JP6879887B2 - Cooker - Google Patents

Description

The present invention relates to a heating cooker in which an object to be heated is placed on a top plate and heated.

Conventionally, there is a heating cooker in which a top plate is arranged above the main body and a plurality of mounting portions on which the object to be heated is placed are formed on the top plate. In this type of cooking cooker, heating means are arranged below each of the plurality of mounting portions in the main body. By driving each heating means, the object to be heated placed on the mounting portion is heated. Patent Document 1 describes a heating cooker including two heating means. In the heating cooker of Patent Document 1, each of the two heating means is a heating coil, and an inverter for driving the heating coil is provided in the main body. A main fan for cooling the inverter and the heat radiation fins of the inverter and two sub fans for cooling the two heating coils are provided in the main body.

Japanese Unexamined Patent Publication No. 2012-243544

By the way, in a heating cooker in which a plurality of mounting portions are formed on a top plate, a part of the heating means may be composed of a heating coil and a part of the heating means may be composed of an electric heater. The electric heater is driven by a triac that generates less heat than an inverter. Therefore, in the case where the plurality of heating means are all composed of heating coils and the case where a part of the plurality of heating means is composed of heating coils and a part of them is composed of an electric heater, the inside of the main body is cooled. It will be different. That is, conventionally, there has been a problem that the configuration for cooling the inside of the main body must be changed according to the type configuration of the plurality of heating means.

The present invention has been made against the background of the above-mentioned problems, and it is necessary to change the basic configuration for cooling the inside of the main body regardless of the type of a part of the plurality of heating means. It is intended to provide a non-cooking cooker.

The heating cooker according to the present invention is a heating cooker having a rectangular main body and a top plate arranged above the main body, and an object to be heated is placed on the top plate. The first mounting portion and the second mounting portion on which the object to be heated are placed are formed, and the first mounting portion is an induction heating coil provided below the first mounting portion in the main body. A heating means, a second heating means provided below the second mounting portion, a fan, and a drive circuit board on which the drive circuits of the first heating means and the second heating means are mounted. The duct includes a duct that guides the wind sent from the fan to the drive circuit board, and the duct has a substrate mounting plate on which the drive circuit board is placed and a substrate cover that covers the drive circuit board. The drive circuit board includes a first electronic component group including a first drive means for driving the first heating means, a first heat dissipation member for radiating heat generated by the first drive means, and a partition plate. The first electronic component group is mounted and arranged closer to the inlet of the duct into which the wind sent from the fan flows than the partition plate, and the first electronic component is mounted on the back surface of the substrate cover. A first partition wall is erected on the side closer to the inlet of the duct than the group, and a part of the wind flowing into the duct by the first partition wall and the partition plate is the first electronic component. It is configured to be guided by a group, and in the direction in which the wind flowing into the duct hits, the end portion of the first partition wall on the partition plate side and the end portion of the partition plate on the first partition wall side are They overlap and are in contact with each other .
Further, another heating cooker according to the present invention is a heating cooker having a rectangular main body and a top plate arranged above the main body, and the top plate has an object to be heated. An induction heating coil is formed in which a first mounting portion to be mounted and a second mounting portion on which a object to be heated are mounted are formed, and are provided below the first mounting portion in the main body. A drive in which a first heating means, a second heating means provided below the second mounting portion, a fan, and a drive circuit of the first heating means and the second heating means are mounted. The circuit board includes a circuit board and a duct that guides the wind sent from the fan to the drive circuit board. The duct includes a board mounting plate on which the drive circuit board is placed and a board cover that covers the drive circuit board. The drive circuit board includes a first electronic component group including a first driving means for driving the first heating means and a first heat radiating member for radiating heat generated by the first driving means. A partition plate is mounted, and the first electronic component group is arranged closer to the inlet of the duct into which the wind sent from the fan flows in than the partition plate, and on the back surface of the substrate cover, the said A first partition wall is erected on the side closer to the inlet of the duct than the first electronic component group, and a part of the wind flowing into the duct is described by the first partition wall and the partition plate. A second partition wall extending in parallel with the partition plate is erected on the back surface of the substrate cover so as to be guided by the first electronic component group, and the second partition wall is the first electron. It is arranged at a position farther from the inlet of the duct than the parts group, and a part of the wind flowing into the duct by the first partition wall and the second partition wall sandwiches the partition plate. It is configured to be guided to the side opposite to the side on which the first electronic component group is arranged, the second heating means is an electric heating means, and the second driving means for driving the second heating means and the said The second heat radiating member that dissipates the heat generated by the second driving means is arranged at a position farther from the partition plate than the second partition wall in the drive circuit board, and is a part of the wind that has flowed into the duct. However, the drive circuit board is provided with a shielding plate that prevents the partition plate from being guided to the opposite side of the side on which the first electronic component group is arranged.

According to the present invention, the cooling air can be guided to the first electronic component group regardless of whether or not the electronic component is mounted on the opposite side of the partition plate, and the cooling efficiency of the first electronic component group can be maintained. .. Therefore, no matter what type of the second heating means, which is one of the plurality of heating means, it is not necessary to change the configuration for cooling the first heating means.

