Title:
REFRIGERATION CYCLE DEVICE AND PILOT-OPERATED ON-OFF VALVE
Document Type and Number:
WIPO Patent Application WO/2014/054218
Kind Code:
A1
Abstract:
A refrigeration cycle device is provided with a pilot-operated on-off valve. When the pilot-operated on-off valve (22), which functions as a refrigerant circuit switching device, opens a bypass passage (second refrigerant passage)(14b) for connecting the high-pressure-side section and the low-pressure-side section of the cycle, a pilot valve (222) opens an outlet opening-side connection passage (221d) while a refrigerant passage through which a refrigerant having flowed out of the pilot-operated on-off valve (22) flows is closed. As a result, a main on-off valve (221) opens a main passage (220c) after a refrigerant pressure (P2) on the outlet opening (220b) side is equalized with a high-pressure-side refrigerant pressure (P1) at the inlet opening (220a) so that the refrigerant pressure (P2) is close to the high-pressure-side refrigerant pressure (P1), and consequently, refrigerant flow noise occurring when the pilot-operated on-off valve (22) is opened can be reduced without reducing the high-pressure-side refrigerant pressure.
Inventors:
OHTA HIROMI (JP)
Application Number:
PCT/JP2013/005166
Publication Date:
April 10, 2014
Filing Date:
September 02, 2013
Export Citation:
Assignee:
DENSO CORP (JP)
International Classes:
F25B41/04; B60H1/32; F25B1/00
Foreign References:
| JP2011235753A | 2011-11-24 | |||
| JP2002267294A | 2002-09-18 | |||
| JP2011094884A | 2011-05-12 | |||
| JPH07243547A | 1995-09-19 | |||
| JP2011225039A | 2011-11-10 |
Attorney, Agent or Firm:
KIN, Junhi (JP)
Gold Junki (JP)
Gold Junki (JP)
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