JP2012054254A - Heating cooker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heating cooker having a high heat shielding effect.SOLUTION: The heating cooker comprises: an upper body unit 1; and a lower body unit 2 formed separable in vertical direction. The upper body unit 1 includes a top plate 4, heating coils 7a and 7b inductively heating a heating target through the top plate 4, control boards 8a and 8b having control circuits driving the heating coils 7a and 7b, respectively, and cooling fans 9a and 9b cooling the control boards 8a and 8b and the heating coils 7a and 7b. The lower body unit 2 includes a cooking chamber 23 having a heat shielding structure provided with single-layer or multilayered heat shield walls 26 and 27 provided on top, bottom, left and right sides, a top cover plate 22 provided above the lower body unit 2 and included in the heat shielding structure of the cooking chamber 23, and side shielding plates provided on both sides of the cooking chamber 23. The lower body unit 2 includes substantially straight cooling ducts 31a and 31b each formed of side parts inside the lower body unit 2 partitioned by the side shielding plates of the cooking chamber 23. A second control board 33 is disposed in each of the cooling ducts 31a and 31b in a vertical direction.

Description

  The present invention relates to a cooking device having an induction heating unit.

  A cooking device with an induction heating unit has recently been attracting attention because of its high thermal efficiency and high safety. Among them, a multifunctional type with multiple types of heating, taking into account the convenience of cooking. There are more and more heating cookers. In such a cooking device, the main body is generally composed of an upper unit having an induction heating unit and the like, and a lower unit having a cooking chamber such as a grill (also called a roaster, oven, etc.). Yes (see, for example, Patent Document 1).

Japanese Patent Laying-Open No. 2005-327739 (page 4-5, FIGS. 2 and 3)

  The cooking device shown in Patent Document 1 provides a gap between the bottom plate of the upper unit and the heat shield cover of the roaster heating unit, and allows the cooling air to flow after cooling the heating coil and its control board in this gap. Thus, the heat of the roaster heating unit is prevented from being transmitted to the upper unit. Further, the cooling air is exhausted forward from a louver provided on the front surface of the cooking device. Therefore, in such a structure, it is assumed that the roaster heating unit is cooled, and the heat insulation of the roaster heating unit is not sufficient. Further, since the cooling air is taken from the rear of the main body and exhausted to the front of the main body, the user is uncomfortable.

An object of this invention is to provide the heating cooker with the favorable heat-shielding effect of a cooking chamber in view of the above subjects.
Another object of the present invention is to provide a heating cooker that allows efficient cooling without causing discomfort to the user by taking in cooling air from the front of the main body and exhausting it to the rear of the main body. .

  A heating cooker according to the present invention includes a main unit upper unit and a main unit lower unit configured to be separable in the vertical direction, and the main unit upper includes an induction heating of a top plate and an object to be heated via the top plate. And a control board having a control circuit for driving the heating coil, and a cooling fan for cooling the control board and the heating coil. A cooking cabinet having a thermal insulation structure configured by providing a thermal insulation wall; an upper lid plate provided at an upper part of the lower unit of the main body and serving as a part of the thermal insulation structure of the cooking cabinet; and both sides of the cooking cabinet A side heat shield plate provided on the side, and the lower unit of the main body has a substantially straight cooling air passage in which both sides of the main body are partitioned by the side heat shield plate of the cooking chamber. In the cooling air passage 2 of the control board is one that is installed in the vertical direction.

  The heating cooker of the present invention is configured so that the main unit upper unit and the main unit lower unit can be separated vertically, and the upper lid plate of the main unit lower unit is part of the heat shield structure of the cooking cabinet. It is possible to prevent heat from being transmitted from the cooking chamber to the unit on the main body, thereby suppressing an increase in temperature of the unit on the main body. Further, the lower unit of the main body has a substantially straight cooling air passage in which both sides of the inside are partitioned by the side heat shield plates of the cooking chamber, and the second control board is vertically arranged in the cooling air passage. Since it is installed, the insertability of the second control board is good, and component damage on the board can be alleviated. In addition, since the boards can be installed vertically, a board with a large area can be used, and costs can be reduced, such as a reduction in harnesses connecting a plurality of boards.

