Title:
冷凍装置の配管洗浄装置および配管洗浄方法
Document Type and Number:
Japanese Patent JP3840565
Kind Code:
B2
Abstract:
A piping cleaning system switches over a four-way switching valve 43 of a heat pump circuit 200 so that two transfer heat exchangers 25, 26 are operated alternately as a cooling device and a heating device, by which a cleaning refrigerant in a cleaning circuit 2 is circulated through a gas line 3 and a liquid line 5. During this cleaning operation with the cleaning refrigerant circulated, when the cleaning refrigerant runs short in amount, a solenoid valve SV3 is opened so that cleaning refrigerant of the refrigerant cylinder 71 is resupplied through a refrigerant resupply line 72 to either one of the transfer heat exchangers 25 or 26 that is cooling. On the other hand, when the cleaning refrigerant is excessive, a solenoid valve SV4 is opened so that the cleaning refrigerant is returned to the refrigerant cylinder 71 through a refrigerant bleed line 73. Thus, the amount of cleaning refrigerant can be maintained at an appropriate level.
Inventors:
Takeo Ueno
Toshihiro Iijima
Masaaki Takegami
Toshihiro Iijima
Masaaki Takegami
Application Number:
JP51535399A
Publication Date:
November 01, 2006
Filing Date:
September 08, 1998
Export Citation:
Assignee:
Daikin Industries, Ltd.
International Classes:
F25B47/00; F25B45/00; F28G9/00
Domestic Patent References:
| JP7127953A | ||||
| JP4254173A | ||||
| JP61186768A | ||||
| JP6221727A |
Foreign References:
| WO1997015789A1 |
Attorney, Agent or Firm:
Aoyama Aoi
Hiroshi Yamazaki
Hiroshi Yamazaki
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