JPS5846768Y2 - Thermal insulation structure of heat-retaining pots, etc. - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a heat insulating structure such as a heat-retaining pot having a structure in which a heat insulating material is interposed between an inner frame and an outer frame.

Conventionally, for example, in a heat-retaining pot, a heat insulating material is tightly filled and interposed between an inner frame that houses a rice-cooking pot and an outer frame that houses this inner frame. This prevents heat from escaping to the outside through the inner frame.

However, in the above conventional structure, as mentioned above, the insulation material is filled between the inner frame and the outer frame without any gap, so the outer surface of the inner frame and the inner surface of the insulation material are in close contact with each other. The heat was directly transferred to the insulation material through the inner frame, so even though insulation treatment was used, it was still not sufficient.

The present invention was developed in view of the above circumstances, and its purpose is to provide a heat-retaining pot that can further enhance the heat insulation effect and reduce the cost by reducing the thickness of the heat insulating material. To provide a heat insulating structure such as

An embodiment in which the present invention is applied to a heat-retaining pot will be described below with reference to the drawings.

First, in Fig. 1, 1 is an inner frame made of a material such as aluminum with good thermal conductivity and has a cylindrical shape with a bottom;
is an outer frame which also has a cylindrical shape with a bottom and houses this inner frame 1, and the upper end of the inner frame 1 is fixed to a decorative frame 3 fixed to the upper end of the outer frame 2.

Reference numeral 4 denotes a rice cooking pot detachably housed in the inner frame 1, and an appropriate space 5 is formed between the outer bottom of the pot 4 and the inner bottom of the inner frame 1.

6 is a heater disposed in the space 5, 7 is a magnetic body made of a magnetic shunt material, 8 is a permanent magnet, and 9 is an operating knob 9a at the tip.
It is a lever with a

On the other hand, reference numeral 10 denotes a handle made of synthetic resin, one end of which is pivotally supported on the outer frame 2 by a hinge pin 11 so as to be able to rotate up and down, while the other end is attached to the outer surface of the upper end of the outer frame 1. It is made to engage with a stop member 12 and can be released from its engagement by a push button 13.

Now, in FIG. 2, reference numeral 14 denotes a plurality of protrusions provided on the outer surface of the inner frame 1 integrally with the inner frame 1 by partially bulging outward. The protrusion 14 is formed to extend in length, and the height dimension A of the protrusion 14 is set within 10 mm.

15 is a cylindrical heat insulating material, which is attached to the outer frame 1 as shown in Figure 1.
and the inner frame 2, and the outer surface of the heat insulating material 15 is brought into close contact with the inner circumferential surface of the outer frame 1, while the inner surface is brought into contact with the outer end of each protrusion 14, so that the inner frame 1 and insulation material 15
An air layer 16 having a width corresponding to the height A of the protrusion 14, that is, within 10 mm, is formed between the protrusion 14 and the protrusion 14.

Further, in FIG. 3, reference numeral 17 denotes a plurality of protrusions that are integrally provided upwardly on the lower surface plate 10a of the handle 10, and the height dimension B of these protrusions 17 is also 1Q mm like the above-mentioned protrusion 14.
It is set within

Reference numeral 18 denotes a disc-shaped heat insulating material, which is interposed between the intermediate plate 10b below the hand-held portion of the handle 10 and the bottom plate 10a, and the upper surface of the heat insulating material 18 is brought into close contact with the lower surface of the intermediate plate 10b. , the lower surface is brought into contact with the upper end of each protrusion 17, thereby creating an air layer 19 between the lower plate 10a and the heat insulating material 18 having a width equivalent to the height B of the protrusion 17, that is, within 1Q mm. is forming.

In FIG. 1, reference numeral 20 denotes a lid that is locked to a locking portion 21 of the bottom plate 10a of the handle 10, which opens and closes the top opening of the pot 4 as the handle 10 rotates. 22 is a steam rear cylinder attached to the lid 20, and 23 is a through hole provided in the handle 10 to allow the steam rear cylinder 22 to pass through.

As described above, in this embodiment, the projection 14 provided on the outer surface of the inner frame 1 creates an air layer 16 between the inner frame 1 and the heat insulating material 15.
Therefore, the two layers of the air layer 16 and the heat insulating material 15 located between the inner frame 1 and the outer frame 2 effectively prevent heat from the inner frame 1 side from being transmitted to the outer frame 2 side. be able to.

