an electric valve

A technology of electric valves and valve seats, applied in the field of control valves, can solve problems such as insufficient flow area of ​​valve chambers, and achieve the effects of avoiding sudden changes in pressure, preventing refrigerant noise, and preventing sudden changes
CN103133701BActive Publication Date: 2016-08-03ZHEJIANG SANHUA INTELLIGENT CONTROLS CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
ZHEJIANG SANHUA INTELLIGENT CONTROLS CO LTD
Publication Date
2016-08-03

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Abstract

The invention relates to the technical field of control valves, in particular to a motorized valve for adjusting flow rate of fluid. The motorized valve comprises a valve seat assembly. The valve seat assembly comprises a valve seat provided with a first valve cavity and a valve core seat fixed on the valve seat and provided with a valve opening. A second valve cavity for the fluid to circulate is arranged in the valve core seat. The first valve cavity and the second valve cavity are communicated through a communication portion. The valve core seat is further provided with a guiding section matched with a valve needle, and the inner diameter of the guiding section is smaller than that of the second valve cavity. According to the motorized valve, the second valve cavity with the inner diameter larger than the guiding section of the valve needle is arranged in the valve core seat, and the motorized valve can contain large refrigeration volume under the condition that the appearance and the size of the motorized valve are not changed. In addition, a circulation sectional area ratio of each circulation portion in a flow channel is configured so that mutating of pressure in the flow channel is avoided, the mutating phenomenon when refrigerant circulates is avoided, and noise of the refrigerant is avoided.
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Description

technical field

[0001] The invention relates to the technical field of control valves, in particular to an electric valve for regulating fluid flow. Background technique

[0002] In air conditioners, refrigerators, heat pump water heaters and various refrigeration and heating equipment, electric valves are usually used to regulate the flow of fluid.

[0003] The electric valve usually includes a valve seat assembly, a nut assembly, a valve needle screw assembly, and a rotor assembly. The valve seat assembly usually includes a valve seat and a connecting pipe. The valve seat has a valve port, and the valve seat and the connecting pipe are usually welded together to form a valve seat. Assemblies, the valve needle of the needle screw assembly is installed in the nut of the nut assembly.

[0004] The patent document (JP-A-2009-162366) discloses an electric valve, the nut of the nut assembly is fixed in the guide sleeve, the guide sleeve is fixed on the stretched valve seat, and...

Claims

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