| 摘要 |
PURPOSE: A surge current prevention circuit of an inverter type air conditioner is provided to limit surge current by eliminating a relay and a temperature switch and by adding a chip bridge diode to an outdoor unit. CONSTITUTION: An outdoor communicator(21) is connected to an indoor communicator(13) through a connector(14). An outdoor controller(23) is connected to the outdoor communicator, a power supplier(22) and an inverter(25). The output of the inverter is connected to a compressor(24) and a capacitor(C1) is connected to the input of the inverter and a first bridge diode(26) in a line. A ninth diode(D9) is connected between the capacitor and the power supplier and a resistance(R1) is connected to the capacitor between the ninth diode and the power supplier in serial. The first bridge diode is connected to the input of the capacitor and a first and a second power line(L1,L2). A second bridge diode(27) is connected to the first and the second power lines, and the input and the output of the power supplier. A fuse is installed between the second power line and the second bridge diode. The second bridge diode feeds power to the power supplier from the first power line before a second relay(RY2) is turned on. A discharge voltage interceptor(28) composed of the ninth diode and the resistance intercepts discharge voltage from the capacitor. The ninth diode feeds less than 1A of current to the capacitor and the resistance limits current from the power supplier. The outdoor controller controls the power supplier to output small current from the second bridge diode to fill the capacitor. On filling the capacitor up to a regular range, the second relay is turned on and the inverter is driven to limit surge current. |
