JP2013017498A - Rice cooker - Google Patents

Abstract

An object of the present invention is to provide a rice cooker that is superb in taste because superheated steam reaches every corner of the pan.
A pan 2 that is detachably stored in a rice cooker body 1, a lid 3 that covers an upper opening 1d of the rice cooker body 1 so as to be openable and closable, and an inner lid 4 that covers an opening 2a of the pan 2. The pan bottom heating unit 8 for heating the pan 2, the steam heating means 6 for generating steam, the superheated steam generator 15 for heating the steam generated by the steam heating means 6, and the steam heating means 6 are superheated. A steam supply unit 16a that supplies steam to the steam generator 15 and a steam input unit 17a that is smaller in diameter than the steam supply unit 16a and that inputs superheated steam generated by the superheated steam generator 15 into the pan 2 are provided. A plurality of superheated steam charging holes 4c are provided below the steam charging part 17a of the inner lid 4, and the diameter of the steam charging part 17a is small. In the pot 2 from the superheated steam charging hole 4c Was charged into range, it is possible to improve the taste of the food.
[Selection] Figure 1

Description

  The present invention relates to a rice cooker, and more particularly to a rice cooker provided with an overheated steam generator.

  DESCRIPTION OF RELATED ART Conventionally, the thing of various structures is known as a rice cooker provided with this kind of superheated steam generator. For example, in the rice cooker disclosed in Patent Document 1, a heater is attached as a superheated steam generator around the steam pipe (steam path) arranged in the internal space of the lid. According to the rice cooker described in Patent Document 1, the steam pipe is heated by the heater to heat the steam passing through the steam pipe to generate superheated steam exceeding 100 ° C., which is provided on the heating plate and is a pan. Steam can be introduced into the pan through a steam hole for introducing steam.

Japanese Patent No. 4203995

  However, in the conventional rice cooker as described in Patent Document 1, the momentum of the superheated steam is weak, and when it is put into the pan, the superheated steam spreads before reaching the pan bottom, There was a problem of not reaching every corner of the pot.

  The present invention solves the above-mentioned conventional problem, and improves the taste of the cooked food by pouring vigorous superheated steam over the whole area of the cooked food in the pan through a plurality of superheated steam charging holes. It aims at providing the rice cooker which can be made.

  In order to solve the above-described conventional problems, the rice cooker of the present invention includes a rice cooker body having an open upper surface, a pan that is detachably stored in the rice cooker body, and an upper opening of the rice cooker body. A lid that can be freely opened and closed, an inner lid that covers the opening of the pan, a pan bottom heating unit that heats the pan, steam heating means for generating steam, and steam generated by the steam heating means A superheated steam generator, a steam supply unit that communicates with the steam heating means and supplies steam to the superheated steam generator, and a steam input for introducing superheated steam generated by the superheated steam generator into the pan A steam supply portion having a diameter smaller than that of the steam supply portion, and a plurality of superheated steam input holes provided below the steam input portion of the inner lid. The diameter of the steam inlet is smaller than the diameter of In, raise the discharge speed of superheated steam, the superheated steam with a momentum, superheated steam filling hole was put on the entire food in the pot through, food taste and can be improve.

  According to the rice cooker according to the present invention, by reducing the diameter of the steam input part from the diameter of the steam supply part, the discharge speed of the superheated steam is increased, and the steam momentum is increased so that the superheated steam reaches the bottom of the pan. By providing a plurality of superheated steam input holes in the inner lid below the steam input part, the superheated steam with a momentum is input to the whole area of the cooked food in the pan through the plurality of superheated steam input holes. And a rice cooker with improved taste can be provided.

