JP2009125261A - Rice cooker with warmer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rice cooker with warmer which reduces the consumption power amount especially at the time of hot keeping by improving the heat-insulating property, and at the same time, which can be used in comfort while heat is not felt even if a user touches the main body top surface during use. <P>SOLUTION: For the main body 1 which detachably houses a pan 2, the profile is constituted of an upper frame 3 which constitutes the top surface, and a body 4 which has a cylindrical shape having a bottom, and constitutes the side surface and the bottom surface. A main body heat-insulating material 21 is arranged on at least one of the top and bottom surfaces of the upper frame 3. Thus, the heat-insulating property is increased by stopping a convection current heat which releases upward by the main body heat-insulating material 21, and the consumption power amount especially at the time of hot keeping is reduced. At the same time, by the heat-insulating action of the main body heat-insulating material 21, even if the user touches the top surface of the main body 1 during use, the heat is not felt, and this rice cooker with warmer can be used in comfort. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a jar rice cooker used for general household or business use.

Conventionally, as a jar rice cooker with improved heat insulation, a heat insulating wall is provided on the outer periphery of a protective frame surrounding the side of the pan, and a heat insulating material is interposed between the heat insulating wall and the protective frame (for example, Patent Document 1), and those in which a hollow portion is provided between a pan peripheral portion and an outer shell portion of an upper frame that supports a flange portion of the pan (for example, refer to Patent Document 2) are known.
JP-A-8-322710 JP 2007-105359 A

  However, in the configuration as described in Patent Document 1, since there is a heat insulating material in the side surface direction, a heat insulating effect in the side surface direction can be expected, but no effect can be expected for convective heat escaping upward, Touching the top of the main body felt hot, and a sufficient heat insulation effect could not be obtained.

  Further, in the configuration as described in Patent Document 2, a hollow portion is provided above the upper surface of the main body, but convection heat is directly transmitted to the members constituting the upper surface of the main body, so that a sufficient heat insulating effect is obtained. I couldn't.

  The present invention solves the above-mentioned conventional problems, improves heat insulation, especially reduces the amount of power consumption during heat retention, and does not feel hot even when touching the upper surface of the main body during use, and can be used with peace of mind. The purpose is to provide a rice cooker.

  In order to solve the above-mentioned conventional problems, the jar rice cooker of the present invention has a main body that detachably stores a pan, an upper frame that forms the upper surface thereof, and a body that forms a side surface and a bottom surface with a bottomed cylindrical shape. The outer shell is configured, and a main body heat insulating material is disposed on at least one of the upper and lower surfaces of the upper frame.

  This prevents the convective heat escaping upward by the main body heat insulating material and improves the heat insulating property.In particular, while reducing the power consumption during the heat insulation, the heat insulating action of the main body heat insulating material causes the upper surface of the main body to be in use. It does not feel hot when touched, and can be used with confidence.

  Especially the jar rice cooker of this invention reduces the power consumption at the time of thermal insulation, and even if it touches a main body upper surface during use, it does not feel hot, and can be used in comfort.

  1st invention has a pan, the main body which detachably accommodates a pan, the pan heating means which heats a pan, and the cover body which covers the upper surface of a main body so that opening and closing is possible, The said main body covers the upper surface. By configuring the outer frame with the upper frame to be configured and the body with the bottomed cylindrical shape forming the side surface and the bottom surface, and making the jar rice cooker with the main body heat insulating material disposed on at least one of the upper and lower surfaces of the upper frame, upward The main body insulation prevents the convection heat that escapes and improves the heat insulation.In particular, it reduces the power consumption during heat insulation, and it feels hot even if you touch the top of the main body during use due to the heat insulation of the main body insulation. It can be used with peace of mind.

  In the second invention, in particular, in the first invention, an upper frame cover is provided on the upper surface of the upper frame, and the main body heat insulating material is disposed between the upper frame cover and the upper frame, whereby the main body heat insulating material is changed to the upper surface of the main body. In addition to reducing the amount of power consumed during heat insulation, especially when touching the top of the main unit during use, it does not feel hotter and can be used with peace of mind. It is possible to add antifouling, decoration, anti-magnetic and other functions to the upper surface of the main body.

