Triple-evaporator air conditioner and variable frequency control method

Abstract

The present invention relates to a one-to-three air conditioner and its frequency conversion control method. The air conditioner includes an indoor unit and an outdoor unit, wherein the frequency conversion compressor of the outdoor unit and the controller of the indoor unit are connected with output 30Hz-60Hz, 60Hz ~90Hz, 90Hz~120Hz frequency conversion controller; the control method is that when one indoor unit is running, the frequency conversion controller output frequency is 30Hz~60Hz; when two indoor units are running, the output frequency is 60Hz~90Hz; When three indoor units are running, the output frequency is 90Hz~120Hz. The present invention is more energy-saving than ordinary industrial frequency one-drag multiple air conditioners; the control method is simple, reliable, and has fewer problems; no matter when a single indoor unit is working, or when two indoor units or three indoor units are working at the same time, the pressure of the compressor system is basically the same. The same, it is not easy to trip, and the operation reliability is high. The invention has low production and improvement cost; the outdoor unit is small in size and easy to install.

Description

(1) Technical field [0001] The invention relates to the technical field of air conditioners, in particular to a one-drive-three air conditioner and a frequency conversion control method thereof. (2) Background technology [0002] At present, the one-to-many air conditioners with one compressor on the market have the following disadvantages: 1. The power consumption of a single indoor unit is large when running, and the energy efficiency ratio is low. The capacity is slightly smaller than the power consumption of two indoor units running, far greater than the one-to-one air conditioner with the same cooling capacity; 2. The electronic expansion valve is complicated to adjust, the controller is complicated to control, and there are many problems; 3. When a single indoor unit is running , the system pressure is high, it is easy to trip, and the operation reliability is poor. The multi-compressor one-drag multi-air conditioner also has problems such as large power consumption, ...

AI Technical Summary

Problems solved by technology

[0002] At present, the one-to-many air conditioners with one compressor on the market have the following disadvantages: 1. The power consumption of a single indoor unit is large when running, and the energy efficiency ratio is low. The capacity is slightly smaller than the power consumption of two indoor units running, far greater than the one-to-one air conditioner with the same cooling capacity; 2. The electronic expansion valve is complicated to adjust, the controller is complicated to control, and there are many problems; 3. When a single indoor unit is running , the system pressure is high, it is easy to trip, and the operation reliability is poor

The multi-compressor one-drag multi-air conditioner also has problems such as large power consumption, complicated electronic expansion valve adjustment, complicated controller control, and large outdoor unit.

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