Capacitor, electric appliance box and electric appliance

The utility model provides a capacitor, an electric appliance box and an electric appliance, the capacitor comprises a dielectric body, and the dielectric body is provided with an electrode; the pins are electrically connected with the electrodes; the capacitor further comprises a shell, a positioning groove and a pin mounting groove are formed in the shell, and the dielectric body is mounted in the positioning groove and is in limiting fit with the positioning groove; the pin comprises a pin connecting part and a pin leading-out part which are arranged along the length direction of the pin, the pin connecting part is positioned in the pin mounting groove, and the pin leading-out part extends out of the shell; the pin connecting part is provided with an elastic piece, the pin is electrically connected with the electrode through the elastic piece, and the elastic piece abuts against the electrode. The capacitor adopts a pressure extrusion contact mode, so that the problem of poor welding caused by changes of t