Schematic cross-sectional view of the rice cooker in Embodiment 1 of the present invention Top view schematically showing a state in which a part of the lid of the rice cooker is cut away. The perspective view which shows the state in which the steam supply pipe and the superheated steam injection pipe were attached to the superheated steam generator of the rice cooker Schematic sectional view showing a state in which a steam supply pipe and a superheated steam input pipe are attached to the superheated steam generator The perspective view which shows the attachment structure of the same superheated steam generator (A) Schematic sectional view of the steam discharge part of the rice cooker, (b) Schematic sectional view showing another example of the steam discharge part (A) Schematic sectional view showing another example of the steam discharge part of the rice cooker, (b) Schematic sectional view showing another example of the steam discharge part

  1st invention is the rice cooker main body with which the upper surface opened, the pan accommodated in the said rice cooker main body so that attachment or detachment is possible, the lid | cover which covers the upper opening part of the said rice cooker main body openably, and opening of the said pan An inner lid covering the part, a pan bottom heating unit for heating the pan, a steam heating means for generating steam, a superheated steam generator for heating the steam generated by the steam heating means, and the steam heating means A steam supply unit for supplying steam to the superheated steam generator, and a steam input unit for introducing superheated steam generated by the superheated steam generator into the pan, the diameter of the steam supply unit In addition, the diameter of the steam inlet is made smaller, and a plurality of superheated steam inlets are provided below the steam inlet of the inner lid, and the diameter of the steam inlet is smaller than the diameter of the steam supply part. Therefore, the discharge rate of superheated steam is increased, With superheated steam of the overheating was put into the whole of the food in the pan through the steam filling hole, it is possible to improve the taste of the food.

  In the second invention, in particular, a convex portion is provided below the steam inlet portion of the first invention, and a plurality of superheated steam inlet holes are provided on the bottom and side surfaces of the convex portion. However, since it discharges | emits radially from a superheated steam injection hole, a heating steam can be injected | thrown-in to the whole region of the cooking food in a pan.

  In the third invention, in particular, a convex portion is provided below the steam inlet portion of the first invention, and a plurality of superheated steam inlet holes are provided on the side surface of the convex portion. After the space is filled with the superheated steam, the superheated steam can be slowly infiltrated into the entire cooked product.

  In the fourth invention, in particular, a convex portion is provided below the steam inlet portion of the first invention, and a plurality of superheated steam inlet holes are provided on the bottom surface of the convex portion. After superheated steam permeates to the lower part of the cooked product, the superheated steam can be slowly permeated from the superheated steam permeation portion to the entire cooked product.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the present embodiment.

(Embodiment 1)
The rice cooker in Embodiment 1 of this invention is demonstrated using FIGS. FIG. 1 is a schematic cross-sectional view of a rice cooker in the present embodiment, and FIG. 2 is a top view schematically showing a state in which a part of the lid of the rice cooker is cut out.

  As shown in FIG. 1, the rice cooker which concerns on this Embodiment is accommodated in the substantially bottomed cylindrical rice cooker main body 1 in which the pot accommodating part 1a was formed, and the pot accommodating part 1a, rice and water And a pan 2 in which the food is put. A lid 3 having a hollow structure capable of opening and closing the upper opening 1 d of the rice cooker body 1 is attached to the upper portion of the rice cooker body 1. A substantially disc-shaped inner lid (also referred to as a heating plate) 4 capable of sealing the opening 2a of the pan 2 is detachably attached to the inside of the lid 3 (the side covering the opening 2a of the pan 2).

  The pot storage part 1a of the rice cooker body 1 is composed of an upper frame 1b and a coil base 1c. The upper frame 1b has a cylindrical portion 1ba that is arranged so that a predetermined gap is provided with respect to the side wall of the stored pan 2, and an upper opening of the rice cooker body 1 that protrudes outward from the upper portion of the cylindrical portion 1ba. And a flange portion 1bb fitted to the inner peripheral portion of 1d.

  The flange portion 1bb is formed with a water tank storage portion 1bc for storing the water tank 5. The water tank 5 is a bottomed cylindrical container that holds water for generating steam. Steam heating means 6, which is an example of a water tank heating device for heating (induction heating) the water tank 5, is attached to the outer peripheral surface of the water tank housing 1 bc.

