JP3043127U - Ventilation device for electromagnetic induction heating rice cooker - Google Patents

Abstract

The present invention relates to a ventilation device for an electromagnetic induction heating rice cooker, in which air flows in the direction of an air controller unit and an operation printed circuit board that contain impurities such as dust and water flowing in when a fan rotates. The purpose is to prevent and improve the reliability of the product. SOLUTION: The power printed circuit board is installed under the work coil base assembly of the electromagnetic induction heating cooker, supplies an appropriate power to the work coil, and has a plurality of switching elements installed on the upper surface, and a power printed circuit. A fan fixedly installed on the lower surface of the board for cooling heat generated from a switching element installed on the power printed circuit board, and an air intake port formed under the fan for sucking air from the outside, The duct is fixedly installed on the inner surface of the main body of the air suction port and adjusts the air flow in a predetermined direction, and an air flow guide member whose one end is fixed to one side of the outer surface of the work coil base assembly.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a ventilation device for an electromagnetic induction heating rice cooker, and in particular, prevents the dust and water that are sucked together with the air through the air inlet from flowing into the controller unit and the operating printed circuit board. The present invention relates to a ventilation device for an electromagnetic induction heating rice cooker capable of preventing the malfunction of.

[0002]

[Prior art]

 A general electric rice cooker indirectly heats the rice cooker with an electric heater, while the electromagnetic induction heating rice cooker uses strong magnetic lines of force, so it is possible to generate a strong heating power of 1300W or more compared to the 1000W of a general rice cooker. Is. With such a strong firepower, it is possible to cook with a strong heat in a short time, which has the characteristic of improving the taste of rice. Compared to a general electric rice cooker that heats only the bottom of the rice cooker, the electromagnetic induction heating rice cooker supplies heat to the entire rice cooker, and the uniform convection phenomenon of heat during cooking causes Due to the characteristic that the lower layer can be boiled uniformly, electromagnetic induction heating rice cookers are often used recently.

The structure of a conventional electromagnetic induction heating cooker will be described below with reference to FIG. 1 which is also applied to the present invention. An inner rice cooker 11 made of a special metal is installed at a predetermined portion inside the electromagnetic induction heating rice cooker body 1. The inner rice cooker 11 has a double structure in which the inside is made of aluminum and the outside is made of stainless steel. An oven base 23 that surrounds the outer shell of the inner rice cooker 11 is installed in the lower portion of the inner rice cooker 11. The oven base 23 prevents the electromagnetic induction coil 21 installed at the lower part thereof from making direct contact with the bottom of the inner rice cooker 11, and also serves to guide the inner rice cooker 11. Here, a hole 23a having a predetermined diameter is formed in the center of the oven base 23. A work coil base assembly 4 for fixedly supporting the electromagnetic induction heating coil 21 and the ferrite 20 surrounds the lower portion of the outer portion of the oven base 23 below the oven base 23. Here, the electromagnetic induction coil 21 has a function of generating strong magnetic force lines when power is supplied. The ferrite 20 serves as a kind of magnetic force line reflection device that collects the magnetic force lines generated from the electromagnetic induction coil 21 upward, that is, in the direction of the inner rice cooker 11.

A hole 24 a having a predetermined diameter is formed in a predetermined portion of the work coil 22. Here, a rice cooker sensor assembly 5 including a temperature sensor (not shown) and a weight sensor (not shown) is installed through the holes 23a and 24a. A step portion 5b having a predetermined size is formed at the upper end of the rice cooker sensor assembly 5. The upper end of the step 5b is in contact with the outer bottom of the inner rice cooker 11. A spring 5a is fitted on the central axis of the rice cooker sensor assembly 5. A flange 5c is installed at the bottom of the rice cooker sensor assembly 5. The flange 5c is fixed to the bottom of the work coil base assembly 4. A power printed circuit board 6 for supplying an appropriate power to the electromagnetic induction coil 21 is installed under the work coil base assembly 4. A heat sink, which is a fin-shaped aluminum plate, is installed on one side of the upper surface of the power printed circuit board 6 so that heat is easily dissipated during cooking.

A fan 8 is installed at one side of the lower portion of the power printed circuit board 6 to cool the heat generated from the element 6a installed at the upper end of the power printed circuit board 6. . Below the fan 8, an air suction port 27 is fixedly installed at the bottom of the shuttle body 1 and sucks outside air. Then, the air sucked into the air suction port 27 takes heat from the heat-generating internal element 6a and is discharged through the air discharge port 28 provided on one surface outside the rice cooker.