  In the third invention, in particular, in the first invention, an upper frame cover is provided on the upper surface of the upper frame, and a main body heat insulating material is provided on the upper frame side surface of the upper frame cover. It becomes possible to give a heat insulation effect to the upper surface of the main body simply by assembling, so that the assemblability can be greatly improved, and it is possible to add antifouling, decoration, anti-magnetic and other functions to the upper surface of the main body. In addition, the heat conduction to the top surface of the main body is suppressed, and in particular, the power consumption during heat insulation is reduced more effectively, and even if the top surface of the main body is touched during use, it does not feel hot and can be used with peace of mind.

  According to a fourth invention, in particular, in the first or third invention, by providing a gap between the main body heat insulating material and the upper frame, heat conduction from the main body heat insulating material to the upper surface of the main body is suppressed, As well as reducing the amount of power consumed, it can be used with confidence without touching the top of the main unit during use.

  In the fifth invention, in particular, in the second invention, by providing a gap between the main body heat insulating material and the upper frame cover, the power consumption during heat insulation is further reduced, and the upper surface of the main body is touched during use. Can be used with peace of mind.

  According to a sixth aspect of the invention, in particular, in the third aspect of the invention, the main body heat insulating material provided on the upper frame side surface of the upper frame cover is integrated with the upper frame cover as a heat insulating layer, so that the upper frame cover is assembled during assembly. It becomes possible to give a heat insulation effect to the upper surface of the main body, and the assemblability is greatly improved. In addition, the heat insulation layer increases the number of places where it can be installed, further suppresses heat conduction to the top surface of the main unit, and more effectively reduces the amount of power consumed during thermal insulation. It can be used with peace of mind. Further, as in the third aspect of the invention, it is possible to add antifouling, decoration, anti-magnetic and other functions to the upper surface of the main body.

  According to a seventh aspect of the invention, in particular, in the third or sixth aspect of the invention, the upper frame cover has a cylindrical portion facing the side surface of the pan, so that heat is less likely to escape to the outside. In particular, it is possible to reduce the amount of heat insulation.

  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)
FIGS. 1-3 has illustrated the electromagnetic induction heating type jar rice cooker as the jar rice cooker in Embodiment 1 of this invention.

  As shown in FIG. 1, the main body 1 of the jar rice cooker in the present embodiment has an outer frame constituted by an upper frame 3 that constitutes an upper surface and a body 4 that has a bottomed cylindrical shape and constitutes a side surface and a bottom surface. . The upper frame 3 has a cylindrical hole portion 3a, and a bottomed cylindrical pot storage portion 1a is constituted by a cylindrical metal protective frame body 5 and a dish-shaped protective frame 6 which are continuous from the hole portion 3a. Then, the pan 2 is stored detachably. The pot 2 is induction-heated by the pot heating means 7 composed of a bottom induction coil provided at the bottom of the protective frame 6 to perform rice cooking and heat insulation.

  Here, a plurality of bottom ferrites 8 made of a magnetic material are provided on the opposite side of the pan 2 in an arrangement facing the pan heating means 7 and orthogonal to the pan heating means 7.

  The bottom sensor 9 contacts the bottom surface of the pan 2 to detect the temperature of the pan 2 and sends a signal to the microcomputer 10. The microcomputer 10 changes the energization amount of the pan heating means 7 from the signal of the bottom sensor 9 and varies the high-frequency current supplied from the heating power sending part 12 of the pan 2 to the pan heating means 7 to change the temperature of the pan 2 to Control to an appropriate temperature when keeping warm. The heating power delivery unit 12 has a heat sink 13 made of aluminum or aluminum die cast, and a fan motor 14 that blows outside air is attached to the heat sink 13. A reflection frame 32 is annularly provided on the outer periphery of the pan heating means 7.

  A hinge portion 15e is provided on the upper surface of the upper frame 3 at the rear of the main body 1, and a lid 15 is pivotally supported by a hinge shaft 16 attached to the hinge portion 15e and covers the upper surface of the main body 1 so as to be freely opened and closed. A hinge spring 17 is attached to the hinge portion 15 e so as to engage with both the lid body 15 and the main body 1, and has a biasing force in a direction to open the lid body 15. A hinge cover 15d covers the outer portion of the rear portion of the hinge portion 15e so that the hinge shaft 16 and the hinge spring 17 cannot be seen from the outside.

