JP5542563B2 - Cooker - Google Patents

Description

  Embodiments according to the present invention relate to a cooking device.

  Electrical parts are stored in the gap between the outer box as the outer shell and the bottom of the inner box that defines the heating chamber, and the cooling air is taken in from the air intake located at the bottom center of the outer box or at the rear of the bottom. Heating cookers that cool parts are known.

JP 2006-177593 A JP 2009-8297 A

  In recent years, a cooking device that can be installed with its back and side surfaces in contact with the wall surface of the installation location is preferred so that the installation location can be used as effectively as possible.

  In this way, when the side surface and back surface of the heating cooker are installed in contact with the wall surface of the installation place, it is necessary to appropriately cool the electrical components such as the magnetron, the inverter circuit, and the control circuit board constituting the heating cooker. .

  However, in a cooking device that cools electrical components by taking in air for cooling from the air intake located at the center of the bottom of the outer box or at the rear of the bottom, install the back and side surfaces in contact with the wall of the installation location. Then, hot air stays between the outer box and the wall surface of the installation place, and this hot air is taken in from the air intake, so that the electrical components cannot be cooled appropriately.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a heating cooker that can take in fresh air and cool an electrical component even if it is installed with its back and side surfaces in contact with the wall surface of the installation location.

In order to solve the above problems, a heating cooker according to an embodiment of the present invention includes a rectangular outer box having an air intake opening opened at the front edge of the bottom surface and an open front, and is accommodated in the outer box. A rectangular inner box that divides the heating chamber whose front is opened, and is placed in one of the left and right sides in a gap between the outer box and the bottom surface of the inner box, and is placed in the heating chamber. A heating unit that irradiates a wave; a first fan that is arranged on the front side or the rear side of the heating unit and generates cooling air from the front to the back of the gap around the heating unit; and a gap between the bottom surface An inverter circuit board that is housed and arranged on either the left or right side to supply power to the heating unit, and is arranged on the front side or rear side of the inverter circuit board and around the inverter circuit board from the front of the gap Generates cooling air to the rear A second fan for, a duct for guiding cooling air which has cooled the inverter circuit board covering the inverter circuit board into the gap between the side surfaces of the outer box and the left or right other side of the inner box, the gap between the side surface A lighting device that illuminates the heating chamber and is disposed in a gap between the side surfaces, a temperature sensor that detects a temperature in the heating chamber, and is connected to the duct and extends upward through the gap between the side surfaces. And a second duct that covers the lighting device and the temperature sensor .

The front view which showed the heating cooker which concerns on embodiment of this invention. The bottom view which showed the heating cooker which concerns on embodiment of this invention. The bottom view which removed and showed the baseplate from the heating cooker which concerns on embodiment of this invention. Sectional drawing which showed the heating cooker which concerns on embodiment of this invention in IV-IV of FIG. Sectional drawing which showed the heating cooker which concerns on embodiment of this invention in VV of FIG. Sectional drawing which showed the hot air fan and motor of the heating cooker which concerns on embodiment of this invention. The side view which showed the circulation condition of the cooling air in the installation state of the heating cooker which concerns on embodiment of this invention.

  Hereinafter, an embodiment of a heating cooker according to the present invention will be described with reference to FIGS. 1 to 7.

  FIG. 1 is a front view showing a heating cooker according to an embodiment of the present invention.

  As shown in FIG. 1, the heating cooker 1 according to the present embodiment partitions a rectangular outer box 3 whose front surface is opened and a heating chamber 5 which is housed in the outer box 3 and whose front surface is opened. A rectangular inner box 6, and an outer box 3 and a door 7 of the heating chamber 5 that closes the front of the inner box 6 and can be opened and closed up and down are provided.

  The door 7 includes a handle portion 8 provided at the upper front portion, and an operation panel 12 including a plurality of operation portions 9 provided at the lower front portion and a display portion 11 provided along with the operation portion 9.

  The operation unit 9 is for setting heating conditions such as the cooking menu of the heating cooker 1, the heating duration (cooking time), and the temperature of the heating chamber 5 during cooking (cooking temperature). The operation unit 9 includes a main power switch 13.

  The display unit 11 is for displaying the selected cooking menu, the heating conditions such as the set cooking time and cooking temperature, and the cooking function.

  FIG. 2 is a bottom view showing the cooking device according to the embodiment of the present invention.

  As shown in FIG. 2, the heating cooker 1 includes a bottom plate 15 that constitutes a bottom surface of the outer box 3, and an air intake that is opened at the bottom front edge portion of the outer box 3 (that is, the front edge portion of the bottom plate 15). It has an inlet 16. The air intake port 16 is at least one opening formed over substantially the entire width of the bottom plate 15, and in this embodiment, is an opening group composed of a plurality of slit-like openings.

