JP2012009163A - Induction heating cooker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an induction heating cooker which increases cooling efficiency of induction heating coils and a coil base for a heating chamber.SOLUTION: The induction heating cooker comprises; a heating chamber 9 in which a heating target 18 is cooked; heaters 13a and 13b disposed in the heating chamber 9 for heating the heating target 18; induction heating coils 14 disposed on the backside of a back plate 10 forming a back face of the heating chamber 9 for inductively heating the heaters 13a and 13b, respectively; heating chamber coil bases 15 for respectively holding the induction heating coils 14; a magnetic substance 16 disposed on the backside of the heating chamber coil bases 15 for enforcing magnetic flux generated by the induction heating coils 14 in directions interlinking the heaters 13a and 13b, respectively; and cooling fans 20 for respectively cooling the induction heating coils 14 and the heating chamber coil bases 15 by a cool wind blowing in between the back plate 10 of the heating chamber 9 and the heating chamber coil bases 15.

Description

  The present invention relates to an induction heating cooker, and more particularly to an improvement in cooling performance of an induction heating cooker.

  2. Description of the Related Art Conventionally, induction heating cookers are known in which an eddy current is induced by a high-frequency magnetic flux generated by flowing a high-frequency current through an induction heating coil, and an object to be heated is heated by Joule heat generated thereby. In order to maintain the performance of such an induction heating cooker, it is necessary to efficiently cool the induction heating coil.

  Therefore, various induction heating cookers have been proposed in which the induction heating coil is efficiently cooled. As such, an induction heating coil that heats an object to be heated, a coil base on which the induction heating coil is placed, and a plurality of coils disposed below the coil base and discharged toward the lower side of the induction heating coil There has been proposed an induction heating cooker provided with a duct having a discharge hole formed on the upper surface (see, for example, Patent Document 1).

  In the induction heating cooker described in Patent Document 1, a fan that blows cooling air and a duct that guides the cooling air of the fan to the coil base and the induction heating coil are provided below the coil base and the induction heating coil. Yes. The duct is composed of an upper duct and a lower duct, and an air passage is formed between the upper duct and the lower duct. The area of the cross section of the air passage is formed so as to gradually decrease in the traveling direction of the cooling air. Therefore, the cooling air is uniformly discharged from the plurality of discharge holes formed in the duct. The duct is formed in an annular shape so as to face the lower surface of the coil base. With the above configuration, the induction heating cooker described in Patent Document 1 cools the coil and the coil base.

Japanese Patent Laying-Open No. 2008-166054 (FIG. 3)

  The induction heating cooker described in Patent Document 1 is a type in which a container to be cooked is placed on a glass top provided on an induction heating coil and induction heated. Further, in such a conventional induction heating cooker, a heating chamber for heating an object to be heated (for example, fish) is provided, and a power source is electrically connected to both ends of the heater provided in the heating chamber. There is a type that heats the inside of the heating chamber by causing the heater to generate heat (for example, a sheathed heater) by flowing an electric current by connecting to the heater.

  Here, when heating the inside of the heating chamber, when adopting a technology for separately providing a heating chamber induction heating coil different from the induction heating coil and induction heating the heater in the heating chamber, this heating chamber induction It is necessary to cool the heating coil and the adjacent coil base. However, the induction heating coil for the heating chamber and a part of the coil base are covered with a magnetic material in order to increase the generated magnetic flux, and the induction heating coil as described in Patent Document 1 is in a plane view. Highly efficient cooling cannot be realized by the cooling means that applies cooling air to the vertical direction.

  The present invention has been made to solve the above-described problems, and aims to improve the cooling efficiency of the induction heating coil for the heating cabinet and the coil base.

  An induction heating cooker according to the present invention includes a heating chamber in which an object to be heated is cooked, a heater provided inside the heating chamber for heating the object to be heated, and a back surface of a back plate constituting the back surface of the heating chamber. The induction heating coil that is provided on the side and induction heating coil that heats the heater, the coil base that holds the induction heating coil, and the back side of the coil base that strongly generates magnetic flux generated from the induction heating coil in the direction linked to the heater. And a cooling fan that cools the induction heating coil and the coil base by supplying cooling air between the back plate of the heating chamber and the coil base.

