Inward-Facing Belt Arrangement for Compact Fluid Machine Maintenance

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Solution Overview

Problem

Existing package type fluid machines require a larger installation area due to the arrangement of maintenance parts on the intake passage side, making it difficult to reduce the total size of the product.

Innovation Solution

The fluid machine units are arranged with the pulleys and belts facing inward, allowing maintenance parts to be accessed from the outside while minimizing the space needed for belt tension adjustment, and incorporating efficient ventilation to prevent cooling wind stagnation and improve cooling efficiency.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If the pulley and belt are arranged on the outward side of the fluid machine unit, then the rotating objects are easily accessible, but the maintenance parts (suction filter) must be arranged inside the intake passage side, requiring larger maintenance space and installation area

Engineering Contradiction:
ImproveAccessibility of rotating objectsVSAvoidInstallation area
Core Design Contradiction:
Ease of operationVSArea of stationary object

Solution Approach 1:

The patent inverts the conventional arrangement by placing the pulley and belt on the intake passage side (inside) rather than on the outward side. This inversion allows maintenance parts like the suction filter to be arranged on the outward side, making them easily accessible without requiring large maintenance spaces. The driving source is positioned on the outward side while the belt transmission components are moved to the intake passage side, resolving the spatial conflict between accessibility and compactness.

Inventive Principle:
Principle #13The other way round (Inversion)

2Reliability

If maintenance parts are arranged on the intake passage side, then safety is improved by separating rotating objects from maintenance areas, but maintenance space and installation area increase

Engineering Contradiction:
ImproveSafety separation of rotating objects and maintenance partsVSAvoidInstallation area
Core Design Contradiction:
ReliabilityVSArea of stationary object

Solution Approach 1:

The patent inverts the conventional spatial arrangement by placing maintenance parts (suction filter) on the outward side and rotating objects (pulley, belt) on the intake passage side. This inversion achieves both safety separation and compact design: maintenance parts are easily accessible from the outward side while rotating objects are contained within the intake passage area, minimizing the required installation area.

Inventive Principle:
Principle #13The other way round (Inversion)

3Reliability

If the fluid machine unit is designed with conventional arrangement, then safety is ensured by separating maintenance and rotating components, but the total product size cannot be reduced

Engineering Contradiction:
ImproveSafety of component separationVSAvoidTotal product size
Core Design Contradiction:
ReliabilityVSVolume of stationary object

Solution Approach 1:

The patent applies inversion by repositioning the pulley and belt to the intake passage side and the driving source to the outward side. This allows the fluid machine unit to maintain safe separation between maintenance parts and rotating components while significantly reducing the total product size. The compact arrangement enables closer positioning of multiple fluid machine units without compromising safety or accessibility.

Inventive Principle:
Principle #13The other way round (Inversion)

Data Source

PatentUS10227981B2Package type fluid machine
Publication Date: 2019.03.12 HITACHI IND EQUIP SYST CO LTD
  • US10227981B2 patent drawing
  • US10227981B2 patent drawing
  • US10227981B2 patent drawing

AI summary

A package type fluid machine having a plurality of fluid machine units each of which includes a fluid machine, a motor that drives the fluid machine, and a belt that connects the fluid machine and the motor. The plurality of fluid machine units are arranged in a cabinet, wherein the plurality of fluid machine units has a pair of the fluid machine units, arranged opposed to each other, with the belts of the fluid machine units facing inward.