JPH0331694A - Lamination type heat exchanger - Google Patents

Abstract

PURPOSE:To make refrigerant to flow uniformly through the refrigerant passages of respective plates and improve heat exchanging performance by a method wherein plates, constituted so as to have inflow holes wherein each sectional area becomes successively smaller than the other plates, are provided between respective alternately laminated plates. CONSTITUTION:A plurality of primary side plates 14 and secondary side plates 15, constituting different refrigerant passages 16 respectively, is laminated alternately on a seal plate 13. Plates 23, on which the inflow holes 22a, 22b of refrigerant, whose sectional area 22 is designed so as to be smaller than the inflow holes on the seal plates 13, are formed, are provided between the laminated plates. According to this method, a part of the refrigerant is collided against the plate 23 sequentially and is mixed upon the inflow of the refrigerant, then, the refrigerant flows through the refrigerant passages 16 of respective plates uniformly. Accordingly, the heat transfer area of respective plates may be utilized effectively and the heat exchanging performance of a heat exchanger may be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a stacked heat exchanger used in an air conditioning system.

BACKGROUND OF THE INVENTION A conventional laminated heat exchanger as shown in Japanese Patent Application Laid-Open No. 60-253794 will be described below with reference to the drawings.

FIG. 3 shows a cross section of a conventional laminated heat exchanger, and FIG. 4 shows an external view. 1 is an end plate, 2 is an inlet/outlet, 3 is a seal plate, 4 is a plate forming a refrigerant passage on the primary side, 6 is a grate forming a refrigerant passage on the secondary side,
Multiple layers are alternately stacked.

Problems to be Solved by the Invention However, in the above configuration, when the refrigerant is flown and operated, the refrigerant flows until it hits the end plate on the opposite side, and then flows toward the plate forming the refrigerant passage, so that the refrigerant near the end plate A large amount of refrigerant flows in the passage, and almost no refrigerant flows in the refrigerant passage near the inlet, making it impossible to use the heat transfer area effectively and causing a problem in that heat exchange performance deteriorates.

Means for Solving the Problems In order to solve the above problems, the laminated heat exchanger of the present invention has the following features:
In this structure, plates forming a plurality of refrigerant passages are alternately stacked, and plates having inlet holes successively smaller than other plates are provided at intervals from the refrigerant inlet side.

Effects of the present invention When the refrigerant is caused to flow through the above-described configuration, a portion of the inflowing refrigerant hits the plates whose large inflow areas are successively reduced, is stirred, and flows into the refrigerant passages of each plate, so that the refrigerant is Since the refrigerant flows evenly through the refrigerant passages of each plate, the heat transfer area can be used effectively and the heat exchange performance can be improved.

EXAMPLE Hereinafter, a stacked heat exchanger according to an example of the present invention will be described with reference to the drawings.

FIG. 1 shows a cross section of a laminated heat exchanger according to an embodiment of the present invention, in which 11 is an end plate, 12 is a refrigerant inlet/outlet part, 1
3 is a seal plate, 14. j5 is a plurality of primary side plates and secondary side plates, each of which constitutes a different refrigerant passage 16, which are alternately stacked. By providing plates 23 between the laminated plates forming refrigerant inflow holes 22&, 22b, the large inflow cross sections 22 of which are sequentially smaller than those of the other seal plates 13, as shown in FIG. : When the refrigerant flows in, a portion of the refrigerant is sequentially hit and stirred, and flows from there into the refrigerant passages 16 of each plate, so that the refrigerant flows uniformly into each refrigerant passage 16.

As described above, according to this embodiment, the refrigerant can flow uniformly into each refrigerant passage 16.

Effects of the Invention As described above, the present invention provides plates in which the large inflow cross section is smaller than the other plates in order between each laminated plate, and a part of the refrigerant is agitated by hitting the refrigerant passages of each plate. The refrigerant flows uniformly through each of the refrigerant passages that are stacked and extended, allowing effective use of the original heat transfer area and improving heat exchange performance.

[Brief explanation of drawings]

Fig. 1 is a cross-sectional view of a laminated heat exchanger according to an embodiment of the present invention, Fig. 2 is a plan view of a plate provided with inlet holes of the present invention, and Fig. 3 is a cross-sectional view of a conventional laminated heat exchanger. , FIG. 4 is an external perspective view of the laminated heat exchanger. 14...-Next side plate, 16...Secondary side plate, 16...Refrigerant passage, 22, 22
a, 22b...Inflow hole, 23...Plate.

Claims (1)

[Claims] A laminated heat exchanger characterized in that a plurality of types of plates forming refrigerant passages are alternately laminated, and the plates have inlet holes that are successively smaller than other plates at intervals from the refrigerant inlet side. .