  According to the induction heating cooker according to the present invention, since cooling air is supplied between the back plate of the heating chamber and the coil base, the cooling efficiency of the induction heating coil for the heating chamber and the coil base is improved.

It is a disassembled perspective view of the induction heating cooking appliance which concerns on Embodiment 1 of this invention. It is sectional drawing of the heating chamber of the induction heating cooking appliance shown in FIG. FIG. 2 is an enlarged part of a cross-sectional view of a heating chamber of the induction heating cooker shown in FIG. It is a back surface perspective view of the heating chamber of the induction heating cooking appliance shown in FIG. It is sectional drawing of the heating chamber of the induction heating cooking appliance which concerns on Embodiment 2 of this invention. It is a back surface perspective view of the heating chamber of the induction heating cooking appliance which concerns on Embodiment 3 of this invention. It is sectional drawing in the opening part of the induction heating cooking appliance shown in FIG. It expands a part of cross section of the heating chamber of the induction heating cooking appliance which concerns on Embodiment 4 of this invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
Embodiment 1 FIG.
FIG. 1 is a perspective view of induction heating cooker 100 according to Embodiment 1 of the present invention. FIG. 2 is a cross-sectional view of the heating chamber of the induction heating cooker 100 shown in FIG. FIG. 3 is an enlarged view of a part of the sectional view of the heating chamber of the induction heating cooker 100 shown in FIG. 4 is a rear perspective view of the heating chamber of the induction heating cooker 100 shown in FIG. The induction heating cooker 100 is demonstrated based on FIGS. In addition, in the following drawings including FIG. 1, the relationship of the size of each component may be different from the actual one.

The induction heating cooker 100 according to the present invention uses an induction heating coil 3 (described later) to induction-heat a heated cooking container 2 placed on a glass top 1a (described later) or a radiant heater 6 ( It will be possible to cook by cooking in a later step). Furthermore, the induction heating cooker 100 has a grill function for directly cooking the article 18 to be heated by radiant heat of a heater provided in a heating chamber 9 described later, and a heating chamber that maintains the heater temperature at a predetermined temperature. 9 has an oven function of heating the air in 9 and cooking the object to be heated 18 with the heated air.
The induction heating cooker 100 has at least a glass top 1a and a main body case 1b.

  The glass top 1a is a top plate disposed on the upper surface side of the main body case 1b, is made of heat-resistant glass or the like, and places the cooking container 2 to be heated such as a pan. In the induction heating cooker 100, three pan mounting portions 1c are formed on the upper surface side of the glass top 1a, and the induction heating coil 3 and the radiant heater 6 (described later) provided in the main body case 1b are used. The corresponding position is shown, and is a guideline for placing the cooked cooking container 2.

  As shown in FIG. 1, at least a induction heating coil 3, a coil base 4, a drive circuit board 5, a radiant heater 6, a fan 7, a duct 8, and a heating chamber 9 are provided in the main body case 1 b.

  In the induction heating coil 3, eddy current is generated in the cooked cooking container 2 placed above the induction heating coil 3 due to the lines of magnetic force generated by the current, and the cooked cooking container 2 itself generates heat.

  The induction heating coil 3 described above is placed on the coil base 4. The coil base 4 is provided with ferrite or the like for preventing the magnetic lines of force generated from the induction heating coil 3 from flowing downward and concentrating the magnetic lines of force on the cooking container 2 to be heated. Further, the coil base 4 is supported from below by a support member (not shown) and is pressed so as to be in close contact with the top plate. In addition, this support member should just be what can support the coil bases 4, such as a spring, and does not specifically limit a kind and number.

  When receiving an instruction from the user via the operation panel (not shown), the drive circuit board 5 controls the induction heating coil 3 and the like based on the contents of the instruction. The drive circuit board 5 controls the temperature of the induction heating coil 3 and the like based on the temperature detected by a temperature sensor (not shown).

  The radiant heater 6 is supplied with AC power of a normal commercial frequency, and the radiant heater 6 itself generates heat, whereby the cooked container 2 is heated with its radiant heat.

  The fan 7 blows air that cools the induction heating coil 3 and the coil base 4. The configuration of the fan 7 is not particularly limited. For example, a sirocco fan (blower fan) that is one of centrifugal fans may be employed.

