JP3603728B2 - rice cooker - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
TECHNICAL FIELD The present invention relates to a rice cooker used for general household or business use.
[0002]
[Prior art]
Conventionally, this type of rice cooker has, for example, a configuration as shown in FIG. In the figure, reference numeral 1 denotes a cylindrical body having an open upper surface. Inside the body 1, a protective frame 2 serving as an inner pot storage portion is provided. The upper end of the protective frame 2 is engaged with the inside of the upper end of the body 1.
[0003]
Reference numeral 3 denotes an inner pot in which an outwardly projecting flange 4 is formed at the upper end opening. The inner pot 3 is detachably mounted in the protective frame 2 by placing the flange 4 on the upper surface of the upper frame 23 in a suspended state. It is arranged. An induction coil 5 is disposed outside the protection frame 2, and the induction coil 5 is formed of a heat-resistant resin material on a lower portion of the outer periphery of the protection frame 2 so that a distance to an outer peripheral surface of the inner pot 3 is constant. It is supported by the formed coil cover 6.
[0004]
Reference numeral 7 denotes an outer cover made of a synthetic resin. The outer cover 7 is rotatably supported via a pin 9 on a hinge member 8 integrally formed on an upper portion of the upper frame 23. Reference numeral 10 denotes an inner cover, and the inner cover 10 is fixed to the inner surface of the outer lid 7. A heat radiating plate 11 as a heating element is fixed to the inner cover 10, and an induction coil 12 supported by a coil support 13 is located above the heat radiating plate 11. The heat radiation plate 11 generates heat by the electromagnetic action of the induction coil 12. A sensor 14 for detecting the temperature of the heat radiating plate 11 is directly attached to the heat radiating plate 11 with an aluminum tape to regulate the temperature of the heat radiating plate 11.
[0005]
Reference numeral 16 denotes an engaging member which is located on the opposite side of the hinge member 8 and is integrally formed on the upper end portion of the protection frame 2. An engaging lever 17 is attached to the outer lid 7 by a pin 18 so as to face the engaging member 16. Is instructed to be rotatable via the. When the outer lid is closed, the pot packing 20 is pressed against the flange 4 of the inner pot 3 to seal the inner pot 3.
[0006]
Numeral 24 denotes a steam cylinder, which prevents squirt from leaking outside. Reference numeral 25 denotes a control board, which controls input and output of the current to the induction coil 12 and signals of the operation display unit 26. A cooling fan 27 cools the control board 25 and the induction coil 5.
[0007]
[Problems to be solved by the invention]
However, in the above-mentioned rice cooker, there was a problem that the size of the main body with respect to the inner pot of the rice cooker was large, and portability and installability were poor.
[0008]
SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and has as its object to realize a rice cooker having a compact structure.
[0009]
[Means for Solving the Problems]
In order to solve the above problems, the present invention controls an inner pan detachably housed in a main body, a bottom heating coil for induction heating the inner pan, and a supply state of high-frequency power to the bottom heating coil. detection and control unit, and a lid covering the upper portion of the body, and the inner steam pipe and generated steam disposed in the lid in order to enable discharge within the pot, an increase in Oneba within the steam tube to And a control unit for instructing the control unit to select a rice cooking function. As the demand increases, the demand accumulates in a lower portion of the demand and the internal pressure is reduced. A float that moves by ascending, and a float detection unit that detects the movement of the float, the float moves when the lid is opened and closed, and the float detection unit detects the movement of the float. it detects the opening and closing of the lid, before The control unit controls the amount of power supply to the bottom heating coil according to the detection state of the sleep detection unit, and inhibits input of an operation signal of the operation unit for a predetermined time after the lid is closed. is there.
