JP5089549B2 - rice cooker - Google Patents

Description

  The present invention relates to a rice cooker, and more particularly to a rice cooker in which dew condensation does not occur in a display unit installed in a lid provided rotatably in a rice cooker body.

In an electronically controlled rice cooker, it is essential to equip a substrate having an operation unit and a display unit, and the installation position is roughly divided into the following two types.
1. It is installed in the rice cooker body.
2. It is installed in a lid that is pivotally provided in the rice cooker body.
Among these, the one installed in the lid body of the above 2 has the advantage that the outer diameter of the product can be designed to be small, but on the other hand, the display part is installed above the inner pot for storing the cooked food. The temperature in the substrate room was large, and condensation was likely to occur on the display unit due to the temperature difference from the outside air.
In order to solve this problem, a substrate chamber in which a substrate having a display unit is installed is cut off from outside air, and a desiccant is installed in the substrate chamber (for example, see Patent Document 1). There has been one in which a heat source is arranged at a position away from it (see, for example, Patent Document 2).
JP 2000-237043 A (first page, FIG. 1) JP 2000-70129 A (first page, FIG. 1)

In the conventional rice cooker described in Patent Document 1, there is a conventional rice cooker in which the substrate chamber where the substrate having the display unit is installed is substantially sealed and a desiccant is installed, but the decision is made to prevent condensation from forming on the display unit. It was n’t.
This is because the substrate chamber is not completely sealed, that is, a communication hole communicating with the outside air has to be provided in order to prevent an increase in internal pressure due to a temperature increase in the substrate chamber. In this case, it was an inevitable phenomenon that the desiccant could not perform its function and condensation occurred on the display portion.
In addition, in the conventional rice cooker described in Patent Document 2, a heat source disposed at a position as far away from the substrate chamber as possible is not completely affected by the heat source and does not cause condensation on the display unit. There was a problem that it was difficult.
The present invention has been made in order to solve such a problem, and prevents the display unit from being condensed by preventing the desiccant installed in the substrate chamber in which the display substrate having the display unit is installed from becoming saturated. The purpose is to obtain a cooked rice cooker.

A rice cooker according to the present invention includes a rice cooker body, a lid provided rotatably on the rice cooker body, an operation panel provided on the lid, and provided below the operation panel and sealed. a substrate chamber that is, disposed in the substrate chamber, a rice cooker and a display substrate having a display unit for displaying an operation state of the operation panel, and a substrate chamber and the outside before Symbol substrate chamber A communication passage member for communication is provided, a heating chamber having a heating means is provided immediately below the substrate chamber, the bottom of the substrate chamber also serves as the top surface of the heating chamber, and at the bottom of the substrate chamber, A concave desiccant storage section is provided above the heating chamber, and the desiccant storage section stores the desiccant.

  In the rice cooker according to the present invention, a lid provided rotatably on the rice cooker body, and a substrate chamber sealed below the operation panel provided on the lid are provided, and the operation panel is provided in the substrate chamber. A display substrate having a display unit for displaying the operation state is disposed, a desiccant is disposed in the substrate chamber, a communication passage member is provided in the substrate chamber, and the substrate chamber communicates with the outside. Since the heating chamber having the heating means is provided, the heating means of the heating chamber is heated during rice cooking, the heat is conducted to the heating chamber, and the desiccant disposed in the substrate chamber above the heating chamber is heated, The water vapor in the desiccant is discharged out of the desiccant, and the water vapor is discharged to the outside through the communication path member. Since it is absorbed by the desiccant in the substrate chamber, it is placed in the substrate chamber. It has been an effect that does not cause dew condensation on the display unit.

Embodiment 1 FIG.
FIG. 1 is a cross-sectional view showing a configuration of the rice cooker according to Embodiment 1 of the present invention, and FIG. 2 is a cross-sectional view showing a configuration of a main part of the rice cooker.
In FIG. 1, the rice cooker body 1 includes an inner pot 2. The inner pot 2 is a bottomed cylindrical container whose outer surface is made of a magnetic metal, and a flange portion formed on the periphery of the opening is suspended above the protective frame 3.
The protective frame 3 has an opening for storing the inner pot 2, and includes an upper frame 3 a, a side heat dissipating plate 5 to which the body heater 4 is attached, and a coil base 7.

The induction coil 6 which is a heating means supported by the coil base 7 of the protective frame 3 includes a side induction coil 6 a disposed so as to face the bottom corner portion of the inner pot 2, and a bottom portion of the inner pot 2. The bottom induction coil 6b is disposed so as to face each other.
The ferrite 8 is formed so as to cover the side induction coil 6 a and the bottom induction coil 6 b of the induction coil 6, and is supported by a ferrite base 9 attached to the coil base 7.
The ferrite 8 is provided so that the magnetic flux generated from the side induction coil 6a and the bottom induction coil 6b does not leak to the outside.
A bottom sensor 10 made of a thermistor serving as a pan temperature detecting means is attached through the central portion of the coil base 7, contacts the bottom of the inner pan 2, and indirectly controls the temperature of the rice cooked in the inner pan 2. Detect.

