JP2007236519A - Rice cooker - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rice cooker which effectively re-heats cooked rice during warming without making the cooked rice dry, and at the same time, reduces the warming smell of the cooked rice. <P>SOLUTION: This rice cooker includes a pot 14, a pot heating means 15, a lid body 17, a lid heating plate 20 which heats the inside of the pot, a lid heating means 23 which heats the lid heating plate 20, a water container 19 which stores water, and a water feeding means 25 which feeds water from the water container to the lid heating plate. The lid heating plate 20 is provided with a steam generating section 20a which forms water into steam, and a steam inputting port 20b which inputs the formed steam into the pot. At the time of re-heating of cooked rice during warming, water is fed from the water container 19 to the steam generating section 20a, and the lid heating means 23 is operated. Thus, at the time of re-heating of the cooked rice during warming, a required proper amount of steam can be input into the pot, and the re-heating can be performed without making the cooked rice dry. At the same time, air containing a warming odor in the pot is discharged outside by the steam being input, and the warming odor in the pot is reduced. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a rice cooker for reheating cooked rice.

Conventionally, the rice cooker which reheats the heat-retaining rice and suppresses a fall in taste is well known (for example, refer patent document 1).
Japanese Patent Application Laid-Open No. 08-228921

  However, in the conventional configuration, when the user operates the switch to instruct reheating, the heating means heats the pan, but since only heat is added to the rice, the moisture contained in the rice is reduced. It had the problem of evaporating and drying the rice.

  This invention solves the said conventional subject, and it aims at providing the rice cooker which reduces the heat retention odor of rice while effectively reheating the rice during heat retention, without drying.

  In order to solve the conventional problems, the rice cooker of the present invention includes a pan, a pan heating means for heating the pan, a lid for covering the opening of the pan, and a lid heating plate for heating the inside of the pan from above. And a lid heating means for heating the lid heating plate, a water container for storing water to be supplied to the lid heating plate, and a water supply means for supplying water from the water container to the lid heating plate. A steam generation part that stores water supplied from the container and generates this water into steam, and a steam inlet for introducing steam generated through communication between the steam generation part and the pot into the pot, At the time of reheating, water is supplied from the water container to the steam generating part of the lid heating plate to operate the lid heating means.

  As a result, when reheating the cooked rice, the necessary amount of steam can be put into the pan, and the rice can be reheated without drying, and at the same time air containing the warming odor in the pan. Is expelled by the introduced steam, and the warming odor in the pan is reduced.

  The rice cooker of the present invention can be reheated without drying the rice during reheating of the heat-retaining rice, and at the same time, the heat retaining odor in the pan is reduced.

  1st invention is a pan, the pan heating means which heats this pan, the cover body which covers the opening part of a pan, the lid heating plate which heats the inside of a pan from upper direction, and the lid heating means which heats a lid heating plate And a water container for storing water to be supplied to the lid heating plate, and a water supply means for supplying water from the water container to the lid heating plate, wherein the lid heating plate stores water supplied from the water vessel and stores the water. A steam generating unit that generates steam, and a steam inlet for introducing steam generated through the steam generating unit and the pan into the pan are provided. By using a rice cooker that feeds water to the steam generator and operates the lid heating means, it is possible to put an appropriate amount of steam into the pan when reheating the cooked rice. It can be reheated without being dried, and at the same time, it is driven out by the steam that is filled with air containing the warming odor in the pan , Warm smell of the pot is reduced.

  According to a second invention, in the first invention, a lid temperature detecting means for detecting the temperature of the lid heating plate heated by the lid heating means is provided, and the output of the lid temperature detecting means is used when reheating the cooked rice. By controlling the lid heating means based on this, the air containing the warming odor generated by the temperature rise of the rice can be effectively expelled, and the warming odor in the pan is further reduced.

  According to a third invention, in the first or second invention, the water container is detachably provided on the upper surface of the lid body, so that water can be put in the water container without the user opening the lid body at the time of reheating. It can be confirmed that it is contained, and when water is not contained, water can be put into a water container, which is convenient for the user.

