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Brazing joints

a technology of brazing joints and joints, applied in the field of brazing joints, can solve the problems of increasing the price of copper metal, not only being continually confronted with brazing problems in general, but also being confronted with problems in particular

Inactive Publication Date: 2012-08-23
ADVANCED DISTRIBUTOR PRODS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0003]One aspect provides a refrigerant coil. In this embodiment, the refrigerant coil comprises a header tube that has an integrally formed coupling end. The coupling end has a first non-flared sect

Problems solved by technology

However, the price of copper metal has begun to experience a sharp increase in price due to growing world-wide demand.
As such, manufacturers have not only been continually confronted with brazing problems in general, but have also begun to be confronted with problems associated with brazing two different metals, such as aluminum and copper together.

Method used

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Examples

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Embodiment Construction

[0016]FIG. 1A illustrates one embodiment of a refrigeration tube 100 that may be used in a conventional refrigeration coil 103, as generally seen in FIG. 1B, including those employed in a refrigeration or condensing coil of a HVAC system. The refrigeration tube 100 is typically cut to a length 105, as may be required by design. In this particular embodiment, the refrigeration tube 100 may be a header tube to which other refrigeration tubes may be coupled at the points of openings 110 located along its length 105. The refrigeration tube 100 also includes an integrally formed coupling end 115 that may be located at one or both ends of the refrigeration tube 100. These integrally formed coupling ends 115 provide unique advantages over those of conventional design.

[0017]For example in conventional designs, a sweat coupling collar is typically used to join two different pieces of tubing, which typically have the same metallic composition, such as copper. In such applications, the collar ...

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Abstract

One aspect provides a header tube and a refrigeration tube that have ends on which one or more coupling ends are integrally formed thereon. Methods of fabricating the header tube and refrigeration tube are also provided.

Description

TECHNICAL FIELD[0001]This application is directed, in general, to a coupling end that can be used to braze joints in heating ventilation air conditioning (HVAC) systems.BACKGROUND[0002]Condensing or cooling coils are well known and have been used for decades in HVAC systems. Some coils are constructed of aluminum while other coils are constructed of copper. Typically, these coils are connected to the refrigerant delivery pipes that include brazed joints. As is well known, brazing is a metal-joining process whereby a filler metal is heated above and distributed between two or more close-fitting parts by capillary action. The filler metal is brought slightly above its melting (liquidus) temperature while protected by a suitable atmosphere, usually a flux. It then flows over the base metal (known as wetting) and is then cooled to join the work pieces together. However, the price of copper metal has begun to experience a sharp increase in price due to growing world-wide demand. As such,...

Claims

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Application Information

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IPC IPC(8): F28F9/02B21D53/06
CPCB21D39/04B21D53/06F28F9/0243Y10T29/49389F28F9/26F28D1/0475Y10T29/4935F28F9/182
Inventor JIN, DAE-HYUN
Owner ADVANCED DISTRIBUTOR PRODS