The disassembled perspective view of the heating cooker in embodiment of this invention. The disassembled perspective view of the exhaust part etc. of this heating cooker. The disassembled perspective view of the principal part of the main body lower unit of FIG. The cross-sectional front view of a main unit lower unit. The disassembled perspective view of the inlet part of cooling air. Explanatory drawing which shows the flow of cooling air. The partial cross section side view of an infrared rays light emission part. Explanatory drawing for demonstrating the wiring connection of the board | substrate of an operation / display part.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.
FIG. 1 is an exploded perspective view showing the cooking device in an exploded form according to the embodiment of the present invention, FIG. 2 is an exploded perspective view of an exhaust portion and the like of this cooking device, and FIG. 3 is a main part of the lower unit of FIG. 4 is an exploded perspective view of the lower unit of the main body, FIG. 5 is an exploded perspective view of the cooling air inlet portion, FIG. 6 is an explanatory view showing the flow of the cooling air, and FIG. FIG. 8 is a cross-sectional side view, and FIG.

  As shown in FIG. 1, the heating cooker 10 is configured such that the main body is separable into a main body upper unit 1 and a main body lower unit 2 in the vertical direction. The main unit upper unit 1 and the main unit lower unit 2 are coupled to each other by a pair of coupling members 60 (the left coupling member is not shown) on both side surfaces. That is, the coupling member 60 is provided with a plurality of projections 61, and the projections 61 are engaged with the elongated holes 62 provided on the side surface of the main body lower unit 2, and the coupling member 60 is connected to the main unit upper unit 1 with the screws 63. By fixing to the side surface, the main unit upper unit 1 and the main unit lower unit 2 are coupled.

  The main unit upper unit 1 includes a main unit upper case 3 and a top plate 4 mounted thereon. The top plate 4 is made of an inorganic material such as glass and is made larger than the upper case 3 of the main body. The top plate 4 has a plurality of heating portions 5a, 5b, and 5c on which an object to be heated (not shown) is placed, and heating means. And an operation / display unit 6 for turning on / off the output and adjusting the output. The operation / display unit 6 is arranged near the front part of the top plate 4 so as to be easy to use. Inside the main body upper case 3, heating coils 7a and 7b by induction heating and a heater-type radiant coil 7c are arranged as heating means. Further, an operation provided with cooling fans 9a and 9b for cooling the heating coils 7a and 7b and the control boards 8a and 8b having a control circuit for driving these heating coils, a plurality of switches 11a and a liquid crystal display unit 11b. A display board 11 and a control board 12 connected to the operation / display board 11 are disposed inside the upper case 3. Further, air inlets 13a and 13b are provided behind the control boards 8a and 8b for driving the coils, and a cooling cover 14a that covers each of the air inlets 13a and 13b, the control boards 8a and 8b, and the cooling fans 9a and 9b. , 14b are provided.

  For this reason, for example, air sucked from the intake port 13a by the cooling fan 9a on the left side of FIG. 1 cools the control board 8a, and then blows out from a number of air holes 7e provided in the support plate 7d of the heating coil 7a. The coil 7a is cooled. As will be described later, the exhaust is exhausted from a main body exhaust port 41 of a back frame 40 provided behind the top plate 4. This cooling action is the same as that on the left side for the right cooling fan 9b. Moreover, since each heating coil 7a, 7b and control board 8a, 8b are each covered with the cooling covers 14a, 14b and are shielded from others, cooling can be performed intensively and efficient cooling can be performed. It can be carried out.

Three adjustment knobs for adjusting the relative displacement between the main unit upper unit 1 and the main unit lower unit 2 are provided on the front surface of the main body upper case 3, and the adjustment knob 15 in the horizontal direction is arranged at the center. Both sides are front and rear adjustment knobs 16a and 16b. In FIG. 1, reference numeral 17 denotes a support block that supports the shaft of each adjustment knob. Although the adjustment mechanism of each adjustment knob is not shown, the left and right adjustment knob 15 is, for example, by a rack and pinion, and the front and rear adjustment knobs 16a and 16b are by screws within a few millimeters in each direction. Fine adjustment is possible. These adjustment knobs are effective, for example, when installing in a stepped mounting hole provided in a kitchen counter so that the top plate 4 and the surface of the kitchen counter are substantially flush with each other and with the center aligned. is there.
Moreover, infrared LED51 for interlocking | combining with a ventilation fan (not shown) so that it may mention later is installed in the rear part of the main body upper case 3.

