HEAT PUMP DEVICE, TWO-STAGE COMPRESSOR, AND METHOD OF OPERATING HEAT PUMP DEVICE

Title:

HEAT PUMP DEVICE, TWO-STAGE COMPRESSOR, AND METHOD OF OPERATING HEAT PUMP DEVICE

Document Type and Number:

WIPO Patent Application WO/2011/055444

Kind Code:

A1

Abstract:

A two-stage compressor and a heat pump device using a two-stage compressor operate with improved efficiency when the load is low. A heat pump device is provided with a main refrigerant circuit formed by sequentially connecting by piping a two-stage compressor (100), a first heat exchanger, a first expansion mechanism, and a second heat exchanger. When the load is higher than a predetermined load, the two-stage compressor (100) discharges to a refrigerant circuit a refrigerant compressed in two stages by a low-stage compression section (10) and a high-stage compression section (30). When the load is lower than the predetermined load, the two-stage compressor (100) causes the refrigerant compressed by the low-stage compression section (10) to bypass the high-stage compression section (30) without the refrigerant being compressed by the high-stage compression section (30) and discharges the refrigerant to the main refrigerant circuit.

More Like This:

JPS586983	[Title of the device] Behn type compressor
WO/2002/064389	ON-VEHICLE AIR CONDITIONER
JP4385565	Rotary compressor

Inventors:

TANI MASAO (JP)
FUKAYA ATSUYOSHI (JP)
NAKAGAWA HIROYUKI (JP)
KATO TARO (JP)

Application Number:

PCT/JP2009/068963

Publication Date:

May 12, 2011

Filing Date:

November 06, 2009

Export Citation:

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Assignee:

MITSUBISHI ELECTRIC CORP (JP)
TANI MASAO (JP)
FUKAYA ATSUYOSHI (JP)
NAKAGAWA HIROYUKI (JP)
KATO TARO (JP)

International Classes:

F04C23/00; F04B49/06; F04C28/26; F04C28/28

Foreign References:

JPH05133367A	1993-05-28
JPH0211886A	1990-01-16
JPH05133367A	1993-05-28
JPH0211886A	1990-01-16

Other References: