Ventilation device and integrated air conditioning system having the same
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Solution Overview
Problem
Existing ventilation devices struggle to maintain indoor temperature and humidity in a fresh state due to incomplete dehumidification of outdoor air and limited control over temperature and humidity levels.
Innovation Solution
An integrated air conditioning system with a ventilation device that includes multiple heat exchangers and expansion devices to adjust temperature and humidity, using a controller to operate in different dehumidification modes based on indoor sensors, and a refrigerant circulation system to condition air before discharge into the indoor space.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If total heat exchange is performed between outdoor air and indoor air through a total heat exchanger, then energy efficiency is improved, but dehumidification of outdoor air is incomplete and indoor temperature and humidity cannot be maintained in a fresh state
Solution Approach 1:
The single total heat exchanger is segmented into multiple heat exchangers with different functions: a first heat exchanger for total heat exchange to improve energy efficiency, and a second heat exchanger specifically for dehumidification to improve dehumidification performance. This segmentation allows each component to optimize its specific function rather than one component trying to do everything.
Solution Approach 2:
The patent merges the total heat exchange function and the dehumidification function into a single integrated air conditioning system that includes both a ventilation device and an air conditioner. This merging allows the system to achieve both energy efficiency through heat recovery and effective dehumidification through coordinated operation of multiple heat exchangers.
2Device complexity
If a single heat exchanger is used for both heat exchange and dehumidification, then device complexity is reduced, but control over temperature and humidity levels is limited
Solution Approach 1:
The system dynamically controls the operation of multiple heat exchangers based on real-time indoor temperature and humidity conditions. The controller activates or deactivates the first and second heat exchangers depending on whether dehumidification is needed, allowing flexible adaptation to different environmental conditions while maintaining a relatively simple overall system structure.
Solution Approach 2:
The system changes operational parameters by selectively controlling the refrigerant flow to different heat exchangers. By adjusting which heat exchangers are active and how the refrigerant circulates, the system can adapt its temperature and humidity control performance to match varying indoor conditions without requiring a completely different system architecture.
3Manufacturing precision
If multiple heat exchangers and expansion devices are added to achieve effective dehumidification, then dehumidification performance is improved, but device complexity increases
Solution Approach 1:
The multiple heat exchangers serve multiple functions: the first heat exchanger performs total heat exchange for energy recovery, while the second heat exchanger provides dehumidification. Both heat exchangers can operate in different modes depending on system requirements, making the overall system more versatile while justifying the increased component count through functional diversity.
Solution Approach 2:
The system uses its own indoor air as a heat source for the first heat exchanger, allowing it to pre-condition outdoor air before it enters the dehumidification stage. This self-service approach improves energy efficiency and reduces the burden on the second heat exchanger, optimizing the performance of the multi-component system without requiring external assistance.
4Device complexity
If outdoor air is supplied directly to indoor space without dehumidification, then device complexity is minimized, but indoor humidity cannot be maintained at optimal levels
Solution Approach 1:
The system performs preliminary dehumidification of outdoor air before it is supplied to the indoor space. The second heat exchanger removes excess moisture from outdoor air in advance, ensuring that the air entering the indoor environment is already at optimal humidity levels, thereby maintaining reliable indoor air quality without requiring complex post-conditioning systems.
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 maintains indoor air at optimal temperature and humidity levels by dehumidifying and conditioning outdoor air before introduction, minimizing the need for separate dehumidifiers and reducing production costs through integration with a standard outdoor unit.
Implementation Method 1
a total heat exchanger in which air flowing through the inlet flow path and air flowing through the outlet flow path exchange heat with each other
Implementation Method 2
the first heat exchanger and the second heat exchanger may be configured to cool and dehumidify the air, which passes through the first heat exchanger and the second heat exchanger, by evaporating the refrigerant
Implementation Method 3
the first heat exchanger may be configured to heat the air passing through the first heat exchanger by condensing the refrigerant
Data Source
AI summary
An integrated air conditioning system includes an outdoor unit, an indoor unit, and a ventilation device. The ventilation device includes a housing including an inlet flow path, and an outlet flow path, a total heat exchanger in which air flowing through the inlet flow path and air flowing through the outlet flow path exchange heat with each other, a first heat exchanger disposed on the inlet flow path to receive a refrigerant from the outdoor unit, a second heat exchanger disposed upstream of the first heat exchanger on the inlet flow path and connected to the first heat exchanger to be supplied with refrigerant discharged from the first heat exchanger, a first expansion device to expand the refrigerant supplied to the first heat exchanger from the outdoor unit, and a second expansion device to expand the refrigerant discharged from the first heat exchanger and supplied to the second heat exchanger.