Electromagnetic cooker

Abstract

To achieve both improvement of cooling efficiency and prevention of intrusion of liquid.SOLUTION: An electromagnetic cooker 1 includes: a casing 2 having a bottom wall 13, a peripheral wall 14 erected from the bottom wall 13, and an internal space 15 defined by inner surfaces of the bottom wall 13 and the peripheral wall 14; and a plurality of slits 30 penetrating the peripheral wall 14 and arranged at intervals from each other. The plurality of slits 30 include short slits 31 and long slits 32 longer than the short slits 31 in a height direction. One or more short slits 31 and one long slit 32 constitute one set of module 30M. A plurality of sets of modules 30M are arranged on the peripheral wall 14. In each of the modules 30M, a lower end of the short slit 31 is positioned above a lower end of the long slit 32.SELECTED DRAWING: Figure 5

Description

[Technical Field]

[0001] The present invention relates to an induction cooker. [Background technology]

[0002] Patent Document 1 discloses a tabletop induction cooker with a fan inside the main body. Numerous slits are arranged on the side wall of the main body to allow the air from the fan to be discharged outside the main body. To equalize the temperature of the exhaust air from the slits, the slits are shortened in the height direction only in the area facing the fan, thereby locally increasing the exhaust resistance. On both sides of this area, the slits are uniformly long and relatively long. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2008-53071 Summary of the Invention [Problem to be solved by the invention]

[0004] It is thought that a larger opening area of ​​the slits on the side walls improves cooling efficiency. On the other hand, if a user accidentally spills a liquid such as a beverage or seasoning on the table on which the induction cooker is placed, the liquid is likely to penetrate deep into the main body through the slits.

[0005] An object of the present invention is to improve cooling efficiency while preventing the intrusion of liquid. [Means for solving the problem]

[0006] One aspect of the present invention provides an induction cooker comprising a casing having a bottom wall, a peripheral wall erected from the bottom wall, and an internal space defined by the inner surfaces of the bottom wall and the peripheral wall, and a plurality of slits penetrating the peripheral wall and arranged at intervals from one another, the plurality of slits including short slits and long slits that are longer in the vertical direction than the short slits, one or more of the short slits and one or more of the long slits being arranged alternately on the peripheral wall, and the lower ends of the short slits being located above the lower ends of the long slits.

[0007] According to the above configuration, one or more long slits and one or more short slits are arranged alternately in the peripheral wall of the casing. This allows the resistance to airflow to be reduced approximately uniformly in the direction of extension of the peripheral wall, and also allows the resistance to liquid intrusion to be increased approximately uniformly. This makes it easy to achieve both improved cooling efficiency and prevention of liquid intrusion.

[0008] One or more of the short slits and one of the long slits may be arranged alternately on the peripheral wall.

[0009] According to the above configuration, the number of long slits can be reduced while the arrangement density of the long slits can be made uniform in the direction in which the peripheral wall extends, thereby evenly preventing the intrusion of liquid.

[0010] A bank portion facing the inner surface of the peripheral wall may be erected on the bottom wall, and the internal space may include a buffer space between the bank portion and the peripheral wall, and an electrical equipment storage space on the opposite side of the peripheral wall from the bank portion.

[0011] According to the above configuration, even if liquid enters the inside of the casing through the slit, the liquid is blocked by the bank portion and prevented from entering the electrical equipment accommodating space from the buffer space.

[0012] The long slit may include an extension extending from a lower end of the peripheral wall toward the bank portion to the bottom wall, and the extension may terminate in the buffer space.

[0013] With the above configuration, the opening area of ​​the long slit is increased, reducing resistance to the airflow. Liquid accumulated in the buffer space can be discharged through the extension of the long slit, preventing the liquid from penetrating deeply into the internal space of the casing.

[0014] The bottom wall may have a through-hole between adjacent extension portions.

[0015] According to the above configuration, the resistance to the air flow can be further reduced and the drainage performance can be further improved.

[0016] The device may further include a cooling fan disposed in the internal space, and the slit may be an intake port for allowing cooling air to flow into the internal space, or an exhaust port for allowing cooling air to flow out of the internal space.

