JPS5851845Y2 - Heat retention electric rice cooker - Google Patents

Description

[Detailed description of the invention] The present invention relates to a heat-retaining electric rice cooker such as a so-called electric jar rice cooker, and in particular, a heat-resistant resin coating is applied to the top surface of the heat-retaining lid that covers the opening of the outer pot that houses the inner pot. This is what I did.

A heat-retaining electric rice cooker like a general electric jar rice cooker consists of an outer pot that houses the inner pot, an inner lid that covers the inner pot, a heat-retaining lid that is located on the top surface of the inner pot and covers the outer pot, and a heat-retaining lid that covers the outer pot. It has a triple-layered lid structure consisting of an outer lid located on the top surface of the heat-insulating lid and pivoted on one side to a frame so that it can be opened and closed. It is designed to be heated from the top using hot air.

However, since both the inner lid and the heat-insulating lid are made of a material having good heat conductivity, such as aluminum, in order to effectively transfer heat from the heat source, the heat is dissipated to the outside from the top surface of the heat-insulating lid. They generate a lot of heat, and especially those that do not have a heat-retaining heater in their lids have the drawback of insufficient heating from the top, resulting in uneven temperature of the rice.

In addition, due to the heat dissipation to the outside as described above, the resin back plate or other friction members attached to the back surface of the outer lid become hot and deform due to heat.

Furthermore, even in a double-lid configuration consisting of a heat-retaining lid that covers the inner pot and an outer lid that covers the outer pot, there is similarly a large amount of heat dissipated from the top surface of the heat-retaining lid, making it impossible to maintain the optimum heat-retaining temperature.

The present invention has been developed in view of the above-mentioned drawbacks, and will be explained with reference to the drawings below. 1 is a cylindrical frame; 2 is a bottomed cylinder made of a material with good thermal conductivity attached to the frame 1 with a heat insulating material 3 interposed therebetween; 4 is a ring-shaped pot fixed to the inner bottom of the outer pot 2; 5 is an inner pot which can be stored in the outer pot 2 and whose bottom part is placed on the pot 4 when stored; A flange 6 extending outward is formed on the periphery.

Reference numeral 7 denotes an inner lid that covers the opening of the inner pot 5, and has a knob 8 fixed thereto projecting upwardly in the center thereof, and a plurality of steam holes 9, 9 formed around the knob 8.

Reference numeral 10 denotes a frame cover made of heat-resistant synthetic resin that fits and secures the upper circumferential edge of the outer pot 2 and the upper circumferential edge of the frame 1, and 11 indicates a heat-conducting frame cover fixed between the upper circumferential edge of the outer pot and the upper surface of the frame cover 10. A good ring-shaped heat transfer plate, 12 is a side heater that is in close contact with the outer wall of the upper periphery of the outer pot 2, and 13 is located on the upper surface of the inner lid 7, and the outer periphery is connected to the inner lid T and the inner pot. 5 is a heat-insulating lid made of a material with good thermal conductivity and placed on the heat transfer plate 11, extending beyond the placement part with the flange 6 of 5. As shown in FIG. A heat-resistant resin coating 14 is applied.

Reference numeral 15 is located on the upper surface of the heat insulating lid 13, and one side is pivoted to the frame 1 so that it can be opened and closed freely, and the other side is attached to the frame 1.
The outer lid can be hung freely on the upper and lower synthetic resin plates 16.1.
A heat insulating material 18 is interposed between the holes 7 and 7.

19 fits into the knob 8 and connects its outer periphery to the steam hole 9.
, 9, and an elastic body 20 that is brought into close contact with the upper surface of the inner lid 7.
21 is an elastic fitting body fitted into the center part of the heat-insulating lid 13;
is a pressure locking mechanism provided at the center of the back surface of the outer lid 15,
It is composed of a suppressing plate 22 that presses the head of the knob 8 and a U-pushing metal fitting 24 into which an elastic engagement body 23 is fitted in the center.

Reference numeral 25 denotes a steam venting device 26 which is fixed to a proper position of the heat insulating lid 13 in a protruding manner and communicated with the outside air through the outer lid 15;
27 is a rice-cooking thermostat installed in the center of the silent portion 4 and energized so as to project upward at all times; 27 is a switch lever connected to the rice-cooking thermostat 26VC; 28
is a back cover that also serves as a support leg and is fitted and fixed to the lower part of the frame 1.

Next, to describe the operation, first, when the knob 8 of the inner lid 7 is engaged with the elastic engagement body 23 of the pressure locking mechanism 21 via the elastic fitting body 20 of the heat retention lid 13, the inner lid 7 and the heat retention lid 13 and the outer lid 15 are integrated, and the inner lid 7 and the heat insulation lid 1 are integrated.
3 is pressed downward by the pressing plate 22 and the pressing fitting 24, the outer peripheral edge of the inner lid 7 is brought into close contact with the flange 6 of the inner pot 5, and the heat insulating lid 13 is brought into close contact with the heat transfer plate 11.