  The hook lever 18 in front of the main body 1 is engaged with a hook fitting portion 15a provided at the tip of the lid body 15 so that the lid body 15 does not open against the force of the hinge spring 17, and keeps the closed state. When the hook lever 18 is pushed, the hook fitting portion 15 a and the hook lever 18 are disengaged, and the lid 5 is opened by the force of the hinge spring 17. Although not shown, a hinge brake plate is provided near the hinge portion 15e of the lid 15. Further, the hinge portion 15e is provided with a hinge cap, and the hinge brake plate and the hinge cap constitute a brake mechanism when the lid is opened. A main body rear leg 1b is disposed behind the main body 1 which is usually slightly lifted from the floor surface.

  As shown in detail in FIG. 2, a side heater 20 is wound around the outer periphery of the protective frame body 5. An annular main body heat insulating material 21 is disposed on the lower surface of the upper frame 3. A slight gap 21 a is provided between the lower surface of the upper frame 3 and the main body heat insulating material 21.

  As shown in FIG. 3, the surface of the lid 15 is constituted by an outer lid 22, and the pot 2 side is constituted by an outer lid cover 23.

  The outer lid cover 23 has a hole in a cylindrical shape, and a steam heating plate 24 made of a non-magnetic metal and a thin plate having a thickness of 0.5 mm or less is attached to the hole. Here, typical examples of nonmagnetic metals include austenitic stainless steel. A lid heating means 26 comprising an annular lid induction coil mounted on the lid coil support 25 is provided on the upper portion of the steam heating plate 24. A lid temperature fuse 27 is installed so as to be sandwiched between the lid coil support 25 and the lid heating means 26. A lid reflecting plate 34 is provided above the lid heating means 26 to prevent the high-frequency magnetic field from the lid heating means 26 from leaking outside.

  On the pan 2 side of the outer lid cover 23, there is a heating plate 29 made of magnetic metal which is integrally held by a caulking connection to the heating plate support 28 and is detachable from the lid 15 in an integrated state with the heating plate support 28. is there. Here, typical examples of magnetic metals include iron plates and ferritic stainless steel.

  Between the heating plate 29 and the flange portion 2a of the pan 2, a pot packing 31 integrally joined to the heating plate 29 by a heating plate support 28 seals the heating plate 29 and the flange portion 2a of the pan 2 in a watertight manner. Further, a steam heating plate packing 47 is provided between the steam heating plate 24 and the heating plate 29 on the outer peripheral portion thereof, and the space between the heating plate 29 and the steam heating plate 24 is sealed in a watertight manner.

  The lid sensor 30 abuts on the heating plate 29 with a pressure applied by the lid sensor spring 33 and detects the temperature of the heating plate 29. A lid sensor packing 46 is provided between the lid sensor 30 and the steam heating plate 24.

  Inside the outer lid 22, an operation substrate 35 constituting the operation unit 15 b and the display unit 15 c is installed so as to be covered with a substrate cover 36. A liquid crystal 39 on the operation board 35 displays a setting state and an operation state of the jar rice cooker. A part of the outer lid 22 is made of a transparent resin, and the surface thereof is integrally covered with a film 22b. And it has the embossed part 22a which consists of a part only of a film partially. The embossed portion 22a bends up and down, and the embossed portion 22a, the key top 37 provided on the operation board 35, and the tact switch 38 constitute an operation switch, and the operation portion 15b is constituted by a plurality of operation switches.

  The substrate cover packing 40 is sandwiched between the outer periphery of the substrate cover 36 and the substrate cover seal rib 22c provided on the outer lid 22, and seals between the substrate cover 36 and the outer lid 22 in a watertight manner. Even if the liquid enters, the operation substrate 35 is prevented from dewing.

  A steam passage portion 36 a is provided in the central portion of the substrate cover 36. The steam passage 36a has a cylindrical shape that penetrates the outer lid 22 and faces the outside, and holds the steam cylinder 41 in a detachable manner. A space between the outer periphery of the steam passage portion 36a and the outer lid 22 is sealed with a steam passage packing 42 in a watertight manner. The operation substrate 35 disposed inside the lid 15 by the seal by the substrate cover packing 40 and the steam passage packing 42 is configured so that water and steam from the outside are not directly applied. The steam plate packing 45 seals the steam passage 36a, the steam heating plate 24, and the heating plate 29 in a watertight manner.

  The steam cylinder 41 has a magnet 43 that operates in a direction approximately orthogonal to the longitudinal direction of the hinge shaft 16, and a spillage detection means and lid open / close detection during cooking with a lead SW 44 provided in a portion facing the magnet 43 and the steam cylinder 41. Configure the means.

