JPH0670842A - Pot grooved on outside surface - Google Patents

Abstract

PURPOSE:To increase the heat transfer quantity extending from a flame and combustion gas to the pot. CONSTITUTION:On an outside bottom face part 2 of a pot 1, a radial groove 3 is provided, and on an outside side face part 4, a groove 5 in the vertical direction is provided, and its surface is painted in a blackish color.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pot used for cooking.

[0002]

[Prior Art] Conventionally, cooking pots and cans made of iron-based, aluminum-based, or copper-based materials with a smooth surface are formed, those that have been surface-treated with alumite or baking coating, and only the outer bottom surface of the pan. It is a spiral or concentric groove processed. There are also pots that have multiple layers of pot walls to improve the thermal conductivity of the material itself.

[0003]

The energy transmitted to the cooking pot and the medicine can is a part of the combustion energy, and most of the energy is dissipated into the atmosphere as useless energy. To reduce this dissipated energy as much as possible, in other words, to use more as cooking energy. The biggest obstacle to transferring more heat to the contents of the pot is not the thermal conductivity of the material of the pot or the heat transfer between the inner surface of the pot and the contents, but the outer surface of the pot. Heat transfer resistance with flame and high temperature combustion gas. It is considered that heat is transferred from the combustion gas to the outer bottom surface and the outer surface of the pan and the medicine can largely due to two methods. One is radiative heat transfer from flames and hot combustion gases, and the other is convective heat transfer from hot combustion gases. It is an object of the present invention to increase the two heat transfer amounts.

[0004]

[Means for Solving the Problems] A large number of radial grooves (3) extending from the center to the periphery are provided on the entire outer bottom surface portion (2) of the pan (1), and a large number of vertical directions are provided on the entire outer surface portion (4). Groove (5) is provided. The surfaces of the radial groove (3) and the vertical groove (5) are colored black.

[0005]

[Function] On the outer surface of the pot, the radial groove (3) and the vertical groove (5) formed in the gas flow direction serve as flow channel grooves that do not obstruct the flow of the high temperature combustion gas, thus lowering the surface heat transfer coefficient. At the same time, it is possible to increase the amount of convective heat transfer because the outer surface heat transfer area can be increased by the groove and the unevenness of the mountain. To increase the radiant heat absorption rate on the outer surface of the pot, black color can be used to increase the amount of radiant heat transfer from the flame and hot combustion gas.
These measures increase the effective use of combustion energy.

[0006]

EXAMPLE A groove having the same shape as the plurality of vertical grooves (5) on the outer surface portion shown in FIG. 2 is formed as a radial groove (3) on the outer bottom surface portion (2). It is best to make radial grooves (3) and vertical grooves (5) on the outer surface when making the pan, with the same material as the pan. Since the surface of the iron pot is black, it is not necessary to process the surface of the groove to a black color, but an aluminum pot etc. is processed to a black color by post-processing such as baking coating.

As shown in FIG. 3, when grooves are formed by post-processing, the same kind or different kinds of materials are built up on the outer surface to form radial grooves (3) and vertical grooves (5). A heat-resistant putty with good thermal conductivity is adhered to the outer surface of a smooth aluminum pan whose surface is anodized, and the outer bottom surface has a large number of grooves radiating from the center to the periphery, and the outer surface is vertical. A large number of grooves are formed on the surface, and black heat-resistant paint is applied to the surface of the heat-resistant putty or the like formed on the uneven grooves and the ridges.

Some pans are as shallow as a frying pan, and some are deep pans and cans. Depending on the shape of the pan, only one of the outer bottom surface and the outer surface may be grooved, and the surface may have a blackish color. As described above, as in the present embodiment, a large number of grooves are formed on the outer surface of the pot, and the surface is colored black so that the effective use of combustion energy is increased.

[0009]

Although the present invention is as described above, it has the following effects. As shown in the examples, in a pan made of aluminum having a low radiant heat absorption rate, putty is put up on the surface by post-processing, groove processing is applied to the surface, and a black paint is applied to the surface to obtain about 11%. It is possible to measure the increase in heat transfer of combustion energy. It can be estimated that the amount of heat transfer can be further increased by optimizing the shape, material, and depth of the groove on the outer surface of the pan.

[Brief description of drawings]

FIG. 1 is a perspective view of the present invention seen from below.

FIG. 2 is a sectional view taken along line AA of the present invention.

FIG. 3 is a cross-sectional view taken along line AA showing an example of post-processing of the present invention.

[Explanation of symbols]

 1 pan 2 outer bottom surface part 3 radial groove 4 outer side surface part 5 vertical groove

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[Procedure amendment]

[Submission date] October 12, 1993

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] 0005

[Correction method] Change

[Correction content]

[0005]

[Function] A large number of radial grooves (3) formed on the outer bottom surface of the pot and a large number of vertical grooves (5) formed on the outer surface serve as flow path grooves that do not obstruct the flow of the hot combustion gas, and thus surface heat transfer. At the same time as preventing the coefficient from lowering, the convection heat transfer amount can be increased because the outer surface heat transfer area can be increased by the unevenness of the groove and the crest.
To increase the radiant heat absorption rate on the outer surface of the pot, black color can be used to increase the amount of radiant heat transfer from the flame and hot combustion gas. These measures increase the effective use of combustion energy.

[Procedure Amendment 2]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 1

[Correction method] Change

[Correction content]

[Figure 1]

Claims (2)

[Claims] 1. A pot having a groove on its outer surface, wherein a radial groove (3) is provided on an outer bottom surface portion (2) of the pan (1) and a vertical groove (5) is provided on an outer surface portion (4). . 2. The pot with grooves on the outer surface according to claim 1, wherein the surfaces of the radial grooves (3) and the grooves (5) in the vertical direction have a blackish color.