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|1. (WO2018121418) EXPANSION SWITCHING VALVE|
|Applicants:||BYD COMPANY LIMITED
|Title:||EXPANSION SWITCHING VALVE|
An expansion switching valve comprises a valve body (500). A first inlet (501a), a second inlet (501b), an outlet (502), and an internal flow path communicating the first inlet (501a), the second inlet (501b), and the outlet (502) are formed at the valve body (500). A first valve core (503) and a second valve core (504) are installed at the internal flow path. The first valve core (503) allows or blocks direct communication between the first inlet (501a) and the outlet (502). The second valve core (504) allows or blocks communication between the second inlet (501b) 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 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, lower costs, and reduce a charge of refrigerant introduced into the entire heat pump system, thereby facilitating oil return to a compressor.