KR-102963896-B1 - A THERMOSTATIC COMPOSITE MULTILAYER RICE COOKER INNER TANK PROCESS WITH INTERNAL HIGH PRESSURE FORMING

Abstract

The present invention relates to an internal high-pressure forming process for a constant-temperature composite multilayer electric rice cooker inner pot, comprising: a. a step of providing a first hard-brazing flux layer between a prepared stainless steel plate and an aluminum plate to form an inner layer set in which the stainless steel is on the inside and the aluminum is on the outside; b. a step of placing the inner layer set into a mold and performing tensile forming to form an inner layer of the electric rice cooker inner pot; c. a step of providing a second hard-brazing flux layer between a prepared stainless steel plate and an aluminum plate to form an outer layer set in which the aluminum is on the inside and the stainless steel is on the outside; d. a step of placing the outer layer set into a mold and performing tensile forming to form an outer layer of the electric rice cooker inner pot; e. a step of hard-brazing the outer layer set; and f. a step of placing the outer layer set into an internal high-pressure forming mold to form a heat conductive liquid channel. The beneficial effect is that the tensioned outer layer set is formed into a heat conductive liquid channel using an internal high-pressure water expansion device, so the yield is high during the forming process.

Inventors

• 천, 지엔쥔

Assignees

• 저지앙 정청 뉴 에너지 테크놀로지 컴퍼니 리미티드

Dates

Publication Date

20260512

Application Date

20240405

Priority Date

20230407

Claims (10)

1. Step a) providing a first layer of hard soldering flux between a prepared stainless steel plate and an aluminum plate to form an inner plate set in which the stainless steel is on the inside and the aluminum is on the outside; Step b: Inserting a set of inner layer plates into a mold and performing tensile forming to form the inner layer of the electric rice cooker inner pot. Step c: forming a set of outer plates with aluminum on the inside and stainless steel on the outside; Step d, which involves placing an outer layer plate set into a mold and performing tensile forming to form the outer layer of the inner pot of an electric rice cooker; Step f of placing the outer layer plate set into an internal high-pressure molding mold to form a heat conductive liquid channel; Step g of placing an inner layer plate set into an outer layer plate set to form an inner pot semi-finished product, and providing a third brazing flux layer between the inner layer plate set and the outer layer plate set; Step h of brazing the inner pot semi-finished product; It includes step i of forming an electric rice cooker inner pot by injecting a heat conductive liquid into a heat conductive liquid channel and sealing it, and An internal high-pressure forming process for a constant temperature composite multilayer electric rice cooker inner pot, characterized in that the outer layer plate set formed in step c above has a stainless steel iron layer directly coated on an aluminum layer, and step d above is performed directly on an outer layer plate set that is not brazed.
2. In paragraph 1, Internal high-pressure molding process of a constant temperature composite multilayer electric rice cooker inner pot, characterized in that the internal high-pressure molding die in step f above uses water expansion molding.
3. In paragraph 1, Internal high-pressure molding process of a constant temperature composite multilayer electric rice cooker inner pot, characterized by first brazing the inner layer plate set prior to step g above.
4. delete
5. In paragraph 1, Internal high-pressure molding process of a constant temperature composite multilayer electric rice cooker inner pot, characterized by a brazing temperature of 580~650℃ and a brazing heating time of 15~20 minutes.
6. In paragraph 5, Internal high-pressure molding process of a constant temperature composite multilayer electric rice cooker inner pot, characterized by a brazing temperature of 605 degrees.
7. In paragraph 5, Internal high-pressure molding process of a constant temperature composite multilayer electric rice cooker inner pot, characterized in that the thickness of the electric rice cooker inner pot is between 2mm and 4mm.
8. In paragraph 5, Internal high-pressure molding process of a constant temperature composite multilayer electric rice cooker inner pot, characterized by the thickness of the electric rice cooker inner pot being 3mm.
9. In paragraph 5, Among the inner layer plate set, the stainless steel layer thickness is 0.6mm and the aluminum layer thickness is 1.2mm; Internal high-pressure forming process of a constant temperature composite multilayer electric rice cooker inner pot, characterized in that the thickness of the stainless steel layer among the outer layer plate set is 0.5 mm and the thickness of the aluminum layer is 0.7 mm.
10. In paragraph 1, Internal high-pressure molding process of a constant temperature composite multilayer electric rice cooker inner pot, characterized in that the above stainless steel is 430 stainless steel.

