JPH0824124A - Electric rice cooker - Google Patents

Abstract

PURPOSE:To provide a safe electric rice cooker wherein water due to moisture condensation or the like hardly enters an electrical section. CONSTITUTION:An upper section surrounding a vessel body 1 has an outer rising section 21 and a hinge rising section 22 on an outer frame, together with an inner rising section 23 on an inner frame. The section 21 is formed to have smaller height than the sections 22 and 23. Also, the section 22 is extended over an area larger than an exhaust port 17 thereunder along a horizontal direction. According to this construction, water stagnating in space among the sections 21, 22 and 23 is discharged over the section 21, and does not enter the body 1. Also, water does not enter the body 1 via the exhaust port 17.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric rice cooker used in homes and the like.

[0002]

2. Description of the Related Art Generally, an electric rice cooker is provided with a main body for accommodating pans and a lid for opening and closing the upper openings thereof. In recent electric rice cookers, a lid heater is provided on the lid body, and by appropriately controlling the on / off of the lid heater, when the lid body is opened immediately after cooking rice, and when the temperature is kept thereafter, Condensation of vapor on the inner surface of the lid body is prevented, and normally, there is no possibility that dew condensation occurs on the inner surface of the lid body and the dew drops down to the upper surface portion around the body of the container.

However, sometimes, in order to prevent the deterioration of rice, some users do not keep the temperature by pulling out the power cord from the outlet after the rice is cooked. In this case, since the lid heater is not heated, dew condensation occurs on the inner surface of the lid body, and when the lid body is opened, the dew on the inner surface drips onto the upper surface portion around the main body of the container. In order to receive such dew, conventionally, the upper surface of the peripheral portion of the container body is formed in a groove shape by forming rising portions on its inner peripheral side and outer peripheral side. And
In the conventional electric rice cooker, the rising portion on the inner peripheral side and the rising portion on the outer peripheral side are made to have the same height, or the rising portion on the inner peripheral side is made lower than the rising portion on the outer peripheral side. Therefore, if the electric rice cooker is moved while water is considerably accumulated on the upper surface of the bowl main body, the water accumulated on the upper surface of the bowl main body easily flows into the inside of the bowl main body. Then, if the water that has flowed down into the main body of the equipment falls on the electrical equipment section, tracking may occur and a short circuit may cause ignition, which may cause a fire.

Further, in an electric rice cooker using an induction coil for induction heating as a main heating source for rice cooking, a blower is provided for cooling the induction coil and electric parts for driving the induction coil. . In addition to the induction coil provided on the lower outer side of the inner frame of the main body, an electric heater provided with a body heater with a small heating amount on the upper outer side of the inner frame for supplementary heating and heat retention during rice cooking. There is also a rice cooker. In the conventional rice cooker of this type, the body heater communicates with the blower without much resistance. Therefore, the body heater is likely to be cooled by the blown air, resulting in poor efficiency and poor heating effect. Further, since the air is blown to a wide space in the main body of the device, the efficiency of cooling the induction coil and the like is deteriorated.

[0005]

As described above, in the conventional electric rice cooker, the inner peripheral side rising portion and the outer peripheral side rising portion have the same height on the upper surface around the body of the cooker. Alternatively, since the rising part on the inner circumference side was made lower than the rising part on the outer circumference side, if dew condensation occurred on the inner surface of the lid body and it dripped down and accumulated on the upper surface part of the vessel body, this accumulated water There was a problem that it easily fell into the body and had a bad effect on electrical components.

Further, in the conventional electric rice cooker, since the blower for cooling the induction coil which is the main heating source communicates with the body heater which is the auxiliary heating source without much resistance, the efficiency of heating by the auxiliary heating source is high. However, there is a problem that the efficiency of cooling the induction coil is poor.

