JP3551107B2 - Insulated container - Google Patents

Description

[0002]
TECHNICAL FIELD OF THE INVENTION
[0003]
The present invention relates to a heat retaining container such as an electric rice cooker, and more particularly to a structure of a lid in the heat retaining container.
[Prior art]
[0004]
The lid of a well-known heat-insulating container (for example, an electric rice cooker) is formed by joining an upper plate and a lower plate made of a synthetic resin at an outer peripheral portion by high frequency welding or the like, and joining the upper plate and the lower plate. The heat insulating cover has been configured such that a heat insulating material is disposed in a space formed therebetween.
[Problems to be solved by the invention]
[0005]
In the case of the lid having the above configuration, the heat insulation effect is insufficient, and the lid can be washed, but cannot be disassembled. Therefore, there is a hygiene problem when water or the like enters the inside.
[0006]
By the way, in recent years, a structure has been developed in which the lid is constituted by a synthetic resin upper plate forming the upper surface and a vacuum double structure forming the lower surface to improve the heat insulating effect. However, in this case, it is necessary to obtain a vacuum state in a vacuum furnace, which increases the processing cost and reduces the thickness of the plate to prevent deformation of the metal plate that forms the vacuum structure from the point where the vacuum state is established. It was necessary to make it thicker and to have a shape for preventing deformation. Also in this case, depending on the mounting state of the vacuum structure, there is a problem in cleaning the inside of the lid.
[0007]
The present invention has been made in view of the above points, and by using a detachable heat insulating structure as a component of the lid, the heat insulating effect is ensured, and the heat insulating structure can be easily cleaned. It is intended to do so.
[Means for Solving the Problems]
[0008]
In the present invention, as means for solving the above problems, a container body having an inner container, the insulated container with a lid of the container body, the lid, on the synthetic resin for forming the upper surface A screw cylinder having an external thread is provided at a substantially central portion of the upper plate, the plate and a heat insulating structure having a lower surface formed therein and containing a heat insulating material inside a sealed outer shell. A screw ring is screwed onto the screw cylinder in a state where the center of the heat insulating structure is inserted into the screw cylinder, thereby making the heat insulating structure detachable from the upper plate. A pressure adjusting cylinder having a heat radiating plate at the lower end is detachably mounted inside the cylinder .
[0009]
With the configuration described above, the heat insulating effect of the lid can be ensured by the heat insulating structure, and by disassembling the lid into the upper plate and the heat insulating structure , the inside of the lid is, of course, insulated. The structure can be washed as a whole, which is preferable for hygiene. Moreover, if the sealing-shaped formed by housing the heat insulating material on the inner portion of the outer shell insulating structure, it is possible to thin the outer shell than in vacuum double structure, to reduce the processing cost be able to. Further, the upper plate and the heat insulating structure can be easily assembled and disassembled by screwing the screw ring on and off. Further, the attachment and detachment of the pressure adjusting cylinder and the heat sink can be performed simultaneously.
BEST MODE FOR CARRYING OUT THE INVENTION
[0010]
Hereinafter, some preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.
[0011]
First Embodiment FIGS. 1 to 3 show an electric rice cooker which is an example of a heat retaining container according to a first embodiment of the present invention.
[0012]
As shown in FIG. 1, this electric rice cooker has an outer case 4 forming an outer peripheral surface and an inner peripheral surface, and can accommodate an inner container (hereinafter referred to as a rice cooker) 5 made of a magnetic material. (Hereinafter, referred to as a rice cooker main body) 1 comprising a synthetic resin protective frame 6, a lid 2 of the rice cooker main body 1 , and an outer peripheral side of the protective frame 6. An electromagnetic induction coil 3 acting as a heating means for heating the rice cooker 5 is provided.
