1)通風方向に並んで配置された冷媒入口ヘッダ部および冷媒出口ヘッダ部と、両ヘッダ部を通じさせる冷媒循環経路と、積層された第１プレートおよび第２プレートを有し、かつ冷媒入口ヘッダ部および冷媒出口ヘッダ部に跨って接合された冷媒入出部材と、両端が開口した冷媒通路を有し、かつ冷媒入出部材に接合された熱交換器用接続装置とを備えており、冷媒入口ヘッダ部の一端に冷媒入口が形成されるとともに、冷媒出口ヘッダ部における冷媒入口と同一端に冷媒出口が形成され、冷媒入口から冷媒入口ヘッダ部内に流入した冷媒が、冷媒循環経路を通って冷媒出口ヘッダ部に戻り、冷媒出口から送り出されるようになっており、冷媒入出部材の両プレート間に、一端が冷媒入口ヘッダ部の冷媒入口に通じるとともに他端が冷媒入出部材の１つの側縁部に開口した入口となっている流入路、および一端が冷媒出口ヘッダ部の冷媒出口に通じるとともに他端が冷媒入出部材における流入路が開口した側縁部に開口した出口となっている流出路が、第１プレートおよび第２プレートを外方に膨出させることにより形成され、流入路の入口側端部および流出路の出口側端部が筒状となされ、熱交換器用接続装置の各冷媒通路の一端開口の周囲に、冷媒入出部材の流入路の入口側端部内および流出路の出口側端部内に嵌められる筒状の嵌合凸部が設けられ、熱交換器用接続装置の嵌合凸部が冷媒入出部材の流入路の入口側端部内および流出路の端部内に嵌め入れられて冷媒入出部材にろう付されている熱交換器であって、
冷媒入出部材の第１プレートにおける流入路用外方膨出部の入口側端部の内周面、および流出路用外方膨出部の出口側端部の内周面と、これらの外方膨出部の両側の非膨出部の内面との連接部にそれぞれ丸みが存在するとともに、第２プレートにおける流入路用外方膨出部の入口側端部の内周面、および流出路用外方膨出部の出口側端部の内周面と、これらの外方膨出部の両側の非膨出部の内面との連接部にそれぞれ丸みが存在し、第１および第２プレートの上記丸みと熱交換器用接続装置の嵌合凸部との間に隙間が形成され、
冷媒入出部材の流入路および流出路における熱交換器用接続装置の嵌合凸部が嵌められている部分の両側において、第１プレートと第２プレートとの間に、第１および第２プレートと嵌合凸部とのろう付性を向上させるろう付補助プレートが配置されており、ろう付補助プレートにおける熱交換器用接続装置の嵌合凸部側の縁部が、第１および第２プレートの上記丸みと熱交換器用接続装置の嵌合凸部との間の上記隙間内に入り込んで嵌合凸部の外周面に近接し、冷媒入出部材の第１および第２プレートと熱交換器用接続装置の嵌合凸部とろう付補助プレートとがろう付されている熱交換器。
1) A refrigerant inlet header portion and a refrigerant outlet header portion arranged side by side in the ventilation direction, a refrigerant circulation path that passes through both header portions, a stacked first plate and second plate, and a refrigerant inlet header portion And a refrigerant inlet / outlet member joined across the refrigerant outlet header, and a heat exchanger connecting device having a refrigerant passage open at both ends and joined to the refrigerant inlet / outlet member. A refrigerant inlet is formed at one end, a refrigerant outlet is formed at the same end as the refrigerant inlet in the refrigerant outlet header portion, and the refrigerant flowing into the refrigerant inlet header portion from the refrigerant inlet passes through the refrigerant circulation path and passes through the refrigerant outlet header portion. , And one end leads to the refrigerant inlet of the refrigerant inlet header part between the two plates of the refrigerant inlet / outlet member and the other end of the refrigerant inlet / outlet. An inflow passage serving as an inlet opening at one side edge of the material, and an outlet opening at one end leading to the refrigerant outlet of the refrigerant outlet header portion and the other end at the side edge opening of the inflow passage in the refrigerant inlet / outlet member The outflow path is formed by bulging the first plate and the second plate outward, the inlet side end of the inflow path and the outlet side end of the outflow path are cylindrical, and heat exchange Around the opening of one end of each refrigerant passage of the connection device for the vessel, a cylindrical fitting convex portion that is fitted into the inlet side end portion of the inlet / outlet passage of the refrigerant inlet / outlet member and the outlet side end portion of the outlet passage is provided. A heat exchanger in which the fitting convex portion of the connecting device is fitted into the inlet side end portion of the inflow path and the end portion of the outflow path of the refrigerant input / output member and brazed to the refrigerant input / output member,
The inner peripheral surface of the inlet side end portion of the inflow passage outward bulging portion, the inner peripheral surface of the outlet side end portion of the outflow passage outer bulging portion, and the outer sides thereof in the first plate of the refrigerant inlet / outlet member Roundness is present in each of the connecting portions with the inner surfaces of the non-bulged portions on both sides of the bulging portion, and the inner peripheral surface of the inlet side end portion of the outer bulging portion for the inflow passage in the second plate and for the outflow passage A roundness exists at the connecting portion between the inner peripheral surface of the outlet side end portion of the outward bulging portion and the inner surface of the non-bulging portion on both sides of the outer bulging portion, and the first and second plates A gap is formed between the roundness and the fitting convex part of the connection device for heat exchanger,
The first and second plates are fitted between the first plate and the second plate on both sides of the portion where the fitting convex portion of the connection device for the heat exchanger is fitted in the inlet and outlet passages of the refrigerant inlet / outlet member. A brazing auxiliary plate for improving the brazing performance with the joint convex portion is arranged, and the edge portion on the fitting convex portion side of the connecting device for heat exchanger in the brazing auxiliary plate is the above-mentioned of the first and second plates. The first and second plates of the refrigerant inlet / outlet member and the connection device for the heat exchanger are inserted into the gap between the roundness and the fitting projection of the connection device for the heat exchanger and close to the outer peripheral surface of the fitting projection. A heat exchanger in which a fitting convex part and a brazing auxiliary plate are brazed.