TW201922154A - Electric rice cooker - Google Patents

Abstract

Provided is an electric rice cooker which does not require complicated control and is capable of cooking more delicious steamed rice while having a simple structure. According to the present invention, a cooking pot 12 comprises an earthenware pot body 18 and a lid body 22, wherein: the lid body 22 is exposed to the outside at an upper opening 106 of a pot-receiving recess 14; an air passage 102 that expands in the circumferential and vertical directions is formed between the circumferential wall section 70 of the pot receiving recess 14 and the pot body 18 of the cooking pot 12; an upper end opening 104 of the air passage 102 directly communicates with the outside at the upper opening 106 of the pot receiving recess 14; a lower end opening 108 of the air passage 102 communicates with the inside of a rice cooker body 16; and a controller 82 drives a blower fan 80 during a steamed rice steaming process, so that the external air introduced from the lower end opening 108 of the air passage 102 is continuously discharged from the upper end opening 104 without staying inside the air passage 102.

Description

Electric pot

The invention relates to an electric pot using a rice cooker made of pottery.

Conventionally, electric cookers have been widely used as a device that can easily manage heating time and the like and can easily cook rice. In recent years, an electromagnetic induction heating type electric pan such as described in Japanese Patent No. 4910441 (Patent Document 1), which has high heating efficiency and can quickly cook delicious rice, has also become widespread.

It is known that rice cooked in an earthen pot made of pottery is directly heated by a heat source, so it is evenly heated to the core of the rice by the effect of radiant heat from the heated pottery and boiled up one by one. Delicious rice. Therefore, as described in Patent Gazette 1, a structure is also proposed in which an inner pot made of ceramics is used even for an electromagnetic induction heating type electric pot, and a metal material with a high dielectric efficiency is coated on the bottom and near the bottom of the inner pot. With this, the metal paste is induced to heat by electromagnetic induction heating, and the inner pot is heated indirectly.

However, if a non-metal inner pot made of ceramics or the like is used, compared with the case of an inner pot made of magnetic metal, the thermal conductivity deteriorates and heat unevenness is easily generated, making it difficult to achieve uniform heating of the boiled matter. Therefore, a structure is proposed in which the hot air obtained by cooling the electromagnetic induction heating mechanism with the wind from the fan will not stay in the narrow hot air storage space provided around the side of the inner pot, thereby , The low temperature part of the inner pot is heated to achieve the uniform heating of the inner pot.

However, with the degree of heating of the inner pot caused by the accumulation of hot air, sufficient and rapid homogenization of the inner pot cannot be achieved, and as a result, it is not sufficient for cooking rice that satisfies those in need. In addition, the fan must be used for the purpose of heating the inner pot. Therefore, the fan is blown at the scheduled time during the cooking step, or the fan is intermittently driven at the step. The drive control of the fan is easy to become complicated and has problems. . [Prior Art Literature] [Patent Literature]

[Patent Document 1] Japanese Patent No. 4910441

[Problems to be solved by the invention]

The present invention is formed with the above-mentioned circumstances as a background, and provides a novel structure of an electric cooker that can be cooked into a more delicious rice with a simple structure without requiring complicated control. [Means for solving problems]

Hereinafter, aspects of the present invention formed to solve the problems described above will be described. In addition, the constituent elements used in each of the forms described below may be used in any combination.

A first aspect of the present invention is an electric cooker, which includes: a rice cooker that accommodates an object to be cooked; a rice cooker body that has a pot accommodation recess that accommodates the rice cooker in a removable manner; an electric heater, It is arranged on the bottom wall part of the pot accommodating recess to heat the rice cooking pot; a fan is arranged in the body of the rice cooker; and a control part controls the electric heater and the fan; The electric cooker is characterized in that the rice cooker is composed of a pot body made of pottery containing the object to be cooked and a cover body covering the opening of the pot body, and is located in the pot accommodating recess of the rice cooker body. In a state where the rice cooking pot is accommodated, the lid body is exposed to the outside in the opening above the pot accommodation recess, and on the other hand, the peripheral wall portion of the pot accommodation recess and the pot of the rice cooking pot A ventilation path extending in a circumferential direction and an up-and-down direction is formed between the bodies; and the upper opening of the ventilation path is directly connected to the outside in the upper opening of the pot accommodating recess. On the other hand, the ventilation path Lower end The mouth is in communication with the body of the rice cooker, and the control unit drives the fan in the step of cooking rice so that outside air introduced from the lower opening of the air passage will not stay in the air passage. On the other hand, it is continuously discharged from the upper opening.

According to the present invention, a structure is adopted in which not only an electric heater is provided on the bottom wall portion of the pot accommodating recess of the rice cooker body, but also a pot body made of ceramics is accommodated in the pot accommodating recess, and the electric heater is used for direct heating Pot body. As a result, similar to the traditional stove, the slow temperature rise of the pot body or the homogenization of the temperature when the temperature rises can be achieved by clever use of the pot body directly heated by the pottery, and then the high heat storage property after heating And deliciously cooked rice. In addition, since the heat source uses an electric heater, the control unit can control the on / off of the electric heater, and the convenience of an electric cooker such as a rice cooker can be maintained as it is.

Furthermore, the lid system covering the opening portion of the pottery pot body of the rice cooker is exposed to the outside in the opening above the pot receiving recess in a state where the cooking pot is accommodated in the pot receiving recess of the rice cooker body. . In this way, the upward heat dissipation of a rice cooker made of a material with high heat storage stability can be ensured stably, and unnecessary rice burnt caused by the high heat storage property of the pot body can be prevented easily and conveniently. Wait.

In addition, the upper end opening of the air duct extending in the circumferential direction and up and down direction between the peripheral wall portion of the pot accommodating recess and the pot body of the rice cooking pot is tied to the upper opening of the pot accommodating recess and directly to the outside. Connected. For the air supply path of this structure, the control unit drives the air supply fan in the step of cooking rice so that the outside air introduced from the opening at the lower end of the air supply path does not stay in the air supply path and is continuously discharged from the upper opening. . Therefore, in the first step in which the heat storage property of the pot body made of ceramics becomes a problem, only by driving the fan, the outside air can continuously pass through the air supply path, and the whole cooling of the pot body can be promoted. Especially, since the opening at the upper end of the air supply path communicates directly with the outside, the rapid air discharge from the air supply path can be realized, the air can be prevented from staying, and the pot body can be quickly cooled.

In addition, in the rice cooker, the lid body does not necessarily need to be made of pottery, and any material other than pottery can be made of casting or glass. In addition, the pot body made of ceramics has a high heat storage property, and the bulk density measured by JIS A 1509 is 1.5 g / cm ³ to 2.3 g / cm ³ , and preferably 2.0 g / cm ³ to 2.1 g / cm ³ . The water absorption of the pot body made of ceramics measured by JIS A 1509 is set to 6 to 12%, preferably 8 to 10%.