[0013]
The outer case 4 includes a body 4 a serving as a side peripheral surface of the rice cooker main body 1, a shoulder 4 b serving as a joint between an upper end edge of the protection frame 6, and a bottom serving as a bottom of the rice cooker main body 1. 4c, in the present embodiment, the body 4a and the shoulder 4b are formed of a synthetic resin integrally molded product, and the bottom 4c is formed separately. In some cases, the body 4a and the bottom 4c are formed of an integrally molded product made of synthetic resin, and the shoulder 4b is formed separately.
[0014]
The upper part on the front side of the body part 4a of the outer case 4 is gently inclined, and an operation panel part 7 is provided at the part. Therefore, a relatively large front space portion is formed below the operation panel portion 7 between the outer case 4 and the protection frame 5. The operation panel unit 7 is provided with various operation switches and a liquid crystal display unit that displays a setting state set by the various operation switches.
[0015]
The protective frame 6 has a cylindrical shape with a bottom, and has a gentle curved surface 6c from the side peripheral surface 6a to the bottom surface 6b.
[0016]
On the back surface of the bottom surface 6b and the back surface of the curved surface 6c of the protection frame 6, annular electromagnetic induction coils 3, 3 are provided, respectively. The electromagnetic induction coils 3 and 3 are positioned on the lower surface of the central portion of the bottom surface 6b of the protective frame 6 while being sandwiched between the coil die 8 and the protective frame 6 extending radially along the protective frame 6. . That is, the electromagnetic induction coils 3 and 3 are shaped to follow the shape of the outer peripheral surface of the protection frame 6. Reference numeral 9 denotes a center sensor acting as a temperature detecting means for detecting the temperature of the rice cooker 5, and reference numeral 10 denotes a heat retaining heater.
[0017]
A synthetic resin shoulder ring 11 is attached to the inner peripheral edge of the shoulder portion 4b of the outer case 4 by forcible fitting, and a metal heater ring having a shoulder heater 12 is provided on the upper surface of the shoulder ring 11. 13 is attached. As will be described later, the outer peripheral edge of the heat radiating plate 14 attached to the lower surface of the lid 2 is pressed against the upper surface of the heater ring 13 when the lid 2 is closed.
[0018]
On the other hand, the lid 2 is pivotally supported so as to be openable / closable and detachable via a hinge unit 15 with respect to a rear portion of the outer case shoulder 4b (that is, the side opposite to the operation panel 7). And a heat insulating structure 17 forming a lower surface.
[0019]
As shown in FIGS. 2 and 3, an opening 19 into which a pressure adjustment cap 18 described later is removably inserted is formed at a substantially central portion of the upper plate 16. A screw cylinder 20 having an outer thread 20a on the outer periphery is integrally attached by high frequency welding.
[0020]
The heat insulating structure 17 includes a heat insulating material 24 inside a sealed outer shell 23 made of two upper and lower donut-shaped metal plates (for example, stainless steel plates) 21 and 22 whose inner and outer peripheral sides are joined to each other. It is configured to house. The heat insulating material 24 is made of, for example, polyurethane foam, and is injected and filled in the outer shell 23.
[0021]
In addition, as shown in FIG. 4, as the heat insulating material 24, a material obtained by filling urethane 26 in an aluminum foil 25 by a vacuum packing method can be adopted. Further, a heat storage material (for example, a material mainly composed of calcium chloride hexahydrate or sodium acetate trihydrate) may be used instead of urethane. In the case of calcium chloride hexahydrate as a main component, the melting point is 29 ° C., the heat of fusion is 45 kcal / kg, the operating temperature range is 20 ° C. to 32 ° C., and in the case of sodium acetate trihydrate as a main component. , Melting point: 58 ° C, heat of fusion: 54 kcal / kg, and operating temperature range: 45 ° C to 70 ° C. In this case, the heat storage effect of the heat storage material further enhances the heat retaining performance of the lid.
[0022]
By the way, since the heat insulating structure 17 is configured by housing the heat insulating material 24 in the outer shell 23, for example, the shape of the upper metal plate 21 is not restricted for maintaining strength. Therefore, as in the present embodiment, the upper metal plate 21 can have a shape corresponding to the inner surface shape of the upper plate 16.