It is a perspective view of the cooking apparatus which concerns on Embodiment 1 of this invention. It is an exploded perspective view of the cooking apparatus which concerns on Embodiment 1 of this invention. It is a perspective view of the outer case of the main body of the heating cooker which concerns on Embodiment 1 of this invention. It is an exploded perspective view of the outer case of the main body of the heating cooker which concerns on Embodiment 1 of this invention. It is a top view which shows the internal structure of the cooking apparatus which concerns on Embodiment 1 of this invention. It is a top view which shows the internal structure of the cooking apparatus which concerns on Embodiment 1 of this invention. It is a perspective view which shows the internal structure of the cooking apparatus which concerns on Embodiment 1 of this invention. It is a figure which shows the back surface of the drive circuit board cover. It is a perspective view which shows the drive circuit board cover from the back side. It is a figure which shows by cutting out a part of the drive circuit board cover. It is a figure which shows the inside of the thick line frame X of FIG. 10 enlarged. It is a top view which shows the internal structure of the cooking apparatus which concerns on Embodiment 1 of this invention. It is a perspective view which shows the internal structure of the cooking apparatus which concerns on Embodiment 1 of this invention. It is a top view which shows the internal structure of the cooking apparatus which concerns on Embodiment 2 of this invention. It is a perspective view which shows the internal structure of the cooking apparatus which concerns on Embodiment 2 of this invention. It is a figure which shows by cutting out a part of the drive circuit board cover.

Hereinafter, preferred embodiments of the cooker of the present invention will be described with reference to the drawings. The present invention is not limited to the embodiments described below. In addition, the size and shape of each component in the drawings are shown in an easy-to-understand manner for the sake of explanation, and may differ from the actual size and shape.

Embodiment 1.
FIG. 1 is a perspective view of a cooking device according to a first embodiment of the present invention. FIG. 2 is an exploded perspective view of the cooking device according to the first embodiment of the present invention. The cooking cooker 1 has a main body 10, a top plate 20, and a frame 30. The main body 10 has a rectangular shape. The top plate 20 is arranged above the main body 10 and is held by the frame 30. The top plate 20 has a rectangular shape. The top plate 20 is formed with a front mounting portion 21 which is a first mounting portion and a rear mounting portion 22 which is a second mounting portion. The front side mounting portion 21 and the rear side mounting portion 22 are mounting portions on which the object to be heated is placed, respectively. The front mounting portion 21 is formed on the front side and the left side of the top plate 20, and the rear mounting portion 22 is formed on the rear side and the right side of the top plate 20. That is, the front mounting portion 21 and the rear mounting portion 22 are formed on the diagonal line of the top plate 20.

An operation unit 31 is arranged on the front edge of the frame 30. The operation unit 31 is provided with a front operation button group 32, a rear operation button group 33, a power button 34, a timer button group 37, and the like. The front operation button group 32 includes a plurality of operation buttons for operating the heating conditions and the like in the front mounting unit 21, and the rear operation button group 33 is for operating the heating conditions and the like in the rear mounting unit 22. It consists of multiple operation buttons. The power button 34 is an operation button for turning on and off the power of the cooking cooker 1. The heating time of each mounting portion can be set by the timer button group 37. An exhaust port 35 is formed in a region on the right side of the rear edge of the frame 30. An exhaust cover 36 is attached to the rear edge of the frame 30 so as to cover the exhaust port 35.

In the top plate 20, a display portion 40 is provided at a corner portion where the front side edge portion and the right side edge portion intersect. That is, the display unit 40 is provided in a region where the front mounting portion 21 and the rear mounting portion 22 are not formed. The remaining heating time of each mounting unit displayed in response to the operation of the timer button group 37 is visually recognized via the display unit 40.

FIG. 3 is a perspective view of an outer case of the main body of the cooking cooker according to the first embodiment of the present invention. The outer case 300 has a box shape with an open upper surface. The outer case 300 has a rectangular bottom surface 301, a front side surface 302, a rear side surface 303, a right side surface 304, and a left side surface 305. The front side surface 302 is erected upward along the front edge of the bottom surface 301. The rear side surface 303 is erected upward along the rear edge of the bottom surface 301. The right side surface 304 is erected upward along the right edge of the bottom surface 301. The left side surface 305 is erected upward along the left edge of the bottom surface 301. A flange 306 extending rearward is formed on the rear side surface 303.

The exhaust port 35 is formed in the right half region of the flange 306. An intake port 307 is formed in the rear region on the right side of the bottom surface 301. On the rear side surface 303, a slit 308 is formed in the right half region. The slit 308 is composed of a plurality of elongated holes. The plurality of elongated holes of the slit 308 are formed so that the longitudinal direction is along the vertical direction, and are arranged in two rows vertically along the horizontal direction. In the present embodiment, the intake port 307, the slit 308, and the exhaust port 35 are gathered and positioned in the rear region on the right side of the outer case 300.

FIG. 4 is an exploded perspective view of an outer case of the main body of the cooking cooker according to the first embodiment of the present invention. An L-shaped reinforcing metal fitting 309 is attached to a corner where the rear side surface 303 and the right side surface 304 intersect. An L-shaped reinforcing metal fitting 310 is attached to a corner where the rear side surface 303 and the left side surface 305 intersect. A rear case 311 is attached to the rear of the rear side surface 303. The rear case 311 overlaps the slit 308.