[0010]
BEST MODE FOR CARRYING OUT THE INVENTION
First aspect of the present invention, an inner pot which is detachably housed in the body, and a bottom heating coil for induction heating the inner bowl, and a control unit for controlling the supply state of the high-frequency power to the bottom heating coils A lid for covering an upper portion of the main body, a steam cylinder disposed on the lid so as to be able to discharge steam generated in the inner pan, and a need detection for detecting a rise of the tongue in the steam cylinder. Means, and an operation unit for instructing the control unit to select a rice cooking function , wherein the rice noodle detection means moves as the rice noodles accumulate in the lower part thereof and rises in internal pressure. Float, has a float detection unit that detects the movement of the float, the float moves when the lid is opened and closed, the opening and closing of the lid by detecting the movement of the float with the float detection unit it detects, wherein, prior to In accordance with the detection state of Oneba detecting means controls the electric power supplied to the bottom heating coils, by comprising a prohibiting an operation signal input of a predetermined time the operating unit after the lid is closed, when the cover opening and closing Malfunction can be reliably prevented.
[0011]
【Example】
(Example 1)
First Embodiment A first embodiment of the present invention will be described with reference to FIGS. As disclosed in the drawings, the feature of the present invention lies in a device for realizing a compact arrangement of the operation board and the cooling fan, a steam cylinder, a bottom sensor, a heating board, and the like. The ingenuity will be described in order.
[0012]
First, when the rice cooker main body 31 is installed on an induction heating material such as stainless steel, the material is induction-heated and there is a risk of generating heat. It was common to leave a predetermined distance between them. In addition, since there is such a distance, the height direction of the bottom sensor 33 can be designed with a sufficient margin.
[0013]
However, in order to make the main body 31 compact, it is necessary to reduce the space of the bottom surface space. For this purpose, several measures are taken. First, as shown in FIG. 5, a magnetic shield 34 made of aluminum or the like is arranged on the bottom surface of the main body 31, so that the lower part of the main body 31 has a structure in which magnetism hardly passes. The installation of the magnetic shield 34 is a well-known technique in an electromagnetic cooker and the like. However, when the magnetic shield is used in the present rice cooker, the aluminum part of the bottom sensor 33 is removed and the magnetic shield 34 is arranged. By making the ferrite face the joint between the magnetic shield 33 and the magnetic shield 34, the magnetic shield effect is further enhanced.
[0014]
Next, as a second measure for shortening the vertical distance, shortening the height direction of the bottom sensor 33 becomes an issue. In this regard, the linearity of the spring 36 for contacting the bottom sensor 33 with the bottom surface of the inner pot 35 is made thinner than before, so that the spring 36 is maintained against the pot bottom while maintaining the same contact pressure as before. It is possible to shorten the height direction. In addition, the signal line 38 and the thermal fuse 39 from the bottom thermistor 37 are not drawn out from the bottom of the bottom sensor 33 as in the conventional case, but are drawn out from a part of the cylindrical portion 40 to shorten the vertical direction. I have. At this time, in order to improve the attachment of the signal line 38, a U-shaped notch 41 is provided from the bottom surface of the cylindrical portion 40 of the bottom sensor 33, and the signal line 38 is laid at the position.
[0015]
Further, if the height of the cylindrical portion 40 of the bottom sensor 33 is made lower than necessary, heat may be trapped inside the bottom sensor 33, and the sensitivity of the bottom thermistor 37 may be deteriorated. A protrusion 43 is provided below the bottom sensor 33 within the height of the foot 42 of the main body to shorten the distance between the inner pot 35 and the bottom surface of the main body 31 while increasing the height of the cylindrical portion 40 of the bottom sensor 33. Have secured.
[0016]
In addition, in order to prevent the magnetic field generated by the bottom heating coil 32 from leaking out of the rice cooker main body and promote induction heating to the inner pot 35, the bottom heating coil 32 is conventionally provided on the outer periphery of the bottom heating coil 32. Approximately six ferrites 44 are radially arranged in the perpendicular direction, but three of them are fixed to cover the outer coil 44. That is, the inner coil 45 has a smaller skin area than the outer coil 44, and the anti-magnetic effect is secured by arranging the anti-magnetic plate 34 of aluminum or the like on the main body side of the bottom surface of the inner coil 45. Depending on the reasons. Therefore, with this structure, it is easier to keep the height direction of the main body 1 low.