The second aspect of the present invention is the one described in the above-mentioned first aspect, wherein the control unit continuously drives the blower fan for a period of 70% or more of the entire period of the step from the beginning of the step. The air continuously passes through the air supply path, and the electric heater is turned off.

According to this form, in the step in which the heat storage property of the pot body made of ceramics becomes a problem, the electric heater is turned off and the outside air is continuously introduced into the air supply path for a period of 70% or more from the beginning. The heat dissipation of the pot body can be quickly implemented, and the temperature of the pot body suitable for the step can be maintained, and a full and delicious rice can be cooked. In addition, the continuous driving of the fan in this form and the state of turning off the electric heater can be implemented within a period of 70% or more from the beginning of the step. Depending on the content of cooking, it may not be driven at the end of the step. The fan is blown and the electric heater is turned off, and the step of removing excess moisture is incorporated, or the continuous driving of the fan and the state where the electric heater is turned off are maintained during the entire period of the step.

A third aspect of the present invention is the one described in the first or second aspect, wherein the control unit does not drive the blower fan in a step other than the step (i).

According to this aspect, since the fan is not driven in steps other than the step, the heat dissipation of the pot body made of pottery caused by the air passing through the air supply path can be prevented, and the heat storage of the pot body made of pottery can be advantageously realized. Sex cooking.

The fourth aspect of the present invention is as described in any one of the first to third aspects, wherein the air supply path has a ring shape and extends between the peripheral wall portion of the pot accommodating recess and the pot body. The entire opening is extended. The upper opening of the air supply path is formed by an upper annular gap formed between the upper edge of the peripheral wall portion and the upper edge of the pot body. On the other hand, the air supply path The lower end opening portion is formed by a lower annular gap provided between the peripheral wall portion and the bottom wall portion.

According to this form, the air supply path has a ring shape extending throughout the entire circumference between the peripheral wall portion of the pot accommodating recess and the pot body, and both the upper opening portion and the lower end opening portion of the air supply path exhibit openings throughout the entire circumference. Ring shape. Thereby, the insertion of outside air through the air supply path is not hindered, and a faster insertion of outside air and the cooling of the pot body caused by it can be achieved.

A fifth aspect of the present invention is the one described in any one of the first to fourth aspects, wherein a size of a gap between the peripheral wall portion and the pot body in the air supply path is increased toward the upper end opening portion.

According to this form, since the gap size of the air supply path is enlarged toward the upper opening portion, it is possible to more reliably avoid the retention of external air in the air supply path, and to achieve faster penetration of external air and the pot body caused by it. cool down.

A sixth aspect of the present invention is the one described in any one of the first to fifth aspects, wherein a ring-shaped groove portion opened on the upper side of the upper opening portion side of the rice cooker body and the above The peripheral wall portion is provided connected to the outer peripheral side, and the bottom wall of the annular groove portion is provided so as to be lower than the front end portion of the peripheral wall portion. On the other hand, it is on the upper end of the pot body of the rice cooking pot. The edge portion is provided with a flange portion that expands to the outer peripheral side, and an outer peripheral end surface of the flange portion is provided so as to be directly above the annular groove portion, and a bottom surface of the flange portion is provided with It is inclined downward toward the outer peripheral side and close to the bottom wall of the annular groove portion.

According to this aspect, the outer peripheral end surface of the flange portion provided on the upper edge portion of the pot body is located directly above the annular groove portion of the rice cooker body provided below it. Thereby, even if the boiling overflow during cooking is leaked to the outside along the flange portion, it can be accommodated in the annular groove portion, and cleaning after use can be easily performed. In addition, the bottom surface of the flange portion is inclined downward as it approaches the bottom wall of the annular groove portion as it goes toward the outer peripheral side. Therefore, boiling over is prevented from entering the pot accommodating recess along the bottom surface of the flange portion in advance. side.

A seventh aspect of the present invention is the one described in any one of the first to sixth aspects, wherein the cover of the rice cooker includes an inner cover that covers the opening of the pot body and is flat. Expansion; and an outer cover that is disposed above the inner cover and forms a steam storage space between the inner cover and the inner cover; and that the wall thickness of the inner cover is greater than the wall thickness of the outer cover.

According to this form, the lid body of the rice cooker has a double lid structure of an inner lid and an outer lid, and a steam storage space is formed between the inner lid and the outer lid, so that the inner pot body can be stably maintained during cooking. The pressurized state of the part or soaking. Furthermore, the inner lid not only covers the opening of the pan body and expands flatly, but also has a thicker wall than the outer lid. Therefore, the weight of the inner portion of the pan body during cooking can be more reliably maintained by the weight of the inner lid. , Can achieve good cooking.

An eighth aspect of the present invention is the one described in any one of the first to seventh aspects, wherein the electric heater includes the following: a first sheathed heater that places the bottom of the pot body The center; and a second sheathed heater, on which the bottom periphery of the pot body is placed.

According to this aspect, the first sheath heater and the second sheath heater can be individually turned on / off or power controlled according to the rice cooking step. Thereby, the temperature distribution of the pot body when cooking rice can be adjusted more favorably.

A ninth aspect of the present invention is the one described in the eighth aspect, wherein the control unit uses both the first sheathed heater and the second sheathed heater in the step of heating the rice, and the other In one aspect, in the subsequent cooking step, at least one of the first sheath heater and the second sheath heater is used.

According to this form, at least one of the first sheathed heater and the second sheathed heater placed on the center of the bottom of the pot body can be used in the cooking step by utilizing the heat storage property of the pot body made of ceramics. With this, the heat storage property of the pot body made of ceramics can be used to cook rice in a power-saving manner. A tenth aspect of the present invention is the one described in the ninth aspect, wherein only the first sheathed heater is used in the cooking step.

The eleventh aspect of the present invention is the one described in any one of the eighth to tenth aspects, wherein the power value in the heating step of the first and second sheathed heaters is in the heating step. At the beginning, lower than the power value of the water absorption step.

According to this form, the time of the water absorption step is skillfully used to heat the pot body made of pottery that requires time to warm up, and the temperature in the pot body can be achieved from the beginning of the heating step. Furthermore, by temporarily reducing the power of the heater at the beginning of the heating step, the temperature in the pot body can be maintained in a state most suitable for cooking rice.

The twelfth aspect of the present invention is the one described in any one of the first to eleventh aspects, wherein the control unit includes a drying mode, which is accommodated in the pot body that does not contain the object to be accommodated in the pot accommodation. In the recessed state, the electric heater and the fan are driven to promote drying of the pot body.

According to this aspect, the pot body can be dried in a state where the pot body made of pottery made in the pot is accommodated in the pot receiving recess. Thereby, the user can surely dry the pot body after use, which is easy to forget, and can maintain the product state of the pot body or improve the durability.

A thirteenth aspect of the present invention is the one described in any one of the first to twelfth aspects, wherein a sensor portion of a temperature sensor is arranged in the center of the bottom wall portion of the pot accommodating recess. On the other hand, a temperature detection plate constituting a part of the bottom surface and abutting the sensor portion is arranged on the bottom surface of the pot body, and the temperature detection plate is made of a material having a higher heat transfer rate than the ceramics.