[0023]
The inner peripheral side joining portion 23 a of the outer shell 23 is covered with a seal member 27 and is inserted into the outer periphery of the screw cylinder 20.
[0024]
At a position from the outer periphery of the lower metal plate 22 constituting the outer shell 23, a vertical wall portion 22a which secures strength and serves as a contact portion of a seal packing 28 described later is formed.
[0025]
The heat insulating structure 17 is attached by screwing a screw ring 29 having an internal screw 29a into the screw cylinder 20 in a state where the screw cylinder 20 is inserted into the inner peripheral joint portion 17a and tightened up. ing. That is, the heat insulating structure 17 is detachable from the upper plate 16 by screwing the screw ring 29 on and off.
[0026]
A pressure adjusting cylinder 30 is detachably mounted in the screw cylinder 20, and the upper part of the pressure adjusting cylinder 30 is covered by a pressure adjusting cap 18 detachably fitted in the opening 19. ing. The pressure adjusting cap 18 includes a cap body 31 having a cylindrical portion 31 a fitted into the opening 19, and a cover member 32 attached to cover the upper surface of the cap body 31. A thin aluminum plate 33 subjected to Sumiflon processing is attached to the upper surface of the substrate. Reference numeral 34 denotes a steam inlet to the pressure control cylinder 30, 35 denotes a steam outlet from the pressure control cylinder 30, 36 denotes a steam discharge port in the pressure control cap 18, 37 denotes a ball valve, and 38 denotes an outer periphery of the pressure control cylinder 30. Seal packing 39, a seal packing attached to the outer periphery of the cylindrical portion 31a of the cap body 31 of the pressure adjusting cap 18, and 40 an inner seal of the screw cylinder 20 to lock the seal packing 38 of the pressure adjusting cylinder 30. It is a projecting annular projection. In this way, even if oneva or the like overflows from the steam outlet 35 of the pressure regulating cylinder 30, it is returned downward without overflowing from the steam outlet 36 of the pressure regulating cap 18, and a sense of quality can be obtained. it can. In addition, since the upper surface of the pressure adjusting cap 18 is covered with the aluminum thin plate 33 processed with Sumiflon, maintenance is simplified.
[0027]
At the lower end of the pressure regulating cylinder 30, a heat radiating plate 14 whose outer peripheral edge is pressed against the upper surface of the heater ring 13 when the lid 2 is closed is attached by a rivet 41. The radiator plate 14 is made of a thermally conductive metal and is heated by heat conduction from the shoulder heater 12 attached to the heater ring 13. At the lower end of the pressure regulating cylinder 30, a projection 42 penetrating through the heat sink 14 is integrally provided. The projection 42 has a be brought into contact with the upper surface of該飯device cover 49 during the swinging of the rice device lid 49 to be described later. In this case, when the lid 2 is opened and closed, the rice cooker 49 swings around the seal packing 50, and the outer peripheral edge of the rice cooker 49 may come into contact with the heat sink 14 to generate a metallic sound. Since the projection 42 protruding from the pressure adjusting cylinder 30 comes into contact with the rice cooker lid 49 first, the outer peripheral end of the rice cooker lid 49 does not contact the heat sink 14.
[0028]
An upwardly bent rising portion 14a is formed at a position near the outer periphery of the heat radiating plate 14, and an upper end of the rising portion 14a extends toward the outer peripheral end so as to contact the heater ring 13. The contact portion 14b extends integrally. The rising portion 14a is integrally formed with a locking projection 14c having an upper and lower middle portion projecting outward. The inside of the locking projection 14c is a locking recess 14d.
