held between the upper case 92a and the lower case 92b.

  The motor 93 is provided in the upper suction port 96b of the fan housing portion 96 with the rotation shaft directed toward the bottom plate 1b, and is screwed to the peripheral portion 96c provided on the upper portion of the fan housing portion 96 via a holding member 93a. It is fixed at 93b. By inserting the motor 93, the upper suction port 96b of the fan housing portion 96 is structured to suck less cooling air than the lower suction port 96d.

  The sirocco fan 94 is provided with a circular shielding plate 94a at the same height as the partition plate 96a. A rotating shaft 93c of a motor 93 is attached to the shielding plate 94a. The height of the sirocco fan 94 in the axial direction is equal to or less than the total height of both the upper discharge port 92c and the lower discharge port 92d. The lid case 91 is provided above the fan case 92 with a motor 93 and a gap.

  The above-described upper suction port 96b communicates with the upper discharge port 92c by a shielding plate 94a in the sirocco fan 94 and a partition plate 96a provided along the outer periphery of the sirocco fan 94. The lower suction port 96d communicates with the lower discharge port 92d by the shielding plate 94a and the partition plate 96a as described above.

Next, the substrate case 10 will be described with reference to FIG.
6 is a perspective view of the coil cooling duct, the substrate case, and the control substrate shown in FIG.
The substrate case 10 has an outer appearance formed in a rectangular parallelepiped shape, and has an upper opening 10a at the top. The upper opening 10a is covered with the right coil cooling duct 13 of the coil cooling duct 11, and the side surface on the fan unit 9 side is connected to the upper discharge port 92c and the lower discharge port 92d of the fan unit 9. As a result, the fan unit 9, the substrate case 10, and the coil cooling duct 11 are connected to each other, and an air passage through which the cooling air from the fan unit 9 passes is formed.

  In the substrate case 10, for example, three control substrates 101, 102, and 103 are arranged in the width direction when the cooker body 1 is viewed from the front. The control boards 101, 102, and 103 are fixed in an upright state, have substantially the same depth, and have different heights. For example, among the three control boards 101, 102, 103, the left control board 101 has the lowest height when the cooker body 1 is viewed from the front, and the central control board 102 has a height higher than that of the left control board 101. The right control board 103 is formed higher than the central control board 102.

  The left control board 101 is a board for energizing and controlling the central heating coil 4 that is less frequently used, and the central control board 102 is a board for energizing and controlling the right heating coil 3 and the right control board. Reference numeral 103 denotes a substrate for controlling energization of the left heating coil 2.

In the induction cooking device configured as described above, the flow of cooling air by the operation of the fan unit 9 will be described.
When the motor 93 of the fan unit 9 is driven by using the cooker body 1, the sirocco fan 94 rotates together with the shielding plate 94a. At this time, outside air is taken into the air path 95 from the air inlet 8 as cooling air. A part of the taken-in cooling air is sucked into the upper suction port 96b of the fan storage unit 96, and the remaining cooling air is sucked into the lower suction port 96d of the fan storage unit 96.

  The air volume of the cooling air sucked into the upper suction port 96b is such that the space between the cover case 91 and the upper portion of the fan housing portion 96 is narrow, and the motor 93 is inserted into the upper suction port 96b. The air volume of the cooling air sucked into the lower suction port 96d is smaller. The ratio of the air volume is, for example, 3 for the upper suction port 96b and 7 for the lower suction port 96d. ing. Note that the ratio of the air volume is not limited, and may be 4: 6 or 2: 8, for example.

  The cooling air sucked into the upper suction port 96 b is guided to the upper discharge port 92 c side of the fan case 92 by the shielding plate 94 a in the sirocco fan 94 and the partition plate 96 a in the fan storage portion 96, and the inside of the substrate case 10. Discharged. The cooling air sucked into the lower suction port 96d is guided to the lower discharge port 92d side of the fan case 92 by the shielding plate 94a and the partition plate 96a, and is discharged into the substrate case 10.

  In the substrate case 10, cooling air from the upper discharge port 92 c and the lower discharge port 92 d flows through the space between the control substrates 101 and 102 and the space between the control substrates 102 and 103 as air paths. In that case, since the cooling air flowing in from the lower discharge port 92d has a larger air volume than the cooling air flowing in from the upper discharge port 92c, and the momentum is good, the cooling air from the lower discharge port 92d is cooled on the upper discharge port 92c side. Turns upward while attracting air. Then, the cooling air between the control boards 102 and 103 changes direction toward the control board 102 having a lower height, and the cooling air between the control boards 101 and 102 also moves toward the control board 101 having a lower height. The direction is changed to flow into the upper coil cooling duct 11.

  The cooling air that has flowed into the coil cooling duct 11 is jetted upward from a plurality of outlets 13 a provided in the right coil cooling duct 13 to cool the right heating coil 3, and the top plate 14 and the horizontal partition plate 5 While flowing in the space between them, the peripheral parts are cooled and flow to the exhaust port 7 side. The remaining cooling air is sent into the left coil cooling duct 12 and is jetted upward from the plurality of ejection openings 12a to cool the left heating coil 2 and between the top plate 14 and the horizontal partition plate 5 in the same manner as described above. The peripheral parts are cooled while flowing into the space, and flow toward the exhaust port 7.

  As described above, according to the embodiment, the air volume of the cooling air discharged from the fan unit 9 into the substrate case 10 is increased in the lower discharge port 92d than in the upper discharge port 92c. Since the control boards 101, 102, and 103 are made higher in order from the left end, the cooling air flows from the bottom to the top in the board case 10 and also flows toward the control boards 101 and 102 having a lower height. . Thereby, the inflow of the cooling air into the coil cooling duct 11 is improved, and accordingly, the amount of cooling air blown upward from the left coil cooling duct 12 and the right coil cooling duct 13 is increased. Therefore, the control boards 101, 102, 103, the left and right heating coils 2, 3 and the peripheral components in the board case 10 can be efficiently cooled.

