JP2010003638A - Electromagnetic cooker - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electromagnetic cooker having a center grill structure which is superior in usability without being affected by a user's dominant hand, and adapted to a kitchen having an arbitrary layout. <P>SOLUTION: The electromagnetic cooker includes a housing having air intake windows and an exhaust window, a grill unit arranged nearly in the center between a pair of side faces of the housing, a coil unit arranged above the grill unit, a pair of circuit chambers arranged and installed between respective pair of side faces of the grill unit and the housing, and the pair of blower fans each of which is arranged and installed between the air intake windows of the housing and the chamber air intake windows of the circuit chamber. By sending air taken in from the air intake windows into respective circuit chambers, respective blower fans raise static pressure in the respective circuit chambers to cool power supply circuits and then cool the coil unit. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an electromagnetic cooker provided with a grill.

  According to the conventional electromagnetic cooker, the grill for cooking fish etc. is arranged on either the left or right side of the main body of the electromagnetic cooker, and the other is provided with a controller for controlling a plurality of induction heating coils and grills. ing.

JP 2004-213913 A JP 2006-202624 A

  However, such an electromagnetic cooker is difficult to use depending on the handedness of the user and is inconvenient, and also restricts the floor plan of the kitchen equipped with the electromagnetic cooker. Therefore, the present invention provides an electromagnetic cooker having a center grille structure in which a grill is arranged at substantially the center of an electromagnetic cooker body, being easy to use without being influenced by the user's dominant hand, and adaptable to a kitchen having an arbitrary floor plan. The purpose is to provide.

  Further, the present invention provides an electromagnetic cooker having a center grill structure, which is disposed on both sides of the grill and efficiently cools a pair of power supply circuits (power semiconductor devices, etc.) for supplying power to the induction heating coil. It aims at providing the electromagnetic cooker which implement | achieves size reduction and noise reduction.

  An electromagnetic cooker according to the present invention includes a front surface, a rear surface, and a pair of side surfaces, a housing having an intake window and an exhaust window arranged adjacent to the rear surface on the top plate, and the pair of side surfaces of the housing. Between the grill unit and the pair of side surfaces of the housing. The grill unit disposed at substantially the center of the grill unit, the coil unit disposed above the grill unit and having a pair of induction heating units, and the pair of side surfaces of the housing. A pair of circuit chambers having a chamber intake hole and a chamber exhaust hole, each having a built-in power supply circuit for supplying high-frequency power to the induction heating unit, the intake window of the housing, and the chamber intake hole of each circuit chamber A pair of blower fans disposed between each of the blower fans, and each of the blower fans receives air sucked from the intake window of the housing. By blowing air into each circuit chamber, the static pressure in each circuit chamber is raised to cool the power supply circuit, and the induction in the coil unit is performed by the air exhausted from each chamber exhaust hole. The heating unit is cooled.

  According to the present invention, by providing an electromagnetic cooker having a center grill structure in which the grill unit is disposed in the center of the housing, it can be adapted to a kitchen having an arbitrary floor plan that is convenient for the user, The power supply circuit for supplying power to the induction heating coil can be efficiently cooled, and the size and noise reduction of the blower fan can be realized.

  Embodiments of an electromagnetic cooker according to the present invention will be described below with reference to the accompanying drawings. In the description of each embodiment, terms representing directions (for example, “up”, “down”, “right”, “left”, “X direction”, “Y direction”, and “ Z direction "and the like are used as appropriate, but this is for explanation, and these terms do not limit the present invention.

Embodiment 1 FIG.
The first embodiment of the electromagnetic cooking device according to the present invention will be described in detail below with reference to FIGS. FIG. 1 is a perspective view schematically illustrating the whole of an electromagnetic cooker according to the present invention. In FIG. 1, an electromagnetic cooker 1 generally includes a housing (housing) 10, a top plate 12 formed of glass or the like covering substantially the entire upper surface of the housing 10, and a pair of induction heating units disposed on the left and right A coil unit (not shown in FIG. 1) 30 having 32a and 32b is provided. The coil unit 30 may include a radiant heating unit 33 using a radiant heater that is optional but not based on the induction heating method.

