Electronic expansion valve
US10295064B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 19, 2015 |
| Grant date | May 21, 2019 |
| Priority date | — |
| Expiry date | Apr 26, 2035 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B30/70
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
An electronic expansion valve includes an electromagnetic coil, a valve body provided with a valve port, and a valve needle. The valve needle includes a main body section and a first conical surface portion arranged adjacent to the main body section. The valve port includes a straight section portion having equal diameters. When the electromagnetic coil applies a zero pulse, the straight section portion is not in contact with the valve needle, and an intersecting surface of a plane, where a top end of the straight section portion is located, and the valve needle is on the first conical surface portion. With the electronic expansion valve, flow can be precisely adjusted at a low-pulse stage, and during assembly, a position of the 0 pulse can be directly obtained by adjusting relative positions of the valve needle and the valve port and by using a flow meter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.