[0017]
(Example 2)
Next, contents related to the lid and the like will be described with reference to FIGS. Conventionally, handling of an operation board, a heating board, and the like, which are arranged on a front portion and a bottom portion in a main body, will be described. Conventionally, the spatial distance of the bottom of the main body has been indispensable to avoid unnecessary heating of the rice cooker mounting portion as described above. Therefore, such a space portion is used as a place for mounting an operation board for enabling the front surface operation, but by arranging the parts around the lower portion of the lid portion and the hinge portion of the main body, This eliminates the need for the space of the unit, and makes effective use of the space below the hinge and inside the lid, making it possible to reduce the size of the front and bottom surfaces of the main body.
[0018]
However, in order to dispose the operation board 46 inside the lid 47, there are the following problems. First, a cover coil 49 for heating a detachable radiator plate 48 provided on the lower surface of the cover 47 is provided inside the cover 47, so that the cover coil 49 must be structured so as not to be easily affected by a magnetic field. was there. Further, since it is necessary to dispose the steam cylinder 50, the lid sensor 51, and the like inside the lid 47, it is necessary to restrict the arrangement place and to suppress the unnecessary increase in the weight of the lid 47. .
[0019]
In order to solve the above problem, first, the lid ferrite 52 is arranged near the lower part of the microcomputer or the IC arranged on the operation board 46 to reduce the influence of the magnetic field on the microcomputer or the IC of the lid coil 49. . As a method of arranging the lid ferrite 52, the one conventionally arranged radially in the longitudinal direction with respect to the lid coil 49 as shown in FIG. 23 has now been arranged along the lid coil 49 as shown in FIG. And the number of lid ferrites 52 is reduced from six to three. This focuses on the area covered by the lid ferrite 52 in the circumferential direction. Since one strip-shaped lid ferrite 52 is about three times as long in the vertical direction as in the horizontal direction, the number of the lid ferrite 52 is reduced by half. Even if it is reduced, the cover range in the circumferential direction of the cover coil 49 increases, so that it is possible to obtain an effect of the same performance or more with about half the cover ferrite 52 of the related art. With such a configuration, the influence of the magnetic field in the circumferential direction can be reduced as compared with the related art, and the weight of the lid 47 can be suppressed from increasing.
[0020]
Next, by providing the lid sensor 51 directly below the operation board 46 disposed inside the lid 47, it is possible to effectively utilize the space inside the lid 47 and to perform a design in consideration of assemblability. Was.
[0021]
A specific configuration will be described below. A detachable heat radiating plate 48 is provided inside the lid 47. This is designed so that the user of the rice cooker can attach and detach the rice cooker so that the user can always use the rice cooker while keeping cleanliness. However, if rice is cooked with the radiator plate 48 removed, satisfactory rice cooking performance cannot be obtained. Therefore, it is necessary to detect whether the radiator plate 48 is securely attached. Further, in recent rice cookers, in order to improve the rice cooking performance, means for detecting the temperature in the inner pot 35 and estimating the rice cooking state from the temperature is employed, and the lid sensor 51 has such a function. Has been combined.
[0022]
The lid sensor 51 is urged downward by a sensor spring 53 so as to abut against the heat radiating plate 48. At the same time, by surrounding the lid thermistor 4 with aluminum or the like, the influence of the magnetic field due to the lid coil 49 is avoided. are doing. Further, unlike the bottom sensor 33 described above, the lid sensor 51 does not apply a large load to the lid sensor 51 itself, so that the strength and the like of the sensor spring 53 can be suppressed lower than that of the bottom sensor 33. , It is possible to make it compact. On the other hand, in order to prevent vapor or the like from entering the inside of the lid 47, it is necessary to provide a packing 55 around the lid sensor 51 to ensure the sealing property of the part.
