Photovoltaic air conditioning system and control method and control apparatus therefor

By using a two-stage control process, the air conditioning compressor speed is adjusted according to changes in DC bus voltage and power supply and demand, thus solving the problem of unstable operation of the photovoltaic air conditioning system after a power outage and achieving stable operation of the air conditioning system.

WO2026123639A1 Publication Date: 2026-06-18QINGDAO HAIER AIR CONDITIONER GENERAL CORP LTD +2
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Patent Information

Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
QINGDAO HAIER AIR CONDITIONER GENERAL CORP LTD
Filing Date
2025-06-23
Publication Date
2026-06-18

AI Technical Summary

⚠Technical Problem

When the power grid is interrupted, the photovoltaic air conditioning system will become unstable and affect its use because the power provided by the photovoltaic modules cannot meet the needs of the air conditioning system.

⚗Method used

A two-stage control process is adopted: First, the first target speed is determined based on the DC bus voltage of the photovoltaic air conditioning system, and the air conditioning compressor is controlled to follow the voltage change; then, the second target speed is determined based on the output power of the photovoltaic module and the power demand of the air conditioning load, and the air conditioning compressor is controlled to follow the power supply and demand change.

🎯Benefits of technology

This improves the operational stability of the photovoltaic air conditioning system in off-grid conditions, ensuring the continuous and stable operation of the air conditioning system.

✦ Generated by Eureka AI based on patent content.

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Abstract

Disclosed in the present invention are a photovoltaic air conditioning system and a control method and control apparatus therefor, which solve the technical problem of unstable operation of existing photovoltaic air conditioning systems. The control method comprises: acquiring real-time output power of a photovoltaic module in the photovoltaic air conditioning system and real-time required power of an air conditioning load; when the photovoltaic air conditioning system is in an off-grid state and the real-time output power of the photovoltaic module is less than the real-time required power of the air conditioning load, sequentially executing the following first control process and second control process, wherein the first control process comprises: determining a first target rotation speed on the basis of a real-time direct current bus voltage of the photovoltaic air conditioning system, and controlling, on the basis of the first target rotation speed, an air conditioner compressor to operate; and the second control process comprises: when the first control process ends, determining a second target rotation speed on the basis of the real-time output power of the photovoltaic module and the real-time required power of the air conditioner load, and controlling, on the basis of the second target rotation speed, the air conditioner compressor to operate.
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