Air-conditioning apparatus having an indication apparatus
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Solution Overview
Problem
Existing split type air-conditioning apparatuses do not adequately account for installation height during refrigerant leakage safety assessments, leading to potential installation at suboptimal heights and compromised comfort and energy efficiency.
Innovation Solution
Incorporating an indication section on the indoor unit to clearly specify the required installation height and available floor area based on international standards, ensuring site workers install the apparatus at the correct height and in the appropriate space.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If refrigerant filling level is reduced to meet safety standards, then refrigerant leakage safety is improved, but cooling capacity and energy efficiency deteriorate
Solution Approach 1:
The system performs preliminary calculation of the maximum allowable refrigerant filling level based on room characteristics (floor area, installation height) before operation begins. This allows the control system to pre-determine the optimal refrigerant amount that satisfies both safety requirements and performance needs, avoiding the need to operate with unnecessarily reduced refrigerant charges.
Solution Approach 2:
The system dynamically adjusts the refrigerant filling level parameter based on calculated room characteristics. By changing the refrigerant charge amount to match the specific installation environment, the system optimizes the balance between safety (compliance with maximum allowable levels) and performance (maintaining adequate cooling capacity and energy efficiency).
2Adaptability or versatility
If installation height is not properly controlled, then installation flexibility is improved, but refrigerant leakage safety and comfort deteriorate
Solution Approach 1:
The system incorporates feedback by measuring or obtaining the actual installation height and using this information to calculate and adjust the maximum allowable refrigerant filling level. This feedback mechanism ensures that the refrigerant charge is always appropriate for the specific installation height, maintaining safety while allowing flexible installation locations.
Solution Approach 2:
The system changes the refrigerant filling level parameter based on the installation height parameter. When installation height varies, the system automatically adjusts the permissible refrigerant amount to maintain safety compliance, enabling flexible installation while preserving safety standards.
3Manufacturing precision
If indication section is added to specify installation requirements, then installation correctness is improved, but device complexity increases
Solution Approach 1:
The system provides self-service by automatically calculating and displaying the maximum allowable refrigerant filling level and installation requirements based on room characteristics. This eliminates the need for complex external calculation tools or manual reference to standards, as the system itself generates the necessary installation guidance information.
Solution Approach 2:
The indication section serves multiple functions: it displays installation height requirements, maximum refrigerant filling levels, and compliance information. By consolidating these various installation guidance functions into a single integrated display system, the patent avoids increasing device complexity while improving installation correctness.
Data Source
AI summary
An indoor unit of an air-conditioning apparatus includes a housing, an indoor heat exchanger that is disposed in the housing and to which flammable refrigerant is supplied, and an indication section that indicates a minimum distance from a floor surface of the housing when installed on a wall of a room (installation height H0) along with an identifier on a lower surface of the housing.