  As shown in FIG. 1, the housing 10 has a front surface 13 and a rear surface 14 parallel to the XZ plane, and a pair of side surfaces 15 and 16 parallel to the YZ plane (arranged on the left and right). 12 has an exhaust window 17 and a pair of intake windows 18a, 18b provided adjacent to the rear surface 14 on the upper side.

  The induction heating parts 32a and 32b have induction heating coils (not shown) for generating heat in the pan itself by forming an eddy current at the bottom of the pan that is to be heated. Further, the electromagnetic cooker 1 includes an operation panel 40 used for a user to operate the induction heating unit 32 in the vicinity of the front surface 13 on the top plate 12, a liquid crystal display for displaying a control state of the induction heating unit 32, and the like. The display device 45 is provided. The electromagnetic cooker 1 according to the present invention includes a coil unit 30 (not shown in FIG. 1) incorporating the induction heating units 32a and 32b described above, and a pair of side surfaces 15 and 16 of the housing 10 below the coil unit 30. It has a grill unit 60 (indicated by a broken line in FIG. 1) arranged in the center. Although not shown in detail, the grill unit 60 has a built-in grill (radiant heater) for cooking fish and the like.

  FIG. 2 is a plan view showing the whole of the electromagnetic cooking device 1 when the top plate 12 and the operation panel 40 are omitted, and the display device 45, the induction heating unit 32, and the radiant heating unit 33 are indicated by broken lines. FIG. 3 shows an XZ sectional view taken along the line III-III in FIGS. 1 and 2. In addition to the grill unit 60, the electromagnetic cooker 1 has a coil unit 30 configured as a casing. As described above, a pair of induction heating units 32a and 32b and a radiant heating unit 33 are provided in the coil unit 30. It is arranged.

  4 is a plan view showing the whole of the electromagnetic cooker 1 when the bottom plate 34 (FIG. 3) constituting the coil unit 30 is further omitted, and FIG. 5 is taken along the line V-V in FIGS. 1 and 4. It is YZ sectional drawing when cut | disconnecting. As shown in FIG. 4, the electromagnetic cooker 1 includes circuit chambers 50 a and 50 b arranged one on each side between the grill unit 60 and the side surfaces 15 and 16 of the housing 10. In the circuit chambers 50a and 50b, power supply circuits 52a and 52b for supplying a high-frequency current to the induction heating units 32a and 32b and blower fans 54a and 54b for cooling the power supply circuits 52a and 52b are incorporated. Yes. Each of the power supply circuits 52a and 52b includes substrates 55a and 55b and at least one power semiconductor device 53. Here, the substrates 55a and 55b are arranged in parallel with the side surfaces 15 and 16, and the power semiconductor device 53 is opposed to the side surfaces 15 and 16 of the housing so that the substrates 55a and 55b block heat transfer from the grill unit 60. Is arranged. Each circuit chamber 50a, 50b has chamber intake holes 56a, 56b and chamber exhaust holes 57a, 57b as shown in FIG. And each circuit chamber 50a, 50b of this invention has the ventilation fans 54a, 54b arrange | positioned between the intake windows 18a, 18b of the housing and the chamber intake holes 56a, 56b. As described above, the electromagnetic cooking device 1 according to the present invention has a center grill structure and is configured to be substantially symmetrical with respect to the center plane between the pair of side surfaces 15 and 16 of the housing 10. ing.

In the electromagnetic cooker 1 configured as described above, when the user operates at least one of the induction heating units 32a and 32b using the operation panel 40, the power supply circuits 52a and 52b cause the high-frequency current corresponding to the user's operation. Is supplied to the induction heating sections 32a and 32b to heat the pan, and both the blower fans 54a and 54b are operated to blow air from the intake windows 18a and 18b of the housing 10 into the circuit chambers 50a and 50b. (Arrow W ₁ ). As shown in FIG. 5, the air (arrow W ₂ ) blown into the circuit chambers 50a and 50b efficiently cools the power supply circuits 52a and 52b and is exhausted from the chamber exhaust holes 57a and 57b ( An arrow W ₃ ) in FIG. 2 is exhausted from the exhaust window 17 of the housing 10 after cooling the induction heating units 32 a and 32 b built in the coil unit 30.