  The duct 8 is arranged on the lower side of the coil base 4 and can guide the air from the fan 7 toward the induction heating coil 3.

  The heating chamber 9 can install an object to be heated 18 (for example, fish) when grilling or ovening. The heating chamber 9 is provided below the main body case 1b. Hereinafter, the heating chamber 9 will be described in detail.

  As shown in FIGS. 1 and 2, the heating chamber 9 includes at least a front surface portion 9 a, a bottom surface portion 9 d, and a back plate 10. The heating chamber 9 is provided with at least a tray 11, a grill 12, an upper heater 13a, and a lower heater 13b. In addition, an induction heating coil 14 for heating chamber, a coil base 15 for heating chamber, and a magnetic body 16 are provided on the back side of the back plate 10 of the heating chamber 9.

  The front surface portion 9 a is attached to the front surface when the heating chamber 9 is viewed from the front, and constitutes a part of the heating chamber 9. Although the shape of the front surface part 9a is not specifically limited, For example, the rectangular board material with arbitrary thickness may be sufficient. A door 17 is attached to the front surface portion 9a. The door 17 is a member that covers the front surface of the heating chamber 9.

  The door 17 is provided with a handle 17a protruding forward. When the user grasps the handle 17a and moves the door 17 in the front-rear direction, a pair of left and right metal rails (not shown) connected to the door 17, a tray 11 and a grill 12 described later are interlocked and moved in the front-rear direction. It is possible to open and close the heating chamber 9. In addition, this metal rail should just be movable back and forth along the rail receiving part (not shown) formed in the both sides | surfaces in the heating chamber 9. FIG.

  The bottom surface portion 9d is attached to the bottom surface when the heating chamber 9 is viewed from the front, and constitutes a part of the heating chamber 9. The shape of the bottom surface portion 9d is not particularly limited, but may be a rectangular plate having an arbitrary thickness, for example.

  2 and 3, when the heating chamber 9 is viewed from the front, the back plate 10 has an upper recess 10a and a lower recess 10b that are recessed from the front side to the back side. It is formed and constitutes a part of the heating chamber 9. As shown in FIG. 2, an upper heater 13a and a lower heater 13b, which will be described later, are attached to the upper recess 10a and the lower recess 10b, respectively, substantially parallel to the surface on which the induction heating cooker 100 is placed. The back plate 10 is made of a nonmagnetic material ceramic or the like. In addition, although the shape of the recessed part of a backplate is not limited to a substantially rectangular parallelepiped shape as shown in FIG.2 and FIG.3, in the following description, it demonstrates as what has a substantially rectangular parallelepiped shape.

  The saucer 11 has a substantially rectangular parallelepiped shape without an upper surface, and can store, for example, water or oil therein. Usually, the saucer 11 is detachably supported on both left and right ends on the metal rail. Therefore, the tray 11 can be removed independently from above the metal rail.

  The grill 12 is placed on the tray 11. As shown in FIG. 2, the cross section of the grill 12 has a C shape. The grill 12 is composed of at least a grill upper surface 12a and a grill lower surface 12b, and a lower heater 13b, which will be described later, is installed between them. An object to be heated 18 can be placed on the grill top surface 12a. Further, the grill net lower surface 12 b comes into contact with the tray 11, whereby the grill net 12 is held on the tray 11.

  The upper heater 13a and the lower heater 13b are respectively attached to the front surfaces of the upper recess 10a and the lower recess 10b, and are substantially parallel to the bottom surface 9d (or the surface on which the induction heating cooker 100 is placed). Is provided. In addition, although the shape of the upper heater 13a and the lower heater 13b is not specifically limited, it is good in the shape which spreads in the surface substantially parallel to the bottom face part 9d. Further, the upper heater 13a and the lower heater 13b may be made of a metal having a large volume resistivity or resistivity.

  The induction heating coil 14 for a heating cabinet is a metal wire wound in an annular shape for induction heating the upper heater 13a and the lower heater 13b. The induction heating coil 14 for a heating chamber is provided on the back side of the upper recess 10a and the lower recess 10b, and is held by a heating chamber coil base 15 described later. Furthermore, in order to make the description of the induction heating coil 14 for heating chambers detailed, the induction heating coil 14 for heating chambers is divided into an upper linear portion 14a, a lower linear portion 14b, a right curved portion 14c and a left curved portion as follows. The definition is divided into 14d.

