JPH02275291A - Heat exchanger of lamination type - Google Patents

Abstract

PURPOSE:To utilize the heat transfer area effectively and raise the heat exchange performance by laminating alternately plates which form coolant passages of a plurality of kinds and providing in an intermediate portion of the lamination a plate provided with a hole through which a coolant flows, the hole being smaller than the holes in the other plates. CONSTITUTION:A plate 23 is provided which forms at an intermediate position of plates 14 on the primary side and plates 16 on the secondary side which respectively form different coolant passages 16 a flowing-in hole 22 for the coolant the cross section of which is smaller than that in other seal plates 13. While the coolant is flowing in, part of it hits the plate 23 and is stirred and then it flows into respective coolant passages 16 and the other part which passes by the plate 23 hits the end plates 11' and then flows into the respective coolant passages 16. The coolant flows thereby uniformly into respective coolant passages 16.

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 stacked heat exchanger 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 that forms a refrigerant passage on the primary side, and 6 is a plate that forms a refrigerant passage on the secondary side, and a plurality of them are stacked alternately. .

Problems to be Solved by the Invention However, in the above configuration, when the refrigerant is flown and operated, it flows until it hits the end plate on the opposite side, and then flows toward the grate that forms the refrigerant passage. A large amount of refrigerant flows.

There is a problem in that almost no refrigerant flows in the refrigerant passage near the inlet, making it impossible to effectively utilize the heat transfer area and deteriorating heat exchange performance.

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 types of refrigerant passages are alternately stacked, and a plate having a smaller refrigerant inflow hole than other plates is provided in the middle of the plates.

Effects According to the present invention, when the refrigerant is flowed out with the above-described configuration, a part of the refrigerant hits the plate having a small large inflow area at an intermediate portion, and flows into the refrigerant passage of each plate while being stirred. The other passing refrigerant hits the end plate and is stirred.
From there, the refrigerant flows into the refrigerant passages of each plate, and since the refrigerant flows evenly through the refrigerant passages of each plate, the heat transfer area can be used effectively and heat exchange performance is improved.

Example The laminated heat exchanger according to the embodiment of the present invention will be explained below.

This will be explained 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), and 14 and 15 are primary side plates and secondary side plates that constitute different refrigerant passages 16, and are alternately stacked. By providing a plate 23 which forms a refrigerant inflow hole 22 whose large inflow cross section 22 is smaller than that of the other seal plates 13 as shown in FIG. from there to the refrigerant passages 16 of each grate.
The other refrigerant that has passed hits the end plate 11' and flows into the refrigerant passages 16 of each plate.

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 a plate with a large inflow cross section smaller than the other plates located in the middle of each stacked plate, and a part of the refrigerant is agitated by hitting each plate. The refrigerant flows through the refrigerant passages, and the refrigerant flows uniformly through each of the stacked refrigerant passages, 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 grate 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...-? lI plate, 16...
Secondary plate, 16... Refrigerant passage, 22...
...Inflow hole, 23...Plate. 14°゛-1 j9 compensation 1 play

Claims (1)

[Claims] A laminated heat exchanger characterized in that a plurality of types of plates forming refrigerant passages are alternately laminated, and a plate having a smaller refrigerant inflow hole than other plates is provided in the middle of the plates.