  Generally, the permissible temperature at which the power supply circuits 52a and 52b can operate is lower than the permissible temperature of the induction heating units (induction heating coils) 32a and 32b, so the power supply circuits 52a and 52b are arranged upstream of the induction heating units 32a and 32b. By doing so, both can be efficiently cooled by a single airflow. Therefore, the number of rotations of the blower fans 54a and 54b for cooling the power supply circuits 52a and 52b and the induction heating units 32a and 32b can be suppressed to reduce noise, or the blower fans 54a and 54b can be downsized. Can do. Further, the blower fans 54a and 54b are disposed adjacent to the rear surface 14 of the housing, that is, the blower fans 54a and 54b are disposed with a distance as large as possible from the user operating in front of the front surface 13. Therefore, noise transmitted to the user can be suppressed.

  As shown in FIG. 2, the static pressure in the circuit chambers 50a and 50b is reduced by making the opening areas of the chamber exhaust holes 57a and 57b of the circuit chambers 50a and 50b smaller than the intake windows 18a and 18b of the housing 10. It is preferable to make it sufficiently higher than atmospheric pressure. More preferably, when the opening area of the intake windows 18a and 18b with respect to the chamber exhaust holes 57a and 57b is 1.5 times or more, the static pressure in the circuit chambers 50a and 50b can be increased by about 300 Pa from the atmospheric pressure. .

  The circuit chambers 50a and 50b are usually configured as a single casing by bending a sheet metal or the like, but are not necessarily completely hermetically sealed and connected to other members constituting the housing 10 or the like. Therefore, when the static pressure in the circuit chambers 50a and 50b is lower than the atmospheric pressure (a negative pressure), air may flow into the circuit chambers 50a and 50b from outside the intake windows 18a and 18b. There is. At this time, in the electromagnetic cooker 1 having the center grill structure, since the circuit chambers 50a and 50b are close to the grill unit 60, they are heated on the surface of the grill unit 60 (internal temperature is about 270 ° C.). There is a possibility that hot air may enter the circuit chambers 50a and 50b. However, according to the electromagnetic cooker 1 according to the present invention, since the blower fans 54a and 54b are arranged on the most upstream side of the circuit chambers 50a and 50b, the static pressure of the circuit chambers 50a and 50b is made sufficiently larger than the atmospheric pressure. be able to. Further, since the opening areas of the intake windows 18a and 18b with respect to the chamber exhaust holes 57a and 57b are increased (preferably 1.5 times or more than the chamber exhaust holes 57a and 57b), high-temperature air from the grill unit 60 is connected to the circuit. Intrusion into the chambers 50a and 50b can be reliably prevented, and cooler air can be taken in from the intake windows 18a and 18b of the housing 10 to maximize the cooling effect.

  As described above, according to the present invention, there is provided an electromagnetic cooker having a center grill structure that has a high cooling effect and low noise, is easy to use regardless of the user's dominant hand, and can accommodate a kitchen having an arbitrary floor plan. Can be provided.

Embodiment 2. FIG.
Next, Embodiment 2 of the electromagnetic cooking device according to the present invention will be described in detail below with reference to FIGS. The electromagnetic cooker 2 according to the second embodiment has the same configuration as that of the electromagnetic cooker 1 of the first embodiment, except that it has an inverted U-shaped heat shield plate 62 that substantially surrounds the grill unit 60. Therefore, the description of overlapping contents is omitted.

  6 is a cross-sectional view of the electromagnetic cooker 2 similar to FIG. 3, and FIG. 7 is a plan view of the electromagnetic cooker 2 similar to FIG. As described above, the electromagnetic cooker 2 of the second embodiment has the inverted U-shaped heat shield plate 62 that substantially surrounds the grill unit 60. That is, the heat shield plate 62 is disposed between the grill unit 60 and the coil unit 30 and between the grill unit 60 and the circuit chambers 50a and 50b so as to block radiant heat from the grill unit 60. is there. The heat shield plate 62 can be made of any material having heat resistance, but it is inexpensive and preferable to use a steel plate (so-called sheet metal). It is further preferable to suppress the emissivity of the heat shield plate 62 by subjecting the heat shield plate 62 to a surface treatment such as polishing or plating. The surface treatment is preferably performed on at least the surface opposite to the surface facing the grill unit 60 of the heat shield plate 62 (that is, the surface on the coil unit 30 side), and the emissivity is preferably suppressed. It is preferable to apply the heat plate 62 on both sides.

