JP5300620B2 - Electromagnetic induction heating cooker - Google Patents

Description

  The present invention relates to an electromagnetic induction heating cooker.

  In the conventional induction heating device, the sirocco fan housed in the housing part of the circuit part is configured to raise the air sucked from the air intake and exhaust grille having a large number of ventilation holes arranged in the air intake port at the rear of the top frame from the air blower opening. Air is blown to the substrate, the middle substrate, and the lower substrate, and the heat sink provided on the substrate and the substrate is cooled (for example, see Patent Document 1).

Japanese Patent No. 3997895 (page 6, FIG. 4)

In the conventional induction heating device, dust or moisture etc. enters the intake port through the intake / exhaust grill, or when the intake / exhaust grill is removed from the intake port for cleaning, the dust or moisture is inhaled by mistake. May drop in your mouth. Then, there is a problem that dust, moisture, or the like that has entered the air inlet may adhere to these substrates from the air outlet by a sirocco fan, leading to a failure of the substrate.
The present invention has been made to solve such a problem, and obtains an electromagnetic induction heating cooker that prevents dust, moisture, and the like entering an intake port from adhering to a substrate to be cooled even by blowing air from a blower. With the goal.

An electromagnetic induction heating cooker according to the present invention includes a main body case in which a grill heating chamber is formed, a top plate provided on an upper surface of the main body case, and an upper and lower position in the upper surface of the grill heating chamber. A partition plate partitioned into a main body case, at least one of a right side and a left side of the grill heating chamber, extending in the front-rear direction, and provided separately from the grill heating chamber, In the main body case, at least one induction heating type heat source disposed in the upper space of the partition plate is provided, and the cooling chamber is provided with a blower inside, and an outside air suction port and an air outlet, and air path unit anda substrate storage case housing a circuit board inverter circuit of the induction heating type heat source is mounted together with the cooling air exhausted from該風Ro unit is introduced Installed in lower than communicating port for communicating to the inside from the suction opening of the air passage unit, dust and water containing portion of the pocket-like provided in suction write port side, the dust and water storage unit, the air duct A storage portion forming rib extending toward the communication port is formed so as to narrow the communication port from an inner wall located below the suction port in the unit .

  In the electromagnetic induction heating cooker according to the present invention, the main body case is partitioned in at least one of the right side and the left side of the grill heating chamber, extends in the front-rear direction, and is provided in a cooling chamber provided separately from the grill heating chamber. Since there is a pocket-shaped dust / moisture storage part on the suction port side below the communication port that communicates from the suction port of the installed air channel unit to the inside, countless communication that covers the ventilation port that communicates with the intake port If dust or moisture enters the air inlet through the cover with holes, or if dust or water is accidentally dropped into the air inlet when the cover is removed for cleaning, the air inlet When the blower in the air channel unit is driven under normal operating conditions by storing the dust or moisture that has entered into the dust / moisture storage unit, external air is drawn from the air inlet of the air channel unit. internal Even if the sucked air enters the circuit board storage case that stores the circuit board from the air outlet by the blower through the communication port that communicates with the air passage unit, dust or moisture that enters the air intake port It no longer adheres to the circuit board in the board storage case and leads to failure of the circuit board.

The perspective view of the state which decomposed | disassembled some electromagnetic induction heating cooking appliances which concern on Embodiment 1 of this invention. The perspective view which shows the whole main-body part except the central heating source in the state which removed the top plate part of the same electromagnetic induction heating cooking appliance. The disassembled perspective view which shows a board | substrate cooling unit etc. in the state which removed main components, such as the upper and lower partition plates of the same electromagnetic induction heating cooking appliance. The disassembled perspective view of the board | substrate cooling unit of the electromagnetic induction heating cooking appliance. The perspective view which shows the air path unit of the board | substrate cooling unit of the electromagnetic induction heating cooking appliance. The VV sectional view taken on the line of FIG. The block diagram of the alerting | reporting circuit which alert | reports the state which refuse, the water | moisture content, etc. accumulated in the board | substrate cooling unit of the electromagnetic induction heating cooking appliance concerning Embodiment 2 of this invention.