  FIG. 3 is a bottom view showing the cooking device according to the embodiment of the present invention with the bottom plate removed.

  As shown in FIG. 3, the heating cooker 1 according to the present embodiment is accommodated in a gap 17 between the bottom surfaces of the outer box 3 and the inner box 6 and is arranged on either the left or right side (here, the right side) and heated. A magnetron 18 (heating unit) that irradiates microwaves into the chamber 5, and cooling air that is arranged on the front side or the rear side (here, the front side) of the magnetron 18 and moves from the front to the back of the gap 17 around the magnetron 18 (see FIG. 3, a magnetron fan 19 (first fan) that generates a solid line arrow W <b> 1) and a left and right other side (here, left side) accommodated in a gap 17 between the bottom surfaces to supply power to the magnetron 18. The inverter circuit board 21 and the cooling air which is arranged on the front side or the rear side of the inverter circuit board 21 and goes from the front to the rear of the gap 17 around the inverter circuit board 21 (solid arrow W2 in FIG. 3) The inverter circuit fan 22 (second fan) to be generated, and the cooling air that covers the inverter circuit board 21 and cools the inverter circuit board 21 are provided on the left and right sides (here, the left side) of the outer box 3 and the inner box 6. A bottom duct 26 (duct) leading to the gap 25 therebetween, and a heat insulating material 27 provided between the bottom duct 26 and the inner box 6 are provided.

  The bottom duct 26 includes a communication port 29 communicated with a side duct 28 (second duct) disposed in the gap 25 between the side surfaces, and an opening 31 that directly sends cooling air to the gap 25 between the side surfaces. Have.

  The heat insulating material 27 blocks heat transmitted from the heating chamber 5 to the inverter circuit board 21.

  The heating cooker 1 oscillates the magnetron 18 to irradiate the heating chamber 5 with microwaves, and microwaves the object to be heated in the heating chamber 5 to perform food cooking. At this time, electronic components (not shown) of the inverter circuit board 21 that supplies power to the magnetron 18, such as an IGBT (not shown), generate heat due to switching loss, and the magnetron 18 itself generates heat due to oscillation loss. Therefore, the heating cooker 1 includes a magnetron fan 19 that mainly cools the magnetron 18 and an inverter circuit fan 22 that mainly cools the inverter circuit board 21, and suppresses temperature rise due to heat generated by each device.

  The heating cooker 1 also includes a control circuit board 33 that is housed in the gap 17 between the bottom surfaces and disposed in front of the magnetron fan 19 and the inverter circuit fan 22 and in the vicinity of the air intake 16. The control circuit board 33 includes a control circuit (not shown) that is activated when power is supplied by turning on the main power switch 13 of the operation unit 9. The control circuit performs display control of the display unit 11 and drive control of the magnetron 18 based on a cooking menu program stored in a memory (not shown).

  The control circuit board 33 generates heat by performing control such as display control of the display unit 11 and drive control of the magnetron 18. Therefore, the heating cooker 1 takes air from the air intake 16 opened at the front edge of the bottom plate 15 and sucks the air into the magnetron fan 19 or the inverter circuit fan 22 in the process of sucking the air into the air intake 16. And the control circuit board 33 disposed between the fans 19 and 22 are cooled.

  FIG. 4 is a cross-sectional view showing the cooking device according to the embodiment of the present invention in IV-IV of FIG. 3.

  As shown in FIG. 4, the heating cooker 1 according to the present embodiment is arranged in the gap 25 between the left and right side surfaces (here, the left side) of the outer box 3 and the inner box 6 and is inside the heating chamber 5. Illuminating device 35, a temperature sensor 36 disposed in the gap 25 between the side surfaces to detect the temperature in the heating chamber 5, and connected to the bottom duct 26 to extend upward through the gap 25 between the side surfaces and the illuminating device 35. And a side duct 28 that covers the temperature sensor 36.

  The illuminating device 35 illuminates the inside of the heating chamber 5 so that the state of the object to be heated can be confirmed, and through a punching hole (not shown) so as not to be affected by the microwave irradiated to the heating chamber 5. It arrange | positions in the clearance gap 25 between side surfaces.

  The temperature sensor 36 is an infrared sensor that uses the entire inside of the heating chamber 5 as a detection region. The temperature signal output from the temperature sensor 36 changes according to the surface temperature of the object to be heated in the heating chamber 5. The temperature sensor 36 is electrically connected to the control circuit board 33.

  The illumination device 35 generates heat by light emission, and the temperature sensor 36 is heated by the heat in the heating chamber 5. Therefore, the heating cooker 1 sends the cooling air (in FIG. 4, solid line arrow W3) that has cooled the inverter circuit board 21 from the bottom duct 26 to the lighting device 35 and the temperature sensor 36 through the side duct 28, and cools them. .

