US 6,742,577 B2Granted

Laminate type evaporator

AssigneeMitsubishi Heavy Industries, Ltd.

InventorsYasunobu Joboji, Koji Nakado, Katsuhiro Saito

Life of this patent

Estimating the term…

Loading patent…

Abstract

At the refrigerant inlet/outlet side surface portion of laminated flat tubes, there is provided a first side refrigerant passage, and in the upper portion of the other side surface portion, there is provided a second side refrigerant passage, and in the lower portion thereof a third side refrigerant passage. A first partition portion is provided in first lower tank portions of the laminated flat tubes, and a second partition portion is provided in second upper tank portions. The first partition portion and the second partition portion respectively divide the laminated first lower tank portions and the second upper tank portions such that the ratio of the number of flat tubes on the refrigerant inlet/outlet side surface portion side, n4, to the number of flat tubes on the opposite side surface portion side, n3, is approximately 2:1.

Claims9

Dependent claims

A laminate type evaporator in which a large number of refrigerant tubes including at least a pair of first and second refrigerant flow passages are laminated together, comprising:

a refrigerant tube group in which a pair of first and second upper tank portions are respectively arranged at one end of the first and second refrigerant flow passages and in which a pair of first and second lower tank portions are respectively arranged at the other end of the first and second flow passages;
a refrigerant inlet arranged on the first upper tank portion side of the refrigerant tube at one end of the refrigerant tube group;
a refrigerant outlet arranged on the second upper tank portion side of the refrigerant tube at said one end;
a first side refrigerant passage communicating the refrigerant inlet with the first lower tank portion of the refrigerant tube at said one end;
a second side refrigerant passage communicating the first upper tank portion with the second upper tank portion of the refrigerant tube at the other end of the refrigerant tube group;
a third side refrigerant passage communicating the first lower tank portion with the second lower tank portion of the refrigerant tube at said other end;
a first partition portion arranged in the first lower tank portions of the refrigerant tube group;
and
a second partition portion arranged in the second upper tank portions of the refrigerant tube group,
wherein the first partition portion and the second partition portion are arranged such that they divide the refrigerant tube group into three refrigerant flow passage groups sequentially circulating all refrigerant introduced from the refrigerant inlet from the first lower tank portion of the refrigerant tube at said one end through all three refrigerant flow passage groups to the second upper tank portion of the refrigerant tube at said one end.

7 more elements

A laminate type evaporator in which a large number of refrigerant tubes including at least a pair of first and second refrigerant flow passages are laminated together, comprising:

a refrigerant tube group in which a pair of first and second upper tank portions are respectively arranged at one end of the first and second refrigerant flow passages and in which a pair of first and second lower tank portions are respectively arranged at the other end of the first and second flow passages;
a refrigerant inlet arranged on the first upper tank portion side of the refrigerant tube at one end of the refrigerant tube group;
a refrigerant outlet arranged on the second upper tank portion side of the refrigerant tube at said one end;
a first side refrigerant passage communicating the refrigerant inlet with the first lower tank portion of the refrigerant tube at said one end;
a second side refrigerant passage communicating the first upper tank portion with the second upper tank portion of the refrigerant tube at the other end of the refrigerant tube group;
a third side refrigerant passage communicating the first lower tank portion with the second lower tank portion of the refrigerant tube at said other end;
a first partition portion arranged in the first lower tank portions of the refrigerant tube group;
and
a second partition portion arranged in the second upper tank portions of the refrigerant tube group,
wherein the first partition portion and the second partition portion are arranged such that they divide the refrigerant tube group into three refrigerant flow passage groups sequentially circulating refrigerant introduced from the refrigerant inlet from the first lower tank portion of the refrigerant tube at said one end to the second upper tank portion of the refrigerant tube at said one end, and
wherein the first partition portion and the second partition portion are arranged at positions such that approximately ⅔ of the total laminated refrigerant tubes exist between them and the side surface portion on the refrigerant inlet side.

8 more elements

Dependencies are inferred from the claim text.

Facts

Application: 10/319,662Filed 16 Dec 2002
Priority: JP 2002-00371610 Jan 2002
Published: US 2003/0127217 A110 Jul 2003
Granted: 1 Jun 2004
Term ends: Not estimatedThe source records don’t support an estimate.

Classification3 codes

F28D 1/0333
The plates having lateral openings therein for circulation of the heat-exchange medium from one conduit to another: the plates having integrated…
F28D 2021/0085
For vehicles: evaporators
F28D
Heat-exchange apparatus, not provided for in another subclass, in which the heat-exchange