FIG. 5 is a plan view showing the internal structure of the cooking cooker according to the first embodiment of the present invention. FIG. 5 shows a state in which the top plate 20 and the operation unit 31 are removed. Inside the outer case 300 of the main body 10, the first heating coil 51, the second heating coil 52, the display unit 41, the operation board 42, the operation button group 43, the drive circuit board cover 67, and the power supply circuit A board cover 73 is provided. The first heating coil 51 is a first heating means and is an induction heating coil. The second heating coil 52 is a second heating means and is an induction heating coil. The drive circuit board cover 67 is a first board cover, and the power supply circuit board cover 73 is a second board cover. The maximum thermal power of the first heating coil 51 is larger than the maximum thermal power of the second heating coil 52. The first heating coil 51 is arranged on the back surface side of the top plate 20 below the above-mentioned front mounting portion 21. The second heating coil 52 is arranged on the back surface side of the top plate 20 below the rear side mounting portion 22 described above. The first heating coil 51 is formed on the front side inside the outer case 300 and is arranged on the left side, and the second heating coil 52 is formed on the rear side inside the outer case 300 and on the right side. The 51 and the second heating coil 52 are arranged diagonally of the outer case 300. Further, the power supply circuit board cover 73 is arranged on the rear side in the outer case 300 and on the left side, and is arranged in a region where the first heating coil 51 and the second heating coil are not arranged.

The first heating coil 51 and the operation board 42 are attached to the upper surface of the drive circuit board cover 67. A heat shield wall 68 is provided on the upper surface of the drive circuit board cover 67. An air passage wall 74 is provided on the upper surface of the power supply circuit board cover 73. The thick arrow Y8 indicates the flow of wind in the main body 10. The flow of wind indicated by the drive circuit board cover 67, the heat shield wall 68, the power supply circuit board cover 73, the air passage wall 74, and the thick arrow Y8 will be described later.

FIG. 6 is a plan view showing the internal structure of the cooking cooker according to the first embodiment of the present invention. On the surface of the bottom surface 301 of the outer case 300, a drive circuit board mounting plate 60 is provided on the front side. On the surface of the bottom surface 301, a power supply circuit board mounting plate 70 and a fan mounting plate 80 are provided on the rear side. The power circuit board mounting plate 70 is located on the left side, and the fan mounting plate 80 is located on the right side. The power supply circuit board mounting plate 70 and the fan mounting plate 80 are integrated. In the vertical direction of the outer case 300, the fan mounting plate 80 is located above the power supply circuit board mounting plate 70. Between the power supply circuit board mounting plate 70 and the fan mounting plate 80, a slope portion 90 inclined upward from the power supply circuit board mounting plate 70 toward the fan mounting plate 80 is formed. The drive circuit board mounting plate 60 is a first board mounting plate, and the power supply circuit board mounting plate 70 is a second board mounting plate.

The power supply circuit board 71 is mounted on the upper surface of the power supply circuit board mounting plate 70. The power supply circuit board 71 supplies power to the cooking cooker 1. A noise filter 72 is mounted on the power supply circuit board 71. As described above with reference to FIG. 5, the first heating coil 51 is located on the front side in the outer case 300 and is arranged on the left side, and the second heating coil 52 is on the rear side in the outer case 300. It is formed on the right side. The power supply circuit board mounting plate 70 is located on the left side of the rear side of the bottom surface 301 of the outer case 300. Therefore, the power supply circuit board 71 on which the noise filter 72 is mounted is arranged in the main body 10 in a region where the first heating coil 51 and the second heating coil 52 are not arranged. A fan mounting portion 81 is mounted on the upper surface of the fan mounting plate 80. A circular opening 82 is formed in the fan mounting portion 81. The fan mounting portion 81 is arranged so that the opening 82 is located above the intake port 307 formed on the bottom surface 301 of the outer case 300 described above. A sirocco fan, which will be described later, is mounted on the fan mounting unit 81.

The drive circuit board 61 is mounted on the upper surface of the drive circuit board mounting plate 60. The drive circuit board 61 is a drive circuit board on which the drive circuits of the first heating coil 51 and the second heating coil 52 are mounted. A first electronic component group 91, a second electronic component group 92, and a partition plate 66 are mounted on the upper surface of the drive circuit board 61. The first electronic component group 91 has an inverter element 62 for frequency-driving the first heating coil 51 described above, and a first heat radiating fin group 63 for radiating heat generated by the inverter element 62. The inverter element 62 is the first driving means, and the first heat radiating fin group 63 is the first heat radiating member. The second electronic component group 92 has an inverter element 64 that frequency-drives the above-mentioned second heating coil 52, and a second heat radiating fin group 65 for radiating heat generated by the inverter element 64. The inverter element 64 is a second driving means, and the second heat radiating fin group 65 is a second heat radiating member.

The first electronic component group 91 and the second electronic component group 92 are positioned substantially in the center of the drive circuit board 61 in the front-rear direction and closer to the fan mounting portion 81 in the left-right direction. The first electronic component group 91 is located closer to the fan mounting portion 81 than the second electronic component group 92. In other words, the second electronic component group 92 is located on the side farther from the fan mounting portion 81 than the first electronic component group 91. The partition plate 66 is arranged between the first electronic component group 91 and the second electronic component group 92. The partition plate 66 is made of an insulating member.

FIG. 7 is a perspective view showing the internal structure of the cooking cooker according to the first embodiment of the present invention. FIG. 7 shows a state in which the first heating coil 51, the second heating coil 52, the display unit 41, the operation board 42, and the operation button group 43 shown in FIG. 5 are removed. The power supply circuit board cover 73 is arranged on the power supply circuit board mounting plate 70 shown in FIG. 6 and covers the power supply circuit board 71 shown in FIG. The power supply circuit board cover 73 and the power supply circuit board mounting plate 70 form a second duct 170. An inlet 731 through which wind flows is formed on the front side of the power supply circuit board cover 73, and an outlet 732 on which wind is sent out is formed on the right side. That is, in the second duct 170, the power supply circuit board 71 is located on the air passage of the wind that is sent from the inlet 731 and sent out from the outlet 732.