[0029]
A seal packing 43 that seals the opening of the rice cooker 5 when the lid 2 is closed is attached to the locking projection 14 c by a packing ring 44. In addition, an attachment ring 46 for attaching a seal packing 45, which is pressed against the vertical wall portion 22a of the lower metal plate 22 of the outer shell body 23 and seals the space between the engagement recess 14d and the heat radiating plate 14, is impossible. It is fixed by fitting. That is, the seal packing 43 that seals between the opening of the rice cooker 5 and the seal packing 45 that seals between the heat insulating structure 17 are attached so as to sandwich the rising portion 14a. Reference numeral 47 denotes a steam port formed in the heat sink 14.
[0030]
A support rod 48 is provided at the center of the heat sink 14, and a rice cooker 49 is detachably attached to the support rod 48 via a seal packing 50. The rice cooker lid 49 is made of a thermally conductive metal having a diameter slightly smaller than the opening diameter of the rice cooker 5, and is positioned slightly below the opening edge of the rice cooker 5 when the lid 2 is closed. It has become. In this way, the heat from the shoulder heater 12 is transmitted to the heat radiating plate 14 via the heater ring 13, and the radiant heat from the heat radiating plate 14 is indirectly transmitted through the space between the rice cooker lid 49. This is transmitted to the rice cooker lid 49, and is further radiated from the rice cooker lid 49 to the cooked rice in the rice cooker 5. Therefore, the cooked rice is uniformly and softly heated, so that it is possible to appropriately keep the temperature of the cooked rice without causing browning or the like. Reference numeral 51 denotes a steam port formed in the rice cooker lid 49.
[0031]
In FIG. 1, reference numeral 52 denotes a carrying handle, 53 denotes a lock mechanism for holding the lid 2 in a closed state, 54 denotes a fan for cooling a rice cooker, and 55 denotes a fan for cooling electronic components.
[0032]
In the electric rice cooker configured as described above, the following operational effects can be obtained.
[0033]
After removing the lid 2 of the electric rice cooker from the rice cooker main body 1, as shown in FIG. 3, the heat sink 14 is removed from the lid 2, and the screw ring 29 is screwed off from the screw cylinder 20. The heat insulating structure 17 is removed. In addition, the rice cooker lid 49 is removed from the radiator plate 14, and the pressure adjusting cap 18 is also removed from the upper plate 16. Therefore, the lid 2 is disassembled into the upper plate 16 and the heat insulating structure 17, and the radiator plate 14, the rice cooker 49, and the pressure regulating cap 18 can be separated, and the inside can be cleaned at the time of cleaning. That is, the inside of the lid 2 can be always kept clean. Moreover, the heat insulating structure 17, because it is composed by housing the heat insulating material 24 in a sealed-shaped outer shell 23 can also wash their Re itself.
[0034]
Further, since the heat sink 14 is provided with the seal packing 45 for sealing between the heat sink 14 and the heat insulating structure 17, escape of hot air or steam from between the heat sink 14 and the heat insulating structure 17 to the upper plate 16 side is prevented. Can be prevented.
[0035]
The embodiment Figure 5 of the second embodiment, the electric rice cooker is shown as an example of a heat insulating container according to the second embodiment of the present invention.
[0036]
In this case, an annular notch 62 is formed in the upper plate 16 constituting the lid 2, and the upper surface of the outer shell 23 of the heat insulating structure 17 faces the notch 62. A part is constituted by the heat insulating structure 17. In this way, the weight of the lid 2 and the design can be improved. The other configuration and operation and effect are the same as those in the first embodiment, and thus the description is omitted.
[0037]
Third Embodiment FIGS. 6 and 7 show a heat insulating structure in an electric rice cooker which is an example of a heat retaining container according to a third embodiment of the present invention.
[0038]
In this case, the upper metal plate 21 (or the upper synthetic resin plate 57) constituting the outer shell 23 of the heat insulating structure 17 is provided with radial grooves 63 at predetermined intervals (for example, 90 ° intervals) in the circumferential direction. , 63... Are formed. By doing so, the rigidity of the upper metal plate 21 (or the upper synthetic resin plate 57) in the outer shell 23 increases, and the outer metal plate 21 is less likely to be deformed. Are formed on the upper plate 16 of the lid 2, for example, by forming convex ribs corresponding to the concave grooves 63, 63,. , 63.. Can be used as means for positioning with the upper plate 16. The other configuration and operation and effect are the same as those in the first embodiment, and thus the description is omitted.
