JPH028694A - Layered type heat exchanger - Google Patents

Abstract

PURPOSE:To improve a productivity with a superior brazing material by a method wherein the external size of a plate having a brazing material of one type is made smaller than that of another type, both selected from two types of piled alternately plates having a brazing material and recessed portions forming coolant passages. CONSTITUTION:Plates 12 having brazing material forming recessed portions constituting a coolant passage have a smaller external size than that of plates 11 having brazing material forming recessed portions constituting a different coolant passage and these plates are alternately piled in layers. When brazed within a furnace, the molten brazing material stays in a brazing material reservoir 13 due to layers having different outer shape and sizes. The brazing material may not flows out and a superior brazing can be performed. With this arrangement, it is possible to perform a superior brazing without any leakage and further it is possible to improve a productivity.

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. 2 shows a sectional view of the main parts of a conventional laminated heat exchanger. Reference numeral 1 denotes an end plate having an entry/exit lever (not shown) on one end thereof. Reference numeral 2 denotes a plate with brazing material, and a plurality of two types of plates 2 with brazing material having the same size and having a recess (not shown) forming a refrigerant passage are alternately stacked.

FIG. 3 is an external view of the laminated heat exchanger.

Problems to be Solved by the Invention However, with the above configuration, when brazing in a furnace etc., since the external dimensions of the laminated plates with solder metal are the same, the molten solder metal flows in the direction of gravity. However, there were problems in that good brazing could not be achieved, causing leakage, resulting in poor yield and poor productivity.

In view of the above-mentioned problems, the present invention provides a laminated heat exchanger that allows good brazing and has high productivity.

Means for Solving the Problems In order to solve the above-mentioned problems, the laminated heat exchanger TG of the present invention has one of two types of plates with brazing material formed with recesses forming refrigerant passages. It is smaller than the other types of brazing plates, and has a structure in which two types of brazing plates are alternately stacked.

Effects The present invention has the above-described configuration, so that when brazing in a furnace or the like, the solder metal that melts out stays there without flowing outside due to the different external dimensions of the solder metal. This allows for good brazing and no leakage.
This will greatly improve productivity.

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 main part of a 4a layer heat exchanger according to an embodiment of the present invention, in which 11 is a plate with brazing material forming four parts constituting a refrigerant passage, and 12 is a refrigerant passage different from 11. A plurality of brazing plates forming the four parts of the brazing plate 1 have a smaller external dimension than the brazing plate 1, and are laminated alternately.

When brazing in a furnace or the like, the melted brazing material stays in the brazing material pool 13 because of the laminated layers having different external dimensions, and does not flow out to the outside, allowing for good brazing.

As described above, according to this embodiment, the solder metal plates forming the four parts constituting the refrigerant passage are made to have different external dimensions in 11.12, and are stacked to form a braze plate and retain the solder metal. , it is possible to perform good brazing without leakage, and productivity can be improved.

Effects of the Invention As described above, the present invention provides two types of brazing plates each having four parts constituting a refrigerant passage, and the external dimensions of one type of brazing plate are set to be the same as those of another type of brazing plate. By making the wires smaller and layering them alternately, good brazing without leakage is possible and productivity can be improved.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of main parts of a laminated heat exchanger according to an embodiment of the present invention, FIG. 2 is a cross-sectional view of main parts of a conventional laminated heat exchanger,
FIG. 3 is an external perspective view of the laminated heat exchanger. 11. 12... Plate with brazing material, 13...
...Brazing material accumulation area.

Claims (1)

[Claims] A plurality of two types of plates with brazing material each having a concave portion forming a refrigerant passage are laminated alternately, end plates are formed on both the upper and lower sides, and one type of plate has the external dimensions of the other type. A laminated heat exchanger that is smaller than a brazed plate.