Vacuum electric heat-insulation vessel and vacuum welding process

Abstract

An electrothermal vacuum-insulating utensil is composed of internal container, external shell, electrothermal element, temp controller for container, external shell, electrothermal element, temp controller for controlling the electrothermal element and temp sensor. It is characterized by that a vacuum cavity is between internal container and externall shell, and said external shell has a pit for arranging said temp sensor in it and holding the internal container. Its advantages are high thermal efficiency and correct temp control.

Description

technical field [0001] The invention relates to an electric heat preservation vessel, in particular to a stainless steel vacuum electric heat preservation vessel, which is used for cups, bottles, pots, pans and the like. Background technique [0002] General-purpose stainless steel vacuum insulation containers, such as vacuum thermos cups, vacuum thermos bottles, etc., only have the function of vacuum insulation and have no heating function, while the common electric heating containers on the market, including electric heating thermos bottles, rice cookers, etc., have a general insulation structure. All adopt solid foam material or fiber thermal insulation material as the heat insulation layer, and what have simply just do not have the heat insulation layer in real sense, and the heat preservation effect is poor. [0003] On May 15, 1996, the Chinese Patent Office disclosed a patent for a vacuum heat preservation electric heating vessel with a patent number of 95214879.X. A...

AI Technical Summary

Problems solved by technology

[0002] General-purpose stainless steel vacuum insulation containers, such as vacuum thermos cups, vacuum thermos bottles, etc., only have the function of vacuum insulation and have no heating function, while the common electric heating containers on the market, including electric heating thermos bottles, rice cookers, etc., have a general insulation structure. All use solid foam material or fiber insulation material as the heat insulation layer, and some simply have no real heat insulation layer, and the heat preservation effect is poor.

[0003] On May 15, 1996, the Chinese Patent Office disclosed a patent for a vacuum heat preservation electric heating vessel with a patent number of 95214879.X. As a whole, but in fact, because its sensor is placed outside the inner tank in the vacuum chamber, and the lead wire of the sensor must pass through the outer tank and the vacuum layer of the inner tank and the outer tank, the temperature will rise when the vacuum is pumped. Temperature above 500°C will cause the sensor and line to burn out, so the heating element will be damaged during the vacuuming process. In addition, the patent does not propose how to solve the problem that the heating tube (or lead-out line) passes through the outer wall (or bottom) of the vacuum vessel The welding sealing scheme makes the patent impossible to implement

Images