Copper Pipe Connection Mechanism Without Heat
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Solution Overview
Problem
Conventional refrigerant pipe connection mechanisms for large-sized air conditioners require heat and specialized techniques, making them impractical for rapid construction or repair situations, especially at night or in short construction periods.
Innovation Solution
A connection mechanism for copper pipes and joints that uses a projection with inclined surfaces on the copper pipe, a joint with a nut engagement cylindrical portion, and a nut with an inclined pressing portion, allowing for secure connection without heat, using a screwing mechanism that maintains coaxial straightness and sealing, eliminating the need for packing members and accommodating temperature changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If brazing is used to connect copper pipes, then strong connection strength is achieved, but heat and specialized techniques are required making it impractical for rapid construction or repair
Solution Approach 1:
The patent replaces the thermal brazing process with a purely mechanical connection system. A nut with an inclined pressing portion mechanically engages with a projection on the copper pipe, creating a secure connection through mechanical interlocking and friction rather than thermal bonding. This eliminates the need for heat sources and specialized brazing techniques while maintaining connection strength.
Solution Approach 2:
The invention changes the connection mechanism from thermal (brazing temperature) to mechanical (tightening torque and pressing force). By transforming the connection parameter from temperature-dependent to force-dependent, the system enables rapid assembly and disassembly without heat, directly resolving the contradiction between connection strength and ease of operation.
2Reliability
If brazing is used for copper pipe connection, then reliable sealing is achieved, but construction time is extended due to night-and-day work requirements
Solution Approach 1:
The mechanical pressing connection replaces thermal brazing, enabling rapid assembly during daytime without the time-consuming heat application and cooling processes. The inclined pressing portion of the nut mechanically seals the connection through direct contact with the projection, achieving reliable sealing without extending construction time.
3Strength
If conventional connection methods are used, then connection strength is maintained, but the process requires heat and specialized techniques that complicate the construction process
Solution Approach 1:
The patent eliminates the complex thermal process of brazing by implementing a simple mechanical connection using a nut and projection. This mechanical system requires no special equipment, heat sources, or specialized techniques, thereby reducing device complexity while maintaining connection strength through mechanical engagement and friction.
4Strength
If brazing is used to connect pipes, then strong bonding is achieved, but safety risks increase due to use of flammable gas or electric heaters
Solution Approach 1:
The mechanical connection system completely eliminates the use of flammable gases and electric heaters required for brazing. The nut with inclined pressing portion creates bonding strength through mechanical friction and interlocking, removing all fire and electrical safety hazards associated with thermal connection methods.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The mechanism provides a strong, leak-proof, and durable connection that maintains coaxial straightness under stress and temperature changes, simplifying the connection process and eliminating the need for packing members, while allowing for efficient assembly without heat or specialized techniques.
Implementation Method 1
the inclined pressing portion being externally fitted on the copper pipe to press the other inclined surface of the projection
Implementation Method 2
the two inclined surfaces of the projection are sandwiched and fixed between the inclined pressing portion of the nut and the corner portion of the joint
Implementation Method 3
a nut including a nut body, the nut body including an inclined pressing portion and an opening in which a female screw screwed with the male screw of the nut engagement cylindrical portion is formed
Implementation Method 4
The copper pipe and the joint are connected to each other by screwing the male screw of the nut engagement portion of the joint in the female screw of the nut body of the nut
Data Source
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AI summary
To attain a connection mechanism that is for a copper pipe and a joint and that enables easy connection only by nut fastening without requiring heat, unlike soldering work, and enables laying a copper pipe without a special laying technique. Provided is a connection mechanism between a copper pipe and a joint for connecting the copper and the joint by means of a nut. The joint has a corner part formed, at a boundary with an inner diameter part, by forming a large diameter part from the inner peripheral surface open side of the nut engaging cylindrical part of the nut, the inner diameter part abutting on one inclined surface of a projecting part having two inclined surfaces and formed in the copper pipe, and is provided with a fitting cylindrical part in the center of the joint so as to be adjacent to the nut engaging cylindrical part. The nut has an extension cylindrical part extending from a nut body to fit around the copper pipe, and also has a reinforcing cylindrical part extending in a direction opposite to the extending cylindrical part of the bot body to fit around the fitting cylindrical part of the joint.