Embodiment 1 FIG.
1 is a perspective view of a state in which a part of the electromagnetic induction heating cooker according to Embodiment 1 of the present invention is disassembled, and FIG. 2 is a central heating source in a state in which the top plate portion of the electromagnetic induction heating cooker is removed. FIG. 3 is an exploded perspective view showing the substrate cooling unit and the like with main components such as the upper and lower partition plates of the electromagnetic induction heating cooker removed, and FIG. 5 is an exploded perspective view of the substrate cooling unit of the induction heating cooker, FIG. 5 is a perspective view showing an air path unit of the substrate cooling unit of the electromagnetic induction heating cooker, and FIG. 6 is a cross-sectional view taken along the line VV of FIG.
As shown in FIG. 1, the electromagnetic induction heating cooker according to the embodiment of the present invention is configured around a substantially rectangular main body A. There is a top plate portion B (reference numerals 20 and 21 in the figure) on the upper surface of the main body part A, and the periphery other than the upper surface of the main body part A is surrounded by a casing C (reference numeral 2 in the figure). .

In FIG. 1, the top plate portion B is composed of an upper frame (also referred to as a frame) 20 and a top plate 21 attached to the opening of the upper frame 20.
The upper frame 20 is formed in a frame shape from a metal plate such as a nonmagnetic stainless steel plate or an aluminum plate, and has a size so as to close the upper surface opening of the main body case 2. The upper frame 20 is fixed to the main body case 2 with a fixing tool such as a screw.
In addition, the top plate 21 is placed so as to cover a large opening provided in the center of the upper frame 20.
In addition, the top plate 21 is placed so as to cover a large opening provided in the center of the upper frame 20. The top plate 21 is entirely made of a translucent material that transmits infrared rays, such as heat-resistant tempered glass or crystallized glass, and is formed in a rectangular or square shape according to the shape of the opening of the upper frame 20.

Further, in FIG. 1, 20 </ b> A is a right vent hole that is punched and formed at the same time by a press machine when the upper frame 20 is formed, and serves as an intake port of a blower 39 described later. Similarly, 20B is a central ventilation hole punched and formed when the upper frame 20 is formed, and 20C is a left ventilation hole similarly punched and formed when the upper frame 20 is formed. On these three ventilation openings 20A, 20B, and 20C, a metal plate-like cover 130 in which countless small communication holes are formed so as to cover the entire upper part is detachably mounted.
As shown in FIG. 1, circular guide marks 6LM, 6RM, and 7M indicating rough positions of the left and right IH coils 6LC and 6RC and the central heating source 7 are respectively formed on the top surface of the top plate 21 by printing or the like. It is displayed.

Further, an integrated liquid crystal display unit 100 is provided at the center in the left-right direction of the top plate 21 and on the front side in the front-rear direction, and liquid crystal display units 44 </ b> L and 44 </ b> R are provided on the left and right sides of the integrated liquid crystal display unit 100.
The integrated liquid crystal display device 101 is disposed below the integrated liquid crystal display unit 100, and the liquid crystal display devices 45L and 45R are disposed below the liquid crystal display units 44L and 44R.
The integrated liquid crystal display device 101 can input and confirm normal states (heating power, time, etc.) of the left and right IH coils 6LC and 6RC, the central heating source 7 and the heater of the grill heating chamber 9, and the like.
In addition, when the left and right liquid crystal display devices 45L and 45R operate the timer switches in the left and right IH coils 6LC and 6RC for timer cooking, the elapsed time from the start time is measured and displayed numerically.

  Inside the main body case 2 of the main body A, two front left and right IH coils 6LC, 6RC, which are induction heating sources for induction heating the heated object N of a metal pan placed on the top plate 21, and A central heating source 7 called a radiant heater, for example, a central heating source 7 that is heated by electric radiant heat, a control device that controls cooking conditions of these heating sources, an operating means for inputting cooking conditions to the control device, An integrated liquid crystal display device 101 that displays the operating conditions of the heating means input by the operating means is provided.