On the other hand, an operation printing circuit board 26 for controlling the function of the rice cooker and a display unit 19 for displaying the controlled contents are provided at a predetermined portion inside the kettle body 1. A controller 13 including a power transformer (not shown) for changing a high-voltage input power supply to a low voltage and a controller 13 including circuit elements (not shown) for performing various functions is installed under the operation printed circuit board 26. Has been done.

A lid 2 is installed above the inner rice cooker 11. A circular ring-shaped inner cover 14 is fixed to a predetermined portion inside the lid 2 inside the lid 2. A disc-shaped heat insulating plate 15 is fixed to the circumferential surface of the inner cover 14. An oven packing 16 is installed below the inner cover 14. The oven packing 16 is for preventing the contents from boiling and flowing out from the inner rice cooker 11 during cooking. An upper heater assembly 17 that generates a predetermined amount of heat is installed under the heat retaining plate 15, and an outer peripheral edge of the upper heater assembly 17 is coupled to an upper end of the oven packing 16. A hole 17a having a predetermined diameter is formed at the center of the upper heater assembly 17.

An oven cover 30 is installed below the upper heater assembly 17. The upper end of the outer peripheral edge of the oven cover 30 contacts the lower part of the outer peripheral edge of the upper heater assembly 17, and the lower end of the outer peripheral edge of the oven cover 30 contacts the outer peripheral edge of the upper end of the inner rice cooker 11. . A hole 30a having a predetermined diameter is formed at the center of the oven cover 30. Here, the center packing assembly 18 is inserted and installed in the holes 17a and 30a. The center packing assembly 18 is hollow and includes an inverted conical body 18a and a packing bar 18b slidably inserted into the body. An upper end of the packing bar 18b is annular, and a lower end thereof has a head (not shown) having a predetermined diameter. The ring of the upper end of the packing bar 18b is connected to the hole 17a, and the lower end of the packing bar 18b is slidably inserted through a hole (not shown) formed at the end of the body 18a. Here, the center packing assembly 18 discharges a part of the pressure and heat generated from the inner rice cooker 11 during cooking so that the inside of the inner rice cooker 11 is maintained at a predetermined pressure and temperature. Play a role.

One end of the lid 2 is rotatably connected to the hook body 1 by a hinge pin 3. Then, an outer case of the lid 2 is formed, a PCB or the like is placed on the outer portion, and an upper case 12 serving as a supporting role of the lid 2 is placed. Here, a cylindrical heat plate 9 that surrounds the outer upper end of the inner rice cooker 11 is installed. The heat plate 9 serves to guide the inner rice cooker 11, and a heater (not shown) is installed in the heat plate 9 to effectively transfer the heat of the inner rice cooker 11 to the outside during cooking and heat retention. Shut off. A side coil 24 is installed below the electromagnetic induction coil 21, and the side coil 24 is a part of the electromagnetic induction coil 21 and is installed above the electromagnetic induction coil 21. The lower portion of the side coil 24 is joined to the upper end of the oven base 23.

FIG. 5 is a bottom perspective view of a general electromagnetic induction heating rice cooker, in which an air intake port 27 is installed on the outer bottom portion of the cooker body 1. The air suction port 27 has a lid shape having a predetermined diameter, and a plurality of holes for air suction are formed on the surface. FIG. 6 is a bottom perspective view of a general electromagnetic induction heating cooker viewed from another direction. Air sucked through the air suction port 27 is discharged through the air discharge port 28 formed on one surface of the cooker main body 1. It indicates that it is discharged.

The operation of the conventional ventilation device for the electromagnetic induction heating rice cooker having the above-described configuration will be described below. First, when power is supplied to the electromagnetic induction coil 21 in a state where a predetermined amount of rice and water are put in the inner rice cooker 11, the electromagnetic induction coil 21 receives a DC voltage from the outside to continuously vibrate. become. As a result, a resonance current flows through the electromagnetic induction coil 21, and a line of magnetic force is formed around the electromagnetic induction coil due to the generation of the resonance current, and joule heat due to the electromagnetic induction effect of the magnetic line of force is generated. Arises from. At this time, the rice cooker sensor assembly 5 senses the temperature of the inner rice cooker 11 and controls the temperature appropriately so as to produce the best rice taste.