Description

Internal High Pressure Forming Process of a Thermostatic Composite Multilayer Rice Cooker Inner Tank The present invention relates to a molding process for a constant temperature inner pot of an electric rice cooker. An electric rice cooker is an easy-to-use cooking tool that uses electrical energy to convert it into thermal energy, heating and cooking the rice inside the inner pot to cook rice. It is a clean, healthy, and everyday household appliance capable of steaming, boiling, and making porridge. The invention of the electric rice cooker has shortened the time required to cook rice in many households. Rice is typically the primary ingredient used for cooking rice and making porridge. As living standards improve, demands regarding the quality of food are also rising. The inner pots of conventional electric rice cookers are made of metal and, while they conduct heat relatively quickly, they are inadequate in terms of insulation. When cooking porridge, the heat retention performance of the electric cooker is also a very important factor because the cooking time is long. In the case of an electric rice cooker with poor heat retention, energy consumption increases because the heater, which consumes a lot of energy, must be continuously operated to heat during the warming process. This electric rice cooker manufacturer has developed a stainless steel constant-temperature multilayer inner pot with excellent heat retention, but conventional stainless steel constant-temperature multilayer inner pots have a high molding defect rate of the heat conduction fluid channels. To overcome the disadvantages of the conventional molding production process for stainless steel constant temperature composite multilayer electric rice cooker inner pots, which are complex and have a high defect rate, the present invention provides an internal high-pressure molding process for a constant temperature composite multilayer electric rice cooker inner pot. To solve the above technical problem, the internal high-pressure molding process of a constant temperature composite multilayer electric rice cooker inner pot using the technical solution of the present invention includes the following steps. a. A step of providing a first hard soldering flux layer between a prepared stainless steel plate and an aluminum plate to form an inner plate set in which the stainless steel is on the inside and the aluminum is on the outside; b. A step of forming the inner layer of an electric rice cooker inner pot by placing the inner layer plate set into a mold and performing tensile forming; c. A step of providing a second layer of hard soldering flux between the prepared stainless steel plate and the aluminum plate to form an outer layer plate set in which the aluminum is on the inside and the stainless steel is on the outside; d. A step of placing an outer layer plate set into a mold and performing tensile forming to form the outer layer of the inner pot of an electric rice cooker; e. Step of brazing the outer layer plate set; f. Step of placing the outer layer plate set into an internal high-pressure molding die to form a heat conductive liquid channel; g. A step of placing an inner layer set into an outer layer set to form an inner pot semi-finished product, and providing a third brazing flux layer between the inner layer set and the outer layer set; h. Step of brazing the inner pot semi-finished product; i. A step of forming the inner pot of an electric rice cooker by injecting a heat conductive liquid into the heat conductive liquid channel and sealing it. In a desirable internal high-pressure forming technique, the internal high-pressure forming mold in step f above uses water expansion forming. To prevent the inner plate set from sliding, the inner plate set prior to step g above is first hard-soldered. In a preferred set of outer plates, the stainless steel layer in steps c and e is directly coated onto the aluminum layer so that step d is performed directly, and the two are not connected by brazing with a brazing flux. In a desirable brazing process, the brazing temperature is 580 to 650°C, and the brazing heating time is 15 to 20 minutes. More preferably, the brazing temperature is 605 degrees. In the desirable thickness of the electric rice cooker inner pot, the thickness of the electric rice cooker inner pot is between 2mm and 4mm. For a more desirable thickness of the electric rice cooker inner pot, the thickness of the electric rice cooker inner pot is 3mm. In the desired thickness of each layer, the thickness of the stainless steel layer in the inner layer set is 0.6 mm and the thickness of the aluminum layer is 1.2 mm; the thickness of the stainless steel layer in the outer layer set is 0.5 mm and the thickness of the aluminum layer is 0.7 mm. In the preferred stainless steel, the stainless steel is 430 stainless steel. The stainless steel inner pot manufactured according to the present invention is identical to the stainless steel const