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1. (WO2018121416) EXPANSION SWITCHING VALVE

Pub. No.:    WO/2018/121416    International Application No.:    PCT/CN2017/117816
Publication Date: Fri Jul 06 01:59:59 CEST 2018 International Filing Date: Fri Dec 22 00:59:59 CET 2017
IPC: F25B 41/06
F16K 11/20
Applicants: BYD COMPANY LIMITED
比亚迪股份有限公司
Inventors: HUANG, Jian
黄健
ZHANG, Xiaowei
张小伟
CHEN, Xuefeng
陈雪峰
YE, Meijiao
叶梅娇
Title: EXPANSION SWITCHING VALVE
Abstract:
An expansion switching valve comprises a valve body (500). An inlet (501), an outlet (502), and an internal flow path communicating the inlet (501) and the outlet (502) are formed at the valve body (500). A first valve core (503) and a second valve core (504), which are parallel to each other, are installed at the internal flow path. The first valve core (503) allows or blocks direct communication between the inlet (501) and the outlet (502). The second valve core (504) allows or blocks communication between the inlet (501) and the outlet (502) by means of a flow restriction hole (505). Installation of the first valve core (503) and the second valve core (504) at the internal flow path in the same valve body (500) realizes blocking and flow control of a refrigerant or throttling expansion. The expansion switching valve has a simple structure and can be manufactured and installed easily. Applying the expansion switching valve in a heat pump system can simplify pipeline connection, and reduce a charge of refrigerant introduced into the entire heat pump system, thereby facilitating oil return to a compressor.