The present invention is intended to solve such a problem, and even when dew condensation occurs on the inner surface of the lid body and it is dripped and accumulated on the upper surface of the main body of the vessel, the accumulated water It is a first object of the present invention to provide a safe electric rice cooker that is unlikely to flow into the inside of the main body of the bowl and is unlikely to be caught by electric components inside the main body of the bowl. A second object is to more surely prevent water from entering a portion of the container body where an electric component is provided. A third object of the present invention is to provide an electric rice cooker capable of efficiently cooling the parts to be cooled, such as the induction coil, which is the main heating source, while efficiently heating the auxiliary heating source.

[0008]

In order to achieve the first object, the invention according to claim 1 has an outer frame part and an inner frame part which form a space part for housing the electrical component part therebetween. A vessel main body having an upper surface opening on the upper side of the inner frame section, and a pan having an upper surface opened which is detachably accommodated in the vessel main body,
A lid body that is rotatably supported by a hinge portion on the vessel body and that openably and closably closes the upper openings of the vessel body and the pan.
A main heating source disposed on the lower outer side of the inner frame portion, a lid heating source disposed on the inner surface side of the lid body, and a blower disposed in the space of the vessel body, An exhaust port communicating with the exhaust side of the blower is provided at a lower portion of the outer frame part of the device body located below the hinge part, and the device body has an outer rising part and an outer rising part on the outer frame part side of the upper surface part. While having a hinge portion side rising portion located on the hinge portion side,
The inner frame part of the upper surface part has an inner rising part, the outer rising part is lower than the hinge part side rising part and the inner rising part, and the hinge part side rising part is the exhaust gas in a horizontal direction. It is provided in a wider area than the mouth.

In order to achieve the second object, the invention according to claim 2 has an outer frame part and an inner frame part which form a space part containing the electrical component part therebetween, and the upper side of the inner frame part. A vessel body having an upper surface opening, a pan having an upper surface opened which is detachably accommodated in the vessel body, and a top and bottom opening of the vessel body and the pan which are rotatably supported by a hinge portion on the vessel body. A lid body that freely closes, a main heating source that is disposed on the lower outer side of the inner frame portion, a lid heating source that is disposed on the inner surface side of the lid body, and a space portion of the container body. And a blower that is provided, the vessel main body has an inner rising portion on the inner frame portion side of the upper surface portion, and a flange portion on the upper portion of the pot partially provided by projecting upward to this inner rising portion. It is equipped with a pan support that can be placed on the outside of the inner rising part on the upper surface of the vessel body. Has a fitting portion to be fitted into the fitting hole formed in the above, and a cover piece located outside the fitting hole and covering the fitting portion of the pot support is located on the upper surface of the vessel body. It is provided so as to hang downward, and a cover edge portion that covers the cover piece from the lower side and the outside is provided on the inner frame portion of the container body.

According to a third aspect of the invention, in the electric rice cooker according to the first or second aspect of the invention, in order to achieve the third object as well, the main heating source including an induction coil and the inner frame portion are provided. A coil base provided along the outside to support the main heating source, and a sub-heating source arranged on the outer upper portion of the inner frame portion are provided. Thus, a flange portion is provided to shut off the main heating source and the blower side from the sub heating source side.

[0011]

In the electric rice cooker according to the first aspect of the present invention, originally, the lid heating source heats the steam to prevent dew condensation on the inner surface of the lid during cooking and during the subsequent heat retention. However, if the user turns off the power after cooking rice or while keeping warm, dew condensation will occur on the inner surface of the lid, and when the lid is opened, the dew on the inner surface will be the dew on the top surface of the main body. It hangs down and accumulates between the outer rising portion, the hinge-side rising portion, and the inner rising portion. The accumulated water is
Even if it flows down, since the outer rising portion is lower than the hinge-side rising portion and the inner rising portion, the outer rising portion easily gets over the outer rising portion and flows down to the outside of the container body, and does not easily fall inside the container body. Along with this, the water does not easily get over the rising part on the hinge side, but this rising part on the hinge part is in a wider area than the exhaust port in the horizontal direction, so the water that has flowed down travels on the outer surface of the main unit and It is also prevented from entering the inside of the main body through the mouth.