According to this form, since the temperature detecting portion of the sensor portion of the crimped temperature sensor is made of a material having a higher heat transfer rate than that of pottery, the temperature in the pot body that is in contact with the inner surface of the temperature detecting plate is fast. The temperature is transmitted to the sensor part of the temperature sensor and detected by the sensor part crimped to the surface of the pottery, and the temperature in the pot body can be detected more accurately. In addition, the sensor portion of the temperature sensor is arranged in a state of being biased upward by an elastic member, thereby advantageously having a mechanism for detecting the presence or absence of a rice cooker. In addition, if the material of the temperature detection plate is a material having a higher heat transfer rate than that of pottery, it may be any one, and it is preferable to use a metal made of aluminum, an aluminum alloy, or carbon.

A fourteenth aspect of the present invention is the one described in the thirteenth aspect, wherein the temperature detecting plate is formed such that a diameter dimension of the outer surface side of the outer peripheral surface of the pot body is smaller than an inner periphery of the pot body. A stepped cylindrical shape on the inner surface side of the surface, and a receiving recess for accommodating the sensor portion is provided at a central portion of the outer surface of the temperature detecting plate.

According to this aspect, since the temperature detecting plate is formed in a cylindrical shape with a step, it can be reliably held by a stepped portion with respect to the bottom surface of the pot body, and the temperature detecting plate can be stably arranged on the bottom surface of the pot body. Furthermore, since a receiving recess is provided in a central portion of the outer surface, the sensor portion can be stably positioned and held. In addition, by accommodating a recess, the thickness of the portion of the portion contacting the sensor portion of the temperature detection plate portion can be reduced, and the temperature inside the pot body can be detected more reliably and quickly.

A fifteenth aspect of the present invention is the one described in the fourteenth aspect, wherein the step surface between the large-diameter portion and the small-diameter portion of the temperature detecting plate is set to decrease as it travels toward the inner peripheral side. The downward inclined surface, on the other hand, the peripheral wall portion of the accommodating recess has a tapered shape that expands outward in the diameter direction as it goes downward.

According to this aspect, since the stepped surface between the small-diameter portion and the large-diameter portion is a downwardly inclined surface, it is possible to eliminate local stress concentration in the locking portion of the bottom wall portion of the temperature detecting plate against the pot body. Furthermore, the accommodating recess is formed in a tapered shape that expands outward in the diameter direction toward the downward direction, so that the sensor portion can be accommodated while being aligned with the center, and the positioning of the temperature detection plate and the sensor portion can be performed more smoothly. . [Effect of the invention]

According to the present invention, a structure is adopted in which not only an electric heater is provided on the bottom wall portion of the pot accommodating recess of the rice cooker body, but also the electric body is directly heated by the electric heater. In this way, the slow temperature rise of the pot body when the pot body made of pottery is directly heated or the homogeneous heating when the temperature rises, and the high heat storage property after heating can be skillfully used to cook the rice deliciously. In addition, since the heat source uses an electric heater, the convenience of making an electric cooker such as cooking rice can be maintained as it is. Furthermore, the lid is exposed to the outside in the opening above the pot accommodating recess. In this way, the upward heat dissipation of a rice cooker made of a material with high heat storage stability can be ensured stably, and unnecessary rice burnt caused by the high heat storage property of the pot body can be prevented easily and conveniently. Wait. In addition, the opening at the upper end of the ventilation path is directly communicated with the outside in the upper opening in the pot accommodating recess. For the air supply path of this structure, the control unit drives the air supply fan in the step of cooking rice so that the outside air introduced from the opening at the lower end of the air supply path does not stay in the air supply path and is continuously discharged from the upper opening. . Therefore, in the first step in which the heat storage property of the pot body made of ceramics becomes a problem, only by driving the fan, the outside air can continuously pass through the air supply path, and the whole cooling of the pot body can be promoted.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

An electric cooker 10 according to an embodiment of the present invention is shown in FIGS. 1 to 4. The electric cooker 10 includes the following: a rice cooker 12 that contains rice or water as a to-be-cooked object, and a rice cooker body 16 that has a pot-receiving recess 14 that accommodates the rice-cooker 12 in a removable manner. In addition, in the following description, the above means the upper part in FIGS. 1 and 4, the lower part means the lower part in FIGS. 1 and 4, and the forward means the left part in FIGS. 1 and 2 and the so-called rear part. Refers to the right in Figures 1 to 2 and 4.

As shown in FIG. 4, the rice cooking pot 12 includes a pot body 18 made of earthenware, which contains rice or water as a to-be-cooked object, and a cover 22 which covers an opening portion 20 above the opening portion of the pot body 18. Both the pot body 18 and the lid body 22 are made of porous ceramics having a plurality of minute spaces with open surfaces. The pot body 18 includes a generally cylindrical peripheral wall portion 24 and an approximately circular plate-shaped bottom portion 26 which are integrally formed and have an enlarged diameter toward the upper opening portion 20, and have a substantially circular pan shape as a whole. In this embodiment, the wall thickness dimension of the peripheral wall portion 24 is gradually thickened from the bottom portion 26 toward the upper opening portion 20, and the wall thickness dimension of the upper end from the middle of the peripheral wall portion 24: t2 is greater than the wall thickness dimension of the bottom portion 26: t1. (T1 <t2). In addition, a flange portion 30 is provided on the upper edge portion 28 of the pot body 18 of the rice cooker 12 so as to protrude toward the outer peripheral side and have a substantially rectangular cross-sectional shape, and expand over the entire periphery of the outer peripheral side. . The bottom surface 32 of the flange portion 30 is provided with a downward slope that protrudes downward as it goes toward the outer peripheral side. That is, the above-mentioned downward slope is configured to be close to the bottom wall 112 of the annular groove portion 110 as described later. Furthermore, the upper surface 34 of the flange portion 30 also has a downward slope protruding downward as it goes toward the outer peripheral side. In addition, step surfaces 36 a and 36 b having a substantially L-shaped cross-sectional shape are provided on the inner peripheral side of the upper edge portion 28 of the pot body 18 over substantially the entire periphery. Here, the stepped surface 36b is formed below and inside the stepped surface 36a.