  Normally, the internal temperature of the grill unit 60 rises to about 270 ° C., while the allowable temperature of the induction heating units (induction heating coils) 32a and 32b is about 160 ° C. However, since the electromagnetic cooker of the present invention has a center grille structure, substantially the entire bottom plate 34 of the coil unit 30 faces the grill unit 60 and receives radiant heat directly from the grill unit 60, resulting in excessive temperature rise. Cheap. Similarly, due to the center grill structure of the present invention, the circuit chambers 50a and 50b disposed on both sides of the grill unit 60 also have a lower allowable temperature than the induction heating units 32a and 32b. There is a risk of heating by radiant heat from 60.

  However, according to the electromagnetic cooker 2 of the second embodiment, the inverted U-shaped heat shield plate 62 is separated between the grill unit 60 and the coil unit 30 and between the grill unit 60 and each circuit chamber 50a, 50b. In this way, the radiant heat from the grill unit 60 can be blocked or suppressed by the air layer from being transmitted to the coil unit 30 and the circuit chambers 50a and 50b.

  In general, heat from the grill unit 60 is transferred to the heat shield plate 62 through an air layer interposed therebetween, but the thicker the air layer as a medium, the less likely it is to conduct heat. However, when convection occurs in the air, the thermal resistance of the air layer is dramatically reduced, and the heat shielding effect is significantly reduced. Further, it is known that convection does not occur in the air when the thickness of the air layer as a medium (that is, the heat insulation interval) is smaller than a predetermined value. According to the present inventors, the heat insulation interval is less than about 6 mm. It was recognized that the surface temperature of the heat shield plate 62 and the temperature rise in the coil unit 30 and each of the circuit chambers 50a and 50b were most suppressed. That is, according to the present invention, the heat insulation intervals between the heat shield plate 62 and the grill unit 60, between the heat shield plate 62 and the coil unit 30, and between the heat shield plate 62 and each of the circuit chambers 50a and 50b can be reduced. By making it smaller than the distance at which convection occurs, preferably by making it smaller than about 6 mm, the temperature rise due to air convection can be suppressed, and the radiant heat from the grill unit 60 can be blocked more efficiently.

  The heat shield plate 62 according to the second embodiment employs an inverted U-shaped one, that is, one opened near the rear surface 14 of the housing, but may be substantially closed, You may comprise so that the radiant heat from the grill unit 60 which opposes the rear surface 14 may be interrupted | blocked similarly.

Embodiment 3 FIG.
The third embodiment of the electromagnetic cooking device according to the present invention will be described in detail below with reference to FIGS. The electromagnetic cooker 3 according to the third embodiment has the same configuration as the electromagnetic cooker 1 of the first embodiment, except that the coil unit 30 has a T-shaped duct 80 that communicates with the circuit chambers 50a and 50b. Therefore, the description of the overlapping contents is omitted.

  8 and 9 are plan views of the same electromagnetic cooker 3 as in FIGS. 2 and 4, respectively. FIG. 10 is a cross-sectional view of the electromagnetic cooker 3 as in FIG. FIG. 11 is a plan view showing a T-shaped duct 80. 12 is a cross-sectional view of the T-shaped duct 80 as viewed from the line XII-XII in FIG. 11, and FIG. 13 is a front view of the T-shaped duct 80 shown in FIG. As described above, the coil unit 30 of the third embodiment incorporates the T-shaped duct 80. As shown in FIGS. 11 and 12, the duct 80 includes a duct long side portion 82 extending in the X direction between the pair of side surfaces 15 and 16 of the housing 10, and a Y between the front surface 13 and the rear surface 14 of the housing 10. It has a duct short side portion 84 extending in the direction, and the duct long side portion 82 is connected to the duct short side portion 84 at substantially the center thereof. The duct 80 has a pair of duct suction holes 86a and 86b and a single duct discharge hole 88 on both the left and right sides. The duct suction holes 86a and 86b are chamber exhaust holes 58a and 58b (see FIG. 8, the duct discharge hole 88 communicates with the exhaust window 17 of the housing 10. Further, the T-shaped duct 80 is provided with a display device 45 such as a liquid crystal display on the upper surface so that the user can visually recognize the duct from the upper side through the top plate 12 at the center of the long side portion 82 of the duct. Similarly, a drive circuit 90 for driving the display device 45 is provided in the approximate center of the duct long side portion 82.