During the use of such an electromagnetic induction heating cooker, a large amount of heat is generated from the element 6a installed on the power printed circuit board 6, and the heat adversely affects other parts. A fan 8 is installed on the power printed circuit board 6 in order to prevent this. That is, during use of the electromagnetic induction heating cooker, the fan 8 rotates to allow air to flow in through the air intake port, and the inflowing air discharges the heat inside the main body 1 to the outside through the air discharge port 28. Play a role.

[0013]

[Problems to be solved by the device]

 However, in the general electromagnetic induction heating cooker as described above, the air sucked by the rotation of the fan 8 contains a large amount of impurities such as dust and water, and the impurities are sucked together with the air, and the controller part is sucked. If it is adhered to the controller 13, the controller 13 cannot fully exhibit this function, causing a malfunction in the function of the rice cooker, which seriously reduces the reliability of the product. .

In addition, when the impurities and the like flow into the display unit 19 which can confirm the usage state of the electromagnetic induction heating cooker, the transparency of the display unit 19 is deteriorated and the visibility is deteriorated. It acted as a factor that reduces reliability. Therefore, the main purpose of the present invention is to prevent the air inflowing by the rotation of the fan installed inside the rice cooker in the direction of the controller part and the operation printed circuit board, thereby preventing dust. It is possible to prevent the possibility that impurities such as water and moisture will flow in together with air and adhere to the controller section and the power supply control section and cause a failure of the electromagnetic induction heating cooker, thereby further improving the reliability of the product. An object of the present invention is to provide a ventilation device for an electromagnetic induction heating rice cooker.

Another object of the present invention is to improve the reliability of the product by improving the transparency of the display part by fundamentally preventing the impurities that are introduced with the air from entering the display part. The purpose of the present invention is to provide a ventilation device for an electromagnetic induction heating rice cooker.

[0016]

[Means for Solving the Problems]

 In order to achieve such an object, the present invention is installed in the lower part of the work coil base assembly of the electromagnetic induction heating cooker, supplies an appropriate power to the work coil, and installs multiple switching elements on the upper surface. A power printed circuit board, a fan fixedly installed on the lower surface of the power printed circuit board, for cooling heat generated from the switching elements installed on the power printed circuit board, and a fan formed under the fan. Part for sucking in air, a duct fixedly installed on the inner surface of the pot main body of the air intake port for adjusting the air flow in a predetermined direction, and one end of the work coil base assembly outer surface. And an air flow guide member fixed to one side.

[0017]

[Embodiment of the invention]

 Hereinafter, a ventilation device for an electromagnetic induction heating rice cooker according to the present invention will be described based on an embodiment shown in the accompanying drawings. FIG. 1 is a sectional view showing a combined state of an electromagnetic induction heating rice cooker provided with a ventilation device according to the present invention. Since most of the structure is similar to the electromagnetic induction heating rice cooker of the prior art, the overlapping portion is not shown. A detailed description is omitted, and the structure of the air flow guide member 31 according to the present invention will be described below.

First, the air flow guide member 31 according to the present invention has a shape in which a container whose lower part is closed and whose upper part is opened is half-cut in the vertical direction. The air flow guide member 31 includes a horizontal portion 33 and an air guide portion 32. A plurality of grooves 33a are formed at the straight edge portion of the horizontal portion 33 in order to avoid interference when various buses connected to the work coil base 22 are installed. A protrusion 34 including a screw insertion hole 34a is formed on one side of the horizontal portion 33. The screw insertion hole 34a is screwed with the fixed protrusion 4a formed on the work coil base 22. A step portion 33b having a predetermined height and width is formed at a corner portion of the horizontal portion in order to avoid interference with other components (not shown) during installation.

As shown in FIG. 2, when the airflow guide member 31 is installed, the horizontal portion 33 is directed toward the bottom of the controller portion 13, and the air guide portion 32 is installed outside the rice cooker. To be done. The operation of the ventilation device for the electromagnetic induction heating rice cooker according to the present invention constructed as above will be described below with reference to FIGS.