In addition, as shown in FIG. 4, a through hole 40 is formed in a central portion of the bottom portion 26 located on the bottom surface of the pot body 18 of the rice cooker 12. The temperature detection plate 38 is provided and has a temperature similar to that of the temperature detection plate 38. Section shape. Since the outer shape of the temperature detection plate 38 and the through-hole 40 have a substantially T-shaped cross-sectional shape, the temperature detection plate 38 can be stably held in the through-hole 40. In addition, the temperature detecting plate 38 not only constitutes a part of the bottom portion 26, but also contacts the sensor portion 76a of the rice cooker body 16 described later. The temperature detecting plate 38 is made of a material having a higher heat transfer rate than that of the pottery constituting the pot body 18 or the lid body 22, and the material is various metals or metal compounds, or carbon, alumina, or aluminum nitride. Thereby, compared with the case where the sensor part 76a of the temperature sensor 76 is crimped to the surface of the pottery, the temperature in the pot body 18 can be detected more accurately. Here, since the outer shape of the temperature detection plate 38 and the through hole 40 have a substantially T-shaped cross-sectional shape, the shape of the temperature detection plate 38 will be described in detail below as an example. The inner surface side of the bottom portion 26 of the inner surface of the pan body 18 drawn as the temperature detection plate 38 is a large-diameter portion 42. On the other hand, the outer surface side of the bottom portion 26 of the outer peripheral surface of the pot body 18 is made small. The diameter portion 44 has a substantially stepped cylindrical shape as a whole. In addition, the step surface 46 between the large-diameter portion 42 and the small-diameter portion 44 of the temperature detection plate 38 is a downwardly inclined surface that moves downward toward the inner peripheral side. The above shape is a T-shaped cross-sectional shape similar to the outer shape of the temperature detection plate 38 and the through hole 40. In addition, the temperature-receiving plate 38 is provided with a receiving recess 48, which is different from the through hole 40 and has a center portion on the outer surface opened downward to accommodate a sensor portion 76 a described later. Here, the inner surface 50 of the peripheral wall portion of the accommodating recess 48 has a tapered shape that expands outward in the diameter direction (left-right direction in FIG. 4) as it goes downward.

As described above, since the temperature detecting plate 38 is in the shape of a column with a step, the through hole 40 of a similar shape provided on the bottom portion 26 of the pot body 18 can be reliably held by the step portion, and the temperature detecting can be performed. The plate 38 is stably disposed on the bottom 26 of the pot body 18. Further, since the receiving recess 48 for receiving the sensor portion 76a is provided at the center portion of the outer surface, the sensor portion 76a can be stably positioned and held. In addition, by providing the accommodation recess 48, the plate thickness of the portion abutting the sensor portion 76a can be reduced, so that the temperature inside the pot body 18 can be detected more reliably. In addition, since the step surface 46 between the large-diameter portion 42 and the small-diameter portion 44 of the temperature detection plate 38 is a downward inclined surface, the locking portion of the temperature detection plate 38 on the bottom portion 26 of the pot body 18 can be eliminated. Local stress is concentrated, and in the manufacturing step, it is easy to flow the adhesive between the two, and the improvement of manufacturability can also be achieved. Furthermore, since the inner surface 50 of the peripheral wall portion of the accommodating recess 48 has a tapered shape that expands outward as it travels downward, the sensor portion 76a can be guided to be accommodated in the accommodating recess 48. The positioning of the temperature detecting plate 38 and the sensor portion 76a is performed smoothly.

On the other hand, as shown in FIG. 4, the lid body 22 of the rice cooking pot 12 includes an inner lid 52 and an outer lid 54. In this embodiment, they are all made of pottery similarly to the pot body 18. The inner cover 52 has a substantially circular plate shape that expands flatly as a whole, and a columnar handle 56 protruding upward is integrally formed at a central portion in the radial direction. In addition, the wall thickness dimension of the inner cover 52: t3 is greater than the wall thickness dimension of the bottom 26: t1 or the wall thickness dimension of the outer cover 54: t4, and is smaller than the wall thickness dimension of the upper end side from the middle of the peripheral wall portion 24: t2 (t1 ≒ t4 <t3 <t2). Furthermore, a flange-shaped locking piece 58 is formed integrally at the upper end portion of the outer peripheral edge portion of the inner cover 52 and extends to the outer peripheral side over substantially the entire periphery. In addition, a pressure relief hole for pressure relief (not shown) is formed in the inner cover 52 and penetrates the inner cover 52 in the wall thickness direction. In addition, a plurality of protrusions 60 protruding downward in a substantially dome shape are formed on the lower surface of the inner cover 52. The inner cover 52 having such a structure is shown in FIG. 4, and the holding piece 58 of the inner cover 52 is engaged with the stepped surface of the end edge portion 28 on the pot body 18 in a state of holding the handle 56. 36b so as to cover the opening portion 20 above the opening portion of the pot body 18. On the other hand, as shown in FIGS. 1 and 4, the outer cover 54 has a substantially spherical shell shape as a whole, and a substantially cylindrical handle 62 protruding upward is provided at a central portion in the diameter direction. In addition, as shown in FIG. 2, a pressure relief hole 64 is formed behind the handle 62 (right side in FIG. 2) and penetrates in a substantially circular cross-sectional shape. As shown in FIG. 4, the outer cover 54 has such a structure, and the outer peripheral edge portion of the outer cover 54 is locked on the stepped surface 36 a of the upper edge portion 28 of the pot body 18 by holding the handle 62. Therefore, it can be disposed above the inner cover 52 and form a steam storage space 66 between the inner cover 52 and the inner cover 52. In this way, the lid body 22 has a double lid structure of the inner lid 52 and the outer lid 54, and a steam storage space 66 is formed between the inner lid 52 and the outer lid 54, so that the pot during cooking can be stably maintained The pressurized state inside the body 18 may be heated. Furthermore, the inner lid 52 covers the upper opening portion 20 of the pot body 18 and expands flatly, and is thicker than the outer lid 54. Therefore, the pot body 18 during cooking can be more reliably held by the weight of the inner lid 52. Internal pressure can achieve good cooking.

As shown in FIG. 4, the rice cooker body 16 includes a pot accommodating recess 14. On the other hand, the pot accommodating recess 14 includes the following: a bottom wall portion 68 that is substantially circular in plan view; and a peripheral wall The portion 70 protrudes upward in a substantially spherical shell shape over the entire circumference from the outer peripheral edge portion of the bottom wall portion 68. A sheath heater 72 serving as an electric heater for heating the rice cooking pot 12 is provided on the bottom wall portion 68 of the pot accommodating recess 14, and in a through hole 74 penetrating the central portion of the sheath heater 72 A temperature sensor 76 is provided. Further, the rice cooker body 16 on the bottom 78 side of the rice cooker body 16 below the sheath heater 72 includes a fan 80 and a control unit 82 that controls the fan 80 and the sheath heater 72.