  The cooking device 1 includes a lock mechanism 38 that is disposed in the gap 25 between the side surfaces and restricts the opening and closing of the door 7. The lock mechanism 38 regulates opening and closing with the door 7 closed in order to prevent inadvertent opening and closing by the user when the inside of the heating chamber 5 is heated. The lock mechanism 38 includes a micro switch (not shown) that detects the open / closed state of the door 7.

  And the heating cooker 1 cools the locking mechanism 38 (more specifically, a micro switch) by the cooling air (solid line arrow W4 in FIG. 4) sent into the clearance 25 between the side surfaces from the opening 31 of the bottom duct 26. .

  FIG. 5 is a cross-sectional view showing the heating cooker according to the embodiment of the present invention in VV of FIG. 3.

  As shown in FIG. 5, the heating cooker 1 according to this embodiment includes a hot air fan 41 provided in the heating chamber 5 and a heater 42 provided in the heating chamber 5 and disposed around the hot air fan 41. And a motor 46 that is housed in a gap 45 between the back surfaces of the outer box 3 and the inner box 6 and drives the hot-air fan 41. The hot air fan 41 is a centrifugal fan arranged in the vicinity of the back surface of the inner box 6.

  The hot air fan 41 and the heater 42 are accommodated in a convex portion 48 in which the back surface of the inner box 6 protrudes toward the outer box 3, and does not interfere with the heated object accommodated in the heating chamber 5. On the other hand, the motor 46 is accommodated in a convex portion 49 that protrudes the rear surface of the inner box 6 outward.

  The heating cooker 1 heats the heater 42 and rotates the hot air fan 41 to circulate hot air in the heating chamber 5 to perform grill cooking or oven cooking by electric heating. At this time, the motor 46 itself generates heat.

  On the other hand, the outer box 3 of the cooking device 1, more specifically, the bottom plate 15, has a recessed step portion 15 a at the front end. The air intake port 16 is opened on each surface constituting the step portion 15 a and takes air into the gap 17 between the bottom surface from the lower front surface of the heating cooker 1. The magnetron fan 19 cools the magnetron 18 with the air taken into the gap 17 from the air intake port 16 and guides the air that has cooled the magnetron to the gap 45 between the back surfaces.

  And the heating cooker 1 guides the cooling air which cooled the magnetron 18 to the clearance gap 45 between back surfaces, and cools the motor 46. FIG.

  The heating cooker 1 also includes an exhaust cover 51 provided on the upper back of the outer box 3.

  The air that has been taken in from the air intake 16 and has cooled the control circuit board 33, magnetron 18, inverter circuit board 21, lock mechanism 38, lighting device 35, temperature sensor 36, and motor 46 joins in the gap 45 between the back surfaces, The gas is discharged from the gap between the outer box 3 and the inner box 6 through the exhaust port 53 opened at the upper back of the outer box 3.

  The exhaust cover 51 covers the exhaust port 53 and has an air outlet that protrudes upward from the top surface of the outer box 3, and the air discharged from the gap between the outer box 3 and the inner box 6 Along the top, it is directed to the front side of the heating cooker 1.

  FIG. 6 is a cross-sectional view showing a hot air fan and a motor of the cooking device according to the embodiment of the present invention.

  As shown in FIG. 6, the heating cooker 1 according to this embodiment includes a frustoconical convex portion 55 that protrudes toward the heating chamber 5 on the back surface of the inner box 6, and a drive shaft approximately at the center of the convex portion 55. The motor 46 in which the 46a is arranged, and the motor fan 56 that is fixed to the drive shaft 46a so as to rotate integrally and are accommodated in the convex portion 55 are provided.

  The hot air fan 41 disposed in the heating chamber 5 has a thickness in the direction of the rotation axis substantially equal to the protruding height of the convex portion 55.

  The heating cooker 1 guides the cooling air that has cooled the magnetron 18 to the gap 45 between the back surfaces to cool the motor 46, and simultaneously cools the motor 46 by the motor fan 56 that rotates together with the hot air fan 41.

  FIG. 7 is a side view showing a circulation state of the cooling air in the installed state of the heating cooker according to the embodiment of the present invention.

  The heating cooker 1 according to the present embodiment shown in FIG. 7 is arranged with its side surface and back surface in contact with the wall surface T of the installation location. When the cooking device 1 is operated in this installed state (food cooking by microwave heating or grill cooking operation or oven cooking operation by electric heating), as shown by the solid and broken arrows in FIG. The air is taken in from the air intake port arranged in the air, and the gap between the outer box 3 and the inner box 6 is appropriately flowed and heated along the top surface of the outer box 3 from the exhaust cover 51 provided at the upper back. Exhaust to the front side of cooker 1.

