Heat Exchanger Layout With Selective Indoor Air Recirculation
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Solution Overview
Problem
Existing heat exchange devices cannot provide indoor air circulation while maintaining heat exchange efficiency, as they are designed with only outdoor fresh air and indoor exhaust passages, leading to decreased efficiency when attempting to incorporate indoor air circulation by reducing the heat exchange core size.
Innovation Solution
A heat exchange device with separate air-supply and exhaust paths that communicate through a heat exchange unit, featuring a circulation air port on the extension wall to enable selective internal air circulation without altering the device's size, allowing air to flow from the exhaust inlet to the air-supply outlet through the circulation air port, thus achieving indoor air circulation while maintaining heat exchange efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the heat exchange core volume is reduced to make room for an indoor circulation air port, then indoor air circulation capability is improved, but heat exchange efficiency deteriorates
Solution Approach 1:
The device is divided into functionally independent air paths: a fresh air passage for outdoor air intake, an exhaust passage for indoor air discharge, and a circulation air passage for indoor air recirculation. Each passage has dedicated inlet and outlet ports, allowing simultaneous operation of heat exchange and indoor circulation without interfering with each other's performance
Solution Approach 2:
The heat exchange core serves multiple functions simultaneously: it enables heat exchange between fresh air and exhaust air, and also facilitates heat exchange between circulation air and exhaust air. The circulation air port is integrated into the existing heat exchange core structure, allowing the core to handle both traditional ventilation and indoor circulation functions
2Device complexity
If the heat exchange core volume is reduced to accommodate circulation air port, then device structure flexibility is improved, but heat exchange performance deteriorates
Solution Approach 1:
The circulation air port is nested within the heat exchange core structure itself, specifically formed in the partition wall that constitutes the core. This integration allows the circulation function to be embedded without adding external components or increasing overall device volume, maintaining structural compactness while enabling new functionality
Solution Approach 2:
The circulation air port is formed in the partition wall dimension of the heat exchange core, utilizing the vertical or lateral space within the existing core structure rather than adding external volume. This dimensional utilization allows integration of circulation capability without compromising the core's heat exchange surface area
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
Enables internal air circulation without reducing heat exchange efficiency, ensuring effective air exchange and circulation within the device without increasing its size or complexity.
Implementation Method 1
the air-supply air path and the exhaust air path exchange heat when passing through the heat exchange unit
Data Source
AI summary
The present application provides a heat exchange device. The heat exchange device includes: a case, an interior of which is formed into an air-supply inflow space, an exhaust inflow space, an air-supply outflow space and an exhaust outflow space separated from each other, wherein a first extension wall is provided between the air-supply inflow space and the exhaust outflow space; and a heat exchange unit disposed in the case, and the air-supply inflow space and the air-supply outflow space communicate with each other by the heat exchange unit to form an air-supply air path, and the exhaust inflow space and the exhaust outflow space communicate with each other by the heat exchange unit to form an exhaust air path, wherein the air-supply air path and the exhaust air path exchange heat when passing through the heat exchange unit; the first extension wall is provided with a circulation air port communicating the air-supply inflow space and the exhaust outflow space, wherein the circulation air port may be selectively opened and closed. The heat exchange device may not only provide indoor air circulation but also ensure heat exchange efficiency.