Change-over valve and vacuum cleaner

A vacuum cleaner that includes a changeover valve, comprising:

• a valve body (1) and an internal-communication air duct (11) and a driving device arranged in the valve body (1);
• wherein the valve body (1) is connected with a housing (2) of a vacuum cleaner, the housing (2) is provided with a ventilation opening (21), an air inlet duct (31) for driven inlet air and an air outlet duct (32) for driven outlet air, the ventilation opening (21) is provided with a filter element (4), a first end of the internal-communication air duct (11) is connected with the ventilation opening (21), an outer side of the internal-communication air duct (11) is connected with the driving device, so that the driving device drives a second end of the internal-communication air duct (11) to rotate by a preset angle, the second end of the internal-communication air duct (11) is connected at the air inlet duct (31) and the air outlet duct (32) communicates with the external space, or the second end of the internal-communication air duct (11) is connected at the air outlet duct (32) and the air inlet duct (31) communicates with the external space.