  Next, the operation in the above configuration will be described.

  The hook lever 18 is pushed, the lid 15 is opened, rice to be cooked and water corresponding to the amount of the rice are put into the pan 2 and are installed in a predetermined state of the pan storage portion 1a. Here, the brake mechanism including the hinge brake plate and the hinge cap has a braking force when the lid is opened so that the main body 1 does not bounce with the opening force when the lid 15 is completely opened by the opening operation of the lid 15. appear. As a result, the lid 15 automatically opens when the hook lever 18 is pressed, but the bounce of the main body 1 due to the momentum of the lid 15 does not occur. In addition, the center of gravity of the main body 1 moves rearward when the lid is opened, but the main body rear leg 1b that is slightly lifted from the floor surface abuts against the floor surface to prevent the main body 1 from falling backward due to the momentum. Prevents the body 1 from falling backward. Therefore, the user can open the lid 15 with a sense of security without worrying about the bounce of the lid 15.

  By the way, when the lid 15 is opened, the magnet 43 is moved away from the lead SW 44 by gravity, and the contact of the lead SW 44 is opened. Thereby, opening / closing of the lid 15 can be detected.

  Subsequently, it is confirmed whether there is a predetermined amount or more of water in the steam generating means (not shown), and if not, water is supplied to the steam generating means. And if a user operates the rice cooking start switch (not shown) of the operation part 15b, the microcomputer 10 will receive the input from a rice cooking start switch, and a rice cooking process will be implemented. At this time, the operation state is displayed on the liquid crystal 39, the transparent resin on the liquid crystal 39 is transmitted, and the display of the liquid crystal 39 is made visible from the outside to constitute the display unit 15c. Inform the operating status.

  The bottom sensor 9 detects the temperature of the bottom surface of the pan 2 and sends a signal to the microcomputer 10. Receiving a signal from the bottom sensor 9, the microcomputer 10 has a predetermined time at a temperature at which the water and rice state in the pan 2 are set as appropriate values in each of the rice cooking processes roughly divided into the water immersion, cooking, and steaming processes. As a result, the energizing amount of the pot heating means 7, the lid heating means 26, the side heater 20, and the steam generating means energized from the heating power delivery unit 12 is controlled as an output.

  In the induction heating method, when a high frequency magnetic field generated from a high frequency current passed through each induction coil passes through the metal to be heated, induction heating is caused to generate heat. Here, when supplying the high-frequency current to each induction coil, the heating power delivery unit 12 self-heats due to an electrical resistance loss and a switching loss when a high frequency is generated. If the heating power delivery unit 12 is self-heated and the heating power delivery unit 12 becomes higher than the allowable temperature, the heating power delivery unit 12 may break down. Therefore, the heating power delivery unit 12 can be made of aluminum or aluminum die cast. The heat sink 13 is provided, and the self-heat generation is radiated through the heat sink 13. Further, the heat sink 13 is cooled by the fan motor 14, and the heating power delivery unit 12 is efficiently cooled.

  The pan heating means 7 generates heat at the bottom of the pan 2 by induction heating with a current supplied from the heating power delivery unit 12. Here, the bottom ferrite 8 is made of a magnetic material, and efficiently collects the magnetic field generated from the pan heating means 7 to the pan side. Thereby, a high-density magnetic field is generated around the pan 2, and the pan 2 generates heat more efficiently. The reflection frame 32 prevents the high-frequency magnetic field from the pan heating means 7 from leaking out of the main body 1 and does not affect the surrounding equipment.

  The lid heating means 26 causes the steam heating plate 24 and the heating plate 29 to simultaneously generate heat by induction heating with the current supplied from the heating power delivery unit 12. Here, since the steam heating plate 24 is composed of a non-magnetic metal and a thin plate of 0.4 mm or less as described above, it self-heats by induction heating while transmitting a high-frequency magnetic field generated from the lid heating means 26. The high frequency magnetic field transmitted through the steam heating plate 24 causes induction heating of the heating plate 29 made of magnetic metal, and causes the heating plate 29 to self-heat. Thereby, the steam heating plate 24 and the heating plate 29 can generate heat simultaneously. Further, the heat generation ratio between the steam heating plate 24 and the heating plate 29 can be arbitrarily set by the distance from the lid heating means 26, the material properties of the steam heating plate 24, and the plate pressure. Further, the lid reflector 34 above the lid heating means 26 prevents the high frequency magnetic field from the lid heating means 26 from leaking to the outside, and is devised so as not to affect the microcomputer 10 and surrounding devices. .