In particular, the air layer 16, which has even better insulation properties, is
Since the heat insulating material 15 is formed on the side so that it does not come into direct contact with the inner frame 1, the high heat insulating properties of the air layer 16 can be effectively maintained, since the greater the temperature difference, the greater the amount of heat transfer. As a result, the heat transmitted from the inner frame 1 side to the heat insulating material 15 can be sufficiently reduced, so that the heat insulating material is in direct contact with the inner frame and the heat from the inner frame side is directly transmitted to the heat insulating material. The overall insulation properties can be significantly improved compared to the conventional one.

In addition, the heat insulating material 15 is generally made of a flexible foamed resin or the like with low rigidity, and the one-way frame 1 is made of a highly rigid metal or the like. Since it is provided in the inner frame 1 with high rigidity, even if the protrusion 14 is made extremely thin in order to minimize the contact area between the protrusion 14 and the heat insulating material 15, deformation of the protrusion 14 can be prevented. It is possible to reliably prevent the gap between the air layers 16 from being lost due to deformation, and to effectively achieve the intended purpose of reliably preventing the heat on the inner frame 1 side from being directly transmitted to the heat insulating material 15. .

Moreover, in this embodiment in which the protrusions 14 are formed to extend vertically, the inner frame 1 and the heat insulating material 15 are in line contact rather than in so-called surface contact, and therefore the heat insulation is better than in the case of surface contact. The effect can be further enhanced.

Furthermore, in this embodiment, although the heat insulation effect can be improved compared to the conventional one as described above, the projection 14
The thickness of the heat insulating material 15 can be made thinner by the amount corresponding to the height dimension A of the heat insulating material 15, and the cost can be made lower than in the past.

Moreover, in this embodiment in which the height dimension A of the protrusion 14 is set within 1Q mm, the width of the air layer 16 is as narrow as within 1Q mm, so that air convection within the air layer 16 This phenomenon does not occur, and the heat insulation effect can be further enhanced.

The effects of the protrusion 14 and the air layer 16 provided between the inner frame 1 and the outer frame 2 have been described above, but of course the effect of the protrusion 17 provided between the lower surface plate 10a of the handle 10 and the intermediate plate 10b is also explained.
．． The same applies to the air layer 19, and the heat insulating effect of this portion can be further enhanced, and the thickness of the heat insulating material 18 can also be made thinner.

The present invention is not limited to the embodiments described above and shown in the drawings, but can be widely applied to, for example, a rice cooker alone or a heat-retaining jar, and may be modified as appropriate without departing from the gist. It can be implemented by

As explained above, the present invention has an inner frame, an outer frame housing the inner frame, and a heat insulating material interposed between these, in which a protrusion is provided on the outer surface of the inner frame, and the protrusion It is characterized in that an air layer is formed between the inner frame and the heat insulating material, thereby increasing the heat insulating effect and ensuring the air layer between the inner frame and the heat insulating material. The purpose of the present invention is to provide a heat insulating structure for a thermos, etc., which has the valuable effect of being able to maintain a sufficient heat insulating effect by keeping the temperature of the heat insulating material at a low temperature, and also by making the wall thickness of the heat insulating material thinner, thereby reducing the price. .

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, in which Fig. 1 is an overall vertical sectional side view, Fig. 2 is an enlarged perspective view of the main parts of the inner frame and the heat insulating material,
FIG. 3 is an enlarged longitudinal sectional side view of the handle. In the figure, 1 is an inner frame, 2 is an outer frame, 4 is a pot, 10 is a handle, 14
is a protrusion, 15 is a heat insulating material, 16 is an air layer, 17 is a protrusion, 1
8 is a heat insulating material, and 19 is an air layer.

Claims (1)

[Scope of utility model registration request] In a device having an inner frame, an outer frame housing the inner frame, and a heat insulating material interposed between these, a protrusion is provided on the outer surface of the inner frame, and the protrusion creates a gap between the inner frame and the heat insulating material. A heat-insulating structure for a heat-retaining pot, etc., characterized by forming an air layer between the inner and outer walls.