The air passage wall 74 erected on the upper surface of the power supply circuit board cover 73 has an arcuate shape. One end of the air passage wall 74 is located substantially in the center of the left side of the power supply circuit board cover 73, and the other end is at the corner where the rear side and the right side of the power supply circuit board cover 73 intersect. It is located and is curved so as to bulge toward the outside of the outer case 300.

A sirocco fan 83, which is a centrifugal fan, is mounted on the fan mounting portion 81. The sirocco fan 83 is arranged so that the wind is sent out in the horizontal direction. Further, the sirocco fan 83 is attached to the fan mounting portion 81 in a posture of being rotated in the direction opposite to the rotation direction R with respect to the outer case 300.

The drive circuit board cover 67 is arranged on the drive circuit board mounting plate 60 shown in FIG. 6 and covers the drive circuit board 61 shown in FIG. The drive circuit board cover 67 and the drive circuit board mounting plate 60 form a first duct 160.

FIG. 8 is a diagram showing the back surface of the drive circuit board cover. FIG. 9 is a perspective view showing the drive circuit board cover 67 from the back surface. The first duct 160 and the drive circuit board cover 67 will be described with reference to FIGS. 7, 8 and 9. The drive circuit board cover 67 has a main body convex portion 671 and a flange 672. The main body convex portion 671 has a rectangular parallelepiped shape with an open bottom as a whole, and has a pair of long side side surface portions 671A and long side side surface portions 671B, and a pair of short side side surface portions 671C and short side side surface portions 671D. And have. The long side side surface portion 671A and the long side side surface portion 671B extend substantially parallel to each other. The short side side surface portion 671C and the short side side surface portion 671D extend substantially parallel to each other and intersect the long side side surface portion 671A and the long side side surface portion 671B. The flange 672 is formed on the long side side surface portion 671B, the short side side surface portion 671C, and the short side side surface portion 671D of the main body convex portion 671. The drive circuit board cover 67 is attached to the drive circuit board mounting plate 60 so that the long side side surface portion 671A on which the flange 672 is not formed is located forward.

The convex portion 671 of the main body is provided with an inlet 673 into which the wind flows in and an outlet 674 in which the wind is sent out. The inlet 673 is formed on the long side side surface portion 671A at the corner portion where the long side side surface portion 671A intersects the short side side surface portion 671C. The outlet 674 is formed on the long side side surface portion 671A at the corner portion where the long side side surface portion 671A intersects the short side side surface portion 671D.

A plurality of cooling air holes 100, which are openings, are formed in the convex portion 671 of the main body. As shown in FIG. 7, the plurality of cooling air holes 100 are formed in a half region on the side where the second duct 170 is arranged in a state where the drive circuit board cover 67 is attached to the drive circuit board 61. ing. The size of the plurality of cooling air holes 100 is not constant, and the distance between them is not constant. That is, a plurality of cooling air holes 100 of various sizes are scattered on the convex portion 671 of the main body.

On the surface of the convex portion 671 of the main body, the above-mentioned arc-shaped heat shield wall 68 is erected, and a plurality of operation board receivers 69 are provided. As shown in FIG. 5, the heat shield wall 68 is curved along a part of the outer peripheral edge of the first heating coil 51. The operation board 42 shown in FIG. 5 is attached to the surface of the main body convex portion 671 via the operation board receiver 69.

Referring to FIGS. 8 and 9 again, the first partition wall 101, the second partition wall 102, the third partition wall 103, and the fourth partition wall 104 are erected on the back surface of the convex portion 671 of the main body. There is. The first partition wall 101 is arranged on the air passage of the wind flowing in from the inlet 673. The first partition wall 101 has a straight portion 101A and an arc portion 101B. The straight portion 101A extends parallel to the short side side surface portion 671C. The arc portion 101B is continuous with the straight portion 101A and is curved so as to bulge toward the corner where the long side side surface portion 671B and the short side side surface portion 671C intersect.

The second partition wall 102 extends from the short side side surface portion 671C in the inward direction of the main body convex portion 671 substantially parallel to the long side side surface portion 671A and the long side side surface portion 671B. The second partition wall 102 is arranged between the long side side surface portion 671A and the long side side surface portion 671B at a position close to the long side side surface portion 671B.

The third partition wall 103 projects from the short side side surface portion 671C toward the inward side of the main body convex portion 671. The third partition wall 103 is formed so that the angle of the short side side surface portion 671C with the inlet 673 side portion is an obtuse angle and the angle of the short side side surface portion 671C with the long side side surface portion 671B side portion is an acute angle. Has been done.

The fourth partition wall 104 has an L-shape and has a first straight line portion 104A and a second straight line portion 104B. The first straight line portion 104A is located slightly inward of the main body convex portion 671 with respect to the inlet 673, and extends substantially parallel to the short side side surface portion 671C. The second straight line portion 104B extends substantially parallel to the long side side surface portion 671A and the long side side surface portion 671B. That is, the second straight line portion 104B extends substantially parallel to the second partition wall 102.

The straight portion 101A of the first partition wall 101 flows in from the inlet 673, and the wind is divided into two so as to divide the flow of the wind guided by the first straight portion 104A of the fourth partition wall 104 and the short side side surface portion 671C. It is located on the wind path of. Further, the arc portion 101B of the first partition wall 101 is located between the second straight line portion 104B of the fourth partition wall 104 and the second partition wall 102.