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

(Embodiment 1)
FIG. 1 shows a rice cooker according to Embodiment 1 of the present invention.

  As shown in the figure, an upper frame 12 is fitted into an opening of a substantially cylindrical body 11 whose upper surface is open. Inside the body 11, the upper frame 12 and the coil base 13 form a storage portion for the pan 14. The coil base 13 is formed in a bottomed cylindrical shape, and the upper end portion of the coil base 13 is fixed to the upper frame 12. The coil base 13 is provided with a pot heating means 15 which is a bottom induction coil for induction heating of the pot 14 and heats the pot 14 by induction heating.

  A bottom sensor 16 for detecting the temperature of the pan 14 is energized and attached to the bottom of the pan 14 to detect the temperature of the pot during cooking and warming so that the food in the pan 14 is in an optimum temperature state. ing.

  The lid 17 is pivotally supported by a hinge shaft 18 provided at the rear of the upper frame 12 and covers the opening of the pan 14. The upper surface of the lid body 17 is formed by an outer lid 17 a made of synthetic resin, and the lower surface is constituted by an outer lid cover 22. A water container 19 for storing water to be supplied to the lid heating plate 20 is detachably attached to the lid body 17.

  The lid heating plate 20 is detachably attached to the outer lid cover 22 of the lid body 17. A pot packing 21 for sealing with the pot 14 is provided on the outer periphery of the lid heating plate 20.

  On the upper surface of the outer lid cover 22, a lid heating means 23 for heating the lid heating plate 20 is provided. The lid heating means 23 is formed by a lid induction coil for induction heating the lid heating plate 20, and the lid heating means 23 is controlled by the control means 26.

  The water supply means 25 composed of a liquid rolling pump supplies water in the water container 19 to the lid heating plate 20 and is controlled by the control means 26.

  The lid heating plate 20 is formed by press molding of magnetic stainless steel, and has a recess formed to store water supplied by the water supply means 25 from the water container 19 at a position opposite to the lid heating means 23 to generate steam. A steam generator 20a and a steam inlet 20b for introducing the generated steam into the pan 14 are provided.

  The control unit 26 includes a microcomputer mounted on a circuit board (not shown). The control means 26 is an operation of the water supply means 25 by a reheating program stored in the microcomputer in advance based on an operation command inputted by the user via the operation panel 30 and a signal inputted from the bottom sensor 16 by software. Control and heating control of the pan 14 and the lid heating plate 20 are performed. That is, when reheating the cooked rice, water is supplied from the water container 19 to the steam generator 20a of the lid heating plate 20 to operate the lid heating means 23. This control means 26 controls the heating amount of the pan heating means 15 and the lid heating means 23 by the energization rate.

  Further, the steam generation part 20a of the lid heating plate 20, the outer packing 27 that seals the steam generated between the steam inlet 20b and the outer lid cover 22, and the steam generation of the lid heating plate 20 similarly. Between the lid heating plate 20 and the outer lid cover 22, there is provided an inner packing 28 that seals the generated steam interposed between the portion 20 a, the steam inlet 20 b and the outer lid cover 22.

  Further, a steam port 29 is provided at a substantially central portion of the lid heating plate 20 to communicate with the outside air of the pan 14 and the lid body 17 and to release the steam in the pan 14 to the outside.

  About the rice cooker comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

  When the user prepares rice and water in the pan 14, prepares a predetermined amount of water in the water container 19, sets it in the rice cooker, turns on the rice cooker, and presses the rice cooking start button (not shown), The rice cooking process is started, and heating by the pan heating means 15 is performed according to a predetermined program. When cooked rice is finished, the user is notified of the end of cooked rice, and the process proceeds to a cooked rice warming process.