[0023]
Further, the center of the cylindrical bottom surface of the lid sensor 51 is depressed. This is to improve the temperature detection performance by pressing the entire bottom portion against the heat sink 48. Also, for this purpose, the cylindrical lid sensor 51 itself does not force the left and right axes of the lid sensor 51 to move horizontally when moving up and down, and can cope with a slight inclination of the heat sink, and The configuration is such that the periphery of the depression is provided on the heat sink 48 at three points.
[0024]
As shown in FIG. 7, when the heat radiating plate 48 is mounted on the lid 47, the lid sensor 51 is pushed upward. However, due to the upward movement, a part of the cylindrical portion constituting the lid sensor 51 is formed. The movement of the attached magnet 56 is recognized by a reed switch 57 or the like, and the mounting of the heat sink 48 can be confirmed.
[0025]
Here, by integrally mounting the lid sensor 51 on the mounting unit 58 of the operation board 46, the operation board 46 and the lid sensor 51 can be handled as a unit, and the assembling property is improved. In addition to the assemblability, by arranging the lid sensor 51 below the operation board 46, the signal line from the lid thermistor 54 can be shortened, and noise is easily superimposed on the signal line. Can be avoided.
[0026]
Further, in order to prevent the inside of the lid 47 from becoming excessively hot, the operation board 46 is not provided with a heat generating component such as a triac, and the lid thermistor 54 is arranged directly below the operation board 46. In addition to detecting the temperature of the heat radiating plate 48, it is also possible to directly detect whether the temperature has reached a level that adversely affects the operation board 46.
[0027]
In this embodiment, the detection of the mounting state of the radiator plate 48 uses the magnet 56 and the like that are linked to the vertical movement of the lid sensor 51. However, the present invention is not limited to this embodiment. It is also possible to detect by the installed heat sink magnet 58.
[0028]
Further, while pursuing the design by making the upper part of the lid 47 a flat structure, it is necessary to prevent a spoon or the like from being heated when it is apt to be erroneously mounted on such a place by mistake. There is. Therefore, a magnetic shield 59 made of aluminum or the like is provided above the cover coil 49 inside the cover 47.
[0029]
Further, in this embodiment, the operation board 46 and the like are arranged inside the lid 47, the parts on the front part of the main body 31 are deleted, and the parts are integrated around the lower part of the hinge part 60 on the rear part of the main body 31. As a result, the center of gravity of the main body is located on the rear side, and when the lid is opened, the entire main body may be inadvertently fallen backward. Therefore, it is necessary to prevent such a situation.
[0030]
That is, the lid 47 of this embodiment releases the engagement of the portion by pressing the hook lever 61 and simultaneously urges the lid 47 in the opening direction by the hinge spring 61 provided on the hinge portion 60. Since there are no heavy parts on the front surface of the main body 31, when the lid 47 is opened, the situation is such that it is easy to fall backward with excessive force. Therefore, as shown in FIG. 12, a leaf spring 63 is mounted on the hinge portion 60 so as to increase the urging force in the closing direction as the opening angle of the lid 47 increases. As shown in FIG. 12, the leaf spring 63 has a structure in which as the opening of the lid 47 increases, the contact angle to the resin portion 64 increases so that the urging force in the opposite direction gradually increases. . With this configuration, it is possible to prevent the body 31 from accidentally falling to the rear due to the momentum when the lid 47 is opened. As shown in FIG. 16, a rib 65 is provided substantially at the center of the rear surface of the main body 31 to prevent the main body 31 from tipping over.
[0031]
Regarding the handle for carrying the main body 31, the center of the main body 31 is prevented in order to prevent the main body 31 from being tilted backward when the main body 31 is lifted, because the heavy parts are disposed below the hinge portion 60. A shaft is mounted on the rear side to provide a good center of gravity for better portability.
[0032]
(Example 3)
Next, contents around the steam cylinder will be described with reference to FIGS. In order to keep the height of the lid 47 low, the steam cylinder 50 is also kept low in the vertical direction as compared with the conventional case, and has a combined function of detecting the open / closed state of the lid 47.
