Vehicle Heat Unit Insulation for Compact Refrigerant Vibration Control
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Solution Overview
Problem
The reduction in size of refrigerant fluid circuits in electric and hybrid vehicles leads to increased vibratory transmission, as the longer ducts in prior systems acted as vibration dampers, and the securing of these circuits directly on the chassis results in increased vibrations transmitted to the vehicle's occupants.
Innovation Solution
A heat-producing unit with a thermal and acoustic insulation device that maintains the position of the refrigerant fluid circuit components, reduces heat exchanges with the exterior environment, and minimizes vibration propagation, while providing mechanical retention and fluidic connection to external installations through a fluid interface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the length of ducts in the refrigerant fluid circuit is reduced to decrease system size, then the volume and dimensions of the refrigerant fluid circuit are reduced, but the vibratory transmission increases because the long ducts in prior systems acted as vibration dampers
Solution Approach 1:
A vibration damper is introduced as an intermediary component between the refrigerant fluid circuit and the chassis to absorb and reduce vibratory transmissions. This mediator allows the ducts to be shortened for compactness while the vibration damper compensates for the loss of vibration damping that would otherwise be provided by the duct length.
Solution Approach 2:
The vibration damping function is extracted from the ducts themselves and transferred to a dedicated vibration damper component. This separation allows the ducts to be optimized for minimal length and volume while the vibration damper specifically addresses the vibratory transmission issue.
2Ease of manufacture
If the refrigerant fluid circuit is secured directly on the chassis to simplify installation, then the ease of installation is improved, but the vibrations are increased and transmitted to the chassis and occupants
Solution Approach 1:
A vibration damper is positioned between the refrigerant fluid circuit and the chassis to act as an intermediary that reduces vibratory transmissions. This allows direct mounting on the chassis for installation simplicity while the vibration damper prevents vibration transmission to the chassis and occupants.
3Object-affected harmful factors
If the ducts are lengthened to act as vibration dampers, then the vibratory transmission is reduced, but the size and dimensions of the refrigerant fluid circuit increase
Solution Approach 1:
The vibration damping function is extracted from the ducts and transferred to a dedicated vibration damper component. This allows the ducts to be kept short for minimal volume while the separate vibration damper provides the necessary vibration reduction.
Solution Approach 2:
The system is segmented into distinct functional components: the refrigerant fluid circuit for thermal management and a separate vibration damper for vibration control. This segmentation allows each component to be optimized independently for its specific function.
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 solution effectively reduces vibratory, thermal, and acoustic disturbances within the vehicle, maintaining the refrigerant fluid circuit's position and regulating the temperature of the heat-transfer fluid, thus enhancing the overall thermal management and occupant comfort.
Implementation Method 1
a thermal and acoustic insulation device which extends at least partly around the components of the refrigerant fluid circuit
Implementation Method 2
a thermal and acoustic insulation device which extends at least partly around the components of the refrigerant fluid circuit
Implementation Method 3
the long length of the ducts in the systems according to the prior art acts as a vibration damper
Implementation Method 4
at least one heat exchanger which is configured to exchange calories between the refrigerant fluid and the heat-transfer fluid
Data Source
AI summary
The invention relates to a heat-producing unit intended to be fitted to a motor vehicle, the heat-producing unit including at least a heat-transport fluid circuit and a refrigerant-fluid circuit and having a plurality of components selected from at least one refrigerant compression member, a refrigerant expansion member and at least one heat exchanger configured to exchange heat energy between the refrigerant fluid and the heat-transport fluid. The heat-producing unit includes at least one fluid interface intended to connect the heat-transport fluid circuit to an installation external to the heat-producing unit. The heat-producing unit includes a thermal and acoustic insulation device.