Abstract:
The copper inlet and outlet tube arrangements for an essentially all aluminum coil comprised of aluminum fins, hairpin tubes, and return bends, are ultrasonically soldered to open ends of the hairpin tubes at the same time as the return bends are soldered to the hairpin tubes in an ultrasonic soldering bath; with any bonds of the copper inlet and outlet tube arrangements, such as connections to an expansion device and a connection to a suction header being located at an elevation above the solder bath to preclude contamination of the bath from the bonds.
Abstract:
The present invention relates to the making of an evaporator or condenser construction wherein ends of heat exchange tubes extending through heat exchange plates or fins are joined with return bend connectors. The ends of the tubes are provided with flared cups that telescopically receive the ends of return bend connectors. Nibs are formed on the outer surface of and extend outwardly a predetermined amount from the outer surface of the return bend connectors near the ends thereof. Grooves are formed on said outer surface and extend longitudinally between each nib and the end of the connector. When the end of a return bend connector is inserted into a flared cup, an interference fit between the nibs and the cup centers the end of the connector in the cup and frictionally retains the tube and the return bend in assembled relation when the assembly is inverted and thereafter submerged in a solder bath. The grooves provide vents for hot gases during the soldering operation.
Abstract:
A process of joining metals by directing a focused electron beam on a joint to be welded and by moving the beam longitudinally of the joint whereby the adjoining walls of the work are melted and flow together to form a seam weld. The intensity of the beam is sufficient to penetrate to a depth which is substantially greater than the width of the melted portion to produce a deep narrow weld. If spot welds are desired the step of moving may be omitted. Along with the steps above recited the beam may be oscillated back and forth across the joint with a magnitude of the beam traversed small relative to the depth that the beam penetrates the work. All of the foregoing steps are preferably performed in a vacuum.
Abstract:
Joining tool (10) for inductively heating an, at least in some portions, inductively heatable joining member (18), wherein the joining tool (10) has a joining head (12) having a holding device (28) for holding the joining member (18). The joining tool (10) further has an inductive heating device (36), wherein an electric coil (40) of the inductive heating device (36) is arranged such that a joining member (18) held in the holding device (28) can be inductively heated. The inductive heating device (36) here has a heat exchanger tube (50).
Abstract:
The invention relates to a method of manufacturing a heat exchanger, joined by brazing in a controlled atmosphere brazing process, comprising the steps of: (a)providing of the components to be brazed together of which at least one is made from an aluminium alloy brazing sheet product comprising of a core alloy clad on one or both sides with a Al-Si alloy brazingfiller material, the Al- Si alloy brazing filler material has been pre-treated by means of etching with an alkaline or acidic etchant, and wherein the Al-Si alloy brazing filler material has the following composition, consisting of, in wt.%: Si 5% to 15%, Mg 0.10% to 3%, Fe up to 0.8%, Cu up to 0.3%, Mn up to 0.8%, Zn up to 0.25%, Ti up to 0.3%, balance aluminium, (b)assembling the components into an assembly, (c)brazing the assembly without applying brazing flux onto the assembly components, and brazing the whole assembly in a dry inert gas atmosphere at a brazing temperature, and wherein the oxygen content of the dry inert gas atmosphere is less than 35 ppm, and cooling of the brazed assembly.
Abstract:
본 발명은 원통 형상의 동체로 된 쉘과, 상기 쉘의 내부를 구획하도록 설치되고, 서로 마주보도록 복수의 튜브삽입홀이 각각 관통 형성된 한 쌍의 튜브시트와, 상기 튜브시트 사이를 연결하도록 서로 마주보는 상기 튜브삽입홀 각각에 용접 결합되는 복수의 튜브를 포함하는 쉘앤튜브 열교환기에 있어서, 상기 튜브와 동일한 직경으로 형성되고, 상기 튜브시트 각각의 튜브삽입홀 내부로 각각 삽입되는 원통 형상으로 된 복수의 튜브접합부재와, 장형의 용접와이어를 일정한 길이로 절단한 후 링형상으로 제작되고, 상기 튜브 각각의 양단 외주에 각각 삽입되는 복수의 링와이어를 더 포함하고, 상기 튜브시트 각각은, 서로 마주보는 면에 상기 튜브삽입홀로부터 외주방향을 향해 접합부가 형성되도록 소정의 거리만큼 이격된 환형의 튜브시트홈이 함몰 형성되고, 상기 튜브 각각은, 양단이 상기 튜브접합부재의 마주보는 각각의 일단에 접촉함과 동시에 상기 튜브시트홈의 함몰된 간격 범위 내에 각각 위치하도록 상기 튜브시트의 마주보는 각각의 튜브삽입홀에 삽입되고, 상기 튜브접합부재의 내부로 삽입된 용접토치를 이용하여 상기 튜브시트 각각에 상기 링와이어를 용가재로 하여 상기 튜브접합부재와 용접결합되는 것을 특징으로 하는 쉘앤튜브 열교환기이다.