Airconditioning apparatus
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Solution Overview
Problem
Conventional air conditioning systems fail to sufficiently raise the temperature of hot air blown to users when entering a cold environment, despite maximizing compressor operation frequency and reducing indoor fan revolutions.
Innovation Solution
The system adjusts airflow volume by reducing or stopping the second use side fan's operation and increasing the compressor's revolutions when a high-temperature air request is made, while maintaining airflow in the first use side fan to concentrate heat on the first use side heat exchanger.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the compressor operation frequency is maximized and indoor fan revolutions are reduced, then the temperature of hot air should be raised, but the temperature of hot air blown to the user is not sufficiently raised
Solution Approach 1:
The patent divides the indoor units into two groups: first indoor units that are stopped during high-temperature air blowing mode, and second indoor units that continue normal operation. This segmentation allows heat resources to be concentrated on specific units receiving high-temperature air requests, resolving the contradiction by selectively applying different operational modes to different segments of the system.
Solution Approach 2:
The patent creates a composite operational mode that combines elements of both full operation and stopped operation. By selectively stopping certain indoor units while maintaining others, the system forms a composite state that optimizes both temperature concentration and overall heating effectiveness, resolving the technical contradiction.
2Loss of energy
If the airflow volume of the second use side fan is reduced or made zero, then heat consumption in the second use side heat exchanger is reduced, but the overall system efficiency may be affected
Solution Approach 1:
The patent extracts the high-temperature air blowing function from the overall system by selectively stopping most indoor units and dedicating resources to a single unit (or limited units) that receives the high-temperature air request. This extraction allows the system to concentrate heat resources where they are most needed, reducing wasted heat consumption in units that don't require high-temperature air.
Solution Approach 2:
The patent applies partial action by stopping only the necessary indoor units (first indoor units) while maintaining operation of units that don't require high-temperature air (second indoor units). This partial stopping approach reduces heat consumption in non-essential units while preserving overall heating capacity through the continued operation of essential units.
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 raises the temperature of hot air blown out, maintaining comfort and efficiency by concentrating heat and reducing heat consumption in non-essential units.
Implementation Method 1
a compressor configured to compress the refrigerant whose heat is exchanged in the heat source side heat exchanger and discharge the compressed refrigerant
Implementation Method 2
a first use side heat exchanger... a second use side heat exchanger... a heat source side heat exchanger configured to perform heat exchange of a refrigerant
Data Source
AI summary
Provided is an air conditioning apparatus that sufficiently raises the temperature of hot air to be blown out when receiving a request for high-temperature air temporarily raising the temperature of the hot air. A first use side unit includes a first use side heat exchanger and a first use side fan. A second use side unit includes a second use side heat exchanger and a second use side fan. When the first use side unit receives a request for the high-temperature air and the second use side unit receives no request for the high-temperature air, the air conditioning apparatus shifts to a mode that performs control to reduce the airflow volume of the second use side fan or make the airflow volume of the second use side fan zero such as reducing the number of revolutions of the second use side fan in another room by 40 rpm.