  As shown in FIG. 4, the upper straight portion 14 a and the lower straight portion 14 b are a part of the induction heating coil 14 for a heating chamber that is installed at a position facing the back side of the upper recess 10 a and the lower recess 10 b, respectively. The right curved portion 14c and the left curved portion 14d are arc-shaped portions connecting the right end of the upper straight portion 14a and the right end of the lower straight portion 14b, respectively, and the arc shape connecting the left end of the upper straight portion 14a and the left end of the lower straight portion 14b. It corresponds to the part.

  In addition, in induction heating cooking appliance 100, either side of induction heating coil 14 for heating cabinets and coil base 15 for heating cabinets mentioned below are in contact, and, thereby, induction heating coil 14 for heating cabinets is held. It shall be.

  The coil base 15 for the heating chamber has a shape corresponding to the recesses (the upper recess 10a and the lower recess 10b) formed in the back plate 10. As an example of such a shape, the shape of the coil base 15 for a heating chamber will be described below. As shown in FIGS. 2 and 3, the heating chamber coil base 15 is provided so as to cover the upper recess 10 a, the lower recess 10 b, and the heating chamber induction heating coil 14. Further, the heating chamber coil base 15 is formed so that an air layer 22 (shaded portion in FIGS. 2 and 3) is formed between the surface of the induction heating coil 14 for heating chamber 14 and the back plate 10. It is configured. In order to describe the heating chamber coil base 15 in detail, the coil-shaped surface portion 15a, the first upper surface portion 15b, the first lower surface portion 15c, the second upper surface portion 15d, and the second lower surface portion 15e are as follows: Define them separately.

  As shown in FIG. 4, the coil-shaped surface portion 15 a is installed in a position facing the back side of a surface (substantially donut-shaped surface) when the induction heating coil 14 for heating chamber is viewed in plan view. It is a part of. The 1st upper surface part 15b and the 1st lower surface part 15c are a part of the coil base 15 for heating chambers located in the back upper direction and the back lower direction of the upper recessed part 10a, respectively. The first upper surface portion 15b and the first lower surface portion 15c have a substantially rectangular shape when viewed in plan.

  Further, the second upper surface portion 15d and the second lower surface portion 15e are a part of the coil base 15 for the heating chamber located in the lower back direction and the upper back direction of the lower recess 10b, respectively. The second upper surface portion 15d and the second lower surface portion 15e have a substantially rectangular shape when viewed in plan. In addition, the 1st upper surface part 15b, the 1st lower surface part 15c, the 2nd upper surface part 15d, and the 2nd lower surface part 15e are substantially parallel to the surface in which the induction heating cooking appliance 100 is mounted. In addition, the coil base 15 for heating chambers is good to comprise from material (for example, PET) with high heat resistance. The heating chamber coil base 15 is held by fixing the first upper surface portion 15 b and the second lower surface portion 15 e to the back plate 10 with the fixing bracket 19.

  As described above, the coil base 15 for the heating chamber has a U-shaped cross section in a plane parallel to the side surface of the induction heating cooker 100. Therefore, as shown in FIG. 4, a space is formed between the back plate 10 and the heating coil base 15. In this space, the surface on the side of the cooling fan 20 described later is defined as an upper cooling air inlet 15f and a lower cooling air inlet 15g, and the opposite side is defined as an upper cooling air outlet 15h and a lower cooling air outlet 15i. To do.

  The magnetic body 16 includes a first magnetic body 16a, a second magnetic body 16b, a third magnetic body 16c, and a fourth magnetic body 16d. The first magnetic body 16a, the second magnetic body 16b, the third magnetic body 16c, and the fourth magnetic body 16d have the same shape, but are installed in different places. As shown in FIG. 3, the first magnetic body 16a, the second magnetic body 16b, the third magnetic body 16c, and the fourth magnetic body 16d are substantially U-shaped in cross section, and each of them is a coil base 15 for the heating chamber. It is shaped to cover. However, the shape of the magnetic body 16 is not particularly limited as long as the magnetic flux generated from the induction heating coil 14 for the heating chamber is strengthened in the direction interlinking with the upper heater 13a and the lower heater 13b. In induction heating cooking appliance 100 concerning form 1, it explains as what has the above-mentioned shape.

