REFRIGERATION CYCLE

WIPO Patent Application WO/2011/013540

A1

Provided is a refrigeration cycle suitable for an air conditioner for a vehicle, wherein the flow rate of a refrigerant which is used to estimate a torque of a compressor can be precisely estimated by accurately detecting a difference between the pressures before and after an orifice, and thus, the torque of the compressor can be precisely estimated, and the estimate can be achieved while achieving space savings and a reduction of the cost. The refrigeration cycle has a subcool condenser which is integrally provided with a condensing part for a refrigerant, a liquid receiver, and a subcooling part. An orifice which restricts the flow of the refrigerant which has passed through the condensing part of the subcool condenser is arranged in the subcool condenser. A pressure difference detection means which can detect a difference between the pressures before and after the orifice, a refrigerant flow rate estimate means for estimating the flow rate of the refrigerant with reference to the detected pressure difference, and a compressor torque estimate means for estimating the torque of the compressor with reference to the estimated flow rate of the refrigerant are provided.

JP2009184493	AIR CONDITIONING SYSTEM FOR VEHICLE
WO/2004/074019	POWER SUPPLY SYSTEM FOR A MOTOR VEHICLE
JP2012076636	BRAKE CONTROL DEVICE OF VEHICLE

ISHIZEKI TETSUYA (JP)
INOUE ATSUO (JP)
TSUBOI MASATO (JP)
SUZUKI KENICHI (JP)

PCT/JP2010/062188

February 03, 2011

July 20, 2010

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SANDEN CORP (JP)
ISHIZEKI TETSUYA (JP)
INOUE ATSUO (JP)
TSUBOI MASATO (JP)
SUZUKI KENICHI (JP)

B60H1/32; F04B49/06; F25B49/02

JPH0650615A	1994-02-25
JP2009063179A	2009-03-26
JP2003278663A	2003-10-02
JPH0650615A	1994-02-25

See also references of EP 2460676A4

SAKAMOTO TOMOHIRO (JP)
Tomohiro Sakamoto (JP)

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