초록 ▼

A heat exchanger is made of a metal such as aluminum and for use in the air conditioning apparatuses such as the car coolers and the room air conditioners. A coolant inlet pipe (6) has an end which is forced into a pipe insertion bore (10) of a pipe joint (8) for connection to an external piping, wi

A heat exchanger is made of a metal such as aluminum and for use in the air conditioning apparatuses such as the car coolers and the room air conditioners. A coolant inlet pipe (6) has an end which is forced into a pipe insertion bore (10) of a pipe joint (8) for connection to an external piping, with a cylindrical brazing agent piece (15) being interposed between the outer periphery of the inlet pipe end and the inner peripheral wall of the bore, such that the pipe (6) is brazed integral to the joint (8) by means of the cylindrical piece (15). This cylindrical brazing agent piece (15) is composed of a core layer which has an outer and inner surfaces clad with a brazing agent layer. The pipe (6) and the joint (8) can be preassembled without failing to interpose between them the brazing agent piece (15), so that said pipe and said joint can be brazed one to another surely and at a lowered cost.

대표청구항 ▼

[ We claim:] [1.] A heat exchanger comprising: a heat exchanger body; a connection pipe extending therefrom for flowing a heat exchanging medium, the connection pipe including a beaded portion extending outwardly of the rest of the connection pipe; a pipe joint having a cylindrical bore for receivin

[ We claim:] [1.] A heat exchanger comprising: a heat exchanger body; a connection pipe extending therefrom for flowing a heat exchanging medium, the connection pipe including a beaded portion extending outwardly of the rest of the connection pipe; a pipe joint having a cylindrical bore for receiving an end portion of the connection pipe; and a cylindrical brazing agent piece with a portion interposed between an outer periphery of the end portion and an inner periphery of the bore and with another portion interposed between the beaded portion and an area adjacent the bore on the pipe joint for brazing the beaded portion to the adjacent area; the inner periphery of the bore, the outer periphery of the end portion, and the portion of the brazing agent interposed therebetween defining a plurality of cavities around the end portion of the connection pipe when the pipe, the joint and the agent are assembled before brazing; wherein the end portion of the connection pipe is forcibly and tightly fitted in the cylindrical bore and is brazed integral therewith due to the interposed cylindrical brazing agent piece.