The flow of wind flowing in from the inlet 673 of the first duct 160 is divided in two directions by the first partition wall 101. One of the wind flows divided in two directions is guided by the first straight line portion 104A and the first partition wall 101 of the fourth partition wall 104, and has a short side along the second straight line portion 104B of the fourth partition wall 104. It is a flow toward the side surface portion 671D. The other side of the wind flow divided in two directions is a flow guided by the first partition wall 101 and the third partition wall 103 toward the short side side surface portion 671D along the second partition wall 102. When the wind flowing along the second straight line portion 104B of the fourth partition wall 104 hits the short side side surface portion 671D, it is guided in the direction of the delivery port 674. Similarly, when the wind flowing along the second partition wall 102 hits the short side side surface portion 671D, it is guided in the direction of the delivery port 674. In the above aspect, in the first duct 160, the wind flowing in from the inlet 673 is sent out from the outlet 674.

As shown in FIG. 7, the first duct 160 is arranged in the outer case 300 so that the inlet 673 is located on the side of the sirocco fan 83 and the outlet 674 is located on the side of the second duct 170. .. That is, the first duct 160 is a duct that guides the wind sent from the sirocco fan 83 to the drive circuit board 61. The second duct 170 is arranged in the outer case 300 so that the inlet 731 faces the outlet 674 of the first duct 160. Therefore, the wind sent out from the outlet 674 of the first duct 160 in the above-described embodiment is sent to the inlet 731 of the second duct 170.

FIG. 10 is a diagram showing a part of the drive circuit board cover cut out. In FIG. 10, a part of the drive circuit board cover 67 is cut out at the portion indicated by the thick wire frame X. 10 is provided on the back surface of the main body convex portion 671 of the drive circuit board cover 67 and the components mounted on the drive circuit board 61 in a state where the drive circuit board cover 67 is attached to the drive circuit board 61. It shows the relative positional relationship with the existing members. FIG. 11 is an enlarged view of the inside of the thick line frame X of FIG.

The first partition wall 101 is positioned on the back surface of the main body convex portion 671 so as to be located closer to the inlet 673 of the first duct 160 than the partition plate 66 and the first electronic component group 91. In the direction in which the wind flowing into the first duct 160 hits, the end of the arc portion 101B of the first partition wall 101 on the partition plate 66 side and the end of the partition plate 66 of the first partition wall 101 on the arc portion 101B side. Are overlapping and are in contact with each other. The end of the arc portion 101B on the partition plate 66 side is located closer to the inlet 673 of the first duct 160 than the end of the partition plate 66 on the arc portion 101B side.

The second partition wall 102 is provided on the back surface of the main body convex portion 671 so as to extend in parallel with the partition plate 66. Further, the second partition wall 102 is positioned on the back surface of the main body convex portion 671 so as to be located at a position farther from the inlet 673 of the first duct 160 than the partition plate 66 and the first electronic component group 91.

With the above configuration, in the first duct 160, a part of the wind flowing in from the inlet 673 is guided to the first partition wall 101, then to the partition plate 66, and to the first electronic component group 91. .. Further, a part of the wind flowing in from the inlet 673 is guided to the second electronic component group 92 by the first partition wall 101, the second partition wall 102, and the third partition wall 103.

FIG. 12 is a plan view showing the internal structure of the cooking cooker according to the first embodiment of the present invention. FIG. 12 shows a state in which the top plate 20, the frame 30, the drive circuit board cover 67, and the power supply circuit board cover 73 are removed. FIG. 13 is a perspective view showing the internal structure of the cooking cooker according to the first embodiment of the present invention. FIG. 13 is a perspective view similar to that of FIG. 7, and shows the flow of cooling air in the main body 10 of the cooking cooker 1. Here, the flow of the cooling air in the main body 10 of the cooking cooker 1 will be described with reference to FIGS. 5, 12, and 13. In FIG. 13, the thick dotted arrows Y1, Y2, and Y3 indicate the flow of the cooling air in the first duct 160. In FIG. 13, the thick dotted arrow Y4 indicates the flow of the cooling air in the second duct 170.

As shown in FIGS. 12 and 13, when the sirocco fan 83 is rotated in the rotation direction R indicated by the thin arrow, the sirocco fan 83 takes in outside air from the intake port 307 shown in FIG. 6 and sends out cooling air. .. As described above, the sirocco fan 83 is attached to the fan mounting portion 81 in a posture of being rotated in the direction opposite to the rotation direction R with respect to the outer case 300. With this configuration, the cooling air generated by the rotation of the sirocco fan 83 in the rotation direction R is sent out toward the inlet 673 of the first duct 160 as shown by the thick arrow Y1.

As described with reference to FIGS. 8 and 9, the cooling air flowing into the first duct and the inlet 673 of 160 is the short side side surface portion 671D of the drive circuit board cover 67 as indicated by the thick arrow Y2. Guided in the direction of. That is, the cooling air flowing into the inlet 673 is guided in the direction intersecting the sending direction of the cooling air of the sirocco fan 83 and toward the inside of the main body 10. The rotation direction R of the sirocco fan 83 is a direction in which the cooling air flowing into the inlet 673 intersects the sending direction of the cooling air in the sirocco fan 83, and is the same as the inward bending direction of the main body 10. It has become.

