JP-7857069-B1 - Heating device and method for manufacturing the same

Abstract

[Problem] To provide a heating device that can reduce the amount of heat required to heat to a target temperature, shorten the heating time, and reduce CO2 emissions. To provide a manufacturing method for more efficiently producing the said heating device. [Solution] A heating device 1 having a magnetized functional material layer 2 formed on the heat transfer surface 40 of a heat transfer base 4 by mixing tourmaline powder 30 and non-magnetic material powder 31. The heating device 1 having a functional material layer 2 in which the content of magnetic powder 31, which is obtained by magnetizing the non-magnetic material powder 31, is 1 wt% or more and 50 wt% or less. The heating device 1 having a plurality of scattered convex layers 20 of the functional material layer 2. The heating device 1 having a plurality of recesses 41 provided on the heat transfer surface 40, in which embedded layers 21 made of the functional material layer 2 are provided. A method for manufacturing a heating device 1 having a mixing step of mixing tourmaline powder 30 and non-magnetic material powder 31 to make a mixed powder 3, a molding step of forming the mixed powder 3 on the heat transfer surface 40 of a heat transfer base 4 to make a functional material layer 2, and a magnetization step of magnetizing the non-magnetic material powder 31. [Selection Diagram] Figure 1

Inventors

• 佐 藤 博

Assignees

• 佐 藤 博

Dates

Publication Date

20260512

Application Date

20251223

Claims (7)

1. A method for manufacturing a heating device, comprising laminating a layer of mixed powder, which is made by mixing tourmaline powder and non-magnetic material powder, onto a heat transfer substrate, and then providing a magnetized functional material layer after lamination.
2. The method for manufacturing a heating device according to claim 1, wherein the functional material layer contains 1 wt% or more and 50 wt% or less of magnetic powder obtained by magnetizing unmagnetic material powder.
3. The method for manufacturing a heating device according to claim 1, wherein the functional material layer is a plurality of convex layers scattered at intervals.
4. The method for manufacturing a heating device according to claim 1, wherein the mixed powder is provided on a heat transfer surface of a heat transfer substrate for heating an object, the heat transfer surface is provided with a plurality of recesses, and an embedded layer made of the functional material layer is provided in the recesses.
5. The method for manufacturing a heating device according to claim 1, wherein the mixed powder is provided on a heat transfer surface of a heat transfer substrate for heating an object, the heat transfer surface is provided with a plurality of protrusions, and a continuous coating layer made of the functional material layer is provided in the area including the protrusions on the heat transfer surface.
6. The method for manufacturing a heating device according to claim 1, wherein the mixed powder is provided on a heat transfer surface of a heat transfer substrate for heating an object, the heat transfer surface is provided with a plurality of protrusions, and a mesh-like coating layer made of the functional material layer is provided in the area remaining over the protrusions of the heat transfer surface.
7. A mixing process in which tourmaline powder and non-magnetic material powder are mixed to form a mixed powder, A molding step in which the mixed powder is molded onto the heat transfer surface of a heat transfer substrate to form a functional material layer, A method for manufacturing a heating device, comprising a magnetization step of magnetizing the aforementioned non-magnetic material powder.

Description

This invention relates to heat transfer technology for transferring heat to substances such as gases, liquids, and solids, and more particularly to a heating device with enhanced functionality for more efficiently heating the target object, and a method for manufacturing the same. The present inventors have developed a method for producing a composite material consisting of tourmaline and magnets, a composite material obtained by this method, and composite materials used therein, which eliminates the tendency for the tourmaline powder to be repelled by the magnetic material. This method involves laminating and integrating the tourmaline powder onto the surface of an unmagnetized magnetic material, which is formed into a flat plate or lump by homogeneously mixing and solidifying unmagnetized magnetic material powder as shown in Patent Document 1 (Japanese Patent Publication No. 4565476), or by homogeneously mixing and stirring the tourmaline powder with the unmagnetized magnetic material powder, and then combining and integrating it to form a homogeneous mixed structure. The unmagnetized magnetic material side of the molded body is then magnetized by handling the unmagnetized magnetic material powder while it remains unmagnetized, and then magnetizing the entire structure by means of appropriate solidification or coagulation. The inventors have continued to conduct research for many years since the initial development, aiming for the effective utilization of the composite material consisting of the tourmaline and magnet, and have particularly sought to apply it to technologies for reducing CO2 emissions, which are considered to be the cause of the abnormal weather that has become a serious problem in recent years. The inventors focused on technologies to reduce CO2 emissions from the use of electricity and gas generated when eating out, preparing meals, and eating at home. Various cooking utensils used for heating, such as frying pans, pots, stockpots, and rice cooker inner pots, are developed and offered with special coatings such as fluorine, platinum, diamond, and titanium applied to the surface of metals like iron, stainless steel, and aluminum, to prevent food from sticking during cooking and to make them easy to clean after use. For example, a cooking appliance is known, as shown in Patent Document 2 (Japanese Patent Publication No. 8-299191), which comprises a graphite substrate with a predetermined shape for cooking, having a thermal conductivity of 30 W/(m·K) or more over the entire temperature range from room temperature to 400°C; a layer consisting of thermal decomposition products of a metal-containing organic polymer formed on the surface or surface layer of the graphite substrate, at least on the cooking surface; and a fluororesin layer formed on the surface of the layer consisting of the thermal decomposition products of the metal-containing organic polymer, at least on the cooking surface. Patent No. 4565476Japanese Patent Application Publication No. 8-299191 A perspective view of frying pan 1 used as a heating device.These are three-view drawings of frying pan 1, where (A) is a plan view of frying pan 1, (B) is a cross-sectional view of the section along line B-B in (A), and (C) is a bottom view of frying pan 1.These are cross-sectional views of the main parts of each frying pan 1: (A) Cross-sectional view of a convex layer 20 formed by a functional material layer 2 on the heat transfer surface 40; (B) Cross-sectional view of an embedded layer 21 made of a functional material layer 2 provided in the concave and convex portions 41 and 42 on the heat transfer surface 40; (C) Cross-sectional view of a continuous coating layer 22 made of a functional material layer 2 provided on the heat transfer surface 40 including the concave and convex portions 41 and 42; and (D) Cross-sectional view of a mesh-like coating layer 23 made of a functional material layer 2 provided on the heat transfer surface 40 that is the remainder of the convex portion 42. The heating device and its manufacturing method according to this embodiment will be described in detail below with reference to the drawings. In particular, this embodiment will describe the structure of the frying pan 1 as a heating device according to the manufacturing method of the frying pan (heating device) 1, which includes a mixing step of mixing tourmaline powder 30 and non-magnetic material powder 31 to form a mixed powder 3, a molding step of forming the mixed powder 3 onto the heat transfer surface 40 of a heat transfer base 4 to form a functional material layer 2, and a magnetization step of magnetizing the non-magnetic material powder 31. The mixing step involves homogeneously mixing the tourmaline powder 30 and the non-magnetic material powder 31, with the magnetic powder 31 content being 1 to 50 wt%, to obtain a mixed powder 3. The tourmaline powder 30 and the non-magnetic material powder 31 have similar particle sizes; for example, the par