As shown in FIG. 4, the sheathed heater 72 has a structure in which a first sheathed heater 72 a and a second sheathed heater 72 b are held for a sheathed heater holding member 84 having a substantially dish shape as a whole. The sheathed heater holding member 84 is made of metal, and the upper surface side is formed in a shape substantially similar to that of the bottom portion 26 of the pot body 18. On the other hand, on the lower surface side, the first sheathed heater 72 a and The sheath heater accommodating hole 86 held by the second sheath heater 72b is opened downward, and is formed to extend in a substantially spiral shape in the circumferential direction. In more detail, the first sheath heater 72a is held on the bottom plate 84a of the substantially disc-shaped sheath heater holding member 84, and the second sheath heater 72b is held on the other hand. On a substantially circular-shaped bottom wall peripheral edge 84b of the sheathed heater holding member 84 having a substantially dish shape. As described next, the sheathed heater 72 constituting the electric heater includes the following: a first sheathed heater 72a having a substantially circular plate shape, and a center of the bottom portion 26 of the pot body 18; A second sheathed heater 72b having a shape is placed on the periphery of the bottom portion 26 of the pot body 18. The sheath heater 72 is fixed to a predetermined position in the rice cooker body 16 by a fixing mechanism (not shown). As a result, by controlling the power of the first sheath heater 72a and the second sheath heater 72b according to the rice cooking step, the temperature distribution of the pot body 18 during rice cooking can be advantageously adjusted.

As shown in FIG. 4, a through hole 74 is provided in a central portion of the sheath heater 72 constituting the bottom wall portion 68 of the pot accommodating recess 14, and a sensor of the temperature sensor 76 is provided in the through hole 74. The portion 76a is in a state biased upward by an elastic member (not shown) such as a compression coil spring, and is arranged to be expandable and contractible in the vertical direction. With this, it is also advantageous to have a mechanism for detecting the presence or absence of the rice cooker 12. The temperature sensor 76 has a known structure in which the front end surface is a sensor portion 76a, and the temperature of the detected object is detected by contacting the detected object in the sensor portion 76a. The temperature sensor 76 is connected to a temperature sensor support portion 90 provided below the temperature sensor 76. On the other hand, the temperature sensor support portion 90 is fixed to the rice cooker body by compressing a coil spring. 16 on. Furthermore, the temperature sensor 76 is arrange | positioned so that it may protrude upward from the upper opening part of the through-hole 74. Therefore, when the bottom portion 26 of the pot body 18 is placed on the sheath heater 72, the sensor portion 76a of the temperature sensor 76 is based on the biasing force of the compression coil spring, and The bottom surface of the temperature-receiving plate 38 in the central portion of the bottom portion 26 is crimped.

In addition, as shown in FIG. 4, the rice cooker body 16 on the bottom 78 side of the bottom heater 78 below the sheath heater 72 constituting the bottom wall portion 68 of the pot accommodating recess 14 is on the rear side (right in FIG. 4 On the other hand, a fan 80 is provided. On the other hand, a control unit 82 including a circuit board is provided on the front side (left side in FIG. 4). An air inlet 92a is formed in the bottom surface 78 of the rice cooker body 16 provided with the above-mentioned fan 80, and includes a plurality of substantially elongated through-holes extending substantially radially throughout the entire surface. A suction port 92b is formed on the bottom surface 78 of the rice cooker body 16 provided with the control unit 82, and includes a plurality of substantially long portions extending in a substantially front-to-rear direction (left-right direction in FIG. 3) over substantially the entire surface. Strip-shaped through holes (see Figures 3 and 4). The above-mentioned air inlets 92a and 92b can efficiently introduce outside air into the rice cooker body 16. In more detail, the air introduced from the air inlet 92a into the inside and outside of the rice cooker body 16 is conveyed upward, and the jacket heater 72 constituting the bottom wall portion 68 of the pot accommodating recess 14 is air-cooled and passed through The ventilation path 102 drawn between the pot accommodating recess 14 and the pot body 18 to be described later exhausts air upward. In addition, the air introduced into the rice cooker body 16 from the air inlet 92b is conveyed upward, and the control unit 82 and the sheath heater 72 are air-cooled, and are passed through the pot accommodating recess 14 and the pot body 18 to be described later. The air supply path 102 drawn in between is exhausted upward. Further, a substantially rectangular box-shaped synthetic resin outer cover 93 that is opened toward the control section 82 is disposed above the control section 82, which can advantageously realize: preventing water or the like from adhering to the control section 82 or blocking from the protection Heat of the heater 72. In addition, on the bottom surface 78 of the rice cooker main body 16, leg portions 94 (see FIGS. 3 and 4) protruding in a substantially solid truncated cone shape are provided at four locations separated in the circumferential direction.

On the other hand, as shown in FIG. 4, the peripheral wall portion 70 of the pot accommodating recess 14 is isolated from the outer peripheral portion 96 of the sheath heater 72 constituting the bottom wall portion 68 of the pot accommodating recess 14 to the outside. The position is formed in a substantially cylindrical shape with a diameter gradually increasing toward the upper side and protrudes upward. A rubber protrusion 98 is provided on the substantially central portion of the peripheral wall portion 70 in the up-down direction and is separated at equal intervals in the circumferential direction from the inner side of the pot accommodating recess 14. Furthermore, since the rubber cooking portion 98 is crimped to the outer peripheral surface of the peripheral wall portion 24 of the pot body 18 in a state where the cooking pot 12 is accommodated in the pot accommodation recess 14, the peripheral wall portion of the pot accommodation recess 14 is crimped. In a state where a gap of a predetermined size is formed between the 70 and the outer peripheral surface of the peripheral wall portion 24 of the pot body 18, the pot body 18 is accommodated in the pot accommodation recess 14. Through the above gap, an air supply path 102 is formed between the peripheral wall portion 70 of the pot accommodating recess 14 and the outer peripheral surface of the peripheral wall portion 24 of the pot body 18 in the circumferential direction and the vertical direction. In addition, the peripheral wall portion 70 is bordered by the rubber protrusion 98, and the upper side is referred to as the upper peripheral wall portion 70a, and the lower side is referred to as the lower peripheral wall portion 70b. Both the upper peripheral wall portion 70a and the lower peripheral wall portion 70b constituting the peripheral wall portion 70 are made of metal, and are formed separately.

In addition, as shown in FIG. 4, in a state where the rice cooking pot 12 is accommodated in the pot accommodation recess 14, the opening 104 at the upper end of the air supply passage 102 is directly connected to the outside through the opening 106 above the pot accommodation recess 14. On the other hand, the opening 108 at the lower end of the air supply path 102 communicates with the inside of the rice cooker body 16. In more detail, the air supply path 102 has a ring shape, and extends over the entire circumference between the peripheral wall portion 70 of the pot accommodating recess 14 and the outer peripheral surface of the peripheral wall portion 24 of the pot body 18. Furthermore, the opening 104 at the upper end of the air supply passage 102 is formed by an upper annular gap between the upper edge portion of the peripheral wall portion 70 of the pan accommodating recess 14 and the upper edge portion 28 of the pan body 18: α, and the other On the other hand, the opening 108 at the lower end of the air supply passage 102 is a lower annular gap between the peripheral wall portion 70 provided in the pot receiving recess 14 and the sheath heater 72 constituting the bottom wall portion 68 of the pot receiving recess 14: β. Thereby, the insertion of the outside air through the air supply path 102 is not hindered, and the insertion of the outside air more quickly and the cooling of the pot body 18 caused by it can be realized. Furthermore, the size of the gap between the upper peripheral wall portion 70 a of the pot accommodating recess 14 in the air passage 102 and the peripheral wall portion 24 of the pot body 18: γ is enlarged toward the upper opening portion 104. As a result, it is possible to more reliably prevent the outside air from staying in the air supply path 102, and to realize the rapid insertion of outside air, so that the pot body 18 can be quickly cooled.