Next, a part of the cooling air guided in the direction toward the short side side surface portion 671D hits the short side side surface portion 671D as described with reference to FIGS. 8 and 9, and is sent as shown by the thick arrow Y3. Guided in the direction of exit 674. That is, the cooling air is guided in the direction opposite to the sending direction of the cooling air of the sirocco fan 83.

Next, the cooling air sent out from the inlet 674 of the first duct 160 flows into the inlet 731 of the second duct 170. The cooling air flowing into the inlet 731 hits the rear side surface of the power supply circuit board cover 73, and is sent out from the outlet 732 in the direction in which the sirocco fan 83 is located, as indicated by the thick arrow Y4.

Next, the cooling air sent out from the outlet 732 is guided to the sirocco fan 83 by the slope portion 90 as indicated by the thick arrow Y5. The cooling air guided to the sirocco fan 83 passes through the slit 308 as indicated by the thick arrow Y6, and is discharged outward from the exhaust port 35 as indicated by the thick arrow Y7.

As described above, in the present embodiment, the cooling air sent from the sirocco fan 83 is sent to the drive circuit board cover 67 by the first duct 160 formed by the drive circuit board cover 67 and the drive circuit board 61. You will be led to exit 674. Then, the cooling air sent out from the outlet 674 of the drive circuit board cover 67 is sent to the sirocco fan 83 by the second duct 170 formed by the power supply circuit board cover 73 and the power supply circuit board 71. That is, the first duct 160 guides the cooling air sent from the sirocco fan 83 in the direction intersecting the sending direction of the sirocco fan 83 and toward the inside of the main body 10, and sends the cooling air to the sirocco fan 83. An air passage leading in the opposite direction is formed. A second duct 170 forms an air passage that sends out the cooling air guided in the direction opposite to the sending direction of the sirocco fan 83 in the direction in which the sirocco fan 83 is provided. In the air passage formed by the first duct 160 and the second duct 170, the drive circuit board 61 is located in the first duct 160, and the power supply circuit board 71 is located in the second duct 170. As a result, the first electronic component group 91 and the second electronic component group 92 mounted on the drive circuit board 61, and the mounted components of the power supply circuit board 71 are cooled.

On the other hand, a part of the cooling air guided in the direction toward the short side side surface portion 671D is above the drive circuit board cover 67 through a plurality of cooling air holes 100 provided in the main body convex portion 671 of the drive circuit board cover 67. Flow out to. As described above, the first heating coil 51 is attached to the surface of the drive circuit board cover 67. As a result, the bottom surface of the first heating coil 51 is cooled. The cooling air flowing upward of the drive circuit board cover 67 is guided to the air passage wall 74 and to the second heating coil 52 as shown by the thick arrow Y8 in FIG. As a result, the bottom surface of the second heating coil 52 is cooled. A first heating coil 51 and a second heating coil 52 are located in this air passage. Then, the cooling air that has cooled the bottom surface of the second heating coil 52 passes through the slit 308 as indicated by the thick arrow Y6, and is discharged outward from the exhaust port 35 as indicated by the thick arrow Y7. ..

As described above, according to the first embodiment, the first electronic component group 91 is closer to the inlet 673 of the first duct 160 into which the wind sent from the sirocco fan 83 flows than the partition plate 66. Have been placed. Then, a part of the wind flowing into the first duct 160 is transferred to the first electronic component group 91 by the first partition wall 101 and the partition plate 66 erected on the back surface of the main body convex portion 671 of the drive circuit board cover 67. It is configured to be guided. Therefore, the cooling air can be guided to the first electronic component group 91 regardless of whether or not the electronic component is mounted on the opposite side of the partition plate 66, and the cooling efficiency of the first electronic component group 91 can be maintained. As a result, even if the second heating coil 52, which is one of the plurality of heating means, is another type of heating means, it is not necessary to change the configuration for cooling the first heating coil 51.

According to the first embodiment, the second partition wall 102 is erected on the back surface of the main body convex portion 671 of the drive circuit board cover 67. Then, a part of the cooling air flowing into the first duct 160 by the first partition wall 101 and the second partition wall 102 is on the side where the first electronic component group 91 is arranged with the partition plate 66 interposed therebetween. Guided to the other side. Therefore, cooling air can be guided to both sides of the partition plate 66. As a result, the cooling air can be guided to the first electronic component group 91 regardless of whether or not the electronic component is mounted on the opposite side of the partition plate 66, and the cooling efficiency of the first electronic component group 91 can be maintained. ..

In the direction in which the wind flowing into the first duct 160 hits, the end of the arc portion 101B of the first partition wall 101 on the partition plate 66 side and the end of the partition plate 66 of the first partition wall 101 on the arc portion 101B side. Are overlapping and are in contact with each other. Therefore, a part of the cooling air that flows into the first duct 160 and is guided to the first electronic component group 91 is prevented from leaking to the opposite side of the partition plate 66. As a result, the cooling efficiency of the first electronic component group 91 can be maintained.

Further, the end of the arc portion 101B of the first partition wall 101 on the partition plate 66 side is located closer to the inlet 673 of the first duct 160 than the end of the partition plate 66 on the arc portion 101B side. There is. Therefore, even if the wind pressure of the cooling air flowing into the first duct 160 and being guided to the first electronic component group 91 becomes large, the end portion of the arc portion 101B on the partition plate 66 side is displaced in the direction away from the inlet 673. This is prevented by the partition plate 66. As a result, the cooling efficiency of the first electronic component group 91 can be maintained.