In the electromagnetic cooking device 3 configured as described above, when the user operates any one of the induction heating units 32 using the operation panel 40, both the blower fans 54a, As shown in FIG. 10, air is blown into each circuit chamber 50a, 50b (arrow W ₁ ), and the air blown into each circuit chamber 50a, 50b (arrow W ₂ ) is As shown in FIG. 8, the display device 45 and the drive circuit 90 which are guided into the duct 80 through the chamber exhaust holes 58a and 58b (arrow W _{4 in} FIG. 8) and disposed in the duct 80 are preferentially cooled. To do. The air exhausted from the duct exhaust hole 88 is exhausted from the exhaust window 17 of the housing 10 after cooling the induction heating portions 32 a and 32 b in the coil unit 30. As described above, since the display device 45 and the drive circuit 90 having an allowable temperature lower than those of the induction heating units 32a and 32b can be preferentially cooled, the highly reliable electromagnetic cooker 3 can be realized.

  Further, the duct 80 is replaced with a plurality of coil cooling holes 92 opposed to the induction heating portions 32a and 32b and the rear surface 14 of the housing 10 as shown in FIG. 13 instead of or in addition to the single duct discharge hole 88. May be provided in the duct long side portion 82. According to the coil cooling hole 92, the air flow (air flow) can be rectified in a certain direction (Y direction), and an increase in pressure loss due to non-uniform air flow velocity can be prevented, so that the cooling effect can be improved. it can. Further, in FIG. 13, the opening area of each coil cooling hole 92 is illustrated as being uniform, but may be increased toward the center. That is, the duct 80 may have both a single duct discharge hole 88 and a plurality of coil cooling holes 92, or may have one of them.

  Each circuit chamber 50a, 50b may have a plurality of chamber exhaust holes as shown in FIG. 8, that is, the first chamber exhaust holes 57a, (shown by the one-dot chain line in FIGS. 8 and 9). 57b communicates directly with the coil unit 30 as in the first embodiment, and the second chamber exhaust holes 58a and 58b (shown by broken lines in FIGS. 8 and 9) are duct suction holes of the T-shaped duct 80. You may comprise so that it may be connected with 86a, 86b. By adjusting the opening areas of the first and second chamber exhaust holes 57 and 58, desired air to the induction heating units 32 a and 32 b and the display device 45 (and the drive circuit 90) by the air from the respective chamber exhaust holes can be obtained. A cooling effect can be realized. As shown in FIG. 10, the circuit chambers 50 a and 50 b according to the third embodiment do not have the first chamber exhaust holes 57 a and 57 b that communicate directly with the coil unit 30, and the T-shaped duct 80. Only the second chamber exhaust holes 58a and 58b communicating with each other may be provided.

Embodiment 4 FIG.
A fourth embodiment of the electromagnetic cooking device according to the present invention will be described in detail below with reference to FIGS. 14 to 17. The electromagnetic cooker 4 according to the fourth embodiment is different from the fourth embodiment except that the circuit chambers 50a and 50b have panel cooling holes 59a and 59b that form an air flow that cools the grill unit 60 and the operation panel 40. Since it has the same structure as the 1 electromagnetic cooker 1, description is abbreviate | omitted about the overlapping content.

  FIG. 14 is a cross-sectional view of the electromagnetic cooker 4 when the operation panel 40 of FIG. 1 is cut along the XVI-XVI line that runs vertically, and FIG. 15 is a plan view of the electromagnetic cooker 4 similar to FIG. 16 is a cross-sectional view of the electromagnetic cooker 4 similar to FIG. As described above, each of the circuit chambers 50a and 50b according to the fourth embodiment includes the grill unit 60 and the operation panel on the side walls 51a and 51b parallel to the YZ plane constituting the circuit chambers 50a and 50b, as shown in FIGS. Panel cooling holes 59a and 59b that form an air flow that cools 40 are provided.