On the other hand, at this time, the surface of the resin coating 14 of the heat-retaining lid 13 faces the back surface of the outer lid 15, and forms a space S between the heat-retaining lid 13 and the inner lid 7, the outer periphery of which is open.

Then, the inner pot 5 is stored inside the outer pot 2, and the bottom is silently placed 4.
There is a gap t between the outer wall of the L1 pot 5 and the inner wall of the outer pot 2.
form.

When cooking rice, operate the switch lever 27 to turn the rice cooking thermostat 26 into a ONL heating plate that silently heats the inner pot 5.
heat up.

At this time, the hot air rising through the gap t enters the gap S as indicated by the arrow in FIG.

As the rice cooking progresses, the steam flowing out through the steam holes 9, 9 displaces the elastic body 19 due to its pressure, enters the space S, and is discharged into the outside air from the steam venting device 25 together with the aforementioned hot air. .

At this time, the heat insulating lid 13 and the inner lid 7 become quite high in temperature, and this heat acts as if dissipated into the space between the back surfaces of the insulating lid 13 and the outer lid 15, which have a relatively low temperature, but the upper surface of the insulating lid 13 The resin coating 14 provided on the surface provides a heat insulating effect and minimizes heat dissipation.

The rice-cooking thermostat 26 senses the rapid temperature rise in the inner pot 5 as the rice is cooked, and operates a built-in contact (not shown) to silently reduce the amount of heat generated in the inner pot 5 and to turn on the side heater 12. Electricity is supplied to heat the outer pot 2, and the inner pot 5 is heated from the side surface through the gap t.

At this time, the heat from the side heater 12 is transferred to the heat insulation lid 13 via the heat transfer plate 11, heating the heat insulation lid 13 and also heating the inner lid 7 through the space S as the heat insulation lid 13 is heated. Heat to heat the upper surface of the inner pot 5.

Therefore, the bottom of the inner pot 5 is silently heated by the inner pot 4, the side part is heated by the heat from the space t by the side heater 12, and the upper part is heated by the heat from the space S by the side heater 12, so that the inner pot 5 is kept warm.

However, even during heat retention, the heat retention lid 13 is heated by the side heater 12 and reaches a high temperature even though the temperature does not reach the high temperature during rice cooking, but the resin coating 14 suppresses heat dissipation toward the outer lid 15 side.

The present invention has a so-called triple-lid structure consisting of an inner lid that covers the inner pot, a heat-insulating lid that covers the outer pot, and an outer lid that covers the inner and heat-insulating lids. The same applies to a double-lid structure in which the outer periphery of the heat-insulating lid is placed on top of an outer pot equipped with a side heater.

7! A heat exchanger plate was installed for the purpose of uniformly heating the sides of the inner pot! J:.

The heat exchanger plate is not necessarily required, and the heat-insulating lid may be placed on seven lunges formed by bending the upper peripheral edge of the outer pot and extending it outward.

As described above, the present invention has an outer pot, an inner pot, a heat-retaining lid with good heat conduction that covers the inner pot or the outer pot, and an outer cover. However, since a heat-resistant resin coating is applied to the upper surface of the heat-retaining lid, this resin coating creates an insulating effect on the upper surface of the heat-retaining lid, minimizing heat dissipation toward the outer lid, and also making it possible to minimize heat dissipation toward the outer lid. The disadvantage that heat deformation of the outer cover due to reduced heat transfer to the sides is eliminated.

In other words, the resin coating reduces the aforementioned heat dissipation, keeps the inner pot at an optimal temperature at all times, eliminates unevenness in the temperature of the rice, facilitates cleaning of the heat-insulating lid, and reduces the thermal influence of various parts on the outer lid side. This has the advantage of being able to reduce the amount of water used.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of the heat-retaining electric rice cooker of the present invention, and FIG. 2 is a sectional view of the main parts. 1...Frame 2...Outer pot, 3...
...insulation, 4...silence, 5...
Inner pot, 13...Heat insulation lid, 14...Resin coating.

Claims (1)

[Scope of utility model registration request] a frame, an outer pot attached to the frame with a heat insulating material interposed therebetween, an inner pot fixed to the inner bottom of the outer pot, and an inner pot that can be freely stored in the outer pot; A heat-retaining type comprising a heat-retaining lid with good heat conduction that covers a pot, and an outer lid located on the top surface of the heat-retaining lid, and characterized in that a heat-resistant resin coating is applied to the top surface of the heat-retaining lid. Electric rice cooker.