The maximum thermal power of the first heating coil 51 is larger than the maximum thermal power of the second heating coil 52. Therefore, by maintaining the cooling efficiency of the first electronic component group 91, the life of the inverter element 62 of the first electronic component group 91 can be extended.

Embodiment 2.
FIG. 14 is a plan view showing the internal structure of the cooking cooker according to the second embodiment of the present invention. In FIG. 14, the same members as those in the first embodiment are designated by the same reference numerals. In the second embodiment, the electric heater 53 is provided as the second heating means. Since other configurations are the same as those in the first embodiment, the description thereof will be omitted.

FIG. 15 is a perspective view showing the internal structure of the cooking cooker according to the second embodiment of the present invention. FIG. 15 shows a state in which the first heating coil 51, the electric heater 53, the operation board 42, the operation button group 43, the drive circuit board cover 67, and the power supply circuit board cover 73 are removed. FIG. 16 is a diagram showing a part of the drive circuit board cover 67 cut out. In FIG. 16, a part of the drive circuit board cover 67 is cut out at a portion indicated by a thick wire frame Y. FIG. 16 is provided on the back surface of the main body convex portion 671 of the drive circuit board cover 67 and the components mounted on the drive circuit board 61 in a state where the drive circuit board cover 67 is attached to the drive circuit board 61. It shows the relative positional relationship with the existing members.

In FIGS. 15 and 16, the same members as those in the first embodiment are designated by the same reference numerals. In the second embodiment, since the second heating means is an electric heater, the drive circuit board 61 does not have a member corresponding to the second electronic component group 92 of the first embodiment. That is, in the partition plate 66, the electronic component is not mounted on the side opposite to the side where the first electronic component group 91 is arranged. 15 and 16 show a state in which the receiving portion 57 for attaching the electronic component group is exposed.

As shown in FIG. 16, in the second embodiment, the drive circuit board 61 is provided with a triac 54 for driving the electric heater 53 and a heat radiating member 55 for dissipating heat generated by the triac 54. .. The triac 54 is a second driving means, and the heat radiating member 55 is a second heat radiating member. The triac 54 and the heat radiating member 55 are arranged on the drive circuit board 61 at a position farther from the partition plate 66 than the second partition wall 102.

Further, the drive circuit board 61 is provided with a shielding plate 56. The shielding plate 56 is for preventing the cooling air flowing into the first duct 160 from being guided to the opposite side of the partition plate 66 on which the first electronic component group 91 is arranged. .. The shielding plate 56 is arranged on the side of the end portion of the partition plate 66 on the first partition wall 101 side on the air passage formed by the partition plate 66 and the second partition wall 102. Since other configurations are the same as those in the first embodiment, the description thereof will be omitted.

According to the second embodiment, as in the first embodiment, the inlet of the first duct 160 to which the wind sent from the sirocco fan 83 flows in from the partition plate 66 is guided to the first electronic component group 91 as in the first embodiment. It is located on the side closer to 673. Then, a part of the wind flowing into the first duct 160 is transferred to the first electronic component group 91 by the first partition wall 101 and the partition plate 66 erected on the back surface of the main body convex portion 671 of the drive circuit board cover 67. It is configured to be guided. Therefore, the cooling air can be guided to the first electronic component group 91 regardless of whether or not the electronic component is mounted on the opposite side of the partition plate 66, and the cooling efficiency of the first electronic component group 91 can be maintained. As a result, even if the electric heater 53, which is one of the plurality of heating means, is another type of heating means, it is not necessary to change the configuration for cooling the first heating coil 51.

In the second embodiment, the electronic components are not mounted on the side opposite to the side where the first electronic component group 91 is arranged with the partition plate 66 interposed therebetween, so that the wind easily flows. However, in the second embodiment, the shielding plate 56 is provided. Therefore, it is prevented that the cooling air flows to the side where the first electronic component group 91 is arranged with the partition plate 66 interposed therebetween. As a result, the cooling efficiency of the first electronic component group 91 can be maintained.

Further, the shielding plate 56 is arranged on the side of the end portion of the partition plate 66 on the first partition wall 101 side on the air passage formed by the partition plate 66 and the second partition wall 102. Therefore, the flow of the cooling air to the side where the first electronic component group 91 is arranged across the partition plate 66 can be prevented more efficiently. As a result, the cooling efficiency of the first electronic component group 91 can be more reliably maintained.

The maximum thermal power of the first heating coil 51 is larger than the maximum thermal power of the electric heater 53. Therefore, by maintaining the cooling efficiency of the first electronic component group 91, the life of the inverter element 62 of the first electronic component group 91 can be extended.

1 heat cooker, 10 main body, 20 top plate, 21 front mounting part, 22 rear mounting part, 30 frame, 31 operation part, 32 front operation button group, 33 rear operation button group, 34 power button, 35 Exhaust port, 36 Exhaust cover, 37 Timer button group, 40 Display unit, 41 Display unit, 42 Operation board, 43 Operation button group, 51 1st heating coil, 52 2nd heating coil, 53 Electric heater, 54 Triac, 55 Heat dissipation Members, 56 Shielding Plate, 57 Receiver, 60 Drive Circuit Board Mounting Board, 61 Drive Circuit Board, 62 Inverter Element, 63 First Radiation Fin Group, 64 Inverter Element, 65 Second Radiation Fin Group, 66 Partition Plate, 67 Drive Circuit board cover, 68 heat shield wall, 69 operation board receiver, 70 power supply circuit board mounting plate, 71 power supply circuit board, 72 noise filter, 73 power supply circuit board cover, 74 air passage wall, 80 fan mounting plate, 81 fan mounting part , 82 Opening, 83 Sirocco fan, 90 Slope, 91 1st electronic component group, 92 2nd electronic component group, 100 Cooling air hole, 101 1st partition wall, 101A straight part, 101B arc part, 102 2nd partition wall , 103 3rd partition wall, 104 4th partition wall, 104A 1st straight part, 104B 2nd straight part, 160 1st duct, 170 2nd duct, 300 outer case, 301 bottom surface, 302 front side surface, 303 rear side surface, 304 Right side, 305 Left side, 306 Flange, 307 Intake port, 308 Slit, 309 Reinforcing metal fittings, 310 Reinforcing metal fittings, 311 Rear case, 671 Main body convex part, 671A Long side side surface, 671B Long side side surface, 671C Short side Side surface, 671D short side side surface, 672 flange, 673 inlet, 674 outlet, 731 inlet, 732 outlet.