  At the time of heat insulation, the pot heating means 15 is controlled by the output of the bottom sensor 16 to heat the bottom and lower side of the pot 14, and the lid heating means 23 is controlled to heat the lid heating plate 20 to dry the rice. In addition, the temperature of the rice in the pan 14 is kept at about 73 ° C. so that a large amount of dew does not adhere.

  When the user operates a reheating switch (not shown) on the operation panel 30 during the heat insulation, the control unit 26 supplies the water in the water container 19 to the steam generation unit 20 a of the lid heating plate 20 by the water supply unit 25.

  Subsequently, the control means 26 heats the pot 14 by the pot heating means 15 and heats the rice kept in the pot 14. At this time, the heating rate of the pan heating means 15 is heated at an energization rate of 6 seconds ON and 11 seconds OFF, so that the temperature of the rice in the pot 14 is small and the temperature of the rice can be raised.

  At the same time that the temperature of the rice is raised, the lid heating plate 20 is heated by the lid heating means 23 to heat the water supplied to the steam generating unit 20a. The lid heating means 23 is heated at an energization rate of 5 seconds ON and 11 seconds OFF.

  When the bottom sensor 16 detects that the temperature of the rice has risen to a predetermined temperature (about 90 ° C.), the heating of the pan 14 by the pan heating means 15 is stopped, the energization rate of the lid heating means 23 is increased, and the steam Water in the generator 20a is evaporated, and steam is introduced into the pan 14 from the steam inlet 20b.

  Since the liquid rolling pump as the water supply means 25 has a substantially constant water supply amount per unit time, the operation time of the water supply means 25 is controlled by the control means 26 to supply an appropriate amount of water to the steam generating unit 20a. Is something that can be done.

  As described above, in the present embodiment, when reheating the cooked rice, an appropriate amount of steam can be introduced into the pan, and the rice can be reheated without drying, Air containing the warming odor in the pot that becomes stronger as the heat retention time becomes longer is expelled by the introduced steam, and the warming odor in the pot is reduced.

(Embodiment 2)
FIG. 2 shows a rice cooker according to Embodiment 2 of the present invention. The same elements as those of the first embodiment are denoted by the same reference numerals, description thereof is omitted, and differences will be mainly described.

  As shown in the figure, in the rice cooker of the present embodiment, a lid temperature detecting means 24 for detecting the temperature of the lid heating plate 20 is provided in contact with the lid heating plate 20, and the lid heating means 23 is provided with a lid temperature detection. Control is based on the detected temperature of the means 24.

  The control means 26 supplies water by a reheating program stored in advance in a microcomputer based on an operation command input by the user via the operation panel 30, a signal input from the bottom sensor 16 and the lid temperature detection means 24. Operation control of the means 25 and heating control of the pan 14 and the lid heating plate 20 are performed.

  About the rice cooker comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

  When the user prepares rice and water in the pan 14, prepares a predetermined amount of water in the water container 19, sets it in the rice cooker, turns on the rice cooker, and presses the rice cooking start button (not shown), A rice cooking process is started and it transfers to a heat retention process. The process up to this point is the same as in the first embodiment.

  Here, when the user operates a reheating switch (not shown) on the operation panel 30 during the heat insulation, the control means 26 causes the water supply means 25 to supply the water in the water container 19 to the steam generating portion 20a of the lid heating plate 20. Supply water.

  Subsequently, the control means 26 heats the pot 14 by the pot heating means 15 to heat the rice kept in the pot 14. At this time, the heating rate of the pan heating means 15 is heated at an energization rate of 6 seconds ON and 11 seconds OFF, so that the temperature of the rice in the pot 14 is small and the temperature of the rice can be raised.

  At the same time that the temperature of the rice is raised, the lid heating plate 20 is heated by the lid heating means 23 to heat the water supplied to the steam generating unit 20a. The energization rate of the lid heating means 23 is heated at an energization rate of 5 seconds ON and 11 seconds OFF, and the lid heating means 23 is controlled by the lid temperature detection means 24 so as to be about 90 ° C. at which no steam is generated.

