Patent ID: 9541211
Date: 2017-01-10
CPC Classifications: F16H,F16K,G05D

Claim:
1. A thermostatic valve, comprising a housing in which a cavity is provided, and a thermostatic actuating element mounted in the cavity, wherein the thermostatic actuating element comprises a main body in which a thermosensitive substance is provided; the thermostatic valve further comprises a piston slidably mounted at one end of the main body, and one end of the piston protrudes out of the main body; the housing further comprises three ports, comprising a first port, a second port and a third port, wherein the first port is in communication with the second port through the cavity, and the third port is selectively in communication with the first port and the second port; the housing is provided with an open end which is closed by a cap assembly; the thermostatic valve further comprises a first elastic element and a second elastic element, wherein the first elastic element is provided on the cap assembly or at a side close to the cap assembly, and the first elastic element has one end abutting against the cap assembly, and another end directly abutting against or indirectly abutting against the piston at least during a moving process; the second elastic element is provided at the third port or at a side close to the third port, and the second elastic element has one end abutting against an inner wall or a bottom wall of the cavity of the housing, and another end abutting against the main body, and an initial deformation force of the first elastic element is greater than or equal to a pressure applied to the second elastic element when the main body abuts against the housing at a portion where the third port is provided; in a case that the thermostatic actuating element is heated, the thermosensitive substance expands, and after the piston directly abuts against or indirectly abuts against the first elastic element, the main body is moved with respect to the piston, that is moving towards the third port, until an abutting portion of the main body abuts against the housing at the portion where the third port is provided, and then the piston compresses the first elastic element and moves towards the cap assembly.