  The main body lower unit 2 includes a main body lower case 21 and an upper cover plate 22 placed on the lower case 21. In addition, a cooking chamber 23, also called a grill, is provided in the lower body unit 2, and the cooking chamber 23 can be pulled forward by a door 24. On both sides of the front surface of the lower main unit 2, an operation unit 25 for adjusting the on / off of the heating coils 7 a and 7 b and the output is provided. The heating coils 7a and 7b can be turned on / off and the output can be adjusted by either the display / operation unit 6 or the operation unit 25 described above.

  As shown in FIG. 4, the cooking chamber 23 includes an upper grill heater 23a and a lower grill heater 23b. Further, one or more heat shield walls are provided on the top and bottom and the side of the cooking chamber 23. In the present embodiment, a heat shield structure having two (double) heat shield walls 26 and 27 is provided. The inner heat shield wall 26 is formed so as to surround the cooking chamber 23. The outer heat shield wall 27 is disposed on the side of the inner heat shield wall 26, and the side heat shield walls 27 a and 27 b that divide the inside of the main body lower case 21 into three regions, the center and the left and right sides, and the sides thereof. The upper cover plate 22 is fixed to the upper portions of the heat shield walls 27a and 27b. That is, a part of the upper lid plate 22 forms an upper shielding wall 27 c of the outer heat shielding wall 27. Thereby, the circumference | surroundings of the cooking chamber 23 comprise the heat insulation structure which has the two air layers 28a and 28b. Therefore, the heat of the cooking chamber 23 can be sufficiently prevented from being transmitted to the main unit 1 and the temperature increase of the main unit 1 can be suppressed. As shown in FIGS. 3 and 4, when a concave portion 29 is provided in the upper lid plate 22 corresponding to the upper surface portion of the cooking chamber 23, an air layer is formed between the concave portion 29 and the bottom plate of the main unit upper unit 1. Therefore, the above heat shielding effect can be further improved.

  On the back surface of the cooking chamber 23, an L-shaped smoke exhaust cylinder 30 is provided slidably with respect to the cooking chamber 23. As shown in FIGS. 1 and 2, the smoke exhaust cylinder 30 is connected to the grill exhaust port 42 of the rear frame 40 connected to the rear portion of the top plate 4, and the upper flange portion 30 a is connected to the rear frame 40 with screws 39. It is supposed to be fixed to.

  As shown in FIG. 3, substantially straight cooling air passages 31 a and 31 b are formed on both sides of the main body lower case 21. The cooling air passages 31a and 31b are partitioned by the side heat shield walls 27a and 27b, respectively, and the cooling fan 32 and the second control board 33 installed in the vertical direction include the cooling air passages 31a and 31b. Installed. Note that one of the second control boards 33 (for example, the right side) is a control board for the power supply system, and the other (left side) is a control board for driving the induction heating coils 5a and 5b. Further, in the present embodiment, as shown in FIGS. 3 and 4, the cooling fan 32 and the second control board 33 are configured as a board cooling duct box 34 installed therein, and this board cooling duct is formed. The box 34 is accommodated in each cooling air passage 31a, 31b. In addition, you may install the cooling fan 32 and the 2nd control board 33 in each cooling air path 31a, 31b directly, without using the board | substrate cooling duct box 34. FIG. Further, the cooling fan 32 may be installed downstream of the cooling air passage (rear part of the main body lower case 21).

Cooling air from the cooling fan 32 flows as shown by arrows in FIG. That is, as shown in FIGS. 3 to 5, the right cooling air passage will be described (the same applies to the left cooling air passage), and an intake port is formed below the operation plate 35 on both sides of the front panel of the lower body case 21. 36 is provided, and the air inlet 36 communicates with the opening 34a at the tip of the substrate cooling duct box 34 through a ventilation hole 37 formed of a plurality of elongated holes. Further, the opening 34b at the rear end of the substrate cooling duct box 34 communicates with a discharge port 38 formed by a notch in the rear portion of the upper cover plate 22, and the discharge port 38 is provided in the rear portion of the main body upper case 3 as described above. It leads to the right inlet 13b.
Further, as shown in FIG. 1, a main body exhaust port 41 and a grill exhaust port 42 are provided in the rear frame 40 at the rear portion of the top plate 4. Further, an exhaust port cover holder 44 having a main body exhaust port 43 is attached on the rear frame 40, and an exhaust port cover 45 having a large number of exhaust ports (not shown) formed of, for example, punching metal or the like is provided thereon. It is attached. Note that these exhaust ports are not shown in FIG.

