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US 5,172,759 AGranted
Plate-type refrigerant evaporator
AssigneeNippondenso Co., Ltd.
InventorsMasahiro Shimoya, Tadashi Nakabou, Yoshiyuki Yamauchi
Life of this patent
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Abstract
A plate-type heat exchanger comprises a stack of flat tubes each composed of a pair of confronting core plates jointed to each other and defining a fluid passage. A cross sectional area of the fluid passage is increased along the flowing direction of tbe refrigerant. A plurality of ribs are disposed on the fluid passage. A flowing resistance of the ribs which are disposed near an outlet tank is lower than that of the ribs which are disposed near an inlet tank.
Claims5
A plate-type refrigerant evaporator comprising:
- a plurality of flat tubes each formed by two core pates sealingly jointed together;
- each flat tube including an inlet tank portion and an outlet tank portion and defining a fluid passage therein, the fluid passage being communicated at its opposite ends with the tank portions and a cross sectional area of the fluid passage being increased along a flowing direction of the refrigerant;
- first ribs having a relatively high flowing resistance and being disposed on the fluid passage in a vicinity of the inlet tank portion,
- second ribs having a relatively low flowing resistance and being disposed on the fluid passage in a vicinity of the outlet tank portion;
- and
- a corrugated fin interposed between and secured to adjacent core plates of each adjacent pain of the flat tubes.
3 more elements
Dependencies are inferred from the claim text.