  Instead of the steam heating means 6, the water tank 5 may be heated by a heater. When the steam heating means 6 heats the water tank 5, the water in the water tank 5 boils and steam of about 100 ° C. is generated. In addition, an opening 1bd is provided in the side portion of the water tank storage portion 1bc. In the opening 1bd portion, a water tank temperature sensor 7 for measuring the temperature of the water tank 5 is disposed so as to be able to contact a side portion of the water tank 5 stored in the water tank storage portion 1bc.

  The coil base 1c is formed in a bottomed cylindrical shape corresponding to the shape of the lower portion of the pan 2, and the upper portion thereof is attached to the lower end portion of the cylindrical portion 1ba of the upper frame 1b. A pan bottom heating unit 8 which is an example of a pan heating device for heating (induction heating) the pan 2 is attached to the outer peripheral surface of the coil base 1c. The pan bottom heating unit 8 includes an in-bottom heating coil 8a and an out-bottom heating coil 8b. The bottom heating coil 8a is disposed so as to face the periphery of the center of the bottom of the pan 2 via the coil base 1c, and the outside bottom heating coil 8b is disposed at the corner of the bottom of the pan 2 via the coil base 1c. It arrange | positions so that it may oppose.

  An opening 1ca is provided in the central portion of the bottom of the coil base 1c. In the opening 1ca portion, a pan temperature sensor 9 which is an example of a pan temperature detection unit for measuring the temperature of the pan 2 is disposed so as to be able to contact the bottom of the pan 2 stored in the pan storage unit 1a. Yes. Since the temperature of the pan 2 is substantially the same as the temperature of the cooked rice in the pan 2, the pan temperature sensor 9 can detect the temperature of the cooked rice in the pan 2 by detecting the temperature of the pan 2. it can.

  The lid 3 includes an upper outer member 3 a and a lower outer member 3 b that constitute the outer shell of the lid 3. The lid 3 includes a hinge shaft 3A. The hinge shaft 3A is an opening / closing shaft of the lid 3, and both end portions of the hinge shaft 3A are rotatably held by the upper frame 1b of the rice cooker body 1.

  The lid 3 is provided with a through-hole 3c so as to penetrate the vicinity of the center in the thickness direction of the lid 3, and the steam cylinder 10 is detachably attached to the through-hole 3c. Steam escape holes 10 a and 10 b are provided on the upper and bottom walls of the steam cylinder 10 so that excess steam in the pot 2 can be discharged to the outside of the rice cooker body 1. An annular packing 11 is attached around the through hole 3 c on the inner lid 4 side of the lid 3. The packing 11 is provided so as to be in close contact with the periphery of the steam escape hole 4 a provided in the inner lid 4 when the inner lid 4 is attached to the lid 3.

  In addition, an inner lid temperature sensor 12, which is an example of an inner lid temperature detection unit that detects the temperature of the inner lid 4, is attached to the lid 3. An inner lid heating coil 13, which is an example of an inner lid heating device for induction heating the inner lid 4, is attached to the inner surface (inside the lid 3) of the lower outer member 3 b that becomes the bottom wall of the lid 3.

  The inner lid 4 is made of a magnetic metal such as stainless steel capable of induction heating, and an annular packing 14 is attached to the surface of the outer peripheral portion of the inner lid 4 on the pan 2 side. The packing 14 is provided so as to be in close contact with the flange portion 2b of the pan 2 when the lid 3 is in the closed state.

  In addition, a superheated steam generator 15 for introducing superheated steam exceeding 100 ° C. into the pot 2 is provided inside the lid 3. The mounting structure of the superheated steam generator 15 will be described in detail later. The superheated steam generator 15 is configured to be able to generate superheated steam by heating steam at about 100 ° C. generated in the water tank 5. A steam supply pipe 16 and a superheated steam input pipe 17 are connected to the superheated steam generator 15. In addition, the superheated steam generator 15 is in contact with a superheated steam temperature sensor 18 that is an example of a superheated steam temperature detection unit that detects the temperature of the superheated steam generated by the superheated steam generator 15.

