Hand warmer

Abstract

The invention discloses a hand warmer, comprising a shell, a circuit board, a power supply, a heating assembly, a heat isolation layer and a heat conduction assembly, wherein the power supply and the circuit board are connected and are arranged in the shell, and the heating assembly is connected with the circuit board and is arranged on the outer part of the shell; the heating assembly is fixedly connected with the shell through the heat isolation layer at the bottom of the heating assembly; the heat conduction assembly is arranged in a manner of wrapping and appressing the heating assembly; a heating film is adopted as the heating assembly and is located in an interlayer between the heat isolation layer and the heat conduction assembly; and the heat conduction assembly comprises heat-conduction glue and a heat-conduction sheet, the heat-conduction glue is in tight contact with the heating film and used for balancing the surface temperature of the heat-conduction sheet on the heat-conduction glue, and the heat-conduction sheet is a hand-warmer face layer of a palm curve shape. The hand warmer disclosed by the invention is high in heat efficiency, a rechargeable battery or a common battery can be adopted for the hand warmer, and a battery compartment is provided with a structure capable of preventing battery reversal.

Description

technical field [0001] The invention relates to an electric heating appliance, in particular to a portable hand warmer. Background technique [0002] In the cold winter, many wage-earners and office workers need to move outside the cold office. To help them withstand the cold, rechargeable hand warmers have appeared on the market. For example, the invention patent application with the patent number ZL200510127898.3 discloses a portable battery hand warmer, which includes a metal shell, a plastic connector, and a rechargeable battery. The far-infrared electrothermal film is bonded to the inner side of the metal shell with a thermally conductive insulating layer. The far-infrared electrothermal film is separated from the battery installed in the plastic connector by a heat reflection layer. The far-infrared electrothermal film is formed by the device. The switch on the plastic connecting body, the thermostat controls its heating effect and heating time. The structure of the ...

AI Technical Summary

Problems solved by technology

The structure of the hand warmer in the prior art is similar to the above-mentioned ZL200510127898.3 patent. Generally, the technical scheme of directly heating the shell by the heating device is adopted, so that the thermal efficiency is not high, and the charging time of the hand warmer is long, and the battery cannot be replaced. It cannot be charged in time after being used for portable use, and can only be used interrupted

Although some hand warmers can replace the battery, they generally do not have a battery anti-reverse structure. When the battery terminals are accidentally connected incorrectly, it is easy to burn the circuit board.

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