  When the bottom sensor 16 detects that the temperature of the rice has risen to a predetermined temperature (about 90 ° C.), the heating of the pan 14 by the pan heating means 15 is stopped, the energization rate of the lid heating means 23 is increased, and the steam Water in the generator 20a is evaporated, and steam is introduced into the pan 14 from the steam inlet 20b.

  As described above, in the present embodiment, in the reheating process, in addition to the heating of the lid heating plate 20 by the lid heating means 23 when the pot 14 is heated by the pot heating means 15, steam is introduced into the pot 14. By this, the air containing the heat retaining odor in the pan 14 before charging is discharged from the steam port 29, and the heat retaining odor can be reduced.

  As described above, in the present embodiment, when reheating the cooked rice, an appropriate amount of steam can be introduced into the pan, and the rice can be reheated without drying, The air containing the hot odor in the pan is driven out by the introduced steam, and the hot odor in the pan is reduced. Further, the lid heating plate 20 is heated based on the output of the lid temperature detecting means 24, and the temperature of the rice is raised by heating the pot 14 by the pot heating means 15, and then the water supplied to the steam generating unit 20a is generated as steam. And since it puts in the pot 14, the air containing the heat retention odor which generate | occur | produced by the temperature rise of rice can be expelled effectively, and the heat retention odor in a pot can further be reduced.

(Embodiment 3)
Next, Embodiment 3 of the present invention will be described with reference to FIGS.

  In the rice cooker of the present embodiment, the water container 19 is detachably provided at an easily visible position at the center of the upper surface of the lid body 17.

  About the rice cooker comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

  When a user puts rice to be cooked and water corresponding to the amount of rice into the pan 14, and then puts a predetermined amount of water into the water container 19 and operates a rice cooking start switch (not shown), A process is performed. So far, this is the same as in the first and second embodiments.

  When the user operates the reheating switch (not shown) on the operation panel 30 during the heat insulation, if the user forgets to add water to the water container 19 or if the user puts less water than the predetermined amount, The user can supply water to the water container 19 without opening the lid 17.

  The operation and action after the user replenishes water are the same as in the first and second embodiments.

  As described above, in the present embodiment, even when the user forgets to put water in the water container 19, the user can replenish the water container 19 without opening the lid 17. A good rice cooker can be provided.

  If the water container 19 is formed of a transparent member, the presence or absence of water in the water container 19 can be easily determined. Moreover, if the water container 19 is provided with a float, the amount of water can be understood by the user, so that it is possible to provide a rice cooker that is even easier to use.

  As described above, the rice cooker according to the present invention can prevent the drying of the rice at the time of reheating during the heat retention, and can effectively reduce the heat retention odor, so that it can be applied to the storage of foods other than the rice by heat. .

Sectional drawing of the rice cooker in Embodiment 1 of this invention. Sectional drawing of the rice cooker in Embodiment 2 of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 14 Pan 15 Pan heating means 17 Lid body 19 Water container 20 Lid heating plate 20a Steam generation part 20b Steam inlet 23 Lid heating means 24 Lid temperature detection means 25 Water supply means 26 Control means

Claims (3)

A pan, a pan heating means for heating the pan, a lid covering the opening of the pan, a lid heating plate for heating the inside of the pan from above, a lid heating means for heating the lid heating plate, and a lid heating plate A water container for storing water to be supplied and water supply means for supplying water from the water container to the lid heating plate, wherein the lid heating plate stores the water supplied from the water container and generates steam to generate the water into steam. And a steam inlet through which steam generated by communicating the steam generating part and the inside of the pan is put into the pan, and water is supplied from the water container to the steam generating part of the lid heating plate when reheating the cooked rice. Rice cooker that operates the lid heating means. The lid temperature detecting means for detecting the temperature of the lid heating plate heated by the lid heating means is provided, and the lid heating means is controlled based on the output of the lid temperature detecting means when reheating the cooked rice. Rice cooker. The rice cooker according to claim 1 or 2, wherein the water container is detachably provided on the upper surface of the lid.