Air conditioner, outdoor unit of air conditioner, heating air supplementing method and refrigeration air supplementing method

Abstract

The invention provides an outdoor unit of an air conditioner. The outdoor unit comprises a compressor, an outdoor heat exchanger, a first pipeline and an outdoor electronic expansion valve, wherein the first pipeline is used for connecting the indoor unit and the outdoor heat exchanger, the outdoor electronic expansion valve is connected in series onto the first pipeline, the compressor is a first double-rotor compressor, the first double-rotor compressor is provided with a first auxiliary air suction opening, a first main air suction opening and a first exhaust opening, the first main air suction opening is respectively connected with a four-way valve of the air conditioner, the outdoor unit also comprises a medium-pressure liquid storage tank positioned between the indoor unit and the outdoor electronic expansion valve, the medium-pressure liquid storage tank is connected in series onto the first pipeline and is provided with an air outlet, an inlet and a liquid outlet, the air outlet is connected with the first auxiliary air suction opening through a first auxiliary pipeline, and the inlet and the liquid outlet are respectively connected with the first pipeline. The outdoor unit of the air conditioner provided by the invention has the advantage that through the additional arrangement of the medium-pressure liquid storage tank and the adoption of the first double-rotor compressor, the low-temperature heating capability of the whole air conditioner is improved. The invention also provides the air conditioner, a heating air supplementing method of the air conditioner and a refrigeration air supplementing method of the air conditioner.

Description

technical field [0001] The present invention relates to the technical field of air conditioning, and more specifically relates to an air conditioner and its outdoor unit, a heating and air supply method for the air conditioner, and a cooling and air supply method for the air conditioner. Background technique [0002] With the development of air conditioning technology, air conditioners are gradually being widely used. For air conditioners, the quality of the compressor directly affects the performance of the air conditioner. Due to the limitation of the compressor itself, the temperature range of the normal operation of the air conditioning system is limited, and there is a problem of poor low-temperature heating capacity. During the heating process, as the ambient temperature drops, the evaporation temperature of the refrigerant drops, and the specific volume of the refrigerant on the suction side of the compressor increases continuously. Since the suction volume of the co...

AI Technical Summary

Problems solved by technology

Due to the limitation of the compressor itself, the temperature range of the normal operation of the air conditioning system is limited, and there is a problem of poor heating capacity at low temperature

During the heating process, as the ambient temperature drops, the evaporation temperature of the refrigerant drops, and the specific volume of the refrigerant on the suction side of the compressor increases continuously. Since the suction volume of the compressor remains unchanged, the suction capacity of the compressor Decrease, so that the amount of refrigerant flowing through the outdoor heat exchanger and indoor heat exchanger decreases, the heating capacity of the air conditioner decreases accordingly, and the problem of poor heating at low temperature is more likely to occur

[0003] In addition, during the heating process, the suction capacity of the compressor operating in a low-temperature environment decreases, which easily leads to an excessively high discharge temperature of the compressor, resulting in lower reliability of the compressor

[0004] In addition, when cooling at high temperature, the air conditioner will also have the problem of poor cooling capacity.

In the cooling process, as the ambient temperature rises, the heat transfer temperature difference decreases, and the heat transfer of the outdoor heat exchanger is difficult. It is necessary to increase the refrigerant flow rate by increasing the frequency to improve the heat transfer, but the increase in frequency will cause the exhaust temperature to be too high. Resulting in lower compressor reliability

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