Thermal expansion valve
US9587864B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 27, 2012 |
| Grant date | Mar 7, 2017 |
| Priority date | — |
| Expiry date | Dec 31, 2033 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF25B2600/21
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
A thermal expansion valve comprises a valve body and a valve core member. The valve body is provided with a first connecting chamber, a lower cavity with a transmission member built in, and a first sealing member for separating the first connecting chamber and the lower cavity. A fifth pressure-bearing surface and a sixth pressure-bearing surface, pressed by a cold medium in the first connecting chamber in opposite directions, are disposed on a side wall of the valve core member. The first sealing member comprises a first flexible sealing element, disposed between the transmission member and an upper end portion of the valve core member and having a first edge portion connected to the valve body in a sealing manner. A sum of an effective stress area of a first pressure-bearing surface of the first flexible sealing element and a stress area of the fifth pressure-bearing surface is substantially equal to a sum of an effective stress area of a third pressure-bearing surface of the upper end portion of the valve core member and a stress area of the sixth pressure-bearing surface. Through the design of the structure of the thermal expansion valve, in an aspect, reliability of sealing be…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.