As shown in FIG. 2, the inside of the main body case 2 is roughly divided into a right cooling chamber 8 </ b> R, a left cooling chamber 8 </ b> L, a box-shaped grill heating chamber 9, an upper component chamber 10, and a rear center. The exhaust chamber 12 is partitioned. These rooms are not completely isolated from each other. For example, the right cooling chamber 8R, the left cooling chamber 8L, the upper part chamber 10, and the exhaust chamber 12 communicate with each other.
The grill heating chamber 9 is a substantially independent sealed space when the door 13 to be described later is closed, but communicates with the external space of the main body case 2 via the exhaust duct 14, that is, the indoor space such as a kitchen. Yes.
The front opening of the grill heating chamber 8 is covered with a door 13 so as to be opened and closed, and the door 13 is held by a support mechanism of the grill heating chamber 9 so as to be movable in the front-rear direction.
Further, a window plate made of heat-resistant glass is installed in the central opening 13A of the door 13 so that the inside of the grill heating chamber 9 can be visually recognized from the outside. The door 13 can be opened and closed by a handle 13B protruding forward.

As shown in FIG. 2, 24 </ b> R is a right upper and lower partition plate installed vertically, and serves as a partition wall that separates the right cooling chamber 8 </ b> R and the grill heating chamber 9 inside the main body case 2. ing. Reference numeral 24L denotes a left upper and lower partition plate, which serves as a partition wall separating the left cooling chamber 8L and the grill heating chamber 9 from each other. Note that the upper and lower partition plates 24R and 24L are installed with a distance of several millimeters from the outer wall surface of the grill heating chamber 9.
24A is a notch formed in each of the left and right upper and lower partition plates 24R and 24L, and is provided so as not to collide with a cooling duct 42 to be described later when installed horizontally.

Reference numeral 25 denotes a horizontal partition plate having a size that divides the entire space between the left and right upper and lower partition plates 24L and 24R into two upper and lower spaces, and the upper part chamber 10 is above the horizontal partition plate 25. Further, the horizontal partition plate 25 is installed with a predetermined gap 26 of about several millimeters to 1 cm from the ceiling surface of the grill heating chamber 9.
Reference numeral 28 denotes a rear partition plate that partitions the upper part chamber 10 and the exhaust chamber 12. The lower end portion has a horizontal partition plate 25 and the upper end portion has a height dimension with respect to the upper frame 20. 28 </ b> A is an exhaust hole formed in two places on the rear partition plate 28 for exhausting the cooling air that has entered the upper part chamber 10.

As shown in FIG. 6, reference numeral 58 denotes a power supply board that is located at the right rear of the upper part chamber 10 and partially protrudes above the right cooling chamber 8 </ b> R. A commercial power supply of 100 V or 200 V is drawn from the lower part of the rear surface of No. 2. On the power supply board 58, for example, various electric component groups for a bridge circuit for rectifying a commercial power supply are mounted.
In addition, a power supply board (not shown) having a part protruding above the left cooling chamber 8L is also installed in the left rear corner of the upper component chamber 10. In addition, power is supplied to the heaters 22 and 23 of the grill heating chamber 9, and various electric components and the like for heating capacity (thermal power) control supplied with power from the power supply substrate 58 are mounted.
These two power supply boards are attached to the horizontal partition plate 25 with fixing means such as screws so as to maintain a certain gap from the upper surface of the horizontal partition plate 25. The gap is for facilitating passage of cooling air from a substrate cooling unit CU described later.

As shown in FIG. 3, a substrate cooling unit CU is installed in each of the right cooling chamber 8R and the left cooling chamber 8L. The substrate cooling unit CU shown in FIGS. 4 and 5 is installed in the right cooling chamber 8R. The substrate cooling unit CU installed in the left cooling chamber 8L is configured symmetrically with the substrate cooling unit CU installed in the right cooling chamber 8R.
Here, the substrate cooling unit CU installed in the right cooling chamber 8R will be described.
The substrate cooling unit CU includes an air path unit 30 that blows out air sucked from the air inlet 32 as cooling air from the air outlet 33, and a substrate storage case 31 that contains a circuit board 41 that is cooled by the cooling air of the air path unit 30. It consists of

