Air conditioner, and method of controlling air conditioner

Abstract

The present invention provides an air-conditioner and an air-conditioner control method. The air conditioner includes an outdoor unit (2) having an outdoor heat exchanger, a plurality of indoor units (3a to 3d) each having an indoor heat exchanger, a refrigerant circuit, which links the outdoor heat exchanger, a compressor (20), and the indoor heat exchangers together, electric motor operated valves (33a to 33d), which are provided in the refrigerant circuit and serve to adjust the amount of refrigerant flowing into each of the indoor heat exchangers, respectively. a discharge pipe thermistor (24)serving to detect the temperature of the discharge pipe of the compressor, and an outdoor controller (27). In the case where there are a plurality of indoor units that are not operating during heating operation, the outdoor controller controls, on the basis of the delivery temperature, the degrees of opening of the motor-operated valves corresponding to the indoor units that are not operating. Further, the outdoor controller individually corrects the degrees of opening of the motor-operated valves corresponding to the indoor units that are not operating. According to the present invention , the air conditioner is capable of stabilized refrigerant control even when a multiple type air conditioner is performing heating operation or even when there are a plurality of indoor units that are not operating.

Description

technical field [0001] The invention relates to an air conditioner, in particular to a multi-model air conditioner in which one outdoor unit is connected to several indoor units, and a control method for the multi-model air conditioner. Background technique [0002] Among air conditioners composed of an outdoor unit and an indoor unit, there is a so-called multi-type air conditioner in which one outdoor unit is connected to several indoor units. [0003] In a multi-model air conditioner, a refrigerant circuit is formed between an outdoor unit having a compressor and an outdoor heat exchanger and a plurality of indoor units each having an indoor heat exchanger, and each indoor heat exchanger in the refrigerant circuit There are electric valves to adjust the amount of refrigerant flowing into each indoor heat exchanger. During heating operation, the high-temperature refrigerant from the compressor is distributed to each indoor heat exchanger, and each indoor heat exchanger pe...

AI Technical Summary

Problems solved by technology

In addition, when the floor of a stop room is lower than other stop rooms, the pressure difference caused by the height difference will make the stop room on the lower floor prone to fluid accumulation.

Once this kind of liquid accumulation occurs, the heating capacity will be insufficient or the efficiency will be reduced due to the reduction of the overall circulating refrigerant amount of the system.

Sometimes it may cause the temperature of the compressor to rise, which will affect the durability of the compressor

[0005] In addition, there may be cases where the amount of liquid refrigerant remaining in each stop room is different even though it does not reach the level of liquid accumulation.

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