Heat preservation appliance

Abstract

The utility model discloses a heat preservation appliance which comprises a box body, a heat preservation cover and a heat preservation cover. The cover body comprises an inner cover and an outer cover, the first inner container is covered with the inner cover, the inner cover is provided with a one-way valve, the outer cover is connected with the box body in a buckled mode, and an avoiding hole is formed in the outer cover and corresponds to the one-way valve; the air extractor penetrates through the receding hole to be in butt joint with the one-way valve, and the air extractor extracts air in the first inner container through the one-way valve. After the cover body covers the first inner container, the cover body is in butt joint with the one-way valve through the air extractor, air in the first inner container is extracted through the air extractor, a low-pressure or vacuum state is kept in the first inner container, breeding of bacteria in the air is avoided, the freshness retaining time of food in the first inner container is prolonged, and freshness retaining and heat preservation are conducted on the food.

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