JP2008021476A - Heating cooker - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To cool intensively by collecting the cooling air from a cooling fan only to a heat radiation component without using the cooling air wastefully other than for the forced heat radiation component in the main body of an induction heating cooker. <P>SOLUTION: The induction heating cooker comprises induction heating coils right and left 13a, 13b arranged at the upper part in the main body 2, a drive part housing unit 16 which is arranged at the lower part of the induction heating coils right and left 13a, 13b and has an electron control board 20 mounting electron control components built-in, and a cooling fan 15 to cool the electron control components. The forced heat radiation components of the electron control components are arranged in a cooling air passage 26 partitioned from natural heat radiation components by right and left air passage guides 24, 25, and one side of the cooling air passage 26 is made to open toward the cooling fan 15 through air inlet right and left guides 36, 37 opened wide to the cooling fan 15. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a cooling structure for an electronic control board that controls an induction heating coil in an induction heating cooker.

  In the conventional induction heating cooker, the main heating means is an induction heating coil, and the eddy current is generated in the cooking pan placed on the top plate made of heat-resistant glass by the magnetic flux generated thereby, and the cooking pan is heated. To do. This cooker has less heat radiation to the portions other than the cooking pan as compared with a cooking system such as gas, and has good thermal efficiency.

  In terms of configuration, a top plate on which the cooking pan is placed is provided on the upper surface of the main body, an induction heating coil is placed on the upper left and right sides of the main body below the top plate, and an induction heating coil and a resistance heater are also arranged in the center on the rear side. In general, a drive unit storage unit and a roaster unit that store an electronic control board are provided on the lower left and right sides of the heating source via a partition plate.

  The induction heating cooker having such a configuration generates heat not only from the induction heating coil but also from the electronic control board on which the electronic control component is mounted when the cooking pan is heated. Cooling air is blown to cool the electronic control board.

  As an example of the air cooling, there are those described in Patent Document 1 and Patent Document 2, for example.

  In Patent Document 1, a resin drive unit storage case is installed inside a main body, a cooling fan and an electronic control board are arranged inside the storage case, and the rear upper surface of the main body is driven by the cooling fan. Cooling air is sucked into the storage case from the air inlet provided in the housing, and the electronic control board incorporating various electronic components is cooled.

  Moreover, the thing shown in patent document 2 divides a main body case into the part which accommodates a heating coil, the part which accommodates IGBT, a diode bridge, and various capacitors, and the part which accommodates a filter coil, and requires forced cooling. The IGBT and the diode bridge are cooled by a cooling fan, and the other various capacitors and the filter coil are cooled by natural heat radiation, thereby reducing the air volume of the cooling fan and reducing the noise.

JP 2003-86339 A Japanese Patent Laid-Open No. 10-284236

  In the conventional cooling structure described above, the one disclosed in Patent Document 1 has an air passage structure in which the entire inner wall surface of the drive unit storage case cools the cooling fan and the electronic control board. In order to blow cooling air over the entire electronic control board including components, there is a problem that a larger amount of cooling air is required.

  In addition, as shown in Patent Document 2, the cooling structure in which the IGBT and the diode bridge are cooled by a cooling fan and the other various capacitors and the filter coil are cooled by natural heat dissipation is also disposed in the induction heating cooker body. Dividing the entire electronic component into heat radiating components that require forced cooling and those that do not require cooling, and separately delivering them in different storage cases, providing a cooling fan in the heat radiating component storage case, and blowing and cooling only the heat radiating components Therefore, the volume of each storage case can be reduced from the case for storing the entire electronic component, and the required cooling air volume can be reduced accordingly. However, the following problems remain.

  First, because the cooling fan and electronic components that need to be dissipated are separately delivered, the heat dissipating component storage case is larger than the volume of the electronic component that needs to dissipate, and there is a lot of wasted space. It still cannot be cooled and uses more cooling air than necessary.

  In addition, because the entire electronic component is separately delivered in two types, the design and layout of the drive unit becomes difficult, resulting in a large drive unit structure, design and structural limitations, and a large layout of the entire product structure. The current situation is that it has an impact and is not practical.

