Multi direction changeover valve

Abstract

To provide a multi-way selector valve properly used for a vehicle, with a smooth flow path switching operation even in case of a large pressure difference between the inside and outside of a valve body, a reduced refrigerant passing noise at a time of switching a flow path, and an easy flow path switching operation, the multi-way selector valve includes a valve body 50 rotated by a flow path switching actuator 15, and a valve main body 60 rotatably holding the valve body 50, the flow path switching actuator is a stepping motor 15 including a rotor 16 placed on the inner peripheral side of a can 38 and a stator 17 placed on an outer periphery of the can 38, and a planetary gear type speed reduction mechanism 40 is inserted between the rotor 16 of the stepping motor 15 and the valve body 50.

Description

Technical field

[0001] The present invention relates to multi-way switching valves such as three-way switching valves and four-way switching valves used in refrigeration cycles, etc., and more particularly to a rotary multi-directional switching valve suitable for vehicles, which is actuated by a planetary gear reduction mechanism. The actuator rotates the valve core to switch the flow path. Background technique

[0002] Generally speaking, in addition to compressors, gas-liquid separators, condensers (outdoor heat exchangers), evaporators (indoor heat exchangers), and expansion valves, the refrigeration cycles of air conditioners and refrigeration devices also have functions as flow The four-way switching valve of the path (flow direction) switching unit.

[0003] reference Picture 12 , Figure 13 An example of a refrigeration cycle having this four-way switching valve will be described. The refrigeration cycle 300 of the illustrated example is the structure of an air conditione...

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