EXPANSION VALVE

An expansion valve includes: a main body portion having a valve chamber and a valve seat; a case fixed to the main body portion; and a screw shaft that is driven by driving force of rotation obtained by reducing a rotational movement of a rotor due to the excitation of an excitation portion by a spe...

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Bibliographic Details
Main Authors MURATA, Naoki, KONDO, Takayuki, SATO, Koji, OGAWA, Noriyuki, URAKAWA, Ryota
Format Patent
LanguageEnglish
Published 11.08.2022
Subjects
ACTUATING-FLOATS
BLASTING
COCKS
COMBINED HEATING AND REFRIGERATION SYSTEMS
DEVICES FOR VENTING OR AERATING
ENGINEERING ELEMENTS AND UNITS
GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS
HEAT PUMP SYSTEMS
HEATING
LIGHTING
LIQUEFACTION SOLIDIFICATION OF GASES
MANUFACTURE OR STORAGE OF ICE
MECHANICAL ENGINEERING
REFRIGERATION MACHINES, PLANTS OR SYSTEMS
REFRIGERATION OR COOLING
TAPS
THERMAL INSULATION IN GENERAL
VALVES
WEAPONS
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Summary:An expansion valve includes: a main body portion having a valve chamber and a valve seat; a case fixed to the main body portion; and a screw shaft that is driven by driving force of rotation obtained by reducing a rotational movement of a rotor due to the excitation of an excitation portion by a speed reduction mechanism to move a valve body forward and backward. A bellows configured to seal a gap between the inside of the case and the valve chamber is arranged in the valve chamber to be externally fitted onto the valve body, and the rotation of the valve body relative to the main body portion is restricted by a rotation restrictor.
Bibliography:Application Number: US202017629304