[0033]
More specifically, a steam cylinder 50 having a float 66 movable inside when the lid 47 is opened and closed, and a float detection unit 67 for detecting the movement of the float 66 are provided around the steam cylinder 50. Detects the opening and closing of the lid 47 by utilizing the movement of the lid 47 to the hinge portion 60 when the lid 47 is opened.
[0034]
Further, the float 66 is disposed so as to cover the upper portion of the steam outlet 68 when the lid 47 is closed, and the float 6 is formed by a cylindrical or spherical magnet, while the steam cylinder 50 is formed. A groove 69 for guiding the movement of the float 66 is provided on the lower surface of the float 66, and a convex portion guided by the concave groove 69 attached to the float 66 is provided over the entire circumference. Further, the groove 69 forms a passage for the tongue when the tongue occurs, and also serves to prevent the float 66 from becoming immovable due to the tongue.
[0035]
Further, regarding the configuration of the float 66 or the like, for example, a magnetic material may be used for the float 66, a reed switch may be used for the float detection unit 67, or an optical sensor may be used for the float detection unit 67, for example. A method of detecting the presence of 66, for example, based on the presence or absence of its reflection, etc., is conceivable, but in any case, the weight of the float 6 is not immovable only by steam, but moves with rising of the bed. And the inclination angle of the bottom of the steam cylinder 50. According to experiments, the relationship between the weight, etc., and the weight of the bed, when a cylindrical float is used, if the bottom angle is set to about 12 degrees, the weight of about 2 to 4 grams can be prevented from spilling when cooking rice. The result was correct.
[0036]
Although the internal volume of the steam cylinder 50 is reduced for compactness, the movement of the float 66 is detected by the float detection unit 67, and a high-frequency wave to the bottom heating coil 32 or the like is detected in accordance with the detected content. The supply of electric power is controlled, and with this configuration, it is possible to use the steam cylinder 50 that is smaller in space than before. That is, with the rise of the tongue, the tongue accumulates in the lower part of the float 66, the float 66 moves due to an increase in the internal pressure, and the float detection unit 67 operates, whereby the above-described effect is obtained.
[0037]
In the present embodiment, the difference between the cat and the steam is detected by the movement of the float or the like. However, the detection is not necessarily performed by using the dynamic movement or the like, but the viscosity or the stick of the cat is required. A difference in physical properties such as heat capacity may be used.
[0038]
Further, ribs are provided on the side surface near the final point of the movement of the float 66 so that the inside of the steam cylinder 50 is not damaged by the sudden movement of the float 66 caused by the rapid opening and closing of the lid 47. ing. Furthermore, the surface of the float 66 is covered with a resin in order to have the same effect. According to this configuration, the sound generated when the float 66 moves can be suppressed low.
[0039]
In addition, the steam cylinder 50 is detachable as in the conventional case, so that the user can freely wash the whole body. However, since the outlet 68 is provided at the lowest point on the bottom surface, the water after the washing is not filled. It is difficult to remain in the steam cylinder 50, and the cleanliness can be secured also in this regard.
[0040]
The detection of the open / closed state of the lid 47 utilizes the fact that the float 66 provided inside the steam cylinder 50 is separated from the float detection unit 67 when the lid 47 is opened. Then, it is conceivable to close the cover 47 by pressing the upper part thereof. On the other hand, since the operation board 46 is provided on the upper part of the lid 47, it is expected that the lid 47 is closed by mistake while the operation button or the like is being pressed. Therefore, after the lid 47 is shifted to the closed state, the key input on the operation board 46 is prohibited from being accepted for a predetermined time, and the operation unintended by the user is prohibited. Also, at this time, a message to that effect is displayed on the display unit so that the user can easily understand why the key is not accepted.
[0041]
In addition, when the lid 47 is closed by mistake, it is assumed that the lid 47 has been pressed for a long time, and a key that is difficult for the user to execute, for example, a selection key for a rice cooking course or the like is placed on the center front. Avoid placing. Therefore, if a key such as a rice cooker start key is received, the user closes the lid 47 with a key whose upper part of the lid 47 is relatively easy to recognize the change. It is located where it is easy to hold down.
