Swivel Machine Cooling Duct at Inspection Door Air Exit
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Solution Overview
Problem
The existing swivel working machines have inefficiencies in cooling air exhaust performance and cooling efficiency due to accumulated cooling air within the exterior cover, which affects the overall cooling performance.
Innovation Solution
The design includes a swivel working machine with an inspection door, a cooler, and a shroud that guides cooling air generated by fans to an air exit portion, utilizing an elastic body for sealing and a duct defined by the shroud and inspection door contact to enhance air exhaust, and a controller to manage fan operation based on battery and fluid temperatures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the shroud surrounds the fan and guides cooling air, then cooling air guidance is improved, but cooling air exhaust performance deteriorates due to accumulation inside the exterior cover
Solution Approach 1:
The duct acts as an intermediary component between the shroud and the exterior cover, providing a dedicated passage for cooling air to travel from the fan area to the discharge location. This mediator structure ensures that the cooling air guided by the shroud is efficiently transported outward without accumulating in the interior space.
Solution Approach 2:
The cooling air flow path is segmented into distinct zones: the shroud creates a guided flow zone, the duct provides a transport zone, and the exterior cover with its opening serves as a discharge zone. This segmentation prevents mixing of guided cooling air with accumulated air, maintaining exhaust performance.
2Reliability
If the inspection door is closed to seal the interior, then sealing is improved, but cooling air discharge is hindered
Solution Approach 1:
The inspection door is designed with differentiated local qualities: most of the door provides sealing when closed, while a specific local region (the opening portion) remains open to allow cooling air discharge. This local quality differentiation resolves the contradiction between overall sealing and localized discharge requirements.
3Device complexity
If the shroud opening edge contacts the inspection door to define a duct, then duct formation is improved, but sealing at the contact area deteriorates
Solution Approach 1:
The elastic body in the groove of the inspection door acts as a flexible sealing element that deforms to seal the contact area between the shroud opening edge and the door. This flexible component maintains both the duct formation geometry and the sealing integrity at the contact interface.
4Power
If fans discharge cooling air toward the air exit portion, then cooling air generation is improved, but cooling efficiency deteriorates due to air accumulation
Solution Approach 1:
The combination of shroud guidance, duct transport, and open inspection door discharge creates a continuous flow path for cooling air from generation to exhaust. This continuity prevents accumulation and maintains constant cooling efficiency, ensuring the useful action of cooling persists without interruption or energy loss.
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
This configuration improves cooling air exhaust performance and cooling efficiency by ensuring effective discharge of cooling air and optimized fan operation, enhancing the machine's thermal management.
Implementation Method 1
a cooler including a fan to discharge cooling air sucked from an interior of a machine body toward the air exit portion
Implementation Method 2
a heat exchanger to cool a to-be-cooled target using cooling air sucked by the fan
Implementation Method 3
an elastic body provided at the portion that surrounds the air exit portion. When the inspection door is in the closed state, the elastic body may be elastically deformed upon contact with the opening edge portion of the shroud to seal a contact area
Data Source
AI summary
A swivel working machine includes an exterior cover to define a space where device(s) is/are provided on a swivel base, an inspection door openably and closably provided in the exterior cover and including an air exit portion, a fan to discharge cooling air sucked from an interior of a machine body toward the air exit portion, a heat exchanger to cool a to-be-cooled target using cooling air sucked by the fan, and a shroud to surround the fan and guide cooling air generated by the fan. When the inspection door in a closed state, a duct to guide cooling air generated by the fan to the air exit portion is defined by an opening edge portion of the shroud making contact with a portion of the inspection door that surrounds the air exit portion.