Title:
FLOW RATE DETECTION DEVICE AND VARIABLE DISPLACEMENT COMPRESSOR
Document Type and Number:
WIPO Patent Application WO/2015/098697
Kind Code:
A1
Abstract:
[Problem] A flow rate detection device for detecting parameters such as a refrigerant discharge flow rate of a variable displacement compressor, wherein the backflow prevention function of a non-return valve is ensured while the non-return valve is also used as a throttle for detecting flow rate to simplify the configuration. [Solution] The device is provided with: a spool (252) that receives upstream-side pressure of the non-return valve on one pressure-receiving surface and downstream-side pressure on another pressure-receiving surface, and slides through a housing (251) due to the balance between the difference in these pressures and a compression coil spring (253); and a sensor (a magnetic detection unit (256)) for detecting the position of the spool (252) to detect the flow rate, the housing (251) having a position-regulating part (regulating surface (251a3)) for regulating the position of the spool (252) and closing the air gap between the housing (251) and the spool (252) when the pressure difference is equal to or less than a prescribed value.
Inventors:
ITO TAKAHIRO (JP)
TAGUCHI YUKIHIKO (JP)
TAGUCHI YUKIHIKO (JP)
Application Number:
PCT/JP2014/083563
Publication Date:
July 02, 2015
Filing Date:
December 18, 2014
Export Citation:
Assignee:
SANDEN HOLDINGS CORP (JP)
International Classes:
F04B27/08; F16K37/00; G01F1/38
Foreign References:
| JP2008107282A | 2008-05-08 | |||
| JP2008121636A | 2008-05-29 | |||
| JPS62259016A | 1987-11-11 | |||
| US4011650A | 1977-03-15 |
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