Fujitsu General. has filed a patent for an air conditioner with a refrigerant circuit connecting indoor and outdoor units. The system includes a memory storing an estimation model to determine refrigerant levels based on operating conditions. This innovation aims to improve efficiency and maintenance of air conditioning systems. GlobalData’s report on Fujitsu General gives a 360-degree view of the company including its patenting strategy. Buy the report here.
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According to GlobalData’s company profile on Fujitsu General, Smart climate control systems was a key innovation area identified from patents. Fujitsu General's grant share as of January 2024 was 15%. Grant share is based on the ratio of number of grants to total number of patents.
Refrigerant amount estimation system for air conditioner
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The patent application (Publication Number: US20240027086A1) describes an innovative air conditioner with a refrigerant circuit that includes an indoor unit, outdoor unit, compressor, heat exchangers, and an expansion valve. The system incorporates a memory storing an estimation model to determine the remaining refrigerant amount in the circuit based on operating state quantities. The processing circuitry regularly acquires operating state data during air conditioning operation, detects specific operating state quantities indicating stability conditions, and estimates the refrigerant amount using the model and detected data.
Furthermore, the patent application details the differentiation between first and second stability conditions, with the second condition being milder than the first. The estimation process involves using the first or second operating state quantities based on the frequency of their detection within a predetermined period. The detection criteria include variations in compressor rotation speed and refrigerant discharge temperature compared to target values. Additionally, the estimation process may output an average of estimated refrigerant amounts at predetermined timings. This innovative air conditioner design aims to enhance efficiency and performance by accurately estimating and managing the refrigerant levels in the system, ultimately improving overall functionality and longevity.
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GlobalData Patent Analytics tracks bibliographic data, legal events data, point in time patent ownerships, and backward and forward citations from global patenting offices. Textual analysis and official patent classifications are used to group patents into key thematic areas and link them to specific companies across the world’s largest industries.