Further, in the electric rice cooker of the invention of claim 2,
There is a fitting hole where the fitting part of the pan support stand fits on the outside of the inner rising part on the upper surface of the bowl body, but should the water on the pan fall down through the fitting hole, The water that has flowed down from the fitting hole is guided by the cover piece that hangs down from the upper surface of the main body and covers the fitting part from the outside, and the cover edge that covers the cover piece in the inner frame part from below and outside. Therefore, it is not guided to the inside of the inner frame part, and does not enter the space part between the inner frame part and the outer frame part where the electric component part is provided.

Further, in the electric rice cooker according to the third aspect of the present invention, when the rice is cooked, the inner frame portion is induction-heated by the induction coil which is the main heating source in the lower portion of the inner frame portion of the cooker body. The sub-heating source on the upper side supplementally heats the inner frame portion during rice cooking and heats it during heat retention. Then, the blower cools the main heating source, but the flange portion of the coil base supporting the main heating source shuts off the main heating source and the blower side and the sub heating source side in the space of the main body of the unit, Most of the air blown from the blower does not reach the auxiliary heat source.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the electric rice cooker of the present invention will be described below with reference to the drawings. Reference numeral 1 is a container body, 2 is a pan that is detachably accommodated in the container body 1, and 3 is a lid body that opens and closes the top openings of the container body 1 and the pan 2.

The vessel body 1 is composed of an outer frame 11, an inner frame 12, a bottom plate 13 and the like. These outer frame 11 and inner frame 12
Between the bottom plate 13 and the bottom plate 13, there is a space 14 containing an electric component described later.
Are formed. The outer frame 11 and the bottom plate 13 are
Made of plastic such as polypropylene, the inner frame
12 is made of self-extinguishing plastic which is a non-metal material. The outer frame 11 forms an outer frame portion on the outer periphery of the container body 1 and a peripheral upper surface portion 15. The inner frame 12
Has a container shape with an open upper surface, and forms an inner frame portion on the inner periphery of the container body 1. The bottom plate 13 forms the lower surface side of the container body 1. An intake port 16 is formed in the lower surface of the bottom plate 13 so as to face the space 14, and a plurality of slit-shaped exhaust ports 17 are formed in the lower rear surface of the outer frame 11. The bottom plate
A plurality of legs 18 are provided on the lower surface of 13 and
A cord reel device 19 for winding the power cord is provided.

Further, on the upper surface portion 15 of the container body 1, an outer rising portion 21 and a hinge side rising portion 22 are formed so as to project upward on the outer frame portion side, and an inner rising portion 23 on the inner frame portion side.
Are formed so as to project upward. These rising parts 21, 22,
The reference numeral 23 covers the entire circumference of the container body 1, but the hinge-side rising portion 22 is located on the rear surface portion of the container body 1. The outer rising portion 21 is lower than the hinge-side rising portion 22 by H1 and lower than the inner rising portion 23 by H2. Further, the hinge-side rising portion 22 is located above the exhaust port 17, but is extended by a length L on both sides of the exhaust port 17 in the horizontal direction.
It covers a wider area than this exhaust port 17.

Further, the inner rising portion 23 has a plurality of pot support bases, for example, three places, which evenly surround the opening of the inner frame portion.
26 are projected upward and fixed respectively. These pot support bases 26 are made of an elastic material such as silicone rubber. The pot support base 26 has a substantially U-shaped cross section and is fitted to the inner rising portion 23. However, the outer fitting portion 27 is the inner rising portion 23 on the upper surface portion 15 of the container body 1. Is fitted in a fitting hole 28 formed on the outer side of. Further, a cover piece 29, which is located outside the fitting hole 28 and covers the fitting portion 27 of the pan support 26, is formed on the upper surface portion 15 of the container body 1 so as to hang downward. On the other hand, a cover edge portion 30 having a substantially L-shaped cross section, which is bent toward the outer peripheral side and further bent upward, is formed at the upper edge portion of the inner frame 12 over the entire circumference. The lower edge of the cover piece 29 abuts on the horizontal portion 30a of the cover edge portion 30, and the vertical portion 30b of the cover edge portion 30 covers the cover piece 29 from the outside.

