Invention Grant
- Patent Title: Electronic expansion valve and methods for calibrating an electronic expansion valve
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Application No.: US15303304Application Date: 2015-05-20
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Publication No.: US10197314B2Publication Date: 2019-02-05
- Inventor: Michael Birkelund
- Applicant: Danfoss A/S
- Applicant Address: DK Nordborg
- Assignee: Danfoss A/S
- Current Assignee: Danfoss A/S
- Current Assignee Address: DK Nordborg
- Agency: McCormick, Paulding & Huber LLP
- Priority: EP14171191 20140604
- International Application: PCT/EP2015/061059 WO 20150520
- International Announcement: WO2015/185356 WO 20151210
- Main IPC: F25B41/06
- IPC: F25B41/06 ; F16K31/06 ; F16K37/00

Abstract:
An electronic expansion valve (1) is provided, comprising an inlet (9), an outlet (8), an armature (2), a stop member (3), a biasing member (4) and a solenoid coil (12). The biasing member (4) provides a biasing force on the armature (2) towards a closing direction while the solenoid coil (12) may be provided with a current to provide a magnetic force on the armature (2) towards an opening direction. It is intended to provide an electronic expansion valve that may be controlled more precisely and has a higher safety. To this end the pressure difference between the inlet pressure and the outlet pressure provides a differential pressure force on the armature (2) towards an opening direction to allow a fluid flow from the inlet (9) to the outlet (8), and furthermore the armature (2) is displaced away from the stop member (3) to allow a fluid flow from the inlet (9) to the outlet (8) if the sum of the magnetic force and the differential pressure force on the armature (2) exceeds the biasing force. The invention furthermore relates to a refrigeration system comprising such an electronic expansion valve as well as a method for calibrating such an electronic expansion valve.
Public/Granted literature
- US20170122631A1 ELECTRONIC EXPANSION VALVE AND METHODS FOR CALIBRATING AN ELECTRONIC EXPANSION VALVE Public/Granted day:2017-05-04
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