Vehicular Heat Management Switching Device
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Solution Overview
Problem
Existing vehicular heat management systems face challenges in preventing refrigerant leakage into the vehicle interior and release to the atmosphere, particularly during collisions, and struggle to maintain optimal coolant temperatures to prevent frost formation and excessive temperature reduction.
Innovation Solution
A vehicular heat management system with a switching device that controls the communication between two heat medium circuits, allowing for temperature regulation and introducing heat from a high-pressure side heat exchanger into a heat-absorption heat exchanger to melt frost, thereby preventing refrigerant release and maintaining adequate coolant temperatures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the interior condenser is used for heat exchange between high-pressure refrigerant and blast air, then air heating is achieved, but refrigerant may leak into the vehicle interior
Solution Approach 1:
The patent divides the heat exchanger into two separate units: an interior condenser for high-pressure refrigerant heat exchange and an exterior evaporator for low-pressure refrigerant heat exchange with outside air. This segmentation isolates the high-pressure refrigerant system from the vehicle interior air flow path, preventing refrigerant leakage into the cabin while maintaining heat pump functionality.
2Ease of operation
If the exterior heat exchanger is disposed at the foremost portion of the vehicle to intake outside air, then heat exchange with outside air is enabled, but the heat exchanger may be destroyed in light collisions
Solution Approach 1:
The patent separates the exterior evaporator (low-pressure side) from the interior condenser (high-pressure side) and positions them at different locations. The exterior evaporator can be placed in the front for optimal air intake, while the interior condenser is positioned away from collision-prone areas. This segmentation allows the system to maintain outside air intake capability while protecting critical high-pressure components.
Solution Approach 2:
The patent implements protective measures by designing the system architecture such that the high-pressure interior condenser is isolated from collision damage zones. The separation of functions allows the exterior evaporator to absorb collision impacts while the interior condenser remains protected, providing beforehand cushioning against potential damage to critical components.
3Temperature
If the low-pressure side heat exchanger cools the heat medium to low temperature, then heat absorption capability is improved, but excessive temperature reduction occurs
Solution Approach 1:
The patent introduces a switching device that acts as an intermediary between the low-pressure and high-pressure heat medium circuits. When the heat medium temperature in the first circuit drops below a predetermined threshold, the switching device activates to couple the circuits, allowing warmer heat medium from the second circuit to mix with and raise the temperature of the cooler heat medium in the first circuit, thereby preventing excessive temperature reduction.
Solution Approach 2:
The patent implements a feedback control mechanism where a temperature detection device continuously monitors the heat medium temperature in the first heat medium circuit. When the temperature falls below a predetermined value, the switching device is activated to couple the first and second circuits, and when the temperature rises above a predetermined value, the switching device disconnects the circuits. This feedback loop maintains the heat medium temperature within an optimal range.
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 system effectively prevents refrigerant leakage and ensures reliable heat supply for frost removal, maintaining coolant temperatures and preventing excessive reduction, thus enhancing safety and efficiency.
Implementation Method 1
a low-pressure side heat exchanger configured to cool a heat medium by heat exchange between a low-pressure side refrigerant of a refrigeration cycle and the heat medium
Implementation Method 2
a high-pressure side heat exchanger configured to heat a heat medium by heat exchange between the high-pressure side refrigerant of the refrigeration cycle and the heat medium
Implementation Method 3
a switching device configured to switch a mode between a communicating mode in which the first heat medium circuit and the second heat medium circuit are coupled and a non-communicating mode in which the first heat medium circuit and the second heat medium circuit are not coupled
Data Source
AI summary
A vehicular heat management system includes: a refrigerant circuit; a first heat medium circuit in which a heat medium circulates and exchanges heat with a low-pressure side refrigerant of the refrigerant circuit; a second heat medium circuit in which a heat medium circulates and exchanges heat with a high-pressure side refrigerant of the refrigerant circuit; and a switching device configured to switch a mode between a communicating mode in which the first heat medium circuit and the second heat medium circuit are coupled and a non-communicating mode in which the first heat medium circuit and the second heat medium circuit are not coupled on the basis of a temperature of the heat medium in the first heat medium circuit.