An oil blocking prevention control method and system based on a gas-electricity complementary heating system
By calculating the oil return risk index and adjusting the output of the gas boiler and the opening of the electronic expansion valve in the gas-electric complementary heating system, the problem of insufficient lubricating oil return under low temperature and low load conditions was solved, achieving efficient lubricating oil return and heating stability, and improving the system's operational reliability and user comfort.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- GANZHOU HUAAN ENERGY TECHNOLOGY CO LTD
- Filing Date
- 2026-06-08
- Publication Date
- 2026-07-17
AI Technical Summary
Existing single heat pump oil return control strategies cannot effectively solve the problem of insufficient lubricating oil return under low temperature and low load conditions, resulting in compressor wear and unstable heating. Gas-electric complementary heating systems lack heat source coordination control logic and cannot balance oil return reliability and heating comfort.
By acquiring the operating parameters of the gas-electric complementary heating system, the oil return risk index is calculated. When the risk index reaches the threshold, the output of the gas boiler and the opening of the electronic expansion valve are adjusted to achieve the oil return mode. Combined with the buffer water tank and bypass valve, the heat on the user side is adjusted to ensure the return of lubricating oil.
It improves the lubricating oil return efficiency, reduces the risk of compressor wear, stabilizes the heating temperature, and enhances system reliability and user comfort.
Smart Images
Figure CN122408121A_ABST