  The steam supply pipe 16 is provided so as to communicate with the inside of the water tank 5 when the lid 3 is in the closed state, and to guide the steam generated in the water tank 5 to the superheated steam generator 15, and the steam supply unit 16 a I have. An annular packing 19 is attached to the end of the steam supply pipe 16 on the water tank 5 side. The packing 19 is provided in close contact with the flange portion 5a of the water tank 5 when the lid 3 is in the closed state.

  The superheated steam input pipe 17 communicates with the inside of the pan 2 through the superheated steam input hole 4c provided in the inner lid 4 when the lid 3 is in the closed state, and the superheated steam generated by the superheated steam generator 15 is stored in the pan 2. A steam charging part 17 a is provided at the end of the superheated steam charging pipe 17 on the inner lid 4 side.

  An annular connection packing 20 is attached to the end of the superheated steam input pipe 17 on the pan 2 side. The connection packing 20 is provided so as to be in close contact with the periphery of the superheated steam injection hole 4c of the inner lid 4 when the lid 3 is in the closed state. Here, the diameter of the steam input part 17a is made smaller than the diameter of the steam supply part 16a, and is the same diameter as the superheated steam input hole 4c or slightly larger.

  In the present embodiment, the diameter of the superheated steam charging hole 4c is 2.85 mm, the diameter of the steam charging part 17a is 5.0 mm, and the diameter of the steam supply part 16a is 6.9 mm. By setting it as such a dimensional relationship, the superheated steam of the speed of about 28 m / s can be thrown in in the pan 2, and superheated steam can be spread to every corner.

  Further, the superheated steam input pipe 17 is inclined at an input angle in order to supply the generated superheated steam to the center of the pan 2. Originally, in order to spread the superheated steam to every corner of the pan 2, it is better to put it in from the center of the pan as much as possible, but since there is a steam cylinder 10 in the center of the pan, it is difficult to throw it from directly above, Moreover, superheated steam will concentrate on one point by throwing in from right above, and will generate | occur | produce and dry rice.

  By making the charging angle of the superheated steam input pipe 17 oblique, it is possible to prevent the superheated steam from concentrating on one point, and to shorten the length of the superheated steam input pipe 17. Since cooling can be prevented, power consumption can be reduced.

  The lid 3 includes a display unit 21 including a liquid crystal display that displays various information such as a rice cooking course and rice cooking time, and a plurality of rice cooking courses such as a white rice course, a brown rice course, and a white rice (softer) course. The operation part 22 which is an example of the rice cooking course selection part which can select a specific rice cooking course is provided. The operation unit 22 includes a plurality of buttons (not shown) such as a rice cooking start button so that instructions for starting, canceling, or making a reservation for cooking can be given in addition to selecting a rice cooking course. The user can select a specific rice cooking course with the operation unit 22 while referring to the display content of the display unit 21 and instruct the start of rice cooking.

  A rice cooker control unit 23 is mounted inside the rice cooker body 1. The rice cooking control unit 23 includes a storage unit that stores a plurality of rice cooking sequences for cooking rice. Here, the “rice cooking sequence” mainly consists of four steps of preheating, temperature rising, boiling maintenance, and steaming. In performing each step in turn, the energizing time, heating temperature, heating time, and heating output in each step. This refers to the cooking procedure that is determined in advance.

  Each rice cooking sequence corresponds to one of a plurality of rice cooking courses. The rice cooking control unit 23 controls the driving of each unit and each device based on the rice cooking course selected by the operation unit 22 and the detected temperatures of the water tank temperature sensor 7, the pan temperature sensor 9, and the inner lid temperature sensor 12. And perform the rice cooking process. In addition, the rice cooking control unit 23 causes the superheated steam generator 15 to generate superheated steam based on the rice cooking course selected by the operation unit 22 and the detected temperature of the superheated steam temperature sensor 18.

  Next, the attachment structure and internal structure of the superheated steam generator 15 will be described in more detail with reference to FIGS.