Specifically, the back side of the upper concave portion 10a, the upper straight portion 14a of the heating chamber induction heating coil 14, the coil-shaped surface portion 15a of the heating chamber coil base 15, the first upper surface portion 15b and the first lower surface portion 15c, A first magnetic body 16a and a second magnetic body 16b are provided so as to cover. Moreover, the back side of the lower recessed part 10b, the lower straight part 14b of the induction heating coil 14 for the heating chamber, the coil-shaped surface part 15a, the second upper surface part 15d and the second lower surface part 15e of the heating coil base 15 are covered. The third magnetic body 16c and the fourth magnetic body 16d are provided.
As shown in FIG. 3, for example, the magnetic body 16 may be provided so as to cover the upper heater 13a and the lower heater 13b provided in the heating chamber 9 up to the dotted line A (upper heater 13a). And the magnetic flux in the direction interlinking with the lower heater 13b is strengthened). However, it is assumed that the magnetic body 16 is provided outside the heating chamber 9.

  As shown in FIG. 4, the cooling fan 20 is provided on the right side of the heating chamber induction heating coil 14 and the heating chamber coil base 15 when the heating chamber 9 is viewed from the front. The cooling fan 20 may be provided on the left side surface of the heating chamber induction heating coil 14 and the heating chamber coil base 15, but in the induction heating cooker 100 according to the first embodiment, the right side surface. The description will be made on the assumption that it is provided on the side.

  The power supply circuit unit 21 is provided with a power supply circuit (not shown), and can generate a current having a predetermined frequency and a predetermined current value. Moreover, the power supply circuit unit 21 is connected to the heating chamber induction heating coil 14 via the supply line 18a, and supplies current to the heating chamber induction heating coil 14 from the supply line 18a.

  As shown in FIGS. 2 and 3, when the induction heating cooker 100 is viewed from the side, an air layer 22 is formed between the back plate 10 and the heating chamber induction heating coil 14. The cooling air supplied from the cooling fan 20 continuously ventilates the air layer 22 formed between the back plate 10 and the heating chamber induction heating coil 14. In other words, the air in the air layer 22 that has received and heated the heat of the heating chamber induction heating coil 14 and the heating chamber coil base 15 is successively replaced by the supplied cooling air, and the heating chamber induction heating coil 14 and the heating chamber. The coil base 15 is cooled.

  Next, cooling of the heating chamber induction heating coil 14 and the heating chamber coil base 15 will be described. First, as shown in FIG. 4, the cooling fan 20 blows cooling air from the side of the heating chamber 9, and the blown cooling air is heated from the upper cooling air intake 15f and the lower cooling air intake 15g. The space is sandwiched between the storage coil base 15 and the back plate 10.

  More specifically, one cooling air cools the upper straight portion 14a while ventilating the air layer 22 surrounded by the coil-shaped surface portion 15a, the first upper surface portion 15b, and the first lower surface portion 15c, and then It is discharged from the upper cooling air outlet 15h. The other cooling air cools the lower straight portion 14b from the lower cooling air intake port 15g while ventilating the air layer 22 surrounded by the coil-shaped surface portion 15a, the second upper surface portion 15d, and the second lower surface portion 15e. , And is discharged from the lower cooling air outlet 15i.

  Therefore, the induction heating coil 14 for the heating chamber in the portion covered with the magnetic body 16 is efficiently cooled. Furthermore, since the cooling air is prevented from diffusing by the heating chamber coil base 15, the heating chamber induction heating coil 14 is efficiently cooled. It goes without saying that the portion of the heating chamber coil base 15 covered with the magnetic body 16 is also efficiently cooled by the flow of cooling air through the air layer 22.

  Moreover, since the inside of the heating chamber 9 and the outside of the heating chamber 9 are insulated by the air layer 22, it is suppressed that the heat generated in the heating chamber 9 is transmitted to the induction heating coil 14 for the heating chamber.

Embodiment 2. FIG.
FIG. 5 is a cross-sectional view of heating chamber 9 of induction heating cooker 100 according to Embodiment 2 of the present invention. In the second embodiment, the same parts as those in the first embodiment are denoted by the same reference numerals, and differences from the first embodiment will be mainly described.