[0017] According to the above-described configuration, the interior space of the casing can be efficiently cooled by air using the slits, and at the same time, liquid can be prevented from penetrating deeply into the interior space of the casing through the slits. [Effects of the Invention]

[0018] According to the present invention, it is possible to improve the cooling efficiency and prevent the intrusion of liquid at the same time. [Brief explanation of the drawings]

[0019] [Figure 1] 1 is a perspective view of an induction cooker according to an embodiment, seen from above, front, and right. FIG. [Figure 2] 1 is an exploded perspective view of the casing from above, front, and right. FIG. [Figure 3] FIG. 2 is a plan view of the induction cooker with the top plate and upper case removed. [Figure 4] Bottom view of an induction cooktop. [Figure 5] 1 is a perspective view of the right wall of the casing as viewed from below, front, and right. [Figure 6] Partial right side view of an induction cooker. [Figure 7A] RA-RA cross section of Figure 4. [Figure 7B] RB-RB cross section of Figure 4. [Figure 7C] RC-RC cross section of Figure 4. [Figure 8] FIG. 1 is a perspective view of the left wall of the casing as seen from below, behind, and to the left. [Figure 9A] LA-LA cross section of Figure 4. [Figure 9B] LB-LB cross section of Figure 4. [Figure 9C] LC-LC cross section of Figure 4. DETAILED DESCRIPTION OF THE INVENTION

[0020] Hereinafter, embodiments will be described with reference to the drawings. Note that the same or corresponding elements are designated by the same reference numerals throughout the drawings, and detailed descriptions thereof will be omitted.

[0021] Referring to Figure 1, the induction cooker 1 according to the embodiment is a so-called tabletop type, and is rectangular in plan view. In the following description, the extension direction of one pair of opposite sides of the rectangle is referred to as the width direction W, the extension direction of the other pair of opposite sides is referred to as the depth direction D, and the direction perpendicular to both of these directions is referred to as the height direction H. When the induction cooker 1 is placed horizontally on a table, the width direction W and the depth direction D are oriented horizontally, and the height direction H is oriented vertically.

[0022] An operating unit 9 that is operated by the user is provided on the top surface of the induction cooker 1. The operating unit 9 is located at one end in the depth direction D and is elongated in the width direction W. In the following description, one side in the depth direction D will be referred to as the "front" and the opposite side as the "rear." The "right" is one side in the width direction W, and is the right side of the induction cooker 1 when a user facing the induction cooker 1 from the front looks down on it from above. The "left" is the other side in the width direction W. However, this concept of direction is merely an example and can be changed as appropriate depending on the posture of the induction cooker 1, etc.

[0023] 1 to 4, an induction cooker 1 includes a casing 2 and a top plate 3. The casing 2 and the top plate 3 are made of a tubular material.

[0024] The casing 2 is composed of a lower case 11 and an upper case 12 above the lower case 11. The casing 2 as a whole has a rectangular, flat bottom wall 13, a peripheral wall 14 erected upward from the bottom wall 13, an internal space 15 defined by the inner surfaces of the bottom wall 13 and the peripheral wall 14, a flange 16 protruding from the upper end of the peripheral wall 14 toward the inside of the casing 2, and an upper opening 17 defined by the flange 16 and opening the internal space 15 upward.

[0025] The lower case 11 is tray-shaped and includes a bottom wall 13 and peripheral walls 14. The bottom wall 13 is rectangular in plan view. The peripheral edge of the bottom wall 13 defines the outline of this rectangular shape. The peripheral edge of the bottom wall 13 includes a front peripheral edge 13a extending in the width direction W on the front side, a rear peripheral edge 13b extending in the width direction W on the rear side, a right peripheral edge 13c extending in the depth direction D on the right side, and a left peripheral edge 13d extending in the depth direction D on the left side. The peripheral walls 14 include a front wall 14a erected from the front peripheral edge 13a, a rear wall 14b erected from the rear peripheral edge 13b, a right wall 14c erected from the right peripheral edge 13c, and a left wall 14d erected from the left peripheral edge 13d.

[0026] The peripheral wall 14 is inclined upward from the periphery, away from the bottom wall. For example, the front wall 14a is inclined forward as it extends upward, and the right wall 14c is inclined rightward as it extends upward.

[0027] The upper case 12 forms a flange 16 and defines an upper opening 17. The upper case 12 is fitted onto the upper end of the lower case 11, more specifically onto the upper end of the peripheral wall 14, from above.