  FIG. 3 is a perspective view showing a state in which a steam supply pipe and a superheated steam input pipe are attached to the superheated steam generator of the rice cooker, and FIG. 4 shows a steam supply pipe and a superheated steam input pipe in the superheated steam generator. FIG. 5 is a perspective view showing a mounting structure of the superheated steam generator. FIG.

  As shown in FIGS. 3 and 4, the superheated steam generator 15 is connected to the steam supply pipe 16 and the superheated steam input pipe 17 via heat insulating members 31 and 32 having elasticity such as rubber. With this configuration, heat generated in the superheated steam generator 15 is not transmitted to the steam supply pipe 16 and the superheated steam input pipe 17.

  The superheated steam generator 15 includes a cylindrical case 41 and a rod-shaped heater 42. The heater 42 is disposed in the case 41 coaxially with the central axis A1 of the case 41. The superheated steam generator 15 heats the steam supplied into the case 41 with the heater 42 to generate superheated steam.

  The heater 42 is provided so as to penetrate the one side wall 41 a of the case 41 so that the heat generating portion 42 B is disposed in the case 41, and the tip end portion 42 A is in contact (fitted) with the other side wall 41 b of the case 41. ing. The case 41 is provided with a steam intake port 41 c that takes in the steam supplied through the steam supply pipe 16 and a superheated steam discharge port 41 d that discharges the superheated steam to the superheated steam input pipe 17.

  The steam intake port 41 c and the superheated steam discharge port 41 d are disposed in the vicinity of the heat generating portion 42 </ b> B of the heater 42. More specifically, the steam intake port 41 c and the superheated steam discharge port 41 d are disposed so as to face the heat generating portion 42 </ b> B of the heater 42. Further, around the heat generating part 42B of the heater 42, fins 43 made of a metal plate or the like are spirally provided. Here, the diameter of the superheated steam discharge port 41d is equal to the diameter of the steam input part 17a or larger than the diameter of the steam input part 17a. The diameter of the steam intake port 41c is equal to or larger than the diameter of the superheated steam discharge port 41d.

  As shown in FIG. 5, an engaging claw 44 that is an example of an engaging portion is formed on the outer peripheral surface of the case 41. The engagement claw 44 is engaged with an engagement hole 33 a which is an example of an engaged portion provided in the fixing member 33. The fixing member 33 is a metal (preferably inorganic) plate-like member formed so as to cover substantially the entire case 41 in plan view.

  The fixing member 33 is fixed to a plurality of bosses 3d erected on the lower outer member 3b of the lid 3 by fastening members 34 such as screws. That is, the superheated steam generator 15 is attached to the lower outer member 3b of the lid 3 via the fixing member 33 so as not to directly contact the upper outer member 3a and the lower outer member 3b. Further, the superheated steam generator 15 is in contact with the fixing member 33 only by the engaging claw 44 and is suspended by the fixing member 33.

  According to the present embodiment, the superheated steam generator 15 and the steam supply pipe 16 and the superheated steam generator 15 and the superheated steam input pipe 17 are connected via the heat insulating members 31 and 32 having elasticity. The heat generated by the superheated steam generator 15 can be prevented from diffusing throughout the steam supply pipe 16 and the superheated steam input pipe 17.

  Further, since the superheated steam generator 15 is attached to the lower outer member 3b through the fixing member 33 so as not to directly contact the upper outer member 3a and the lower outer member 3b, the superheated steam generator 15 is generated. Part of the heat can be diffused by the fixing member 33 to reduce the amount of heat transferred to the lower outer member 3b. Therefore, the deformation of the upper and lower outer members 3a, 3b of the lid 3 can be suppressed, and the temperature of the superheated steam can be further increased (for example, 200 ° C. or higher).