The air passage unit 30 has a half air inlet 34a, a cylindrical air passage cover 34 having a circular opening 34b on one side, a half air inlet 35a on one side, and a half air outlet 35b on the other side. And an annular fan fixing part 35 for closing the circular opening 34b of the air passage cover 32.
The cylindrical air passage cover 34 is directed toward the communication port 34c so as to narrow the communication port 34c that connects the lower part of the half suction port 34a and the inside from the inner wall located below the half suction port 34a. An elongated storage portion forming rib 34d is provided, and a pocket-shaped dust / water storage portion 36 is formed below the half suction port 34a.
The leading end side of the storage portion forming rib 34d is directed toward the inside of the air passage unit 30 so that air entered from the suction port 32 of the air passage unit 30 smoothly enters the inside through the communication port 34c. It is curved in the same way as 34 circular inner walls.

The annular blower fixing part 35 has a motor housing cylinder 35b supported by three stays 35a at the center, and a motor 37 is housed in the motor housing cylinder 35b. A fan 38 is attached. In this manner, the motor 37 and the fan 38 constitute the blower 39.
Then, the circular opening 34b of the air passage cover 34 is integrally combined so as to be closed by a disk-shaped fan fixing part 35 provided with a fan 39, and combined with a fixing tool such as a screw to form an integrated structure. By being formed, a blower chamber having a blower 39 is formed inside the air passage cover 34, and the suction port 32 is formed by the half suction port 34 a and the half suction port 35 a, and the inside from the suction port 32. A pocket-like moisture and dust storage portion 36 is formed on the suction port 32 side below the communication port 34c that communicates with the suction port 32c.

The substrate storage case 31 is formed as an integral structure by combining two plastic half-box-like cases 31A and 31B and connecting them with a fixing tool such as a screw.
Of the two plastic cases 31A and 31B, one case 31A is provided with a fan cover portion 31Aa and a half blowout port 31Ab that cover the fan 38 of the annular blower fixing part 35.
When the case 31A is assembled to the annular fan fixing part 35 so as to cover the fan 38, the fan cover portion 31Aa of the case 31A covers the fan 38 of the annular fan fixing part 35, and the annular fan fixing part. An air outlet 34 is formed by the half air outlet 35b of 35 and the half air outlet 31Ab of the case 31A.

A circuit board 41 on which an inverter circuit for supplying a predetermined high-frequency power to the IH coil 6 is mounted is incorporated in a circuit board housing case 31 in which two plastic cases 31A and 31B are combined.
The circuit board 41 is also mounted with a power supply / drive circuit that drives the motor 37 of the blower 39 apart from the inverter circuit portion.
The blower 39 of each air path unit 30 of each board cooling unit CU installed in each of the right cooling chamber 8R and the left cooling chamber 8L cools the circuit boards for the left and right IH coils 6LC and 6RC and the coils themselves. It has become. The blower 39 is a so-called horizontal shaft type in which the rotation shaft 37a of the motor 37 is horizontal.
The air inlet 32 of the air path unit 30 communicates with the right vent 20A and the left vent 20B that are the inlets.

As shown in FIG. 3, the entire substrate storage case 31 has a horizontally long rectangular shape, and is integrated with the air path unit 30 so that the cooling air discharged from the air outlet 33 of the air path unit 30 is introduced. It is configured. And the whole part except the introduction part (not shown) connected to the blower outlet 33, and the 3rd part of the 1st exhaust port 31D and the 2nd exhaust port 31E which are mentioned later is sealed.
On the upper surface of the substrate storage case 31, two first exhaust ports 31 </ b> D and a second exhaust port 31 </ b> E are formed apart along the direction in which the cooling air from the blower 39 flows.
The second exhaust port 31E is located on the most downstream side of the cooling air flow in the substrate storage case 31, and has a larger opening area (opening area several times larger) than the first exhaust port 31D. Yes.
In FIG. 6, Y1 to Y5 indicate the flow of air sucked by the blower 39 and the flow of discharged air, and the cooling air flows sequentially with Y1, Y2,... Y5.
The substrate storage case 31 and the air path unit 30 constitute a so-called substrate cooling unit CU, and the substrate cooling unit CU is fixed to the cooling chambers 8R and 8L.