  Therefore, the cooling air sucked from the air inlet 36 by the cooling fan 32 flows in the board cooling duct box 34 that forms the cooling air passage 31b, and cools the second control board 33 installed vertically. The cooling air that has passed through the substrate cooling duct box 34 enters the cooling cover 14b from the suction port 13b provided in the upper case 3 of the main body, and is further sucked by the cooling fan 9b to be controlled by the control board (first control board) 8b. Then, the cooling air blows out from the vent holes of the support plate and cools the heating coil 7b. Thereafter, the cooling air is discharged to the outside through the main body exhaust port 41 of the back frame 40, the main body exhaust port 43 of the exhaust port cover holder 44, and the exhaust port cover 45.

  Thus, since the cooling air passages 31a and 31b in the lower unit 2 are formed straight, the insertion property when the second control board 33 is installed in the vertical direction is good, and the parts on the board are damaged. Can be relaxed. Moreover, since a board | substrate can be installed vertically, a board | substrate with a large area can be used. As a result, the current multi-stage horizontally stacked substrates can be integrated into one sheet, and the cost can be reduced by reducing the number of harnesses that connect a plurality of substrates. Furthermore, efficient cooling with less pressure loss in the cooling air passage is possible by using a single substrate. Further, when the board cooling duct box 34 in which the cooling fan 32 and the vertical second control board 33 are installed is used as described above, handling and maintenance are improved. Further, the cooling air is taken in from the lower part of the front surface of the lower main unit 2 and exhausted from the rear part of the upper main unit 1, and the cooling air is not exhausted forward of the main body, so that the user feels uncomfortable. There is nothing.

  The odor, steam, etc. generated in the cooking chamber 23 are discharged through the smoke exhaust tube 30 through the grill exhaust port 42 of the rear frame 40, the main body exhaust port 43 of the exhaust port cover holder 44, and the exhaust port cover 45. Further, the heating operation by the cooking chamber 23, the heating coils 7a and 7b, and the radial coil 7c is the same as the conventional one, and the description thereof is omitted.

  The rear frame 40 at the rear of the top plate 4 is provided with an infrared light emitting unit 50 that is linked to a ventilation fan (not shown). The infrared light emitting unit 50 includes an infrared LED 51 attached to the main body upper case 3, an infrared LED protective cover 52 made of a transparent member attached to the back frame 40, and an infrared LED hole provided in the exhaust port cover holder 44. 53. The infrared LED 51 emits a pulse signal for controlling the on / off of the ventilation fan, the intensity of blowing, and the like. One infrared light emitting unit 50 may be provided, but two infrared light emitting units 50 are preferably provided to ensure the operation.

Since the infrared light emitting unit 50 is disposed behind the cooking unit such as the heating coils 7a and 7b, the object to be heated is not placed on the light emitting surface, thereby preventing light emission. Further, it is not necessary to take a measure such as providing a light emission window in a part of the top plate 4, and the cost can be reduced without using a dedicated design.
Further, as shown in FIG. 7, the distal end portion of the infrared LED protective cover 52 projects upward from the exhaust port cover holder 44. For this reason, the infrared LED 51 can be protected from oil smoke and spillage. In FIG. 7, reference numeral 71 denotes a front fixing bracket, and 72 denotes a rear fixing bracket. The front fixing bracket 71 and the rear fixing bracket 72 can be raised by screws, and each tip is attached to the rear surface of the kitchen counter 100. Comes into contact with and fixes the cooking device. Further, a hole 73 for operating the rear fixing bracket 72 is provided in the back frame 40 as shown in FIG.

  Next, in the operation / display unit 6 described above, the operation / display board 11 and the control board 12 are connected by a plurality of wires (harnesses) as shown in FIG. Among these, a part of wiring is twisted to make a stranded wire 81. As a result, it is possible to prevent noise from the power supply system wiring from entering the signal (audio or display, video, etc.) system wiring. It is possible to take measures against noise by a simple method which does not require such cost. It is effective in a cooking device that can be connected to the Internet.