According to the electromagnetic cooker according to the present invention, as shown in FIG. 2, the grill unit 60 is below the coil unit 30 and protrudes toward the front surface 13 from the coil unit 30. That is, the operation panel 40 does not have the coil unit 30 below and opposes the grill unit 60. The grill unit 60 is usually made of metal because heat resistance is normally required. However, when the grill unit 60 is in operation, the grill unit 60 becomes hot and directly radiates heat to the operation panel 40, thereby May overheat. Therefore electromagnetic cooker 4 according to the fourth embodiment, the panel cooling holes 59a (arrow W ₅ in FIG. 14 and FIG. ₁₅₎ for the operation panel 40 and which guides the air flow to the top plate of the grill unit 60 to be opposed, 59b Is provided in each circuit chamber 50a, 50b, and the grill unit 60 (and thus the operation panel 40) is sufficiently cooled to prevent malfunctions such as malfunctions. The air that has cooled the operation panel 40 and the like is exhausted from the exhaust window 17 of the housing 10 through the gap between the grill unit 60 and the bottom plate 34 of the coil unit 30.

  In the fourth embodiment, the panel cooling holes 59a and 59b are described as being provided in the side walls 51a and 51b of the circuit chambers 50a and 50b. However, the present invention is not limited to this, and alternatively, FIG. As shown, a plurality of panel cooling holes 38 may be provided in the end wall 36 parallel to the XZ plane adjacent to the front surface 13 of the coil unit 30. Further alternatively, an end wall parallel to the XZ plane adjacent to the front face 13 of the duct long side portion 82 of the T-shaped duct 80 according to the third embodiment shown in FIG. A plurality of panel cooling holes 38 may be provided in the end wall 36 integrally with the end wall 36 of the unit 30 (not shown in detail). In this case, since the duct 80 has a higher static pressure than the coil unit 30, the speed of the air (airflow) blown out from the panel cooling hole 38 can be increased to cool the grill unit 60 and the operation panel 40 more efficiently. it can.

  In order to optimize the cooling efficiency of the panel cooling holes 59a and 59b, the height (H) of the panel cooling holes 59a and 59b provided in the side walls of the circuit chambers 50a and 50b is set to the height of the top plate of the grill unit 60. It is preferable that the height be higher than the height (h) (H> h).

  The embodiments described above can be implemented in any combination. For example, each circuit chamber 50a, 50b may have two chamber exhaust holes 57a, 57b (Embodiment 3), panel cooling holes 59a, 59b (Embodiment 4), and each circuit. The chambers 50a and 50b have a single chamber exhaust hole 57a and 57b communicating with the duct 80 (no chamber exhaust hole directly connected to the coil unit 30), and panel cooling holes 59a and 59b ( You may have Embodiment 4). Alternatively, an inverted U-shaped heat shield plate 62 that substantially surrounds the grill unit 60 is provided (Embodiment 2), and panel cooling holes 59a and 59b (Embodiment 4) are provided in the circuit chambers 50a and 50b. It may be provided.

It is a perspective view which shows roughly the electromagnetic cooker which concerns on Embodiment 1 of this invention. It is a top view which shows an electromagnetic cooker when the top plate and operation panel of FIG. 1 are abbreviate | omitted. It is XZ sectional drawing of an electromagnetic cooker when cut | disconnected by the III-III line | wire of FIG. It is a top view which shows an electromagnetic cooker when the baseplate of a coil unit is further abbreviate | omitted. It is YZ sectional drawing of an electromagnetic cooker when cut | disconnected by the VV line | wire of FIG. It is sectional drawing similar to FIG. 3 of the electromagnetic cooker which concerns on Embodiment 2. FIG. It is a top view similar to FIG. 4 of the electromagnetic cooking device which concerns on Embodiment 2. FIG. It is a top view similar to FIG. 2 of the electromagnetic cooking device which concerns on Embodiment 3. FIG. It is a top view similar to FIG. 4 of the electromagnetic cooking device which concerns on Embodiment 3. FIG. It is sectional drawing similar to FIG. 5 of the electromagnetic cooker which concerns on Embodiment 3. FIG. It is a top view of the T-shaped duct of FIG. It is sectional drawing of a T-shaped duct when it sees from the XII-XII line | wire of FIG. It is a front view of the T-shaped duct of FIG. It is sectional drawing when the electromagnetic cooker which concerns on Embodiment 4 is cut | disconnected by the XVI-XVI line of FIG. It is a top view similar to FIG. 4 of the electromagnetic cooker which concerns on Embodiment 4. FIG. It is sectional drawing similar to FIG. 5 of the electromagnetic cooker which concerns on Embodiment 4. FIG. It is a top view similar to FIG. 2 of the electromagnetic cooker which concerns on the modification of Embodiment 4. FIG.

