Variable frequency air conditioner low temperature refrigeration control method and device and variable frequency air conditioner

By monitoring the intake superheat and outlet temperature difference of the inverter air conditioner, and adjusting the compressor frequency, outdoor electronic expansion valve opening, and outdoor fan speed, the problem of poor cooling performance of the air conditioner in low-temperature environments was solved, achieving more efficient and reliable low-temperature cooling.

CN117029213BActive Publication Date: 2026-07-21NINGBO AUX ELECTRIC CO LTD +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
NINGBO AUX ELECTRIC CO LTD
Filing Date
2023-08-30
Publication Date
2026-07-21

AI Technical Summary

Technical Problem

Existing air conditioners struggle to achieve effective cooling in low-temperature environments, which can lead to problems such as evaporator frosting, incomplete refrigerant evaporation, and compressor wear, affecting operational reliability and user experience.

Method used

By monitoring the intake superheat and outlet air temperature difference of the inverter air conditioner, the compressor frequency, outdoor electronic expansion valve opening, and outdoor fan speed are adjusted to achieve parameter optimization in low-temperature cooling mode.

Benefits of technology

It improves the low-temperature cooling effect and operational reliability of inverter air conditioners, and enhances the user experience.

✦ Generated by Eureka AI based on patent content.

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Abstract

The application provides a control method and device for low-temperature refrigeration of a variable-frequency air conditioner and the variable-frequency air conditioner; the method comprises the following steps: firstly, determining a refrigeration operation mode according to an outdoor environment temperature when the variable-frequency air conditioner starts and a preset temperature threshold; then, in the low-temperature refrigeration mode, periodically acquiring detection parameters of the variable-frequency air conditioner, calculating suction superheat according to a suction temperature and an evaporation temperature, calculating a temperature difference value according to an outlet air temperature and a user-set temperature; and adjusting operation parameters of the variable-frequency air conditioner according to the suction superheat, the temperature difference value, a coil temperature and preset parameter thresholds, wherein the operation parameters comprise at least one of a compressor frequency, an outdoor electronic expansion valve opening degree and an outdoor fan rotating speed; and controlling the variable-frequency air conditioner to operate according to the adjusted operation parameters. The above control mode realizes refrigeration operation of the variable-frequency air conditioner in a low-temperature environment, improves operation reliability and comfort, and thus improves user experience.
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Citation Information

Patent Citations

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    CN111141009A

  • Air conditioner control method and device, air conditioner and storage medium

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  • Refrigeration control method and air conditioner

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