In general, air heated, so specific gravity rather increases light than cold air, the cooking device 1 takes the front lower or bottom front of the air is cold atmosphere relatively, the control circuit board 33, a magnetron 18, the electric components such as the inverter circuit board 21, the lock mechanism 38, the illumination device 35, the temperature sensor 36, and the motor 46 are cooled, and the air warmed by the cooling is exhausted above the cooking device 1, particularly, the front upper side. That is, according to the heating cooker 1 according to the present embodiment, the air once used for cooling is suppressed from being mixed with the air below the front or the front of the bottom, and heat is not accumulated.

  Moreover, according to the heating cooker 1 which concerns on this embodiment, cooling independent of the magnetron 18 is attained by covering the inverter circuit board 21 with the bottom part duct 26, and the freedom degree on thermal design improves.

  Furthermore, according to the cooking device 1 according to the present embodiment, the control circuit board 33 having a large number of semiconductor elements generally having severe thermal constraints (a narrow usable temperature range) is affected by other electronic components. It can be reliably cooled.

  Furthermore, according to the heating cooker 1 according to the present embodiment, the cooling air can be reliably guided to the lighting device 35 and the temperature sensor 36 by the side duct 28, and the pressure around the lighting device 35 and the temperature sensor 36 can be cooled. And the influence of hot air flowing from the heating chamber 5 can be reduced.

  Further, according to the heating cooker 1 according to the present embodiment, the magnetron fan 19 is used for cooling the magnetron 18 during the food cooking operation by microwave heating, and the grill cooking operation or the oven cooking operation by electric heating is performed. The magnetron fan 19 can be used for cooling the motor 46.

  Furthermore, according to the heating cooker 1 according to the present embodiment, the exhaust air is exhausted along the top surface of the outer box 3, so that the top surface of the outer box 3 can be suppressed from becoming extremely hot.

  Therefore, according to the heating cooker 1 which concerns on embodiment of this invention, even if it installs a back surface and a side surface in contact with the wall surface of an installation place, it can take in fresh air and can cool an electrical component.

  Although several embodiments of the present invention have been described, these embodiments are presented by way of example and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

DESCRIPTION OF SYMBOLS 1 Heating cooker 3 Outer box 5 Heating chamber 6 Inner box 7 Door 8 Handle part 9 Operation part 11 Display part 12 Operation panel 13 Main power switch 15 Bottom plate 15a Step part 16 Air intake port 17 Clearance 18 Magnetron 19 Magnetron fan 21 Inverter circuit board 22 Inverter circuit fan 25 Clearance 26 Bottom duct 27 Heat insulating material 28 Side duct 29 Communication port 31 Opening 33 Control circuit board 35 Illumination device 36 Temperature sensor 38 Lock mechanism 41 Hot air fan 42 Heater 45 Clearance 46 Motor 46a Drive shaft 48 Convex 49 Convex 51 Exhaust Cover 53 Exhaust Port 55 Convex 56 Motor Fan

Claims (4)

A rectangular outer box having an air intake opening opened at the front edge of the bottom surface and having the front opened;
A rectangular inner box that divides a heating chamber housed in the outer box and whose front is opened;
A heating unit that is accommodated in a gap between the bottoms of the outer box and the inner box and is arranged on either the left or right side to irradiate microwaves into the heating chamber;
A first fan that is arranged on the front side or the rear side of the heating unit and generates cooling air from the front to the back of the gap around the heating unit;
An inverter circuit board that is housed in a gap between the bottom surfaces and is arranged on either the left or right side to supply power to the heating unit;
A second fan that is arranged on the front side or rear side of the inverter circuit board and generates cooling air from the front to the back of the gap around the inverter circuit board;
A duct that covers the inverter circuit board and guides the cooling air that has cooled the inverter circuit board to the gap between the outer box and the left or right side of the inner box, and
A lighting device disposed in a gap between the side surfaces to illuminate the heating chamber;
A temperature sensor arranged in a gap between the side surfaces to detect the temperature in the heating chamber;
A heating cooker comprising: a second duct connected to the duct and extending upward through a gap between the side surfaces and covering the lighting device and the temperature sensor . A hot air fan provided in the heating chamber;
A motor that is housed in a gap between the back surface of the outer box and the inner box and drives the hot air fan,
The cooking device according to claim 1, wherein the motor is cooled by guiding cooling air that has cooled the heating unit to a gap between the back surfaces. 3. The control circuit board according to claim 1, further comprising a control circuit board that is accommodated in a gap between the bottom surfaces and is disposed in front of the first fan and the second fan and in the vicinity of the air intake port. Cooking cooker. Comprising a bottom plate constituting the bottom surface of the outer box,
The cooking device according to any one of claims 1 to 3 , wherein the air inlet is at least one opening formed over substantially the entire width of the bottom plate.

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