A lid 12 that covers the upper portion of the rice cooker body 1 is supported by a hinge portion 3b that is integrally formed with the upper frame 3a of the protective frame 3 via a shaft 13 so as to be freely opened and closed. A lid heat sink 14 is attached to the lower part of the inner surface of the lid 12, and a lid heater 15 is attached to the inner surface of the lid heat sink 14.
An operation panel 16 provided with various operation switches is provided on the upper front side of the lid 12. Further, an inner lid 17 is detachably attached to the lower surface of the lid 12 by an inner lid locking piece 18. The inner lid locking piece 18 is held by a locking piece holding member 19 provided on the lower front side of the lid 12.

A packing 20 that contacts and closes the inner pot 2 when the lid 12 is closed is disposed on the outer periphery of the inner lid 17. Further, a lid temperature sensor 21 made of a thermistor is attached to the inner lid 17 so as to penetrate the inner lid 17 and protrude from the lid heat radiating plate 14 to the inner pan 2 side, and detects the ambient temperature inside the inner pan 2. To do.
Further, a steam port cartridge 22 is disposed on the upper rear side of the lid body 12, and a steam passage 23 is formed inside the steam port cartridge 22. In addition, a return valve 24 is attached for returning the accumulated powder in the cartridge when the interior of the kettle returns to room temperature.

Below the operation panel 16, a concave substrate chamber 26 that is integral with the upper outer side of the lid 12 is provided. A display unit mounting frame 27 is disposed in the substrate chamber 26, a display substrate 28 is mounted below the display unit mounting frame 27, setting information such as a reservation time, and rice A liquid crystal display unit 29 which is a display means for displaying the operation state such as the type and the cooked state is attached.
Furthermore, a concave desiccant storage part 26a is provided in the center of the bottom of the substrate chamber 26, and a desiccant 30 is disposed in the desiccant storage part 26a.
In addition, a communication path member 31 formed of, for example, a silicon tube is attached to the side portion of the substrate chamber 26 so as to penetrate the bottom portion. The communication path member 31 communicates the inside of the substrate chamber 26 with the outside.
Further, a heating chamber 33 in which the outer peripheral position of the lid heater 15 is partitioned by a partition plate 32 is provided between the bottom of the substrate chamber 26 and the lid heat radiating plate 14.

A control board 35 is disposed at the rear of the rice cooker body 1, and a control circuit 36 having control means (not shown) is provided on the control board 35.
The control means consists of a microcomputer, and implements each process from rice cooking to heat insulation according to a program stored in advance.

Next, operation | movement of the rice cooker of Embodiment 1 of this invention is demonstrated.
At the time of rice cooking, the inner pot 2 is electromagnetically heated by the induction heating coil 6 and the amount of heating to the inner pot 2 is adjusted based on the temperature detected by the bottom sensor 10 and the lid temperature sensor 21 and the time management.
Specifically, when cooking rice and the bottom sensor 10 that detects the temperature of the inner pot 2 reaches the predetermined cooking temperature (120 ° C.), the rice and water to be cooked in the inner pot 2 are heated. Heating is stopped and the process is shifted to steaming. This steaming is continued for 15 minutes to cook rice in the inner pot 2.
In addition, the heat-retaining heating is performed following the cooking of rice. In this heat insulation heating, the inner pot 2 is electromagnetically heated by the induction heating coil 6 and the amount of heating to the inner pot 2 is adjusted based on the temperature detected by the bottom sensor 10 and the lid temperature sensor 21 and the time management. The temperature of the inner pot 2 detected by the pot temperature detecting means 10 is maintained at 60 to 80 ° C.
At this time, based on the temperature detected by the lid temperature sensor 21, the temperature of the inner surface of the lid 12 is held slightly higher than the temperature of the rice in the inner pot 2.

  In the first embodiment, the heating chamber 33 in which the outer peripheral position of the lid heater 15 is partitioned by the partition plate 32 is provided between the lid heat sink 14 having the lid heater 15 and the bottom of the substrate chamber 26. When cooking rice, not only the induction heating coil 6 but also the lid heater 15 is heated, the heat of the lid heater 15 is also conducted to the heating chamber 33, and the desiccant 30 in the recess 26 a of the substrate chamber 26 above the heating chamber 33 is removed. The water vapor that is heated and absorbed inside the desiccant 30 is discharged out of the desiccant 30, and the steam discharged outside is discharged outside through the communication path member 31, so that the desiccant over time In order to absorb the amount of water vapor remaining in the substrate chamber 26 by the desiccant 30 disposed in the desiccant storage portion 26 a of the substrate chamber 26 without causing a functional degradation of the liquid crystal 30, the liquid crystal disposed in the substrate chamber 26. Condensation on display 29 It is not possible to time difference.

