Invention Grant
US07690209B2 Refrigerant charging method in refrigeration system using carbon dioxide as refrigerant
失效
使用二氧化碳作为制冷剂的制冷系统中的制冷剂充气方法
- Patent Title: Refrigerant charging method in refrigeration system using carbon dioxide as refrigerant
- Patent Title (中): 使用二氧化碳作为制冷剂的制冷系统中的制冷剂充气方法
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Application No.: US12375578Application Date: 2007-08-08
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Publication No.: US07690209B2Publication Date: 2010-04-06
- Inventor: Hiromune Matsuoka , Toshiyuki Kurihara
- Applicant: Hiromune Matsuoka , Toshiyuki Kurihara
- Applicant Address: JP Osaka
- Assignee: Daikin Industries, Ltd.
- Current Assignee: Daikin Industries, Ltd.
- Current Assignee Address: JP Osaka
- Agency: Global IP Counselors
- Priority: JP2006-218875 20060810
- International Application: PCT/JP2007/065479 WO 20070808
- International Announcement: WO2008/018480 WO 20080214
- Main IPC: F25B45/00
- IPC: F25B45/00
Abstract:
A refrigerant charging method in an air conditioner using carbon dioxide as a refrigerant includes a first refrigerant charging step and a second refrigerant charging step. The first refrigerant charging step is a step of charging a refrigerant charging target portion including refrigerant communication pipes with refrigerant in a gas state until the pressure of the refrigerant charging target portion rises to a predetermined pressure after the start of charging. The second refrigerant charging step is a step of charging the refrigerant charging target portion with refrigerant in a liquid state until the amount of refrigerant charging the refrigerant charging target portion becomes a predetermined amount. The second refrigerant charging step occurring after the first refrigerant charging step.
Public/Granted literature
- US20090133413A1 REFRIGERANT CHARGING METHOD IN REFRIGERATION SYSTEM USING CARBON DIOXIDE AS REFRIGERANT Public/Granted day:2009-05-28
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