Further, as shown in FIG. 6, a cooling duct 42 is arranged between each substrate storage case 31 and each IH coil 6RC, 6LC located above each substrate storage case 31.
The cooling duct 42 is formed by, for example, overlapping an upper case 42A, which is an integrally molded product of plastic, and a lower case 42B, which is also an integrally molded product containing plastic, and fixing them with screws. Three ventilation spaces 42F, 42G, and 42H described later are formed. One side edge of the cooling duct 42 on the side of the substrate storage case 31 is square, and the remaining outer periphery is circular.
42CA is plural (for example, seven) on the rear part of the upper surface of the upper case 42A, and plural (for example, three: this is in FIG. 3) on the back side of the upper surface of the upper case 42A constituting the peripheral wall surface of the ventilation space 42F. It is the 1st ejection hole formed in the position which cannot be seen.
The first ejection holes 42CA are formed to supply cooling air from the blower 39 mainly directly behind and obliquely behind the cooling duct 42, that is, in the direction of the power supply board 58 and the central heating source 7. Note that the diameter of each of the ejection holes 42CA is the same, for example, a perfect circle having a diameter of 8 mm.

42CB is the 2nd ejection hole formed so that many may penetrate the wall surface over the whole upper surface of 42 A of upper cases. The second ejection hole 42CB is formed to supply cooling air from the blower 39 mainly upward, that is, in the direction of the IH coils 6RC and 6LC. In addition, the diameter of each ejection hole 42CB is made the same, for example, is a perfect circle with a diameter of 10 mm.
42D is a rib-shaped partition wall integrally formed in the upper case 42A and formed on a straight line or a curve, and thereby, a ventilation space 42F communicating with the first exhaust port 31D of the substrate storage case 31 is partitioned and formed. .
Similarly, 42E is a U-shaped partition wall integrally formed in the upper case 42A, and thereby a ventilation space 42H communicating with the second exhaust port 31E of the substrate storage case 31 is partitioned and formed. . The ventilation space 42H communicates with the widest ventilation space 42G through a communication port 42J formed on one side of the partition wall (see FIG. 6).

Furthermore, the cooling duct 42 is installed in the ventilation space 42 </ b> H so as to be directly above the second exhaust port 31 </ b> E of the substrate storage case 31.
Thereby, the cooling air discharged from the substrate storage case 31 enters the ventilation space 42H of the cooling duct 42, expands from here to the ventilation section 42G, and is ejected from the second ejection hole 42CB. Reference numeral 42K denotes a rectangular ventilation opening formed corresponding to the ventilation space 42H of the upper case 42A, which emits air for cooling liquid crystal display devices 45R and 45L described later.

A part (for example, two) of the three first ejection holes 42CA formed on the back side of the upper case 42A is opposed to the power supply board 58 or the power supply board 59, and the remaining part (for example, one) is It is formed so as to face the right side or the left side of the central heating source 7, and fresh cooling air sent from the first exhaust port 31D of the substrate cooling unit CU to the ventilation space 42F is supplied to the left and right power supply boards 58, 59. And to the side of the central heating source 7.
Thereafter, the cooling air that has cooled the central heating source 7 enters the exhaust chamber 12 through the exhaust hole 28A of the rear partition plate 28, and is discharged to the outside through the central ventilation port 20c of the top plate 21.

The operation means of the cooking device according to the first embodiment includes a front operation unit 60.
Plastic front operation panels 62 </ b> R and 62 </ b> L are attached to the entire left and right sides of the main body case 2, and these operation panels serve as the front operation unit 60.
The front operation unit 60 includes an operation button 63 of a main power switch that can turn on / off all power sources of the left and right IH coils 6, the central heating source 7 and the sheathed heaters 22 and 23, and a right IH coil 6. And a left operation dial 64L for controlling the energization of the left IH coil 6 and its energization amount (thermal power).

As shown in FIG. 3, reference numeral 46 denotes a front part case in which various electric / electronic parts and a light emitting element 57 or the like for displaying the heating power during induction cooking by light are fixed and accommodated on a substrate 56. The lower duct 46A is made of an open transparent plastic, and the upper duct 46B is made of a transparent plastic that serves as a lid for sealing the upper face opening of the lower duct 46A.
Ventilation holes 46R and 46L are opened at the right end and the left end of the lower duct 46A, respectively, and a notch 46C that allows ventilation is formed at the rear of the center.