Further, since the substrate chamber 26 above the lid heater 15 is also heated through the heating chamber 33, the temperature in the substrate chamber 26 rises, and the internal pressure in the sealed substrate chamber 26 rises accordingly. Since the air whose internal pressure has increased by the communication passage member 31 that communicates between the chamber 26 and the outside is discharged to the outside, the increase in the internal pressure of the substrate chamber 26 is suppressed.
In addition, although the above description is about the case where not only the induction heating coil 6 but also the lid heater 15 is heated at the time of rice cooking, a dedicated switch for turning on and off the lid heater 15 other than at the time of rice cooking is provided, If necessary, the switch is turned on to heat the lid heater 15 so that the water vapor absorbed in the desiccant 30 is discharged out of the desiccant 30 to prevent deterioration of the function of the desiccant 30 over time. May be.

Embodiment 2. FIG.
FIG. 3 is a cross-sectional view showing a configuration of a main part of the rice cooker according to Embodiment 2 of the present invention.
In the second embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and the description of the overlapping components is omitted.
In the second embodiment, a desiccant storage section 26b partitioned by a plate is provided at the bottom of the substrate chamber 26, and a heating chamber is provided on the bottom surface of the substrate chamber 26 in the heating chamber 33 separately from the lid heater 15 of the first embodiment. A heater 34 is provided.
At the time of rice cooking, not only the lid heater 15 but also the heating chamber heating heater 34 is heated, and the desiccant 30 in the desiccant storage portion 26b immediately above the heating chamber heating heater 34 is heated. It is stronger and more efficient than that.
In the case of the second embodiment, a dedicated switch for turning on / off the lid heater 15 and the heating chamber heating heater 34 is provided, and the switch is turned on as necessary to heat the lid heater 15 and the heating chamber. The heater 34 may be heated to discharge the water vapor absorbed in the desiccant 30 to the outside of the desiccant 30 to prevent the function of the desiccant 30 from being deteriorated over time.

Embodiment 3 FIG.
FIG. 4 is a cross-sectional view showing the configuration of the main part of the rice cooker according to Embodiment 3 of the present invention.
In the third embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and the description of the overlapping components is omitted.
The third embodiment should also be referred to as a modified example of the first embodiment, and has a U-shaped cross section for efficiently conducting the heat of the lid heater 15 in the heating chamber 33 to the bottom surface of the substrate chamber 26 in the heating chamber 33. Thus, a heat transfer metal plate 35 made of copper or aluminum is provided.
One end side of the U-shaped heat transfer metal plate 35 is in contact with the lid heater 15, and the other end side is in contact with the bottom surface of the substrate chamber 26 in the heating chamber 33.
In the first embodiment, the heat of the lid heater 15 heats the desiccant 30 in the desiccant storage portion 26b provided on the bottom surface of the substrate chamber 26 through the air in the heating chamber 33, whereas this embodiment is performed. In Embodiment 3, heat of the lid heater 15 is provided in the heating chamber 33, one end side is in contact with the lid heater 15, and the other end side is in contact with the bottom surface of the substrate chamber 26 in the heating chamber 33. Since the desiccant 30 in the desiccant storage part 26b provided on the bottom surface of the substrate chamber 26 is heated via the hot metal plate 35, it is stronger and more efficient than the first embodiment.
Similarly to the first embodiment, this third embodiment also has a dedicated switch for turning on / off the lid heater 15 other than during rice cooking, and the lid heater 15 is heated by turning on the switch as necessary. Then, the water vapor absorbed in the interior of the desiccant 30 may be discharged out of the desiccant 30 to prevent the function of the desiccant 30 from deteriorating over time.

Embodiment 4 FIG.
FIG. 5 is a cross-sectional view showing a configuration of a main part of the rice cooker according to Embodiment 4 of the present invention.
In the fourth embodiment, the same components as those of the first embodiment are denoted by the same reference numerals, and the description of the overlapping components is omitted.
In the fourth embodiment, a desiccant storage portion 26b partitioned by a plate is provided at the bottom of the substrate chamber 26, and a heating chamber is provided in the heating chamber 33 on the bottom surface of the substrate chamber 26 instead of the lid heater 15 of the first embodiment. Inductive heating coil 36 is provided.
Further, a magnetic metal plate 37 is provided between the bottom of the substrate chamber 26 and the upper end of the partition plate 32.

