Variable frequency air conditioner and control method thereof
A technology of frequency conversion air conditioner and control method, applied in the direction of control input related to air characteristics, space heating and ventilation control input, heating and ventilation control system, etc. increase, the air conditioner cannot run stably, etc., to achieve the effect of increasing the exhaust temperature and condensing pressure, reducing energy loss, and reducing starting torque and power
Active Publication Date: 2016-04-20
QINGDAO HAIER AIR CONDITIONER GENERAL CORP LTD
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Problems solved by technology
When the compression ratio is lower than the compression ratio of the normal operation of the compressor, the suction specific volume of the compressor will increase and the efficiency will decrease, resulting in a decrease in the energy efficiency of the air conditioner, which cannot meet the APF test requirements
[0003] In addition, the compressor runs at a low frequency during the energy efficiency test, the exhaust temperature is prone to fluctuations, and the compressor body will also produce abnormal noise, resulting in the unstable operation of the air conditioner and affecting the reliability of the compressor
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[0026] figure 1 It is a schematic diagram of an inverter air conditioner 100 according to an embodiment of the present invention. The inverter air conditioner 100 of this embodiment includes: a compressor 110 , an exhaust temperature detector 120 and an external fan 130 .
[0027] The working process of the inverter air conditioner 100 is that the compressor 110 compresses the gas refrigerant and discharges the high-temperature and high-pressure gas; the refrigerant becomes a high-temperature and high-pressure liquid and flows to the outdoor heat exchanger 140 . The external fan 130 is turned on, exchanging heat with the outdoor ambient air through the outdoor heat exchanger 140 to release the heat in the refrigerant; the refrigerant is throttled by capillary tubes, and changes from a high-temperature and high-pressure liquid to a low-temperature and low-pressure gas-liquid mixture. The refrigerant then passes through the indoor heat exchanger 140, evaporates and absorbs indoo...
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The invention provides a variable frequency air conditioner and a control method thereof. The control method of the variable frequency air conditioner comprises the following steps: acquiring exhaust temperature of a compressor of the variable frequency air conditioner; judging whether the exhaust temperature of the compressor is less than a preset temperature threshold; and if so, carrying out repeated switching operation on the outdoor fan of the variable frequency air conditioner in the preset period. According to the variable frequency air conditioner, when APF energy efficiency testing is performed, the heat exchange air flow of the air conditioner outdoor unit heat exchanger is reduced, thereby enhancing the exhaust temperature and condensing pressure of the compressor; and thus, the compressor operates under reasonable compression ratio, so that the energy consumption of the air conditioner is enhanced, and the exhaust temperature fluctuation is reduced, thereby avoiding the abnormal sound of the compressor and enhancing the stability of the air conditioner during APF energy efficiency testing.
Description
technical field [0001] The invention relates to the field of air conditioners, in particular to an inverter air conditioner and a control method thereof. Background technique [0002] The new energy efficiency standard for inverter air conditioners introduces the APF (Annual Performance Factor, annual energy consumption efficiency) evaluation index. During the APF energy efficiency test of the inverter air conditioner, when the compressor operates in the low frequency band, the refrigerant circulation is small, the exhaust temperature and condensation temperature are low, and the compression ratio is low. When the compression ratio is lower than the normal operating compression ratio of the compressor, the suction specific volume of the compressor will increase and the efficiency will decrease, resulting in a decrease in the energy efficiency of the air conditioner, which cannot meet the APF test requirements. [0003] In addition, the compressor runs at a low frequency dur...
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IPC IPC(8): F24F11/00F24F11/02
CPCF24F11/30F24F11/62F24F11/64F24F11/70F24F11/89F24F2110/00
Inventor 吕福俊冷冰李伟
Owner QINGDAO HAIER AIR CONDITIONER GENERAL CORP LTD
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