First, when power is applied to the electromagnetic induction heating rice cooker, the cooking function is executed by a normal method, and at the same time, in order to cool the heat generated from the element 6a of the power printed circuit board 6, etc. The fan 8 rotates. The air containing impurities such as dust and water sucked in through the air suction port 27 flows into the inside of the pot main body 1 by the guide of the duct 29. A part of the inflowing air does not flow into the controller unit 13, the operation printed circuit board 26 and the display unit 19 under the guidance of the air guiding unit 32, but directly through the air exhaust port 28 while directly cooling the element 6a through the heat sink 7. It is discharged to the outside.

[0021]

[Effect of the invention]

 As described above, according to the present invention, the controller unit, the operation printed circuit board, and the display unit are shielded from the outside air by the air flow guide member according to the present invention, so that there are various harmful effects due to impurities such as dust and water. Can be prevented.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing an arrangement state of an electromagnetic induction heating rice cooker provided with a ventilation device according to the present invention.

FIG. 2 is a bottom perspective view of the electromagnetic induction heating cooker provided with the ventilation device according to the present invention with the bottom plate removed.

FIG. 3 is a perspective view of an air flow guide member that constitutes the ventilation device of the electromagnetic induction heating rice cooker according to the present invention.

FIG. 4 is a sectional view showing an arrangement state of a general electromagnetic induction heating cooker.

FIG. 5 is a bottom perspective view of a general electromagnetic induction heating cooker.

FIG. 6 is a bottom perspective view of a general electromagnetic induction heating cooker viewed from another direction.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Kettle main body 2 ... Lid 3 ... Hinge pin 4 ... Work coil base assembly 4a ... Fixed protrusion 5 ... Rice cooker sensor assembly 5a ... Spring 5b ... Step 6 ... Power printed circuit board 6a ... Element 7 ... Heat sink 8 ... Cooling fan 9 ... Heat plate 10 ... Heat cover 11 ... Inner rice cooker 12 ... Upper case 13 ... Controller part 14 ... Inner cover 15 ... Heat insulating plate 16 ... Oven packing 17 ... Upper heater assembly 17a, 23a, 24a, 30a ... Hole 18 ... Center packing assembly 18a ... Main body 18b ... Packing bar 19 ... Display part 20 ... Ferrite 21 ... Electromagnetic induction coil 22 ... Work coil base 23 ... Oven base 24 ... Side coil 25 ... Battery 26 ... Operation printed circuit board 27 ... Air Inlet port 28 ... Air outlet port 29 ... DOO 30 ... oven cover 31 ... air flow guiding member 32 ... air guide 33 ... horizontal section 33a ... groove 33b ... stepped portion 34 ... projecting portion 34a ... screw insertion hole 36 ... fixing screws

Claims (5)

[Utility model registration claims] 1. A power printed circuit board installed on the lower part of a work coil base assembly (4) of an electromagnetic induction heating cooker, supplying an appropriate power to the work coil, and having a plurality of switching elements installed on the upper surface ( 6) and fixedly installed on the lower surface of the power printed circuit board (6),
A fan (8) for cooling heat generated from a switching device installed on the power printed circuit board (6), and an air intake port formed under the fan (8) for sucking air from the outside. (27) and a duct (2) fixedly installed on the inner surface of the main body (1) of the air intake port (27) for adjusting the air flow in a predetermined direction.
9) and an air flow guide member (31), one end of which is fixed to one side of the outer surface of the work coil base assembly (4), which is a ventilation device for an electromagnetic induction heating cooker. 2. In the air flow guide member (31), the air introduced through the air intake port (27) flows into the controller unit (13), the operation printed circuit board (26) and the display unit (19). And an air guide part (32) for preventing the above, and a horizontal edge that supports the air guide part (32) and includes a plurality of grooves (33a) in the straight edge part and a protrusion part (34) at one end of the straight edge part. The ventilation device for an electromagnetic induction heating rice cooker according to claim 1, wherein the ventilation device comprises a part (33). 3. The ventilation of the electromagnetic induction heating cooker according to claim 2, wherein the groove (33a) is configured to avoid interference with a bus connected to the work coil base (22). apparatus. 4. The screw insertion hole (3) is formed in the protrusion (34).
4a) is formed and the work coil base assembly (4) is formed.
The ventilation device for an electromagnetic induction heating rice cooker according to claim 2, wherein the ventilation device is screwed into a fixed protrusion (4a) formed at one end of the. 5. The stepped portion (33b) having a predetermined width is formed at a portion where the horizontal portion (33) and the air guide portion (32) are in contact with each other.
Ventilation device for the electromagnetic induction heating rice cooker described in.