Inverter Cooling Device Segmentation for Switch Cabinet
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Solution Overview
Problem
Existing cooling devices for control cabinet air conditioning struggle to protect the electronic components of the inverter from moisture while maintaining efficient heat dissipation, as the inverter's waste heat can negatively impact the cooling efficiency if located in the inner circuit and is sensitive to moisture when placed in the external circuit.
Innovation Solution
The cooling device is designed with the heat exchanger on one side of the inverter in the outer circuit and the electronic components on the opposite side in the inner circuit, utilizing a separating element with a flange for fluid-tight connection and an air guiding element to direct airflow effectively, preventing moisture ingress and ensuring efficient heat exchange.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the inverter is arranged in the inner circuit, then the electronic part is protected from moisture, but the waste heat from the inverter acts on the air inside the control cabinet and reduces cooling efficiency
Solution Approach 1:
The inverter is divided into two functionally separate sides: the heat exchanger side arranged in the outer circuit for heat dissipation, and the electronic part side arranged in the inner circuit for protection from moisture. The separating element creates a fluidic barrier between these two sides, allowing each to operate in its optimal environment without compromising the other.
2Loss of energy
If the inverter is arranged in the outer circuit, then waste heat is dissipated effectively, but the electronic part is exposed to moisture and requires encapsulation
Solution Approach 1:
The inverter is segmented into two distinct spatial zones within the same component housing: the heat exchanger operates in the outer circuit environment for effective heat dissipation, while the electronic part operates in the inner circuit environment protected from moisture. The separating element with integrated flange creates the fluidic barrier enabling this segmentation.
3Reliability
If the electronic part is encapsulated to protect from moisture, then protection is achieved, but device complexity increases
Solution Approach 1:
The protective function previously requiring separate encapsulation is merged into the separating element itself. The flange of the separating element creates a fluid-tight connection that inherently protects the electronic part from moisture while maintaining simplicity of structure and eliminating the need for additional encapsulation components.
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 effectively protects the electronic components from moisture and maintains efficient heat dissipation, preventing condensation and ensuring optimal cooling performance without impairing the device's efficiency.
Implementation Method 1
a heat exchanger on a first of two opposite sides for exchanging waste heat with the air surrounding the heat exchanger
Implementation Method 2
an inner circuit through which air to be cooled from a control cabinet interior is guided by means of a first fan
Implementation Method 3
an outer circuit that is fluidically separated from the inner circuit and through which ambient air is guided by means of a second fan
Implementation Method 4
The heated air from the interior of the switch cabinet passes through an air-refrigerant heat exchanger in the inner circuit and is returned to the interior of the switch cabinet as cooled air
Data Source
Figure 1
Figure 2
AI summary
The invention relates to a cooling device (1) for switch cabinet air-conditioning, which has an inner circuit (2), through which air (103) to be cooled from a switch cabinet interior (101) is led by means of a first fan (4), and an outer circuit (3) which is isolated fluidically from the inner circuit (2) and through which ambient air (104) is led by means of a second fan (5), the inner circuit (2) and the outer circuit (3) being separated from each other fluidically via a separating element (6), and having an inverter (7), via which a compressor (19) of the cooling device (1) is driven, on a first (8) of two mutually opposite sides (8, 9) of a heat exchanger (10) for exchanging waste heat to the air surrounding the heat exchanger (10) and, on the second of the two mutually opposite sides (8, 9), having an electronic part (11) having a multiplicity of electronic components (12), characterized in that at least the heat exchanger (10) of the first side (8) of the inverter (7) is arranged in the outer circuit (3), and at least the electronic part (11) of the second part (9) of the inverter (7) is arranged in the inner circuit (2).