In addition, on the side of the upper opening portion 106 of the pot accommodating recess 14 of the rice cooker body 16, an annular groove portion 110 that opens upward and extends over the entire circumference of the outer periphery of the upper peripheral wall portion 70a is connected to the upper peripheral wall. The portion 70a is provided on the outer peripheral side in a connected manner. The annular groove portion 110 has a substantially groove shape, and includes a bottom wall 112, an inner peripheral side wall 114a protruding upward from an end edge portion on the inner peripheral side of the bottom wall 112, and an outer peripheral side from the bottom wall 112. The edge portion protrudes upward from the outer peripheral side wall 114b. Further, the front end portion of the inner peripheral side wall 114a of the annular groove portion 110 is connected to the front end portion of the upper peripheral wall portion 70a, and the bottom wall 112 is located below the front end portion of the upper peripheral wall portion 70a. On the other hand, the front end portion of the outer peripheral side wall 114 b of the annular groove portion 110 is formed to protrude upward beyond the front end portion of the upper peripheral wall portion 70 a and is in a state where the rice cooking pot 12 is accommodated in the pot accommodation recess 14. It is located slightly below the outer peripheral edge portion of the upper surface 34 of the flange portion 30 of the pot body 18. In addition, in a state where the rice cooking pot 12 is accommodated in the pot accommodating recess 14, the outer peripheral end surface of the flange portion 30 provided on the upper edge portion 28 of the pot body 18 is located below the rice cooker body 16 provided thereunder. The annular groove portion 110 is directly above. With this, even when it leaks to the outside along the upper surface 34 of the flange portion 30 during boiling, etc., it can also be accommodated in the annular groove portion 110, so that cleaning after use can be easily performed. . In addition, the bottom surface 32 of the flange portion 30 is inclined downward toward the outer peripheral side to prevent boiling and the like from entering the pot receiving recess 14 side along the bottom surface 32 of the flange portion 30 in advance. In addition, the upper surface 34 of the flange portion 30 is also inclined downward toward the outer peripheral side, so that boiling and the like during cooking can be reliably accommodated in the annular groove along the upper surface 34 of the flange portion 30. Department 110. Furthermore, when the rice cooker 12 is set in the pot accommodating recess 14 of the rice cooker body 16, when the flange portion 30 of the pot body 18 is held with a finger, the bottom surface 32 of the flange portion 30 is used. Inclined downwards, the engagement of the fingers with the flange portion 30 is improved, and stable operability can be achieved. In addition, in the cutout portion 116 (see FIG. 1) formed by cutting the upper end portion of the peripheral wall portion 100 of the rice cooker body 16 in a substantially rectangular shape (see FIG. 1), although not shown, it is formed as a ring groove. The front end portion of the outer peripheral side wall 114b of the portion 110 is lower than the front end portion of the upper peripheral wall portion 70a. Thus, by inserting the fingers of both hands into the cutout portion 116, the rice cooking pot 12 can be accommodated in the pot accommodating recess 14, which advantageously reduces or even eliminates pinching the fingers between the rice cooking pot 12 and the rice cooker. Concerns between the bodies 16.

In addition, an operation panel 118 including, for example, a liquid crystal display or various touch panel-type operation switches is provided on the outer surface of the front side (left side in FIG. 4) of the peripheral wall portion 100 of the rice cooker body 16. A control unit 120 for the operation panel 118 is disposed inside the operation panel 118. In addition, a substantially rectangular box-shaped synthetic resin cover 122 is disposed behind the control unit 120 (right side in FIG. 4), which is opened toward the control unit 120, which can be advantageously implemented to prevent water and the like from interfering with the control unit. The 120 adheres or blocks heat from the sheathed heater 72.

As shown in FIG. 4, the electric cooker 10 constructed according to the above-mentioned embodiment is used in a state in which the rice cooking pot 12 is accommodated in the pot accommodation recess 14. In addition, in the above-mentioned state, in the opening portion 106 above the pot accommodating recess 14, substantially the entire upper edge portion 28 and the lid 22 of the pot body 18 are exposed to the outside.

The steps of cooking rice are shown in FIG. 5 and include a water absorption step, a temperature raising step, a cooking step, and a simmering step. First, a water absorption step is performed. The above-mentioned water absorption step is shown in FIG. 4. In the pot body 18 of the rice cooker 12 which is accommodated in the pot accommodating recess 14 of the rice cooker body 16, rice (not shown) as rice is cooked. Or water. Since the pot body 18 is made of ceramics with low thermal conductivity, it is difficult to raise the temperature, and temperature unevenness is liable to occur. Therefore, in this embodiment, in the water absorption step before the temperature increasing step, a preheating operation in which heating is performed in advance is performed. The preheating operation is as shown in FIG. 5. In the water absorption step, the control unit 82 uses two sheathed heaters 72 a and 72 b to heat for about 20 minutes at a power value of, for example, about 50%. Thereby, the pot body 18 is skillfully used for the time of the water absorption step, and the pot body 18 made of pottery, which requires time to heat, is started from the beginning of the heating step to achieve the desired temperature in the pot body 18. In addition, in the water absorption step in the preheating operation described above, the control unit 82 sets the blower fan 80 to an off (inactive) state.

After the water absorption step, a temperature increasing step is performed. In this temperature raising step, as shown in FIG. 5, the control unit 82 continues to perform the heating of the pan body 18 using the two sheath heaters 72 a and 72 b. The power value in the heating step of the sheathed heaters 72a and 72b is 20%, 10%, and 5 minutes in the heating (i) (see FIG. 5) at the beginning of the heating step, which is lower than that in the water absorption step. 50% of the power value of the heaters 72a and 72b. In this way, by temporarily reducing the power of the sheathed heaters 72a and 72b at the beginning of the heating step, the heat storage property of the pottery can be used to eliminate the temperature unevenness in the pot body 18, thereby making it the most suitable for cooking rice. Of the state. Furthermore, in the temperature rising step (ii) (see FIG. 5), by heating the power values of the sheath heaters 72 a and 72 b at, for example, 90% and 50% for 10 minutes, the temperature in the pot body 18 can be increased. To the temperature most suitable for cooking. In addition, in the above temperature increasing step, the control unit 82 also sets the blower fan 80 to the off (non-operational) state.