[0028] Referring to Figure 4, the lower case 11 and the upper case 12 are assembled to each other with a plurality of bolts 8 that are inserted upward from the lower outer side of the bottom wall 13. Four legs 13e are provided at the four corners of the lower outer surface of the bottom wall 13. Each leg 13e is a low cylinder that protrudes downward from the bottom wall 13 and is supported on a table. When the induction cooker 1 is in use, the lower outer surface of the bottom wall 13 is raised above the table by the height of the legs 13e.

[0029] Referring to FIG. 1, the top plate 3 is attached to the casing 2 from above so as to close the upper opening 17. The lower surface of the peripheral edge of the top plate 3 is in close contact with the upper surface of the flange 16. A plug receptacle 5 is attached to the rear left corner of the casing 2. A magnetic plug 6a attached to one end of a power cord 6 is removably attached to the plug receptacle 5. When the male plug (not shown) attached to the other end of the power cord 6 is connected to a commercial power source with the magnetic plug 6a attached to the plug receptacle 5, commercial power is input to the plug receptacle 5, and the induction cooker 1 can operate using the commercial power. Power is supplied to the heating coil 4 (see FIG. 3) through the user's operation of the operating unit 9. This allows induction heating to occur in a cooking vessel (not shown) placed on the top surface of the top plate 3.

[0030] 3, the heating coil 4 is housed in an internal space 15. The heating coil 4 is disposed in the center of the internal space 15 in the depth direction D and the width direction W. In addition to the heating coil 4, the internal space 15 also houses a substrate 7 and a number of electronic components mounted thereon.

[0031] During operation of the induction cooker 1, the heating coil 4 and electronic components generate heat. To dissipate the heat, a fan 40 and a heat sink 43 are housed in the internal space 15. In this embodiment, two fans 40 (a first fan 41 and a second fan 42) are housed in the internal space 15 for air cooling. Note that only the housing of the fan 40 is shown, and the impeller rotatably supported on the housing is not shown. Both the first fan 41 and the second fan 42 are positioned closer to the right side. The first fan 41 is positioned closer to the rear, and the second fan 42 is positioned closer to the front.

[0032] The first fan 41 is a low-profile blower fan whose axial direction is oriented in the height direction H. The first fan 41 draws air upward from its bottom surface and downward from its top surface, and discharges the air radially from its side surface. The first fan 41 is supported by the casing 2 in a state slightly above the inner upper surface of the bottom wall 13. Because the bottom surface of the first fan 41 is not in close contact with the bottom wall 13, the first fan 41 can take in air from outside through the gap between the bottom surface of the first fan 41 and the inner upper surface of the bottom wall 13, or through the gap between the top surface of the first fan 41 and the underside of the top plate 3. The second fan 42 is similarly configured and positioned. The first fan 41 discharges air to the front left to cool the heating coil 4. The second fan 42 discharges air to the left. The air from the second fan 42 flows near the front end of the heating coil 4, which has a circular shape in a plan view, in a tangential direction thereof.

[0033] 3 and 4, the casing 2 is provided with an intake port 18 for allowing cooling air to flow from the outside of the casing 2 into the internal space 15, and an exhaust port 19 for allowing cooling air to flow from the internal space to the outside of the casing 2. The intake port 18 is located on the same side as the fan 40, which is on the right side in this embodiment. The exhaust port 19 is located downstream in the airflow direction of the air from the fan 40, which is on the left side in this embodiment.

[0034] The intake port 18 and the exhaust port 19 are realized by slits 30 that penetrate the casing 2. By arranging a large number of slits 30 closely together while leaving spaces between them, a closed internal space 15 is formed and air can flow into or out of the internal space 15 over a wide range.

[0035] Some of the slits serving as the air intake ports 18 are provided in the right wall 14c and form a right air intake section 18R. Some of the slits serving as the air intake ports 18 are provided in the rear wall 14b and form a rear air intake section 18r. Some of the slits serving as the air intake ports 18 are provided in the bottom wall 13 and form a bottom air intake section 18b. The right air intake section 18R is provided over almost the entire right wall 14c in the depth direction D, which is the extension direction of the right wall 14c. The rear air intake section 18r is provided near the first fan 41, i.e., at the right end of the rear wall 14b. The bottom air intake section 18b is mainly provided in an area facing the bottom surface of the fan 40. In this embodiment, the bottom air intake section 18b is also provided in an area between the first fan 41 and the second fan 42 in the depth direction D.

