Title:
AIR CONDITIONER
Document Type and Number:
WIPO Patent Application WO/2007/026620
Kind Code:
A1
Abstract:
An air conditioner in which generation of passing sound of refrigerant is suppressed in
an expansion valve and a utilization-side heat exchanger or in the refrigerant piping
from an expansion valve to a utilization-side heat exchanger. The air conditioner
comprises a main refrigerant circuit having a compressor, a heat source-side
heat exchanger, a utilization-side heat exchanger and an expansion valve, a
bypass refrigerant circuit for returning a part of refrigerant supplied from
the heat source-side heat exchanger to the expansion valve back to the suction side
of the compressor after branching it from the main refrigerant circuit, a cooler
for cooling refrigerant being supplied from the heat source-side heat exchanger
to the expansion valve by refrigerant flowing through the bypass refrigerant circuit,
and a control section for controlling a bypass expansion valve in the bypass refrigerant
circuit such that the degree of superheat of refrigerant flowing through the
bypass refrigerant circuit has a predetermined value at the outlet of the cooler.
If the outdoor air temperature is lower than a predetermined level when the compressor
is started or the number of operating utilization-side heat exchangers is altered,
the control section closes the bypass expansion valve until a predetermined
time elapses.
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Inventors:
SANGENYA HIDEKI (JP)
MURATA KATSUNORI (JP)
KITAGAWA TAKESHI (JP)
MURATA KATSUNORI (JP)
KITAGAWA TAKESHI (JP)
Application Number:
PCT/JP2006/316771
Publication Date:
March 08, 2007
Filing Date:
August 25, 2006
Export Citation:
Assignee:
DAIKIN IND LTD (JP)
SANGENYA HIDEKI (JP)
MURATA KATSUNORI (JP)
KITAGAWA TAKESHI (JP)
SANGENYA HIDEKI (JP)
MURATA KATSUNORI (JP)
KITAGAWA TAKESHI (JP)
International Classes:
F25B1/00; F25B13/00; F25B49/02
Foreign References:
| JP2005069566A | 2005-03-17 | |||
| JPH074756A | 1995-01-10 | |||
| JPH1068553A | 1998-03-10 | |||
| JPH06265232A | 1994-09-20 | |||
| JPH085185A | 1996-01-12 |
Attorney, Agent or Firm:
ONO, Yukio et al. (South Forest Bldg. 1-4-19, Minamimori-machi, Kita-k, Osaka-shi Osaka 54, JP)
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