[0039]
In each of the above embodiments, an electric rice cooker has been described as an example, but the present invention is also applicable to a device dedicated to heat retention.
[0040]
In each of the above embodiments, the electromagnetic induction coil is used as the heating means. However, the present invention is, of course, applicable to an electric heater using the heating means.
【The invention's effect】
[0041]
According to the present invention, a container body having an inner container, and a thermal insulation container provided with a lid of the container main body, wherein the lid is formed of a synthetic resin upper plate forming an upper surface, and a lower surface formed. wherein together constituted by a closed shape into the outer shell is formed by housing the heat insulating material insulating structure, the substantially central portion of the upper plate, with respect to and the screw cylinder provided with a screw cylinder having an external thread By screwing a screw ring to the screw cylinder with the center of the heat insulating structure inserted, the heat insulating structure can be detachably attached to the upper plate. The heat insulation effect can be secured , and by disassembling the lid into an upper plate and a heat insulating structure , not only the inside of the lid but also the heat insulating structure can be washed as a whole, and the effect of being hygienic is preferable. is there. Moreover, there Do can be a thin outer shell in comparison with the vacuum double structure Runode, also an effect that wear machining costs low reduced. There is also an effect that the upper plate and the heat insulating structure can be easily assembled and disassembled by screwing the screw ring. In addition, since the pressure adjusting cylinder having a heat radiating plate at the lower end is detachably mounted in the screw cylinder, there is an effect that the pressure adjusting cylinder and the heat radiating plate can be simultaneously attached and detached.
[Brief description of the drawings]
[0042]
FIG. 1 is a longitudinal sectional view of an electric rice cooker as an example of a heat retaining container according to a first embodiment of the present invention.
FIG. 2 is an enlarged cross-sectional view of a lid of the electric rice cooker as an example of the heat retaining container according to the first embodiment of the present invention.
FIG. 3 is an exploded enlarged sectional view of a lid of the electric rice cooker as an example of the heat retaining container according to the first embodiment of the present invention.
FIG. 4 is an enlarged cross-sectional view showing a modification of the lid of the electric rice cooker as an example of the heat retaining container according to the first embodiment of the present invention.
FIG. 5 is a perspective view of an electric rice cooker as an example of a heat retaining container according to a second embodiment of the present invention.
FIG. 6 is a plan view of a heat insulating structure in an electric rice cooker as an example of a heat retaining container according to a third embodiment of the present invention.
FIG. 7 is a sectional view taken along line VII- VII of FIG. 6 ;
[Explanation of symbols]
[0043]
1 is a container main body (rice cooker main body), 2 is a lid, 5 is an inner container (rice cooker), 12 is a shoulder heater, 14 is a heat sink, 16 is an upper plate, 17 is a heat insulating structure, 20 is a screw cylinder, 20a is an external screw, 23 is an outer shell, 24 is a heat insulating material, and 30 is a pressure regulating cylinder .

Claims (1)

A heat insulation container comprising a container body having an inner container, and a lid body of the container body, wherein the lid body is formed of a synthetic resin upper plate forming an upper surface, and a lower surface formed in a closed outer shape. together constituting a heat insulating structure inside is formed by housing the insulation shell, said substantially central portion of the upper plate, the insulating structure with respect to the provided and the screw cylinder screw cylinder having an outer thread By screwing a screw ring to the screw cylinder with the center part of the screw tube inserted, the heat insulating structure can be detachably attached to the upper plate, while the screw cylinder has a heat radiating plate at the lower end. A heat insulation container characterized in that a pressure adjustment cylinder is detachably attached .

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