On the ceiling surface of the upper duct 46B, an integrated display device 101 is installed in the center, and liquid crystal display devices 45R and 45L are installed on the left and right sides, respectively.
The cooling air from the blower 39 enters the ventilation space 42H of the cooling duct 42 from the second exhaust port 31E of the substrate storage case 31, and from there through the ventilation holes 42K formed corresponding to the ventilation space 42H, the liquid crystal display devices 45R and 45L. Is entered from the lower part of the front part case 46 and discharged into the upper part chamber 10 from the notch 46C.

Thereby, both the liquid crystal display devices 45R and 45L and the integrated liquid crystal display device 101 are always cooled by the cooling air from the blower 39. In particular, since the cooling air from the second exhaust port 31E of the substrate storage case 31 is not the air that has cooled the left and right IH coils 6LC and 6RC that become high during induction heating operation, the temperature is low, and the liquid crystal display device 45R, Along with 45L and the integrated display device 101, the temperature rise is effectively suppressed while the amount of cooling air is small.
The arrow Y5 in FIG. 6 is the flow of cooling air, and the rear positions of the left and right IH coils 6LC, 6RC are difficult to cool down. In this embodiment, the first exhaust port 31D is connected to the ventilation space 42F. A low temperature wind is directly supplied to cool the part.

In the first embodiment, when the blower 39 of the air path unit 30 is driven in a normal operating environment, the external air passes through the communication port 34c that communicates from the suction port 32 of the air path unit 30 to the inside. It is sucked into the air path unit 30.
The sucked air is discharged from the air outlet 33 forward in the horizontal direction by the fan 38 rotating at high speed inside the air path unit 30.
There is a substrate storage case 31 integrally connected to the air path unit 30 at a position in front of the air outlet 33, and the air introduction port communicates with the air outlet 33 of the air path unit 30. Inside, air is sent from the blower 39 so as to increase its internal pressure (static pressure). A part of the sent cooling air is discharged from the first exhaust port 31 </ b> D provided on the upper surface portion of the substrate storage case 31 on the side close to the air outlet 33.

The temperature of the air discharged from the first exhaust port 31D is almost the same as the temperature immediately after exiting from the air outlet 33 because it does not cool a high-temperature heating element or heat-generating electrical part on the way, and is fresh. The air remains fresh. The cooling air sent from the first exhaust port 31D to the ventilation space 42F of the cooling duct 42 is ejected upward from the first ejection hole 42CA as indicated by an arrow Y3 in FIG. It collides with the lower surface of the coil 6RC and effectively cools the coil.
When the shape of the right IH coil 6RC has a gap that allows air cooling air to partially penetrate, the cooling air from the first exhaust port 31D enters the gap and penetrates the gap. To cool upward.

In addition, fresh (at a low temperature equivalent to room temperature) cooling air is simultaneously supplied from seven first jet holes 42CA formed on the rear upper surface of the upper case 42A and three on the rear side that constitute the ventilation space 42F. Since it blows out back and flows toward the side of the power supply board 58 and the central heating source 7, those ambient temperatures can be lowered. Since there is a gap between the power supply board 58 and the horizontal partition plate 25, the temperature rise of the power supply board 58 is suppressed from both the upper surface and the lower surface.
The reason why the cooling air jetted from the first jet holes 42CA is made to flow toward the side of the central heating source 7 is to cool the central heating source 7.
The cooling air that has cooled the central heating source 7 enters the exhaust chamber 12 through the exhaust hole 28A of the rear partition plate 28, and is discharged to the outside from the central ventilation port 20B of the top plate 21.
On the other hand, the cooling air sent from the blower 39 into the board storage case 31 is not directed to the surface of the circuit board 41 and does not flow near the surface of the circuit board 41. That is, the cooling air is configured so as to pass between a large number of heat exchange fin elements centering on the portion of the heat radiating fin that is a structure projecting on the surface (one side surface) of the circuit board 41, and the heat radiating fin is the main. To be cooled.

