| 摘要 |
PURPOSE: A vending machine having a power compensation circuit is provided, which continues to sell products as maintaining the characteristics of raw material or products even when the apparatus is out of order. CONSTITUTION: A power supply apparatus includes a circuit breaker(111), a fuse(112) and a switching mode power supply(SMPS)(113) converting commercial power supply voltage to proper voltage. A cooling unit(120) includes a condenser(121), a PTC(Positive resistance/Temperature Coefficient)(122), an OLP(Over Load Protector)(123), a compressor fan motor(124), a thermistor(TH1) for controlling compressor fan motor, and a thermistor(TH2) for preventing condenser overheating. The first relay has the first relay driving part(150) driven according to a control signal from a control unit(130), and the first contact point(151) operating to prevent a power from being supplied to the cooling unit by the firs relay driving part. And the control unit controls the first relay by transmitting the control signal according to a temperature detected by a temperature sensor(140). |