[0042]
(Example 4)
Next, the structure around the lower part of the hinge 60 will be described with reference to FIGS. There are some problems in arranging the heating substrate 70 and the like below the hinge 60, but in particular, there are problems in securing the cooling performance and dropping water droplets from around the hinge 60.
[0043]
The area around the hinge 60 is a place where water adheres when steam or the like or when the inner pan 35 is attached, and water easily enters the inside of the main body along the area around the hinge 60. Therefore, in order to dispose the heating substrate 70 at the relevant location, it is essential to ensure insulation of the electric components. In addition, when the heating board 70 is provided below the hinge section 60, there is a problem in that the operation board 46 disposed on the lid 47 and the lead wire 71 electrically connected through the hinge section 60 are routed. In order to solve the problem, as shown in FIG. 20, the lead wires 71 are arranged in an S-shape in the vertical direction. With such a configuration, the structure is such that water or the like flowing along the lead wire 71 does not reach the heating substrate 70. Specifically, in order to make the lead wire 71 into the above-mentioned S-shape, the vertical ribs 72 and 73 are alternately arranged on the hinge portion 60, and at the lowest point 74 of the S-shaped wiring. The opposing portion is extended so as to be provided with a slight gap from the inside of the main body 31, and an electric component such as the heating substrate 70 is arranged inside the leading end of the extended portion 75.
[0044]
In addition, a fan-shaped rib or the like is provided on the cover plate 76 of the hinge portion 60 to prevent water drops from dropping on the heating substrate 70 or the like by mistake.
[0045]
As for the cooling performance, the cooling fan 77 is arranged at the lower corner of the main body to cool the bottom heating coil 32, the heating substrate 70, and the like.
Specifically, since the heating substrates 70 and the like are collectively arranged in a narrow space below the hinge portion 60, a problem related to heat radiation is likely to occur. Therefore, as shown in FIG. 21, the cooling fan 77 is disposed at a lower corner of the main body 31, and an intake hole 78 is provided in a main body portion facing the cooling fan 77. Further, by providing the exhaust holes 79 on the lower front surface and the lower side surface of the main body, the cool air sucked from the intake holes 78 is smoothly guided to the front or the side via the heating substrate 70 and the bottom heating coil 32.
[0046]
In this regard, conventionally, the cooling fan 77 is horizontally disposed below the main body, but in the present invention, when the main body 31 is downsized, the cooling fan 77 is horizontally disposed below as it is, so that satisfactory cooling is achieved. Performance could not be obtained. This is because the distance between the inner pan 35 and the bottom surface of the main body 31 is shortened due to the downsizing, so that when the cooling fan 77 is arranged horizontally, it is not possible to obtain a sufficient cooling air suction space, This is because the resistance of the air path at the lower portion of the cool air fan 77 has increased. Also, in a horizontal arrangement, it is one of the causes of an increase in wind path resistance due to the difficulty of flowing cool air forward. Therefore, the cooling fan 77 is disposed obliquely, the lower corner of the main body 31 has a large radius, and the intake hole 78 is disposed at such a portion to oppose the cooling fan 77.
[0047]
Further, as shown in FIG. 22, the code reel 80 is disposed at a corner of the main body 31, and one of the heating substrate 70 and the power supply substrate 81 is disposed at a corner opposite to the code reel 80. With this structure, the space below the hinge portion 60 is effectively used, but at this time, the cord reel and the like are arranged along the protection frame 82 surrounding the outer periphery of the inner pot 35 in the vertical direction. It becomes possible to surround the frame in a wide range, and also has a heat insulating structure for playing a role of a heat retaining effect of the inner pot 35.
[0048]
In the code reel 80, the power supply line terminal 82 side, which is a connection portion with the power supply board 81, faces outward, and the drawer 83 of the code reel 80 faces the rear surface of the main body 31. According to this structure, the outer body of the code reel 80 functions as a wind direction guide that guides the cool air of the cooling fan 77 to the heating substrate 70 side.
