Safe heating vacuum cup

Abstract

The invention discloses a safe heating vacuum cup. The cup comprises a cup body and a cup cover. A heating device is arranged in the cup body. A pressure relief device is arranged at the top of the cup cover. A pressure relief hole corresponding to the pressure relief device is formed in the bottom surface of the cup cover. The pressure relief device comprises a base. The inner cavity of the baseis communicated with the pressure relief hole, a silica gel sealing piece moving up and down through an elastic piece is further arranged in the inner cavity of the base, the silica gel sealing piecemoves up and down to be separated from or attached to the wall face of the inner cavity of the base to achieve unblocking of the pressure relief hole and the outside atmosphere, the inside and the outside of the cup are communicated, air pressure is balanced, and the cup cover is opened easily. The silica gel sealing piece is provided with an exhaust hole which can be elastically opened under theaction of air pressure, when the air pressure in the cup is too large, the exhaust hole can be expanded to exhaust air in the cup, and the safety problem caused by overpressure is prevented.

Description

Technical field [0001] The invention relates to a thermal insulation cup with heating function. Background technique [0002] The thermos cup is a container that can extend the warming time of food. Its function is mainly to store the food that has just been cooked and keep it warm for a long time, so that people can start eating without reheating when they are carried out. [0003] In the prior art, a heating device is provided in the thermos cup body, so that the thermos cup has the function of heating and keeping warm, so that the drinks and food stored in the thermos cup can be kept in a warm state or be cooked twice; When the heating function is used, the liquid or gas in the cup will evaporate or expand as the temperature rises, causing the pressure in the cup to increase continuously, which may cause accidents. On the other hand, due to the principle of thermal expansion and contraction, when the vacuum flask is heated and cooked, the pressure in the vacuum flask is greater...

AI Technical Summary

Problems solved by technology

[0003] In the prior art, a heating device is provided in the body of the thermos cup, so that the thermos cup has a heating and heat preservation function, so that the drinks and food stored in the thermos cup can be kept in a warm state, or for secondary cooking; but in realizing During the heating function, the liquid or gas in the cup will evaporate or expand as the temperature rises, resulting in the continuous increase of the air pressure in the cup and causing accident hazards

On the other hand, due to the principle of thermal expansion and contraction, when the thermos cup is heated and cooked, the pressure inside the thermos cup is greater than the atmospheric pressure, making it difficult to open the lid. Similarly, when high-temperature food is placed in the thermos cup, the cup will The air and water in the cup are in a state of high temperature, and as the temperature in the cup gradually drops, a negative pressure will be formed in the cup, and there will be a pressure difference between the inside and outside of the cup, which will make it difficult to open the cup lid

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