[0036] A portion of the slits serving as the exhaust ports 19 is provided in the left wall 14d and constitutes a left exhaust section 19L. A portion of the slits serving as the exhaust ports 19 is provided in the front wall 14a and constitutes a front exhaust section 19f. A portion of the slits serving as the exhaust ports 19 is provided in the bottom wall 13 and constitutes a bottom exhaust section 19b. The left exhaust section 19L is provided over almost the entire left wall 14d in the depth direction D, which is the extension direction of the left wall 14d. The front exhaust section 19f is provided downstream in the airflow direction of the air from the second fan 42, i.e., at the left end of the front wall 14a. The bottom exhaust section 19b is provided in the left peripheral edge section 13d.

[0037] Thus, when a large number of slits 30 are provided in the peripheral wall 14, cooling efficiency is improved, but when a user accidentally spills a liquid such as a drink or seasoning on the table, the liquid may enter the internal space 15. To prevent the liquid from entering too deeply into the internal space 15 and thereby prevent electronic components placed in the internal space 15 from being submerged in the liquid, the casing 2 is provided with a dike 20.

[0038] The embankment 20 is erected on the bottom wall 13 and faces the inner surface of the peripheral wall 14. More specifically, the embankment 20 faces an area of ​​the peripheral wall 14 where the intake port 18 or the exhaust port 19 is provided. The embankment 20 includes a right embankment 21 erected on the right peripheral edge 13c and facing the right wall 14c, a rear embankment 22 erected on the rear peripheral edge 13b and facing the right end of the rear wall 14b, a left embankment 23 erected on the left peripheral edge 13d and facing the left wall 14d, and a front embankment 24 erected on the front peripheral edge 13a and facing the left end of the front wall 14a.

[0039] The rear end of the right embankment portion 21 is continuous with the right end of the rear embankment portion 22, and the right embankment portion 21 and the rear embankment portion 22 form an integrated embankment portion on the intake side. The front end of the right embankment portion 21 is bent to the right and connected to the inner surface of the front end of the right wall 14c. The left end of the rear embankment portion 22 is bent rearward and connected to the inner surface of the right part of the rear wall 14b.

[0040] The front end of the left embankment portion 23 is continuous with the left end of the front embankment portion 24, and the left embankment portion 23 and the front embankment portion 24 form an integrated embankment portion on the exhaust side. The rear end of the left embankment portion 23 is connected to a partition wall 25 erected at the rear left corner of the bottom wall 13. The partition wall 25 connects the inner surface of the rear end of the left wall 14d to the inner surface of the left end of the rear wall 14b, and is spaced to the left from the rear embankment portion 22. The left end of the front embankment portion 24 is bent forward and connected to the inner surface of the left part of the front wall 14a.

[0041] The internal space 15 of the casing 2 is divided into a first buffer space 15b and an electrical equipment accommodating space 15a by the right embankment 21 and the rear embankment 22, and into a second buffer space 15c and the electrical equipment accommodating space 15a by the left embankment 23 and the front embankment 24. The electrical equipment accommodating space 15a is located on the opposite side of the first buffer space 15b with respect to the right embankment 21 and the rear embankment 22, and is also located on the opposite side of the second buffer space 15c with respect to the left embankment 23 and the front embankment 24. The electrical equipment accommodating space 15a occupies most of the internal space 15 of the casing 2. The heating coil 4, the circuit board 7, the fan 40, and the heat sink 43 are all disposed in the electrical equipment accommodating space 15a.

[0042] The internal space 15 of the casing 2 includes a plug receiver accommodating space 15d in which the plug receiver 5 is accommodated. The plug receiver accommodating space 15d is separated from the electrical equipment accommodating space 15a, the first buffer space 15b, and the second buffer space 15c by a partition wall 25.

[0043] The first buffer space 15b is formed between the right embankment 21, the rear embankment 22, and the right wall 14c, the rear wall 14b, and has an inverted L shape in plan view. All of the slits constituting the right intake section 18R and the rear intake section 18r open to the first buffer space 15b. On the other hand, all of the slits 30 constituting the bottom intake section 18b open to the electrical equipment storage space 15a.

