Refrigerator

Details Refrigerator Refrigerator

2006-01-17

2006-01-17

Norman, Marc (Department: 3744)

Refrigeration

Processes

Lubricant handling

C062S192000, C062S471000

Reexamination Certificate

active

06986259

ABSTRACT:
Disclosed is a refrigerating apparatus using a temperature sensitive expansion valve (46) as an expansion mechanism. In the refrigerating apparatus, a switching valve (7a) is disposed on the upstream side of an evaporator (45). The switching valve (7a) is closed for a while, thereby forcibly placing an outlet side of the evaporator (45) in the superheat state to increase the valve travel of the expansion valve (46). Thereafter, the switching valve (7a) is opened for liquid refrigerant to flow through the evaporator (45) so that a wettish operation is carried out. As a result of such arrangement, refrigerating machine oil that has accumulated in the evaporator (45) is reclaimed and returned to a compression mechanism (2D).

REFERENCES:
patent: 5249432 (1993-10-01), Ichikawa
patent: 2002/0112492 (2002-08-01), Suitou et al.
patent: 62-119366 (1987-05-01), None
patent: 5-187380 (1993-06-01), None
patent: 10-47800 (1998-02-01), None
patent: 2001-174082 (2001-06-01), None
patent: 2001-280719 (2001-10-01), None

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