At the time of rice cooking, when a high frequency current is passed through the heating chamber induction heating coil 36, the magnetism provided between the bottom of the substrate chamber 26 and the upper end of the partition plate 32 by induction heating of the heating chamber induction heating coil 36. Since an eddy current flows through the metal plate 37, the magnetic metal plate 37 is heated, and the desiccant 30 in the desiccant storage portion 26b immediately above the magnetic metal plate 37 is heated, so that compared with the lid heater 15 of the first embodiment. Can be heated more strongly and efficiently.
In the case of the fourth embodiment, a dedicated switch for turning on and off only the heating chamber induction heating coil 36 is provided. If necessary, the switch is turned on to pass a high-frequency current through the induction heating coil 36. The magnetic metal plate 37 may be heated to discharge the water vapor absorbed inside the desiccant 30 to the outside of the desiccant 30 to prevent the function of the desiccant 30 from deteriorating over time.

Sectional drawing which shows the structure of the rice cooker of Embodiment 1 of this invention. Sectional drawing which shows the structure of the principal part of the rice cooker. Sectional drawing which shows the structure of the principal part of the rice cooker of Embodiment 2 of this invention. Sectional drawing which shows the structure of the principal part of the rice cooker of Embodiment 3 of this invention. It is sectional drawing which shows the structure of the principal part of the rice cooker of Embodiment 4 of this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 Rice cooker main body, 2 Inner pan, 6 Induction coil (heating means), 10 Bottom sensor, 12 Lid body, 15 Lid heater, 16 Operation panel, 17 Inner lid, 21 Lid temperature sensor, 26 Substrate room, 27 Display part attachment Frame, 28 Display board, 29 Liquid crystal display part, 29a Concave part, 30 Desiccant, 31 Communication channel member, 32 Partition plate, 33 Heating chamber, 35 Control board, 36 Control part.

Claims (5)

A rice cooker body, a lid provided rotatably on the rice cooker body, an operation panel provided on the lid, a substrate chamber provided below the operation panel and sealed, and the substrate A rice cooker provided with a display substrate having a display unit disposed in a room and displaying an operation state of an operation panel,
Communication passage member communicating is provided a substrate chamber and the outside before Symbol substrate chamber,
A heating chamber having heating means is provided directly below the substrate chamber ,
The bottom of the substrate chamber also serves as the top surface of the heating chamber,
At the bottom of the substrate chamber, a concave desiccant storage portion is provided at an upper position of the heating chamber,
The desiccant storage unit stores a desiccant.
A rice cooker characterized by that. A rice cooker body, a lid provided rotatably on the rice cooker body, an operation panel provided on the lid, a substrate chamber provided below the operation panel and sealed, and the substrate A rice cooker provided with a display substrate having a display unit disposed in a room and displaying an operation state of an operation panel,
A communication passage member is provided in the substrate chamber for communicating the substrate chamber with the outside;
A heating chamber having heating means is provided directly below the substrate chamber,
The bottom of the substrate chamber also serves as the top surface of the heating chamber,
A desiccant is disposed on the bottom of the substrate chamber and above the heating chamber,
The heating means of the heating chamber is a lid heater and a heater for heating the heating chamber provided on the top surface of the heating chamber. A rice cooker body, a lid provided rotatably on the rice cooker body, an operation panel provided on the lid, a substrate chamber provided below the operation panel and sealed, and the substrate A rice cooker provided with a display substrate having a display unit disposed in a room and displaying an operation state of an operation panel,
A communication passage member is provided in the substrate chamber for communicating the substrate chamber with the outside;
A heating chamber having heating means is provided directly under the substrate chamber,
The bottom of the substrate chamber also serves as the top surface of the heating chamber,
A desiccant is disposed on the bottom of the substrate chamber and above the heating chamber,
Said heating means of the heating chamber, 炊 rice you wherein the lid heater, and said portion in contact with the lid heater, a heat transfer metal plate another part in contact with the top surface portion of the heating chamber vessel. A rice cooker body, a lid provided rotatably on the rice cooker body, an operation panel provided on the lid, a substrate chamber provided below the operation panel and sealed, and the substrate A rice cooker provided with a display substrate having a display unit disposed in a room and displaying an operation state of an operation panel,
A communication passage member is provided in the substrate chamber for communicating the substrate chamber with the outside;
A heating chamber having heating means is provided directly under the substrate chamber,
The bottom of the substrate chamber also serves as the top surface of the heating chamber,
A desiccant is disposed on the bottom of the substrate chamber and above the heating chamber,
The heating means of the heating chamber is provided so as to face the heating chamber at the bottom of the substrate chamber and the induction heating coil provided at the bottom of the heating chamber, and is heated by induction heating of the induction heating coil for the heating chamber. 炊 rice instrument you being a magnetic metal plate being. The rice cooker according to any one of claims 1 to 4 , wherein the rice cooker main body is provided with a switch for turning on and off a current flowing through the heating means of the heating chamber.

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