[0044] The second buffer space 15c is formed between the left embankment 23 and the front embankment 24 and the left wall 14d and the front wall 14a, and is L-shaped in plan view. All of the slits 30 constituting the left exhaust section 19L and the front exhaust section 19f open to the second buffer space 15c. Unlike the configuration on the intake side, the bottom exhaust section 19b also opens to the second buffer space 15c. The bottom exhaust section 19b is provided on the left peripheral edge 13d, but not on the front peripheral edge 13a.

[0045] The following describes the structure of the right intake section 18R and the structure of the left exhaust section 19L. The rear intake section 18r and the front exhaust section 19f have the same structure as the right intake section 18R, so their description will be omitted.

[0046] 5, the right intake section 18R is configured by a plurality of slits 30 that penetrate the right wall 14c, which is an example of the peripheral wall 14, and are arranged at intervals in the depth direction D (i.e., the extending direction or longitudinal direction of the right wall 14c). Each slit 30 is generally elongated in the height direction H.

[0047] The multiple slits 30 can be classified into short slits 31 and long slits 32. The short slits 31 are relatively short in the height direction H. The long slits 32 are longer than the short slits 31 in the height direction H. One or more short slits 31 are arranged between two adjacent long slits 32. In the present embodiment, as a mere example, two short slits 31 are sandwiched between two adjacent long slits 32. In other words, two short slits 31 and one long slit 32 are arranged alternately in the extension direction (depth direction D) of the right wall 14c.

[0048] In other words, one or more short slits 31 and one long slit 32 constitute one set of module 30M. For example, in each module 30M, one or more short slits 31 are arranged in succession, and one long slit 32 is arranged next to them. Then, multiple sets of modules 30M are arranged in the extension direction of the right wall 14c (depth direction D).

[0049] The right wall 14c is offset inward (leftward) at the center in its extension direction (depth direction D). Therefore, the right wall 14c has a stepped surface 14e connecting the offset center portion with both sides of the offset center portion. The left wall 14d also has a similar stepped surface 14f (see FIG. 8). This makes it easier to carry the induction cooker 1. The slits 30 of the right intake section 18R and the left exhaust section 19L are formed in the offset center portion and on both sides of the offset center portion.

[0050] 6 and 7A to 7C, the lower ends of the short slits 31 are located higher than the lower ends of the long slits 32. In this embodiment, in each module 30M, the upper ends of the short slits 31 are located at the same height as the upper ends of the long slits 32, and the heightwise distance between the lower ends of the short slits 31 and the long slits 32 corresponds to the difference in length between the short slits 31 and the long slits 32.

[0051] The embankment 20 is higher than the upper end of the slit 30. This makes it impossible or difficult to see the inside of the electrical equipment accommodating space 15a from outside the casing 2, improving the appearance of the induction cooker 1. Furthermore, even if a rod-shaped member is inserted through the slit 30, the member cannot access the inside of the electrical equipment accommodating space 15a, improving the safety of the induction cooker 1.

[0052] The width of the short slits 31 is the same as or slightly larger than the width of the long slits 32. The interval between the slits 30 is shorter than the width of the slits 30.

[0053] 7C, the long slit 32 reaches the lower end of the peripheral wall 14 (right wall 14c) and further extends from there to the right peripheral edge 13c. That is, the long slit 32 includes a main portion 32a that penetrates the peripheral wall 14 and an extension portion 32b that extends from the main portion 32a toward the embankment portion 20 to the bottom wall 13. The extension portion 32b terminates on the outer surface of the embankment portion 20. As a result, the first buffer space 15b communicates with the outside and downward of the casing 2 via the extension portion 32b.

[0054] 8 and 9A to 9C, the left exhaust section 19L is configured by a plurality of slits 30 that penetrate a left wall 14d, which is an example of a peripheral wall 14, and are arranged at intervals from one another in the depth direction D (i.e., the extending direction or longitudinal direction of the left wall 14d). The plurality of slits 30 can be classified into short slits 31 and long slits 32 that differ from one another in dimensions in the height direction H. One or more (two, for example) short slits 31 and long slits 32 constitute a set of modules 30M, and a plurality of sets of modules 30M are arranged in the extending direction of the left wall 14d (the depth direction D).

