A pressure cooker includes a cooker body and a lid. The lid is positionable above the cooker body and includes a heater, a fan, a motor, one or more protrusions, a tab, and a connector. The heater is configured to provide heat to the cooker body. The fan is configured to provide air flow to the cooker body. The motor is configured to drive the fan. The first protrusions are configured to lock the lid to the cooker body to preserve pressure in the cooker body. The tab is movable between a first position and a second position to engage or disengage the one or more first protrusions with the cooker body by sliding along a predetermine route. The tab is positioned at a side of the one or more first protrusions opposite to a center of the lid. The connector is coupled to the first protrusions and the tab.

Disclosed is a pressure cooker having a negative pressure vacuum state, including a body having an accommodating space, a cover, and a control structure. The control structure includes a sealing elastic member, a pressure relief valve, and a stop valve. The accommodating space includes a high pressure state, a micro-positive pressure state, and a negative pressure vacuum state, and when the accommodating space is in the high pressure state, the pressure relief valve is lifted upward by a high pressure thrust, to discharge high pressure gas in the accommodating space, and the stop valve is lifted upward under pressure to limit opening of the cover and is in a sealed state; and when the accommodating space is in the micro-positive pressure state or the negative pressure vacuum state, the pressure relief valve, the stop valve, the body, and the cover each are in the sealed state.

A cooking device includes a pot lid assembly and a pot body. The pot lid assembly includes a pot lid including a plurality of first pot teeth. The pot lid including at least two first fool-proof structures each formed at one of the plurality of first pot teeth. The pot body includes a plurality of second pot teeth. The pot body includes at least two second fool-proof structures each provided at one of the plurality of second pot teeth. The pot lid and the pot body are configured to be buckled with each other via a one-to-one cooperation between the at least two first fool-proof structures and the at least two second fool-proof structures.