Flow path switcher and liquid detergent delivery device

Abstract

Disclosed herein is a flow path switcher, comprising a valve core, a shell and a base. The shell comprises a valve seat A, a valve seat B, a channel of valve seat A, a channel of valve seat B, an outlet and an inlet. The base comprises a valve seat C, the valve seat A and the valve seat B are located on one side of the valve core and the valve seat C is located on the other side of the valve core. Also a liquid detergent delivery device with the flow path switcher is disclosed, comprising a main channel, a piston, a one-way valve D, a one-way valve E, a detergent box A and a Venturi negative pressure generator. The flow path switcher is connected between the entrance of the Venturi negative pressure generator and the exit of the main channel, the inlet of the flow path switcher and the outlet of the flow path switcher are connected to the exit of the main channel and the entrance of the Venturi negative pressure generator, respectively, the channel of valve seat B is connected to the exit of the one-way valve D, the exit of the one-way valve D is connected to the entrance of the piston, the entrance of the one-way valve D is connected to the detergent box A, the exit of the piston is connected to the entrance of the one-way valve E, and the exit of the one-way valve E is connected to the negative pressure port of the Venturi negative pressure generator. The present invention is used for delivery of detergents of washing machines.