US 2022/0178600 A1Published application

Electronic expansion valve

AssigneeZhejiang Sanhua Intelligent Controls Co., Ltd.

InventorXianrang Wei

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Abstract

An electronic expansion valve includes a valve needle screw assembly which includes a valve needle, a valve needle sleeve, a washer part, a spring, and a screw assembly. The valve needle sleeve includes a circumferential wall part and a fitting part. The inner diameter of the fitting part is smaller than the inner diameter of the circumferential wall part. The screw assembly includes a lower stopper part, a valve needle support part, and an upper stopper part. The lower stopper part abuts against the washer part. The valve needle support part abuts against the fitting part of the valve needle sleeve. The upper stopper part abuts against the spring. The distance between the valve needle support part and the washer part is D1; the distance between the valve needle support part and the upper end of the fitting part is D2; and D1≥D2.

Claims10

Dependent claims

An electronic expansion valve, comprising a valve needle and screw rod assembly, the valve needle and screw rod assembly comprising a valve needle, a valve needle sleeve, a washer portion, a spring and a screw rod assembly;

wherein
the valve needle is fixedly connected to the valve needle sleeve, the valve needle sleeve comprises a peripheral wall portion and a fitting portion, and an inner diameter of the fitting portion is smaller than an inner diameter of the peripheral wall portion;
the screw rod assembly comprises a lower stop portion, a valve needle support portion and an upper stop portion, and the lower stop portion is configured to abut against the washer portion;
the valve needle support portion is configured to abut against the fitting portion of the valve needle sleeve;
the upper stop portion is configured to abut against the spring;
and
in a case that the lower stop portion abuts against the washer portion, a distance between the valve needle support portion and the washer portion is D1, a distance between the valve needle support portion and an upper end of the fitting portion is D2, and D1≥D2.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application: 17/617,339Filed 28 Jun 2020
Priority: CN 201910574593.528 Jun 2019
Published: 9 Jun 2022
Term ends: Not estimatedThe source records don’t support an estimate.

Classification10 codes

F16K 25/005
Details relating to contact between valve members and seats: particular materials for seats or closure elements
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 1/32
Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion…: details
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…