  Moreover, according to this Embodiment, since the superheated steam generator 15 contacts with the fixing member 33 only by the engaging claw 44, the contact area of the fixing member 33 and the superheated steam generator 15 is reduced. be able to. Further, since the superheated steam generator 15 is suspended by the fixing member 33, heat can be diffused also from the outer peripheral surface of the case 41. Thereby, it is possible to suppress the temperature of the fixing member 33 from rising excessively, and to further suppress the deformation of the upper and lower outer members 3a and 3b of the lid 3.

  Further, according to the present embodiment, since the fixing member 33 is formed so as to cover substantially the entire case 41 in plan view, the heat generated by the superheated steam generator 15 is transmitted to the upper outer member 3a. The fixing member 33 can function as a shielding plate that suppresses the above. Thereby, even if it is during rice cooking, it can suppress that the upper outer member 3a which a user can touch becomes high temperature. Therefore, the risk of burns can be further suppressed.

  Further, according to the present embodiment, since the steam at 100 ° C. is generated by a device different from the superheated steam generator 15, the output of the heater 42 can be lowered, and the superheated steam generator A reduction in size of 15 can be realized. Moreover, since it is not necessary to supply water in the case 41 of the superheated steam generator 15, it is possible to suppress the adhesion of scale in the case 41 and the decrease in thermal efficiency.

  Here, the superheated steam temperature sensor 18 is installed in the root portion 42 a of the heater 42. By installing at the base portion 42a of the heater 42, the temperature difference with the heater 42 can be controlled to be small, and the steam temperature can be stably supplied at around 200 ° C.

  Further, according to the present embodiment, as shown in FIG. 4, the tip 42 </ b> A of the heater 42 is provided so as to contact the side wall 41 b of the case 41, so that the heat of the heater 42 is directly transmitted to the case 41. The steam in the case 41 can be efficiently heated from both the heater 42 and the inner surface of the case 41. Thereby, it is possible to further increase the temperature of the superheated steam and reduce the size of the apparatus.

  In addition, when the front-end | tip part 42A of the heater 42 and the side wall 41b of the case 41 are contacted, compared with the case where they are not contacted, the temperature of the case 41 can be raised about 70-80 degreeC, for example.

  Since the heater 42 and the case 41 have different shapes, the connection portion between the heater 42 and the case 41 may be broken due to expansion or contraction due to thermal stress when the heat is cooled. For this reason, it is preferable that the front end portion 42 </ b> A of the heater 42 is fitted or brought into contact with the side wall 41 b of the case 41 instead of being integrally fixed. Thereby, it can suppress that the connection part of the heater 42 and the case 41 breaks.

  Further, according to the present embodiment, since the steam intake port 41c is arranged in the vicinity of the heat generating part 42B of the heater 42, the temperature difference between the steam taken in from the steam intake port 41c and the heat generating part 42B is increased. Heat exchange is efficiently performed by being large. Thereby, the temperature of steam can be raised rapidly and the heating efficiency of steam can be improved. In addition, the heater 42 can be downsized.

  Further, according to the present embodiment, since the fins 43 are provided spirally around the heater 42, the steam can be moved spirally along the fins 43 to lengthen the steam movement path. . Further, since the steam is also heated from the fins 43 to which the heat of the heater 42 is transmitted, the contact area between the steam and the heat source (the heaters 42 and the fins 43) increases. Therefore, the heat of the heater 42 can be efficiently applied to the steam, and the steam heating efficiency can be further improved. In addition, the heater 42 can be downsized.

  When the case 41 and the fins 43 are configured to come into contact with each other, dimensional variation is likely to occur particularly in the contact portion between the case 41 and the fins 43 during mass production. In this case, the temperature of the superheated steam discharged from the superheated steam discharge port 41d varies. For this reason, it is preferable that the case 41 and the fin 43 are non-contact. However, if the gap between the case 41 and the fins 43 is increased, the amount of steam that flows through the gaps without flowing along the fins 43 increases, and the steam heating efficiency decreases. For this reason, it is preferable to make the gap between the case 41 and the fin 43 as small as possible (for example, 1.5 mm or less).

