US 2026/0287227 A1Published application

Electronic expansion valve

AssigneeZhejiang Dunan Artificial Environment Co., Ltd.

InventorsZhou YU, Weijia WANG

Life of this patent

Estimating the term…

Loading patent…

Abstract

An electronic expansion valve. The electronic expansion valve includes a fixed seat assembly, a transmission assembly, and a valve core assembly. The fixed seat assembly has a valve cavity and a valve port. The transmission assembly comprises a screw rod and a nut, and the screw rod is configured to rotate in the circumferential direction. The nut is in threaded connection with the screw rod, and is restricted by the fixed seat assembly and fits with the fixed seat assembly along the circumference thereof. The valve core assembly is located inside the valve cavity. The valve core assembly includes a main core body and an elastic member. The main core body is provided with an accommodating slot. The elastic member is disposed in the accommodating slot, and the nut extends into the accommodating slot and is pressed against the elastic member.

Claims20

Dependent claims

An electronic expansion valve, comprising

a fixed seat assembly comprising a valve cavity and a valve port;
a transmission assembly comprising a screw rod and a nut, wherein the screw rod is restricted by the fixed seat assembly and fits with the fixed seat assembly along an axis of the screw rod, the screw rod is configured to rotate along the axis of the screw rod;
and
the nut is sleeved around the screw rod, the nut is in threaded connection with the screw rod, and an outer surface of the nut is restricted by the fixed seat assembly and fits with the fixed seat assembly along a circumference of the nut;
a valve core assembly, wherein the valve core assembly is disposed in the valve cavity, the valve core assembly comprises a main core body and an elastic member, the main core body is provided with an accommodating slot, the elastic member is disposed in the accommodating slot, and the nut extends into the accommodating slot and is pressed against the elastic member;
and
the nut is configured to compress the elastic member to push the main core body toward the valve port, causing the main core body to seal the valve port.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application: 19/686,968Filed 25 May 2026
Priority: CN 202311636847.430 Nov 2023
Published: 24 Sep 2026
Term ends: Not estimatedThe source records don’t support an estimate.

Classification9 codes

F25B 41/35
With the valve member being actuated by electric means, e.g. by piezoelectric actuators: by rotary motors, e.g. by stepping motors
F16K 1/36
Cutting-off parts, e.g. valve members, seats: valve members
F16K 31/047
Using a motor: characterised by mechanical means between the motor and the valve, e.g. lost motion means reducing backlash, clutches, brakes or…
F16K 31/50
Mechanical actuating means: with screw-spindle or internally threaded actuating means