| 摘要 |
An apparatus controls an appliance, the appliance including a compressor (48), a fan (50), and a heater (52). The apparatus includes a first switch (44) for selectively coupling a first terminal (56) with one of a second terminal (58) and a third terminal (60) in response to a first control signal. The first terminal (56) is coupled with an energy source (41) and the third terminal (60) is coupled with the compressor (48). The apparatus further includes a second switch (46) for selectively coupling the second terminal (58) with the heater (52) and the third terminal (60) with the fan (50) in response to a second control signal. The apparatus still further includes a control circuit (42) coupled with the first switch (44) and the second switch (46) for generating the first control signal and the second control signal. A relay drive circuit (128) couples relay coils in series to control the first switch (132), the second switch (136), and the third switch (138). A bypass switch (140) allows a single current to selectively energize one or both relay coils (142,152). <IMAGE> |
