Title:
AIR-CONDITIONING HOT-WATER SUPPLY SYSTEM
Document Type and Number:
WIPO Patent Application WO/2011/045976
Kind Code:
A1
Abstract:
An air-conditioning hot-water supply system configured in such a manner that an ejector can function effectively in both cooling operation and heating operation and that the consumption of electric power by an air-conditioning refrigerant circuit is reduced.
An air-conditioning refrigerant circuit (10) operated so as to be switched between cooling operation and heating operation is composed of: a high-temperature-side refrigerant circuit which comprises the discharge section (18c) of an ejector (18), a compressor (11), a four-way valve (12b), an intermediate heat exchanger (90), a second heat exchanger (17b), and the nozzle section (18a) of the ejector; and a low-temperature-side refrigerant circuit which comprises the discharge section (18c) of the ejector, the compressor (11), a four-way valve (12a), a heat exchanger (13a), an expansion valve (14), an expansion valve (16), a first heat exchanger (17a), and the suction section (18b) of the ejector. Refrigerant piping of the low-temperature-side refrigerant circuit, which connects the expansion valve (14) and the expansion valve (16), is joined to refrigerant piping of the high-temperature-side refrigerant circuit, which connects the intermediate heat exchanger (90) and the second heat exchanger (17b), to form a common refrigerant circuit into which the refrigerant flows from both the high-temperature-side refrigerant circuit and the low-temperature-side refrigerant circuit, and an air-conditioning expansion valve (15) is mounted in the common refrigerant circuit.
Inventors:
KOTANI MASANAO (JP)
KOMATSU TOMOHIRO (JP)
SEKIYA SACHIO (JP)
KOKUGAN YOKO (JP)
KUSUMOTO HIROSHI (JP)
KOMATSU TOMOHIRO (JP)
SEKIYA SACHIO (JP)
KOKUGAN YOKO (JP)
KUSUMOTO HIROSHI (JP)
Application Number:
PCT/JP2010/063638
Publication Date:
April 21, 2011
Filing Date:
August 11, 2010
Export Citation:
Assignee:
HITACHI LTD (JP)
KOTANI MASANAO (JP)
KOMATSU TOMOHIRO (JP)
SEKIYA SACHIO (JP)
KOKUGAN YOKO (JP)
KUSUMOTO HIROSHI (JP)
KOTANI MASANAO (JP)
KOMATSU TOMOHIRO (JP)
SEKIYA SACHIO (JP)
KOKUGAN YOKO (JP)
KUSUMOTO HIROSHI (JP)
International Classes:
F25B41/00; F25B1/00; F25B7/00
Foreign References:
| JP2004309093A | 2004-11-04 | |||
| JPH0432669A | 1992-02-04 | |||
| JPH04260759A | 1992-09-16 | |||
| JPS61101771A | 1986-05-20 | |||
| JP2001147050A | 2001-05-29 |
Attorney, Agent or Firm:
The Patent Body Corporate TAKEWA INTERNATIONAL PATENT OFFICE (JP)
Patent business corporation Takekazu international patent firm (JP)
Patent business corporation Takekazu international patent firm (JP)
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