Further, on the outer surface of the inner frame 12, induction coils 36 and 37 as main heating sources are provided at positions from the central portion of the lower surface and the peripheral portion of the lower surface to the lower portion of the peripheral surface. Along with this, the induction coil 36, 37 is covered from the outside with an inner frame.
The coil base 38 made of self-extinguishing plastic, which is a non-metal material, is fixed to the outer frame 11 and the inner frame 12 by screws 39 and 40. The coil base 38 has an inner frame 12
Although it is located along the outer lower portion of the above, it has a flange portion 41 at the upper edge portion. The outer peripheral edge of the flange portion 41 is located close to the inner surface of the outer frame 11, whereby the space portion 14 in the main body 1 of the container is substantially cut off from the lower space portion 14a and the upper space. It is divided into a part 14b. A ferrite core 42, which is located outside the induction coils 36 and 37 and has a directivity orthogonal to the induction coils 36 and 37, is provided on the coil base 38 to prevent leakage magnetic flux from the ferrite core 42. Further, on the upper outer surface of the inner frame 12, a resistance type body heater 43 as a sub-heat source is provided. The body heater 43 is located above the flange portion 41 of the coil base 38, and thus is located in the upper space portion 14b. When the vertical width of the body heater 43 is H3, the height H4 from the flange portion 41 to the upper edge of the body heater 43 is H3 or more, but within H3 × 2.

On the other hand, a blower 46 for cooling the induction coils 36, 37 and electric parts for driving the induction coils 36, 37 is provided in the lower space 14a. This blower 46
It is composed of a fan 47 and a motor 48 that rotationally drives the fan 47, and the intake side communicates with the intake port 16, and
The exhaust side communicates with the exhaust port 17.

At the center of the coil base 38, a pan sensor 51 is provided so as to be vertically movable within a predetermined range. The pan sensor 51 is biased upward by a spring 52 and protrudes upward through an opening 53 formed in the central portion of the lower surface of the inner frame 12, and is housed in the inner frame 12. It is elastically abutted on the lower surface of the pot 2. The pan sensor 51 has a built-in thermistor 54 for detecting the temperature of the pan 2. Further, a tubular portion 55 that opens downward is formed in the inner frame 12 near the opening portion 53, and a thermal fuse 56 is built in this tubular portion 55.

A high frequency circuit board 61 is disposed below the ferrite core 42 in the lower space 14a of the main body 1. In this high-frequency circuit board 61,
The induction coils 36 and 37 are incorporated with an inverter or the like for supplying a high frequency current. On the other hand, the container body 1
A power unit board 62 and a control board 63, which are control boards, are provided in the front of the space 14 of the unit case made of metal for fixing them.
Incorporated through 66. This unit case 66
Is a substantially flat metal plate integrally formed with a stepped portion 67 at the center in the vertical direction, the power supply substrate 62 is supported on the lower side thereof, and the operation substrate 63 is supported on the upper side thereof. As shown in detail in FIG. 4, curl portions 68 are formed on the upper and lower portions of the unit case 66 for fixing the unit case 66 to the container body 1, and a lower mounting piece 70 is formed on the lower portion. ing. The curls 68 are fitted into the recessed grooves 71 formed on the lower side of the upper surface 15 of the outer frame 11, and the lower mounting pieces 70 are formed on the coil base 38. It is fixed to the boss 73 by screws 74. In this way, the unit case 66 is fixed in the container body 1.

Further, in the unit case 66, an intermediate support piece 76 is formed by cutting and raising forward at the center of the upper side of the step 67, and lower supporting pieces 77 are formed by cutting and raising forward on both sides of the lower portion. There is. And the intermediate support piece
A projecting piece 79 formed at the center of the upper edge of the power supply board 62 is inserted into a through hole 78 formed in the rear side of the power supply board 62, and both lower support pieces 77 have screws 80 on both lower sides of the power supply board 62. It is fixed by. In this way, the power supply board 62 becomes the unit case 66.
It is supported through a gap of 10 mm or more.
In addition, the unit case 66, together with the intermediate support piece 76, a pressing piece 8 for pressing the peripheral portion of the operation board 63 from the rear side.
1 and 82 are bent forward at the upper portions on both left and right sides and the center of the upper side, and upper support pieces 83 are bent forward at both sides of the upper pressing piece 82. Then, the projections 85 formed on both sides of the upper edge of the operation board 63 are inserted into the through holes 84 formed in the upper support pieces 83, and the projections formed on the tip edge of the intermediate support piece 76 are inserted. The piece 86 is inserted into a through hole 87 formed in the lower center of the operation board 63. In this way, the operation board 63 is supported by the unit case 66 with a gap of a constant dimension of 10 mm or more. In addition, this gap is 10
The reason why it is set to mm or more is to ensure the insulation between the metal unit case 66 and the substrates 62 and 63.

A relay, a transformer and the like are incorporated in the power supply board 62. On the other hand, the operation board 63
A liquid crystal display panel 91 for displaying the setting status of a timer, a rice cooking course, and the like, a light emitting diode for displaying a rice cooking and heat retaining process, a microcomputer, and the like are incorporated therein. Further, an operation panel 92 is provided on the upper front surface of the outer frame 11 so as to face the operation board 63.

The unit case 66 includes an intermediate support piece.
Located above the cutout 96 by cutting and raising 76,
A draining guide piece 97 is formed by cutting and raising it toward the rear lower side.

The pot 2 is in the shape of a container with an open top, but has a flange portion 101 on the upper edge. The flange portion 101 is to be placed on the pan support base 26 of the vessel body 1. With the pot 2 housed in the bowl body 1, a gap 102 is formed between the outer surface of the pot 2 and the inner surface of the inner frame 12, and the pot support base 26 is partially formed. Since there is only one, a gap 103 for communicating the gap 102 with the space above the pan 1 is also formed between the flange portion 101 and the inner rising portion 23 of the container body 1. In addition, the pot 2 has an aluminum plate 104 on the inner surface side and a ferrite-based SUS on the lower portion on the outer surface side.
It is made of a magnetic metal material 105 such as 430.

The lid 3 includes an outer lid 110 made of plastic such as polypropylene, a lower lid member 111 fixed to the inner side, that is, a lower side of the outer lid 110, and a metallic lid fixed to the lower side of the lower lid member 111. The bottom plate 112 and this lid bottom plate 11
2 Internal metal lid 113 detachably attached to the underside
It consists of The inner lid 113 closes the top opening of the pot 2. In addition, a packing 114 is provided in the peripheral portion of the lid lower surface plate 112 so as to be in close contact with the flange portion 101 of the pot 2 when the lid body 3 is closed. The outer lid 110
Is rotatably supported on the upper rear portion of the main body 1 by a hinge portion 116. The axial direction of the support shaft 117 of the hinge portion 116 is the left-right direction. Further, one end of the torsion spring 118 wound around the support shaft 117 is engaged with the main body 1 and the other end is engaged with the outer lid 110, whereby the lid 3 is opened. Is urged to. Further, a clamp button 119 is pivotally mounted on the upper front surface of the container body 1, while a receiving claw 120 is formed on the outer lid 110 so that the clamp button 119 can be detachably engaged. The clamp button 119 is biased by a spring 121 in a direction in which the engagement with the receiving claw 120 is maintained.

Further, a resistance type lid heater 126 which is a lid heating source and a lid sensor 127 which is a thermistor for detecting the temperature of the lid lower surface plate 112 are fixed on the upper surface of the lid lower surface plate 112. ing. Further, a steam port portion 128 is provided penetrating the lid lower surface plate 112 and the outer lid 110.

Next, the operation of the above configuration will be described. With the lid 3 closed, the clamp button 119
Press to release it from the catch claw 120. with this,
The lid 3 is automatically rotated upward by the force of the torsion spring 118 to open, and the top opening of the pot 2 is opened. Then, in order to cook rice, the pot 2 is taken out, rice and water are put in the pot 2, and then the pot 2 is put in the body 1 again and the lid 3 is closed. Along with this, the clamp button 119 engages with the receiving claw 120, and the lid 3 is kept closed. In this state, the upper surface opening of the pan 2 has an inner lid 113 and packing.
It is sealed by 114.