Then, after the heating step, a cooking step is performed. In the above-mentioned cooking step, as shown in FIG. 5, the control unit 82 performs the heating of the pan body 18 using only the first sheath heater 72 a. The power value in the cooking step of the first sheath heater 72a is set to, for example, 40% and 5 minutes in the cooking (i) (see FIG. 5) at the beginning of the cooking step. In the second half of the cooking step (ii), it is set to, for example, 20% and 5 minutes. In this way, in the cooking step, by using the heat storage property of the pot body 18 made of ceramics, only the first sheath heater 72a on the center of the bottom portion 26 of the pot body 18 can be used. Therefore, the heat storage property of the pot body 18 made of ceramics can be used to cook rice in a power-saving manner. In addition, in the cooking step described above, the control unit 82 also sets the blower fan 80 to the off (non-operational) state.

Finally, the ravioli step is performed after the cooking step. In the aforementioned step, as shown in FIG. 5, in step (i) (see FIG. 5) at the beginning of the step, the control unit 82 sets the power values of the two sheath heaters 72 a and 72 b to, for example, 0%. And about 15 minutes, and the fan 80 is driven. Thereby, the outside air introduced from the opening 108 at the lower end of the air passage 102 can be continuously discharged from the upper opening 104 without being trapped in the air passage 102, so that the whole cooling of the pot body 18 can be promoted. In addition, in part (ii) (refer to FIG. 5) of the second half of the step, the control unit 82 only sets the power value of the first sheath heater 72 a to, for example, about 10% and about 5 minutes, and sets the fan 80 Is off (not working). With the above, the whole process of cooking rice is completed, and it becomes a heat preservation step after that. In this way, the control unit 82 continuously drives the blower fan 80 so that the outside air continuously passes through the blower path 102, and the period (15 minutes) (i) at the beginning of the step of turning off the sheath heaters 72a and 72b (15 minutes) ) Over 70% of the entire period (15 minutes + 5 minutes) of the step. With this, the control unit 82 can turn off the sheath heaters 72a and 72b from the step (i) at the beginning of the step, and continuously introduce the outside air into the air supply path 102. . Therefore, the heat dissipation of the pot body 18 can be quickly performed while maintaining the temperature of the pot body 18 suitable for the step, and full and delicious rice can be cooked. In addition, as shown in FIG. 5, the control unit 82 does not drive the blower fan 80 in steps other than the 焖 step. Therefore, it is possible to prevent heat radiation from the pot body 18 made of ceramics caused by the air passing through the air passage 102. Advantageously, the heat storage property of the pot body 18 made of pottery is used to cook rice.

With the electric cooker 10 configured in accordance with the present invention described above, the sheath heater 72 provided on the bottom wall portion 68 of the pot accommodating recess 14 of the rice cooker body 16 directly heats the rice cooker 12锅 体 18。 The pot body 18. Therefore, like conventional stoves, by skillfully utilizing the slow temperature rise of the pot body 18 caused by direct heating of the pot body 18 made of ceramics, or the uniform heating during temperature rise, and the high heat storage property after heating, Rice can be cooked deliciously. In addition, since the sheath heater 72 is used, the convenience of the electric cooker 10 such as rice cooking reservation can also be maintained by the control unit 82 as it is.

Further, in a state where the cooking pot 12 is accommodated in the pot accommodation recess 14, substantially the entirety of the upper edge portion 28 and the lid 22 of the pot body 18 is exposed to the outside in the opening portion 106 above the pot accommodation recess 14. . This not only stably ensures the upward heat dissipation of the rice cooker 12 made of a material having high heat storage properties, but also can advantageously and simply prevent unnecessary rice scorch caused by the high heat storage properties. .

In addition, a ventilation path 102 extending in the circumferential direction and up and down direction is formed between the peripheral wall portion 70 of the pot accommodating recess 14 and the outer peripheral surface of the peripheral wall portion 24 of the pot body 18, and the upper end opening portion 104 of the ventilation path 102 is directly connected to the outside. On the other hand, the opening 108 at the lower end of the air supply path 102 communicates with the inside of the rice cooker body 16. Thereby, in the step in which the heat storage property of the pot body 18 made of ceramics becomes a problem, only by driving the blower fan 80, the outside air introduced from the opening 108 at the lower end of the blower passage 102 will not stay in the blower passage. 102, and is continuously discharged from the upper opening 104, so that the entire body of the pan body 18 can be cooled.

In the present embodiment, the control unit 82 has a drying mode. The above-mentioned drying step is performed in a state in which only the pot body 18 that does not contain rice, water, or the like that is to be cooked is accommodated in the pot accommodation recess 14 of the rice cooker body 16. More specifically, in the drying step, the sheath heater 72 and the blower fan 80 constituting the electric heater are driven by the control unit 82 to promote the drying of the pot body 18. With the above drying step, the pot body 18 can be surely dried after being easily forgotten. Therefore, the initial state of the pot body 18 can be maintained, and the durability of the pot body 18 can be maintained and improved.

As mentioned above, one embodiment of the present invention has been described, but it is merely an example, and the present invention is not to be interpreted in a limited manner by the specific description in the above embodiment.

For example, in the above embodiment, the lid 22 of the rice cooker 12 is made of pottery in the same way as the pot body 18, but the lid 22 does not have to be made of pottery. In addition to pottery, cast or Any material such as glass. On the other hand, in order to maintain high heat storage properties, the body density of the pot body made of ceramics measured by JIS A 1509 is set to 1.5 g / cm ³ to 2.3 g / cm ³ , and preferably 2.0 g / cm ³ to 2.1 g / cm ^{3. In} this embodiment, it is 2.05 g / cm ³ to 2.08 g / cm ³ . The water absorption rate of the pot body made of ceramics measured by JIS A 1509 is set to 6 to 12%, preferably 8 to 10%, and 9% in this embodiment. In the above embodiment, the electric heater is the sheathed heater 72, but the invention is not limited to this, and a known electric heater such as a ceramic heater or a carbon heater may be used.

Furthermore, in the above embodiment, in the second half of step (ii), only the power value of the first sheath heater 72a is set to, for example, 10% and about 5 minutes, and the fan 80 is turned off ( (Not working) status, but it is not limited to this. That is, in a state where not only the blower fan 80 is continuously driven, but the period in which the power values of the two sheath heaters 72a and 72b are zero is set to 70% or more of the entire period of the step, In the second half (ii), the blower fan 80 is not driven, and the two sheath heaters 72a and 72b are turned off to incorporate a step of removing excess water. Alternatively, as in step (i) of this embodiment, the continuous driving of the fan 80 and the state where the two sheath heaters 72a and 72b are turned off may be maintained during the entire period of the step.

In the above-mentioned embodiment, the example in which the electric heater was constituted by the first sheath heater 72a and the second sheath heater 72b was shown. However, by using a single electric heater, only the pot body 18 made of pottery is used. It is a matter of course that the form in which heat is stored and the forced cooling of the fan 80 is performed in the step 进行 to cook rice is also included in the present invention.

In the above embodiment, the second sheath heater 72b is turned off in the cooking step, and only the first sheath heater 72a is used. However, it may be changed to use the first sheath according to the cooked taste. At least one of the heater 72a and the second sheathed heater 72b. That is, in the cooking step, the first sheath heater 72a may be turned off and only the second sheath heater 72b may be used, or both of the first and second sheath heaters 72a and 72b may be used.

