Control circuit, control method and device of control circuit and air conditioner
A control circuit and control device technology, applied in the direction of output power conversion device, electrical components, AC power input conversion to AC power output, etc., can solve the problem of temperature rise, component damage of frequency conversion main circuit, and affecting frequency conversion main circuit Work stability and other issues to achieve the effect of improving service life, protecting safety, and reducing over-current burnout
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Embodiment 1
[0057] In one embodiment of the present invention, as figure 1 As shown, the control circuit 100 includes a capacitor 102, the capacitor 102 is configured to supply power to the load; a pre-charging circuit 104, the pre-charging circuit 104 is configured to charge the capacitor 102, the first end of the pre-charging circuit 104 is connected to the bus line, The second end of the pre-charging circuit 104 is connected to the capacitor 102; the first switching device 106, and the first switching device 106 is connected in series between the first end of the pre-charging circuit 104 and the bus line or between the second end of the pre-charging circuit 104 and the bus line. between the capacitors 102; the control device 108, the control device 108 is connected to the control terminal of the first switching device 106, and the control device 108 is configured to control the conduction state of the first switching device 106 according to the load demand information.
[0058] In the ...
Embodiment 2
[0072]In the above embodiment, the control circuit 100 further includes: a second switching device 114, the first end of the second switching device 114 is connected to the bus line, and the second end of the second switching device 114 is connected to the capacitor 102; the control device 108 is also used for: controlling the conduction state of the second switching device 114 according to the comparison result of the bus voltage and the voltage threshold.
[0073] In this embodiment, the control circuit 100 further includes a second switching device 114, wherein the first end of the second switching device 114 is connected to the bus line, and the second end of the second switching device 114 is connected to the capacitor 102, that is The pre-charging circuit 104 connected in series and the first switching device 106 and the second switching device 114 form a parallel relationship, and whether the pre-charging circuit 104 finishes charging the capacitor 102 can be controlled ...
Embodiment 3
[0076] In any of the above embodiments, taking an air conditioner including an indoor unit and an outdoor unit as an example, the control circuit is arranged in the outdoor unit, and a controller is arranged in the indoor unit, wherein the controller communicates with the control device, and the indoor unit When the outdoor unit is powered by the same driving power supply, combined with figure 1 and figure 2 As shown, the control device 108 installed in the outdoor unit specifically performs the following steps:
[0077] S202, judging whether the power-on demand is zero, if the judgment result is yes, execute S204, and if the judgment result is no, execute S210;
[0078] S204, the first switching device is turned off;
[0079] S206, the second switching device is turned off;
[0080] S208, the driving power is disconnected;
[0081] S210, turning on the first switching device;
[0082] S212, judging that the bus voltage Vdc reaches the voltage threshold, if the judgment ...
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