Expansion switch valve

Abstract

This disclosure discloses an expansion switch valve, including a valve body, where an inlet, an outlet, and an internal passage in communication between the inlet and the outlet are formed on the valve body, a first valve plug and a second valve plug are mounted on the internal passage, the first valve plug makes the inlet and the outlet in direct communication or out of communication, and the second valve plug makes the inlet and the outlet in communication through a throttle port or out of communication.

What is claimed is: 
     
         1 . An expansion switch valve, comprising a valve body, wherein an inlet, an outlet, and an internal passage in communication between the inlet and the outlet are formed on the valve body, a first valve plug and a second valve plug are mounted on the internal passage, the first valve plug makes the inlet and the outlet in direct communication or out of communication, and the second valve plug makes the inlet and the outlet in communication through a throttle port or out of communication. 
     
     
         2 . The expansion switch valve according to  claim 1 , wherein the internal passage comprises a first passage and a second passage that are separately in communication with the inlet, a first valve port fitting the first valve plug is formed on the first passage, the throttle port is formed on the second passage to form a second valve port fitting the second valve plug, and the first passage and the second passage converge downstream of the second valve port and are in communication with the outlet. 
     
     
         3 . The expansion switch valve according to  claim 2 , wherein the second passage and the outlet are provided in a same direction, the first passage forms a first through hole perpendicular to the second passage, the inlet is in communication with the second passage through a second through hole provided in a sidewall of the second passage, and the first through hole is in communication with the second through hole and the inlet separately. 
     
     
         4 . The expansion switch valve according to  claim 1 , wherein the inlet and the outlet are provided on the valve body perpendicularly to each other. 
     
     
         5 . The expansion switch valve according to  claim 2 , wherein the first valve plug is disposed coaxially with the first valve port along a moving direction, to selectively plug up or detach from the first valve port. 
     
     
         6 . The expansion switch valve according to  claim 2 , wherein the second valve plug is disposed coaxially with the second valve port along a moving direction, to selectively plug up or detach from the second valve port. 
     
     
         7 . The expansion switch valve according to  claim 5 , wherein the first valve plug comprises a first valve stem and a first plug connected to an end portion of the first valve stem, and the first plug is used for pressing against an end face of the first valve in a sealing manner, to plug up the first passage. 
     
     
         8 . The expansion switch valve according to  claim 6 , wherein the second valve plug comprises a second valve stem, an end portion of the second valve stem forms a conical head structure, and the second valve port forms a conical hole structure fitting the conical head structure. 
     
     
         9 . An expansion switch valve according to  claim 1 , wherein the valve body comprises a valve base that forms the internal passage and a first valve housing and a second valve housing mounted on the valve base, a first electromagnetic drive portion used for driving the first valve plug is mounted inside the first valve housing, a second electromagnetic drive portion used for driving the second valve plug is mounted inside the second valve housing, the first valve plug extends from the first valve housing to the internal passage inside the valve base, and the second valve plug extends from the end proximal to the second valve housing to the internal passage inside the valve base. 
     
     
         10 . The expansion switch valve according to  claim 9 , wherein the valve base is formed as a polyhedral structure, the first valve housing, the second valve housing, the inlet, and the outlet are separately disposed on different surfaces of the polyhedral structure, wherein installation directions of the first valve housing and the second valve housing are perpendicular to each other, and opening directions of the inlet and the outlet are perpendicular to each other. 
     
     
         11 . The expansion switch valve according to  claim 2 , wherein the inlet and the outlet are provided on the valve body perpendicularly to each other. 
     
     
         12 . The expansion switch valve according to  claim 3 , wherein the inlet and the outlet are provided on the valve body perpendicularly to each other. 
     
     
         13 . The expansion switch valve according to  claim 3 , wherein the first valve plug is disposed coaxially with the first valve port along a moving direction, to selectively plug up or detach from the first valve port. 
     
     
         14 . The expansion switch valve according to  claim 3 , wherein the second valve plug is disposed coaxially with the second valve port along a moving direction, to selectively plug up or detach from the second valve port.