  The present invention has been made to solve the above-described conventional problems. In claim 1, a top plate provided on the upper surface of the main body, and an induction heating coil disposed below the top plate and in an upper portion of the main body. And an induction heating cooker including a drive unit storage unit that is disposed under the induction heating coil and includes an electronic control board on which the electronic control component is mounted, and a cooling fan that cools the electronic control component. The control component is divided into a forced heat dissipation component and a natural heat dissipation component, and the forced heat dissipation component is placed in the cooling air passage separated from the natural heat dissipation component by the left and right air passage guides, and one side of the cooling air passage is cooled. The cooling fan is opened through a wind inlet guide that is widened toward the fan.

  In claim 2, electronic control boards having electronic control components mounted therein are built in multiple stages in the drive unit housing unit, and cooling air passages in which forced heat dissipation parts are mounted are arranged in each of the multistage substrate cases, One side of the cooling air passage is opened to the cooling fan through a wind inlet guide that is widened toward the cooling fan.

  According to the present invention, in the drive unit storage unit, the electronic control component is divided into a forced heat dissipation component and a natural heat dissipation component, and the forced heat dissipation component is separated from the natural heat dissipation component by the left and right airflow guides. Since the cooling fan is opened to the cooling fan through an air inlet guide that is widened toward the cooling fan, one side of the cooling air passage is designed and laid out in the main body of the induction heating cooker. This eliminates the need for a useless cooling space and collects cooling air from the cooling fan only in the forced heat radiation component and intensively cools it without using waste air other than the forced heat radiation component. The cooling efficiency can be maximized.

  In addition, since the design and structural limitations due to separate delivery of the drive unit as described above can be solved and the required amount of cooling air can be minimized, the drive unit including the cooling fan and the cooling structure can be made compact. In addition, the cooling fan can be driven at a low rotational speed to achieve noise reduction.

  Embodiments of the present invention will be described below with reference to FIGS.

  1 to 4 show an embodiment of the induction heating cooker of the present invention. The cooking device shown in FIG. 1 is a built-in induction heating cooking device provided with pan mounting portions 6a, 6b, and 6c at three locations on the top plate 3, as will be described in detail below.

  In addition, the present Example is not limited to the built-in type that fits in the kitchen, but may be a stationary heating cooker that is placed in the kitchen.

  The main body 2 of the induction heating cooker is incorporated by being dropped from the upper surface of the system kitchen 1 and installed. After the installation, a roaster unit 4 and an operation unit panel 5, which will be described later, can be operated from the front part of the system kitchen 1.

  A cooking pan (not shown) for cooking is placed on a top plate 3 made of heat-resistant glass or the like provided on the upper surface of the main body 2.

  The cooking pan can be cooked by being placed on the placing portion 6 drawn on the top plate 3. The placement portion 6 is provided with a placement portion right 6a and a placement portion left 6b on the front surface side of the top plate 3, and a placement portion center 6c at a substantially central portion on the rear side between the placement portions 6a and 6b. Is arranged. And in the upper part in the main body 2 corresponding to the pan mounting parts 6a, 6b, 6c on the lower surface of the top plate 3, as shown in FIG. 2, the induction heating coil right 13a for heating the cooking pan, the induction heating coil left An induction heating coil 13 composed of 13b and a resistance heater center 13c are respectively installed. The resistance heater center 13c may be an induction heating coil.

  The placement center 6c is a place where it is difficult to reach the user's hand. For this reason, when the cooking pan is placed on the placement unit right 6a and the placement unit left 6b in the foreground, if the hand is extended to the placement unit center 6c, the placement unit right 6a and the placement unit left 6b It is difficult to perform cooking by moving the hand at the placing portion center 6c due to steam generated during cooking from the cooking pan placed. Accordingly, the type of cooking performed at the placing portion center 6c is suitable for cooking that does not require the chef to move much, mainly cooking such as stew or heat retention. In addition, since stew and heat retention require only a small heating power and the maximum power consumption is limited, the heating power of the resistance heater center 13c installed in the mounting portion center 6c is set to the mounting portion right 6a and the mounting portion left 6b. Is set to be weaker than the induction heating coil right 13a and the induction heating coil left 13b, which are installed correspondingly, and to reduce power consumption. Specifically, the induction heating coil right 13a and the induction heating coil left 13b are approximately 3 kW, and the resistance heater center 13c installed in the placement portion center 6c is approximately 1.6 kW.