  The side heater 20 generates heat by the current supplied from the heating power delivery unit 12, and heats the space near the side surface of the pan 2 by heating the metal protective frame body 5.

  Then, operation | movement of the jar rice cooker in each process is demonstrated.

  First, in the soaking process, the pot heating means 7 is energized to heat the pot 2 so that the temperature of the rice and water rises to a temperature at which rice gelatinization does not start. Then, the rice is submerged for a predetermined time at a predetermined temperature, and sufficient water absorption is promoted throughout the rice. In the flooding process, it is important to keep the whole rice in the pan 2 uniformly at a target temperature and keep the water absorption conditions of the rice in the pan 2 uniform to cook delicious rice.

  Next, in the cooking step, the pot heating means 7 generates heat at the bottom of the pot 2, the lid heating means 26 generates heat at the steam heating plate 24 and the heating plate 29, and the side heater 20 provides a space near the side of the pot 2. And heat so that the entire pan 2 is wrapped. In this case, it is important to cook at a stretch by high heat and transfer heat to the core of the rice. In the induction heating method, the pan can be heated with a higher heating power than the method in which the pan 2 is heated by a hot plate, and more delicious rice is cooked.

  The steam generated when the water in the pot 2 boils flows from a heating plate steam port (not shown) provided in the heating plate 29 to the steam cylinder 41 of the steam passage portion 36a. Here, Oneba, which is boiled soup generated during cooking, also flows into the steam cylinder 41. When a large amount of Oneba flows, the Oneba pushes up the magnet 43 before it spills, and the reed SW 44 is activated so that it can be detected. To do. This makes it possible to cook more delicious rice by heating up to just before spilling, depending on the amount of water, where the heat is drawn in advance so that it does not spill even if there is a lot of water and it is easy to spill. .

  Also, the pot packing 31 and the steam plate packing 45 do not cause steam to flow out of the steam cylinder 41 or flow into the lid 15.

  Finally, in the unevenness process, the pan heating means 7 heats the bottom of the pan 2 to such an extent that the rice on the bottom of the pan 2 does not dry or burn. Then, the steam generated by the steam generating means (not shown) is sent into the space between the steam heating plate 24 and the heating plate 29. The steam heating plate 24 and the heating plate 29 are heated to a high temperature by the lid heating means 26, and the fed steam is changed to a high temperature steam of 100 ° C. or higher. The steam having a high temperature is introduced into the pan 2 from a high-temperature steam inlet (not shown) provided on the heating plate 29, and the inside of the pan 2 is brought into a high temperature / high humidity state. Furthermore, the side heater 20 heats the side surface of the pan 2 to bring it into a high temperature state so as to wrap the inside of the pan 2.

  Here, the steam sent from the steam generating means by the lid sensor packing 46 and the steam heating plate packing 47 does not leak to the outside or the inside of the lid, and does not leak to the steam passage portion 36a by the steam plate packing 45. It is heated to high temperature steam and sent into the pan 2.

  In the spotting process, it is important to keep the whole pan 2 at a high temperature at a temperature at which the rice does not dry or burn so that the rice is gelatinized to the core, but at least 100 ° C. as in this embodiment First, the steam is supplied, so that the rice is not dried. Moreover, secondly, when steam is supplied at a temperature of 100 ° C. or lower, water stays attached to the surface of the grain of rice, but since it is a steam of 100 ° C. or higher, it has the energy necessary to advance the gelatinization of rice starch and is gelatinized. Can improve rice cooking performance. Furthermore, by heating so that the steam is sandwiched between the two hot plates of the steam heating plate 24 and the heating plate 29, the temperature of the steam can be instantaneously and efficiently changed to high temperature steam, so cook more delicious rice. be able to. Further, since the heating plate 29 is at a high temperature of 100 ° C. or higher, the heating plate 29 is not dewed after cooking.

  When cooking is completed, the process proceeds to the heat insulation process. In the heat retaining step, the pan heating means 7 heats the pan 2 so as to maintain the temperature of the rice in the pan 2 at a predetermined temperature based on the temperature detected by the bottom sensor 9.

  And the cover heating means 26 and the side heater 20 are the heating plate 29 and the steam heating plate 24 so that the rice temperature in the pan 2 becomes uniform and the dew does not occur on the heating plate 29 and the side surface of the pan 2. Heat the side of the pan.