  In FIG. 5, the induction heating coil 14 for heating chamber, the upper straight portion 14a, the lower straight portion 14b, the right curved portion 14c, the left curved portion 14d, the heating coil base 15 and the coil-shaped surface portion 15a of the first embodiment. The first upper surface portion 15b, the first lower surface portion 15c, the second upper surface portion 15d, and the second lower surface portion 15e are respectively the induction heating coil 24 for the heating chamber, the upper straight portion 24a, the lower straight portion 24b of the second embodiment, The right curved portion 24c, the left curved portion 24d, the heating coil base 25, the coil-shaped surface portion 25a, the first upper surface portion 25b, the first lower surface portion 25c, the second upper surface portion 25d, and the second lower surface portion 25e correspond to each other. .

  As shown in FIG. 5, the second embodiment is different from the first embodiment in that the positional relationship between the heating chamber induction heating coil 24 and the heating chamber coil base 25 is different. Specifically, in the first embodiment, the back side of the induction heating coil 14 for the heating chamber and the coil base 15 for the heating chamber are provided in contact with each other, whereas in the second embodiment, the heating chamber is provided. An air layer 22 is also formed between the back side of the induction heating coil and the coil base 25 for the heating chamber (however, at least a part of the portion covered with the magnetic body 16 is excluded). Thus, the cooling air blown from the cooling fan 20 cools the back side of the upper straight portion 24a and the lower straight portion 24b.

  Therefore, the induction heating coil 24 for the heating chamber in the portion covered with the magnetic body 16 is efficiently cooled. Further, since the cooling air is prevented from diffusing by the heating chamber coil base 25, the heating chamber induction heating coil 24 is more efficiently cooled. Nor. Needless to say, the cooling air flows through the air layer 22 so that the portion where the coil base 25 for the heating chamber is covered with the magnetic body 16 is also efficiently cooled.

Embodiment 3 FIG.
FIG. 6 is a rear perspective view of the heating chamber of the induction heating cooker according to the third embodiment of the present invention. FIG. 7 is a cross-sectional view of the opening of the induction heating cooker shown in FIG. Based on FIG.6 and FIG.7, the induction heating cooking appliance 100 which concerns on this Embodiment 3 is demonstrated. In the third embodiment, the same parts as those in the first and second embodiments are denoted by the same reference numerals, and differences from the first and second embodiments will be mainly described.

  6 and 7, the induction heating coil 14 for the heating chamber, the upper straight portion 14a, the lower straight portion 14b, the right curved portion 14c, the left curved portion 14d, the heating coil base 15 and the coil according to the first embodiment. The shape surface portion 15a, the first upper surface portion 15b, the first lower surface portion 15c, the second upper surface portion 15d, and the second lower surface portion 15e are respectively the induction heating coil 34 for heating chamber, the upper straight portion 34a, and the lower straight portion of the third embodiment. Part 34b, right curved part 34c, left curved part 34d, coil base 35 for heating chamber, coil-shaped surface part 35a, first upper surface part 35b, first lower surface part 35c, second upper surface part 35d, and second lower surface part 35e correspond. is doing.

  In this Embodiment 3, as shown in FIG. 6, the part covered with the magnetic body 16 of the coil-shaped surface part 35a of the coil base 35 for heating chambers is opened, and the wind direction board 37 is on the opening surface. Is provided. Moreover, as shown in FIG. 7, the cooling fan 30 is provided in the back side direction of the coil base 35 for heating chambers.

  The wind direction plate 37 is provided in the back side direction of the upper straight portion 34a and the lower straight portion 34b. The shape of the wind direction plate 37 is not particularly limited, but the cooling air of the cooling fan 30 provided on the back side of the heating-coil coil base 35 is caused to flow in front of the induction heating cooker 100 by the wind direction plate 37. When viewed, it is only necessary to branch in two directions substantially parallel to the width direction (from right to left and from left to right) (for example, a triangular prism having an isosceles triangle as a bottom surface).

  The method of holding the wind direction plate 37 is not particularly limited, but in the third embodiment, the description will be made assuming that the wind direction plate 37 is attached to the first upper surface portion 35b and the second lower surface portion 35e. Note that, as shown in FIG. 6, the above opened surfaces are defined as a first opening, a second opening, a third opening, and a fourth opening, respectively.