[0055] 8 and 9C, the long slit 32 constituting the left exhaust section 19L also includes a main portion 32a penetrating the peripheral wall 14 (left wall 14d) and an extension portion 32b extending from the main portion 32a to the peripheral edge portion (left peripheral edge portion 13d) of the bottom wall 13. The extension portion 32b terminates at the outer surface of the embankment portion 20 (left embankment portion 23). As a result, the second buffer space 15c communicates with the outside and downward of the casing 2 via the extension portion 32b.

[0056] As described above, the distance from the lower end of the left wall 14d to the outer surface of the left bank portion 23 is longer than the distance from the lower end of the right wall 14c to the outer surface of the right bank portion 21. Therefore, the extension portion 32b (see FIG. 9C) constituting the left exhaust portion 19L is also longer than the extension portion 32b (see FIG. 7C) constituting the right intake portion 18R (see also FIG. 4).

[0057] 4 and 8, by increasing the distance from the lower end of the left wall 14d to the outer surface of the left embankment 23, the left peripheral edge 13d of the bottom wall 13 has a size that is visually recognizable enough as a portion defining the second buffer space 15c. In this embodiment, as an example of the slits constituting the bottom exhaust section 19b, a plurality of through holes 33 are provided in the left peripheral edge 13d and are aligned in a row at intervals in the extension direction of the left peripheral edge 13d (depth direction D). Each through hole 33 is disposed between two adjacent extension portions 32b in the depth direction D. The extension portions 32b and the through holes 33 are aligned alternately in the left peripheral edge 13d. The through hole 33 is adjacent to two short slits via the corner between the bottom wall 13 and the left wall 14d. One set of modules 30M includes one through hole 33 adjacent to two short slits.

[0058] When the induction cooker 1 configured as described above is used on a table, the first fan 41 and the second fan 42 are driven. When the first fan 41 and the second fan 42 are operating, air outside the casing 2 flows into the internal space 15 of the casing 2 through the air intakes. The intakes of both fans 40 face downward or upward within the electrical component housing space 15a.

[0059] The air intake ports 18 are provided in both the bottom wall 13 and the peripheral wall 14. This reduces the resistance to the airflow from the outside to the inside of the casing 2, thereby improving cooling efficiency. The air passing through the right air intake section 18R and the rear air intake section 18r first flows into the first buffer space 15b, then flows over the bank 20 into the electrical equipment housing space 15a. The bank 20 is slightly higher than the upper end of the slit 30 but lower than the underside of the flange 16. This prevents the airflow from becoming too high, allowing air to be smoothly taken in through the peripheral wall 14.

[0060] A portion of the airflow from the first fan 41 passes around the heating coil 4, exchanging heat with the heating coil 4 in the process. A portion of the airflow from the first fan 41 passes around the rear outer periphery of the heating coil 4, exchanging heat with the electronic components in the process. The airflow from the second fan 42 passes around the heat sink 43, exchanging heat with the heat sink 43 in the process. The airflow from the fan 40 flows generally leftward and exits the casing 2 via the left exhaust section 19L, the front exhaust section 19f, and the bottom exhaust section 19b. A large number of slits 30 are densely arranged on the left side of the casing 2, reducing resistance to the airflow from the inside to the outside of the casing 2. This improves cooling efficiency.

[0061] When using the induction cooker 1 on a table, a user may accidentally spill a drink or seasoning onto the table. For ease of explanation, the liquid that undesirably spills onto the table in this way will be referred to simply as "water" below.

[0062] It is assumed that water spilled on the right side of the induction cooker 1 will flow toward the outer surface of the right wall 14c. A large number of slits 30 are arranged over almost the entire right wall 14c to ensure air intakes 18. In this embodiment, a long slit 32 that reaches the bottom end of the right wall 14c and two short slits 31 whose bottom ends are higher than that are arranged alternately. Therefore, the part of the right wall 14c that remains below the bottom ends of the short slits 31 can block the flow of water, preventing water from entering the interior of the casing 2.

[0063] If some of the spilled water passes through the long slit 32, the water flows into the first buffer space 15b and its horizontal flow is blocked by the embankment 20. Although there is a possibility that the water that hits the embankment 20 will be splashed upward, the embankment 20 is higher than the upper end of the slit 30. Therefore, the splashed water can be prevented from going over the embankment 20 and can be kept in the first buffer space 15b.

