Electronic expansion valve

Patent metadata

Field	Value
Publication number	US-10119735-B2
Application number	US-201415032545-A
Country	US
Kind code	B2
Filing date	Oct 17, 2014
Priority date	Oct 28, 2013
Publication date	Nov 6, 2018
Grant date	Nov 6, 2018

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 ).

First claim

The invention claimed is:

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 ).

2. 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 ).

3. 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.

4. 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.

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

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

7. 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.

8. 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 ).

Assignees

• Gree Electric Appliances Inc Zhuhai

Inventors

• Zhang Yaguo
• Song Peigang
• Su Yunyu
• Li Wu

Classifications

• F16K47/08

  for decreasing pressure {or noise level} and having a throttling member separate from the closure member {, e.g. screens, slots, labyrinths} · CPC title

• F16K31/047

  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) · CPC title

• F16K31/04

  using a motor · CPC title

• F16K31/0693

  Pressure equilibration of the armature · CPC title

• F16K31/504

  the actuating means being rotable, rising, and having internal threads which co-operate with threads on the outside of the valve body · CPC title