  Moreover, although not shown in figure to the induction heating coil right 13a and the induction heating coil left 13b, in order to heat a cooking pot, the voltage of several tens kHz and several hundreds V is applied from an inverter means.

  In FIG. 1, a frame 14 for protecting the end surface is provided around the top plate 3. The frame 14 includes a frame front 14a attached to the upper upper edge in front of the top plate 3, a frame rear 14b attached to the rear upper edge of the plate 3, a frame right 14c attached to the right upper edge, and a left upper edge. It is composed of a left frame 14d to be attached. In this example, the frame is divided into 4 pieces, but it can be integrated or 2 pieces or any number of pieces, and it is not necessary to attach it to the 4 sides of the plate 3, only in front of the plate 3, only in the back, front and back Only two sides of the left or right side may be used.

  As shown in FIG. 2, the inside of the main body 2 is partitioned into two stages by a partition plate 17, and the induction heating coil right 13a, the induction heating coil left 13b, and the resistance heater center 13c are provided on the upper side. On the lower side, there are provided a drive unit storage unit 16 and a cooling fan 15 incorporating an electronic control board to be described later for controlling these heat generating units.

  On the right side of the rear upper surface of the main body 2, an air inlet 7 for sucking air from the outside is provided so as to face the cooling fan 15. The intake port 7 is also located on the right side of the exhaust port 8 provided on the left side of the rear upper surface of the main body 2.

  The cooling fan 15 is disposed below the partition plate 17 in the main body 2 and between the air inlet 7 and the rear part of the drive unit storage unit 16. Air sucked from the air inlet 7 by the cooling fan 15 is After cooling the electronic control board in the drive unit storage unit 16, it flows out to the upper surface side of the partition plate 17, cools the induction heating coil right 13 a and the induction heating coil left 13 b on the upper surface, and cools the main body 2 from the exhaust port 8. Discharged outside. Further, waste heat from the roaster section 4 described later is also discharged from the exhaust port 8 at the same time.

  In FIG. 1, the roaster portion 4 is for baking fish, pizza, etc., and is disposed on the left or right side of the front surface of the main body 2 (left side in the present embodiment), so that the degree of baking inside can be seen on the front surface. The roaster door 32 is provided with a handle 11. Note that the roaster section 4 is not dedicated to grilled fish and may be called a grill or an oven.

  9 is an upper surface operation unit, which is composed of a plurality of tact switches, and is provided in the front frame 14a. The heating power adjustment of the induction heating coil right 13a, the induction heating coil left 13b, the resistance heater center 13c, the setting of the cooking timer, cooking Can call menu, set warming and cooking, automatic rice cooking, fried food cooking, start and stop heating, etc., easy on top of main body 2 without operation panel 5 on front of main body 2 Can be operated.

  Reference numeral 10 denotes an upper surface display unit, which is provided on the front side of the top plate 3 along the upper surface operation unit 9. The user can know the thermal power setting, cooking menu, timer value, cooking temperature, etc. set in the upper surface operation unit 9. Display easily.

  Next, with reference to FIGS. 3 and 4, the details of the internal structure inside the drive unit storage unit 16 and the cooling air passage structure will be described.

As shown in FIG. 3, the electronic control boards 20 are arranged in upper and lower multi-stages (three stages in the figure) with appropriate intervals in the drive unit storage unit 16. The details of the electronic control board 20 as an example will be described below. As shown in FIG. 4, the cooling fan 15 is located on the rear side, the exhaust induction port 23 is opened on the front side, and An exhaust outlet 18 is opened in the drive unit storage unit 16.

