Suction Tube Alignment Features for HVAC Assembly Precision

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Solution Overview

Problem

Existing HVAC systems face challenges with misalignment issues during assembly due to multiple brazed connections in suction tubes, leading to increased time and costs associated with manual adjustments and labor.

Innovation Solution

Incorporating alignment features on tube segments of suction tubes to facilitate proper alignment before mechanical securement, reducing the likelihood of misalignment and streamlining the assembly process.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If multiple brazed connections are used in suction tubes, then the suction tube can be assembled from multiple segments, but misalignment issues occur during assembly requiring manual adjustments

Engineering Contradiction:
Improveability to assemble from multiple segmentsVSAvoidalignment accuracy
Core Design Contradiction:
Ease of manufactureVSManufacturing precision

Solution Approach 1:

Alignment features (such as alignment pins, keys, or marked indicators) are incorporated into the tube segments before assembly. These features pre-establish the correct relative positioning and orientation of segments, ensuring that when the segments are brought together for brazing, they automatically align in the proper configuration without requiring manual adjustment during the assembly process.

Inventive Principle:
Principle #10Preliminary action

Solution Approach 2:

Alignment features act as intermediary elements between the tube segments. These features serve as mediators that guide the relative positioning and orientation of the segments during assembly, ensuring accurate alignment is achieved before the brazing operation occurs.

Inventive Principle:
Principle #24Intermediary (Mediator)

2Manufacturing precision

If manual adjustments are made to correct misalignment, then alignment can be achieved, but assembly time and labor costs increase

Engineering Contradiction:
Improvealignment accuracyVSAvoidassembly time
Core Design Contradiction:
Manufacturing precisionVSLoss of time

Solution Approach 1:

Alignment features are built into the tube segments during manufacturing, performing the alignment function in advance. This eliminates the need for time-consuming manual adjustments during assembly, as the features automatically guide the segments into correct alignment when joined.

Inventive Principle:
Principle #10Preliminary action

Solution Approach 2:

The alignment features enable the tube segments to self-align during assembly. The segments automatically find their correct relative positioning through the alignment features without requiring external manual intervention, thereby reducing assembly time and labor requirements.

Inventive Principle:
Principle #25Self-service

3Manufacturing precision

If alignment features are added to tube segments, then alignment accuracy improves, but device complexity increases

Engineering Contradiction:
Improvealignment accuracyVSAvoidstructural complexity
Core Design Contradiction:
Manufacturing precisionVSDevice complexity

Solution Approach 1:

Alignment features are added only at specific localized positions on the tube segments where alignment is required, rather than modifying the entire structure. This approach improves alignment accuracy while minimizing the increase in overall device complexity, as the features are confined to small, discrete locations on the segments.

Inventive Principle:
Principle #3Local quality

Data Source

PatentUS20240271838A1Tube joint for HVAC system
Publication Date: 2024.08.15 JOHNSON CONTROLS LIGHT COMMERCIAL IP GMBH
  • US20240271838A1 patent drawing
  • US20240271838A1 patent drawing
  • US20240271838A1 patent drawing

AI summary

A suction tube for a heat exchanger system includes a first tube segment and a second tube segment. The first tube segment includes a first end and a second end, wherein the first end is configured to fluidly couple to a heat exchanger of the heat exchanger system, and wherein the second end comprises a first alignment feature. The second tube segment includes an additional first end and an additional second end, wherein the additional first end is configured to couple to the second end of the first tube segment, the additional second end is configured to extend through a tubing access panel, and the additional first end comprises a second alignment feature configured to align with the first alignment feature during assembly of the heat exchanger system to align the additional second end of the second tube segment with an opening of the tubing access panel.