When the operation panel 92 is operated to start cooking rice, the induction coils 36 and 37 are energized with a high-frequency current, so that the pot 2 is induction-heated. Further, during rice cooking, the body heater 43 and the lid heater 126 are also appropriately energized. Directly, the body heater 43 heats the inner frame 12, and the lid heater 126 heats the lid lower surface plate 112. After the rice is cooked, the temperature is shifted to the heat retention step, and the cooked rice is kept at a substantially constant temperature. In this heat retention process, the body heater 43 and the lid heater 126 are appropriately energized, and then the induction coils 36, 37
Is also energized intermittently. In the above steps of rice cooking and heat retention, induction coils 36, 37 and heaters 43,
The energization of 126 is controlled according to the program set in the microcomputer and the temperature detected by the pan sensor 51 and the lid sensor 127. It should be noted that rice can be cooked by setting a timer.
Several courses can be selected.

Further, by driving the blower 46, an airflow from the intake port 16 to the exhaust port 17 is generated in the space 14 of the main body 1.
As a result, the induction coils 36, 37 and the vicinity of the high frequency circuit board 61 are cooled.

By the way, when the lid 3 is opened or the temperature is kept after the rice is cooked, the heating of the lid heater 126 prevents dew condensation on the inner surface of the lid 3, that is, the lower surface of the inner lid 113. However, when the user turns off the power after finishing the rice cooking, dew condensation occurs on the inner surface of the lid body 3,
When the lid 3 is opened, the dew on the inner surface of the lid 3 hangs down on the upper surface portion 15 of the container body 1 and accumulates between the rising portions 21, 22, 23. If the electric rice cooker is inadvertently moved in this state, the water accumulated between the rising portions 21, 22, 23 may flow down, but the outer rising portion 21 has the hinge-side rising portion 22 and the inner rising portion. Since it is lower than 23, the water accumulated between the rising parts 21, 22, 23 will run down,
It will be discharged to the outside of the container body 1 after overcoming the outer rising portion 21. That is, the water accumulated between the rising portions 21, 22, and 23 does not easily get over the inner rising portion 23, so that the container body 1
It does not easily flow into the inside of the. Along with this, the water does not easily get over the hinge-side rising portion 22, but since this hinge-side rising portion 22 is in a wider area than the exhaust port 17 in the horizontal direction, the water that has flowed down falls behind the vessel body 1. It is also prevented from entering the inside of the main body 1 through the exhaust port 17 located under the outer surface on the side. Therefore, it is possible to prevent water from splashing on the electrical components inside the container body 1, eliminate the risk of fire or electric shock, and it is safe.

Further, the inner rising portion is formed on the upper surface portion 15 of the container body 1.
There is a fitting hole 28 for assembling the pan support base 26 on the outside of 23, but even if a small amount of water attached to the flange 101 of the pan 2 drops down along the fitting hole 28, it fits. The water that has flowed down from the hole 28 is integrated with the upper surface portion 15 of the vessel body 1 so that the pot support 26
Of the inner frame 12 by being guided by a cover piece 29 which covers the fitting portion 27 of the outer cover from the outside and a cover edge 30 which covers the cover piece 29 from the lower side and the outer side at the upper edge of the inner frame 12. Guided inside,
It is unlikely that it will enter the space 14 between the inner frame 12 and the outer frame 11 having the electrical component. Therefore, it is possible to prevent water from splashing on the electrical components inside the space 14. The water that has entered the inner frame 12 flows down from the opening 53 at the center of the lower surface of the inner frame 12, but since there is no electrical component below it, the intake port on the lower surface of the bottom plate 13 does not interfere with the electrical component. It is smoothly discharged from the holes such as 16 to the outside of the main body 1.

Further, although it is impossible in the first place,
Even if water drops that have entered from the fitting hole 28 or the like fall along the back side of the unit case 66, that is, the rear side, as shown by the arrow A in FIG. The guide of the water draining guide piece 97 does not intrude into the substrate 62, 63 side from the notch hole 96.