  Moreover, when components such as calcium chloride and magnesium chloride are included in the vapor, if those components adhere to and accumulate on the case 41 and the fins 43, the vapor hardly flows (or does not flow). For this reason, as materials for the fins 43 and the case 41 that are in contact with the steam, it is preferable to select an all-stenitic high corrosion-resistant material so that oxidation, corrosion, stress corrosion cracking, and the like due to steam do not occur.

  Further, when superheated steam is generated in the case 41, the inside of the case 41 becomes a high pressure (about 1.02 atm). For this reason, it is preferable that the member for sealing each connection portion such as the connection portion between the case 41 and the heater 42 is brazed using nickel wax or the like instead of a commonly used rubber member such as silicon or fluorine.

  The shape of the superheated steam temperature sensor 18 is configured to contact the root of the heater 42 with a line.

  In addition, this invention is not limited to the said embodiment, It can implement in another various aspect. For example, in the above description, the steam supplied to the superheated steam generator 15 is generated by heating the water in the water tank 5, but the present invention is not limited to this. For example, steam generated in the pan 2 during rice cooking may be supplied to the superheated steam generator 15.

  In the above description, the air layer is formed between the case 41 and the lower outer member 3b, but the present invention is not limited to this. For example, a sheet-like (preferably inorganic physical) heat insulating member (not shown) having a lower thermal conductivity than air, for example, a silica heat insulating member, may be provided between the case 41 and the lower shell member 3b. .

  Moreover, you may provide a sheet-like heat insulation member (not shown) so that the case 41 and the whole fixing member 33 may be covered. In this case, since the heat insulating member is disposed between the case 41 and the upper outer member 3a and between the case 41 and the lower outer member 3b, deformation of the upper outer member 3a and the lower outer member 3b can be further suppressed. Therefore, the temperature of the superheated steam can be further increased. Moreover, since the superheated steam generator 15 is suspended by the fixing member 33, the heat insulation member does not apply the own weight of the superheated steam generator 15. Therefore, the heat insulating member is not compressed by the dead weight of the superheated steam generator 15 and the heat insulating performance does not deteriorate.

  In the above description, the fixing member 33 is disposed only between the upper outer member 3a and the lower outer member 3b. However, the present invention is not limited to this. For example, you may comprise the fixing member 33 so that it may have a substantially cylindrical part which covers the outer peripheral surface of the superheated steam generator 15. FIG. In this case, since a part of the heat transmitted from the superheated steam generator 15 to the upper outer member 3a and the lower outer member 3b can be shielded by the substantially cylindrical portion, the upper outer member 3a and the lower outer member 3b Deformation and the like can be further suppressed.

  In the above description, the fixing member 33 is formed so as to follow the shape of the case 41 for miniaturization. However, the present invention is not limited to this. For example, the fixing member 33 may be flat.

  Here, as shown in FIG. 6 which is a schematic sectional view of the steam discharge section, the steam input section 17a of the superheated steam input pipe 17 has a smaller diameter than the steam supply section 16a of the steam supply pipe 16, The packing 20 communicates with the steam connection portion 20a. The diameter of the steam connection part 20a is equal to or smaller than the diameter of the steam input part 17a.

  A convex portion 4b protruding in the inner direction of the pan 2 is provided below the steam charging portion 17a of the inner lid 4, and a plurality of superheated steam charging holes 4c are provided in the convex portion 4b.

  The convex part 4b is formed in a substantially circular shape. With this configuration, vigorous superheated steam can be thrown into the entire area of the cooked food in the pan 2 through the superheated steam throwing hole 4c.

  In particular, as shown in FIG. 6A, when the superheated steam charging hole 4c is provided in each of the side surface and the bottom surface of the convex portion 4b of the inner lid 4, the food in the pot 2 is radiated from the superheated steam charging hole 4c. Superheated steam can be thrown in a wide range.

  Moreover, as shown in FIG.6 (b), when the superheated steam injection hole 4c was provided only in the side part of the convex part 4b of the inner cover 4, the space of the food and the inner cover 4 was once filled with superheated steam. Later, superheated steam can be slowly infiltrated throughout the cooked product.

