Air conditioner
A technology for air conditioners and compressors, which is applied to air conditioning systems, refrigerators, compressors, etc., can solve problems such as abnormal stop of air conditioners, and achieve the effect of reliable startup.
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no. 1 approach
[0025] Hereinafter, a first embodiment of the present invention will be described in detail with reference to the drawings. figure 1 It is a schematic configuration diagram of the air conditioner 10 according to the first embodiment, and shows a refrigeration cycle applied to the air conditioner 10 .
[0026] The air conditioner 10 is composed of an indoor unit (indoor unit) 100 and an outdoor unit (outdoor unit) 110 . On the path of the refrigeration cycle (heat pump) in the air conditioner 10, an indoor heat exchanger 101 is provided on the indoor unit 100 side, and a compressor 111, an outdoor heat exchanger 112, a four-way valve 113 and an expansion valve are provided on the outdoor unit 110 side. Valve 114. In addition, the indoor unit 100 includes an indoor fan 102 that sends air heat-exchanged by the indoor heat exchanger 101 indoors, and the outdoor unit 110 includes an outdoor fan 115 that sends air to the outdoor heat exchanger 112 .
[0027] Moreover, the air cond...
no. 2 approach
[0041] In the above-described first embodiment, in the first start-up sequence and the second start-up sequence, the timing of increasing the motor drive current is controlled based on the compressor rotation speed. However, the present invention is not limited thereto, and the timing of increasing the motor drive current may be controlled based on the elapsed time from the startup.
[0042] For example, in image 3 In the timing chart shown, the time t11 at which the compressor rotation speed is predicted to reach N11 and the time t12 at which the compressor rotation speed is predicted to reach N12 may be set in advance, and the control unit may increase the motor drive current when the times t11 and t12 have elapsed. .
[0043] Similarly, in Figure 4 In the timing chart shown, the time t21 when the compressor rotation speed N21 is expected to be reached and the time t22 when the compressor rotation speed N22 is expected to be reached are set in advance, and the control un...
no. 3 approach
[0046] In the above-described first embodiment, the current values (ie, I1 and I2 ) of the motor drive current (starting current) that rises stepwise during the start are the same in both the first start sequence and the second start sequence. However, the present invention is not limited thereto, and the starting current may also be different in the first starting procedure and the second starting procedure (the motor driving current I3 finally reached is the same).
[0047] Specifically, the startup currents I1' and I2' in the second startup procedure may be greater than the startup currents I1 and I2 in the first startup procedure (I1'>I1 and I2'>I2). In this way, by making the start-up current in the second start-up procedure larger than the start-up current in the first start-up procedure, it is possible to more reliably prevent the start-up failure of the compressor 111 .
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