Since the electric rice cooker is used in a place where water is used, such as in a kitchen or a kitchen, there is a risk that the electric rice cooker may be accidentally splashed with water and enter into the fitting hole 28. However, even in this case, it is possible to prevent water from splashing on the electrical component as described above.

Further, according to the structure of the above embodiment, the flange portion 41 formed on the upper portion of the coil base 38 causes the induction coils 36 and 37, the blower 46 side, and the body heater 43 to be arranged in the space 14 of the main body 1. The air blown from the blower 46 is
It hardly reaches the body heater 43. Therefore, cooling of the body heater 43 by the blower 46 can be prevented, and heating by the body heater 43 can be made efficient. On the other hand, the effective blow of the blower 46 is limited to the narrower space 14a in the space 14 in the main body 1, so that the parts to be cooled, such as the induction coils 36 and 37 and the high frequency circuit board 61, can be removed. Can be cooled efficiently. Moreover, the body heater 43
Since the height H4 from the flange 41 to the upper edge of the body heater 43 is less than H3 × 2 with respect to the width H3 of the body heater 43, the body heater 43 can be easily attached at the time of manufacturing and the heat retention efficiency is further improved. .

In a conventional electric rice cooker of this type, a control unit such as a control board arranged in the front part of the main body of the rice cooker is held in a resin case such as polypropylene. However, with a resin case such as polypropylene,
If a short circuit should occur due to intrusion of water, there is a risk of fire. To prevent this, it is necessary to use a flame-retardant material for the resin case, but this causes an increase in cost. On the other hand, in the above-described embodiment, the power supply board 62 and the operation board 63, which are control boards, are held in the metal unit case 66, so for some reason, if the pattern side of the boards 62 and 63 is short-circuited or leaks. Even if you do, there is no danger that the unit case 66 will ignite or burn,
Safety is improved.

Also, the metal unit case 66 can be made inexpensive and the cost of parts can be reduced. At the same time, it is advantageous in terms of recycling of waste materials.

Further, in order to assemble the unit case 66 to the main body 1, the curl portion on the upper part of the unit case 66
After the 68 is inserted into the groove 71 of the outer frame 11 and positioned, the lower mounting piece 70 at the bottom of the unit case 66 is attached to the coil base 38.
Since it is only necessary to screw it on, the number of assembly steps can be reduced. Further, when assembling the boards 62 and 63 to the unit case 66, the support pieces 76, which are integrally formed on the unit case 66,
With 77, 83, etc., it can be done easily with a small number of steps.

The present invention is not limited to the above embodiment, and various modifications can be made. For example,
In the above embodiment, the upper surface portion 15 of the container body 1 is integrated with the outer frame 11, but the upper surface portion of the container body may be integrated with the inner frame,
Alternatively, the frame member may be formed separately from the inner frame and the outer frame.

[0040]

According to the invention of claim 1, an outer rising portion and a hinge portion rising portion located on the hinge portion side for the lid are provided on the outer frame portion side of the upper surface portion of the main body, and Since the inner rising part is provided on the frame part side, the outer rising part is lower than the hinge part side rising part and the inner rising part, and the hinge part side rising part is provided in a range wider than the exhaust port in the horizontal direction. If the dew condensation on the inner surface of the lid body accumulates between the rising portions, the water that collects between the rising portions will get over the outer rising portions and be discharged to the outside of the main body even if it drips. In addition, it does not drip into the exhaust port and prevents water from entering the inside of the main body. Therefore, it is possible to prevent water from splashing on the electrical components inside the main body and improve safety. To do.

Further, according to the second aspect of the present invention, the pan support base has a fitting portion to be fitted into a fitting hole formed outside the inner rising portion on the upper surface of the vessel body. On the other hand,
A cover piece that is located outside the fitting hole and covers the fitting portion is provided on the upper surface of the main body by hanging downward, and a cover piece that covers the cover piece from below and outside is provided on the inner frame portion of the main body. Since the rim is provided, even if the water that was attached to the pot drops from the fitting hole, this water will be guided into the inner frame and enter the space between the inner frame and the outer frame. Therefore, it is possible to prevent water from splashing on the electrical equipment portion in this space portion, and safety is improved.