Explanation of symbols

1-4: Electromagnetic cooker,
10: housing, 12: top plate, 13: front surface of housing, 14: rear surface of housing, 15, 16: side surface of housing, 17: exhaust window, 18: intake window,
30: Coil unit, 32: Induction heating unit, 33: Radiant heating unit, 34: Bottom plate, 36: End wall, 38: Panel cooling hole, 40: Operation panel, 45: Display device
50: circuit chamber, 52: power supply circuit, 53: power semiconductor device, 54: blower fan, 55: substrate, 56: chamber intake hole, 57, 58: chamber exhaust hole, 59: panel cooling hole,
60: Grill unit, 62: Heat shield,
80: T-shaped duct, 82: Long side of duct, 84: Short side of duct, 86: Duct suction hole, 88: Duct discharge hole, 90: Drive circuit, 92: Coil cooling hole.

Claims (11)

A housing having a front face, a rear face and a pair of side faces and having an intake window and an exhaust window disposed adjacent to the rear face on the top plate;
A grill unit disposed approximately in the middle between the pair of side surfaces of the housing;
A coil unit disposed above the grill unit and having a pair of induction heating units;
A pair of circuit chambers having a chamber intake hole and a chamber exhaust hole, which are disposed between the grill unit and each of the pair of side surfaces of the housing and incorporate a power supply circuit for supplying high-frequency power to the induction heating unit. When,
A pair of blower fans disposed between the intake window of the housing and the chamber intake hole of each circuit chamber;
Each blower fan cools the power supply circuit by raising the static pressure in each circuit chamber by blowing air sucked from the intake window of the housing into each circuit chamber, and An electromagnetic cooker, wherein the induction heating unit in the coil unit is cooled by air exhausted from a chamber exhaust hole.   The electromagnetic cooker according to claim 1, wherein the coil unit communicates with each chamber exhaust hole and an exhaust window of the housing.   The induction cooker according to claim 1 or 2, wherein each intake window of the housing has an opening area larger than that of each chamber exhaust hole, and makes the static pressure in the circuit chamber larger than atmospheric pressure.   4. The heat insulating plate having an inverted U-shape disposed between the grill unit and the coil unit and between the grill unit and each circuit chamber. The electromagnetic cooker described.   The heat insulation intervals between the heat shield plate and the grill unit, between the heat shield plate and the coil unit, and between the heat shield plate and each circuit chamber are made smaller than the distance at which air convection occurs within the heat insulation interval. The electromagnetic cooker according to claim 4, wherein the electromagnetic cooker is configured as follows.   The electromagnetic cooker according to claim 5, wherein the heat insulation interval is smaller than 6 mm. The coil unit has a T-shaped duct,
The electromagnetic cooking according to claim 1, wherein the duct has a display device that displays a control state of the induction heating unit, and communicates with each chamber exhaust hole and an exhaust window of the housing. vessel.   8. The electromagnetic cooker according to claim 7, wherein each circuit chamber has a first chamber exhaust hole communicating directly with the coil unit and a second chamber exhaust hole communicating with the duct. 9. The duct has a long duct portion extending between a pair of side surfaces of the housing, and a short duct portion extending between the front surface and the rear surface of the housing, which is connected substantially at the center of the long duct portion.
The electromagnetic cooker according to claim 7, wherein the display device is disposed at a substantially center of the long side portion of the duct. The duct has a plurality of duct cooling holes in the long side of the duct,
The induction cooker in any one of Claims 7-9 which cools the induction heating part in a coil unit with the air from the said duct cooling hole.   The electromagnetic cooker according to any one of claims 1 to 10, wherein both of the blower fans are activated when either one of the induction heating units is driven.

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