  In addition, since the control boards 101, 102, 103, the left and right heating coils 2, 3 and peripheral components in the board case 10 can be efficiently cooled, the life of the induction heating cooker can be extended. . In addition, since the induction heating cooker has the control boards 101, 102, 103 accommodated in one substrate case 10, the induction heating cooker itself can be reduced in size, and compared with the assembly of two substrate cases in the production process. Production becomes easy. Further, since only one cooling motor is required as compared with the above-described conventional technique, power consumption can be reduced.

  In the present embodiment, it has been described that the control boards 101, 102, 103 are made higher in order from the left end so that the cooling air in the board case 10 efficiently flows into the coil cooling duct 11. However, the present invention is not limited to this, and control boards 101, 102, and 103 as shown in FIG.

FIG. 7 is a plan view showing a modification of the control board arranged in the board case of FIG.
For example, as shown in FIG. 7A, the depth of the central control board 102 among the control boards 101, 102, 103 may be shorter than the control boards 101, 103 on both sides. In this case, as described above, the heights of the control boards 101 and 103 may be increased in order from the left end, or the heights of the control boards 101 and 103 may be substantially the same. Similar effects can be obtained.

  Further, as shown in FIG. 7B, among the control boards 101, 102, 103, the length of the depth of the control board 101 at the left end may be made the shortest and may be increased stepwise as going to the right side. . Also in this case, the heights of the control boards 101 and 103 may be increased in order from the left end, or the heights of the control boards 101 and 103 may be substantially the same, and the same effects as in the present embodiment. Is obtained.

  1 cooker body, 1a back plate, 1b bottom plate, 2 left heating coil, 2a inner coil, 2b middle coil, 2c outer coil, 2d ferrite, 3 right heating coil, 3a inner coil, 3b outer coil, 3c ferrite, 4 center Heating coil, 4a ferrite, 5 horizontal partition plate, 6 grille, 7 exhaust port, 8 intake port, 9 fan unit, 91 lid case, 92 fan case, 92a upper case, 92b lower case, 92c upper discharge port, 92d lower discharge Outlet, 93 motor, 93a holding member, 93b screw, 93c rotating shaft, 94 sirocco fan, 94a shielding plate, 95 air passage, 96 fan storage, 96a partition plate, 96b upper suction port, 96c peripheral edge of fan storage 96 96d, lower suction port, 10 substrate case, 101, 102, 103 control substrate, 10a Opening, 11 the coil cooling duct, 12 left coil cooling duct, 12a ejection holes, 13 right coil cooling duct, 13a ejection holes, 14 top plate.

Claims (9)

The cooker body,
A top plate provided at the top of the cooker body;
An intake port and an exhaust port provided behind the top plate in the cooker body;
A heating coil installed below the top plate;
A board case having a plurality of control boards installed in an upright state inside the cooker body on the inlet side; and
A coil cooling duct installed below the heating coil and connected to the substrate case;
The outside air is taken as the cooling air from the intake port and sucked, and the sucked cooling air is discharged into the substrate case to cool the control board, and sent to the coil cooling duct through the substrate case, A heating coil and a fan unit that cools surrounding components,
The fan unit is
The upper and lower suction ports connected to the side surface of the substrate case on the opposite side of the back plate of the cooker body, and a fan storage portion provided with an upper suction port and a lower suction port above and below in the vertical direction A fan case having a discharge port and forming an air passage connected to the intake port with a back plate and a bottom plate of the cooker body;
A motor provided with a gap in the upper suction port of the fan housing portion, and a rotating shaft directed toward the bottom plate;
Provided in the fan housing part, outside air is taken into the air passage as cooling air by driving the motor, and sucks a larger amount of cooling air from the lower suction port than the upper suction port of the fan housing unit. And a fan for discharging each cooling air from the upper discharge port and the lower discharge port into the substrate case,
Of the control boards in the board case, the height of the control board on the side of the heating coil is the lowest, and is increased stepwise as the distance from the heating coil increases.   The induction heating cooker according to claim 1, wherein, among the control boards in the board case, a central control board is formed so that the depth of the central control board is shorter than the control boards on both sides.   The length of the depth of the control board by the side of the said heating coil among each control board in the said board | substrate case is the shortest, and becomes long in steps as it distances from the said heating coil. Induction heating cooker.   The induction heating cooker according to claim 2 or 3, wherein the height of each control board in the board case is substantially the same.   5. The induction heating according to claim 1, wherein the fan includes one sirocco fan provided in the fan housing portion between the upper suction port and the lower suction port. Cooking device. The fan unit is
A lid case provided above the fan case with the motor and a gap;
A partition plate provided between the fan housing and the sirocco fan;
Cooling that is provided inside the sirocco fan at the same height as the partition plate, rotates the sirocco fan when the rotation shaft of the motor rotates, and is sucked from the upper suction port and the lower suction port, respectively 6. The induction heating cooker according to claim 5, further comprising a circular shielding plate that guides air to the upper discharge port and the lower discharge port with the partition plate.   The induction heating cooker according to claim 6, wherein the upper discharge port and the lower discharge port of the fan case are separated by the partition plate.   The induction heating cooker according to any one of claims 1 to 7, wherein the lower discharge port is formed smaller than the opening of the upper discharge port.   The induction heating cooking according to any one of claims 5 to 8, wherein a height of the sirocco fan in an axial direction is equal to or less than a height of both the upper discharge port and the lower discharge port. vessel.

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