  In particular, the amount of power consumed in the heat retaining step is small enough that the amount of heat generated by each heating means is difficult to escape to the outside of the main body 1. The heat transfer from each heating means is carried out by three ways: heat conduction in the substance and by contact, radiation by radiant heat, and convection heat by gas. Here, in particular, the convective heat is transferred by the convection phenomenon by moving upward because the specific gravity of the hot gas is lighter. Since the heat around the bottom surface of the pan 2 or the side surface of the pan 2 convects upward, the upper frame 3 of the main body 1 has the highest temperature due to the influence of convective heat. Therefore, heat radiation to the outside due to convection heat is radiated through the upper surface of the upper frame 3. That is, the more the convective heat is transmitted to the upper surface of the upper frame 3, the smaller the amount of heat released to the outside and the lower the power consumption.

  According to the present embodiment, the main body heat insulating material 21 is disposed on the lower surface of the upper frame 3, and heat is not easily transmitted to the upper frame 3. As a result, the amount of heat released from the upper surface of the upper frame 3 is reduced, and in particular, the amount of power consumed during heat insulation is also reduced.

  Moreover, in the scene which complete | finishes heat insulation and takes out the pan 2 from the main body 1, although it will grab the flange part 2a of the pan 2, it is easy to touch the upper frame 3 near the flange part 2a. Here, since most of the rice remains in the pan 2 and is kept warm until just before, the upper surface of the upper frame 3 is also heated by heat due to the heat and is easy to touch when the pan 2 is taken out. According to the present embodiment, the temperature of the upper surface of the upper frame 3 is lower than that of the conventional case due to the main body heat insulating material 21, and even if it touches the upper frame 3, it does not feel hot.

  Here, in place of the side heater 20, a similar effect can be obtained in a system in which the side surface of the pan is directly induction heated by a side induction coil. In this case, it goes without saying that the protective frame body 5 is non-metallic.

  As described above, in the present embodiment, the main body heat insulating material prevents convective heat escaping upward, thereby improving the heat insulating property.In particular, while reducing the power consumption during heat insulation, the heat insulating action of the main body heat insulating material. Therefore, even if you touch the top of the main unit during use, it will not feel hot and can be used with confidence.

  In the present embodiment, the case where the main body heat insulating material 21 is disposed on the lower surface of the upper frame 3 has been described. However, instead of this, the main body heat insulating material 21 may be provided on the upper surface of the upper frame 3. It may be provided on the lower surface.

(Embodiment 2)
FIG. 4 illustrates a main part of an electromagnetic induction heating type jar rice cooker as a jar rice cooker according to Embodiment 2 of the present invention.

  As shown in the figure, in the jar rice cooker in the present embodiment, the upper surface of the upper frame 50 is covered with a main body cover 51. The main body heat insulating material 52 is provided between the upper frame 50 and the main body cover 51 with a slight gap 52a. Other configurations are the same as those in the first embodiment.

  In the above configuration, since the main body heat insulating material 52 is provided on the upper surface of the upper frame 50, a configuration for holding it so as not to drop is unnecessary. Further, at the time of assembling the main body, it is not necessary to set the main body heat insulating material 52 with the main body 1 turned upside down. That is, the assembly can be performed only by setting the main body cover 51 on the upper surface of the upper frame 50 after setting the main body heat insulating material 52 on the upper surface of the upper frame 50. In addition, the main body cover 51 constituting the upper surface of the main body can be provided with functions that cannot be imparted to various upper frames 50, such as antifouling, decoration, and magnetic shielding.

  As described above, in the present embodiment, it is possible to improve the assembling property while maintaining the same effect as that of the first embodiment, and to add antifouling, decoration, anti-magnetic and other functions to the upper surface of the main body.

(Embodiment 3)
FIG. 5 illustrates a main part of an electromagnetic induction heating type jar rice cooker as a jar rice cooker according to Embodiment 3 of the present invention.

  As shown in the figure, the jar rice cooker in the present embodiment is provided with an upper frame cover 61 on the upper surface of the upper frame 60 and a main body heat insulating material 62 on the surface of the upper frame cover 61 on the upper frame 60 side. It is. A gap 61 a is provided between the upper frame cover 61 and the main body heat insulating material 62.