Other than that, they are not listed one by one, but the present invention can be implemented in the form of various changes, corrections, and improvements based on the knowledge of those skilled in the art. In addition, as long as this embodiment does not depart from the gist of the present invention, Of course, any one is included in the scope of the present invention.

10‧‧‧ Electric Cooker

12‧‧‧ rice cooker

14‧‧‧ pot receiving recess

16‧‧‧ rice cooker body

18‧‧‧pot body

20‧‧‧ upper opening (opening)

22‧‧‧ Cover

26‧‧‧ bottom (bottom)

28‧‧‧ upper edge

30‧‧‧ flange

32‧‧‧ underside

38‧‧‧Temperature plate

42‧‧‧large diameter section

44‧‧‧Small diameter section

46‧‧‧step difference surface

48‧‧‧ accommodation recess

50‧‧‧ inner surface

52‧‧‧Inner cover

66‧‧‧Steam storage space

68‧‧‧ bottom wall

70‧‧‧Zhou Bibei

72‧‧‧ sheathed heater (electric heater)

72a‧‧‧The first sheath heater

72b‧‧‧Second sheath heater

76‧‧‧Temperature sensor

76a‧‧‧Sensor Section

80‧‧‧ send fan

82‧‧‧Control Department

102‧‧‧Air Supply Road

104‧‧‧ Upper opening

106‧‧‧upper opening

108‧‧‧ lower opening

110‧‧‧ annular groove

112‧‧‧ bottom wall

FIG. 1 is an overall perspective view showing an electric cooker as an embodiment of the present invention. FIG. 2 is a plan view of the electric cooker shown in FIG. 1. FIG. FIG. 3 is a bottom view of the electric cooker shown in FIG. 1. FIG. 4 is an enlarged sectional view taken along the line IV-IV in FIG. 2. FIG. 5 is a diagram for explaining a step of cooking rice in the electric cooker according to this embodiment.

Claims (15)

An electric cooker includes: a rice cooking pot that accommodates an object to be cooked; a rice cooker body that has a pot accommodation recess that accommodates the rice cooker in a removable manner; and an electric heater that is disposed in the pot accommodation recess The bottom wall part here heats the rice cooker; a fan is provided in the body of the rice cooker; and a control part controls the electric heater and the fan; the electric cooker is characterized in that: The rice cooker is composed of a pot body made of pottery containing the object to be cooked and a cover body covering the opening of the pot body, and the rice cooker is housed in the pot accommodating recess of the rice cooker body. In the state, the lid body is exposed to the outside in the opening above the pot accommodating recess. On the other hand, a directional circle is formed between the peripheral wall portion of the pot accommodating recess and the pot body of the rice cooker. And the upper and lower openings are directly connected to the outside in the upper opening of the pot accommodating recess, and the lower opening of the upper and lower sides of the air passage is in communication with the above The rice cooker communicates with the body; the control unit drives the fan in the step of cooking rice, so that the outside air introduced from the lower opening of the air passage does not stay in the air passage, but from the upper opening Continuous discharge. The electric cooker according to claim 1, wherein the control unit continuously drives the air-supplying fan to pass outside air continuously through the air-supply path through a period of 70% or more of the entire period of the air-supply step from the beginning of the step. And turn off the electric heater. The electric cooker according to claim 1 or 2, wherein the control unit does not drive the fan in steps other than the step (i). The electric cooker according to claim 1 or 2, wherein the air supply path has a ring shape, and extends throughout the entire circumference between the peripheral wall portion of the pot accommodation recess and the pot body, and the upper end of the air supply path The opening portion is formed by an annular gap on the upper side between the upper edge portion of the peripheral wall portion and the upper edge portion of the pot body. On the other hand, the lower opening portion of the air supply path is provided on the peripheral wall portion. A lower annular gap is formed between the bottom wall portion and the bottom wall portion. The electric cooker according to claim 4, wherein a size of a gap between the peripheral wall portion and the pot body in the air supply path is increased toward the upper end opening portion. The electric cooker according to claim 1 or 2, wherein the annular groove portion opened at the upper side of the upper opening portion side of the rice cooker body is connected to the outer peripheral side of the peripheral wall portion, and the The bottom wall of the annular groove portion is provided below the front end portion of the peripheral wall portion; on the other hand, an upper end edge portion of the pot body of the rice cooker is provided with a flange portion that expands on the outer peripheral side, The flange portion is provided such that an outer peripheral end surface thereof is directly above the annular groove portion, and a bottom wall of the flange portion is provided with the bottom wall that is in contact with the annular groove portion as it goes toward the outer peripheral side. Approached below and tilted. The electric cooker according to claim 1 or 2, wherein the lid body of the rice cooker includes: an inner lid that covers the opening of the cooker body and expands flatly; and an outer lid that is provided on the inner lid And a vapor storage space is formed between the upper cover and the inner cover; and the wall thickness of the inner cover is larger than the wall thickness of the outer cover. The electric cooker according to claim 1 or 2, wherein the electric heater includes the following: a first sheathed heater placed on the center of the bottom of the pot body; and a second sheathed heater placed on Place the bottom periphery of the pot body. The electric cooker according to claim 8, wherein the control unit uses both the first sheathed heater and the second sheathed heater in a step of heating the rice, and on the other hand, the subsequent cooking In the curing step, at least one of the first sheath heater and the second sheath heater is used. The electric cooker according to claim 9, wherein only the first sheathed heater is used in the cooking step. The electric cooker according to claim 8, wherein the power value in the heating step of the first and second sheathed heaters is at the beginning of the heating step and is lower than the power value in the water absorption step. The electric cooker according to claim 1 or 2, wherein the control section includes a drying mode that drives the electric heater and the feed in a state where the pot body that does not contain the object to be cooked is accommodated in the pot accommodating recess. A fan promotes the drying of the pot body. The electric cooker according to claim 1 or 2, wherein a sensor portion of a temperature sensor is arranged in the center of the bottom wall portion of the pot accommodating recess, and on the other hand, a structure is arranged on the bottom surface of the pot body A part of the bottom surface abuts the temperature detecting plate of the sensor portion, and the temperature detecting plate is made of a material having a higher heat transfer rate than the ceramic material. The electric cooker according to claim 13, wherein the temperature detecting plate has a cylindrical shape with a step, and the diameter of the outer surface of the outer surface of the pot body is smaller than that of the inner surface of the pot body. An inner surface side; and a receiving recess for accommodating the sensor portion is provided at a central portion of the outer surface of the temperature detecting plate. The electric cooker according to claim 14, wherein the step surface between the large-diameter portion and the small-diameter portion of the temperature detection plate is a downwardly inclined surface that descends as it travels toward the inner peripheral side. The peripheral wall portion of the accommodating recess has a tapered shape that expands outward in the diameter direction as it goes downward.