Vacuum insulating liquid electric heater

Abstract

The invention relates to a vacuum heat insulation liquid electric heater which comprises an inner heating cylinder, an electrode and a heat insulation cylinder, a glass or ceramic insulation layer is laid on the outer surface of the inner heating cylinder, a heating wire or thick film heating layer is closely wound on the outer surface of the glass or ceramic insulation layer, and the two ends of the inner heating cylinder and the two ends of the heat insulation cylinder are welded and sealed. The inner heating cylinder and the heat insulation cylinder form a cavity, and the cavity is vacuumized to form a vacuum cavity so as to isolate heat conduction. And the heating wire or the thick film heating layer is connected with an external power supply through an electrode. Three losses of convection, radiation and conduction of heat can be reduced or isolated, the surface temperature rise of the heat insulation barrel is reduced, and the comprehensive heat efficiency of the heater is greatly improved.

Description

technical field [0001] The invention relates to a flow-through liquid heating appliance, in particular to an electric heater for vacuum heat-insulating liquid. Background technique [0002] Heating liquid, especially tap water or pure water, is ubiquitous in daily production and life. The over-flow liquid heating appliance has the advantages of fast liquid heating, flexible and precise temperature adjustment, and extremely convenient use. It has the great advantages of high heating efficiency, energy saving and environmental protection, and has been widely used. [0003] Traditional overflow heaters generally have an inner heating cylinder. Liquid flows through the inside of the heating cylinder, and the heating wire or thick film heating layer is arranged on the outer surface of the heating cylinder. The structure has high heat transfer efficiency. However, since the heating layer is on the outer surface of the heating pipe, the heating layer will lose a lot of heat ener...

AI Technical Summary

Problems solved by technology

However, since the heating layer is on the outer surface of the heating pipe, the heating layer will lose a lot of heat energy through radiation and air conduction, etc., which will eventually lead to a decrease in thermal efficiency, and at the same time cause the temperature rise of the surrounding environment to be too high, especially in some places where the space is compact. all kinds of inconvenience

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