US 10,208,867 B2Granted

Throttling device and refrigeration cycle

AssigneeKabushiki Kaisha Saginomiya Seisakusho

InventorsYasumasa Takada, Yuichiro Toyama, Hiroki Denda, Yoshihisa Arai, Junichi Yokota

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Abstract

A throttling device is equipped with a valve seat in which a valve port for connecting a primary chamber and a secondary chamber is formed, a needle valve, a needle section which is inserted into the valve port, a guide section for guiding a slide shaft of the needle valve, and a coil spring for biasing the needle valve in a valve-closing direction. The guide section and the coil spring are positioned on the primary chamber side. The position of the needle valve in the valve-closing direction is restricted by a stopper section in a manner such that the minimum gap between the needle valve and the valve port is maintained. Furthermore, the needle valve is not seated on the valve seat.

Claims11

Dependent claims

A throttling device provided in between a condenser and an evaporator in a refrigeration cycle for depressurizing a refrigerant in between a primary chamber connected to the condenser and a secondary chamber connected to the evaporator to feed the refrigerant to the evaporator,

said throttling device comprising:
a valve seat in which a valve port for communicating between the primary chamber and the secondary chamber is formed;
a valve body for varying a valve opening degree of the valve port by moving along an axial line of the valve port;
a guide section for guiding a sliding shaft of the valve body;
and
a biasing means for biasing the valve body in a valve closing direction,
wherein the guide section and the biasing means are arranged in the primary chamber side, a position of the valve body in the valve closing direction is regulated with a stopper means for maintaining a minimum gap between the valve body and the valve port, and the valve body is configured to be prevented from seating the valve seat.

4 more elements

Dependencies are inferred from the claim text.