EP 1669703 A1 20060614 - Expansion valve
Title (en)
Expansion valve
Title (de)
Entspannungsventil
Title (fr)
Vanne de détente
Publication
Application
Priority
- JP 2004354142 A 20041207
- JP 2005283622 A 20050929
Abstract (en)
A damper chamber 23 of an expansion device is formed by a cylinder 16 in a housing 10 defining a valve seat 14. A piston 17 is integral with a valve element 15. When the valve element 15 undergoes a sudden pressure change, the volume of a damper chamber 23 changes to accommodate sudden motion of the valve element 15, whereby vibrations of the valve element 15 are suppressed, to reduce generation of untoward noise. The ratio (b/a) between the valve element diameter (b) and a port diameter (a) of a valve hole (13) is set to be less than 1.5 so as to suppress a valve element suction phenomenon and to establish a flow rate corresponding to the value of a differential pressure between primary and secondary pressures.
IPC 8 full level
F25B 41/06 (2006.01)
CPC (source: EP KR US)
F25B 41/30 (2021.01 - EP KR US); F25B 2341/063 (2013.01 - EP KR US); F25B 2500/01 (2013.01 - EP KR US); F25B 2500/12 (2013.01 - EP KR US); F25B 2600/2505 (2013.01 - EP KR US)
Citation (search report)
- [XY] EP 1167899 A2 20020102 - TGK CO LTD [JP]
- [X] US 5117647 A 19920602 - VALBJORN KNUD V [DK]
- [A] US 6305414 B1 20011023 - KOZINSKI RICHARD C [US]
- [A] EP 1335160 A2 20030813 - TGK CO LTD [JP]
- [A] EP 1092929 A2 20010418 - TGK CO LTD [JP]
- [Y] PATENT ABSTRACTS OF JAPAN vol. 2003, no. 06 3 June 2003 (2003-06-03)
- [A] PATENT ABSTRACTS OF JAPAN vol. 1999, no. 14 22 December 1999 (1999-12-22)
Designated contracting state (EPC)
DE FR
DOCDB simple family (publication)
EP 1669703 A1 20060614; JP 2006189240 A 20060720; KR 20060063730 A 20060612; US 2006117793 A1 20060608
DOCDB simple family (application)
EP 05026630 A 20051206; JP 2005283622 A 20050929; KR 20050117811 A 20051206; US 29327805 A 20051205