# US 10,119,735 B2 · Electronic expansion valve

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- Number: US 10,119,735 B2
- Document ID: US10119735B2
- Status: Granted
- Kind: B2
- Application number: 15/032,545
- Filed: 2014-10-17
- Published: 2016-09-08
- Granted: 2018-11-06
- Earliest claimed: 2013-10-28
- Assignees: Gree Electric Appliances, Inc. of Zhuhai
- Applicants: Gree Electric Appliances, Inc. of ZHUHAI
- Inventors: Yaguo Zhang; Peigang Song; Yunyu Su; Wu Li
- Web page: https://patentgrep.com/patent/US10119735B2

## CPC

- F16K 31/0651: {the fluid passing through the solenoid coil}
- F16K 1/12: with streamlined valve member around which the fluid flows when the valve is opened
- F16K 31/04: using a motor
- F16K 31/047: {characterised by mechanical means between the motor and the valve, e.g. lost motion means reducing backlash, clutches, brakes or return means (F16K31/043 takes precedence)}
- F16K 31/0644: {One-way valve}
- F16K 31/0655: {Lift valves}
- F16K 31/0658: {Armature and valve member being one single element}
- F16K 31/0693: {Pressure equilibration of the armature}
- F16K 31/504: {the actuating means being rotable, rising, and having internal threads which co-operate with threads on the outside of the valve body}
- F16K 47/04: for decreasing pressure {or noise level}, the throttle being incorporated in the closure member
- F16K 47/08: for decreasing pressure {or noise level} and having a throttling member separate from the closure member {, e.g. screens, slots, labyrinths}
- F25B 41/35: by rotary motors, e.g. by stepping motors
- Y02B 30/70: Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
- F16K: VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING {(devices for emptying and evacuating the excess liquid in valves or conduits F16L55/07)}
- F25B: REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- Y02B: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS

## Abstract

The invention discloses an electronic expansion valve. The electronic expansion valve includes: a valve body (10), a first chamber being formed in the valve body (10), a liquid inlet (11) and a liquid outlet (12) being oppositely provided at two ends of the valve body (10); a second chamber, provided in the first chamber, a coil (20) being provided in the second chamber; a third chamber, an inlet end of the third chamber being communicated with the liquid inlet (11), an outlet end of the third chamber being communicated with the liquid outlet (12), the inlet end of the third chamber and the outlet end of the third chamber being coaxially provided, and a valve core (31) being provided in the third chamber; and the first chamber being communicated with the liquid inlet (11) via the first liquid passage hole (33).

## Claims

### Claim 1

An electronic expansion valve, comprising:
a valve body (10), a first chamber being formed in the valve body (10), a liquid inlet (11) and a liquid outlet (12) being oppositely provided at two ends of the valve body (10), and the liquid inlet (11) and the liquid outlet (12) being coaxially provided along a central axis of the valve body (10);
a second chamber, provided in the first chamber, a coil (20) being provided in the second chamber;
a third chamber, running through the second chamber, an inlet end of the third chamber being communicated with the liquid inlet (11), an outlet end of the third chamber being communicated with the liquid outlet (12), the inlet end of the third chamber and the outlet end of the third chamber being coaxially provided, and
a valve core (31) capable of moving along the central axis being provided in the third chamber; and
a first liquid passage hole (33), provided in a chamber wall of the third chamber, the first chamber being communicated with the liquid inlet (11) via the first liquid passage hole (33);
a sliding rail slot (32) is provided in the chamber wall of the third chamber, and the valve core (31) slides along the sliding rail slot (32);
an oil storage hole (321) is provided in an inner wall of the sliding rail slot (32).

### Claim 2 (depends on 1)

The electronic expansion valve according to claim 1, wherein a second liquid passage hole (311) extending in parallel to the central axis is provided in the valve core (31).

### Claim 3 (depends on 1)

The electronic expansion valve according to claim 1, wherein a reset spring (36) abutting against the valve core (31) is provided on an inner chamber wall of the third chamber.

### Claim 4 (depends on 3)

The electronic expansion valve according to claim 3, wherein a location snap ring (35) configured to locate the reset spring (36) is provided in the third chamber.

### Claim 5 (depends on 1)

The electronic expansion valve according to claim 1, wherein an end cover plate (23) is provided at a first end of the second chamber.

### Claim 6 (depends on 1)

The electronic expansion valve according to claim 1, wherein a seal ring (34) is provided at the outlet end of the third chamber.

### Claim 7 (depends on 1)

The electronic expansion valve according to claim 1, wherein the liquid inlet (11) and the liquid outlet (12) are each provided with a filter internally.

### Claim 8 (depends on 1)

The electronic expansion valve according to claim 1, further comprising a controller, configured to control a magnitude and a time of an energizing current of the coil (20).