  The cooling of the heating chamber induction heating coil 34 and the heating chamber coil base 35 will be described. First, as shown in FIG.6 and FIG.7, the cooling fan 30 ventilates cooling air from the back side direction of the heating store | warehouse | chamber 9, and the ventilated cooling air is 1st opening part, 2nd opening part, 3rd. The air enters the air layer 22 formed between the coil base 35 for the heating chamber and the back plate 10 through the opening and the fourth opening.

  The cooling air that has entered from the first opening has a traveling direction that is approximately parallel to the width direction and is smoothly directed from the left to the right when the induction heating cooker 100 is viewed from the front by the wind direction plate 37. It is like that. Accordingly, while the air layer 22 surrounded by the coil-shaped surface portion 35a covered with the first magnetic body 16a, the first upper surface portion 35b, the first lower surface portion 35c, and the back plate 10 is ventilated, the upper straight line The portion 34a is cooled and discharged from the upper cooling air intake 15f.

  The cooling air that has entered from the second opening portion has a traveling direction that is substantially parallel to the width direction and is smoothly directed from the right to the left when the induction heating cooker 100 is viewed from the front by the wind direction plate 37. It is like that. As a result, while the air layer 22 surrounded by the coil-shaped surface portion 35a covered with the second magnetic body 16b, the first upper surface portion 35b, the first lower surface portion 35c, and the back plate 10 is ventilated, the upper straight line The portion 34a is cooled and discharged from the upper cooling air outlet 15h.

  The cooling air that has entered from the third opening has a traveling direction that is substantially parallel to the width direction and is directed smoothly from the left to the right when the induction heating cooker 100 is viewed from the front by the wind direction plate 37. It is like that. As a result, while the air layer 22 surrounded by the coil-shaped surface portion 35a covered with the third magnetic body 16c, the second upper surface portion 35d, the second lower surface portion 35e, and the back plate 10 is ventilated, the lower straight line The part 34b is cooled and discharged from the lower cooling air inlet 15g.

  The cooling air that has entered through the fourth opening has a traveling direction that is approximately parallel to the width direction and smoothly moves from right to left when the induction heating cooker 100 is viewed from the front by the wind direction plate 37. It is like that. As a result, while the air layer 22 surrounded by the coil-shaped surface portion 35a covered with the fourth magnetic body 16d, the second upper surface portion 35d, the second lower surface portion 35e, and the back plate 10 is ventilated, the lower straight line The portion 34b is cooled and discharged from the upper cooling air intake 15i.

  Therefore, the induction heating coil 34 for the heating chamber in the portion covered with the magnetic body 16 is efficiently cooled. Furthermore, since the cooling air is prevented from diffusing by the heating chamber coil base 35, the heating chamber induction heating coil 34 is efficiently cooled. It goes without saying that the portion of the heating chamber coil base 35 covered with the magnetic body 16 is also efficiently cooled by the flow of cooling air through the air layer 22.

Embodiment 4 FIG.
FIG. 8: enlarges a part of cross section of the heating chamber of the induction heating cooking appliance which concerns on Embodiment 4 of this invention. In the fourth embodiment, the same parts as those in the third embodiment are denoted by the same reference numerals, and differences from the third embodiment will be mainly described.

  In FIG. 8, the induction heating coil 34 for heating chamber, the upper straight portion 34a, the lower straight portion 34b, the right bending portion 34c, the left bending portion 34d, the heating chamber coil base 35, and the coil-shaped surface portion 35a of the third embodiment. The first upper surface portion 35b, the first lower surface portion 35c, the second upper surface portion 35d, the second lower surface portion 35e, the first opening 38a, the second opening 38b, the third opening 38c, and the fourth opening 38d, Induction heating coil 44 for heating chamber, upper straight portion 44a, lower straight portion 44b, right curved portion 44c, left curved portion 44d, heating chamber coil base 45, coil-shaped surface portion 45a, and first upper surface portion, respectively, according to the fourth embodiment. 45b, the 1st lower surface part 45c, the 2nd upper surface part 45d, the 2nd lower surface part 45e, the 1st opening part 48a, the 2nd opening part 48b, the 3rd opening part 48c, and the 4th opening part 48d respond | correspond.