Further, the main flow having the fastest speed among the cooling air pushed into the substrate storage case 31 from the air outlet 33 flows straight from the air outlet 33 to the front as shown by an arrow Y4 in FIG. In the storage case 31, it is ejected from the 2nd exhaust port 31E in the most downstream position of the flow of cooling air. Since the second exhaust port 31E has an opening area several times larger than that of the first exhaust port 31D, most of the cooling air pushed into the substrate storage case 31 from the air outlet 33 is the second exhaust gas. It ejects from the mouth 31E.
The blown cooling air is guided into the spaces 42G and 42H of the cooling duct 42, and most of the cooling air is blown out from the blow holes 42CA and 42CB formed on the upper surface of the upper case 42A. It collides with the lower surface of a certain right IH coil 6RC to effectively cool the coil.

  As shown in FIG. 6, a part of the cooling air guided into the space 42 </ b> H of the cooling duct 42 accommodates various electric / electronic components and a light emitting element 57 that displays the thermal power during induction heating cooking with light. Into the front part case 46. Specifically, the cooling air of the blower 39 enters the ventilation space 42H of the cooling duct 42 from the second exhaust port 31E of the substrate storage case 31, and from here the ventilation air of the cooling duct 42 formed corresponding to the ventilation space 42H. The air passes through the opening 42K and enters the ventilation openings 46R and 46L of the lower duct 46A that is positioned so as to be in close contact with the ventilation opening 42K.

  As a result, the liquid crystal display devices 45R and 45L are first cooled from below by the cooling air that has entered the front part case 46, and then flow through the front part case 46 and finally enter the upper part chamber 10 from the notch 46C. The built-in components are cooled sequentially in the process of being discharged. As a result, the liquid crystal display devices 45R and 45L, the integrated liquid crystal display device 101, various electric / electronic components, the light emitting element 57 that displays the heating power during induction heating cooking with light, and the like are sequentially cooled with cooling air. In particular, since the cooling air guided into the front part case 46 is not the air that has cooled the left and right IH coils 6LC and 6RC that become high during the induction heating operation, the temperature is low, and the liquid crystal display devices 45R and 45L are integrated. The display device 101 and the like continue to be cooled so that the temperature rise is effectively suppressed while the amount of cooling air is small.

  As shown in FIGS. 2 and 6, the cooling air jetted from the first jet holes 42CA provided in about 10 and the second jet holes 42CB provided in a larger number is provided in the upper part chamber. 10 flows backward as indicated by arrows Y5 and Y6. The cooling air discharged from the notch 46C to the upper part chamber 10 is joined to the flow of the cooling air and flows to the rear exhaust chamber 12 communicating with the outside of the main body A, so that the exhaust chamber is finally obtained. 12 is discharged.

  In the first embodiment, since the pocket-shaped dust / water storage part 36 is provided below the communication port 34c communicating with the inside from the suction port 32 of the air passage unit 30 and below the suction port 32, Through the cover 130 having numerous communication holes covering the right ventilation port 20A and the left ventilation port 20C communicating with the port 32, dust or moisture enters the intake port 32, or the cover 130 is removed from the intake port 32 for cleaning. If the dust or water is accidentally dropped into the air intake 32 when the air is removed from the air, the dust or water contained in the air intake 32 is stored in the dust / water storage unit 36, so that it is normal. When the air blower 39 in the air path unit 30 is driven under the operating environment, the air inside the air path unit 30 passes through the communication port 34c through which external air communicates from the suction port 32 of the air path unit 30 to the inside. Even if the sucked and sucked air enters the circuit board storage case 31 that stores the circuit board 41 from the air outlet 33 by the blower 39 in the air path unit 30, dust, moisture, and the like that have entered the air inlet 32 are It no longer adheres to the circuit board 41 in the board storage case 31 and leads to failure of the circuit board 41. Further, the water accumulated in the dust / water storage unit 36 evaporates over time.

  If a drainage hole (not shown) is provided in the dust / moisture storage portion 36 and a drain is provided below the drainage hole, the moisture out of the dust and moisture entering the intake port 32 is drained. Since the water accumulates in the drain through the hole, moisture does not enter the substrate storage case 31 that stores the circuit substrate 41 when the blower 39 in the air path unit 30 is driven in a normal operating environment.

