Refrigeration cycle device
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Solution Overview
Problem
Existing refrigeration cycle devices for air conditioners face challenges in continuously adjusting ventilation air temperature over a wide range while maintaining operation efficiency.
Innovation Solution
The refrigeration cycle device incorporates a compressor, branch portion, heating portion, depressurization device, outdoor and indoor heat exchange portions, bypass passage, bypass flow rate adjustment, merging portion, and a refrigerant circuit switching portion to manage refrigerant flow and adjust temperature effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the refrigerant circuit is switched according to operation mode to continuously adjust ventilation air temperature, then the temperature adjustment range is improved, but the operation efficiency decreases
Solution Approach 1:
The bypass flow rate adjustment portion dynamically adjusts the refrigerant flow rate through the bypass passage based on operation conditions, enabling continuous temperature adjustment while optimizing energy efficiency. The merging portion dynamically combines refrigerant flows from different paths to maintain efficient operation across varying temperature requirements.
Solution Approach 2:
The heating portion serves multiple functions: it heats ventilation air in heating modes and acts as a heat exchanger in cooling modes. The system can operate in multiple modes (hot gas dehumidification heating, series dehumidification heating, cooling) using the same basic refrigerant circuit components, improving overall system efficiency.
2Temperature
If the heating portion heats ventilation air cooled at the indoor evaporation portion, then the heating capability is improved, but the system complexity increases
Solution Approach 1:
The merging portion combines refrigerant flows from the heating portion and bypass passage into a single stream before returning to the compressor. This integration simplifies the overall system architecture while enabling complex heating and cooling functions through coordinated operation of the various components.
3Adaptability or versatility
If the bypass passage guides refrigerant toward the compressor suction port, then the refrigerant flow control flexibility is improved, but the pressure management complexity increases
Solution Approach 1:
The bypass passage acts as an intermediary path that allows refrigerant to bypass certain components and flow directly toward the compressor suction port. The bypass flow rate adjustment portion serves as a mediator to control the refrigerant flow rate through this bypass path, enabling flexible pressure and flow management without requiring complex additional control mechanisms.
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 allows for continuous adjustment of ventilation air temperature in a wide range, enhancing heating capability while suppressing a decrease in operation efficiency by optimizing refrigerant flow and pressure management.
Implementation Method 1
a compressor (11), configured to compress and discharge a refrigerant
Implementation Method 2
a heating portion (42), configured to heat ventilation air blowing a space to be air conditioned, using, as a heat source, the refrigerant
Implementation Method 3
an outdoor heat exchange portion (15), configured to exchange heat between the refrigerant flowing out of the depressurization device and outside air
Implementation Method 4
an indoor evaporation portion (18), configured to evaporate the refrigerant depressurized at the heating-portion side depressurization portion to cool the ventilation air
Implementation Method 5
a depressurization device, configured to depressurize the refrigerant flowing out of the heating portion
Data Source
AI summary
In a series dehumidification heating mode, a refrigerant discharged from a compressor circulates in order of a heating portion, a first depressurization unit, an outdoor heat exchange portion, a second depressurization unit, an indoor evaporation portion, and a suction port of the compressor. In a hot gas dehumidification heating mode, (i) the refrigerant discharged from the compressor circulates in order of a branch portion, the heating portion, the second depressurization unit, the indoor evaporation portion, a merging portion, and the suction port of the compressor; (ii) the refrigerant discharged from the compressor circulates in order of the branch portion, the heating portion, a third depressurization unit, the merging portion, and the suction port of the compressor; and (iii) the refrigerant discharged from the compressor circulates in order of the branch portion, a bypass passage, the merging portion, and the suction port of the compressor.