  In the fourth embodiment, as shown in FIG. 7, the first lower surface portion 45c and the second upper surface portion 45d are also opened. Along with this, the first opening, the second opening, the third opening, and the fourth opening become larger, so that the cooling air blown from the cooling fan 30 is spread over a wider range, and the coil base 45 for the heating chamber and the back. The air layer 22 surrounded by the face plate 10 is taken in.

  DESCRIPTION OF SYMBOLS 1a Glass top, 1b Main body case, 1c Pan mounting part, 2 Heated cooking container, 3 Induction heating coil, 4 Coil base, 5 Drive circuit board, 6 Radiant heater, 7 Fan, 8 Duct, 9 Heating chamber, 9a Front Part, 9d bottom part 10 back plate, 10a upper concave part, 10b lower concave part, 11 saucer, 12 grill, 13a upper heater, 13b lower heater, 14 induction heating coil for heating cabinet, 14a upper linear part, 14b lower linear part, 14c right bent portion, 14d left bent portion, 15 heating coil base, 15a coil shape surface portion, 15b first upper surface portion, 15c first lower surface portion, 15d second upper surface portion, 15e second lower surface portion, 16 magnetic body, 16a 1st magnetic body, 16b 2nd magnetic body, 16c 3rd magnetic body, 16d 4th magnetic body, 17 Door, 17a Handle, 18 Cover Thermal material, 19 Fixing bracket, 20 Cooling fan, 21 Power supply circuit section, 22 Air layer, 24 Heating chamber induction heating coil, 25 Heating chamber coil base, 30 Cooling fan, 34 Heating chamber induction heating coil, 34a Straight line Part, 34b Lower straight part, 35 Coil base for heating chamber, 35a Coil-shaped surface part, 35b First upper surface part, 35c First lower surface part, 35d Second upper surface part, 35e Second lower surface part, 37 Wind direction plate, 38a First Opening, 38b second opening, 38c third opening, 38d fourth opening, 44 induction heating coil for heating chamber, 44a upper straight portion, 44b lower straight portion, 45 heating chamber coil base, 45a coil shape surface portion 45b first upper surface portion, 45c first lower surface portion, 45d second upper surface portion, 45e second lower surface portion, 48a first opening portion, 48b second opening portion, 48c first 3 openings, 48d 4th opening, 100 induction heating cooker.

Claims (10)

A heating chamber in which the object to be heated is cooked;
A heater provided inside the heating chamber for heating the object to be heated;
An induction heating coil that is provided on the back side of the back plate that constitutes the back surface of the heating chamber, and induction heats the heater;
A coil base for holding the induction heating coil;
A magnetic body which is provided on the back side of the coil base and strengthens the magnetic flux generated from the induction heating coil in a direction interlinking with the heater;
An induction heating cooker comprising: a cooling fan that supplies cooling air between a back plate of the heating chamber and the coil base to cool the induction heating coil and the coil base. The induction heating cooker according to claim 1, wherein an air layer is provided between the induction heating coil and the coil base. The back plate is formed with a recess in which at least a part of the back plate is recessed from the front side toward the back side when the heating chamber is viewed from the front, and the magnetic body has the shape of the recess. The induction cooking device according to claim 1, wherein the induction heating cooker is configured as a U-shaped cross section. The induction heating cooker according to claim 3, wherein the heater is provided in the recess so that one end of the heater is covered with the magnetic body when the heating chamber is viewed from the side. The induction heating cooker according to claim 3 or 4, wherein the coil base is configured as a U-shaped cross section corresponding to the shape of the recess when the heating chamber is viewed from the front. The induction heating cooker according to any one of claims 3 to 5, wherein the cooling fan is provided on a side surface of the heating chamber. An opening is formed in a portion of the coil base that is not covered with the magnetic body,
The cooling fan supplies cooling air to an air layer formed between the concave portion of the back plate and the coil base via the opening. The induction heating cooker described in 1. The induction heating cooker according to claim 7, wherein a wind direction plate capable of changing a direction of the cooling air of the cooling fan is provided on the back side of the opening of the coil base. The induction heating cooker according to claim 7 or 8, wherein a length of at least one of an upper surface and a lower surface of the coil base is shortened. The induction heating cooker according to claim 8, wherein the cooling fan supplies cooling air toward the opening.

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