[0049]
Further, as shown in FIG. 23, the drawer 83 of the power cord of the code reel 80 is configured to be discharged from the bottom rear of the main body 31. Can be used also as the rib 65 for preventing the body from falling over. Further, since the main body side of the code reel 80 is magnetically shielded by the exterior of the code reel 80, an unsuitable component that generates heat by a magnetic field, such as a sensor, is mounted.
[0050]
Further, a cooling fin 84 is disposed at right angles to the heating substrate 70, and a cooling fan 77 is mounted on the cooling fin 84. The cooling fins 84 have a substantially triangular cross section, and the blades 85 of the cooling fins 84 are arranged before and after the main body 31 in order to guide the flow of cool air from the intake hole 78 at the rear of the main body 31 to the side surface or the front surface of the main body 31. It is arranged to head. Also, in order to secure cooling by attaching the heat-generating components of the heating board 70 to the cooling fins 84 and to suppress an impact due to dropping of the main body, a screw mounting portion 86 is provided in a part of the heating board 70, A cooling fin 84 is screwed to 86.
[0051]
In addition, regarding the lead wire for supplying the current to the bottom heating coil 32, the bottom heating coil 32 and the wiring portion on the heating board 70 were conventionally connected by a connector provided on the heating board 70. However, the connector section usually needs a large one to supply a large current, which tends to hinder compactness of the main body. For this reason, the wiring of the heating substrate 70 is a board-in type or the like, avoiding the burden on the connection portion on the heating substrate 70, and providing the terminal terminal connection portion 87 on the protection frame 82 to ensure good assembly and space. are doing.
[0052]
Further, the heating substrate 70 placed on the cooling fins 84 is arranged on the lower side for components generating a large amount of heat, and the upper space is effectively used as a cooling space. Specifically, an IGBT or the like for controlling the supply of high-frequency power to the bottom heating coil 32 is attached to the cooling fin 84, and a rectifying element or the like that generates relatively large heat is disposed on the lower side.
[0053]
A rib 88 is provided in the vicinity of the intake hole 78 to prevent the exhaust air from the exhaust hole 79 and the cool air for intake from being mixed, and the rib 88 is also used as the above-mentioned rear-turning rib. are doing. Similarly, a guide rib 89 for air guide is provided inside the main body 31 to prevent the intake and exhaust air from being mixed, thereby reducing the load on the cooling fan.
[0054]
(Example 5)
Next, the structure of the side surface and the like will be described with reference to FIGS. A side surface heating coil 90 for heating the inner pan 35 from the side surface is provided on a side surface of the protection frame 82. The side surface heating coil 90 is provided with a protection frame body in order to reduce the number of parts and the number of assembly steps. It is structured to engage with an L-shaped groove 92 provided in the portion 91.
[0055]
Conventionally, the mounting of the side surface heating coil 90 is fixed to the protection frame body 91 by a tape or the like. However, a hook portion which is an L-shaped groove 92 is provided on the side surface of the protection frame body 91, and the hook portion is provided. Is fixed by being engaged with. With such a configuration, the installation position of the side surface heating coil is stabilized, the rice cooking performance can be improved, and the cost for the tape can be reduced.
[0056]
In addition, by providing a corner on the lower surface of the main body along the shape of the pot, a structure in which the degree of freedom of the placement of the main body is further increased.
[0057]
Also, as compared with the conventional rice cooker, since the arrangement of components in the space from the inner pot 35 to the front outside of the main body 31 is prevented as much as possible, the distance from the inner pot 35 to the front outside of the rice cooker is reduced, and the user However, in the case of eating rice, the usability is further improved. Further, by setting the height of the front portion of the main body 31 to be equal to or less than the upper surface of the inner pot 35, the usability when cooking rice is further improved.