  In addition, cooling air is guided from the cooling fan 15 to the exhaust induction port 23 side on the upper surface of the electronic control board 20 via a wind inlet right guide 36 and a wind inlet left guide 37 that expand toward the cooling fan 15 side. A cooling air passage 26 is disposed.

The cooling air passage 26 is separated from the others by a right air passage guide 24 and a left air passage guide 25, and the electronic fan is cooled by the cooling fan 15 on the electronic control board 20 in the air passage 26. Necessary forced heat dissipation components, that is, heat sinks 27 and 28, IGBT switching element 29, and diode bridge 30, are mounted, and the filter capacitor 31 is placed on the upper electronic control board 20 outside the right air guide 24 and the left air guide 25. , A smoothing capacitor 32, a resonant capacitor 33, a filter coil 34, a terminal block 35, and the like, which are naturally radiating components that do not require forced radiating.

  Next, FIG. 5 shows another embodiment of the present invention, in which the cooling air passage 26 from the cooling fan 15 side toward the exhaust induction port 23 does not extend straight but meanders in the middle. This is a forced heat dissipation component that requires cooling by the cooling fan 15, that is, heat sinks 27 and 28, IGBT switching element 29, diode bridge 30, filter capacitor 31, smoothing capacitor 32, resonance capacitor 33, filter coil 34, and terminals. This is due to the arrangement position of the natural heat dissipating parts that do not require forced heat radiation, such as the table 35. The forced heat dissipating parts are also mounted in the cooling air passage 26 by this arrangement.

  In these embodiments, the electronic control components mounted on the middle electronic control board 20 have been described. However, these are similarly applied to the upper and lower electronic control boards 20.

  In the present embodiment, an example in which only one cooling air passage 26 from the cooling fan 15 side to the exhaust induction port 23 is disposed on one electronic board 20 has been described. Two or more cooling air passages 26 may be arranged depending on the number of natural heat dissipating parts and the relationship between the arrangement positions.

  A present Example consists of the above structure, Next, the case where a cooking pan is mounted on the mounting part left 6b of the top plate 3, and it heats with the induction heating coil left 13b is demonstrated. Note that the operation of the roaster unit 4 is the same as that of a known one and is not directly related to the present invention, and therefore will be omitted.

  First, after putting a cooking pan on the placement part left 6b of the top plate 3, the power on / off switch of the operation part 5 is turned on.

  Next, the heating output of the induction heating coil left 13b is set, and the heating power adjustment, the setting of the cooking timer, and the cooking menu are called by the upper surface operation unit 9 provided on the front surface of the main body 1 according to the contents to be cooked. Settings such as heat insulation, boiled food, automatic rice cooking, fried food cooking, setting of cooking temperature, start of heating, etc. are performed.

  At this time, the heating power setting, cooking menu, timer value, cooking temperature, etc. set by the upper surface operation unit 9 are displayed on the upper surface display unit 10 so that the user can easily understand.

  When cooking starts, the user puts seasonings and the like in the cooking pan while watching the progress according to the cooking contents, and finishes the seasoning as desired. Cooking is completed by the above operation.

  Next, the flow of cooling air in the drive unit storage unit 16 during this operation will be described.

  As shown in FIGS. 2 and 3, the cooling air that has flowed into the main body 2 from the air inlet 7 as indicated by an arrow by driving the cooling fan 15 flows into the drive unit housing unit 16 from the cooling fan 15.

  At this time, the cooling air blown out from the cooling fan 15 is collected by the air inlet right guide 36 and the air inlet left guide 37 provided so as to expand toward the cooling fan 15, and the right air path guide 24. , Flows into the cooling air passage 26 separated from the others by the left air passage guide 25, cools the heat sinks 27 and 28, the IGBT switching element 29, and the diode bridge 30 which are forced heat dissipation components, and the exhaust induction port 23 and the drive unit. After being discharged from the exhaust outlet 18 of the storage unit 16 and flowing toward the induction heating coil right 13a and the induction heating coil left 13b on the upper surface thereof, the induction heating coil right 13a and the induction heating coil left 13b are cooled, and then the rear part of the main body Are discharged to the outside through the exhaust port 8.