Claims (8)

A cooker having a rectangular body and a top plate disposed above the body.
The top plate is formed with a first mounting portion on which the object to be heated is placed and a second mounting portion on which the object to be heated is placed.
In the main body
The first heating means, which is an induction heating coil, provided below the first mounting portion,
A second heating means provided below the second mounting portion, and
With fans
A drive circuit board on which the drive circuits of the first heating means and the second heating means are mounted, and
A duct for guiding the wind sent from the fan to the drive circuit board is provided.
The duct has a substrate mounting plate on which the drive circuit board is placed and a substrate cover that covers the drive circuit board.
The drive circuit board includes a first electronic component group including a first drive means for driving the first heating means, a first heat dissipation member for radiating heat generated by the first drive means, and a partition plate. Installed,
The first electronic component group is arranged closer to the inlet of the duct into which the wind sent from the fan flows in than the partition plate.
On the back surface of the substrate cover, a first partition wall is erected on the side closer to the inlet of the duct than the first electronic component group.
The first partition wall and the partition plate are configured so that a part of the wind flowing into the duct is guided to the first electronic component group .
In the direction in which the wind flowing into the duct hits, the end portion of the first partition wall on the partition plate side and the end portion of the partition plate on the first partition wall side overlap and are in contact with each other for heating. Cooking device. On the back surface of the substrate cover, a second partition wall extending parallel to the partition plate is erected.
The second partition wall is arranged at a position farther from the inlet of the duct than the first electronic component group.
The first partition wall and the second partition wall guide a part of the wind flowing into the duct to the opposite side of the partition plate on which the first electronic component group is arranged. The heating cooker according to claim 1, which is configured as such. The second heating means is an induction heating coil.
The drive circuit board is equipped with a second electronic component group including a second drive means for driving the second heating means and a second heat dissipation member for dissipating heat generated by the second drive means.
The heating cooker according to claim 1 or 2, wherein the second electronic component group is arranged on the opposite side of the partition plate from the side on which the first electronic component group is arranged. The second heating means is an electric heater.
The second driving means for driving the second heating means and the second heat radiating member for radiating the heat generated by the second driving means are located at positions far from the partition plate in the drive circuit board with respect to the second partition wall. The heating cooker according to claim 2, which is arranged in. Claims 1 to 4, wherein the end portion of the first partition wall on the partition plate side is located closer to the inlet of the duct than the end portion of the partition plate on the first partition wall side . The heating cooker according to any one item. A cooker having a rectangular body and a top plate disposed above the body.
The top plate is formed with a first mounting portion on which the object to be heated is placed and a second mounting portion on which the object to be heated is placed.
In the main body
The first heating means, which is an induction heating coil, provided below the first mounting portion,
A second heating means provided below the second mounting portion, and
With fans
A drive circuit board on which the drive circuits of the first heating means and the second heating means are mounted, and
A duct for guiding the wind sent from the fan to the drive circuit board is provided.
The duct has a substrate mounting plate on which the drive circuit board is placed and a substrate cover that covers the drive circuit board.
The drive circuit board includes a first electronic component group including a first drive means for driving the first heating means, a first heat dissipation member for radiating heat generated by the first drive means, and a partition plate. Installed,
The first electronic component group is arranged closer to the inlet of the duct into which the wind sent from the fan flows in than the partition plate.
On the back surface of the substrate cover, a first partition wall is erected on the side closer to the inlet of the duct than the first electronic component group.
The first partition wall and the partition plate are configured so that a part of the wind flowing into the duct is guided to the first electronic component group.
On the back surface of the substrate cover, a second partition wall extending parallel to the partition plate is erected.
The second partition wall is arranged at a position farther from the inlet of the duct than the first electronic component group.
The first partition wall and the second partition wall guide a part of the wind flowing into the duct to the opposite side of the partition plate on which the first electronic component group is arranged. Is configured to
The second heating means is an electric heater.
The second driving means for driving the second heating means and the second heat radiating member for radiating the heat generated by the second driving means are located at positions far from the partition plate in the drive circuit board with respect to the second partition wall. Is located in
The drive circuit board is provided with a shielding plate that prevents a part of the wind that has flowed into the duct from being guided to the opposite side of the partition plate on which the first electronic component group is arranged. pressurized heat cooker that has been. The sixth aspect of claim 6 in which the shielding plate is arranged on the air passage formed by the partition plate and the second partition wall on the side of the end portion of the partition plate on the first partition wall side. Heating cooker. The heating cooker according to any one of claims 1 to 7 , wherein the maximum heating power of the first heating means is larger than the maximum heating power of the second heating means.

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