Further, according to the invention of claim 3, a main heating source formed of an induction coil provided in a lower portion of the inner frame portion, a coil base provided outside the inner frame portion and supporting the main heating source, While there is a sub-heat source provided in the upper part of the inner frame part, in the upper part of the coil base, a flange part that shuts off the main heat source and the blower side from the sub heat source side in the space inside the main body of the device. Since it is provided, it is possible to prevent the sub-heating source from being cooled by the blower, and the heating by the sub-heating source can be made efficient, while the cooled portion of the space becomes narrower, It is possible to efficiently cool the parts to be cooled such as the induction coil which is the heating source.

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing a first embodiment of an electric rice cooker of the present invention.

FIG. 2 is a transverse sectional view of the same.

FIG. 3 is a perspective view from the above rear side.

FIG. 4 is a perspective view of the same unit case and control board.

[Explanation of symbols]

 1 Vessel Main Body 2 Pan 3 Lid 11 Outer Frame (Outer Frame) 12 Inner Frame (Inner Frame) 14 Space 17 Exhaust Port 21 Outer Rise Part 22 Hinge Side Rise Part 23 Inner Rise Part 26 Pan Stand 27 Fit Joint part 28 Fitting hole 29 Cover piece 30 Cover edge part 36, 37 Induction coil (main heating source) 38 Coil base 41 Flange part 43 Body heater (sub heating source) 46 Fan 116 Hinge part 126 Lid heater (lid heating source)

Claims (3)

[Claims] 1. A container main body having an outer frame part and an inner frame part that mutually form a space part containing an electrical component part, and an upper surface opening on the upper side of the inner frame part, and detachable in the container main body. A pan with an open top surface, a lid body rotatably supported on the container body by a hinge portion to openably and closably close the top openings of the container body and the pan, and an outer lower part of the inner frame part. A main heating source provided, a lid heating source provided on the inner surface side of the lid, and a blower provided in the space of the vessel body are provided, and are located below the hinge portion. Has an exhaust port communicating with the exhaust side of the blower in the lower portion of the outer frame portion of the device body, and the device body has an outer rising portion on the outer frame portion side of the upper surface portion and a hinge located on the hinge portion side. In addition to the inner side rising part, the inner side rising part is The outer rising portion is lower than the hinge portion side rising portion and the inner rising portion, and the hinge portion side rising portion is provided in a range wider than the exhaust port in the horizontal direction. Electric rice cooker. 2. A vessel main body having an outer frame section and an inner frame section which form a space section containing an electric component section therebetween, and an upper surface opening on the upper side of the inner frame section, and detachable in the vessel main body. A pan with an open top surface, a lid body rotatably supported on the container body by a hinge portion to openably and closably close the top openings of the container body and the pan, and an outer lower part of the inner frame part. A main heating source provided, a lid heating source provided on the inner surface side of the lid body, and a blower provided in a space of the vessel body, the vessel body being provided in an upper surface portion. It has an inner rising portion on the frame side, and is provided with a pan supporting base partially provided so as to project upward on the inner rising part and on which a flange portion of the upper portion of the pan rests, and the pan supporting base is the vessel main body. Has a fitting portion to be fitted into a fitting hole formed outside the inner rising portion on the upper surface of On the upper surface of the vessel body, a cover piece located outside the fitting hole and covering the fitting portion of the pot support is provided by hanging downward, and the cover piece is provided on the inner frame portion of the vessel body. An electric rice cooker having a covering edge portion that covers from the lower side and the outside. 3. The main heating source composed of an induction coil, a coil base provided along the outer side of the inner frame portion to support the main heating source, and a sub-element disposed on the upper outer side of the inner frame portion. A heating source is provided, and a flange portion for disconnecting the main heating source and the blower side from the auxiliary heating source side is provided in an upper space of the coil base in a space inside the main body. The electric rice cooker according to 1 or 2.