  On the other hand, natural heat radiation components that do not require forced heat radiation, such as the filter capacitor 31, smoothing capacitor 32, resonance capacitor 33, filter coil 34, and terminal block 35, are not forcibly cooled by the cooling air from the cooling fan 15 and are naturally radiated. .

As described above, according to the present invention, the electronic control components mounted on the electronic control board in the drive unit storage unit are heat sinks that are forced heat dissipation components, IGBT switching elements, diode bridges, and natural heat dissipation components. It is divided into filter capacitors, resonant capacitors, filter coils, terminal blocks, etc., and the forced heat radiation component is placed in the cooling air passage separated from the natural heat radiation component by the left and right air passage guides, and one side of the cooling air passage is The cooling fan is opened to the cooling fan through a wind inlet guide that is widened toward the cooling fan. With these configurations, there are no restrictions on design and layout in the body of the induction heating cooker, and it is useless. There is no need to provide a cooling space, and the cooling air from the cooling fan is collected only in the forced heat dissipation component without wasting the cooling air other than the forced heat dissipation component. Cooling can be performed intensively, and cooling efficiency can be maximized. Also, as described above, the design and structural limitations due to separate drive units are solved, and the required cooling air volume is minimized. Therefore, the drive unit including the cooling fan and the cooling structure can be made compact, and the cooling fan can be driven at a low number of revolutions to achieve noise reduction.

It is a perspective view of the state where the induction heating cooking appliance of the present invention was built in the system kitchen. It is a perspective view of the internal structure in the induction heating cooking appliance. It is a perspective view for demonstrating the internal structure of the drive part storage unit. It is a perspective view of one Example of the cooling structure of the drive part accommodation unit. It is a perspective view of the other Example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 2 ... Main body, 3 ... Top plate, 7 ... Intake port, 8 ... Exhaust port, 13a ... Induction heating coil right, 13b ... Induction heating coil left, 15 ... Cooling fan, 16 ... Drive part accommodation unit, 20 ... Electronic control board 24 ... right air guide, 25 ... left air guide, 26 ... cooling air guide, 27 ... heat sink, 29 ... IGBT switching element, 36 ... air inlet right guide, 37 ... air inlet left guide.

Claims (4)

  Built-in top plate provided on the upper surface of the main body, induction heating coil disposed below the top plate in the upper part of the main body, and electronic control board mounted with electronic control components disposed below the induction heating coil In the induction heating cooker comprising a drive unit storage unit and a cooling fan for cooling the electronic control component, the electronic control component is divided into a forced heat dissipation component and a natural heat dissipation component, and the forced heat dissipation component is divided into left and right air paths. It is arranged in a cooling air passage partitioned from natural heat dissipation components by a guide, and one side of the cooling air passage is opened to the cooling fan through an air inlet guide that is expanded toward the cooling fan. Induction heating cooker.   Electronic control boards loaded with electronic control components are built in multiple stages in the drive unit storage unit, and cooling air passages with forced heat dissipation components are arranged in each of the multi-stage board cases, and one side of the cooling air passages The induction heating cooker according to claim 1, wherein the cooling fan is opened through a wind inlet guide that is widened toward the cooling fan.   Built-in top plate provided on the upper surface of the main body, induction heating coil disposed below the top plate in the upper part of the main body, and electronic control board mounted with electronic control components disposed below the induction heating coil In the induction heating cooker comprising the drive unit storage unit and a cooling fan for cooling the electronic control component, the electronic control component provided in the drive unit storage unit is partitioned into a forced heat dissipation component and other components. An induction heating cooker having an air path guide for guiding cooling air to the forced heat dissipation component, and an air inlet guide that is an inlet of the cooling air of the cooling air path formed by the air path guide and extends toward the cooling fan.   The induction heating cooker according to claim 3, wherein the electronic control board on which the electronic control component is mounted is housed in the upper and lower multistages in the drive unit housing unit, and the forced heat radiation component of the electronic control board is in the cooling air passage. Induction heating cooker provided.

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