Embodiment 2. FIG.
FIG. 7 is a block diagram of a notifying circuit for notifying a state in which dust, moisture or the like has accumulated in the substrate cooling unit of the electromagnetic induction heating cooker according to Embodiment 2 of the present invention.
In the second embodiment, a water detection sensor 110 that is conductive and outputs a water detection signal when it comes into contact with water is provided above the dust / water storage unit 36.
As shown in FIG. 7, the water detection sensor 110 is connected to a control unit 111, and a display unit 112 that lights, for example, a lamp for notifying the control unit 111 that water has accumulated in the dust / water storage unit 36. In addition, a voice notification unit 113 that notifies that the water has accumulated in the dust / water storage unit 36 is connected.

  In the second embodiment, when dust or moisture enters the air inlet 32 through the cover 130 or when the cover 130 is removed from the air inlet 32 for cleaning, the dust or water is accidentally removed from the air inlet 32. If the water drops into the dust / water storage unit 36, the dust / water storage unit 36 stores dust, moisture, etc., and the water accumulates in the dust / water storage unit 36 and reaches a predetermined water level. A water detection signal from the detection sensor 110 is sent to the control unit 111, and the control unit 111 drives the display unit 112 to turn on the lamp and also drives the voice notification unit 113 to collect moisture in the dust / water storage unit 36. Therefore, the user can be notified of the cleaning time of the dust / water storage unit 36.

  2 Body case, 6RC, 6LC Induction heating source (IH coil), 7 Central heating source, 8R, 8L Cooling chamber, 9 Grill heating chamber, 12 Exhaust chamber, 20 Frame body, 20A Right vent, 20B Central vent 20C Left vent, 21 Top plate, 24L, 24R Vertical partition plate, 25 Horizontal partition plate, 28 Rear partition plate, 28A Exhaust hole, 30 Air passage unit, 31 Substrate storage case, 31A Half case, 31B Half case , 31D First exhaust port, 31E Second exhaust port, 32 Suction port, 33 Air outlet, 34 Air passage cover, 34c communication port, 34d Storage portion forming rib, 35 Blower fixing part, 35d Motor storage tube, 36 Dust / moisture storage unit, 37 motor, 38 fan, 39 blower, 41 circuit board, 42 cooling duct, 42CA first jet outlet, 4 CB second spout 58 power supply board, 130 a cover, CU substrate cooling unit.

Claims (5)

A main body case in which a grill heating chamber is formed;
A top plate provided on the upper surface of the main body case;
A partition plate that vertically divides the inside of the main body case at the upper surface position of the grill heating chamber;
A cooling chamber defined in at least one of the right side and the left side of the grill heating chamber in the main body case, extending in the front-rear direction, and provided separately from the grill heating chamber;
In the main body case, comprising at least one induction heating type heat source in front disposed in the space above the partition plate,
The cooling chamber is provided with an air blower inside and has an air passage unit having an outside air inlet and an air outlet, and cooling air discharged from the air passage unit is introduced, and the induction heating type heat source a substrate storage case housing a circuit board inverter circuit is mounted is installed,
In below communication port that communicates to the inside from the suction opening of the air passage unit, dust and water containing portion of the shaped pockets formed on the intake plug mouth side,
The dust / moisture storage part is formed by providing storage part forming ribs extending toward the communication port so as to narrow the communication port from an inner wall located below the suction port in the air passage unit. An electromagnetic induction heating cooker characterized by that. Electromagnetic induction heating cooker of claim 1, wherein the curved toward the inside of the air passage unit leading end side of the housing portion forming the rib. A water detection sensor provided at an upper position of the dust / moisture storage unit, which conducts electricity when in contact with water and outputs a water detection signal;
An informing means for informing that water has accumulated in the dust / water storage unit;
Electromagnetic induction heating cooker according to claim 1 or claim 2, wherein further comprising a controller to perform notification by driving the informing means receiving the water detection signal of the water detecting sensor. 4. The electromagnetic induction heating cooker according to claim 3, wherein the notification means is a display unit and / or a voice notification unit.   The electromagnetic induction heating cooker according to claim 1, wherein the dust / water storage portion has a drain hole.

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