  1 Main unit, 2 Main unit, 3 Main case, 4 Top plate, 5a, 5b, 5c Heating unit, 6 Operation / display unit, 7a, 7b Heating coil, 7c Radiant coil, 7d Support plate, 7e Vent , 8a, 8b Control board, 9a, 9b Cooling fan, 10 Heating cooker, 11 Operation / display board, 11a Switch, 11b Liquid crystal display, 12 Control board, 13a, 13b Air inlet, 14a, 14b Cooling cover, 21 Lower case of main body, 22 Upper cover plate, 23 Cooking chamber, 23a Upper grill heater, 23b Lower grill heater, 24 Door, 25 Operation part, 26 Inner heat shield wall, 27 Outer heat shield wall, 28a, 28b Air layer, 29 Recess , 30 Smoke stack, 31a, 31b Cooling air path, 32 Cooling fan, 33 Second control board, 34 Board cooling duct box 35, operation panel, 36 air inlet, 37 air vent, 38 exhaust port, 40 back frame, 41 main body exhaust port, 42 grill exhaust port, 43 main body exhaust port, 44 exhaust port cover holder, 45 exhaust port cover, 50 infrared Light emitting part, 51 infrared LED, 52 infrared LED protective cover, 53 infrared LED hole, 60 coupling member, 81 stranded wire.

Claims (7)

A main unit upper unit and a main unit lower unit configured to be separable up and down,
The upper unit includes a top plate, a heating coil for inductively heating an object to be heated via the top plate, a control board having a control circuit for driving the heating coil, and cooling the control board and the heating coil. And a cooling fan that
The main unit lower unit is provided with a cooking chamber having a heat shielding structure formed by providing one or more heat shielding walls on the upper and lower sides and the side, and a heat shielding structure of the cooking unit provided at an upper part of the lower unit of the main unit. An upper lid plate that is a part of the side cover, and side heat shield plates provided on both sides of the cooking chamber,
The main unit lower unit has a substantially straight cooling air passage in which both side portions of the main body are partitioned by the side heat shield plates of the cooking chamber, and a second control board is vertically installed in the cooling air passage. A cooking device characterized by being installed in a direction. A main unit upper unit and a main unit lower unit configured to be separable up and down,
The upper unit includes a top plate, a heating coil for inductively heating an object to be heated via the top plate, a control board having a control circuit for driving the heating coil, and cooling the control board and the heating coil. And a cooling fan that
The main unit lower unit is provided with a cooking chamber having a heat shielding structure formed by providing one or more heat shielding walls on the upper and lower sides and the side, and a heat shielding structure of the cooking unit provided at an upper part of the lower unit of the main unit. An upper lid plate that is a part of the side cover, and side heat shield plates provided on both sides of the cooking chamber,
The lower unit of the main body has a substantially straight cooling air passage in which both side portions inside are partitioned by the side heat shield plates of the cooking cabinet, and is installed in a vertical direction with the cooling fan. A heating cooker, wherein a substrate cooling duct box having a substrate is accommodated in the cooling air passage.   The cooking device according to claim 1 or 2, wherein the upper lid plate is placed on the side heat shield plate so as to have an air layer between the cooking chamber and the cooking chamber.   The concave part is provided in the part of the upper cover plate corresponding to the upper surface part of the cooking chamber, and an air layer is provided between the bottom plate of the main unit upper unit. The cooking device described.   The cooking device according to claim 1 or 2, wherein a rear frame is connected to the rear of the top plate of the upper unit of the main body, and an infrared light emitting unit is provided on the rear frame in conjunction with a ventilation fan.   The infrared light emitting unit includes an infrared LED and an infrared LED protective cover made of a transparent member, and an upper portion of the infrared LED protective cover projects upward from an exhaust port cover holder attached on the back frame. The cooking device according to claim 5, wherein   The unit on the main body has an operation / display unit for the heating coil and is a stranded wire in which a part of a plurality of wirings connecting two substrates constituting the operation / display unit is twisted. The heating cooker according to claim 1 or 2.

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