  Further, as shown in FIG. 7 (a), when the superheated steam charging hole 4c is provided only at the bottom of the convex portion 4b of the inner lid 4, the superheated steam permeates once below the cooked food just below the superheated steam charging hole 4c. Then, the superheated steam can be slowly permeated from the superheated steam permeation portion to the entire cooked product.

  Further, as shown in FIG. 7B, the inner lid 4 is locally recessed with respect to the inner direction of the pan 2 so that the gap between the steam input portion 17a and the facing portion of the inner lid 4 is 0 to 1 mm. If it forms so that it may become 4d, the space of the vapor | steam injection | throwing-in part 17a, the inner cover 4, and the connection packing 20 can be decreased, and it can suppress that a speed falls by superheated steam swirling in space.

  The position of the superheated steam charging hole 4c, the formation angles of the convex portions 4b and the concave portions 4d of the inner lid 4, etc. may be changed flexibly according to the desired taste.

  The bend R of the steam supply pipe 16 through which the superheated steam passes and the superheated steam input pipe 17 are made as large as possible. (In this embodiment, R15 or higher.)

  As a result, it is possible to improve the squeezability and the durability such as wear due to the contact with steam.

  Since the rice cooker concerning this invention can supply superheated steam to every corner in a pan, it is useful as a household rice cooker for business use or a business.

DESCRIPTION OF SYMBOLS 1 Rice cooker body 1a Pan storage part 2 Pan 3 Lid 3A Hinge shaft 4 Inner lid (heating plate)
4a, 10a, 10b Steam escape hole 4b Convex part 4c Superheated steam injection hole 4d Concave part 5 Water tank 6 Steam heating means (water tank heating device)
7 Water tank temperature sensor 8 Pan bottom heating unit (pan heating device)
9 Pan temperature sensor (pan temperature detector)
10 Steam cylinder 11, 14, 19 Packing 12 Inner lid temperature sensor (inner lid temperature detector)
13 Inner lid heating coil (Inner lid heating device)
DESCRIPTION OF SYMBOLS 15 Superheated steam generator 16 Steam supply pipe 16a Steam supply part 17 Superheated steam injection pipe 17a Steam injection part 18 Superheated steam temperature sensor (superheated steam temperature detection part)
DESCRIPTION OF SYMBOLS 20 Connection packing 20a Steam connection part 21 Display part 22 Operation part 23 Rice cooking control part 31, 32 Heat insulation member 33 Fixing member 33a Engagement hole (engaged part)
34 Fastening member 41 Case 41a, 41b Side wall 41c Steam intake port 41d Superheated steam discharge port 42 Heater 42a Root part 42A Tip part 42B Heat generating part 43 Fin 44 Engaging claw (engaging part)

Claims (4)

A rice cooker body having an open top surface, a pan that is detachably stored in the rice cooker body, a lid that covers the upper opening of the rice cooker body so as to be openable and closable, and an inner lid that covers the opening of the pan A pan bottom heating unit for heating the pan, steam heating means for generating steam, a superheated steam generator for heating the steam generated by the steam heating means, and the superheated steam generation in communication with the steam heating means A steam supply section for supplying steam to the apparatus, and a steam input section for introducing the superheated steam generated by the superheated steam generator into the pan, the steam supply section of which is more than the diameter of the steam supply section A rice cooker having a reduced diameter and a plurality of superheated steam inlets provided below the steam inlet of the inner lid. The rice cooker according to claim 1, wherein a convex portion is provided below the steam charging portion, and a plurality of superheated steam charging holes are provided on a bottom surface and a side surface of the convex portion. The rice cooker according to claim 1, wherein a convex portion is provided below the steam charging portion, and a plurality of superheated steam charging holes are provided on a side surface of the convex portion. The rice cooker according to claim 1, wherein a convex portion is provided below the steam charging portion, and a plurality of superheated steam charging holes are provided on a bottom surface of the convex portion.

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