A water tank comprises: a tank body (1), a lid (2), a valve compartment, a water-feeding system component (8), and a water-discharging system component (7). The valve compartment communicates with the tank body (1) via the lid (2). Water is fed and discharged via the water-feeding system component (8) and the water-discharging system component (7). Opening and closing of communication between the valve compartment and the lid (2) are controlled by a switch component including a valve compartment cover switch, a lid switch stop block (11), a lid switch slider (12) and a lid switch-limiting block (13). The lid switch-limiting block (13) is vertically inserted into the lid switch stop block (11), and the lid switch slider (12) is horizontally inserted and fixed. The water tank can be installed conveniently. Shot blasting is performed on the tank body and a surface of the lid so that deformation will not occur easily under heat. The opening and closing of communication between the valve compartment and the lid (2) are controlled by a specific switch component, thereby improving convenience in opening and closing the lid and increasing service life of the lid.Selon linvention, un réservoir deau comprend : un corps de réservoir (1), un couvercle (2), un compartiment de vanne, un composant de système dalimentation en eau (8), et un composant de système de refoulement deau (7). Le compartiment de vanne communique avec le corps de réservoir (1) par le couvercle (2). Leau est fournie et refoulée par le composant de système dalimentation en eau (8) et le composant de système de refoulement deau (7). Louverture et la fermeture de la communication entre le compartiment de vanne et le couvercle (2) sont commandées par un composant de commutation comprenant un commutateur de couvercle de compartiment de vanne, un bloc darrêt de commutateur de couvercle (11), un curseur de commutateur de couvercle (12), et un bloc de limitation de commutateur de couvercle (13). Le bloc de limitatio