  As a result, it is possible to give a heat insulating effect to the upper surface of the main body 1 simply by assembling the upper frame cover 61 at the time of assembly, and the assemblability is greatly improved. It is possible to add functions. In addition, the heat conduction to the upper surface of the main body 1 is suppressed by the action of the gap 61a and the main body heat insulating material 62. In particular, the power consumption during the heat insulation is more effectively reduced, and even if the upper surface of the main body 1 is touched during use. It can be used with confidence without feeling hot.

  The main body heat insulating material 62 is formed as a heat insulating layer integrated with the upper frame cover 61 by spraying and painting hollow glass beads having high heat insulating properties.

  Thereby, in addition to the above effects, the number of places where it can be installed is increased by using a heat insulating layer, and further heat conduction to the upper surface of the main body is suppressed, and in particular, power consumption during heat insulation can be reduced more effectively. . That is, there are foamed resin, glass wool, etc. as a heat insulating material, but the foamed resin needs a thickness of at least 1 to 2 mm or more in order to ensure heat insulation and moldability, and in a place where the thickness can be secured. Since it can only be installed as a heat insulating material, the place where it can be arranged was limited. Moreover, since glass wool etc. are unstable in shape, they can be arranged only in a flat plate shape, and the places where they can also be arranged as heat insulating materials are limited, and there is a limit to improving the heat insulating properties. However, by making the heat insulating layer integrated with the upper frame cover 61 by spray coating or the like, it is possible to provide heat insulation even to a portion that cannot have heat insulation.

  The upper frame cover 61 has a cylindrical portion 61b that faces the side surface of the pan 2.

  Thereby, in addition to a heat insulation layer effect | action, with the effect | action of the cylindrical part 61b, heat | fever becomes difficult to escape outside more and heat insulation electric energy can be reduced further.

  As described above, in this embodiment, in particular, the power consumption during heat insulation is reduced, and even if the top surface of the main body is touched during use, it does not feel hot and can be used with peace of mind. ing.

  In addition, in said each Embodiment 1-3, although the electromagnetic induction heating type jar rice cooker was demonstrated, even if it is a jar rice cooker using the sheathed heater which is other heat sources, gas, etc., it applies similarly. It can be done. In addition, the configurations in the first to third embodiments can be appropriately combined as necessary, and are not limited to the configurations of the respective embodiments.

  As described above, the jar rice cooker according to the present invention particularly reduces the amount of power consumption during heat retention, and does not feel hot even if it touches the top surface of the main body during use, so it can be used with peace of mind, so it can be used for ordinary homes or business use. Regardless, the heat source is not limited to electromagnetic induction heating and can be applied to jar rice cookers in general.

Sectional drawing of the jar rice cooker in Embodiment 1 of this invention Cross section of the main part of the jar rice cooker Sectional drawing of the lid part of the jar rice cooker Sectional drawing of the principal part of the jar rice cooker in Embodiment 2 of this invention. Sectional drawing of the principal part of the jar rice cooker in Embodiment 3 of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Main body 2 Pan 3, 50, 60 Upper frame 4 Body 7 Pan heating means 15 Lid body 21, 52, 62 Main body heat insulating material 21a, 52a, 61a Gap 51, 61 Upper frame cover 61b Cylindrical part

Claims (7)

A pan, a main body that detachably stores the pan, a pan heating means that heats the pan, and a lid that covers the upper surface of the main body so as to be freely opened and closed, and the main body includes an upper frame that constitutes the upper surface; The jar rice cooker which comprised the outer body with the body which comprises a side face and a bottom face with a bottomed cylindrical shape, and has disposed a main body heat insulating material on at least one of the upper and lower surfaces of the upper frame. The jar rice cooker according to claim 1, wherein an upper frame cover is provided on an upper surface of the upper frame, and a main body heat insulating material is disposed between the upper frame cover and the upper frame. The jar rice cooker of Claim 1 which provided the upper-frame cover in the upper surface of the upper frame, and provided the main body heat insulating material in the surface of the upper frame side of this upper-frame cover. The jar rice cooker of Claim 1 or 3 which provided the clearance gap between the main body heat insulating material and the upper frame. The jar rice cooker according to claim 2, wherein a gap is provided between the main body heat insulating material and the upper frame cover. The jar rice cooker according to claim 3, wherein the main body heat insulating material provided on the upper frame side surface of the upper frame cover is integrated with the upper frame cover as a heat insulating layer. The jar rice cooker according to claim 3 or 6, wherein the upper frame cover has a cylindrical portion facing the side surface of the pan.

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