[0058]
【The invention's effect】
As described above, the invention according to claim 1 includes an inner pan detachably housed in a main body, a bottom heating coil for induction heating the inner pan, and a supply state of high-frequency power to the bottom heating coil . A control unit for controlling, a lid covering an upper part of the main body, a steam cylinder disposed on the lid so as to be able to discharge steam generated in the inner pan, A sleep detecting means for detecting, and an operating unit for instructing the control unit to select a rice cooking function, wherein the sleep detecting means accumulates in the lower part of the lower part of the rice with the rise of the rice, and the internal pressure Having a float that moves due to the rise of the float, and a float detection unit that detects the movement of the float, the float moves when the lid is opened and closed, and the movement of the float is detected by the float detection unit. it detects the opening and closing of the lid, before Control unit, in accordance with the detection state of the detection means if Ne said contact, to control the electric power supplied to the bottom heating coils, by comprising a prohibiting an operation signal input of a predetermined time the operating unit after the lid is closed In addition, a malfunction at the time of opening and closing the lid can be reliably prevented.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view of a main part of a rice cooker according to a first embodiment of the present invention; FIG. 2 is a cutaway sectional view of a main part of the rice cooker; FIG. FIG. 4 is a perspective view of a main part of a bottom sensor of the rice cooker. FIG. 5 is a schematic view of a bottom part of the rice cooker. FIG. 6 is a schematic view of a lid coil of the rice cooker according to the second embodiment of the present invention. 7 is a cross-sectional view of a main part of the lid of the rice cooker. [FIG. 8] is a cross-sectional view of a main part of the rice cooker. FIG. 9 is a cross-sectional view of a main part around the lid of the rice cooker. FIG. 11 is a schematic view of the periphery of the lid coil of the rice cooker. FIG. 11 is a cutaway sectional view of the periphery of the lid of the rice cooker. 14 is a cross-sectional view of the vicinity of the hinge of the rice cooker. FIG. 15 is a cutaway view of the vicinity of the hinge of the rice cooker. FIG. External view of the main body [Figure 1] FIG. 18 is an external view of a steam cylinder of a rice cooker according to a third embodiment of the present invention. FIG. 18 is a sectional view of a main part of the steam cylinder of the rice cooker. FIG. FIG. 20 is a view showing a state of a lead wire around a hinge portion of the rice cooker according to the fourth embodiment of the present invention. FIG. 21 is an external view of a main part around a cooling fan of the rice cooker. ], The arrangement of parts of the rice cooker [Fig. 23], the external view of the main part of the bottom of the rice cooker [Fig. 24], the cutaway view of the main part of the rice cooker [Fig. 25], the heating board of the rice cooker FIG. 26 is an exploded view of a rice cooker according to a fifth embodiment of the present invention, in which the vicinity of a heating substrate is cut. FIG. 27 is an exploded view of a main part around a side coil of the rice cooker. FIG. 28 is a conventional rice cooker. Cross section of main part of [Description of reference numerals]
31 inner pot 32 bottom heating coil 33 bottom sensor 35 inner pot 46 operation board 47 lid 48 radiator plate 49 lid coil 50 steam cylinder 60 hinge part 66 float 67 float detector 70 heating board 77 cooling fan

Claims (1)

An inner pan detachably housed in the main body, a bottom heating coil for induction heating the inner pan, a control unit for controlling a supply state of high-frequency power to the bottom heating coil, and a lid for covering an upper part of the main body When the said steam being disposed in the lid steam generated in the pot in order to enable the discharge tube, a detection means if Ne Contact detecting the rise in Oneba in the steam tube, rice to the control unit An operating unit for instructing selection of a function, wherein the sleep detecting means detects a float in which a sludge accumulates at a lower portion thereof and moves due to a rise in internal pressure with the rise of the sleep, and a movement of the float. A float detection unit for detecting, wherein the float moves when the lid is opened and closed, and the opening and closing of the lid is detected by detecting the movement of the float with the float detection unit, and the control unit Is the detection of the above-mentioned bed detecting means Depending on the state, the controls the electric power supplied to the bottom heating coils, rice cooker comprising a prohibiting an operation signal input of a predetermined time the operating unit after the lid is closed.

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