[0064] The long slit 32 includes an extension 32b, and the first buffer space 15b communicates with the outside and below of the casing 2 via the extension 32b. Therefore, water that flows into the first buffer space 15b is drained out of the casing 2 via the extension 32b due to its own weight. This prevents water from accumulating inside the casing 2, and also prevents water from moving from the first buffer space 15b to the electrical component accommodating space 15a while the induction cooker 1 is being carried.

[0065] The same applies when water spilled on the front or rear side of the induction cooker 1 flows toward the outer surface of the front wall 14a or the rear wall 14b. The same applies when water spilled on the left side of the induction cooker 1 flows toward the outer surface of the left wall 14d. In this case, water can be more reliably prevented from reaching the electrical equipment accommodating space 15a because the second buffer space 15c has a larger capacity than the first buffer space 15b and the through-holes 33 of the bottom exhaust portion 19b as well as the extension portion 32b can also function as a drain.

[0066] Although the embodiments have been described above, the above configurations can be modified as appropriate within the scope of the present invention.

[0067] A module 30M of the slit 30 may be composed of one or more short slits 31 (other than two) and one long slit 32. That is, a certain number of short slits 31 and one long slit 32 may be arranged alternately. The number of long slits 32 constituting the module 30M may be more than one. That is, one or more short slits 31 and multiple long slits 32 may be arranged alternately.

[0068] The slits do not have to constitute multiple modules 30M. That is, when one or more short slits and one or more long slits are arranged alternately, the number of consecutive short slits and the number of consecutive long slits may be irregular. For example, they may be arranged as follows: one short slit, one long slit, two short slits, two long slits, three short slits, and one long slit. In this case, the long slits and short slits can be dispersed, and the same effects as those described above can be obtained. [Explanation of symbols]

[0069] 1 Induction cooker 2 Casing 3 Top Plate 4 heating coils 5 Plug holder 6 Power cord 6a magnetic plug 7. Circuit Board 8 volts 9 Control section 11 Lower case 12 Upper case 13 Bottom wall 13a Front margin (bottom wall) 13b Posterior margin (bottom wall) 13c Right rim (bottom wall) 13d Left periphery (bottom wall) 13e legs 14 Peripheral wall 14a Front wall (peripheral wall) 14b Rear wall (peripheral wall) 14c Right wall (perimeter wall) 14d Left wall (peripheral wall) 14e,14f Step surface 15 Interior Space 15a Electrical equipment storage space (internal space) 15b First buffer space (internal space) 15c Second buffer space (internal space) 16 flange 17 Top opening 18 Air intake 18R Right intake 18r rear intake 18b Bottom intake 19 Exhaust port 19L left exhaust 19f Front exhaust 19b Bottom exhaust 20 Embankment section 21 Right Embankment 22 Rear embankment section 23 Left Embankment 24 Front Embankment 25 Partition Wall 30 slits 30M Module 31 Short slit 32 Long slit 32a Main part 32b Extension 33 Through hole 40 fans 41 First Fan 42 Second Fan 43 Heat sink

Claims

1. a casing having a bottom wall, a peripheral wall extending from the bottom wall, and an internal space defined by inner surfaces of the bottom wall and the peripheral wall; a plurality of slits extending through the peripheral wall and spaced apart from one another; Equipped with the plurality of slits include short slits and long slits that are longer than the short slits in a height direction, and one or more of the short slits and one or more of the long slits are alternately arranged on the peripheral wall, The lower end of the short slit is located above the lower end of the long slit. Induction cooker.

2. One or more of the short slits and one of the long slits are alternately arranged on the peripheral wall. The induction cooker according to claim 1.

3. a bank portion is provided on the bottom wall so as to face the inner surface of the peripheral wall; The internal space includes a buffer space between the bank portion and the peripheral wall, and an electrical equipment accommodating space on the opposite side of the bank portion from the peripheral wall. The induction cooker according to claim 1.

4. the long slit includes an extension portion that extends from a lower end of the peripheral wall toward the bank portion to the bottom wall, and the extension portion terminates in the buffer space. The electromagnetic cooker according to claim 3.

5. The bottom wall has a through hole between adjacent extension portions. The electromagnetic cooker according to claim 4.

6. Further, a cooling fan is provided in the internal space, The slit is an intake port through which cooling air flows into the internal space, or an exhaust port through which cooling air flows out from the internal space. The electromagnetic cooker according to any one of claims 1 to 5.

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