Air conditioning system, control device, and control method

JPWO2025150157A5Pending Publication Date: 2026-07-13
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Patent Information

Application Number
JP2025569217
Authority / Receiving Office
JP · JP
Patent Type
Applications
Filing Date
2026-04-09
Publication Date
2026-07-13

AI Technical Summary

Technical Problem

Existing air conditioning systems face issues when the refrigerant flow between the outdoor and indoor units is shut off, leading to potential deformation of piping or expansion valves due to trapped liquid refrigerant.

Method used

A control method that includes opening the expansion valve when the refrigerant flow is shut off by a shutoff device to prevent liquid refrigerant from being confined in a sealed state, allowing it to move to the gas pipe and avoid deformation.

Benefits of technology

Prevents deformation of piping and expansion valves by ensuring the liquid refrigerant does not become trapped, maintaining system safety and integrity during abnormal conditions.

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Abstract

This air conditioning system (1) comprises: a refrigerant circuit (2) that circulates a refrigerant; and at least one control device (110, 210, 310) that controls the refrigerant circuit. The refrigerant circuit is provided with: an outdoor unit (10); at least one indoor unit (20) including an expansion valve (25) for expanding the refrigerant flowing in from the outdoor unit; and at least one blocking device (30) for blocking the flow of the refrigerant between the outdoor unit and the at least one indoor unit. The at least one control device opens the expansion valve when the flow of the refrigerant is blocked by the at least one blocking device.
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